upgrade draco to 1.5.6

Signed-off-by: Jackie9527 <80555200+Jackie9527@users.noreply.github.com>

contrib/draco/.cmake-format.py

@@ -1,102 +1,137 @@
-# Generated with cmake-format 0.5.1
+with section('parse'):
-# How wide to allow formatted cmake files
+  # Specify structure for custom cmake functions
-line_width = 80
+  additional_commands = {
-
+      'draco_add_emscripten_executable': {
-# How many spaces to tab for indent
+          'kwargs': {
-tab_size = 2
+              'NAME': '*',
-
+              'SOURCES': '*',
-# If arglists are longer than this, break them always
+              'OUTPUT_NAME': '*',
-max_subargs_per_line = 10
+              'DEFINES': '*',
-
+              'INCLUDES': '*',
-# If true, separate flow control names from their parentheses with a space
+              'COMPILE_FLAGS': '*',
-separate_ctrl_name_with_space = False
+              'LINK_FLAGS': '*',
-
+              'OBJLIB_DEPS': '*',
-# If true, separate function names from parentheses with a space
+              'LIB_DEPS': '*',
-separate_fn_name_with_space = False
+              'GLUE_PATH': '*',
-
+              'PRE_LINK_JS_SOURCES': '*',
-# If a statement is wrapped to more than one line, than dangle the closing
+              'POST_LINK_JS_SOURCES': '*',
-# parenthesis on its own line
+              'FEATURES': '*',
-dangle_parens = False
+          },
-
+          'pargs': 0,
-# What character to use for bulleted lists
+      },
-bullet_char = '*'
+      'draco_add_executable': {
-
+          'kwargs': {
-# What character to use as punctuation after numerals in an enumerated list
+              'NAME': '*',
-enum_char = '.'
+              'SOURCES': '*',
-
+              'OUTPUT_NAME': '*',
-# What style line endings to use in the output.
+              'TEST': 0,
-line_ending = u'unix'
+              'DEFINES': '*',
-
+              'INCLUDES': '*',
-# Format command names consistently as 'lower' or 'upper' case
+              'COMPILE_FLAGS': '*',
-command_case = u'lower'
+              'LINK_FLAGS': '*',
-
+              'OBJLIB_DEPS': '*',
-# Format keywords consistently as 'lower' or 'upper' case
+              'LIB_DEPS': '*',
-keyword_case = u'unchanged'
+          },
-
+          'pargs': 0,
-# Specify structure for custom cmake functions
+      },
-additional_commands = {
+      'draco_add_library': {
-  "foo": {
+          'kwargs': {
-    "flags": [
+              'NAME': '*',
-      "BAR",
+              'TYPE': '*',
-      "BAZ"
+              'SOURCES': '*',
-    ],
+              'TEST': 0,
-    "kwargs": {
+              'OUTPUT_NAME': '*',
-      "HEADERS": "*",
+              'DEFINES': '*',
-      "DEPENDS": "*",
+              'INCLUDES': '*',
-      "SOURCES": "*"
+              'COMPILE_FLAGS': '*',
+              'LINK_FLAGS': '*',
+              'OBJLIB_DEPS': '*',
+              'LIB_DEPS': '*',
+              'PUBLIC_INCLUDES': '*',
+          },
+          'pargs': 0,
+      },
+      'draco_generate_emscripten_glue': {
+          'kwargs': {
+              'INPUT_IDL': '*',
+              'OUTPUT_PATH': '*',
+          },
+          'pargs': 0,
+      },
+      'draco_get_required_emscripten_flags': {
+          'kwargs': {
+              'FLAG_LIST_VAR_COMPILER': '*',
+              'FLAG_LIST_VAR_LINKER': '*',
+          },
+          'pargs': 0,
+      },
+      'draco_option': {
+          'kwargs': {
+              'NAME': '*',
+              'HELPSTRING': '*',
+              'VALUE': '*',
+          },
+          'pargs': 0,
+      },
+      # Rules for built in CMake commands and those from dependencies.
+      'list': {
+          'kwargs': {
+              'APPEND': '*',
+              'FILTER': '*',
+              'FIND': '*',
+              'GET': '*',
+              'INSERT': '*',
+              'JOIN': '*',
+              'LENGTH': '*',
+              'POP_BACK': '*',
+              'POP_FRONT': '*',
+              'PREPEND': '*',
+              'REMOVE_DUPLICATES': '*',
+              'REMOVE_ITEM': '*',
+              'REVERSE': '*',
+              'SORT': '*',
+              'SUBLIST': '*',
+              'TRANSFORM': '*',
+          },
+      },
+      'protobuf_generate': {
+        'kwargs': {
+            'IMPORT_DIRS': '*',
+            'LANGUAGE': '*',
+            'OUT_VAR': '*',
+            'PROTOC_OUT_DIR': '*',
+            'PROTOS': '*',
+        },
+      },
   }
-  }
-}
 
-# A list of command names which should always be wrapped
+with section('format'):
-always_wrap = []
+  # Formatting options.
 
-# Specify the order of wrapping algorithms during successive reflow attempts
+  # How wide to allow formatted cmake files
-algorithm_order = [0, 1, 2, 3, 4]
+  line_width = 80
 
-# If true, the argument lists which are known to be sortable will be sorted
+  # How many spaces to tab for indent
-# lexicographicall
+  tab_size = 2
-autosort = False
 
-# enable comment markup parsing and reflow
+  # If true, separate flow control names from their parentheses with a space
-enable_markup = True
+  separate_ctrl_name_with_space = False
 
-# If comment markup is enabled, don't reflow the first comment block in
+  # If true, separate function names from parentheses with a space
-# eachlistfile. Use this to preserve formatting of your
+  separate_fn_name_with_space = False
-# copyright/licensestatements.
-first_comment_is_literal = False
 
-# If comment markup is enabled, don't reflow any comment block which matchesthis
+  # If a statement is wrapped to more than one line, than dangle the closing
-# (regex) pattern. Default is `None` (disabled).
+  # parenthesis on its own line.
-literal_comment_pattern = None
+  dangle_parens = False
 
-# Regular expression to match preformat fences in comments
+  # Do not sort argument lists.
-# default=r'^\s*([`~]{3}[`~]*)(.*)$'
+  enable_sort = False
-fence_pattern = u'^\\s*([`~]{3}[`~]*)(.*)$'
 
-# Regular expression to match rulers in comments
+  # What style line endings to use in the output.
-# default=r'^\s*[^\w\s]{3}.*[^\w\s]{3}$'
+  line_ending = 'unix'
-ruler_pattern = u'^\\s*[^\\w\\s]{3}.*[^\\w\\s]{3}$'
 
-# If true, emit the unicode byte-order mark (BOM) at the start of the file
+  # Format command names consistently as 'lower' or 'upper' case
-emit_byteorder_mark = False
+  command_case = 'canonical'
 
-# If a comment line starts with at least this many consecutive hash characters,
+  # Format keywords consistently as 'lower' or 'upper' case
-# then don't lstrip() them off. This allows for lazy hash rulers where the first
+  keyword_case = 'upper'
-# hash char is not separated by space
-hashruler_min_length = 10
-
-# If true, then insert a space between the first hash char and remaining hash
-# chars in a hash ruler, and normalize its length to fill the column
-canonicalize_hashrulers = True
-
-# Specify the encoding of the input file. Defaults to utf-8.
-input_encoding = u'utf-8'
-
-# Specify the encoding of the output file. Defaults to utf-8. Note that cmake
-# only claims to support utf-8 so be careful when using anything else
-output_encoding = u'utf-8'
-
-# A dictionary containing any per-command configuration overrides. Currently
-# only `command_case` is supported.
-per_command = {}

contrib/draco/.gitattributes

@@ -0,0 +1 @@
+*.obj eol=lf

contrib/draco/.gitmodules

@@ -0,0 +1,12 @@
+[submodule "third_party/googletest"]
+  path = third_party/googletest
+  url = https://github.com/google/googletest.git
+[submodule "third_party/eigen"]
+  path = third_party/eigen
+  url = https://gitlab.com/libeigen/eigen.git
+[submodule "third_party/tinygltf"]
+  path = third_party/tinygltf
+  url = https://github.com/syoyo/tinygltf.git
+[submodule "third_party/filesystem"]
+  path = third_party/filesystem
+  url = https://github.com/gulrak/filesystem

contrib/draco/BUILDING.md

@@ -4,8 +4,10 @@ _**Contents**_
   * [Mac OS X](#mac-os-x)
   * [Windows](#windows)
   * [CMake Build Configuration](#cmake-build-configuration)
+    * [Transcoder](#transcoder)
     * [Debugging and Optimization](#debugging-and-optimization)
     * [Googletest Integration](#googletest-integration)
+    * [Third Party Libraries](#third-party-libraries)
     * [Javascript Encoder/Decoder](#javascript-encoderdecoder)
     * [WebAssembly Decoder](#webassembly-decoder)
     * [WebAssembly Mesh Only Decoder](#webassembly-mesh-only-decoder)
@@ -72,6 +74,43 @@ C:\Users\nobody> cmake ../ -G "Visual Studio 16 2019" -A x64
 CMake Build Configuration
 -------------------------
 
+Transcoder
+----------
+
+Before attempting to build Draco with transcoding support you must run an
+additional Git command to obtain the submodules:
+
+~~~~~ bash
+# Run this command from within your Draco clone.
+$ git submodule update --init
+# See below if you prefer to use existing versions of Draco dependencies.
+~~~~~
+
+In order to build the `draco_transcoder` target, the transcoding support needs
+to be explicitly enabled when you run `cmake`, for example:
+
+~~~~~ bash
+$ cmake ../ -DDRACO_TRANSCODER_SUPPORTED=ON
+~~~~~
+
+The above option is currently not compatible with our Javascript or WebAssembly
+builds but all other use cases are supported. Note that binaries and libraries
+built with the transcoder support may result in increased binary sizes of the
+produced libraries and executables compared to the default CMake settings.
+
+The following CMake variables can be used to configure Draco to use local
+copies of third party dependencies instead of git submodules.
+
+- `DRACO_EIGEN_PATH`: this path must contain an Eigen directory that includes
+  the Eigen sources.
+- `DRACO_FILESYSTEM_PATH`: this path must contain the ghc directory where the
+  filesystem includes are located.
+- `DRACO_TINYGLTF_PATH`: this path must contain tiny_gltf.h and its
+  dependencies.
+
+When not specified the Draco build requires the presence of the submodules that
+are stored within `draco/third_party`.
+
 Debugging and Optimization
 --------------------------
 
@@ -114,17 +153,52 @@ $ cmake ../ -DDRACO_SANITIZE=address
 Googletest Integration
 ----------------------
 
-Draco includes testing support built using Googletest. To enable Googletest unit
+Draco includes testing support built using Googletest. The Googletest repository
-test support the DRACO_TESTS cmake variable must be turned on at cmake
+is included as a submodule of the Draco git repository. Run the following
-generation time:
+command to clone the Googletest repository:
+
+~~~~~ bash
+$ git submodule update --init
+~~~~~
+
+To enable Googletest unit test support the DRACO_TESTS cmake variable must be
+turned on at cmake generation time:
 
 ~~~~~ bash
 $ cmake ../ -DDRACO_TESTS=ON
 ~~~~~
 
-When cmake is used as shown in the above example the googletest directory must
+To run the tests execute `draco_tests` from your build output directory:
-be a sibling of the Draco repository root directory. To run the tests execute
+
-`draco_tests` from your build output directory.
+~~~~~ bash
+$ ./draco_tests
+~~~~~
+
+Draco can be configured to use a local Googletest installation. The
+`DRACO_GOOGLETEST_PATH` variable overrides the behavior described above and
+configures Draco to use the Googletest at the specified path.
+
+Third Party Libraries
+---------------------
+
+When Draco is built with transcoding and/or testing support enabled the project
+has dependencies on third party libraries:
+
+- [Eigen](https://eigen.tuxfamily.org/)
+  - Provides various math utilites.
+- [Googletest](https://github.com/google/googletest)
+  - Provides testing support.
+- [Gulrak/filesystem](https://github.com/gulrak/filesystem)
+  - Provides C++17 std::filesystem emulation for pre-C++17 environments.
+- [TinyGLTF](https://github.com/syoyo/tinygltf)
+  - Provides GLTF I/O support.
+
+These dependencies are managed as Git submodules. To obtain the dependencies
+run the following command in your Draco repository:
+
+~~~~~ bash
+$ git submodule update --init
+~~~~~
 
 WebAssembly Decoder
 -------------------

contrib/draco/README.md

@@ -2,10 +2,93 @@
 <img width="350px" src="docs/artwork/draco3d-vert.svg" />
 </p>
 
-[![Build Status](https://github.com/google/draco/workflows/Build/badge.svg)](https://github.com/google/draco/actions?query=workflow%3ABuild)
+[![draco-ci](https://github.com/google/draco/workflows/draco-ci/badge.svg?branch=master)](https://github.com/google/draco/actions/workflows/ci.yml)
 
 News
 =======
+
+Attention GStatic users: the Draco team strongly recommends using the versioned
+URLs for accessing Draco GStatic content. If you are using the URLs that include
+the `v1/decoders` substring within the URL, edge caching and GStatic propagation
+delays can result in transient errors that can be difficult to diagnose when
+new Draco releases are launched. To avoid the issue pin your sites to a
+versioned release.
+
+### Version 1.5.6 release:
+* Using the versioned www.gstatic.com WASM and Javascript decoders continues
+  to be recommended. To use v1.5.6, use this URL:
+  * https://www.gstatic.com/draco/versioned/decoders/1.5.6/*
+* The CMake flag DRACO_DEBUG_MSVC_WARNINGS has been replaced with
+  DRACO_DEBUG_COMPILER_WARNINGS, and the behavior has changed. It is now a
+  boolean flag defined in draco_options.cmake.
+* Bug fixes.
+* Security fixes.
+
+### Version 1.5.5 release:
+* Using the versioned www.gstatic.com WASM and Javascript decoders continues
+  to be recommended. To use v1.5.5, use this URL:
+  * https://www.gstatic.com/draco/versioned/decoders/1.5.5/*
+* Bug fix: https://github.com/google/draco/issues/935
+
+### Version 1.5.4 release:
+* Using the versioned www.gstatic.com WASM and Javascript decoders continues
+  to be recommended. To use v1.5.4, use this URL:
+  * https://www.gstatic.com/draco/versioned/decoders/1.5.4/*
+* Added partial support for glTF extensions EXT_mesh_features and
+  EXT_structural_metadata.
+* Bug fixes.
+* Security fixes.
+
+### Version 1.5.3 release:
+* Using the versioned www.gstatic.com WASM and Javascript decoders continues
+  to be recommended. To use v1.5.3, use this URL:
+  * https://www.gstatic.com/draco/versioned/decoders/1.5.3/*
+* Bug fixes.
+
+### Version 1.5.2 release
+* This is the same as v1.5.1 with the following two bug fixes:
+  * Fixes DRACO_TRANSCODER_SUPPORTED enabled builds.
+  * ABI version updated.
+
+### Version 1.5.1 release
+* Adds assertion enabled Emscripten builds to the release, and a subset of the
+  assertion enabled builds to GStatic. See the file listing below.
+* Custom paths to third party dependencies are now supported. See BUILDING.md
+  for more information.
+* The CMake configuration file draco-config.cmake is now tested and known to
+  work for using Draco in Linux, MacOS, and Windows CMake projects. See the
+  `install_test` subdirectory of `src/draco/tools` for more information.
+* Bug fixes.
+
+### Version 1.5.0 release
+* Adds the draco_transcoder tool. See the section below on the glTF transcoding
+  tool, and BUILDING.md for build and dependency information.
+* Some changes to configuration variables have been made for this release:
+  - The DRACO_GLTF flag has been renamed to DRACO_GLTF_BITSTREAM to help
+    increase understanding of its purpose, which is to limit Draco features to
+    those included in the Draco glTF specification.
+  - Variables exported in CMake via draco-config.cmake and find-draco.cmake
+    (formerly FindDraco.cmake) have been renamed. It's unlikely that this
+    impacts any existing projects as the aforementioned files were not formed
+    correctly. See [PR775](https://github.com/google/draco/pull/775) for full
+    details of the changes.
+* A CMake version file has been added.
+* The CMake install target now uses absolute paths direct from CMake instead
+  of building them using CMAKE_INSTALL_PREFIX. This was done to make Draco
+  easier to use for downstream packagers and should have little to no impact on
+  users picking up Draco from source.
+* Certain MSVC warnings have had their levels changed via compiler flag to
+  reduce the amount of noise output by the MSVC compilers. Set MSVC warning
+  level to 4, or define DRACO_DEBUG_MSVC_WARNINGS at CMake configuration time
+  to restore previous behavior.
+* Bug fixes.
+
+### Version 1.4.3 release
+* Using the versioned www.gstatic.com WASM and Javascript decoders continues
+  to be recommended. To use v1.4.3, use this URL:
+  * https://www.gstatic.com/draco/versioned/decoders/1.4.3/*
+* Bug fixes
+
 ### Version 1.4.1 release
 * Using the versioned www.gstatic.com WASM and Javascript decoders is now
   recommended. To use v1.4.1, use this URL:
@@ -129,6 +212,7 @@ _**Contents**_
     * [Encoding Tool](#encoding-tool)
     * [Encoding Point Clouds](#encoding-point-clouds)
     * [Decoding Tool](#decoding-tool)
+    * [glTF Transcoding Tool](#gltf-transcoding-tool)
     * [C++ Decoder API](#c-decoder-api)
     * [Javascript Encoder API](#javascript-encoder-api)
     * [Javascript Decoder API](#javascript-decoder-api)
@@ -136,6 +220,7 @@ _**Contents**_
     * [Metadata API](#metadata-api)
     * [NPM Package](#npm-package)
     * [three.js Renderer Example](#threejs-renderer-example)
+  * [GStatic Javascript Builds](#gstatic-javascript-builds)
   * [Support](#support)
   * [License](#license)
   * [References](#references)
@@ -170,16 +255,18 @@ Command Line Applications
 ------------------------
 
 The default target created from the build files will be the `draco_encoder`
-and `draco_decoder` command line applications. For both applications, if you
+and `draco_decoder` command line applications. Additionally, `draco_transcoder`
-run them without any arguments or `-h`, the applications will output usage and
+is generated when CMake is run with the DRACO_TRANSCODER_SUPPORTED variable set
-options.
+to ON (see [BUILDING](BUILDING.md#transcoder) for more details). For all
+applications, if you run them without any arguments or `-h`, the applications
+will output usage and options.
 
 Encoding Tool
 -------------
 
-`draco_encoder` will read OBJ or PLY files as input, and output Draco-encoded
+`draco_encoder` will read OBJ, STL or PLY files as input, and output
-files. We have included Stanford's [Bunny] mesh for testing. The basic command
+Draco-encoded files. We have included Stanford's [Bunny] mesh for testing. The
-line looks like this:
+basic command line looks like this:
 
 ~~~~~ bash
 ./draco_encoder -i testdata/bun_zipper.ply -o out.drc
@@ -232,15 +319,34 @@ and denser point clouds.
 Decoding Tool
 -------------
 
-`draco_decoder` will read Draco files as input, and output OBJ or PLY files.
+`draco_decoder` will read Draco files as input, and output OBJ, STL or PLY
-The basic command line looks like this:
+files. The basic command line looks like this:
 
 ~~~~~ bash
 ./draco_decoder -i in.drc -o out.obj
 ~~~~~
 
+glTF Transcoding Tool
+---------------------
+
+`draco_transcoder` can be used to add Draco compression to glTF assets. The
+basic command line looks like this:
+
+~~~~~ bash
+./draco_transcoder -i in.glb -o out.glb
+~~~~~
+
+This command line will add geometry compression to all meshes in the `in.glb`
+file. Quantization values for different glTF attributes can be specified
+similarly to the `draco_encoder` tool. For example `-qp` can be used to define
+quantization of the position attribute:
+
+~~~~~ bash
+./draco_transcoder -i in.glb -o out.glb -qp 12
+~~~~~
+
 C++ Decoder API
--------------
+---------------
 
 If you'd like to add decoding to your applications you will need to include
 the `draco_dec` library. In order to use the Draco decoder you need to
@@ -442,6 +548,30 @@ Javascript decoder using the `three.js` renderer.
 
 Please see the [javascript/example/README.md](javascript/example/README.md) file for more information.
 
+GStatic Javascript Builds
+=========================
+
+Prebuilt versions of the Emscripten-built Draco javascript decoders are hosted
+on www.gstatic.com in version labeled directories:
+
+https://www.gstatic.com/draco/versioned/decoders/VERSION/*
+
+As of the v1.4.3 release the files available are:
+
+- [draco_decoder.js](https://www.gstatic.com/draco/versioned/decoders/1.4.3/draco_decoder.js)
+- [draco_decoder.wasm](https://www.gstatic.com/draco/versioned/decoders/1.4.3/draco_decoder.wasm)
+- [draco_decoder_gltf.js](https://www.gstatic.com/draco/versioned/decoders/1.4.3/draco_decoder_gltf.js)
+- [draco_decoder_gltf.wasm](https://www.gstatic.com/draco/versioned/decoders/1.4.3/draco_decoder_gltf.wasm)
+- [draco_wasm_wrapper.js](https://www.gstatic.com/draco/versioned/decoders/1.4.3/draco_wasm_wrapper.js)
+- [draco_wasm_wrapper_gltf.js](https://www.gstatic.com/draco/versioned/decoders/1.4.3/draco_wasm_wrapper_gltf.js)
+
+Beginning with the v1.5.1 release assertion enabled builds of the following
+files are available:
+
+- [draco_decoder.js](https://www.gstatic.com/draco/versioned/decoders/1.5.1/with_asserts/draco_decoder.js)
+- [draco_decoder.wasm](https://www.gstatic.com/draco/versioned/decoders/1.5.1/with_asserts/draco_decoder.wasm)
+- [draco_wasm_wrapper.js](https://www.gstatic.com/draco/versioned/decoders/1.5.1/with_asserts/draco_wasm_wrapper.js)
+
 Support
 =======
 

contrib/draco/cmake/DracoConfig.cmake

@@ -1,3 +0,0 @@
-@PACKAGE_INIT@
-set_and_check(draco_INCLUDE_DIR "@PACKAGE_draco_include_install_dir@")
-set_and_check(draco_LIBRARY_DIR "@PACKAGE_draco_lib_install_dir@")

contrib/draco/cmake/FindDraco.cmake

@@ -1,56 +0,0 @@
-# Finddraco
-#
-# Locates draco and sets the following variables:
-#
-# draco_FOUND draco_INCLUDE_DIRS draco_LIBARY_DIRS draco_LIBRARIES
-# draco_VERSION_STRING
-#
-# draco_FOUND is set to YES only when all other variables are successfully
-# configured.
-
-unset(draco_FOUND)
-unset(draco_INCLUDE_DIRS)
-unset(draco_LIBRARY_DIRS)
-unset(draco_LIBRARIES)
-unset(draco_VERSION_STRING)
-
-mark_as_advanced(draco_FOUND)
-mark_as_advanced(draco_INCLUDE_DIRS)
-mark_as_advanced(draco_LIBRARY_DIRS)
-mark_as_advanced(draco_LIBRARIES)
-mark_as_advanced(draco_VERSION_STRING)
-
-set(draco_version_file_no_prefix "draco/src/draco/core/draco_version.h")
-
-# Set draco_INCLUDE_DIRS
-find_path(draco_INCLUDE_DIRS NAMES "${draco_version_file_no_prefix}")
-
-# Extract the version string from draco_version.h.
-if(draco_INCLUDE_DIRS)
-  set(draco_version_file
-      "${draco_INCLUDE_DIRS}/draco/src/draco/core/draco_version.h")
-  file(STRINGS "${draco_version_file}" draco_version REGEX "kdracoVersion")
-  list(GET draco_version 0 draco_version)
-  string(REPLACE "static const char kdracoVersion[] = " "" draco_version
-                 "${draco_version}")
-  string(REPLACE ";" "" draco_version "${draco_version}")
-  string(REPLACE "\"" "" draco_version "${draco_version}")
-  set(draco_VERSION_STRING ${draco_version})
-endif()
-
-# Find the library.
-if(BUILD_SHARED_LIBS)
-  find_library(draco_LIBRARIES NAMES draco.dll libdraco.dylib libdraco.so)
-else()
-  find_library(draco_LIBRARIES NAMES draco.lib libdraco.a)
-endif()
-
-# Store path to library.
-get_filename_component(draco_LIBRARY_DIRS ${draco_LIBRARIES} DIRECTORY)
-
-if(draco_INCLUDE_DIRS
-   AND draco_LIBRARY_DIRS
-   AND draco_LIBRARIES
-   AND draco_VERSION_STRING)
-  set(draco_FOUND YES)
-endif()

contrib/draco/cmake/compiler_flags.cmake

@@ -1,220 +0,0 @@
-if(DRACO_CMAKE_COMPILER_FLAGS_CMAKE_)
-  return()
-endif()
-set(DRACO_CMAKE_COMPILER_FLAGS_CMAKE_ 1)
-
-include(CheckCCompilerFlag)
-include(CheckCXXCompilerFlag)
-include("${draco_root}/cmake/compiler_tests.cmake")
-
-# Strings used to cache failed C/CXX flags.
-set(DRACO_FAILED_C_FLAGS)
-set(DRACO_FAILED_CXX_FLAGS)
-
-# Checks C compiler for support of $c_flag. Adds $c_flag to $CMAKE_C_FLAGS when
-# the compile test passes. Caches $c_flag in $DRACO_FAILED_C_FLAGS when the test
-# fails.
-macro(add_c_flag_if_supported c_flag)
-  unset(C_FLAG_FOUND CACHE)
-  string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
-  unset(C_FLAG_FAILED CACHE)
-  string(FIND "${DRACO_FAILED_C_FLAGS}" "${c_flag}" C_FLAG_FAILED)
-
-  if(${C_FLAG_FOUND} EQUAL -1 AND ${C_FLAG_FAILED} EQUAL -1)
-    unset(C_FLAG_SUPPORTED CACHE)
-    message("Checking C compiler flag support for: " ${c_flag})
-    check_c_compiler_flag("${c_flag}" C_FLAG_SUPPORTED)
-    if(${C_FLAG_SUPPORTED})
-      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${c_flag}" CACHE STRING "")
-    else()
-      set(DRACO_FAILED_C_FLAGS
-          "${DRACO_FAILED_C_FLAGS} ${c_flag}"
-          CACHE STRING "" FORCE)
-    endif()
-  endif()
-endmacro()
-
-# Checks C++ compiler for support of $cxx_flag. Adds $cxx_flag to
-# $CMAKE_CXX_FLAGS when the compile test passes. Caches $c_flag in
-# $DRACO_FAILED_CXX_FLAGS when the test fails.
-macro(add_cxx_flag_if_supported cxx_flag)
-  unset(CXX_FLAG_FOUND CACHE)
-  string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
-  unset(CXX_FLAG_FAILED CACHE)
-  string(FIND "${DRACO_FAILED_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FAILED)
-
-  if(${CXX_FLAG_FOUND} EQUAL -1 AND ${CXX_FLAG_FAILED} EQUAL -1)
-    unset(CXX_FLAG_SUPPORTED CACHE)
-    message("Checking CXX compiler flag support for: " ${cxx_flag})
-    check_cxx_compiler_flag("${cxx_flag}" CXX_FLAG_SUPPORTED)
-    if(${CXX_FLAG_SUPPORTED})
-      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${cxx_flag}" CACHE STRING "")
-    else()
-      set(DRACO_FAILED_CXX_FLAGS
-          "${DRACO_FAILED_CXX_FLAGS} ${cxx_flag}"
-          CACHE STRING "" FORCE)
-    endif()
-  endif()
-endmacro()
-
-# Convenience method for adding a flag to both the C and C++ compiler command
-# lines.
-macro(add_compiler_flag_if_supported flag)
-  add_c_flag_if_supported(${flag})
-  add_cxx_flag_if_supported(${flag})
-endmacro()
-
-# Checks C compiler for support of $c_flag and terminates generation when
-# support is not present.
-macro(require_c_flag c_flag update_c_flags)
-  unset(C_FLAG_FOUND CACHE)
-  string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
-
-  if(${C_FLAG_FOUND} EQUAL -1)
-    unset(HAVE_C_FLAG CACHE)
-    message("Checking C compiler flag support for: " ${c_flag})
-    check_c_compiler_flag("${c_flag}" HAVE_C_FLAG)
-    if(NOT ${HAVE_C_FLAG})
-      message(
-        FATAL_ERROR "${PROJECT_NAME} requires support for C flag: ${c_flag}.")
-    endif()
-    if(${update_c_flags})
-      set(CMAKE_C_FLAGS "${c_flag} ${CMAKE_C_FLAGS}" CACHE STRING "" FORCE)
-    endif()
-  endif()
-endmacro()
-
-# Checks CXX compiler for support of $cxx_flag and terminates generation when
-# support is not present.
-macro(require_cxx_flag cxx_flag update_cxx_flags)
-  unset(CXX_FLAG_FOUND CACHE)
-  string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
-
-  if(${CXX_FLAG_FOUND} EQUAL -1)
-    unset(HAVE_CXX_FLAG CACHE)
-    message("Checking CXX compiler flag support for: " ${cxx_flag})
-    check_cxx_compiler_flag("${cxx_flag}" HAVE_CXX_FLAG)
-    if(NOT ${HAVE_CXX_FLAG})
-      message(
-        FATAL_ERROR
-          "${PROJECT_NAME} requires support for CXX flag: ${cxx_flag}.")
-    endif()
-    if(${update_cxx_flags})
-      set(CMAKE_CXX_FLAGS
-          "${cxx_flag} ${CMAKE_CXX_FLAGS}"
-          CACHE STRING "" FORCE)
-    endif()
-  endif()
-endmacro()
-
-# Checks for support of $flag by both the C and CXX compilers. Terminates
-# generation when support is not present in both compilers.
-macro(require_compiler_flag flag update_cmake_flags)
-  require_c_flag(${flag} ${update_cmake_flags})
-  require_cxx_flag(${flag} ${update_cmake_flags})
-endmacro()
-
-# Checks only non-MSVC targets for support of $c_flag and terminates generation
-# when support is not present.
-macro(require_c_flag_nomsvc c_flag update_c_flags)
-  if(NOT MSVC)
-    require_c_flag(${c_flag} ${update_c_flags})
-  endif()
-endmacro()
-
-# Checks only non-MSVC targets for support of $cxx_flag and terminates
-# generation when support is not present.
-macro(require_cxx_flag_nomsvc cxx_flag update_cxx_flags)
-  if(NOT MSVC)
-    require_cxx_flag(${cxx_flag} ${update_cxx_flags})
-  endif()
-endmacro()
-
-# Checks only non-MSVC targets for support of $flag by both the C and CXX
-# compilers. Terminates generation when support is not present in both
-# compilers.
-macro(require_compiler_flag_nomsvc flag update_cmake_flags)
-  require_c_flag_nomsvc(${flag} ${update_cmake_flags})
-  require_cxx_flag_nomsvc(${flag} ${update_cmake_flags})
-endmacro()
-
-# Adds $flag to assembler command line.
-macro(append_as_flag flag)
-  unset(AS_FLAG_FOUND CACHE)
-  string(FIND "${DRACO_AS_FLAGS}" "${flag}" AS_FLAG_FOUND)
-
-  if(${AS_FLAG_FOUND} EQUAL -1)
-    set(DRACO_AS_FLAGS "${DRACO_AS_FLAGS} ${flag}")
-  endif()
-endmacro()
-
-# Adds $flag to the C compiler command line.
-macro(append_c_flag flag)
-  unset(C_FLAG_FOUND CACHE)
-  string(FIND "${CMAKE_C_FLAGS}" "${flag}" C_FLAG_FOUND)
-
-  if(${C_FLAG_FOUND} EQUAL -1)
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}")
-  endif()
-endmacro()
-
-# Adds $flag to the CXX compiler command line.
-macro(append_cxx_flag flag)
-  unset(CXX_FLAG_FOUND CACHE)
-  string(FIND "${CMAKE_CXX_FLAGS}" "${flag}" CXX_FLAG_FOUND)
-
-  if(${CXX_FLAG_FOUND} EQUAL -1)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
-  endif()
-endmacro()
-
-# Adds $flag to the C and CXX compiler command lines.
-macro(append_compiler_flag flag)
-  append_c_flag(${flag})
-  append_cxx_flag(${flag})
-endmacro()
-
-# Adds $flag to the executable linker command line.
-macro(append_exe_linker_flag flag)
-  unset(LINKER_FLAG_FOUND CACHE)
-  string(FIND "${CMAKE_EXE_LINKER_FLAGS}" "${flag}" LINKER_FLAG_FOUND)
-
-  if(${LINKER_FLAG_FOUND} EQUAL -1)
-    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${flag}")
-  endif()
-endmacro()
-
-# Adds $flag to the link flags for $target.
-function(append_link_flag_to_target target flags)
-  unset(target_link_flags)
-  get_target_property(target_link_flags ${target} LINK_FLAGS)
-
-  if(target_link_flags)
-    unset(link_flag_found)
-    string(FIND "${target_link_flags}" "${flags}" link_flag_found)
-
-    if(NOT ${link_flag_found} EQUAL -1)
-      return()
-    endif()
-
-    set(target_link_flags "${target_link_flags} ${flags}")
-  else()
-    set(target_link_flags "${flags}")
-  endif()
-
-  set_target_properties(${target} PROPERTIES LINK_FLAGS ${target_link_flags})
-endfunction()
-
-# Adds $flag to executable linker flags, and makes sure C/CXX builds still work.
-macro(require_linker_flag flag)
-  append_exe_linker_flag(${flag})
-
-  unset(c_passed)
-  draco_check_c_compiles("LINKER_FLAG_C_TEST(${flag})" "" c_passed)
-  unset(cxx_passed)
-  draco_check_cxx_compiles("LINKER_FLAG_CXX_TEST(${flag})" "" cxx_passed)
-
-  if(NOT c_passed OR NOT cxx_passed)
-    message(FATAL_ERROR "Linker flag test for ${flag} failed.")
-  endif()
-endmacro()

contrib/draco/cmake/compiler_tests.cmake

@@ -1,103 +0,0 @@
-if(DRACO_CMAKE_COMPILER_TESTS_CMAKE_)
-  return()
-endif()
-set(DRACO_CMAKE_COMPILER_TESTS_CMAKE_ 1)
-
-include(CheckCSourceCompiles)
-include(CheckCXXSourceCompiles)
-
-# The basic main() macro used in all compile tests.
-set(DRACO_C_MAIN "\nint main(void) { return 0; }")
-set(DRACO_CXX_MAIN "\nint main() { return 0; }")
-
-# Strings containing the names of passed and failed tests.
-set(DRACO_C_PASSED_TESTS)
-set(DRACO_C_FAILED_TESTS)
-set(DRACO_CXX_PASSED_TESTS)
-set(DRACO_CXX_FAILED_TESTS)
-
-macro(draco_push_var var new_value)
-  set(SAVED_${var} ${var})
-  set(${var} ${new_value})
-endmacro()
-
-macro(draco_pop_var var)
-  set(var ${SAVED_${var}})
-  unset(SAVED_${var})
-endmacro()
-
-# Confirms $test_source compiles and stores $test_name in one of
-# $DRACO_C_PASSED_TESTS or $DRACO_C_FAILED_TESTS depending on out come. When the
-# test passes $result_var is set to 1. When it fails $result_var is unset. The
-# test is not run if the test name is found in either of the passed or failed
-# test variables.
-macro(draco_check_c_compiles test_name test_source result_var)
-  unset(C_TEST_PASSED CACHE)
-  unset(C_TEST_FAILED CACHE)
-  string(FIND "${DRACO_C_PASSED_TESTS}" "${test_name}" C_TEST_PASSED)
-  string(FIND "${DRACO_C_FAILED_TESTS}" "${test_name}" C_TEST_FAILED)
-  if(${C_TEST_PASSED} EQUAL -1 AND ${C_TEST_FAILED} EQUAL -1)
-    unset(C_TEST_COMPILED CACHE)
-    message("Running C compiler test: ${test_name}")
-    check_c_source_compiles("${test_source} ${DRACO_C_MAIN}" C_TEST_COMPILED)
-    set(${result_var} ${C_TEST_COMPILED})
-
-    if(${C_TEST_COMPILED})
-      set(DRACO_C_PASSED_TESTS "${DRACO_C_PASSED_TESTS} ${test_name}")
-    else()
-      set(DRACO_C_FAILED_TESTS "${DRACO_C_FAILED_TESTS} ${test_name}")
-      message("C Compiler test ${test_name} failed.")
-    endif()
-  elseif(NOT ${C_TEST_PASSED} EQUAL -1)
-    set(${result_var} 1)
-  else() # ${C_TEST_FAILED} NOT EQUAL -1
-    unset(${result_var})
-  endif()
-endmacro()
-
-# Confirms $test_source compiles and stores $test_name in one of
-# $DRACO_CXX_PASSED_TESTS or $DRACO_CXX_FAILED_TESTS depending on out come. When
-# the test passes $result_var is set to 1. When it fails $result_var is unset.
-# The test is not run if the test name is found in either of the passed or
-# failed test variables.
-macro(draco_check_cxx_compiles test_name test_source result_var)
-  unset(CXX_TEST_PASSED CACHE)
-  unset(CXX_TEST_FAILED CACHE)
-  string(FIND "${DRACO_CXX_PASSED_TESTS}" "${test_name}" CXX_TEST_PASSED)
-  string(FIND "${DRACO_CXX_FAILED_TESTS}" "${test_name}" CXX_TEST_FAILED)
-  if(${CXX_TEST_PASSED} EQUAL -1 AND ${CXX_TEST_FAILED} EQUAL -1)
-    unset(CXX_TEST_COMPILED CACHE)
-    message("Running CXX compiler test: ${test_name}")
-    check_cxx_source_compiles("${test_source} ${DRACO_CXX_MAIN}"
-                              CXX_TEST_COMPILED)
-    set(${result_var} ${CXX_TEST_COMPILED})
-
-    if(${CXX_TEST_COMPILED})
-      set(DRACO_CXX_PASSED_TESTS "${DRACO_CXX_PASSED_TESTS} ${test_name}")
-    else()
-      set(DRACO_CXX_FAILED_TESTS "${DRACO_CXX_FAILED_TESTS} ${test_name}")
-      message("CXX Compiler test ${test_name} failed.")
-    endif()
-  elseif(NOT ${CXX_TEST_PASSED} EQUAL -1)
-    set(${result_var} 1)
-  else() # ${CXX_TEST_FAILED} NOT EQUAL -1
-    unset(${result_var})
-  endif()
-endmacro()
-
-# Convenience macro that confirms $test_source compiles as C and C++.
-# $result_var is set to 1 when both tests are successful, and 0 when one or both
-# tests fail. Note: This macro is intended to be used to write to result
-# variables that are expanded via configure_file(). $result_var is set to 1 or 0
-# to allow direct usage of the value in generated source files.
-macro(draco_check_source_compiles test_name test_source result_var)
-  unset(C_PASSED)
-  unset(CXX_PASSED)
-  draco_check_c_compiles(${test_name} ${test_source} C_PASSED)
-  draco_check_cxx_compiles(${test_name} ${test_source} CXX_PASSED)
-  if(${C_PASSED} AND ${CXX_PASSED})
-    set(${result_var} 1)
-  else()
-    set(${result_var} 0)
-  endif()
-endmacro()

contrib/draco/cmake/draco-config.cmake.template

@@ -1,2 +1,3 @@
-set(DRACO_INCLUDE_DIRS "@DRACO_INCLUDE_DIRS@")
+@PACKAGE_INIT@
-set(DRACO_LIBRARIES "draco")
+
+include("${CMAKE_CURRENT_LIST_DIR}/draco-targets.cmake")

contrib/draco/cmake/draco.pc.template

@@ -1,11 +1,6 @@
-prefix=@prefix@
-exec_prefix=@exec_prefix@
-libdir=@libdir@
-includedir=@includedir@
-
 Name: @PROJECT_NAME@
 Description: Draco geometry de(com)pression library.
 Version: @DRACO_VERSION@
-Cflags: -I${includedir}
+Cflags: -I@includes_path@
-Libs: -L${libdir} -ldraco
+Libs: -L@libs_path@ -ldraco
 Libs.private: @CMAKE_THREAD_LIBS_INIT@

contrib/draco/cmake/draco_build_definitions.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_BUILD_DEFINITIONS_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_BUILD_DEFINITIONS_CMAKE_
@@ -17,10 +31,6 @@ macro(set_draco_target)
     endif()
     set(draco_plugin_dependency draco_static)
   endif()
-
-  if(BUILD_SHARED_LIBS)
-    set(CMAKE_POSITION_INDEPENDENT_CODE ON)
-  endif()
 endmacro()
 
 # Configures flags and sets build system globals.
@@ -36,23 +46,37 @@ macro(draco_set_build_definitions)
   endif()
 
   draco_load_version_info()
-  set(DRACO_SOVERSION 1)
+
+  # Library version info. See the libtool docs for updating the values:
+  # https://www.gnu.org/software/libtool/manual/libtool.html#Updating-version-info
+  #
+  # c=<current>, r=<revision>, a=<age>
+  #
+  # libtool generates a .so file as .so.[c-a].a.r, while -version-info c:r:a is
+  # passed to libtool.
+  #
+  # We set DRACO_SOVERSION = [c-a].a.r
+  set(LT_CURRENT 8)
+  set(LT_REVISION 0)
+  set(LT_AGE 0)
+  math(EXPR DRACO_SOVERSION_MAJOR "${LT_CURRENT} - ${LT_AGE}")
+  set(DRACO_SOVERSION "${DRACO_SOVERSION_MAJOR}.${LT_AGE}.${LT_REVISION}")
+  unset(LT_CURRENT)
+  unset(LT_REVISION)
+  unset(LT_AGE)
 
   list(APPEND draco_include_paths "${draco_root}" "${draco_root}/src"
               "${draco_build}")
 
-  if(DRACO_ABSL)
+  if(DRACO_TRANSCODER_SUPPORTED)
-    list(APPEND draco_include_path "${draco_root}/third_party/abseil-cpp")
+    draco_setup_eigen()
+    draco_setup_filesystem()
+    draco_setup_tinygltf()
+
+
   endif()
 
 
-  list(APPEND draco_gtest_include_paths
-              "${draco_root}/../googletest/googlemock/include"
-              "${draco_root}/../googletest/googlemock"
-              "${draco_root}/../googletest/googletest/include"
-              "${draco_root}/../googletest/googletest")
-  list(APPEND draco_test_include_paths ${draco_include_paths}
-              ${draco_gtest_include_paths})
   list(APPEND draco_defines "DRACO_CMAKE=1"
               "DRACO_FLAGS_SRCDIR=\"${draco_root}\""
               "DRACO_FLAGS_TMPDIR=\"/tmp\"")
@@ -63,11 +87,22 @@ macro(draco_set_build_definitions)
     if(BUILD_SHARED_LIBS)
       set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
     endif()
-  else()
+  endif()
+
+  if(NOT MSVC)
     if(${CMAKE_SIZEOF_VOID_P} EQUAL 8)
       # Ensure 64-bit platforms can support large files.
       list(APPEND draco_defines "_LARGEFILE_SOURCE" "_FILE_OFFSET_BITS=64")
     endif()
+
+    if(NOT DRACO_DEBUG_COMPILER_WARNINGS)
+      if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+        list(APPEND draco_clang_cxx_flags
+                    "-Wno-implicit-const-int-float-conversion")
+      else()
+        list(APPEND draco_base_cxx_flags "-Wno-deprecated-declarations")
+      endif()
+    endif()
   endif()
 
   if(ANDROID)
@@ -102,13 +137,9 @@ macro(draco_set_build_definitions)
   set(draco_neon_source_file_suffix "neon.cc")
   set(draco_sse4_source_file_suffix "sse4.cc")
 
-  if((${CMAKE_CXX_COMPILER_ID}
+  if((${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU" AND ${CMAKE_CXX_COMPILER_VERSION}
-      STREQUAL
+                                                  VERSION_LESS 5)
-      "GNU"
+     OR (${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang"
-      AND ${CMAKE_CXX_COMPILER_VERSION} VERSION_LESS 5)
-     OR (${CMAKE_CXX_COMPILER_ID}
-         STREQUAL
-         "Clang"
          AND ${CMAKE_CXX_COMPILER_VERSION} VERSION_LESS 4))
     message(
       WARNING "GNU/GCC < v5 or Clang/LLVM < v4, ENABLING COMPATIBILITY MODE.")
@@ -117,7 +148,9 @@ macro(draco_set_build_definitions)
 
   if(EMSCRIPTEN)
     draco_check_emscripten_environment()
-    draco_get_required_emscripten_flags(FLAG_LIST_VAR draco_base_cxx_flags)
+    draco_get_required_emscripten_flags(
+      FLAG_LIST_VAR_COMPILER draco_base_cxx_flags
+      FLAG_LIST_VAR_LINKER draco_base_exe_linker_flags)
   endif()
 
   draco_configure_sanitizer()

contrib/draco/cmake/draco_cpu_detection.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_CPU_DETECTION_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_CPU_DETECTION_CMAKE_

contrib/draco/cmake/draco_dependencies.cmake

@@ -0,0 +1,136 @@
+# Copyright 2022 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+if(DRACO_CMAKE_DRACO_DEPENDENCIES_CMAKE)
+  return()
+endif()
+set(DRACO_CMAKE_DRACO_DEPENDENCIES_CMAKE 1)
+
+include("${draco_root}/cmake/draco_variables.cmake")
+
+# Each variable holds a user specified custom path to a local copy of the
+# sources that belong to each project that Draco depends on. When paths are
+# empty the build will be generated pointing to the Draco git submodules.
+# Otherwise the paths specified by the user will be used in the build
+# configuration.
+
+# Path to the Eigen. The path must contain the Eigen directory.
+set(DRACO_EIGEN_PATH)
+draco_track_configuration_variable(DRACO_EIGEN_PATH)
+
+# Path to the gulrak/filesystem installation. The path specified must contain
+# the ghc subdirectory that houses the filesystem includes.
+set(DRACO_FILESYSTEM_PATH)
+draco_track_configuration_variable(DRACO_FILESYSTEM_PATH)
+
+# Path to the googletest installation. The path must be to the root of the
+# Googletest project directory.
+set(DRACO_GOOGLETEST_PATH)
+draco_track_configuration_variable(DRACO_GOOGLETEST_PATH)
+
+# Path to the syoyo/tinygltf installation. The path must be to the root of the
+# project directory.
+set(DRACO_TINYGLTF_PATH)
+draco_track_configuration_variable(DRACO_TINYGLTF_PATH)
+
+# Utility macro for killing the build due to a missing submodule directory.
+macro(draco_die_missing_submodule dir)
+  message(FATAL_ERROR "${dir} missing, run git submodule update --init")
+endmacro()
+
+# Determines the Eigen location and updates the build configuration accordingly.
+macro(draco_setup_eigen)
+  if(DRACO_EIGEN_PATH)
+    set(eigen_path "${DRACO_EIGEN_PATH}")
+
+    if(NOT IS_DIRECTORY "${eigen_path}")
+      message(FATAL_ERROR "DRACO_EIGEN_PATH does not exist.")
+    endif()
+  else()
+    set(eigen_path "${draco_root}/third_party/eigen")
+
+    if(NOT IS_DIRECTORY "${eigen_path}")
+      draco_die_missing_submodule("${eigen_path}")
+    endif()
+  endif()
+
+  set(eigen_include_path "${eigen_path}/Eigen")
+
+  if(NOT EXISTS "${eigen_path}/Eigen")
+    message(FATAL_ERROR "The eigen path does not contain an Eigen directory.")
+  endif()
+
+  list(APPEND draco_include_paths "${eigen_path}")
+endmacro()
+
+# Determines the gulrak/filesystem location and updates the build configuration
+# accordingly.
+macro(draco_setup_filesystem)
+  if(DRACO_FILESYSTEM_PATH)
+    set(fs_path "${DRACO_FILESYSTEM_PATH}")
+
+    if(NOT IS_DIRECTORY "${fs_path}")
+      message(FATAL_ERROR "DRACO_FILESYSTEM_PATH does not exist.")
+    endif()
+  else()
+    set(fs_path "${draco_root}/third_party/filesystem/include")
+
+    if(NOT IS_DIRECTORY "${fs_path}")
+      draco_die_missing_submodule("${fs_path}")
+    endif()
+  endif()
+
+  list(APPEND draco_include_paths "${fs_path}")
+endmacro()
+
+# Determines the Googletest location and sets up include and source list vars
+# for the draco_tests build.
+macro(draco_setup_googletest)
+  if(DRACO_GOOGLETEST_PATH)
+    set(gtest_path "${DRACO_GOOGLETEST_PATH}")
+    if(NOT IS_DIRECTORY "${gtest_path}")
+      message(FATAL_ERROR "DRACO_GOOGLETEST_PATH does not exist.")
+    endif()
+  else()
+    set(gtest_path "${draco_root}/third_party/googletest")
+  endif()
+
+  list(APPEND draco_test_include_paths ${draco_include_paths}
+              "${gtest_path}/include" "${gtest_path}/googlemock"
+              "${gtest_path}/googletest/include" "${gtest_path}/googletest")
+
+  list(APPEND draco_gtest_all "${gtest_path}/googletest/src/gtest-all.cc")
+  list(APPEND draco_gtest_main "${gtest_path}/googletest/src/gtest_main.cc")
+endmacro()
+
+
+# Determines the location of TinyGLTF and updates the build configuration
+# accordingly.
+macro(draco_setup_tinygltf)
+  if(DRACO_TINYGLTF_PATH)
+    set(tinygltf_path "${DRACO_TINYGLTF_PATH}")
+
+    if(NOT IS_DIRECTORY "${tinygltf_path}")
+      message(FATAL_ERROR "DRACO_TINYGLTF_PATH does not exist.")
+    endif()
+  else()
+    set(tinygltf_path "${draco_root}/third_party/tinygltf")
+
+    if(NOT IS_DIRECTORY "${tinygltf_path}")
+      draco_die_missing_submodule("${tinygltf_path}")
+    endif()
+  endif()
+
+  list(APPEND draco_include_paths "${tinygltf_path}")
+endmacro()

contrib/draco/cmake/draco_emscripten.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_EMSCRIPTEN_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_EMSCRIPTEN_CMAKE_
@@ -18,39 +32,64 @@ endmacro()
 
 # Obtains the required Emscripten flags for Draco targets.
 macro(draco_get_required_emscripten_flags)
-  set(em_FLAG_LIST_VAR)
+  set(em_FLAG_LIST_VAR_COMPILER)
+  set(em_FLAG_LIST_VAR_LINKER)
   set(em_flags)
-  set(em_single_arg_opts FLAG_LIST_VAR)
+  set(em_single_arg_opts FLAG_LIST_VAR_COMPILER FLAG_LIST_VAR_LINKER)
   set(em_multi_arg_opts)
   cmake_parse_arguments(em "${em_flags}" "${em_single_arg_opts}"
                         "${em_multi_arg_opts}" ${ARGN})
-  if(NOT em_FLAG_LIST_VAR)
+  if(NOT em_FLAG_LIST_VAR_COMPILER)
-    message(FATAL "draco_get_required_emscripten_flags: FLAG_LIST_VAR required")
+    message(
+      FATAL
+      "draco_get_required_emscripten_flags: FLAG_LIST_VAR_COMPILER required")
+  endif()
+
+  if(NOT em_FLAG_LIST_VAR_LINKER)
+    message(
+      FATAL
+      "draco_get_required_emscripten_flags: FLAG_LIST_VAR_LINKER required")
   endif()
 
   if(DRACO_JS_GLUE)
     unset(required_flags)
-    list(APPEND ${em_FLAG_LIST_VAR} "-sALLOW_MEMORY_GROWTH=1")
+    # TODO(tomfinegan): Revisit splitting of compile/link flags for Emscripten,
-    list(APPEND ${em_FLAG_LIST_VAR} "-Wno-almost-asm")
+    # and drop -Wno-unused-command-line-argument. Emscripten complains about
-    list(APPEND ${em_FLAG_LIST_VAR} "--memory-init-file" "0")
+    # what are supposedly link-only flags sent with compile commands, but then
-    list(APPEND ${em_FLAG_LIST_VAR} "-fno-omit-frame-pointer")
+    # proceeds to produce broken code if the warnings are heeded.
-    list(APPEND ${em_FLAG_LIST_VAR} "-sMODULARIZE=1")
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER}
-    list(APPEND ${em_FLAG_LIST_VAR} "-sNO_FILESYSTEM=1")
+                "-Wno-unused-command-line-argument")
-    list(APPEND ${em_FLAG_LIST_VAR} "-sEXPORTED_RUNTIME_METHODS=[]")
+
-    list(APPEND ${em_FLAG_LIST_VAR} "-sPRECISE_F32=1")
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-Wno-almost-asm")
-    list(APPEND ${em_FLAG_LIST_VAR} "-sNODEJS_CATCH_EXIT=0")
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "--memory-init-file" "0")
-    list(APPEND ${em_FLAG_LIST_VAR} "-sNODEJS_CATCH_REJECTION=0")
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-fno-omit-frame-pointer")
+
+    # According to Emscripten the following flags are linker only, but sending
+    # these flags (en masse) to only the linker results in a broken Emscripten
+    # build with an empty DracoDecoderModule.
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-sALLOW_MEMORY_GROWTH=1")
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-sMODULARIZE=1")
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-sFILESYSTEM=0")
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER}
+                "-sEXPORTED_FUNCTIONS=[\"_free\",\"_malloc\"]")
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-sPRECISE_F32=1")
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-sNODEJS_CATCH_EXIT=0")
+    list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-sNODEJS_CATCH_REJECTION=0")
 
     if(DRACO_FAST)
-      list(APPEND ${em_FLAG_LIST_VAR} "--llvm-lto" "1")
+      list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "--llvm-lto" "1")
     endif()
+
+    # The WASM flag is reported as linker only.
     if(DRACO_WASM)
-      list(APPEND ${em_FLAG_LIST_VAR} "-sWASM=1")
+      list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-sWASM=1")
     else()
-      list(APPEND ${em_FLAG_LIST_VAR} "-sWASM=0")
+      list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-sWASM=0")
     endif()
+
+    # The LEGACY_VM_SUPPORT flag is reported as linker only.
     if(DRACO_IE_COMPATIBLE)
-      list(APPEND ${em_FLAG_LIST_VAR} "-sLEGACY_VM_SUPPORT=1")
+      list(APPEND ${em_FLAG_LIST_VAR_COMPILER} "-sLEGACY_VM_SUPPORT=1")
     endif()
   endif()
 endmacro()
@@ -66,9 +105,10 @@ macro(draco_generate_emscripten_glue)
                         "${glue_multi_arg_opts}" ${ARGN})
 
   if(DRACO_VERBOSE GREATER 1)
-    message("--------- draco_generate_emscripten_glue -----------\n"
+    message(
+      "--------- draco_generate_emscripten_glue -----------\n"
       "glue_INPUT_IDL=${glue_INPUT_IDL}\n"
-            "glue_OUTPUT_PATH=${glue_OUTPUT_PATH}\n" ]
+      "glue_OUTPUT_PATH=${glue_OUTPUT_PATH}\n"
       "----------------------------------------------------\n")
   endif()
 
@@ -79,17 +119,17 @@ macro(draco_generate_emscripten_glue)
   endif()
 
   # Generate the glue source.
-  execute_process(COMMAND ${PYTHON_EXECUTABLE}
+  execute_process(
-                          $ENV{EMSCRIPTEN}/tools/webidl_binder.py
+    COMMAND ${PYTHON_EXECUTABLE} $ENV{EMSCRIPTEN}/tools/webidl_binder.py
             ${glue_INPUT_IDL} ${glue_OUTPUT_PATH})
   if(NOT EXISTS "${glue_OUTPUT_PATH}.cpp")
     message(FATAL_ERROR "JS glue generation failed for ${glue_INPUT_IDL}.")
   endif()
 
   # Create a dependency so that it regenerated on edits.
-  add_custom_command(OUTPUT "${glue_OUTPUT_PATH}.cpp"
+  add_custom_command(
-                     COMMAND ${PYTHON_EXECUTABLE}
+    OUTPUT "${glue_OUTPUT_PATH}.cpp"
-                             $ENV{EMSCRIPTEN}/tools/webidl_binder.py
+    COMMAND ${PYTHON_EXECUTABLE} $ENV{EMSCRIPTEN}/tools/webidl_binder.py
             ${glue_INPUT_IDL} ${glue_OUTPUT_PATH}
     DEPENDS ${draco_js_dec_idl}
     COMMENT "Generating ${glue_OUTPUT_PATH}.cpp."
@@ -120,8 +160,14 @@ macro(draco_add_emscripten_executable)
   unset(emexe_LINK_FLAGS)
   set(optional_args)
   set(single_value_args NAME GLUE_PATH)
-  set(multi_value_args SOURCES DEFINES FEATURES INCLUDES LINK_FLAGS
+  set(multi_value_args
-                       PRE_LINK_JS_SOURCES POST_LINK_JS_SOURCES)
+      SOURCES
+      DEFINES
+      FEATURES
+      INCLUDES
+      LINK_FLAGS
+      PRE_LINK_JS_SOURCES
+      POST_LINK_JS_SOURCES)
 
   cmake_parse_arguments(emexe "${optional_args}" "${single_value_args}"
                         "${multi_value_args}" ${ARGN})
@@ -136,7 +182,8 @@ macro(draco_add_emscripten_executable)
   endif()
 
   if(DRACO_VERBOSE GREATER 1)
-    message("--------- draco_add_emscripten_executable ---------\n"
+    message(
+      "--------- draco_add_emscripten_executable ---------\n"
       "emexe_NAME=${emexe_NAME}\n"
       "emexe_SOURCES=${emexe_SOURCES}\n"
       "emexe_DEFINES=${emexe_DEFINES}\n"
@@ -153,30 +200,30 @@ macro(draco_add_emscripten_executable)
   # passed in with the target.
   list(APPEND emexe_LINK_FLAGS ${DRACO_CXX_FLAGS})
 
-  if(DRACO_GLTF)
+  if(DRACO_GLTF_BITSTREAM)
-    draco_add_executable(NAME
+    # Add "_gltf" suffix to target output name.
-                         ${emexe_NAME}
+    draco_add_executable(
-                         OUTPUT_NAME
+      NAME ${emexe_NAME}
-                         ${emexe_NAME}_gltf
+      OUTPUT_NAME ${emexe_NAME}_gltf
-                         SOURCES
+      SOURCES ${emexe_SOURCES}
-                         ${emexe_SOURCES}
+      DEFINES ${emexe_DEFINES}
-                         DEFINES
+      INCLUDES ${emexe_INCLUDES}
-                         ${emexe_DEFINES}
+      LINK_FLAGS ${emexe_LINK_FLAGS})
-                         INCLUDES
-                         ${emexe_INCLUDES}
-                         LINK_FLAGS
-                         ${emexe_LINK_FLAGS})
   else()
-    draco_add_executable(NAME ${emexe_NAME} SOURCES ${emexe_SOURCES} DEFINES
+    draco_add_executable(
-                         ${emexe_DEFINES} INCLUDES ${emexe_INCLUDES} LINK_FLAGS
+      NAME ${emexe_NAME}
-                         ${emexe_LINK_FLAGS})
+      SOURCES ${emexe_SOURCES}
+      DEFINES ${emexe_DEFINES}
+      INCLUDES ${emexe_INCLUDES}
+      LINK_FLAGS ${emexe_LINK_FLAGS})
   endif()
 
   foreach(feature ${emexe_FEATURES})
     draco_enable_feature(FEATURE ${feature} TARGETS ${emexe_NAME})
   endforeach()
 
-  set_property(SOURCE ${emexe_SOURCES}
+  set_property(
+    SOURCE ${emexe_SOURCES}
     APPEND
     PROPERTY OBJECT_DEPENDS "${emexe_GLUE_PATH}.cpp")
   em_link_pre_js(${emexe_NAME} ${emexe_PRE_LINK_JS_SOURCES})

contrib/draco/cmake/draco_flags.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_FLAGS_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_FLAGS_CMAKE_
@@ -85,8 +99,8 @@ macro(draco_test_cxx_flag)
   # are passed as a list it will remove the list separators, and attempt to run
   # a compile command using list entries concatenated together as a single
   # argument. Avoid the problem by forcing the argument to be a string.
-  draco_set_and_stringify(SOURCE_VARS all_cxx_flags DEST all_cxx_flags)
+  draco_set_and_stringify(SOURCE_VARS all_cxx_flags DEST all_cxx_flags_string)
-  check_cxx_compiler_flag("${all_cxx_flags}" draco_all_cxx_flags_pass)
+  check_cxx_compiler_flag("${all_cxx_flags_string}" draco_all_cxx_flags_pass)
 
   if(cxx_test_FLAG_REQUIRED AND NOT draco_all_cxx_flags_pass)
     draco_die("Flag test failed for required flag(s): "
@@ -245,3 +259,34 @@ macro(draco_set_cxx_flags)
     draco_test_cxx_flag(FLAG_LIST_VAR_NAMES ${cxx_flag_lists})
   endif()
 endmacro()
+
+# Collects Draco built-in and user-specified linker flags and tests them. Halts
+# configuration and reports the error when any flags cause the build to fail.
+#
+# Note: draco_test_exe_linker_flag() does the real work of setting the flags and
+# running the test compile commands.
+macro(draco_set_exe_linker_flags)
+  unset(linker_flag_lists)
+
+  if(DRACO_VERBOSE)
+    message("draco_set_exe_linker_flags: "
+            "draco_base_exe_linker_flags=${draco_base_exe_linker_flags}")
+  endif()
+
+  if(draco_base_exe_linker_flags)
+    list(APPEND linker_flag_lists draco_base_exe_linker_flags)
+  endif()
+
+  if(linker_flag_lists)
+    unset(test_linker_flags)
+
+    if(DRACO_VERBOSE)
+      message("draco_set_exe_linker_flags: "
+              "linker_flag_lists=${linker_flag_lists}")
+    endif()
+
+    draco_set_and_stringify(DEST test_linker_flags SOURCE_VARS
+                            ${linker_flag_lists})
+    draco_test_exe_linker_flag(FLAG_LIST_VAR_NAME test_linker_flags)
+  endif()
+endmacro()

contrib/draco/cmake/draco_helpers.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_HELPERS_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_HELPERS_CMAKE_

contrib/draco/cmake/draco_install.cmake

@@ -1,32 +1,32 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_INSTALL_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_INSTALL_CMAKE_
 set(DRACO_CMAKE_DRACO_INSTALL_CMAKE_ 1)
 
+include(CMakePackageConfigHelpers)
+include(GNUInstallDirs)
+
 # Sets up the draco install targets. Must be called after the static library
 # target is created.
 macro(draco_setup_install_target)
-  include(GNUInstallDirs)
+  set(bin_path "${CMAKE_INSTALL_BINDIR}")
-
+  set(data_path "${CMAKE_INSTALL_DATAROOTDIR}")
-  # pkg-config: draco.pc
+  set(includes_path "${CMAKE_INSTALL_INCLUDEDIR}")
-  set(prefix "${CMAKE_INSTALL_PREFIX}")
+  set(libs_path "${CMAKE_INSTALL_LIBDIR}")
-  set(exec_prefix "\${prefix}")
-  set(libdir "\${prefix}/${CMAKE_INSTALL_LIBDIR}")
-  set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
-  set(draco_lib_name "draco")
-
-  configure_file("${draco_root}/cmake/draco.pc.template"
-                 "${draco_build}/draco.pc" @ONLY NEWLINE_STYLE UNIX)
-  install(FILES "${draco_build}/draco.pc"
-          DESTINATION "${prefix}/${CMAKE_INSTALL_LIBDIR}/pkgconfig")
-
-  # CMake config: draco-config.cmake
-  set(DRACO_INCLUDE_DIRS "${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
-  configure_file("${draco_root}/cmake/draco-config.cmake.template"
-                 "${draco_build}/draco-config.cmake" @ONLY NEWLINE_STYLE UNIX)
-  install(
-    FILES "${draco_build}/draco-config.cmake"
-    DESTINATION "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATAROOTDIR}/cmake")
 
   foreach(file ${draco_sources})
     if(file MATCHES "h$")
@@ -34,46 +34,88 @@ macro(draco_setup_install_target)
     endif()
   endforeach()
 
+  list(REMOVE_DUPLICATES draco_api_includes)
+
   # Strip $draco_src_root from the file paths: we need to install relative to
   # $include_directory.
   list(TRANSFORM draco_api_includes REPLACE "${draco_src_root}/" "")
-  set(include_directory "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
 
   foreach(draco_api_include ${draco_api_includes})
     get_filename_component(file_directory ${draco_api_include} DIRECTORY)
-    set(target_directory "${include_directory}/draco/${file_directory}")
+    set(target_directory "${includes_path}/draco/${file_directory}")
     install(FILES ${draco_src_root}/${draco_api_include}
             DESTINATION "${target_directory}")
   endforeach()
 
-  install(
+  install(FILES "${draco_build}/draco/draco_features.h"
-    FILES "${draco_build}/draco/draco_features.h"
+          DESTINATION "${includes_path}/draco/")
-    DESTINATION "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}/draco/")
 
-  install(TARGETS draco_decoder DESTINATION
+  install(TARGETS draco_decoder DESTINATION "${bin_path}")
-                  "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}")
+  install(TARGETS draco_encoder DESTINATION "${bin_path}")
-  install(TARGETS draco_encoder DESTINATION
+
-                  "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}")
+  if(DRACO_TRANSCODER_SUPPORTED)
+    install(TARGETS draco_transcoder DESTINATION "${bin_path}")
+  endif()
 
   if(MSVC)
-    install(TARGETS draco DESTINATION
+    install(
-                    "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
+      TARGETS draco
+      EXPORT dracoExport
+      RUNTIME DESTINATION "${bin_path}"
+      ARCHIVE DESTINATION "${libs_path}"
+      LIBRARY DESTINATION "${libs_path}")
   else()
-    install(TARGETS draco_static DESTINATION
+    install(
-                    "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
+      TARGETS draco_static
+      EXPORT dracoExport
+      DESTINATION "${libs_path}")
+
     if(BUILD_SHARED_LIBS)
-      install(TARGETS draco_shared DESTINATION
+      install(
-                      "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
+        TARGETS draco_shared
+        EXPORT dracoExport
+        RUNTIME DESTINATION "${bin_path}"
+        ARCHIVE DESTINATION "${libs_path}"
+        LIBRARY DESTINATION "${libs_path}")
     endif()
   endif()
 
   if(DRACO_UNITY_PLUGIN)
-    install(TARGETS dracodec_unity DESTINATION
+    install(TARGETS dracodec_unity DESTINATION "${libs_path}")
-                    "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
-  endif()
-  if(DRACO_MAYA_PLUGIN)
-    install(TARGETS draco_maya_wrapper DESTINATION
-                    "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
   endif()
 
+  if(DRACO_MAYA_PLUGIN)
+    install(TARGETS draco_maya_wrapper DESTINATION "${libs_path}")
+  endif()
+
+  # pkg-config: draco.pc
+  configure_file("${draco_root}/cmake/draco.pc.template"
+                 "${draco_build}/draco.pc" @ONLY NEWLINE_STYLE UNIX)
+  install(FILES "${draco_build}/draco.pc" DESTINATION "${libs_path}/pkgconfig")
+
+  # CMake config: draco-config.cmake
+  configure_package_config_file(
+    "${draco_root}/cmake/draco-config.cmake.template"
+    "${draco_build}/draco-config.cmake"
+    INSTALL_DESTINATION "${data_path}/cmake/draco")
+
+  write_basic_package_version_file(
+    "${draco_build}/draco-config-version.cmake"
+    VERSION ${DRACO_VERSION}
+    COMPATIBILITY AnyNewerVersion)
+
+  export(
+    EXPORT dracoExport
+    NAMESPACE draco::
+    FILE "${draco_build}/draco-targets.cmake")
+
+  install(
+    EXPORT dracoExport
+    NAMESPACE draco::
+    FILE draco-targets.cmake
+    DESTINATION "${data_path}/cmake/draco")
+
+  install(FILES "${draco_build}/draco-config.cmake"
+                "${draco_build}/draco-config-version.cmake"
+          DESTINATION "${data_path}/cmake/draco")
 endmacro()

contrib/draco/cmake/draco_intrinsics.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_INTRINSICS_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_INTRINSICS_CMAKE_
@@ -61,14 +75,12 @@ macro(draco_process_intrinsics_sources)
     unset(sse4_sources)
     list(APPEND sse4_sources ${arg_SOURCES})
 
-    list(FILTER sse4_sources INCLUDE REGEX
+    list(FILTER sse4_sources INCLUDE REGEX "${draco_sse4_source_file_suffix}$")
-         "${draco_sse4_source_file_suffix}$")
 
     if(sse4_sources)
       unset(sse4_flags)
-      draco_get_intrinsics_flag_for_suffix(SUFFIX
+      draco_get_intrinsics_flag_for_suffix(
-                                             ${draco_sse4_source_file_suffix}
+        SUFFIX ${draco_sse4_source_file_suffix} VARIABLE sse4_flags)
-                                             VARIABLE sse4_flags)
       if(sse4_flags)
         draco_set_compiler_flags_for_sources(SOURCES ${sse4_sources} FLAGS
                                              ${sse4_flags})
@@ -79,14 +91,12 @@ macro(draco_process_intrinsics_sources)
   if(DRACO_ENABLE_NEON AND draco_have_neon)
     unset(neon_sources)
     list(APPEND neon_sources ${arg_SOURCES})
-    list(FILTER neon_sources INCLUDE REGEX
+    list(FILTER neon_sources INCLUDE REGEX "${draco_neon_source_file_suffix}$")
-         "${draco_neon_source_file_suffix}$")
 
     if(neon_sources AND DRACO_NEON_INTRINSICS_FLAG)
       unset(neon_flags)
-      draco_get_intrinsics_flag_for_suffix(SUFFIX
+      draco_get_intrinsics_flag_for_suffix(
-                                             ${draco_neon_source_file_suffix}
+        SUFFIX ${draco_neon_source_file_suffix} VARIABLE neon_flags)
-                                             VARIABLE neon_flags)
       if(neon_flags)
         draco_set_compiler_flags_for_sources(SOURCES ${neon_sources} FLAGS
                                              ${neon_flags})

contrib/draco/cmake/draco_options.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_OPTIONS_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_OPTIONS_CMAKE_
@@ -18,14 +32,19 @@ macro(draco_option)
   cmake_parse_arguments(option "${optional_args}" "${single_value_args}"
                         "${multi_value_args}" ${ARGN})
 
-  if(NOT (option_NAME AND option_HELPSTRING AND DEFINED option_VALUE))
+  if(NOT
+     (option_NAME
+      AND option_HELPSTRING
+      AND DEFINED option_VALUE))
     message(FATAL_ERROR "draco_option: NAME HELPSTRING and VALUE required.")
   endif()
 
   option(${option_NAME} ${option_HELPSTRING} ${option_VALUE})
 
   if(DRACO_VERBOSE GREATER 2)
-    message("--------- draco_option ---------\n" "option_NAME=${option_NAME}\n"
+    message(
+      "--------- draco_option ---------\n"
+      "option_NAME=${option_NAME}\n"
       "option_HELPSTRING=${option_HELPSTRING}\n"
       "option_VALUE=${option_VALUE}\n"
       "------------------------------------------\n")
@@ -44,33 +63,74 @@ endmacro()
 
 # Set default options.
 macro(draco_set_default_options)
-  draco_option(NAME DRACO_FAST HELPSTRING "Try to build faster libs." VALUE OFF)
+  draco_option(
-  draco_option(NAME DRACO_JS_GLUE HELPSTRING
+    NAME DRACO_FAST
-               "Enable JS Glue and JS targets when using Emscripten." VALUE ON)
+    HELPSTRING "Try to build faster libs."
-  draco_option(NAME DRACO_IE_COMPATIBLE HELPSTRING
+    VALUE OFF)
-               "Enable support for older IE builds when using Emscripten." VALUE
+  draco_option(
-               OFF)
+    NAME DRACO_JS_GLUE
-  draco_option(NAME DRACO_MESH_COMPRESSION HELPSTRING "Enable mesh compression."
+    HELPSTRING "Enable JS Glue and JS targets when using Emscripten."
-               VALUE ON)
+    VALUE ON)
-  draco_option(NAME DRACO_POINT_CLOUD_COMPRESSION HELPSTRING
+  draco_option(
-               "Enable point cloud compression." VALUE ON)
+    NAME DRACO_IE_COMPATIBLE
-  draco_option(NAME DRACO_PREDICTIVE_EDGEBREAKER HELPSTRING
+    HELPSTRING "Enable support for older IE builds when using Emscripten."
-               "Enable predictive edgebreaker." VALUE ON)
+    VALUE OFF)
-  draco_option(NAME DRACO_STANDARD_EDGEBREAKER HELPSTRING
+  draco_option(
-               "Enable stand edgebreaker." VALUE ON)
+    NAME DRACO_MESH_COMPRESSION
-  draco_option(NAME DRACO_BACKWARDS_COMPATIBILITY HELPSTRING
+    HELPSTRING "Enable mesh compression."
-               "Enable backwards compatibility." VALUE ON)
+    VALUE ON)
-  draco_option(NAME DRACO_DECODER_ATTRIBUTE_DEDUPLICATION HELPSTRING
+  draco_option(
-               "Enable attribute deduping." VALUE OFF)
+    NAME DRACO_POINT_CLOUD_COMPRESSION
-  draco_option(NAME DRACO_TESTS HELPSTRING "Enables tests." VALUE OFF)
+    HELPSTRING "Enable point cloud compression."
-  draco_option(NAME DRACO_WASM HELPSTRING "Enables WASM support." VALUE OFF)
+    VALUE ON)
-  draco_option(NAME DRACO_UNITY_PLUGIN HELPSTRING
+  draco_option(
-               "Build plugin library for Unity." VALUE OFF)
+    NAME DRACO_PREDICTIVE_EDGEBREAKER
-  draco_option(NAME DRACO_ANIMATION_ENCODING HELPSTRING "Enable animation."
+    HELPSTRING "Enable predictive edgebreaker."
+    VALUE ON)
+  draco_option(
+    NAME DRACO_STANDARD_EDGEBREAKER
+    HELPSTRING "Enable stand edgebreaker."
+    VALUE ON)
+  draco_option(
+    NAME DRACO_BACKWARDS_COMPATIBILITY
+    HELPSTRING "Enable backwards compatibility."
+    VALUE ON)
+  draco_option(
+    NAME DRACO_DECODER_ATTRIBUTE_DEDUPLICATION
+    HELPSTRING "Enable attribute deduping."
+    VALUE OFF)
+  draco_option(
+    NAME DRACO_TESTS
+    HELPSTRING "Enables tests."
+    VALUE OFF)
+  draco_option(
+    NAME DRACO_WASM
+    HELPSTRING "Enables WASM support."
+    VALUE OFF)
+  draco_option(
+    NAME DRACO_UNITY_PLUGIN
+    HELPSTRING "Build plugin library for Unity."
+    VALUE OFF)
+  draco_option(
+    NAME DRACO_ANIMATION_ENCODING
+    HELPSTRING "Enable animation."
+    VALUE OFF)
+  draco_option(
+    NAME DRACO_GLTF_BITSTREAM
+    HELPSTRING "Draco GLTF extension bitstream specified features only."
+    VALUE OFF)
+  draco_option(
+    NAME DRACO_MAYA_PLUGIN
+    HELPSTRING "Build plugin library for Maya."
+    VALUE OFF)
+  draco_option(
+    NAME DRACO_TRANSCODER_SUPPORTED
+    HELPSTRING "Enable the Draco transcoder."
+    VALUE OFF)
+  draco_option(
+    NAME DRACO_DEBUG_COMPILER_WARNINGS
+    HELPSTRING "Turn on more warnings."
     VALUE OFF)
-  draco_option(NAME DRACO_GLTF HELPSTRING "Support GLTF." VALUE OFF)
-  draco_option(NAME DRACO_MAYA_PLUGIN HELPSTRING
-               "Build plugin library for Maya." VALUE OFF)
   draco_check_deprecated_options()
 endmacro()
 
@@ -117,14 +177,16 @@ macro(draco_check_deprecated_options)
                                  DRACO_MAYA_PLUGIN)
   draco_handle_deprecated_option(OLDNAME BUILD_USD_PLUGIN NEWNAME
                                  BUILD_SHARED_LIBS)
+  draco_handle_deprecated_option(OLDNAME DRACO_GLTF NEWNAME
+                                 DRACO_GLTF_BITSTREAM)
 
 endmacro()
 
 # Macro for setting Draco features based on user configuration. Features enabled
 # by this macro are Draco global.
 macro(draco_set_optional_features)
-  if(DRACO_GLTF)
+  if(DRACO_GLTF_BITSTREAM)
-    # Override settings when building for GLTF.
+    # Enable only the features included in the Draco GLTF bitstream spec.
     draco_enable_feature(FEATURE "DRACO_MESH_COMPRESSION_SUPPORTED")
     draco_enable_feature(FEATURE "DRACO_NORMAL_ENCODING_SUPPORTED")
     draco_enable_feature(FEATURE "DRACO_STANDARD_EDGEBREAKER_SUPPORTED")
@@ -170,6 +232,11 @@ macro(draco_set_optional_features)
     set(CMAKE_POSITION_INDEPENDENT_CODE ON)
   endif()
 
+  if(DRACO_TRANSCODER_SUPPORTED)
+    draco_enable_feature(FEATURE "DRACO_TRANSCODER_SUPPORTED")
+  endif()
+
+
 endmacro()
 
 # Macro that handles tracking of Draco preprocessor symbols for the purpose of
@@ -221,8 +288,56 @@ function(draco_generate_features_h)
     file(APPEND "${draco_features_file_name}.new" "#define ${feature}\n")
   endforeach()
 
+  if(MSVC)
+    if(NOT DRACO_DEBUG_COMPILER_WARNINGS)
       file(APPEND "${draco_features_file_name}.new"
-       "\n#endif  // DRACO_FEATURES_H_")
+           "// Enable DRACO_DEBUG_COMPILER_WARNINGS at CMake generation \n"
+           "// time to remove these pragmas.\n")
+
+      # warning C4018: '<operator>': signed/unsigned mismatch.
+      file(APPEND "${draco_features_file_name}.new"
+           "#pragma warning(disable:4018)\n")
+
+      # warning C4146: unary minus operator applied to unsigned type, result
+      # still unsigned
+      file(APPEND "${draco_features_file_name}.new"
+           "#pragma warning(disable:4146)\n")
+
+      # warning C4244: 'return': conversion from '<type>' to '<type>', possible
+      # loss of data.
+      file(APPEND "${draco_features_file_name}.new"
+           "#pragma warning(disable:4244)\n")
+
+      # warning C4267: 'initializing' conversion from '<type>' to '<type>',
+      # possible loss of data.
+      file(APPEND "${draco_features_file_name}.new"
+           "#pragma warning(disable:4267)\n")
+
+      # warning C4305: 'context' : truncation from 'type1' to 'type2'.
+      file(APPEND "${draco_features_file_name}.new"
+           "#pragma warning(disable:4305)\n")
+
+      # warning C4661: 'identifier' : no suitable definition provided for
+      # explicit template instantiation request.
+      file(APPEND "${draco_features_file_name}.new"
+           "#pragma warning(disable:4661)\n")
+
+      # warning C4800: Implicit conversion from 'type' to bool. Possible
+      # information loss.
+      # Also, in older MSVC releases:
+      # warning C4800: 'type' : forcing value to bool 'true' or 'false'
+      # (performance warning).
+      file(APPEND "${draco_features_file_name}.new"
+           "#pragma warning(disable:4800)\n")
+
+      # warning C4804: '<operator>': unsafe use of type '<type>' in operation.
+      file(APPEND "${draco_features_file_name}.new"
+           "#pragma warning(disable:4804)\n")
+    endif()
+  endif()
+
+  file(APPEND "${draco_features_file_name}.new"
+       "\n#endif  // DRACO_FEATURES_H_\n")
 
   # Will replace ${draco_features_file_name} only if the file content has
   # changed. This prevents forced Draco rebuilds after CMake runs.

contrib/draco/cmake/draco_sanitizer.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_SANITIZER_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_SANITIZER_CMAKE_
@@ -5,7 +19,9 @@ set(DRACO_CMAKE_DRACO_SANITIZER_CMAKE_ 1)
 
 # Handles the details of enabling sanitizers.
 macro(draco_configure_sanitizer)
-  if(DRACO_SANITIZE AND NOT EMSCRIPTEN AND NOT MSVC)
+  if(DRACO_SANITIZE
+     AND NOT EMSCRIPTEN
+     AND NOT MSVC)
     if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
       if(DRACO_SANITIZE MATCHES "cfi")
         list(APPEND SAN_CXX_FLAGS "-flto" "-fno-sanitize-trap=cfi")
@@ -13,8 +29,8 @@ macro(draco_configure_sanitizer)
                     "-fuse-ld=gold")
       endif()
 
-      if(${CMAKE_SIZEOF_VOID_P} EQUAL 4
+      if(${CMAKE_SIZEOF_VOID_P} EQUAL 4 AND DRACO_SANITIZE MATCHES
-         AND DRACO_SANITIZE MATCHES "integer|undefined")
+                                            "integer|undefined")
         list(APPEND SAN_LINKER_FLAGS "--rtlib=compiler-rt" "-lgcc_s")
       endif()
     endif()

contrib/draco/cmake/draco_targets.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_TARGETS_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_TARGETS_CMAKE_
@@ -51,14 +65,21 @@ macro(draco_add_executable)
   unset(exe_LIB_DEPS)
   set(optional_args TEST)
   set(single_value_args NAME OUTPUT_NAME)
-  set(multi_value_args SOURCES DEFINES INCLUDES COMPILE_FLAGS LINK_FLAGS
+  set(multi_value_args
-                       OBJLIB_DEPS LIB_DEPS)
+      SOURCES
+      DEFINES
+      INCLUDES
+      COMPILE_FLAGS
+      LINK_FLAGS
+      OBJLIB_DEPS
+      LIB_DEPS)
 
   cmake_parse_arguments(exe "${optional_args}" "${single_value_args}"
                         "${multi_value_args}" ${ARGN})
 
   if(DRACO_VERBOSE GREATER 1)
-    message("--------- draco_add_executable ---------\n"
+    message(
+      "--------- draco_add_executable ---------\n"
       "exe_TEST=${exe_TEST}\n"
       "exe_TEST_DEFINES_MAIN=${exe_TEST_DEFINES_MAIN}\n"
       "exe_NAME=${exe_NAME}\n"
@@ -87,7 +108,12 @@ macro(draco_add_executable)
   endif()
 
   add_executable(${exe_NAME} ${exe_SOURCES})
+
+    target_compile_features(${exe_NAME} PUBLIC cxx_std_11)
+
+  if(NOT EMSCRIPTEN)
     set_target_properties(${exe_NAME} PROPERTIES VERSION ${DRACO_VERSION})
+  endif()
 
   if(exe_OUTPUT_NAME)
     set_target_properties(${exe_NAME} PROPERTIES OUTPUT_NAME ${exe_OUTPUT_NAME})
@@ -104,8 +130,8 @@ macro(draco_add_executable)
   endif()
 
   if(exe_COMPILE_FLAGS OR DRACO_CXX_FLAGS)
-    target_compile_options(${exe_NAME}
+    target_compile_options(${exe_NAME} PRIVATE ${exe_COMPILE_FLAGS}
-                           PRIVATE ${exe_COMPILE_FLAGS} ${DRACO_CXX_FLAGS})
+                                               ${DRACO_CXX_FLAGS})
   endif()
 
   if(exe_LINK_FLAGS OR DRACO_EXE_LINKER_FLAGS)
@@ -113,8 +139,8 @@ macro(draco_add_executable)
       list(APPEND exe_LINK_FLAGS "${DRACO_EXE_LINKER_FLAGS}")
       # LINK_FLAGS is managed as a string.
       draco_set_and_stringify(SOURCE "${exe_LINK_FLAGS}" DEST exe_LINK_FLAGS)
-      set_target_properties(${exe_NAME}
+      set_target_properties(${exe_NAME} PROPERTIES LINK_FLAGS
-                            PROPERTIES LINK_FLAGS "${exe_LINK_FLAGS}")
+                                                   "${exe_LINK_FLAGS}")
     else()
       target_link_options(${exe_NAME} PRIVATE ${exe_LINK_FLAGS}
                           ${DRACO_EXE_LINKER_FLAGS})
@@ -136,12 +162,7 @@ macro(draco_add_executable)
   endif()
 
   if(exe_LIB_DEPS)
-    unset(exe_static)
+    if(CMAKE_CXX_COMPILER_ID MATCHES "^Clang|^GNU")
-    if("${CMAKE_EXE_LINKER_FLAGS} ${DRACO_EXE_LINKER_FLAGS}" MATCHES "static")
-      set(exe_static ON)
-    endif()
-
-    if(exe_static AND CMAKE_CXX_COMPILER_ID MATCHES "Clang|GNU")
       # Third party dependencies can introduce dependencies on system and test
       # libraries. Since the target created here is an executable, and CMake
       # does not provide a method of controlling order of link dependencies,
@@ -149,6 +170,10 @@ macro(draco_add_executable)
       # ensure that dependencies of third party targets can be resolved when
       # those dependencies happen to be resolved by dependencies of the current
       # target.
+      # TODO(tomfinegan): For portability use LINK_GROUP with RESCAN instead of
+      # directly (ab)using compiler/linker specific flags once CMake v3.24 is in
+      # wider use. See:
+      # https://cmake.org/cmake/help/latest/manual/cmake-generator-expressions.7.html#genex:LINK_GROUP
       list(INSERT exe_LIB_DEPS 0 -Wl,--start-group)
       list(APPEND exe_LIB_DEPS -Wl,--end-group)
     endif()
@@ -209,14 +234,23 @@ macro(draco_add_library)
   unset(lib_TARGET_PROPERTIES)
   set(optional_args TEST)
   set(single_value_args NAME OUTPUT_NAME TYPE)
-  set(multi_value_args SOURCES DEFINES INCLUDES COMPILE_FLAGS LINK_FLAGS
+  set(multi_value_args
-                       OBJLIB_DEPS LIB_DEPS PUBLIC_INCLUDES TARGET_PROPERTIES)
+      SOURCES
+      DEFINES
+      INCLUDES
+      COMPILE_FLAGS
+      LINK_FLAGS
+      OBJLIB_DEPS
+      LIB_DEPS
+      PUBLIC_INCLUDES
+      TARGET_PROPERTIES)
 
   cmake_parse_arguments(lib "${optional_args}" "${single_value_args}"
                         "${multi_value_args}" ${ARGN})
 
   if(DRACO_VERBOSE GREATER 1)
-    message("--------- draco_add_library ---------\n"
+    message(
+      "--------- draco_add_library ---------\n"
       "lib_TEST=${lib_TEST}\n"
       "lib_NAME=${lib_NAME}\n"
       "lib_OUTPUT_NAME=${lib_OUTPUT_NAME}\n"
@@ -256,14 +290,24 @@ macro(draco_add_library)
   endif()
 
   add_library(${lib_NAME} ${lib_TYPE} ${lib_SOURCES})
+
+    target_compile_features(${lib_NAME} PUBLIC cxx_std_11)
+
+  target_include_directories(${lib_NAME} PUBLIC $<INSTALL_INTERFACE:include>)
+
+  if(BUILD_SHARED_LIBS)
+    # Enable PIC for all targets in shared configurations.
+    set_target_properties(${lib_NAME} PROPERTIES POSITION_INDEPENDENT_CODE ON)
+  endif()
+
   if(lib_SOURCES)
     draco_process_intrinsics_sources(TARGET ${lib_NAME} SOURCES ${lib_SOURCES})
   endif()
 
   if(lib_OUTPUT_NAME)
     if(NOT (BUILD_SHARED_LIBS AND MSVC))
-      set_target_properties(${lib_NAME}
+      set_target_properties(${lib_NAME} PROPERTIES OUTPUT_NAME
-                            PROPERTIES OUTPUT_NAME ${lib_OUTPUT_NAME})
+                                                   ${lib_OUTPUT_NAME})
     endif()
   endif()
 
@@ -280,8 +324,8 @@ macro(draco_add_library)
   endif()
 
   if(lib_COMPILE_FLAGS OR DRACO_CXX_FLAGS)
-    target_compile_options(${lib_NAME}
+    target_compile_options(${lib_NAME} PRIVATE ${lib_COMPILE_FLAGS}
-                           PRIVATE ${lib_COMPILE_FLAGS} ${DRACO_CXX_FLAGS})
+                                               ${DRACO_CXX_FLAGS})
   endif()
 
   if(lib_LINK_FLAGS)
@@ -320,11 +364,12 @@ macro(draco_add_library)
     set_target_properties(${lib_NAME} PROPERTIES PREFIX "")
   endif()
 
+  if(NOT EMSCRIPTEN)
     # VERSION and SOVERSION as necessary
-  if(NOT lib_TYPE STREQUAL STATIC AND NOT lib_TYPE STREQUAL MODULE)
+    if((lib_TYPE STREQUAL BUNDLE OR lib_TYPE STREQUAL SHARED) AND NOT MSVC)
-    set_target_properties(${lib_NAME} PROPERTIES VERSION ${DRACO_VERSION})
+      set_target_properties(
-    if(NOT MSVC)
+        ${lib_NAME} PROPERTIES VERSION ${DRACO_SOVERSION}
-      set_target_properties(${lib_NAME} PROPERTIES SOVERSION ${DRACO_SOVERSION})
+                               SOVERSION ${DRACO_SOVERSION_MAJOR})
     endif()
   endif()
 

contrib/draco/cmake/draco_test_config.h.cmake

@@ -1,3 +1,17 @@
+// Copyright 2021 The Draco Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #ifndef DRACO_TESTING_DRACO_TEST_CONFIG_H_
 #define DRACO_TESTING_DRACO_TEST_CONFIG_H_
 
@@ -9,5 +23,6 @@
 
 #define DRACO_TEST_DATA_DIR "${DRACO_TEST_DATA_DIR}"
 #define DRACO_TEST_TEMP_DIR "${DRACO_TEST_TEMP_DIR}"
+#define DRACO_TEST_ROOT_DIR "${DRACO_TEST_ROOT_DIR}"
 
 #endif  // DRACO_TESTING_DRACO_TEST_CONFIG_H_

contrib/draco/cmake/draco_tests.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_TESTS_CMAKE)
   return()
 endif()
@@ -10,6 +24,13 @@ set(draco_factory_test_sources
     "${draco_src_root}/io/file_reader_factory_test.cc"
     "${draco_src_root}/io/file_writer_factory_test.cc")
 
+list(
+  APPEND draco_test_common_sources
+         "${draco_src_root}/core/draco_test_base.h"
+         "${draco_src_root}/core/draco_test_utils.cc"
+         "${draco_src_root}/core/draco_test_utils.h"
+         "${draco_src_root}/core/status.cc")
+
 list(
   APPEND
     draco_test_sources
@@ -30,22 +51,23 @@ list(
     "${draco_src_root}/compression/point_cloud/point_cloud_kd_tree_encoding_test.cc"
     "${draco_src_root}/compression/point_cloud/point_cloud_sequential_encoding_test.cc"
     "${draco_src_root}/core/buffer_bit_coding_test.cc"
-    "${draco_src_root}/core/draco_test_base.h"
-    "${draco_src_root}/core/draco_test_utils.cc"
-    "${draco_src_root}/core/draco_test_utils.h"
     "${draco_src_root}/core/math_utils_test.cc"
     "${draco_src_root}/core/quantization_utils_test.cc"
     "${draco_src_root}/core/status_test.cc"
     "${draco_src_root}/core/vector_d_test.cc"
     "${draco_src_root}/io/file_reader_test_common.h"
     "${draco_src_root}/io/file_utils_test.cc"
+    "${draco_src_root}/io/file_writer_utils_test.cc"
     "${draco_src_root}/io/stdio_file_reader_test.cc"
     "${draco_src_root}/io/stdio_file_writer_test.cc"
     "${draco_src_root}/io/obj_decoder_test.cc"
     "${draco_src_root}/io/obj_encoder_test.cc"
     "${draco_src_root}/io/ply_decoder_test.cc"
     "${draco_src_root}/io/ply_reader_test.cc"
+    "${draco_src_root}/io/stl_decoder_test.cc"
+    "${draco_src_root}/io/stl_encoder_test.cc"
     "${draco_src_root}/io/point_cloud_io_test.cc"
+    "${draco_src_root}/mesh/corner_table_test.cc"
     "${draco_src_root}/mesh/mesh_are_equivalent_test.cc"
     "${draco_src_root}/mesh/mesh_cleanup_test.cc"
     "${draco_src_root}/mesh/triangle_soup_mesh_builder_test.cc"
@@ -54,47 +76,71 @@ list(
     "${draco_src_root}/point_cloud/point_cloud_builder_test.cc"
     "${draco_src_root}/point_cloud/point_cloud_test.cc")
 
-list(APPEND draco_gtest_all
+if(DRACO_TRANSCODER_SUPPORTED)
-            "${draco_root}/../googletest/googletest/src/gtest-all.cc")
+  list(
-list(APPEND draco_gtest_main
+    APPEND draco_test_sources
-            "${draco_root}/../googletest/googletest/src/gtest_main.cc")
+           "${draco_src_root}/animation/animation_test.cc"
+           "${draco_src_root}/io/gltf_decoder_test.cc"
+           "${draco_src_root}/io/gltf_encoder_test.cc"
+           "${draco_src_root}/io/gltf_utils_test.cc"
+           "${draco_src_root}/io/gltf_test_helper.cc"
+           "${draco_src_root}/io/gltf_test_helper.h"
+           "${draco_src_root}/io/scene_io_test.cc"
+           "${draco_src_root}/io/texture_io_test.cc"
+           "${draco_src_root}/material/material_library_test.cc"
+           "${draco_src_root}/material/material_test.cc"
+           "${draco_src_root}/metadata/property_table_test.cc"
+           "${draco_src_root}/metadata/structural_metadata_test.cc"
+           "${draco_src_root}/scene/instance_array_test.cc"
+           "${draco_src_root}/scene/light_test.cc"
+           "${draco_src_root}/scene/mesh_group_test.cc"
+           "${draco_src_root}/scene/scene_test.cc"
+           "${draco_src_root}/scene/scene_are_equivalent_test.cc"
+           "${draco_src_root}/scene/scene_utils_test.cc"
+           "${draco_src_root}/scene/trs_matrix_test.cc"
+           "${draco_src_root}/texture/texture_library_test.cc"
+           "${draco_src_root}/texture/texture_map_test.cc"
+           "${draco_src_root}/texture/texture_transform_test.cc")
+
+endif()
 
 macro(draco_setup_test_targets)
   if(DRACO_TESTS)
+    draco_setup_googletest()
+
     if(NOT (EXISTS ${draco_gtest_all} AND EXISTS ${draco_gtest_main}))
-      message(FATAL "googletest must be a sibling directory of ${draco_root}.")
+      message(FATAL_ERROR "googletest missing, run git submodule update --init")
     endif()
 
     list(APPEND draco_test_defines GTEST_HAS_PTHREAD=0)
 
-    draco_add_library(TEST
+    draco_add_library(
-                      NAME
+      TEST
-                      draco_gtest
+      NAME draco_test_common
-                      TYPE
+      TYPE STATIC
-                      STATIC
+      SOURCES ${draco_test_common_sources}
-                      SOURCES
+      DEFINES ${draco_defines} ${draco_test_defines}
-                      ${draco_gtest_all}
+      INCLUDES ${draco_test_include_paths})
-                      DEFINES
-                      ${draco_defines}
-                      ${draco_test_defines}
-                      INCLUDES
-                      ${draco_test_include_paths})
 
-    draco_add_library(TEST
+    draco_add_library(
-                      NAME
+      TEST
-                      draco_gtest_main
+      NAME draco_gtest
-                      TYPE
+      TYPE STATIC
-                      STATIC
+      SOURCES ${draco_gtest_all}
-                      SOURCES
+      DEFINES ${draco_defines} ${draco_test_defines}
-                      ${draco_gtest_main}
+      INCLUDES ${draco_test_include_paths})
-                      DEFINES
+
-                      ${draco_defines}
+    draco_add_library(
-                      ${draco_test_defines}
+      TEST
-                      INCLUDES
+      NAME draco_gtest_main
-                      ${draco_test_include_paths})
+      TYPE STATIC
+      SOURCES ${draco_gtest_main}
+      DEFINES ${draco_defines} ${draco_test_defines}
+      INCLUDES ${draco_test_include_paths})
 
     set(DRACO_TEST_DATA_DIR "${draco_root}/testdata")
     set(DRACO_TEST_TEMP_DIR "${draco_build}/draco_test_temp")
+    set(DRACO_TEST_ROOT_DIR "${draco_root}")
     file(MAKE_DIRECTORY "${DRACO_TEST_TEMP_DIR}")
 
     # Sets DRACO_TEST_DATA_DIR and DRACO_TEST_TEMP_DIR.
@@ -102,32 +148,24 @@ macro(draco_setup_test_targets)
                    "${draco_build}/testing/draco_test_config.h")
 
     # Create the test targets.
-    draco_add_executable(NAME
+    draco_add_executable(
-                         draco_tests
+      TEST
-                         SOURCES
+      NAME draco_tests
-                         ${draco_test_sources}
+      SOURCES ${draco_test_sources}
-                         DEFINES
+      DEFINES ${draco_defines} ${draco_test_defines}
-                         ${draco_defines}
+      INCLUDES ${draco_test_include_paths}
-                         ${draco_test_defines}
+      LIB_DEPS ${draco_dependency} draco_gtest draco_gtest_main
-                         INCLUDES
+               draco_test_common)
-                         ${draco_test_include_paths}
+
-                         LIB_DEPS
+    draco_add_executable(
-                         draco_static
+      TEST
-                         draco_gtest
+      NAME draco_factory_tests
-                         draco_gtest_main)
+      SOURCES ${draco_factory_test_sources}
+      DEFINES ${draco_defines} ${draco_test_defines}
+      INCLUDES ${draco_test_include_paths}
+      LIB_DEPS ${draco_dependency} draco_gtest draco_gtest_main
+               draco_test_common)
+
 
-    draco_add_executable(NAME
-                         draco_factory_tests
-                         SOURCES
-                         ${draco_factory_test_sources}
-                         DEFINES
-                         ${draco_defines}
-                         ${draco_test_defines}
-                         INCLUDES
-                         ${draco_test_include_paths}
-                         LIB_DEPS
-                         draco_static
-                         draco_gtest
-                         draco_gtest_main)
   endif()
 endmacro()

contrib/draco/cmake/draco_variables.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_DRACO_VARIABLES_CMAKE_)
   return()
 endif() # DRACO_CMAKE_DRACO_VARIABLES_CMAKE_
@@ -14,8 +28,7 @@ macro(draco_variable_must_be_directory variable_name)
 
   if("${${variable_name}}" STREQUAL "")
     message(
-      FATAL_ERROR
+      FATAL_ERROR "Empty variable ${variable_name} is required to build draco.")
-        "Empty variable ${variable_name} is required to build draco.")
   endif()
 
   if(NOT IS_DIRECTORY "${${variable_name}}")
@@ -44,7 +57,9 @@ macro(draco_dump_cmake_flag_variables)
   list(APPEND flag_variables "CMAKE_CXX_FLAGS_INIT" "CMAKE_CXX_FLAGS"
               "CMAKE_EXE_LINKER_FLAGS_INIT" "CMAKE_EXE_LINKER_FLAGS")
   if(CMAKE_BUILD_TYPE)
-    list(APPEND flag_variables "CMAKE_BUILD_TYPE"
+    list(
+      APPEND flag_variables
+             "CMAKE_BUILD_TYPE"
              "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}_INIT"
              "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}"
              "CMAKE_EXE_LINKER_FLAGS_${CMAKE_BUILD_TYPE}_INIT"

contrib/draco/cmake/sanitizers.cmake

@@ -1,19 +0,0 @@
-if(DRACO_CMAKE_SANITIZERS_CMAKE_)
-  return()
-endif()
-set(DRACO_CMAKE_SANITIZERS_CMAKE_ 1)
-
-if(MSVC OR NOT SANITIZE)
-  return()
-endif()
-
-include("${draco_root}/cmake/compiler_flags.cmake")
-
-string(TOLOWER ${SANITIZE} SANITIZE)
-
-# Require the sanitizer requested.
-require_linker_flag("-fsanitize=${SANITIZE}")
-require_compiler_flag("-fsanitize=${SANITIZE}" YES)
-
-# Make callstacks accurate.
-require_compiler_flag("-fno-omit-frame-pointer -fno-optimize-sibling-calls" YES)

contrib/draco/cmake/toolchains/aarch64-linux-gnu.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_AARCH64_LINUX_GNU_CMAKE_)
   return()
 endif() # DRACO_CMAKE_TOOLCHAINS_AARCH64_LINUX_GNU_CMAKE_

contrib/draco/cmake/toolchains/android-ndk-common.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ANDROID_NDK_COMMON_CMAKE_)
   return()
 endif()

contrib/draco/cmake/toolchains/android.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ANDROID_CMAKE_)
   return()
 endif() # DRACO_CMAKE_TOOLCHAINS_ANDROID_CMAKE_
@@ -16,9 +30,9 @@ if(NOT ANDROID_ABI)
   set(ANDROID_ABI arm64-v8a)
 endif()
 
-# Force arm mode for 32-bit targets (instead of the default thumb) to improve
+# Force arm mode for 32-bit arm targets (instead of the default thumb) to
-# performance.
+# improve performance.
-if(NOT ANDROID_ARM_MODE)
+if(ANDROID_ABI MATCHES "^armeabi" AND NOT ANDROID_ARM_MODE)
   set(ANDROID_ARM_MODE arm)
 endif()
 

contrib/draco/cmake/toolchains/arm-ios-common.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ARM_IOS_COMMON_CMAKE_)
   return()
 endif()
@@ -13,5 +27,3 @@ set(CMAKE_C_COMPILER clang)
 set(CMAKE_C_COMPILER_ARG1 "-arch ${CMAKE_SYSTEM_PROCESSOR}")
 set(CMAKE_CXX_COMPILER clang++)
 set(CMAKE_CXX_COMPILER_ARG1 "-arch ${CMAKE_SYSTEM_PROCESSOR}")
-
-# TODO(tomfinegan): Handle bit code embedding.

contrib/draco/cmake/toolchains/arm-linux-gnueabihf.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ARM_LINUX_GNUEABIHF_CMAKE_)
   return()
 endif() # DRACO_CMAKE_TOOLCHAINS_ARM_LINUX_GNUEABIHF_CMAKE_

contrib/draco/cmake/toolchains/arm64-android-ndk-libcpp.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ARM64_ANDROID_NDK_LIBCPP_CMAKE_)
   return()
 endif()

contrib/draco/cmake/toolchains/arm64-ios.cmake

@@ -1,10 +1,23 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ARM64_IOS_CMAKE_)
   return()
 endif()
 set(DRACO_CMAKE_TOOLCHAINS_ARM64_IOS_CMAKE_ 1)
 
 if(XCODE)
-  # TODO(tomfinegan): Handle arm builds in Xcode.
   message(FATAL_ERROR "This toolchain does not support Xcode.")
 endif()
 

contrib/draco/cmake/toolchains/arm64-linux-gcc.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ARM64_LINUX_GCC_CMAKE_)
   return()
 endif()

contrib/draco/cmake/toolchains/armv7-android-ndk-libcpp.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ARMV7_ANDROID_NDK_LIBCPP_CMAKE_)
   return()
 endif()

contrib/draco/cmake/toolchains/armv7-ios.cmake

@@ -1,10 +1,23 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ARMV7_IOS_CMAKE_)
   return()
 endif()
 set(DRACO_CMAKE_TOOLCHAINS_ARMV7_IOS_CMAKE_ 1)
 
 if(XCODE)
-  # TODO(tomfinegan): Handle arm builds in Xcode.
   message(FATAL_ERROR "This toolchain does not support Xcode.")
 endif()
 

contrib/draco/cmake/toolchains/armv7-linux-gcc.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ARMV7_LINUX_GCC_CMAKE_)
   return()
 endif()

contrib/draco/cmake/toolchains/armv7s-ios.cmake

@@ -1,10 +1,23 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_ARMV7S_IOS_CMAKE_)
   return()
 endif()
 set(DRACO_CMAKE_TOOLCHAINS_ARMV7S_IOS_CMAKE_ 1)
 
 if(XCODE)
-  # TODO(tomfinegan): Handle arm builds in Xcode.
   message(FATAL_ERROR "This toolchain does not support Xcode.")
 endif()
 

contrib/draco/cmake/toolchains/i386-ios.cmake

@@ -1,10 +1,23 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_i386_IOS_CMAKE_)
   return()
 endif()
 set(DRACO_CMAKE_TOOLCHAINS_i386_IOS_CMAKE_ 1)
 
 if(XCODE)
-  # TODO(tomfinegan): Handle arm builds in Xcode.
   message(FATAL_ERROR "This toolchain does not support Xcode.")
 endif()
 

contrib/draco/cmake/toolchains/x86-android-ndk-libcpp.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_X86_ANDROID_NDK_LIBCPP_CMAKE_)
   return()
 endif()

contrib/draco/cmake/toolchains/x86_64-android-ndk-libcpp.cmake

@@ -1,3 +1,17 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_X86_64_ANDROID_NDK_LIBCPP_CMAKE_)
   return()
 endif()

contrib/draco/cmake/toolchains/x86_64-ios.cmake

@@ -1,10 +1,23 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
 if(DRACO_CMAKE_TOOLCHAINS_X86_64_IOS_CMAKE_)
   return()
 endif()
 set(DRACO_CMAKE_TOOLCHAINS_X86_64_IOS_CMAKE_ 1)
 
 if(XCODE)
-  # TODO(tomfinegan): Handle arm builds in Xcode.
   message(FATAL_ERROR "This toolchain does not support Xcode.")
 endif()
 

contrib/draco/cmake/util.cmake

@@ -1,79 +0,0 @@
-if(DRACO_CMAKE_UTIL_CMAKE_)
-  return()
-endif()
-set(DRACO_CMAKE_UTIL_CMAKE_ 1)
-
-# Creates dummy source file in $draco_build_dir named $basename.$extension and
-# returns the full path to the dummy source file via the $out_file_path
-# parameter.
-function(create_dummy_source_file basename extension out_file_path)
-  set(dummy_source_file "${draco_build_dir}/${basename}.${extension}")
-  file(WRITE "${dummy_source_file}.new"
-       "// Generated file. DO NOT EDIT!\n"
-       "// ${target_name} needs a ${extension} file to force link language, \n"
-       "// or to silence a harmless CMake warning: Ignore me.\n"
-       "void ${target_name}_dummy_function(void) {}\n")
-
-  # Will replace ${dummy_source_file} only if the file content has changed.
-  # This prevents forced Draco rebuilds after CMake runs.
-  configure_file("${dummy_source_file}.new" "${dummy_source_file}")
-  file(REMOVE "${dummy_source_file}.new")
-
-  set(${out_file_path} ${dummy_source_file} PARENT_SCOPE)
-endfunction()
-
-# Convenience function for adding a dummy source file to $target_name using
-# $extension as the file extension. Wraps create_dummy_source_file().
-function(add_dummy_source_file_to_target target_name extension)
-  create_dummy_source_file("${target_name}" "${extension}" "dummy_source_file")
-  target_sources(${target_name} PRIVATE ${dummy_source_file})
-endfunction()
-
-# Extracts the version number from $version_file and returns it to the user via
-# $version_string_out_var. This is achieved by finding the first instance of the
-# kDracoVersion variable and then removing everything but the string literal
-# assigned to the variable. Quotes and semicolon are stripped from the returned
-# string.
-function(extract_version_string version_file version_string_out_var)
-  file(STRINGS "${version_file}" draco_version REGEX "kDracoVersion")
-  list(GET draco_version 0 draco_version)
-  string(REPLACE "static const char kDracoVersion[] = " "" draco_version
-                 "${draco_version}")
-  string(REPLACE ";" "" draco_version "${draco_version}")
-  string(REPLACE "\"" "" draco_version "${draco_version}")
-  set("${version_string_out_var}" "${draco_version}" PARENT_SCOPE)
-endfunction()
-
-# Sets CMake compiler launcher to $launcher_name when $launcher_name is found in
-# $PATH. Warns user about ignoring build flag $launcher_flag when $launcher_name
-# is not found in $PATH.
-function(set_compiler_launcher launcher_flag launcher_name)
-  find_program(launcher_path "${launcher_name}")
-  if(launcher_path)
-    set(CMAKE_C_COMPILER_LAUNCHER "${launcher_path}" PARENT_SCOPE)
-    set(CMAKE_CXX_COMPILER_LAUNCHER "${launcher_path}" PARENT_SCOPE)
-    message("--- Using ${launcher_name} as compiler launcher.")
-  else()
-    message(
-      WARNING "--- Cannot find ${launcher_name}, ${launcher_flag} ignored.")
-  endif()
-endfunction()
-
-# Terminates CMake execution when $var_name is unset in the environment. Sets
-# CMake variable to the value of the environment variable when the variable is
-# present in the environment.
-macro(require_variable var_name)
-  if("$ENV{${var_name}}" STREQUAL "")
-    message(FATAL_ERROR "${var_name} must be set in environment.")
-  endif()
-  set_variable_if_unset(${var_name} "")
-endmacro()
-
-# Sets $var_name to $default_value if not already set.
-macro(set_variable_if_unset var_name default_value)
-  if(NOT "$ENV{${var_name}}" STREQUAL "")
-    set(${var_name} $ENV{${var_name}})
-  elseif(NOT ${var_name})
-    set(${var_name} ${default_value})
-  endif()
-endmacro()

contrib/draco/src/draco/animation/animation.cc

@@ -0,0 +1,47 @@
+// Copyright 2019 The Draco Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#include "draco/animation/animation.h"
+
+#ifdef DRACO_TRANSCODER_SUPPORTED
+
+namespace draco {
+
+void Animation::Copy(const Animation &src) {
+  name_ = src.name_;
+  channels_.clear();
+  for (int i = 0; i < src.NumChannels(); ++i) {
+    std::unique_ptr<AnimationChannel> new_channel(new AnimationChannel());
+    new_channel->Copy(*src.GetChannel(i));
+    channels_.push_back(std::move(new_channel));
+  }
+
+  samplers_.clear();
+  for (int i = 0; i < src.NumSamplers(); ++i) {
+    std::unique_ptr<AnimationSampler> new_sampler(new AnimationSampler());
+    new_sampler->Copy(*src.GetSampler(i));
+    samplers_.push_back(std::move(new_sampler));
+  }
+
+  node_animation_data_.clear();
+  for (int i = 0; i < src.NumNodeAnimationData(); ++i) {
+    std::unique_ptr<NodeAnimationData> new_data(new NodeAnimationData());
+    new_data->Copy(*src.GetNodeAnimationData(i));
+    node_animation_data_.push_back(std::move(new_data));
+  }
+}
+
+}  // namespace draco
+
+#endif  // DRACO_TRANSCODER_SUPPORTED

contrib/draco/src/draco/animation/animation.h

@@ -0,0 +1,149 @@
+// Copyright 2019 The Draco Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#ifndef DRACO_ANIMATION_ANIMATION_H_
+#define DRACO_ANIMATION_ANIMATION_H_
+
+#include "draco/draco_features.h"
+
+#ifdef DRACO_TRANSCODER_SUPPORTED
+#include <memory>
+#include <vector>
+
+#include "draco/animation/node_animation_data.h"
+#include "draco/core/status.h"
+
+namespace draco {
+
+// Struct to hold information about an animation's sampler.
+struct AnimationSampler {
+  enum class SamplerInterpolation { LINEAR, STEP, CUBICSPLINE };
+
+  static std::string InterpolationToString(SamplerInterpolation value) {
+    switch (value) {
+      case SamplerInterpolation::STEP:
+        return "STEP";
+      case SamplerInterpolation::CUBICSPLINE:
+        return "CUBICSPLINE";
+      default:
+        return "LINEAR";
+    }
+  }
+
+  AnimationSampler()
+      : input_index(-1),
+        interpolation_type(SamplerInterpolation::LINEAR),
+        output_index(-1) {}
+
+  void Copy(const AnimationSampler &src) {
+    input_index = src.input_index;
+    interpolation_type = src.interpolation_type;
+    output_index = src.output_index;
+  }
+
+  int input_index;
+  SamplerInterpolation interpolation_type;
+  int output_index;
+};
+
+// Struct to hold information about an animation's channel.
+struct AnimationChannel {
+  enum class ChannelTransformation { TRANSLATION, ROTATION, SCALE, WEIGHTS };
+
+  static std::string TransformationToString(ChannelTransformation value) {
+    switch (value) {
+      case ChannelTransformation::ROTATION:
+        return "rotation";
+      case ChannelTransformation::SCALE:
+        return "scale";
+      case ChannelTransformation::WEIGHTS:
+        return "weights";
+      default:
+        return "translation";
+    }
+  }
+
+  AnimationChannel()
+      : target_index(-1),
+        transformation_type(ChannelTransformation::TRANSLATION),
+        sampler_index(-1) {}
+
+  void Copy(const AnimationChannel &src) {
+    target_index = src.target_index;
+    transformation_type = src.transformation_type;
+    sampler_index = src.sampler_index;
+  }
+
+  int target_index;
+  ChannelTransformation transformation_type;
+  int sampler_index;
+};
+
+// This class is used to hold data and information of glTF animations.
+class Animation {
+ public:
+  Animation() {}
+
+  void Copy(const Animation &src);
+
+  const std::string &GetName() const { return name_; }
+  void SetName(const std::string &name) { name_ = name; }
+
+  // Returns the number of channels in an animation.
+  int NumChannels() const { return channels_.size(); }
+  // Returns the number of samplers in an animation.
+  int NumSamplers() const { return samplers_.size(); }
+  // Returns the number of accessors in an animation.
+  int NumNodeAnimationData() const { return node_animation_data_.size(); }
+
+  // Returns a channel in the animation.
+  AnimationChannel *GetChannel(int index) { return channels_[index].get(); }
+  const AnimationChannel *GetChannel(int index) const {
+    return channels_[index].get();
+  }
+  // Returns a sampler in the animation.
+  AnimationSampler *GetSampler(int index) { return samplers_[index].get(); }
+  const AnimationSampler *GetSampler(int index) const {
+    return samplers_[index].get();
+  }
+  // Returns an accessor in the animation.
+  NodeAnimationData *GetNodeAnimationData(int index) {
+    return node_animation_data_[index].get();
+  }
+  const NodeAnimationData *GetNodeAnimationData(int index) const {
+    return node_animation_data_[index].get();
+  }
+
+  void AddNodeAnimationData(
+      std::unique_ptr<NodeAnimationData> node_animation_data) {
+    node_animation_data_.push_back(std::move(node_animation_data));
+  }
+  void AddSampler(std::unique_ptr<AnimationSampler> sampler) {
+    samplers_.push_back(std::move(sampler));
+  }
+  void AddChannel(std::unique_ptr<AnimationChannel> channel) {
+    channels_.push_back(std::move(channel));
+  }
+
+ private:
+  std::string name_;
+  std::vector<std::unique_ptr<AnimationSampler>> samplers_;
+  std::vector<std::unique_ptr<AnimationChannel>> channels_;
+  std::vector<std::unique_ptr<NodeAnimationData>> node_animation_data_;
+};
+
+}  // namespace draco
+
+#endif  // DRACO_TRANSCODER_SUPPORTED
+#endif  // DRACO_ANIMATION_ANIMATION_H_

contrib/draco/src/draco/animation/animation_test.cc

@@ -0,0 +1,71 @@
+// Copyright 2021 The Draco Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#include "draco/animation/animation.h"
+
+#include "draco/core/draco_test_base.h"
+#include "draco/draco_features.h"
+
+namespace {
+
+#ifdef DRACO_TRANSCODER_SUPPORTED
+TEST(AnimationTest, TestCopy) {
+  // Test copying of animation data.
+  draco::Animation src_anim;
+  ASSERT_TRUE(src_anim.GetName().empty());
+  src_anim.SetName("Walking");
+  ASSERT_EQ(src_anim.GetName(), "Walking");
+
+  std::unique_ptr<draco::AnimationSampler> src_sampler_0(
+      new draco::AnimationSampler());
+  src_sampler_0->interpolation_type =
+      draco::AnimationSampler::SamplerInterpolation::CUBICSPLINE;
+  std::unique_ptr<draco::AnimationSampler> src_sampler_1(
+      new draco::AnimationSampler());
+  src_sampler_1->Copy(*src_sampler_0);
+
+  ASSERT_EQ(src_sampler_0->interpolation_type,
+            src_sampler_1->interpolation_type);
+
+  src_sampler_1->interpolation_type =
+      draco::AnimationSampler::SamplerInterpolation::STEP;
+
+  src_anim.AddSampler(std::move(src_sampler_0));
+  src_anim.AddSampler(std::move(src_sampler_1));
+  ASSERT_EQ(src_anim.NumSamplers(), 2);
+
+  std::unique_ptr<draco::AnimationChannel> src_channel(
+      new draco::AnimationChannel());
+  src_channel->transformation_type =
+      draco::AnimationChannel::ChannelTransformation::WEIGHTS;
+  src_anim.AddChannel(std::move(src_channel));
+  ASSERT_EQ(src_anim.NumChannels(), 1);
+
+  draco::Animation dst_anim;
+  dst_anim.Copy(src_anim);
+
+  ASSERT_EQ(dst_anim.GetName(), src_anim.GetName());
+  ASSERT_EQ(dst_anim.NumSamplers(), 2);
+  ASSERT_EQ(dst_anim.NumChannels(), 1);
+
+  ASSERT_EQ(dst_anim.GetSampler(0)->interpolation_type,
+            src_anim.GetSampler(0)->interpolation_type);
+  ASSERT_EQ(dst_anim.GetSampler(1)->interpolation_type,
+            src_anim.GetSampler(1)->interpolation_type);
+  ASSERT_EQ(dst_anim.GetChannel(0)->transformation_type,
+            src_anim.GetChannel(0)->transformation_type);
+}
+#endif  // DRACO_TRANSCODER_SUPPORTED
+
+}  // namespace

contrib/draco/src/draco/animation/keyframe_animation_encoding_test.cc

@@ -26,8 +26,9 @@ class KeyframeAnimationEncodingTest : public ::testing::Test {
 
   bool CreateAndAddTimestamps(int32_t num_frames) {
     timestamps_.resize(num_frames);
-    for (int i = 0; i < timestamps_.size(); ++i)
+    for (int i = 0; i < timestamps_.size(); ++i) {
       timestamps_[i] = static_cast<draco::KeyframeAnimation::TimestampType>(i);
+    }
     return keyframe_animation_.SetTimestamps(timestamps_);
   }
 
@@ -35,8 +36,9 @@ class KeyframeAnimationEncodingTest : public ::testing::Test {
                                     uint32_t num_components) {
     // Create and add animation data with.
     animation_data_.resize(num_frames * num_components);
-    for (int i = 0; i < animation_data_.size(); ++i)
+    for (int i = 0; i < animation_data_.size(); ++i) {
       animation_data_[i] = static_cast<float>(i);
+    }
     return keyframe_animation_.AddKeyframes(draco::DT_FLOAT32, num_components,
                                             animation_data_);
   }
@@ -49,7 +51,7 @@ class KeyframeAnimationEncodingTest : public ::testing::Test {
     ASSERT_EQ(animation0.num_animations(), animation1.num_animations());
 
     if (quantized) {
-      // TODO(hemmer) : Add test for stable quantization.
+      // TODO(b/199760123) : Add test for stable quantization.
       // Quantization will result in slightly different values.
       // Skip comparing values.
       return;
@@ -109,9 +111,8 @@ class KeyframeAnimationEncodingTest : public ::testing::Test {
       }
     }
 
-    ASSERT_TRUE(
+    DRACO_ASSERT_OK(
-        encoder.EncodeKeyframeAnimation(keyframe_animation_, options, &buffer)
+        encoder.EncodeKeyframeAnimation(keyframe_animation_, options, &buffer));
-            .ok());
 
     draco::DecoderBuffer dec_decoder;
     draco::KeyframeAnimationDecoder decoder;
@@ -122,8 +123,8 @@ class KeyframeAnimationEncodingTest : public ::testing::Test {
     std::unique_ptr<KeyframeAnimation> decoded_animation(
         new KeyframeAnimation());
     DecoderOptions dec_options;
-    ASSERT_TRUE(
+    DRACO_ASSERT_OK(
-        decoder.Decode(dec_options, &dec_buffer, decoded_animation.get()).ok());
+        decoder.Decode(dec_options, &dec_buffer, decoded_animation.get()));
 
     // Verify if animation before and after compression is identical.
     CompareAnimationData<num_components_t>(keyframe_animation_,

contrib/draco/src/draco/animation/keyframe_animation_test.cc

@@ -24,8 +24,9 @@ class KeyframeAnimationTest : public ::testing::Test {
 
   bool CreateAndAddTimestamps(int32_t num_frames) {
     timestamps_.resize(num_frames);
-    for (int i = 0; i < timestamps_.size(); ++i)
+    for (int i = 0; i < timestamps_.size(); ++i) {
       timestamps_[i] = static_cast<draco::KeyframeAnimation::TimestampType>(i);
+    }
     return keyframe_animation_.SetTimestamps(timestamps_);
   }
 
@@ -33,8 +34,9 @@ class KeyframeAnimationTest : public ::testing::Test {
                                     uint32_t num_components) {
     // Create and add animation data with.
     animation_data_.resize(num_frames * num_components);
-    for (int i = 0; i < animation_data_.size(); ++i)
+    for (int i = 0; i < animation_data_.size(); ++i) {
       animation_data_[i] = static_cast<float>(i);
+    }
     return keyframe_animation_.AddKeyframes(draco::DT_FLOAT32, num_components,
                                             animation_data_);
   }

contrib/draco/src/draco/animation/node_animation_data.h

@@ -0,0 +1,150 @@
+// Copyright 2019 The Draco Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#ifndef DRACO_ANIMATION_NODE_ANIMATION_DATA_H_
+#define DRACO_ANIMATION_NODE_ANIMATION_DATA_H_
+
+#include "draco/draco_features.h"
+
+#ifdef DRACO_TRANSCODER_SUPPORTED
+
+#include "draco/core/hash_utils.h"
+#include "draco/core/status.h"
+#include "draco/core/status_or.h"
+
+namespace draco {
+
+// This class is used to store information and data for animations that only
+// affect the nodes.
+// TODO(fgalligan): Think about changing the name of this class now that Skin
+// is using it.
+class NodeAnimationData {
+ public:
+  enum class Type { SCALAR, VEC3, VEC4, MAT4 };
+
+  NodeAnimationData() : type_(Type::SCALAR), count_(0), normalized_(false) {}
+
+  void Copy(const NodeAnimationData &src) {
+    type_ = src.type_;
+    count_ = src.count_;
+    normalized_ = src.normalized_;
+    data_ = src.data_;
+  }
+
+  Type type() const { return type_; }
+  int count() const { return count_; }
+  bool normalized() const { return normalized_; }
+
+  std::vector<float> *GetMutableData() { return &data_; }
+  const std::vector<float> *GetData() const { return &data_; }
+
+  void SetType(Type type) { type_ = type; }
+  void SetCount(int count) { count_ = count; }
+  void SetNormalized(bool normalized) { normalized_ = normalized; }
+
+  int ComponentSize() const { return sizeof(float); }
+  int NumComponents() const {
+    switch (type_) {
+      case Type::SCALAR:
+        return 1;
+      case Type::VEC3:
+        return 3;
+      case Type::MAT4:
+        return 16;
+      default:
+        return 4;
+    }
+  }
+
+  std::string TypeAsString() const {
+    switch (type_) {
+      case Type::SCALAR:
+        return "SCALAR";
+      case Type::VEC3:
+        return "VEC3";
+      case Type::MAT4:
+        return "MAT4";
+      default:
+        return "VEC4";
+    }
+  }
+
+  bool operator==(const NodeAnimationData &nad) const {
+    return type_ == nad.type_ && count_ == nad.count_ &&
+           normalized_ == nad.normalized_ && data_ == nad.data_;
+  }
+
+ private:
+  Type type_;
+  int count_;
+  bool normalized_;
+  std::vector<float> data_;
+};
+
+// Wrapper class for hashing NodeAnimationData. When using different containers,
+// this class is preferable instead of copying the data in NodeAnimationData
+// every time.
+class NodeAnimationDataHash {
+ public:
+  NodeAnimationDataHash() = delete;
+  NodeAnimationDataHash &operator=(const NodeAnimationDataHash &) = delete;
+  NodeAnimationDataHash(NodeAnimationDataHash &&) = delete;
+  NodeAnimationDataHash &operator=(NodeAnimationDataHash &&) = delete;
+
+  explicit NodeAnimationDataHash(const NodeAnimationData *nad)
+      : node_animation_data_(nad) {
+    hash_ = NodeAnimationDataHash::HashNodeAnimationData(*node_animation_data_);
+  }
+
+  NodeAnimationDataHash(const NodeAnimationDataHash &nadh) {
+    node_animation_data_ = nadh.node_animation_data_;
+    hash_ = nadh.hash_;
+  }
+
+  bool operator==(const NodeAnimationDataHash &nadh) const {
+    return *node_animation_data_ == *nadh.node_animation_data_;
+  }
+
+  struct Hash {
+    size_t operator()(const NodeAnimationDataHash &nadh) const {
+      return nadh.hash_;
+    }
+  };
+
+  const NodeAnimationData *GetNodeAnimationData() {
+    return node_animation_data_;
+  }
+
+ private:
+  // Returns a hash of |nad|.
+  static size_t HashNodeAnimationData(const NodeAnimationData &nad) {
+    size_t hash = 79;  // Magic number.
+    hash = HashCombine(static_cast<int>(nad.type()), hash);
+    hash = HashCombine(nad.count(), hash);
+    hash = HashCombine(nad.normalized(), hash);
+    const uint64_t data_hash =
+        FingerprintString(reinterpret_cast<const char *>(nad.GetData()->data()),
+                          nad.GetData()->size() * sizeof(float));
+    hash = HashCombine(data_hash, hash);
+    return hash;
+  }
+
+  const NodeAnimationData *node_animation_data_;
+  size_t hash_;
+};
+
+}  // namespace draco
+
+#endif  // DRACO_TRANSCODER_SUPPORTED
+#endif  // DRACO_ANIMATION_NODE_ANIMATION_DATA_H_

contrib/draco/src/draco/animation/skin.cc

@@ -0,0 +1,29 @@
+// Copyright 2019 The Draco Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#include "draco/animation/skin.h"
+
+#ifdef DRACO_TRANSCODER_SUPPORTED
+
+namespace draco {
+
+void Skin::Copy(const Skin &s) {
+  inverse_bind_matrices_.Copy(s.GetInverseBindMatrices());
+  joints_ = s.GetJoints();
+  joint_root_index_ = s.GetJointRoot();
+}
+
+}  // namespace draco
+
+#endif  // DRACO_TRANSCODER_SUPPORTED

contrib/draco/src/draco/animation/skin.h

@@ -0,0 +1,64 @@
+// Copyright 2019 The Draco Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#ifndef DRACO_ANIMATION_SKIN_H_
+#define DRACO_ANIMATION_SKIN_H_
+
+#include "draco/draco_features.h"
+
+#ifdef DRACO_TRANSCODER_SUPPORTED
+
+#include <vector>
+
+#include "draco/animation/node_animation_data.h"
+#include "draco/scene/scene_indices.h"
+
+namespace draco {
+
+// This class is used to store information on animation skins.
+class Skin {
+ public:
+  Skin() : joint_root_index_(-1) {}
+
+  void Copy(const Skin &s);
+
+  NodeAnimationData &GetInverseBindMatrices() { return inverse_bind_matrices_; }
+  const NodeAnimationData &GetInverseBindMatrices() const {
+    return inverse_bind_matrices_;
+  }
+
+  int AddJoint(SceneNodeIndex index) {
+    joints_.push_back(index);
+    return joints_.size() - 1;
+  }
+  int NumJoints() const { return joints_.size(); }
+  SceneNodeIndex GetJoint(int index) const { return joints_[index]; }
+  SceneNodeIndex &GetJoint(int index) { return joints_[index]; }
+  const std::vector<SceneNodeIndex> &GetJoints() const { return joints_; }
+
+  void SetJointRoot(SceneNodeIndex index) { joint_root_index_ = index; }
+  SceneNodeIndex GetJointRoot() const { return joint_root_index_; }
+
+ private:
+  NodeAnimationData inverse_bind_matrices_;
+
+  // List of node indices that make up the joint hierarchy.
+  std::vector<SceneNodeIndex> joints_;
+  SceneNodeIndex joint_root_index_;
+};
+
+}  // namespace draco
+
+#endif  // DRACO_TRANSCODER_SUPPORTED
+#endif  // DRACO_ANIMATION_SKIN_H_

contrib/draco/src/draco/attributes/attribute_transform.cc

@@ -28,12 +28,13 @@ std::unique_ptr<PointAttribute> AttributeTransform::InitTransformedAttribute(
     const PointAttribute &src_attribute, int num_entries) {
   const int num_components = GetTransformedNumComponents(src_attribute);
   const DataType dt = GetTransformedDataType(src_attribute);
-  GeometryAttribute va;
+  GeometryAttribute ga;
-  va.Init(src_attribute.attribute_type(), nullptr, num_components, dt, false,
+  ga.Init(src_attribute.attribute_type(), nullptr, num_components, dt, false,
           num_components * DataTypeLength(dt), 0);
-  std::unique_ptr<PointAttribute> transformed_attribute(new PointAttribute(va));
+  std::unique_ptr<PointAttribute> transformed_attribute(new PointAttribute(ga));
   transformed_attribute->Reset(num_entries);
   transformed_attribute->SetIdentityMapping();
+  transformed_attribute->set_unique_id(src_attribute.unique_id());
   return transformed_attribute;
 }
 

contrib/draco/src/draco/attributes/geometry_attribute.cc

@@ -26,7 +26,7 @@ GeometryAttribute::GeometryAttribute()
       unique_id_(0) {}
 
 void GeometryAttribute::Init(GeometryAttribute::Type attribute_type,
-                             DataBuffer *buffer, int8_t num_components,
+                             DataBuffer *buffer, uint8_t num_components,
                              DataType data_type, bool normalized,
                              int64_t byte_stride, int64_t byte_offset) {
   buffer_ = buffer;

contrib/draco/src/draco/attributes/geometry_attribute.h

@@ -15,12 +15,18 @@
 #ifndef DRACO_ATTRIBUTES_GEOMETRY_ATTRIBUTE_H_
 #define DRACO_ATTRIBUTES_GEOMETRY_ATTRIBUTE_H_
 
+#include <algorithm>
 #include <array>
+#include <cmath>
 #include <limits>
 
 #include "draco/attributes/geometry_indices.h"
 #include "draco/core/data_buffer.h"
 #include "draco/core/hash_utils.h"
+#include "draco/draco_features.h"
+#ifdef DRACO_TRANSCODER_SUPPORTED
+#include "draco/core/status.h"
+#endif
 
 namespace draco {
 
@@ -51,6 +57,16 @@ class GeometryAttribute {
     // predefined use case. Such attributes are often used for a shader specific
     // data.
     GENERIC,
+#ifdef DRACO_TRANSCODER_SUPPORTED
+    // TODO(ostava): Adding a new attribute would be bit-stream change for GLTF.
+    // Older decoders wouldn't know what to do with this attribute type. This
+    // should be open-sourced only when we are ready to increase our bit-stream
+    // version.
+    TANGENT,
+    MATERIAL,
+    JOINTS,
+    WEIGHTS,
+#endif
     // Total number of different attribute types.
     // Always keep behind all named attributes.
     NAMED_ATTRIBUTES_COUNT,
@@ -58,7 +74,7 @@ class GeometryAttribute {
 
   GeometryAttribute();
   // Initializes and enables the attribute.
-  void Init(Type attribute_type, DataBuffer *buffer, int8_t num_components,
+  void Init(Type attribute_type, DataBuffer *buffer, uint8_t num_components,
             DataType data_type, bool normalized, int64_t byte_stride,
             int64_t byte_offset);
   bool IsValid() const { return buffer_ != nullptr; }
@@ -129,6 +145,17 @@ class GeometryAttribute {
     buffer_->Write(byte_pos, value, byte_stride());
   }
 
+#ifdef DRACO_TRANSCODER_SUPPORTED
+  // Sets a value of an attribute entry. The input |value| must have
+  // |input_num_components| entries and it will be automatically converted to
+  // the internal format used by the geometry attribute. If the conversion is
+  // not possible, an error status will be returned.
+  template <typename InputT>
+  Status ConvertAndSetAttributeValue(AttributeValueIndex avi,
+                                     int input_num_components,
+                                     const InputT *value);
+#endif
+
   // DEPRECATED: Use
   //   ConvertValue(AttributeValueIndex att_id,
   //               int out_num_components,
@@ -233,10 +260,11 @@ class GeometryAttribute {
   // Returns the number of components that are stored for each entry.
   // For position attribute this is usually three (x,y,z),
   // while texture coordinates have two components (u,v).
-  int8_t num_components() const { return num_components_; }
+  uint8_t num_components() const { return num_components_; }
   // Indicates whether the data type should be normalized before interpretation,
   // that is, it should be divided by the max value of the data type.
   bool normalized() const { return normalized_; }
+  void set_normalized(bool normalized) { normalized_ = normalized; }
   // The buffer storing the entire data of the attribute.
   const DataBuffer *buffer() const { return buffer_; }
   // Returns the number of bytes between two attribute entries, this is, at
@@ -260,7 +288,7 @@ class GeometryAttribute {
   // T is the stored attribute data type.
   // OutT is the desired data type of the attribute.
   template <typename T, typename OutT>
-  bool ConvertTypedValue(AttributeValueIndex att_id, int8_t out_num_components,
+  bool ConvertTypedValue(AttributeValueIndex att_id, uint8_t out_num_components,
                          OutT *out_value) const {
     const uint8_t *src_address = GetAddress(att_id);
 
@@ -270,29 +298,10 @@ class GeometryAttribute {
         return false;
       }
       const T in_value = *reinterpret_cast<const T *>(src_address);
-
+      if (!ConvertComponentValue<T, OutT>(in_value, normalized_,
-      // Make sure the in_value fits within the range of values that OutT
+                                          out_value + i)) {
-      // is able to represent. Perform the check only for integral types.
-      if (std::is_integral<T>::value && std::is_integral<OutT>::value) {
-        static constexpr OutT kOutMin =
-            std::is_signed<T>::value ? std::numeric_limits<OutT>::lowest() : 0;
-        if (in_value < kOutMin || in_value > std::numeric_limits<OutT>::max()) {
         return false;
       }
-      }
-
-      out_value[i] = static_cast<OutT>(in_value);
-      // When converting integer to floating point, normalize the value if
-      // necessary.
-      if (std::is_integral<T>::value && std::is_floating_point<OutT>::value &&
-          normalized_) {
-        out_value[i] /= static_cast<OutT>(std::numeric_limits<T>::max());
-      }
-      // TODO(ostava): Add handling of normalized attributes when converting
-      // between different integer representations. If the attribute is
-      // normalized, integer values should be converted as if they represent 0-1
-      // range. E.g. when we convert uint16 to uint8, the range <0, 2^16 - 1>
-      // should be converted to range <0, 2^8 - 1>.
       src_address += sizeof(T);
     }
     // Fill empty data for unused output components if needed.
@@ -302,12 +311,128 @@ class GeometryAttribute {
     return true;
   }
 
+#ifdef DRACO_TRANSCODER_SUPPORTED
+  // Function that converts input |value| from type T to the internal attribute
+  // representation defined by OutT and |num_components_|.
+  template <typename T, typename OutT>
+  Status ConvertAndSetAttributeTypedValue(AttributeValueIndex avi,
+                                          int8_t input_num_components,
+                                          const T *value) {
+    uint8_t *address = GetAddress(avi);
+
+    // Convert all components available in both the original and output formats.
+    for (int i = 0; i < num_components_; ++i) {
+      if (!IsAddressValid(address)) {
+        return ErrorStatus("GeometryAttribute: Invalid address.");
+      }
+      OutT *const out_value = reinterpret_cast<OutT *>(address);
+      if (i < input_num_components) {
+        if (!ConvertComponentValue<T, OutT>(*(value + i), normalized_,
+                                            out_value)) {
+          return ErrorStatus(
+              "GeometryAttribute: Failed to convert component value.");
+        }
+      } else {
+        *out_value = static_cast<OutT>(0);
+      }
+      address += sizeof(OutT);
+    }
+    return OkStatus();
+  }
+#endif  // DRACO_TRANSCODER_SUPPORTED
+
+  // Converts |in_value| of type T into |out_value| of type OutT. If
+  // |normalized| is true, any conversion between floating point and integer
+  // values will be treating integers as normalized types (the entire integer
+  // range will be used to represent 0-1 floating point range).
+  template <typename T, typename OutT>
+  static bool ConvertComponentValue(const T &in_value, bool normalized,
+                                    OutT *out_value) {
+    // Make sure the |in_value| can be represented as an integral type OutT.
+    if (std::is_integral<OutT>::value) {
+      // Make sure the |in_value| fits within the range of values that OutT
+      // is able to represent. Perform the check only for integral types.
+      if (!std::is_same<T, bool>::value && std::is_integral<T>::value) {
+        static constexpr OutT kOutMin =
+            std::is_signed<T>::value ? std::numeric_limits<OutT>::min() : 0;
+        if (in_value < kOutMin || in_value > std::numeric_limits<OutT>::max()) {
+          return false;
+        }
+      }
+
+      // Check conversion of floating point |in_value| to integral value OutT.
+      if (std::is_floating_point<T>::value) {
+        // Make sure the floating point |in_value| is not NaN and not Inf as
+        // integral type OutT is unable to represent these values.
+        if (sizeof(in_value) > sizeof(double)) {
+          if (std::isnan(static_cast<long double>(in_value)) ||
+              std::isinf(static_cast<long double>(in_value))) {
+            return false;
+          }
+        } else if (sizeof(in_value) > sizeof(float)) {
+          if (std::isnan(static_cast<double>(in_value)) ||
+              std::isinf(static_cast<double>(in_value))) {
+            return false;
+          }
+        } else {
+          if (std::isnan(static_cast<float>(in_value)) ||
+              std::isinf(static_cast<float>(in_value))) {
+            return false;
+          }
+        }
+
+        // Make sure the floating point |in_value| fits within the range of
+        // values that integral type OutT is able to represent.
+        if (in_value < std::numeric_limits<OutT>::min() ||
+            in_value >= std::numeric_limits<OutT>::max()) {
+          return false;
+        }
+      }
+    }
+
+    if (std::is_integral<T>::value && std::is_floating_point<OutT>::value &&
+        normalized) {
+      // When converting integer to floating point, normalize the value if
+      // necessary.
+      *out_value = static_cast<OutT>(in_value);
+      *out_value /= static_cast<OutT>(std::numeric_limits<T>::max());
+    } else if (std::is_floating_point<T>::value &&
+               std::is_integral<OutT>::value && normalized) {
+      // Converting from floating point to a normalized integer.
+      if (in_value > 1 || in_value < 0) {
+        // Normalized float values need to be between 0 and 1.
+        return false;
+      }
+      // TODO(ostava): Consider allowing float to normalized integer conversion
+      // for 64-bit integer types. Currently it doesn't work because we don't
+      // have a floating point type that could store all 64 bit integers.
+      if (sizeof(OutT) > 4) {
+        return false;
+      }
+      // Expand the float to the range of the output integer and round it to the
+      // nearest representable value. Use doubles for the math to ensure the
+      // integer values are represented properly during the conversion process.
+      *out_value = static_cast<OutT>(std::floor(
+          in_value * static_cast<double>(std::numeric_limits<OutT>::max()) +
+          0.5));
+    } else {
+      *out_value = static_cast<OutT>(in_value);
+    }
+
+    // TODO(ostava): Add handling of normalized attributes when converting
+    // between different integer representations. If the attribute is
+    // normalized, integer values should be converted as if they represent 0-1
+    // range. E.g. when we convert uint16 to uint8, the range <0, 2^16 - 1>
+    // should be converted to range <0, 2^8 - 1>.
+    return true;
+  }
+
   DataBuffer *buffer_;
   // The buffer descriptor is stored at the time the buffer is attached to this
   // attribute. The purpose is to detect if any changes happened to the buffer
   // since the time it was attached.
   DataBufferDescriptor buffer_descriptor_;
-  int8_t num_components_;
+  uint8_t num_components_;
   DataType data_type_;
   bool normalized_;
   int64_t byte_stride_;
@@ -323,6 +448,54 @@ class GeometryAttribute {
   friend struct GeometryAttributeHasher;
 };
 
+#ifdef DRACO_TRANSCODER_SUPPORTED
+template <typename InputT>
+Status GeometryAttribute::ConvertAndSetAttributeValue(AttributeValueIndex avi,
+                                                      int input_num_components,
+                                                      const InputT *value) {
+  switch (this->data_type()) {
+    case DT_INT8:
+      return ConvertAndSetAttributeTypedValue<InputT, int8_t>(
+          avi, input_num_components, value);
+    case DT_UINT8:
+      return ConvertAndSetAttributeTypedValue<InputT, uint8_t>(
+          avi, input_num_components, value);
+    case DT_INT16:
+      return ConvertAndSetAttributeTypedValue<InputT, int16_t>(
+          avi, input_num_components, value);
+    case DT_UINT16:
+      return ConvertAndSetAttributeTypedValue<InputT, uint16_t>(
+          avi, input_num_components, value);
+    case DT_INT32:
+      return ConvertAndSetAttributeTypedValue<InputT, int32_t>(
+          avi, input_num_components, value);
+    case DT_UINT32:
+      return ConvertAndSetAttributeTypedValue<InputT, uint32_t>(
+          avi, input_num_components, value);
+    case DT_INT64:
+      return ConvertAndSetAttributeTypedValue<InputT, int64_t>(
+          avi, input_num_components, value);
+    case DT_UINT64:
+      return ConvertAndSetAttributeTypedValue<InputT, uint64_t>(
+          avi, input_num_components, value);
+    case DT_FLOAT32:
+      return ConvertAndSetAttributeTypedValue<InputT, float>(
+          avi, input_num_components, value);
+    case DT_FLOAT64:
+      return ConvertAndSetAttributeTypedValue<InputT, double>(
+          avi, input_num_components, value);
+    case DT_BOOL:
+      return ConvertAndSetAttributeTypedValue<InputT, bool>(
+          avi, input_num_components, value);
+    default:
+      break;
+  }
+  return ErrorStatus(
+      "GeometryAttribute::SetAndConvertAttributeValue: Unsupported "
+      "attribute type.");
+}
+#endif
+
 // Hashing support
 
 // Function object for using Attribute as a hash key.

contrib/draco/src/draco/attributes/point_attribute.cc

@@ -222,4 +222,47 @@ AttributeValueIndex::ValueType PointAttribute::DeduplicateFormattedValues(
 }
 #endif
 
+#ifdef DRACO_TRANSCODER_SUPPORTED
+void PointAttribute::RemoveUnusedValues() {
+  if (is_mapping_identity()) {
+    return;  // For identity mapping, all values are always used.
+  }
+  // For explicit mapping we need to check if any point is mapped to a value.
+  // If not we can delete the value.
+  IndexTypeVector<AttributeValueIndex, bool> is_value_used(size(), false);
+  int num_used_values = 0;
+  for (PointIndex pi(0); pi < indices_map_.size(); ++pi) {
+    const AttributeValueIndex avi = indices_map_[pi];
+    if (!is_value_used[avi]) {
+      is_value_used[avi] = true;
+      num_used_values++;
+    }
+  }
+  if (num_used_values == size()) {
+    return;  // All values are used.
+  }
+
+  // Remap the values and update the point to value mapping.
+  IndexTypeVector<AttributeValueIndex, AttributeValueIndex>
+      old_to_new_value_map(size(), kInvalidAttributeValueIndex);
+  AttributeValueIndex new_avi(0);
+  for (AttributeValueIndex avi(0); avi < size(); ++avi) {
+    if (!is_value_used[avi]) {
+      continue;
+    }
+    if (avi != new_avi) {
+      SetAttributeValue(new_avi, GetAddress(avi));
+    }
+    old_to_new_value_map[avi] = new_avi++;
+  }
+
+  // Remap all points to the new attribute values.
+  for (PointIndex pi(0); pi < indices_map_.size(); ++pi) {
+    indices_map_[pi] = old_to_new_value_map[indices_map_[pi]];
+  }
+
+  num_unique_entries_ = num_used_values;
+}
+#endif
+
 }  // namespace draco

contrib/draco/src/draco/attributes/point_attribute.h

@@ -133,6 +133,12 @@ class PointAttribute : public GeometryAttribute {
     return attribute_transform_data_.get();
   }
 
+#ifdef DRACO_TRANSCODER_SUPPORTED
+  // Removes unused values from the attribute. Value is unused when no point
+  // is mapped to the value. Only applicable when the mapping is not identity.
+  void RemoveUnusedValues();
+#endif
+
  private:
 #ifdef DRACO_ATTRIBUTE_VALUES_DEDUPLICATION_SUPPORTED
   template <typename T>

contrib/draco/src/draco/compression/attributes/attributes_encoder.cc

@@ -15,14 +15,16 @@
 #include "draco/compression/attributes/attributes_encoder.h"
 
 #include "draco/core/varint_encoding.h"
+#include "draco/draco_features.h"
 
 namespace draco {
 
 AttributesEncoder::AttributesEncoder()
     : point_cloud_encoder_(nullptr), point_cloud_(nullptr) {}
 
-AttributesEncoder::AttributesEncoder(int att_id) : AttributesEncoder() {
+AttributesEncoder::AttributesEncoder(int point_attrib_id)
-  AddAttributeId(att_id);
+    : AttributesEncoder() {
+  AddAttributeId(point_attrib_id);
 }
 
 bool AttributesEncoder::Init(PointCloudEncoder *encoder, const PointCloud *pc) {
@@ -37,7 +39,15 @@ bool AttributesEncoder::EncodeAttributesEncoderData(EncoderBuffer *out_buffer) {
   for (uint32_t i = 0; i < num_attributes(); ++i) {
     const int32_t att_id = point_attribute_ids_[i];
     const PointAttribute *const pa = point_cloud_->attribute(att_id);
-    out_buffer->Encode(static_cast<uint8_t>(pa->attribute_type()));
+    GeometryAttribute::Type type = pa->attribute_type();
+#ifdef DRACO_TRANSCODER_SUPPORTED
+    // Attribute types TANGENT, MATERIAL, JOINTS, and WEIGHTS are not supported
+    // in the official bitstream. They will be encoded as GENERIC.
+    if (type > GeometryAttribute::GENERIC) {
+      type = GeometryAttribute::GENERIC;
+    }
+#endif
+    out_buffer->Encode(static_cast<uint8_t>(type));
     out_buffer->Encode(static_cast<uint8_t>(pa->data_type()));
     out_buffer->Encode(static_cast<uint8_t>(pa->num_components()));
     out_buffer->Encode(static_cast<uint8_t>(pa->normalized()));

contrib/draco/src/draco/compression/attributes/kd_tree_attributes_decoder.cc

@@ -72,16 +72,19 @@ class PointAttributeVectorOutputIterator {
 
   Self &operator*() { return *this; }
   // Still needed in some cases.
-  // TODO(hemmer): remove.
+  // TODO(b/199760123): Remove.
   // hardcoded to 3 based on legacy usage.
   const Self &operator=(const VectorD<CoeffT, 3> &val) {
     DRACO_DCHECK_EQ(attributes_.size(), 1);  // Expect only ONE attribute.
     AttributeTuple &att = attributes_[0];
     PointAttribute *attribute = std::get<0>(att);
+    const AttributeValueIndex avi = attribute->mapped_index(point_id_);
+    if (avi >= static_cast<uint32_t>(attribute->size())) {
+      return *this;
+    }
     const uint32_t &offset = std::get<1>(att);
     DRACO_DCHECK_EQ(offset, 0);  // expected to be zero
-    attribute->SetAttributeValue(attribute->mapped_index(point_id_),
+    attribute->SetAttributeValue(avi, &val[0] + offset);
-                                 &val[0] + offset);
     return *this;
   }
   // Additional operator taking std::vector as argument.
@@ -89,6 +92,10 @@ class PointAttributeVectorOutputIterator {
     for (auto index = 0; index < attributes_.size(); index++) {
       AttributeTuple &att = attributes_[index];
       PointAttribute *attribute = std::get<0>(att);
+      const AttributeValueIndex avi = attribute->mapped_index(point_id_);
+      if (avi >= static_cast<uint32_t>(attribute->size())) {
+        return *this;
+      }
       const uint32_t &offset = std::get<1>(att);
       const uint32_t &data_size = std::get<3>(att);
       const uint32_t &num_components = std::get<4>(att);
@@ -103,10 +110,6 @@ class PointAttributeVectorOutputIterator {
         // redirect to copied data
         data_source = reinterpret_cast<uint32_t *>(data_);
       }
-      const AttributeValueIndex avi = attribute->mapped_index(point_id_);
-      if (avi >= static_cast<uint32_t>(attribute->size())) {
-        return *this;
-      }
       attribute->SetAttributeValue(avi, data_source);
     }
     return *this;
@@ -195,54 +198,55 @@ bool KdTreeAttributesDecoder::DecodePortableAttributes(
                               data_size, num_components);
     total_dimensionality += num_components;
   }
-  PointAttributeVectorOutputIterator<uint32_t> out_it(atts);
+  typedef PointAttributeVectorOutputIterator<uint32_t> OutIt;
+  OutIt out_it(atts);
 
   switch (compression_level) {
     case 0: {
-      DynamicIntegerPointsKdTreeDecoder<0> decoder(total_dimensionality);
+      if (!DecodePoints<0, OutIt>(total_dimensionality, num_points, in_buffer,
-      if (!decoder.DecodePoints(in_buffer, out_it)) {
+                                  &out_it)) {
         return false;
       }
       break;
     }
     case 1: {
-      DynamicIntegerPointsKdTreeDecoder<1> decoder(total_dimensionality);
+      if (!DecodePoints<1, OutIt>(total_dimensionality, num_points, in_buffer,
-      if (!decoder.DecodePoints(in_buffer, out_it)) {
+                                  &out_it)) {
         return false;
       }
       break;
     }
     case 2: {
-      DynamicIntegerPointsKdTreeDecoder<2> decoder(total_dimensionality);
+      if (!DecodePoints<2, OutIt>(total_dimensionality, num_points, in_buffer,
-      if (!decoder.DecodePoints(in_buffer, out_it)) {
+                                  &out_it)) {
         return false;
       }
       break;
     }
     case 3: {
-      DynamicIntegerPointsKdTreeDecoder<3> decoder(total_dimensionality);
+      if (!DecodePoints<3, OutIt>(total_dimensionality, num_points, in_buffer,
-      if (!decoder.DecodePoints(in_buffer, out_it)) {
+                                  &out_it)) {
         return false;
       }
       break;
     }
     case 4: {
-      DynamicIntegerPointsKdTreeDecoder<4> decoder(total_dimensionality);
+      if (!DecodePoints<4, OutIt>(total_dimensionality, num_points, in_buffer,
-      if (!decoder.DecodePoints(in_buffer, out_it)) {
+                                  &out_it)) {
         return false;
       }
       break;
     }
     case 5: {
-      DynamicIntegerPointsKdTreeDecoder<5> decoder(total_dimensionality);
+      if (!DecodePoints<5, OutIt>(total_dimensionality, num_points, in_buffer,
-      if (!decoder.DecodePoints(in_buffer, out_it)) {
+                                  &out_it)) {
         return false;
       }
       break;
     }
     case 6: {
-      DynamicIntegerPointsKdTreeDecoder<6> decoder(total_dimensionality);
+      if (!DecodePoints<6, OutIt>(total_dimensionality, num_points, in_buffer,
-      if (!decoder.DecodePoints(in_buffer, out_it)) {
+                                  &out_it)) {
         return false;
       }
       break;
@@ -253,6 +257,19 @@ bool KdTreeAttributesDecoder::DecodePortableAttributes(
   return true;
 }
 
+template <int level_t, typename OutIteratorT>
+bool KdTreeAttributesDecoder::DecodePoints(int total_dimensionality,
+                                           int num_expected_points,
+                                           DecoderBuffer *in_buffer,
+                                           OutIteratorT *out_iterator) {
+  DynamicIntegerPointsKdTreeDecoder<level_t> decoder(total_dimensionality);
+  if (!decoder.DecodePoints(in_buffer, *out_iterator, num_expected_points) ||
+      decoder.num_decoded_points() != num_expected_points) {
+    return false;
+  }
+  return true;
+}
+
 bool KdTreeAttributesDecoder::DecodeDataNeededByPortableTransforms(
     DecoderBuffer *in_buffer) {
   if (in_buffer->bitstream_version() >= DRACO_BITSTREAM_VERSION(2, 3)) {
@@ -336,6 +353,10 @@ bool KdTreeAttributesDecoder::DecodeDataNeededByPortableTransforms(
     return false;
   }
   if (method == KdTreeAttributesEncodingMethod::kKdTreeQuantizationEncoding) {
+    // This method only supports one attribute with exactly three components.
+    if (atts.size() != 1 || std::get<4>(atts[0]) != 3) {
+      return false;
+    }
     uint8_t compression_level = 0;
     if (!in_buffer->Decode(&compression_level)) {
       return false;
@@ -376,7 +397,7 @@ bool KdTreeAttributesDecoder::DecodeDataNeededByPortableTransforms(
           GetDecoder()->point_cloud()->attribute(att_id);
       attr->Reset(num_points);
       attr->SetIdentityMapping();
-    };
+    }
 
     PointAttributeVectorOutputIterator<uint32_t> out_it(atts);
 
@@ -455,7 +476,11 @@ bool KdTreeAttributesDecoder::TransformAttributeBackToSignedType(
     att->GetValue(avi, &unsigned_val[0]);
     for (int c = 0; c < att->num_components(); ++c) {
       // Up-cast |unsigned_val| to int32_t to ensure we don't overflow it for
-      // smaller data types.
+      // smaller data types. But first check that the up-casting does not cause
+      // signed integer overflow.
+      if (unsigned_val[c] > std::numeric_limits<int32_t>::max()) {
+        return false;
+      }
       signed_val[c] = static_cast<SignedDataTypeT>(
           static_cast<int32_t>(unsigned_val[c]) +
           min_signed_values_[num_processed_signed_components + c]);

contrib/draco/src/draco/compression/attributes/kd_tree_attributes_decoder.h

@@ -31,6 +31,10 @@ class KdTreeAttributesDecoder : public AttributesDecoder {
   bool TransformAttributesToOriginalFormat() override;
 
  private:
+  template <int level_t, typename OutIteratorT>
+  bool DecodePoints(int total_dimensionality, int num_expected_points,
+                    DecoderBuffer *in_buffer, OutIteratorT *out_iterator);
+
   template <typename SignedDataTypeT>
   bool TransformAttributeBackToSignedType(PointAttribute *att,
                                           int num_processed_signed_components);

contrib/draco/src/draco/compression/attributes/normal_compression_utils.h

@@ -61,7 +61,7 @@ class OctahedronToolBox {
       return false;
     }
     quantization_bits_ = q;
-    max_quantized_value_ = (1 << quantization_bits_) - 1;
+    max_quantized_value_ = (1u << quantization_bits_) - 1;
     max_value_ = max_quantized_value_ - 1;
     dequantization_scale_ = 2.f / max_value_;
     center_value_ = max_value_ / 2;
@@ -208,7 +208,9 @@ class OctahedronToolBox {
     DRACO_DCHECK_LE(t, center_value_);
     DRACO_DCHECK_GE(s, -center_value_);
     DRACO_DCHECK_GE(t, -center_value_);
-    return std::abs(s) + std::abs(t) <= center_value_;
+    const uint32_t st =
+        static_cast<uint32_t>(std::abs(s)) + static_cast<uint32_t>(std::abs(t));
+    return st <= center_value_;
   }
 
   void InvertDiamond(int32_t *s, int32_t *t) const {
@@ -230,19 +232,29 @@ class OctahedronToolBox {
       sign_t = (*t > 0) ? 1 : -1;
     }
 
-    const int32_t corner_point_s = sign_s * center_value_;
+    // Perform the addition and subtraction using unsigned integers to avoid
-    const int32_t corner_point_t = sign_t * center_value_;
+    // signed integer overflows for bad data. Note that the result will be
-    *s = 2 * *s - corner_point_s;
+    // unchanged for non-overflowing cases.
-    *t = 2 * *t - corner_point_t;
+    const uint32_t corner_point_s = sign_s * center_value_;
+    const uint32_t corner_point_t = sign_t * center_value_;
+    uint32_t us = *s;
+    uint32_t ut = *t;
+    us = us + us - corner_point_s;
+    ut = ut + ut - corner_point_t;
     if (sign_s * sign_t >= 0) {
-      int32_t temp = *s;
+      uint32_t temp = us;
-      *s = -*t;
+      us = -ut;
-      *t = -temp;
+      ut = -temp;
     } else {
-      std::swap(*s, *t);
+      std::swap(us, ut);
     }
-    *s = (*s + corner_point_s) / 2;
+    us = us + corner_point_s;
-    *t = (*t + corner_point_t) / 2;
+    ut = ut + corner_point_t;
+
+    *s = us;
+    *t = ut;
+    *s /= 2;
+    *t /= 2;
   }
 
   void InvertDirection(int32_t *s, int32_t *t) const {
@@ -318,7 +330,7 @@ class OctahedronToolBox {
 
     // Remaining coordinate can be computed by projecting the (y, z) values onto
     // the surface of the octahedron.
-    const float x = 1.f - abs(y) - abs(z);
+    const float x = 1.f - std::abs(y) - std::abs(z);
 
     // |x| is essentially a signed distance from the diagonal edges of the
     // diamond shown on the figure above. It is positive for all points in the

contrib/draco/src/draco/compression/attributes/point_d_vector.h

@@ -16,7 +16,9 @@
 #ifndef DRACO_COMPRESSION_ATTRIBUTES_POINT_D_VECTOR_H_
 #define DRACO_COMPRESSION_ATTRIBUTES_POINT_D_VECTOR_H_
 
+#include <cstddef>
 #include <cstring>
+#include <iterator>
 #include <memory>
 #include <vector>
 
@@ -99,11 +101,17 @@ class PointDVector {
         data_(n_items * dimensionality),
         data0_(data_.data()) {}
   // random access iterator
-  class PointDVectorIterator
+  class PointDVectorIterator {
-      : public std::iterator<std::random_access_iterator_tag, size_t, size_t> {
     friend class PointDVector;
 
    public:
+    // Iterator traits expected by std libraries.
+    using iterator_category = std::random_access_iterator_tag;
+    using value_type = size_t;
+    using difference_type = size_t;
+    using pointer = PointDVector *;
+    using reference = PointDVector &;
+
     // std::iter_swap is called inside of std::partition and needs this
     // specialized support
     PseudoPointD<internal_t> operator*() const {

contrib/draco/src/draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_constrained_multi_parallelogram_decoder.h

@@ -22,6 +22,7 @@
 #include "draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_decoder.h"
 #include "draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_parallelogram_shared.h"
 #include "draco/compression/bit_coders/rans_bit_decoder.h"
+#include "draco/core/math_utils.h"
 #include "draco/core/varint_decoding.h"
 #include "draco/draco_features.h"
 
@@ -161,7 +162,8 @@ bool MeshPredictionSchemeConstrainedMultiParallelogramDecoder<
         if (!is_crease) {
           ++num_used_parallelograms;
           for (int j = 0; j < num_components; ++j) {
-            multi_pred_vals[j] += pred_vals[i][j];
+            multi_pred_vals[j] =
+                AddAsUnsigned(multi_pred_vals[j], pred_vals[i][j]);
           }
         }
       }
@@ -210,6 +212,9 @@ bool MeshPredictionSchemeConstrainedMultiParallelogramDecoder<
     if (!DecodeVarint<uint32_t>(&num_flags, buffer)) {
       return false;
     }
+    if (num_flags > this->mesh_data().corner_table()->num_corners()) {
+      return false;
+    }
     if (num_flags > 0) {
       is_crease_edge_[i].resize(num_flags);
       RAnsBitDecoder decoder;

contrib/draco/src/draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_constrained_multi_parallelogram_encoder.h

@@ -392,7 +392,7 @@ bool MeshPredictionSchemeConstrainedMultiParallelogramEncoder<
       RAnsBitEncoder encoder;
       encoder.StartEncoding();
       // Encode the crease edge flags in the reverse vertex order that is needed
-      // be the decoder. Note that for the currently supported mode, each vertex
+      // by the decoder. Note that for the currently supported mode, each vertex
       // has exactly |num_used_parallelograms| edges that need to be encoded.
       for (int j = static_cast<int>(is_crease_edge_[i].size()) -
                    num_used_parallelograms;

contrib/draco/src/draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_multi_parallelogram_decoder.h

@@ -18,6 +18,7 @@
 
 #include "draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_decoder.h"
 #include "draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_parallelogram_shared.h"
+#include "draco/core/math_utils.h"
 #include "draco/draco_features.h"
 
 namespace draco {
@@ -89,7 +90,8 @@ bool MeshPredictionSchemeMultiParallelogramDecoder<DataTypeT, TransformT,
               p, corner_id, table, *vertex_to_data_map, out_data,
               num_components, parallelogram_pred_vals.get())) {
         for (int c = 0; c < num_components; ++c) {
-          pred_vals[c] += parallelogram_pred_vals[c];
+          pred_vals[c] =
+              AddAsUnsigned(pred_vals[c], parallelogram_pred_vals[c]);
         }
         ++num_parallelograms;
       }

contrib/draco/src/draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_tex_coords_decoder.h

@@ -105,7 +105,7 @@ class MeshPredictionSchemeTexCoordsDecoder
                     static_cast<float>(data[data_offset + 1]));
   }
 
-  void ComputePredictedValue(CornerIndex corner_id, const DataTypeT *data,
+  bool ComputePredictedValue(CornerIndex corner_id, const DataTypeT *data,
                              int data_id);
 
  private:
@@ -123,6 +123,10 @@ bool MeshPredictionSchemeTexCoordsDecoder<DataTypeT, TransformT, MeshDataT>::
     ComputeOriginalValues(const CorrType *in_corr, DataTypeT *out_data,
                           int /* size */, int num_components,
                           const PointIndex *entry_to_point_id_map) {
+  if (num_components != 2) {
+    // Corrupt/malformed input. Two output components are req'd.
+    return false;
+  }
   num_components_ = num_components;
   entry_to_point_id_map_ = entry_to_point_id_map;
   predicted_value_ =
@@ -133,7 +137,9 @@ bool MeshPredictionSchemeTexCoordsDecoder<DataTypeT, TransformT, MeshDataT>::
       static_cast<int>(this->mesh_data().data_to_corner_map()->size());
   for (int p = 0; p < corner_map_size; ++p) {
     const CornerIndex corner_id = this->mesh_data().data_to_corner_map()->at(p);
-    ComputePredictedValue(corner_id, out_data, p);
+    if (!ComputePredictedValue(corner_id, out_data, p)) {
+      return false;
+    }
 
     const int dst_offset = p * num_components;
     this->transform().ComputeOriginalValue(
@@ -159,6 +165,11 @@ bool MeshPredictionSchemeTexCoordsDecoder<DataTypeT, TransformT, MeshDataT>::
   if (num_orientations == 0) {
     return false;
   }
+  if (num_orientations > this->mesh_data().corner_table()->num_corners()) {
+    // We can't have more orientations than the maximum number of decoded
+    // values.
+    return false;
+  }
   orientations_.resize(num_orientations);
   bool last_orientation = true;
   RAnsBitDecoder decoder;
@@ -177,7 +188,7 @@ bool MeshPredictionSchemeTexCoordsDecoder<DataTypeT, TransformT, MeshDataT>::
 }
 
 template <typename DataTypeT, class TransformT, class MeshDataT>
-void MeshPredictionSchemeTexCoordsDecoder<DataTypeT, TransformT, MeshDataT>::
+bool MeshPredictionSchemeTexCoordsDecoder<DataTypeT, TransformT, MeshDataT>::
     ComputePredictedValue(CornerIndex corner_id, const DataTypeT *data,
                           int data_id) {
   // Compute the predicted UV coordinate from the positions on all corners
@@ -206,9 +217,17 @@ void MeshPredictionSchemeTexCoordsDecoder<DataTypeT, TransformT, MeshDataT>::
     const Vector2f p_uv = GetTexCoordForEntryId(prev_data_id, data);
     if (p_uv == n_uv) {
       // We cannot do a reliable prediction on degenerated UV triangles.
-      predicted_value_[0] = static_cast<int>(p_uv[0]);
+      // Technically floats > INT_MAX are undefined, but compilers will
-      predicted_value_[1] = static_cast<int>(p_uv[1]);
+      // convert those values to INT_MIN. We are being explicit here for asan.
-      return;
+      for (const int i : {0, 1}) {
+        if (std::isnan(p_uv[i]) || static_cast<double>(p_uv[i]) > INT_MAX ||
+            static_cast<double>(p_uv[i]) < INT_MIN) {
+          predicted_value_[i] = INT_MIN;
+        } else {
+          predicted_value_[i] = static_cast<int>(p_uv[i]);
+        }
+      }
+      return true;
     }
 
     // Get positions at all corners.
@@ -282,32 +301,40 @@ void MeshPredictionSchemeTexCoordsDecoder<DataTypeT, TransformT, MeshDataT>::
     const float pnvs = pn_uv[1] * s + n_uv[1];
     const float pnvt = pn_uv[1] * t;
     Vector2f predicted_uv;
+    if (orientations_.empty()) {
+      return false;
+    }
 
     // When decoding the data, we already know which orientation to use.
     const bool orientation = orientations_.back();
     orientations_.pop_back();
-    if (orientation)
+    if (orientation) {
       predicted_uv = Vector2f(pnus - pnvt, pnvs + pnut);
-    else
+    } else {
       predicted_uv = Vector2f(pnus + pnvt, pnvs - pnut);
-
+    }
     if (std::is_integral<DataTypeT>::value) {
       // Round the predicted value for integer types.
-      if (std::isnan(predicted_uv[0])) {
+      // Technically floats > INT_MAX are undefined, but compilers will
+      // convert those values to INT_MIN. We are being explicit here for asan.
+      const double u = floor(predicted_uv[0] + 0.5);
+      if (std::isnan(u) || u > INT_MAX || u < INT_MIN) {
         predicted_value_[0] = INT_MIN;
       } else {
-        predicted_value_[0] = static_cast<int>(floor(predicted_uv[0] + 0.5));
+        predicted_value_[0] = static_cast<int>(u);
       }
-      if (std::isnan(predicted_uv[1])) {
+      const double v = floor(predicted_uv[1] + 0.5);
+      if (std::isnan(v) || v > INT_MAX || v < INT_MIN) {
         predicted_value_[1] = INT_MIN;
       } else {
-        predicted_value_[1] = static_cast<int>(floor(predicted_uv[1] + 0.5));
+        predicted_value_[1] = static_cast<int>(v);
       }
     } else {
       predicted_value_[0] = static_cast<int>(predicted_uv[0]);
       predicted_value_[1] = static_cast<int>(predicted_uv[1]);
     }
-    return;
+
+    return true;
   }
   // Else we don't have available textures on both corners. For such case we
   // can't use positions for predicting the uv value and we resort to delta
@@ -330,12 +357,13 @@ void MeshPredictionSchemeTexCoordsDecoder<DataTypeT, TransformT, MeshDataT>::
       for (int i = 0; i < num_components_; ++i) {
         predicted_value_[i] = 0;
       }
-      return;
+      return true;
     }
   }
   for (int i = 0; i < num_components_; ++i) {
     predicted_value_[i] = data[data_offset + i];
   }
+  return true;
 }
 
 }  // namespace draco

contrib/draco/src/draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_tex_coords_portable_encoder.h

@@ -98,7 +98,10 @@ bool MeshPredictionSchemeTexCoordsPortableEncoder<DataTypeT, TransformT,
            static_cast<int>(this->mesh_data().data_to_corner_map()->size() - 1);
        p >= 0; --p) {
     const CornerIndex corner_id = this->mesh_data().data_to_corner_map()->at(p);
-    predictor_.template ComputePredictedValue<true>(corner_id, in_data, p);
+    if (!predictor_.template ComputePredictedValue<true>(corner_id, in_data,
+                                                         p)) {
+      return false;
+    }
 
     const int dst_offset = p * num_components;
     this->transform().ComputeCorrection(in_data + dst_offset,

contrib/draco/src/draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_tex_coords_portable_predictor.h

@@ -17,6 +17,9 @@
 
 #include <math.h>
 
+#include <algorithm>
+#include <limits>
+
 #include "draco/attributes/point_attribute.h"
 #include "draco/core/math_utils.h"
 #include "draco/core/vector_d.h"
@@ -105,10 +108,14 @@ bool MeshPredictionSchemeTexCoordsPortablePredictor<
   next_data_id = mesh_data_.vertex_to_data_map()->at(next_vert_id);
   prev_data_id = mesh_data_.vertex_to_data_map()->at(prev_vert_id);
 
+  typedef VectorD<int64_t, 2> Vec2;
+  typedef VectorD<int64_t, 3> Vec3;
+  typedef VectorD<uint64_t, 2> Vec2u;
+
   if (prev_data_id < data_id && next_data_id < data_id) {
     // Both other corners have available UV coordinates for prediction.
-    const VectorD<int64_t, 2> n_uv = GetTexCoordForEntryId(next_data_id, data);
+    const Vec2 n_uv = GetTexCoordForEntryId(next_data_id, data);
-    const VectorD<int64_t, 2> p_uv = GetTexCoordForEntryId(prev_data_id, data);
+    const Vec2 p_uv = GetTexCoordForEntryId(prev_data_id, data);
     if (p_uv == n_uv) {
       // We cannot do a reliable prediction on degenerated UV triangles.
       predicted_value_[0] = p_uv[0];
@@ -117,9 +124,9 @@ bool MeshPredictionSchemeTexCoordsPortablePredictor<
     }
 
     // Get positions at all corners.
-    const VectorD<int64_t, 3> tip_pos = GetPositionForEntryId(data_id);
+    const Vec3 tip_pos = GetPositionForEntryId(data_id);
-    const VectorD<int64_t, 3> next_pos = GetPositionForEntryId(next_data_id);
+    const Vec3 next_pos = GetPositionForEntryId(next_data_id);
-    const VectorD<int64_t, 3> prev_pos = GetPositionForEntryId(prev_data_id);
+    const Vec3 prev_pos = GetPositionForEntryId(prev_data_id);
     // We use the positions of the above triangle to predict the texture
     // coordinate on the tip corner C.
     // To convert the triangle into the UV coordinate system we first compute
@@ -135,17 +142,17 @@ bool MeshPredictionSchemeTexCoordsPortablePredictor<
     // Where next_pos is point (N), prev_pos is point (P) and tip_pos is the
     // position of predicted coordinate (C).
     //
-    const VectorD<int64_t, 3> pn = prev_pos - next_pos;
+    const Vec3 pn = prev_pos - next_pos;
     const uint64_t pn_norm2_squared = pn.SquaredNorm();
     if (pn_norm2_squared != 0) {
       // Compute the projection of C onto PN by computing dot product of CN with
       // PN and normalizing it by length of PN. This gives us a factor |s| where
       // |s = PN.Dot(CN) / PN.SquaredNorm2()|. This factor can be used to
       // compute X in UV space |X_UV| as |X_UV = N_UV + s * PN_UV|.
-      const VectorD<int64_t, 3> cn = tip_pos - next_pos;
+      const Vec3 cn = tip_pos - next_pos;
       const int64_t cn_dot_pn = pn.Dot(cn);
 
-      const VectorD<int64_t, 2> pn_uv = p_uv - n_uv;
+      const Vec2 pn_uv = p_uv - n_uv;
       // Because we perform all computations with integers, we don't explicitly
       // compute the normalized factor |s|, but rather we perform all operations
       // over UV vectors in a non-normalized coordinate system scaled with a
@@ -153,19 +160,30 @@ bool MeshPredictionSchemeTexCoordsPortablePredictor<
       //
       //      x_uv = X_UV * PN.Norm2Squared()
       //
-      const VectorD<int64_t, 2> x_uv =
+      const int64_t n_uv_absmax_element =
-          n_uv * pn_norm2_squared + (cn_dot_pn * pn_uv);
+          std::max(std::abs(n_uv[0]), std::abs(n_uv[1]));
-
+      if (n_uv_absmax_element >
+          std::numeric_limits<int64_t>::max() / pn_norm2_squared) {
+        // Return false if the below multiplication would overflow.
+        return false;
+      }
+      const int64_t pn_uv_absmax_element =
+          std::max(std::abs(pn_uv[0]), std::abs(pn_uv[1]));
+      if (cn_dot_pn >
+          std::numeric_limits<int64_t>::max() / pn_uv_absmax_element) {
+        // Return false if squared length calculation would overflow.
+        return false;
+      }
+      const Vec2 x_uv = n_uv * pn_norm2_squared + (cn_dot_pn * pn_uv);
       const int64_t pn_absmax_element =
           std::max(std::max(std::abs(pn[0]), std::abs(pn[1])), std::abs(pn[2]));
       if (cn_dot_pn > std::numeric_limits<int64_t>::max() / pn_absmax_element) {
-        // return false if squared length calculation would overflow.
+        // Return false if squared length calculation would overflow.
         return false;
       }
 
       // Compute squared length of vector CX in position coordinate system:
-      const VectorD<int64_t, 3> x_pos =
+      const Vec3 x_pos = next_pos + (cn_dot_pn * pn) / pn_norm2_squared;
-          next_pos + (cn_dot_pn * pn) / pn_norm2_squared;
       const uint64_t cx_norm2_squared = (tip_pos - x_pos).SquaredNorm();
 
       // Compute vector CX_UV in the uv space by rotating vector PN_UV by 90
@@ -182,7 +200,7 @@ bool MeshPredictionSchemeTexCoordsPortablePredictor<
       //
       //     cx_uv = CX.Norm2() * PN.Norm2() * Rot(PN_UV)
       //
-      VectorD<int64_t, 2> cx_uv(pn_uv[1], -pn_uv[0]);  // Rotated PN_UV.
+      Vec2 cx_uv(pn_uv[1], -pn_uv[0]);  // Rotated PN_UV.
       // Compute CX.Norm2() * PN.Norm2()
       const uint64_t norm_squared =
           IntSqrt(cx_norm2_squared * pn_norm2_squared);
@@ -191,17 +209,15 @@ bool MeshPredictionSchemeTexCoordsPortablePredictor<
 
       // Predicted uv coordinate is then computed by either adding or
       // subtracting CX_UV to/from X_UV.
-      VectorD<int64_t, 2> predicted_uv;
+      Vec2 predicted_uv;
       if (is_encoder_t) {
         // When encoding, compute both possible vectors and determine which one
         // results in a better prediction.
         // Both vectors need to be transformed back from the scaled space to
         // the real UV coordinate space.
-        const VectorD<int64_t, 2> predicted_uv_0((x_uv + cx_uv) /
+        const Vec2 predicted_uv_0((x_uv + cx_uv) / pn_norm2_squared);
-                                                 pn_norm2_squared);
+        const Vec2 predicted_uv_1((x_uv - cx_uv) / pn_norm2_squared);
-        const VectorD<int64_t, 2> predicted_uv_1((x_uv - cx_uv) /
+        const Vec2 c_uv = GetTexCoordForEntryId(data_id, data);
-                                                 pn_norm2_squared);
-        const VectorD<int64_t, 2> c_uv = GetTexCoordForEntryId(data_id, data);
         if ((c_uv - predicted_uv_0).SquaredNorm() <
             (c_uv - predicted_uv_1).SquaredNorm()) {
           predicted_uv = predicted_uv_0;
@@ -217,10 +233,12 @@ bool MeshPredictionSchemeTexCoordsPortablePredictor<
         }
         const bool orientation = orientations_.back();
         orientations_.pop_back();
+        // Perform operations in unsigned type to avoid signed integer overflow.
+        // Note that the result will be the same (for non-overflowing values).
         if (orientation) {
-          predicted_uv = (x_uv + cx_uv) / pn_norm2_squared;
+          predicted_uv = Vec2(Vec2u(x_uv) + Vec2u(cx_uv)) / pn_norm2_squared;
         } else {
-          predicted_uv = (x_uv - cx_uv) / pn_norm2_squared;
+          predicted_uv = Vec2(Vec2u(x_uv) - Vec2u(cx_uv)) / pn_norm2_squared;
         }
       }
       predicted_value_[0] = static_cast<int>(predicted_uv[0]);

contrib/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_encoder_factory.cc

@@ -18,22 +18,58 @@ namespace draco {
 
 PredictionSchemeMethod SelectPredictionMethod(
     int att_id, const PointCloudEncoder *encoder) {
-  if (encoder->options()->GetSpeed() >= 10) {
+  return SelectPredictionMethod(att_id, *encoder->options(), encoder);
+}
+
+PredictionSchemeMethod SelectPredictionMethod(
+    int att_id, const EncoderOptions &options,
+    const PointCloudEncoder *encoder) {
+  if (options.GetSpeed() >= 10) {
     // Selected fastest, though still doing some compression.
     return PREDICTION_DIFFERENCE;
   }
   if (encoder->GetGeometryType() == TRIANGULAR_MESH) {
     // Use speed setting to select the best encoding method.
+    const int att_quant =
+        options.GetAttributeInt(att_id, "quantization_bits", -1);
     const PointAttribute *const att = encoder->point_cloud()->attribute(att_id);
-    if (att->attribute_type() == GeometryAttribute::TEX_COORD) {
+    if (att_quant != -1 &&
-      if (encoder->options()->GetSpeed() < 4) {
+        att->attribute_type() == GeometryAttribute::TEX_COORD &&
+        att->num_components() == 2) {
+      // Texture coordinate predictor needs a position attribute that is either
+      // integer or quantized. For numerical reasons, we require the position
+      // quantization to be at most 21 bits and the 2*position_quantization +
+      // uv_quantization < 64 (TODO(b/231259902)).
+      const PointAttribute *const pos_att =
+          encoder->point_cloud()->GetNamedAttribute(
+              GeometryAttribute::POSITION);
+      bool is_pos_att_valid = false;
+      if (pos_att) {
+        if (IsDataTypeIntegral(pos_att->data_type())) {
+          is_pos_att_valid = true;
+        } else {
+          // Check quantization of the position attribute.
+          const int pos_att_id = encoder->point_cloud()->GetNamedAttributeId(
+              GeometryAttribute::POSITION);
+          const int pos_quant =
+              options.GetAttributeInt(pos_att_id, "quantization_bits", -1);
+          // Must be quantized but the quantization is restricted to 21 bits and
+          // 2*|pos_quant|+|att_quant| must be smaller than 64 bits.
+          if (pos_quant > 0 && pos_quant <= 21 &&
+              2 * pos_quant + att_quant < 64) {
+            is_pos_att_valid = true;
+          }
+        }
+      }
+
+      if (is_pos_att_valid && options.GetSpeed() < 4) {
         // Use texture coordinate prediction for speeds 0, 1, 2, 3.
         return MESH_PREDICTION_TEX_COORDS_PORTABLE;
       }
     }
     if (att->attribute_type() == GeometryAttribute::NORMAL) {
 #ifdef DRACO_NORMAL_ENCODING_SUPPORTED
-      if (encoder->options()->GetSpeed() < 4) {
+      if (options.GetSpeed() < 4) {
         // Use geometric normal prediction for speeds 0, 1, 2, 3.
         // For this prediction, the position attribute needs to be either
         // integer or quantized as well.
@@ -43,8 +79,8 @@ PredictionSchemeMethod SelectPredictionMethod(
             encoder->point_cloud()->GetNamedAttribute(
                 GeometryAttribute::POSITION);
         if (pos_att && (IsDataTypeIntegral(pos_att->data_type()) ||
-                        encoder->options()->GetAttributeInt(
+                        options.GetAttributeInt(pos_att_id, "quantization_bits",
-                            pos_att_id, "quantization_bits", -1) > 0)) {
+                                                -1) > 0)) {
           return MESH_PREDICTION_GEOMETRIC_NORMAL;
         }
       }
@@ -52,11 +88,10 @@ PredictionSchemeMethod SelectPredictionMethod(
       return PREDICTION_DIFFERENCE;  // default
     }
     // Handle other attribute types.
-    if (encoder->options()->GetSpeed() >= 8) {
+    if (options.GetSpeed() >= 8) {
       return PREDICTION_DIFFERENCE;
     }
-    if (encoder->options()->GetSpeed() >= 2 ||
+    if (options.GetSpeed() >= 2 || encoder->point_cloud()->num_points() < 40) {
-        encoder->point_cloud()->num_points() < 40) {
       // Parallelogram prediction is used for speeds 2 - 7 or when the overhead
       // of using constrained multi-parallelogram would be too high.
       return MESH_PREDICTION_PARALLELOGRAM;

contrib/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_encoder_factory.h

@@ -38,6 +38,10 @@ namespace draco {
 PredictionSchemeMethod SelectPredictionMethod(int att_id,
                                               const PointCloudEncoder *encoder);
 
+PredictionSchemeMethod SelectPredictionMethod(int att_id,
+                                              const EncoderOptions &options,
+                                              const PointCloudEncoder *encoder);
+
 // Factory class for creating mesh prediction schemes.
 template <typename DataTypeT>
 struct MeshPredictionSchemeEncoderFactory {
@@ -97,10 +101,11 @@ CreatePredictionSchemeForEncoder(PredictionSchemeMethod method, int att_id,
     // template nature of the prediction schemes).
     const MeshEncoder *const mesh_encoder =
         static_cast<const MeshEncoder *>(encoder);
+    const uint16_t bitstream_version = kDracoMeshBitstreamVersion;
     auto ret = CreateMeshPredictionScheme<
         MeshEncoder, PredictionSchemeEncoder<DataTypeT, TransformT>,
         MeshPredictionSchemeEncoderFactory<DataTypeT>>(
-        mesh_encoder, method, att_id, transform, kDracoMeshBitstreamVersion);
+        mesh_encoder, method, att_id, transform, bitstream_version);
     if (ret) {
       return ret;
     }

contrib/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_normal_octahedron_canonicalized_decoding_transform.h

@@ -21,6 +21,7 @@
 #include "draco/compression/attributes/prediction_schemes/prediction_scheme_normal_octahedron_canonicalized_transform_base.h"
 #include "draco/core/decoder_buffer.h"
 #include "draco/core/macros.h"
+#include "draco/core/math_utils.h"
 #include "draco/core/vector_d.h"
 
 namespace draco {
@@ -98,9 +99,8 @@ class PredictionSchemeNormalOctahedronCanonicalizedDecodingTransform
     if (!pred_is_in_bottom_left) {
       pred = this->RotatePoint(pred, rotation_count);
     }
-    Point2 orig = pred + corr;
+    Point2 orig(this->ModMax(AddAsUnsigned(pred[0], corr[0])),
-    orig[0] = this->ModMax(orig[0]);
+                this->ModMax(AddAsUnsigned(pred[1], corr[1])));
-    orig[1] = this->ModMax(orig[1]);
     if (!pred_is_in_bottom_left) {
       const int32_t reverse_rotation_count = (4 - rotation_count) % 4;
       orig = this->RotatePoint(orig, reverse_rotation_count);

contrib/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_normal_octahedron_canonicalized_transform_test.cc

@@ -25,10 +25,10 @@ class PredictionSchemeNormalOctahedronCanonicalizedTransformTest
       Transform;
   typedef Transform::Point2 Point2;
 
-  void TestComputeCorrection(const Transform &transform, const int32_t &ox,
+  void TestComputeCorrection(const Transform &transform, const int32_t ox,
-                             const int32_t &oy, const int32_t &px,
+                             const int32_t oy, const int32_t px,
-                             const int32_t &py, const int32_t &cx,
+                             const int32_t py, const int32_t cx,
-                             const int32_t &cy) {
+                             const int32_t cy) {
     const int32_t o[2] = {ox + 7, oy + 7};
     const int32_t p[2] = {px + 7, py + 7};
     int32_t corr[2] = {500, 500};
@@ -38,7 +38,7 @@ class PredictionSchemeNormalOctahedronCanonicalizedTransformTest
   }
 
   void TestGetRotationCount(const Transform &transform, const Point2 &pred,
-                            const int32_t &rot_dir) {
+                            const int32_t rot_dir) {
     const int32_t rotation_count = transform.GetRotationCount(pred);
     ASSERT_EQ(rot_dir, rotation_count);
   }

contrib/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_normal_octahedron_decoding_transform.h

@@ -80,19 +80,31 @@ class PredictionSchemeNormalOctahedronDecodingTransform
  private:
   Point2 ComputeOriginalValue(Point2 pred, const Point2 &corr) const {
     const Point2 t(this->center_value(), this->center_value());
-    pred = pred - t;
+    typedef typename std::make_unsigned<DataTypeT>::type UnsignedDataTypeT;
+    typedef VectorD<UnsignedDataTypeT, 2> Point2u;
+
+    // Perform the addition in unsigned type to avoid signed integer overflow.
+    // Note that the result will be the same (for non-overflowing values).
+    pred = Point2(Point2u(pred) - Point2u(t));
 
     const bool pred_is_in_diamond = this->IsInDiamond(pred[0], pred[1]);
     if (!pred_is_in_diamond) {
       this->InvertDiamond(&pred[0], &pred[1]);
     }
-    Point2 orig = pred + corr;
+
+    // Perform the addition in unsigned type to avoid signed integer overflow.
+    // Note that the result will be the same (for non-overflowing values).
+    Point2 orig(Point2u(pred) + Point2u(corr));
+
     orig[0] = this->ModMax(orig[0]);
     orig[1] = this->ModMax(orig[1]);
     if (!pred_is_in_diamond) {
       this->InvertDiamond(&orig[0], &orig[1]);
     }
-    orig = orig + t;
+
+    // Perform the addition in unsigned type to avoid signed integer overflow.
+    // Note that the result will be the same (for non-overflowing values).
+    orig = Point2(Point2u(orig) + Point2u(t));
     return orig;
   }
 };

contrib/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_normal_octahedron_transform_test.cc

@@ -23,10 +23,10 @@ class PredictionSchemeNormalOctahedronTransformTest : public ::testing::Test {
       Transform;
   typedef Transform::Point2 Point2;
 
-  void TestComputeCorrection(const Transform &transform, const int32_t &ox,
+  void TestComputeCorrection(const Transform &transform, const int32_t ox,
-                             const int32_t &oy, const int32_t &px,
+                             const int32_t oy, const int32_t px,
-                             const int32_t &py, const int32_t &cx,
+                             const int32_t py, const int32_t cx,
-                             const int32_t &cy) {
+                             const int32_t cy) {
     const int32_t o[2] = {ox + 7, oy + 7};
     const int32_t p[2] = {px + 7, py + 7};
     int32_t corr[2] = {500, 500};

contrib/draco/src/draco/compression/attributes/prediction_schemes/prediction_scheme_wrap_transform_base.h

@@ -70,10 +70,10 @@ class PredictionSchemeWrapTransformBase {
         clamped_value_[i] = predicted_val[i];
       }
     }
-    return &clamped_value_[0];
+    return clamped_value_.data();
   }
 
-  // TODO(hemmer): Consider refactoring to avoid this dummy.
+  // TODO(b/199760123): Consider refactoring to avoid this dummy.
   int quantization_bits() const {
     DRACO_DCHECK(false);
     return -1;

contrib/draco/src/draco/compression/attributes/sequential_integer_attribute_decoder.cc

@@ -148,11 +148,12 @@ bool SequentialIntegerAttributeDecoder::DecodeIntegerValues(
         return false;
       }
       for (size_t i = 0; i < num_values; ++i) {
-        if (!in_buffer->Decode(portable_attribute_data + i, num_bytes))
+        if (!in_buffer->Decode(portable_attribute_data + i, num_bytes)) {
           return false;
         }
       }
     }
+  }
 
   if (num_values > 0 && (prediction_scheme_ == nullptr ||
                          !prediction_scheme_->AreCorrectionsPositive())) {
@@ -228,12 +229,13 @@ void SequentialIntegerAttributeDecoder::StoreTypedValues(uint32_t num_values) {
 
 void SequentialIntegerAttributeDecoder::PreparePortableAttribute(
     int num_entries, int num_components) {
-  GeometryAttribute va;
+  GeometryAttribute ga;
-  va.Init(attribute()->attribute_type(), nullptr, num_components, DT_INT32,
+  ga.Init(attribute()->attribute_type(), nullptr, num_components, DT_INT32,
           false, num_components * DataTypeLength(DT_INT32), 0);
-  std::unique_ptr<PointAttribute> port_att(new PointAttribute(va));
+  std::unique_ptr<PointAttribute> port_att(new PointAttribute(ga));
   port_att->SetIdentityMapping();
   port_att->Reset(num_entries);
+  port_att->set_unique_id(attribute()->unique_id());
   SetPortableAttribute(std::move(port_att));
 }
 

contrib/draco/src/draco/compression/attributes/sequential_integer_attribute_encoder.cc

@@ -138,9 +138,11 @@ bool SequentialIntegerAttributeEncoder::EncodeValues(
   // All integer values are initialized. Process them using the prediction
   // scheme if we have one.
   if (prediction_scheme_) {
-    prediction_scheme_->ComputeCorrectionValues(
+    if (!prediction_scheme_->ComputeCorrectionValues(
-        portable_attribute_data, &encoded_data[0], num_values, num_components,
+            portable_attribute_data, &encoded_data[0], num_values,
-        point_ids.data());
+            num_components, point_ids.data())) {
+      return false;
+    }
   }
 
   if (prediction_scheme_ == nullptr ||

contrib/draco/src/draco/compression/attributes/sequential_normal_attribute_encoder.cc

@@ -20,8 +20,9 @@ namespace draco {
 
 bool SequentialNormalAttributeEncoder::Init(PointCloudEncoder *encoder,
                                             int attribute_id) {
-  if (!SequentialIntegerAttributeEncoder::Init(encoder, attribute_id))
+  if (!SequentialIntegerAttributeEncoder::Init(encoder, attribute_id)) {
     return false;
+  }
   // Currently this encoder works only for 3-component normal vectors.
   if (attribute()->num_components() != 3) {
     return false;

contrib/draco/src/draco/compression/bit_coders/direct_bit_decoder.h

@@ -47,14 +47,13 @@ class DirectBitDecoder {
 
   // Decode the next |nbits| and return the sequence in |value|. |nbits| must be
   // > 0 and <= 32.
-  void DecodeLeastSignificantBits32(int nbits, uint32_t *value) {
+  bool DecodeLeastSignificantBits32(int nbits, uint32_t *value) {
     DRACO_DCHECK_EQ(true, nbits <= 32);
     DRACO_DCHECK_EQ(true, nbits > 0);
     const int remaining = 32 - num_used_bits_;
     if (nbits <= remaining) {
       if (pos_ == bits_.end()) {
-        *value = 0;
+        return false;
-        return;
       }
       *value = (*pos_ << num_used_bits_) >> (32 - nbits);
       num_used_bits_ += nbits;
@@ -64,8 +63,7 @@ class DirectBitDecoder {
       }
     } else {
       if (pos_ + 1 == bits_.end()) {
-        *value = 0;
+        return false;
-        return;
       }
       const uint32_t value_l = ((*pos_) << num_used_bits_);
       num_used_bits_ = nbits - remaining;
@@ -73,6 +71,7 @@ class DirectBitDecoder {
       const uint32_t value_r = (*pos_) >> (32 - num_used_bits_);
       *value = (value_l >> (32 - num_used_bits_ - remaining)) | value_r;
     }
+    return true;
   }
 
   void EndDecoding() {}

contrib/draco/src/draco/compression/config/encoder_options.h

@@ -65,6 +65,10 @@ class EncoderOptionsBase : public DracoOptions<AttributeKeyT> {
     this->SetGlobalInt("encoding_speed", encoding_speed);
     this->SetGlobalInt("decoding_speed", decoding_speed);
   }
+  bool IsSpeedSet() const {
+    return this->IsGlobalOptionSet("encoding_speed") ||
+           this->IsGlobalOptionSet("decoding_speed");
+  }
 
   // Sets a given feature as supported or unsupported by the target decoder.
   // Encoder will always use only supported features when encoding the input

contrib/draco/src/draco/compression/decode_test.cc

@@ -17,9 +17,11 @@
 #include <cinttypes>
 #include <sstream>
 
+#include "draco/compression/encode.h"
 #include "draco/core/draco_test_base.h"
 #include "draco/core/draco_test_utils.h"
 #include "draco/io/file_utils.h"
+#include "draco/io/obj_encoder.h"
 
 namespace {
 
@@ -166,4 +168,78 @@ TEST_F(DecodeTest, TestSkipAttributeTransformWithNoQuantization) {
   ASSERT_EQ(pos_att->GetAttributeTransformData(), nullptr);
 }
 
+TEST_F(DecodeTest, TestSkipAttributeTransformUniqueId) {
+  // Tests that decoders preserve unique id of attributes even when their
+  // attribute transforms are skipped.
+  const std::string file_name = "cube_att.obj";
+  auto src_mesh = draco::ReadMeshFromTestFile(file_name);
+  ASSERT_NE(src_mesh, nullptr);
+
+  constexpr int kPosUniqueId = 7;
+  constexpr int kNormUniqueId = 42;
+  // Set unique ids for some of the attributes.
+  src_mesh
+      ->attribute(
+          src_mesh->GetNamedAttributeId(draco::GeometryAttribute::POSITION))
+      ->set_unique_id(kPosUniqueId);
+  src_mesh
+      ->attribute(
+          src_mesh->GetNamedAttributeId(draco::GeometryAttribute::NORMAL))
+      ->set_unique_id(kNormUniqueId);
+
+  draco::EncoderBuffer encoder_buffer;
+  draco::Encoder encoder;
+  encoder.SetAttributeQuantization(draco::GeometryAttribute::POSITION, 10);
+  encoder.SetAttributeQuantization(draco::GeometryAttribute::NORMAL, 11);
+  encoder.EncodeMeshToBuffer(*src_mesh, &encoder_buffer);
+
+  // Create a draco decoding buffer.
+  draco::DecoderBuffer buffer;
+  buffer.Init(encoder_buffer.data(), encoder_buffer.size());
+
+  // First we decode the mesh without skipping the attribute transforms.
+  draco::Decoder decoder_no_skip;
+  std::unique_ptr<draco::Mesh> mesh_no_skip =
+      decoder_no_skip.DecodeMeshFromBuffer(&buffer).value();
+  ASSERT_NE(mesh_no_skip, nullptr);
+
+  // Now we decode it again while skipping some attributes.
+  draco::Decoder decoder_skip;
+  // Make sure we skip dequantization for the position and normal attribute.
+  decoder_skip.SetSkipAttributeTransform(draco::GeometryAttribute::POSITION);
+  decoder_skip.SetSkipAttributeTransform(draco::GeometryAttribute::NORMAL);
+
+  // Decode the input data into a geometry.
+  buffer.Init(encoder_buffer.data(), encoder_buffer.size());
+  std::unique_ptr<draco::Mesh> mesh_skip =
+      decoder_skip.DecodeMeshFromBuffer(&buffer).value();
+  ASSERT_NE(mesh_skip, nullptr);
+
+  // Compare the unique ids.
+  const draco::PointAttribute *const pos_att_no_skip =
+      mesh_no_skip->GetNamedAttribute(draco::GeometryAttribute::POSITION);
+  ASSERT_NE(pos_att_no_skip, nullptr);
+  ASSERT_EQ(pos_att_no_skip->data_type(), draco::DataType::DT_FLOAT32);
+
+  const draco::PointAttribute *const pos_att_skip =
+      mesh_skip->GetNamedAttribute(draco::GeometryAttribute::POSITION);
+  ASSERT_NE(pos_att_skip, nullptr);
+  ASSERT_EQ(pos_att_skip->data_type(), draco::DataType::DT_INT32);
+
+  const draco::PointAttribute *const norm_att_no_skip =
+      mesh_no_skip->GetNamedAttribute(draco::GeometryAttribute::NORMAL);
+  ASSERT_NE(norm_att_no_skip, nullptr);
+  ASSERT_EQ(norm_att_no_skip->data_type(), draco::DataType::DT_FLOAT32);
+
+  const draco::PointAttribute *const norm_att_skip =
+      mesh_skip->GetNamedAttribute(draco::GeometryAttribute::NORMAL);
+  ASSERT_NE(norm_att_skip, nullptr);
+  ASSERT_EQ(norm_att_skip->data_type(), draco::DataType::DT_INT32);
+
+  ASSERT_EQ(pos_att_skip->unique_id(), pos_att_no_skip->unique_id());
+  ASSERT_EQ(norm_att_skip->unique_id(), norm_att_no_skip->unique_id());
+  std::cout << pos_att_skip->unique_id() << " " << norm_att_skip->unique_id()
+            << std::endl;
+}
+
 }  // namespace

contrib/draco/src/draco/compression/draco_compression_options.cc

@@ -0,0 +1,59 @@
+// Copyright 2022 The Draco Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#include "draco/compression/draco_compression_options.h"
+
+#ifdef DRACO_TRANSCODER_SUPPORTED
+
+namespace draco {
+
+SpatialQuantizationOptions::SpatialQuantizationOptions(int quantization_bits) {
+  SetQuantizationBits(quantization_bits);
+}
+
+void SpatialQuantizationOptions::SetQuantizationBits(int quantization_bits) {
+  mode_ = LOCAL_QUANTIZATION_BITS;
+  quantization_bits_ = quantization_bits;
+}
+
+bool SpatialQuantizationOptions::AreQuantizationBitsDefined() const {
+  return mode_ == LOCAL_QUANTIZATION_BITS;
+}
+
+SpatialQuantizationOptions &SpatialQuantizationOptions::SetGrid(float spacing) {
+  mode_ = GLOBAL_GRID;
+  spacing_ = spacing;
+  return *this;
+}
+
+bool SpatialQuantizationOptions::operator==(
+    const SpatialQuantizationOptions &other) const {
+  if (mode_ != other.mode_) {
+    return false;
+  }
+  if (mode_ == LOCAL_QUANTIZATION_BITS) {
+    if (quantization_bits_ != other.quantization_bits_) {
+      return false;
+    }
+  } else if (mode_ == GLOBAL_GRID) {
+    if (spacing_ != other.spacing_) {
+      return false;
+    }
+  }
+  return true;
+}
+
+}  // namespace draco
+
+#endif  // DRACO_TRANSCODER_SUPPORTED

contrib/draco/src/draco/compression/draco_compression_options.h

@@ -0,0 +1,141 @@
+// Copyright 2019 The Draco Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#ifndef DRACO_COMPRESSION_DRACO_COMPRESSION_OPTIONS_H_
+#define DRACO_COMPRESSION_DRACO_COMPRESSION_OPTIONS_H_
+
+#include "draco/draco_features.h"
+
+#ifdef DRACO_TRANSCODER_SUPPORTED
+#include "draco/core/status.h"
+
+namespace draco {
+
+// Quantization options for positions. Currently there are two modes for
+// quantizing positions:
+//
+//   1. Quantization bits:
+//        - User defined number of quantization bits that is evenly distributed
+//          to cover the compressed geometry.
+//   2. Grid:
+//        - Positions are snapped to a global grid defined by grid spacing.
+//        - This method is primarily intended to be used when the location of
+//          quantized vertices needs to be consistent between multiple
+//          geometries.
+class SpatialQuantizationOptions {
+ public:
+  explicit SpatialQuantizationOptions(int quantization_bits);
+
+  // Sets quantization bits that are going to be used for the compressed
+  // geometry. If the geometry is a scene, the same number of quantization bits
+  // is going to be applied to each mesh of the scene. Quantized values are
+  // going to be distributed within the bounds of individual meshes.
+  void SetQuantizationBits(int quantization_bits);
+
+  // If this returns true, quantization_bits() should be used to get the
+  // desired number of quantization bits for compression. Otherwise the grid
+  // mode is selected and spacing() should be used to get the desired grid
+  // spacing.
+  bool AreQuantizationBitsDefined() const;
+  const int quantization_bits() const { return quantization_bits_; }
+
+  // Defines quantization grid used for the compressed geometry. All vertices
+  // are going to be snapped to the nearest grid vertex that corresponds to an
+  // integer quantized position. |spacing| defines the distance between two grid
+  // vertices. E.g. a grid with |spacing| = 10 would have grid vertices at
+  // locations {10 * i, 10 * j, 10 * k} where i, j, k are integer numbers.
+  SpatialQuantizationOptions &SetGrid(float spacing);
+
+  const float spacing() const { return spacing_; }
+
+  bool operator==(const SpatialQuantizationOptions &other) const;
+
+ private:
+  enum Mode { LOCAL_QUANTIZATION_BITS, GLOBAL_GRID };
+  Mode mode_ = LOCAL_QUANTIZATION_BITS;
+  int quantization_bits_;  // Default quantization bits for positions.
+  float spacing_ = 0.f;
+};
+
+// TODO(fgalligan): Add support for unified_position_quantization.
+// Struct to hold Draco compression options.
+struct DracoCompressionOptions {
+  int compression_level = 7;  // compression level [0-10], most=10, least=0.
+  SpatialQuantizationOptions quantization_position{11};
+  int quantization_bits_normal = 8;
+  int quantization_bits_tex_coord = 10;
+  int quantization_bits_color = 8;
+  int quantization_bits_generic = 8;
+  int quantization_bits_tangent = 8;
+  int quantization_bits_weight = 8;
+  bool find_non_degenerate_texture_quantization = false;
+
+  bool operator==(const DracoCompressionOptions &other) const {
+    return compression_level == other.compression_level &&
+           quantization_position == other.quantization_position &&
+           quantization_bits_normal == other.quantization_bits_normal &&
+           quantization_bits_tex_coord == other.quantization_bits_tex_coord &&
+           quantization_bits_color == other.quantization_bits_color &&
+           quantization_bits_generic == other.quantization_bits_generic &&
+           quantization_bits_tangent == other.quantization_bits_tangent &&
+           quantization_bits_weight == other.quantization_bits_weight &&
+           find_non_degenerate_texture_quantization ==
+               other.find_non_degenerate_texture_quantization;
+  }
+
+  bool operator!=(const DracoCompressionOptions &other) const {
+    return !(*this == other);
+  }
+
+  Status Check() const {
+    DRACO_RETURN_IF_ERROR(
+        Validate("Compression level", compression_level, 0, 10));
+    if (quantization_position.AreQuantizationBitsDefined()) {
+      DRACO_RETURN_IF_ERROR(Validate("Position quantization",
+                                     quantization_position.quantization_bits(),
+                                     0, 30));
+    } else {
+      if (quantization_position.spacing() <= 0.f) {
+        return ErrorStatus("Position quantization spacing is invalid.");
+      }
+    }
+    DRACO_RETURN_IF_ERROR(
+        Validate("Normals quantization", quantization_bits_normal, 0, 30));
+    DRACO_RETURN_IF_ERROR(
+        Validate("Tex coord quantization", quantization_bits_tex_coord, 0, 30));
+    DRACO_RETURN_IF_ERROR(
+        Validate("Color quantization", quantization_bits_color, 0, 30));
+    DRACO_RETURN_IF_ERROR(
+        Validate("Generic quantization", quantization_bits_generic, 0, 30));
+    DRACO_RETURN_IF_ERROR(
+        Validate("Tangent quantization", quantization_bits_tangent, 0, 30));
+    DRACO_RETURN_IF_ERROR(
+        Validate("Weights quantization", quantization_bits_weight, 0, 30));
+    return OkStatus();
+  }
+
+  static Status Validate(const std::string &name, int value, int min, int max) {
+    if (value < min || value > max) {
+      const std::string range =
+          "[" + std::to_string(min) + "-" + std::to_string(max) + "].";
+      return Status(Status::DRACO_ERROR, name + " is out of range " + range);
+    }
+    return OkStatus();
+  }
+};
+
+}  // namespace draco
+
+#endif  // DRACO_TRANSCODER_SUPPORTED
+#endif  // DRACO_COMPRESSION_DRACO_COMPRESSION_OPTIONS_H_

contrib/draco/src/draco/compression/draco_compression_options_test.cc

@@ -0,0 +1,45 @@
+#include "draco/compression/draco_compression_options.h"
+
+#include "draco/core/draco_test_utils.h"
+
+#ifdef DRACO_TRANSCODER_SUPPORTED
+
+namespace {
+
+TEST(DracoCompressionOptionsTest, TestPositionQuantizationBits) {
+  // Test verifies that we can define draco compression options using
+  // quantization bits.
+  draco::SpatialQuantizationOptions options(10);
+
+  // Quantization bits should be used by default.
+  ASSERT_TRUE(options.AreQuantizationBitsDefined());
+  ASSERT_EQ(options.quantization_bits(), 10);
+
+  // Change the quantization bits.
+  options.SetQuantizationBits(9);
+  ASSERT_TRUE(options.AreQuantizationBitsDefined());
+  ASSERT_EQ(options.quantization_bits(), 9);
+
+  // If we select the grid, quantization bits should not be used.
+  options.SetGrid(0.5f);
+  ASSERT_FALSE(options.AreQuantizationBitsDefined());
+}
+
+TEST(DracoCompressionOptionsTest, TestPositionQuantizationGrid) {
+  // Test verifies that we can define draco compression options using
+  // quantization grid.
+  draco::SpatialQuantizationOptions options(10);
+
+  // Quantization bits should be used by default.
+  ASSERT_TRUE(options.AreQuantizationBitsDefined());
+
+  // Set the grid parameters.
+  options.SetGrid(0.25f);
+  ASSERT_FALSE(options.AreQuantizationBitsDefined());
+
+  ASSERT_EQ(options.spacing(), 0.25f);
+}
+
+}  // namespace
+
+#endif  // DRACO_TRANSCODER_SUPPORTED

contrib/draco/src/draco/compression/encode.h

@@ -129,7 +129,6 @@ class Encoder
   // call of EncodePointCloudToBuffer or EncodeMeshToBuffer is going to fail.
   void SetEncodingMethod(int encoding_method);
 
- protected:
   // Creates encoder options for the expert encoder used during the actual
   // encoding.
   EncoderOptions CreateExpertEncoderOptions(const PointCloud &pc) const;

contrib/draco/src/draco/compression/encode_base.h

@@ -98,7 +98,7 @@ class EncoderBase {
                       "Invalid prediction scheme for attribute type.");
       }
     }
-    // TODO(hemmer): Try to enable more prediction schemes for normals.
+    // TODO(b/199760123): Try to enable more prediction schemes for normals.
     if (att_type == GeometryAttribute::NORMAL) {
       if (!(prediction_scheme == PREDICTION_DIFFERENCE ||
             prediction_scheme == MESH_PREDICTION_GEOMETRIC_NORMAL)) {

contrib/draco/src/draco/compression/encode_test.cc

@@ -26,6 +26,7 @@
 #include "draco/core/draco_test_base.h"
 #include "draco/core/draco_test_utils.h"
 #include "draco/core/vector_d.h"
+#include "draco/io/file_utils.h"
 #include "draco/io/obj_decoder.h"
 #include "draco/mesh/triangle_soup_mesh_builder.h"
 #include "draco/point_cloud/point_cloud_builder.h"
@@ -213,16 +214,14 @@ class EncodeTest : public ::testing::Test {
     draco::Decoder decoder;
 
     if (mesh) {
-      auto maybe_mesh = decoder.DecodeMeshFromBuffer(&decoder_buffer);
+      DRACO_ASSIGN_OR_ASSERT(auto decoded_mesh,
-      ASSERT_TRUE(maybe_mesh.ok());
+                             decoder.DecodeMeshFromBuffer(&decoder_buffer));
-      auto decoded_mesh = std::move(maybe_mesh).value();
       ASSERT_NE(decoded_mesh, nullptr);
       ASSERT_EQ(decoded_mesh->num_points(), encoder.num_encoded_points());
       ASSERT_EQ(decoded_mesh->num_faces(), encoder.num_encoded_faces());
     } else {
-      auto maybe_pc = decoder.DecodePointCloudFromBuffer(&decoder_buffer);
+      DRACO_ASSIGN_OR_ASSERT(
-      ASSERT_TRUE(maybe_pc.ok());
+          auto decoded_pc, decoder.DecodePointCloudFromBuffer(&decoder_buffer));
-      auto decoded_pc = std::move(maybe_pc).value();
       ASSERT_EQ(decoded_pc->num_points(), encoder.num_encoded_points());
     }
   }
@@ -274,7 +273,7 @@ TEST_F(EncodeTest, TestLinesObj) {
   encoder.SetAttributeQuantization(draco::GeometryAttribute::POSITION, 16);
 
   draco::EncoderBuffer buffer;
-  ASSERT_TRUE(encoder.EncodePointCloudToBuffer(*pc, &buffer).ok());
+  DRACO_ASSERT_OK(encoder.EncodePointCloudToBuffer(*pc, &buffer));
 }
 
 TEST_F(EncodeTest, TestQuantizedInfinity) {
@@ -315,7 +314,7 @@ TEST_F(EncodeTest, TestUnquantizedInfinity) {
   encoder.SetEncodingMethod(draco::POINT_CLOUD_SEQUENTIAL_ENCODING);
 
   draco::EncoderBuffer buffer;
-  ASSERT_TRUE(encoder.EncodePointCloudToBuffer(*pc, &buffer).ok());
+  DRACO_ASSERT_OK(encoder.EncodePointCloudToBuffer(*pc, &buffer));
 }
 
 TEST_F(EncodeTest, TestQuantizedAndUnquantizedAttributes) {
@@ -330,7 +329,7 @@ TEST_F(EncodeTest, TestQuantizedAndUnquantizedAttributes) {
   encoder.SetAttributeQuantization(draco::GeometryAttribute::POSITION, 11);
   encoder.SetAttributeQuantization(draco::GeometryAttribute::NORMAL, 0);
   draco::EncoderBuffer buffer;
-  ASSERT_TRUE(encoder.EncodePointCloudToBuffer(*pc, &buffer).ok());
+  DRACO_ASSERT_OK(encoder.EncodePointCloudToBuffer(*pc, &buffer));
 }
 
 TEST_F(EncodeTest, TestKdTreeEncoding) {
@@ -348,7 +347,7 @@ TEST_F(EncodeTest, TestKdTreeEncoding) {
   // Now set quantization for the position attribute which should make
   // the encoder happy.
   encoder.SetAttributeQuantization(draco::GeometryAttribute::POSITION, 16);
-  ASSERT_TRUE(encoder.EncodePointCloudToBuffer(*pc, &buffer).ok());
+  DRACO_ASSERT_OK(encoder.EncodePointCloudToBuffer(*pc, &buffer));
 }
 
 TEST_F(EncodeTest, TestTrackingOfNumberOfEncodedEntries) {
@@ -373,7 +372,7 @@ TEST_F(EncodeTest, TestTrackingOfNumberOfEncodedEntriesNotSet) {
   draco::EncoderBuffer buffer;
   draco::Encoder encoder;
 
-  ASSERT_TRUE(encoder.EncodeMeshToBuffer(*mesh, &buffer).ok());
+  DRACO_ASSERT_OK(encoder.EncodeMeshToBuffer(*mesh, &buffer));
   ASSERT_EQ(encoder.num_encoded_points(), 0);
   ASSERT_EQ(encoder.num_encoded_faces(), 0);
 }
@@ -404,4 +403,170 @@ TEST_F(EncodeTest, TestNoPosQuantizationNormalCoding) {
   ASSERT_NE(decoded_mesh, nullptr);
 }
 
+#ifdef DRACO_TRANSCODER_SUPPORTED
+TEST_F(EncodeTest, TestDracoCompressionOptions) {
+  // This test verifies that we can set the encoder's compression options via
+  // draco::Mesh's compression options.
+  const auto mesh = draco::ReadMeshFromTestFile("test_nm.obj");
+  ASSERT_NE(mesh, nullptr);
+
+  // First set compression level and quantization manually.
+  draco::Encoder encoder_manual;
+  draco::EncoderBuffer buffer_manual;
+  encoder_manual.SetAttributeQuantization(draco::GeometryAttribute::POSITION,
+                                          8);
+  encoder_manual.SetAttributeQuantization(draco::GeometryAttribute::NORMAL, 7);
+  encoder_manual.SetSpeedOptions(4, 4);
+
+  DRACO_ASSERT_OK(encoder_manual.EncodeMeshToBuffer(*mesh, &buffer_manual));
+
+  // Now do the same with options provided via DracoCompressionOptions.
+  draco::DracoCompressionOptions compression_options;
+  compression_options.compression_level = 6;
+  compression_options.quantization_position.SetQuantizationBits(8);
+  compression_options.quantization_bits_normal = 7;
+  mesh->SetCompressionOptions(compression_options);
+  mesh->SetCompressionEnabled(true);
+
+  draco::Encoder encoder_auto;
+  draco::EncoderBuffer buffer_auto;
+  DRACO_ASSERT_OK(encoder_auto.EncodeMeshToBuffer(*mesh, &buffer_auto));
+
+  // Ensure that both encoders produce the same result.
+  ASSERT_EQ(buffer_manual.size(), buffer_auto.size());
+
+  // Now change some of the mesh's compression settings and ensure the
+  // compression changes as well.
+  compression_options.compression_level = 7;
+  mesh->SetCompressionOptions(compression_options);
+  buffer_auto.Clear();
+  DRACO_ASSERT_OK(encoder_auto.EncodeMeshToBuffer(*mesh, &buffer_auto));
+  ASSERT_NE(buffer_manual.size(), buffer_auto.size());
+
+  // Check that |mesh| compression options do not override the encoder options.
+  mesh->GetCompressionOptions().compression_level = 10;
+  mesh->GetCompressionOptions().quantization_position.SetQuantizationBits(10);
+  mesh->GetCompressionOptions().quantization_bits_normal = 10;
+  draco::EncoderBuffer buffer;
+  DRACO_ASSERT_OK(encoder_manual.EncodeMeshToBuffer(*mesh, &buffer));
+  ASSERT_EQ(buffer.size(), buffer_manual.size());
+}
+
+TEST_F(EncodeTest, TestDracoCompressionOptionsManualOverride) {
+  // This test verifies that we can use encoder's option to override compression
+  // options provided in draco::Mesh's compression options.
+  const auto mesh = draco::ReadMeshFromTestFile("test_nm.obj");
+  ASSERT_NE(mesh, nullptr);
+
+  // Set some compression options.
+  draco::DracoCompressionOptions compression_options;
+  compression_options.compression_level = 6;
+  compression_options.quantization_position.SetQuantizationBits(8);
+  compression_options.quantization_bits_normal = 7;
+  mesh->SetCompressionOptions(compression_options);
+  mesh->SetCompressionEnabled(true);
+
+  draco::Encoder encoder;
+  draco::EncoderBuffer buffer_no_override;
+  DRACO_ASSERT_OK(encoder.EncodeMeshToBuffer(*mesh, &buffer_no_override));
+
+  // Now override some options and ensure the compression is different.
+  encoder.SetAttributeQuantization(draco::GeometryAttribute::POSITION, 5);
+  draco::EncoderBuffer buffer_with_override;
+  DRACO_ASSERT_OK(encoder.EncodeMeshToBuffer(*mesh, &buffer_with_override));
+  ASSERT_LT(buffer_with_override.size(), buffer_no_override.size());
+}
+
+TEST_F(EncodeTest, TestDracoCompressionOptionsGridQuantization) {
+  // Test verifies that we can set position quantization via grid spacing.
+
+  // 1x1x1 cube.
+  const auto mesh = draco::ReadMeshFromTestFile("cube_att.obj");
+  ASSERT_NE(mesh, nullptr);
+  mesh->SetCompressionEnabled(true);
+
+  // Set grid quantization for positions.
+  draco::DracoCompressionOptions compression_options;
+  // This should result in 10x10x10 quantization.
+  compression_options.quantization_position.SetGrid(0.1);
+  mesh->SetCompressionOptions(compression_options);
+
+  draco::ExpertEncoder encoder(*mesh);
+  draco::EncoderBuffer buffer;
+  DRACO_ASSERT_OK(encoder.EncodeToBuffer(&buffer));
+
+  // The grid options should be reflected in the |encoder|. Check that the
+  // computed values are correct.
+  const int pos_att_id =
+      mesh->GetNamedAttributeId(draco::GeometryAttribute::POSITION);
+  draco::Vector3f origin;
+  encoder.options().GetAttributeVector(pos_att_id, "quantization_origin", 3,
+                                       &origin[0]);
+  ASSERT_EQ(origin, draco::Vector3f(0.f, 0.f, 0.f));
+
+  // We need 4 quantization bits (for 10 values).
+  ASSERT_EQ(
+      encoder.options().GetAttributeInt(pos_att_id, "quantization_bits", -1),
+      4);
+
+  // The quantization range should be ((1 << quantization_bits) - 1) * spacing.
+  ASSERT_NEAR(encoder.options().GetAttributeFloat(pos_att_id,
+                                                  "quantization_range", 0.f),
+              15.f * 0.1f, 1e-6f);
+}
+
+TEST_F(EncodeTest, TestDracoCompressionOptionsGridQuantizationWithOffset) {
+  // Test verifies that we can set position quantization via grid spacing when
+  // the geometry is not perfectly aligned with the quantization grid.
+
+  // 1x1x1 cube.
+  const auto mesh = draco::ReadMeshFromTestFile("cube_att.obj");
+  ASSERT_NE(mesh, nullptr);
+
+  // Move all positions a bit.
+  auto *pos_att = mesh->attribute(
+      mesh->GetNamedAttributeId(draco::GeometryAttribute::POSITION));
+  for (draco::AttributeValueIndex avi(0); avi < pos_att->size(); ++avi) {
+    draco::Vector3f pos;
+    pos_att->GetValue(avi, &pos[0]);
+    pos = pos + draco::Vector3f(-0.55f, 0.65f, 10.75f);
+    pos_att->SetAttributeValue(avi, &pos[0]);
+  }
+
+  mesh->SetCompressionEnabled(true);
+
+  // Set grid quantization for positions.
+  draco::DracoCompressionOptions compression_options;
+  // This should result in 16x16x16 quantization if the grid was perfectly
+  // aligned but since it is not we should expect 17 or 18 values per component.
+  compression_options.quantization_position.SetGrid(0.0625f);
+  mesh->SetCompressionOptions(compression_options);
+
+  draco::ExpertEncoder encoder(*mesh);
+  draco::EncoderBuffer buffer;
+  DRACO_ASSERT_OK(encoder.EncodeToBuffer(&buffer));
+
+  // The grid options should be reflected in the |encoder|. Check that the
+  // computed values are correct.
+  const int pos_att_id =
+      mesh->GetNamedAttributeId(draco::GeometryAttribute::POSITION);
+  draco::Vector3f origin;
+  encoder.options().GetAttributeVector(pos_att_id, "quantization_origin", 3,
+                                       &origin[0]);
+  // The origin is the first lower value on the quantization grid for each
+  // component of the mesh.
+  ASSERT_EQ(origin, draco::Vector3f(-0.5625f, 0.625f, 10.75f));
+
+  // We need 5 quantization bits (for 17-18 values).
+  ASSERT_EQ(
+      encoder.options().GetAttributeInt(pos_att_id, "quantization_bits", -1),
+      5);
+
+  // The quantization range should be ((1 << quantization_bits) - 1) * spacing.
+  ASSERT_NEAR(encoder.options().GetAttributeFloat(pos_att_id,
+                                                  "quantization_range", 0.f),
+              31.f * 0.0625f, 1e-6f);
+}
+#endif  // DRACO_TRANSCODER_SUPPORTED
+
 }  // namespace

contrib/draco/src/draco/compression/entropy/ans.h

@@ -391,7 +391,6 @@ class RAnsEncoder {
       ans_.buf[ans_.buf_offset++] = ans_.state % DRACO_ANS_IO_BASE;
       ans_.state /= DRACO_ANS_IO_BASE;
     }
-    // TODO(ostava): The division and multiplication should be optimized.
     ans_.state =
         (ans_.state / p) * rans_precision + ans_.state % p + sym->cum_prob;
   }

contrib/draco/src/draco/compression/entropy/rans_symbol_decoder.h

@@ -75,6 +75,13 @@ bool RAnsSymbolDecoder<unique_symbols_bit_length_t>::Create(
       return false;
     }
   }
+  // Check that decoded number of symbols is not unreasonably high. Remaining
+  // buffer size must be at least |num_symbols| / 64 bytes to contain the
+  // probability table. The |prob_data| below is one byte but it can be
+  // theoretically stored for each 64th symbol.
+  if (num_symbols_ / 64 > buffer->remaining_size()) {
+    return false;
+  }
   probability_table_.resize(num_symbols_);
   if (num_symbols_ == 0) {
     return true;

contrib/draco/src/draco/compression/entropy/rans_symbol_encoder.h

@@ -125,7 +125,7 @@ bool RAnsSymbolEncoder<unique_symbols_bit_length_t>::Create(
     for (int i = 0; i < num_symbols; ++i) {
       sorted_probabilities[i] = i;
     }
-    std::sort(sorted_probabilities.begin(), sorted_probabilities.end(),
+    std::stable_sort(sorted_probabilities.begin(), sorted_probabilities.end(),
                      ProbabilityLess(&probability_table_));
     if (total_rans_prob < rans_precision_) {
       // This happens rather infrequently, just add the extra needed precision

contrib/draco/src/draco/compression/entropy/symbol_decoding.cc

@@ -72,7 +72,7 @@ bool DecodeTaggedSymbols(uint32_t num_values, int num_components,
   int value_id = 0;
   for (uint32_t i = 0; i < num_values; i += num_components) {
     // Decode the tag.
-    const int bit_length = tag_decoder.DecodeSymbol();
+    const uint32_t bit_length = tag_decoder.DecodeSymbol();
     // Decode the actual value.
     for (int j = 0; j < num_components; ++j) {
       uint32_t val;

contrib/draco/src/draco/compression/expert_encode.cc

@@ -14,6 +14,12 @@
 //
 #include "draco/compression/expert_encode.h"
 
+#include <iostream>
+#include <memory>
+#include <ostream>
+#include <string>
+#include <utility>
+
 #include "draco/compression/mesh/mesh_edgebreaker_encoder.h"
 #include "draco/compression/mesh/mesh_sequential_encoder.h"
 #ifdef DRACO_POINT_CLOUD_COMPRESSION_SUPPORTED
@@ -21,6 +27,9 @@
 #include "draco/compression/point_cloud/point_cloud_sequential_encoder.h"
 #endif
 
+#ifdef DRACO_TRANSCODER_SUPPORTED
+#include "draco/core/bit_utils.h"
+#endif
 namespace draco {
 
 ExpertEncoder::ExpertEncoder(const PointCloud &point_cloud)
@@ -101,6 +110,11 @@ Status ExpertEncoder::EncodePointCloudToBuffer(const PointCloud &pc,
 
 Status ExpertEncoder::EncodeMeshToBuffer(const Mesh &m,
                                          EncoderBuffer *out_buffer) {
+#ifdef DRACO_TRANSCODER_SUPPORTED
+  // Apply DracoCompressionOptions associated with the mesh.
+  DRACO_RETURN_IF_ERROR(ApplyCompressionOptions(m));
+#endif  // DRACO_TRANSCODER_SUPPORTED
+
   std::unique_ptr<MeshEncoder> encoder;
   // Select the encoding method only based on the provided options.
   int encoding_method = options().GetGlobalInt("encoding_method", -1);
@@ -118,6 +132,7 @@ Status ExpertEncoder::EncodeMeshToBuffer(const Mesh &m,
     encoder = std::unique_ptr<MeshEncoder>(new MeshSequentialEncoder());
   }
   encoder->SetMesh(m);
+
   DRACO_RETURN_IF_ERROR(encoder->Encode(options(), out_buffer));
 
   set_num_encoded_points(encoder->num_encoded_points());
@@ -179,4 +194,107 @@ Status ExpertEncoder::SetAttributePredictionScheme(
   return status;
 }
 
+#ifdef DRACO_TRANSCODER_SUPPORTED
+Status ExpertEncoder::ApplyCompressionOptions(const Mesh &mesh) {
+  if (!mesh.IsCompressionEnabled()) {
+    return OkStatus();
+  }
+  const auto &compression_options = mesh.GetCompressionOptions();
+
+  // Set any encoder options that haven't been explicitly set by users (don't
+  // override existing options).
+  if (!options().IsSpeedSet()) {
+    options().SetSpeed(10 - compression_options.compression_level,
+                       10 - compression_options.compression_level);
+  }
+
+  for (int ai = 0; ai < mesh.num_attributes(); ++ai) {
+    if (options().IsAttributeOptionSet(ai, "quantization_bits")) {
+      continue;  // Don't override options that have been set.
+    }
+    int quantization_bits = 0;
+    const auto type = mesh.attribute(ai)->attribute_type();
+    switch (type) {
+      case GeometryAttribute::POSITION:
+        if (compression_options.quantization_position
+                .AreQuantizationBitsDefined()) {
+          quantization_bits =
+              compression_options.quantization_position.quantization_bits();
+        } else {
+          DRACO_RETURN_IF_ERROR(ApplyGridQuantization(mesh, ai));
+        }
+        break;
+      case GeometryAttribute::TEX_COORD:
+        quantization_bits = compression_options.quantization_bits_tex_coord;
+        break;
+      case GeometryAttribute::NORMAL:
+        quantization_bits = compression_options.quantization_bits_normal;
+        break;
+      case GeometryAttribute::COLOR:
+        quantization_bits = compression_options.quantization_bits_color;
+        break;
+      case GeometryAttribute::TANGENT:
+        quantization_bits = compression_options.quantization_bits_tangent;
+        break;
+      case GeometryAttribute::WEIGHTS:
+        quantization_bits = compression_options.quantization_bits_weight;
+        break;
+      case GeometryAttribute::GENERIC:
+        quantization_bits = compression_options.quantization_bits_generic;
+        break;
+      default:
+        break;
+    }
+    if (quantization_bits > 0) {
+      options().SetAttributeInt(ai, "quantization_bits", quantization_bits);
+    }
+  }
+  return OkStatus();
+}
+
+Status ExpertEncoder::ApplyGridQuantization(const Mesh &mesh,
+                                            int attribute_index) {
+  const auto compression_options = mesh.GetCompressionOptions();
+  if (mesh.attribute(attribute_index)->num_components() != 3) {
+    return ErrorStatus(
+        "Invalid number of components: Grid quantization is currently "
+        "supported only for 3D positions.");
+  }
+  const float spacing = compression_options.quantization_position.spacing();
+  // Compute quantization properties based on the grid spacing.
+  const auto &bbox = mesh.ComputeBoundingBox();
+  // Snap min and max points of the |bbox| to the quantization grid vertices.
+  Vector3f min_pos;
+  int num_values = 0;  // Number of values that we need to encode.
+  for (int c = 0; c < 3; ++c) {
+    // Min / max position on grid vertices in grid coordinates.
+    const float min_grid_pos = floor(bbox.GetMinPoint()[c] / spacing);
+    const float max_grid_pos = ceil(bbox.GetMaxPoint()[c] / spacing);
+
+    // Min pos on grid vertex in mesh coordinates.
+    min_pos[c] = min_grid_pos * spacing;
+
+    const float component_num_values =
+        static_cast<int>(max_grid_pos) - static_cast<int>(min_grid_pos) + 1;
+    if (component_num_values > num_values) {
+      num_values = component_num_values;
+    }
+  }
+  // Now compute the number of bits needed to encode |num_values|.
+  int bits = MostSignificantBit(num_values);
+  if ((1 << bits) < num_values) {
+    // If the |num_values| is larger than number of values representable by
+    // |bits|, we need to use one more bit. This will be almost always true
+    // unless |num_values| was equal to 1 << |bits|.
+    bits++;
+  }
+  // Compute the range in mesh coordinates that matches the quantization bits.
+  // Note there are n-1 intervals between the |n| quantization values.
+  const float range = ((1 << bits) - 1) * spacing;
+  SetAttributeExplicitQuantization(attribute_index, bits, 3, min_pos.data(),
+                                   range);
+  return OkStatus();
+}
+#endif  // DRACO_TRANSCODER_SUPPORTED
+
 }  // namespace draco

contrib/draco/src/draco/compression/expert_encode.h

@@ -138,6 +138,12 @@ class ExpertEncoder : public EncoderBase<EncoderOptions> {
 
   Status EncodeMeshToBuffer(const Mesh &m, EncoderBuffer *out_buffer);
 
+#ifdef DRACO_TRANSCODER_SUPPORTED
+  // Applies compression options stored in |mesh|.
+  Status ApplyCompressionOptions(const Mesh &mesh);
+  Status ApplyGridQuantization(const Mesh &mesh, int attribute_index);
+#endif  // DRACO_TRANSCODER_SUPPORTED
+
   const PointCloud *point_cloud_;
   const Mesh *mesh_;
 };

contrib/draco/src/draco/compression/mesh/mesh_edgebreaker_decoder_impl.cc

@@ -454,7 +454,7 @@ bool MeshEdgebreakerDecoderImpl<TraversalDecoder>::DecodeConnectivity() {
 #endif
 
   // Decode connectivity of non-position attributes.
-  if (attribute_data_.size() > 0) {
+  if (!attribute_data_.empty()) {
 #ifdef DRACO_BACKWARDS_COMPATIBILITY_SUPPORTED
     if (decoder_->bitstream_version() < DRACO_BITSTREAM_VERSION(2, 1)) {
       for (CornerIndex ci(0); ci < corner_table_->num_corners(); ci += 3) {
@@ -484,7 +484,10 @@ bool MeshEdgebreakerDecoderImpl<TraversalDecoder>::DecodeConnectivity() {
       attribute_data_[i].connectivity_data.AddSeamEdge(CornerIndex(c));
     }
     // Recompute vertices from the newly added seam edges.
-    attribute_data_[i].connectivity_data.RecomputeVertices(nullptr, nullptr);
+    if (!attribute_data_[i].connectivity_data.RecomputeVertices(nullptr,
+                                                                nullptr)) {
+      return false;
+    }
   }
 
   pos_encoding_data_.Init(corner_table_->num_vertices());
@@ -574,6 +577,17 @@ int MeshEdgebreakerDecoderImpl<TraversalDecoder>::DecodeConnectivity(
       const CornerIndex corner_b =
           corner_table_->Next(corner_table_->LeftMostCorner(vertex_x));
 
+      if (corner_a == corner_b) {
+        // All matched corners must be different.
+        return -1;
+      }
+      if (corner_table_->Opposite(corner_a) != kInvalidCornerIndex ||
+          corner_table_->Opposite(corner_b) != kInvalidCornerIndex) {
+        // One of the corners is already opposite to an existing face, which
+        // should not happen unless the input was tampered with.
+        return -1;
+      }
+
       // New tip corner.
       const CornerIndex corner(3 * face.value());
       // Update opposite corner mappings.
@@ -616,6 +630,11 @@ int MeshEdgebreakerDecoderImpl<TraversalDecoder>::DecodeConnectivity(
         return -1;
       }
       const CornerIndex corner_a = active_corner_stack.back();
+      if (corner_table_->Opposite(corner_a) != kInvalidCornerIndex) {
+        // Active corner is already opposite to an existing face, which should
+        // not happen unless the input was tampered with.
+        return -1;
+      }
 
       // First corner on the new face is either corner "l" or "r".
       const CornerIndex corner(3 * face.value());
@@ -681,10 +700,14 @@ int MeshEdgebreakerDecoderImpl<TraversalDecoder>::DecodeConnectivity(
       }
       const CornerIndex corner_a = active_corner_stack.back();
 
+      if (corner_a == corner_b) {
+        // All matched corners must be different.
+        return -1;
+      }
       if (corner_table_->Opposite(corner_a) != kInvalidCornerIndex ||
           corner_table_->Opposite(corner_b) != kInvalidCornerIndex) {
         // One of the corners is already opposite to an existing face, which
-        // should not happen unless the input was tempered with.
+        // should not happen unless the input was tampered with.
         return -1;
       }
 
@@ -713,9 +736,15 @@ int MeshEdgebreakerDecoderImpl<TraversalDecoder>::DecodeConnectivity(
 
       // Also update the vertex id at corner "n" and all corners that are
       // connected to it in the CCW direction.
+      const CornerIndex first_corner = corner_n;
       while (corner_n != kInvalidCornerIndex) {
         corner_table_->MapCornerToVertex(corner_n, vertex_p);
         corner_n = corner_table_->SwingLeft(corner_n);
+        if (corner_n == first_corner) {
+          // We reached the start again which should not happen for split
+          // symbols.
+          return -1;
+        }
       }
       // Make sure the old vertex n is now mapped to an invalid corner (make it
       // isolated).
@@ -800,7 +829,7 @@ int MeshEdgebreakerDecoderImpl<TraversalDecoder>::DecodeConnectivity(
     return -1;  // Unexpected number of decoded vertices.
   }
   // Decode start faces and connect them to the faces from the active stack.
-  while (active_corner_stack.size() > 0) {
+  while (!active_corner_stack.empty()) {
     const CornerIndex corner = active_corner_stack.back();
     active_corner_stack.pop_back();
     const bool interior_face =
@@ -842,6 +871,18 @@ int MeshEdgebreakerDecoderImpl<TraversalDecoder>::DecodeConnectivity(
       const CornerIndex corner_c =
           corner_table_->Next(corner_table_->LeftMostCorner(vert_x));
 
+      if (corner == corner_b || corner == corner_c || corner_b == corner_c) {
+        // All matched corners must be different.
+        return -1;
+      }
+      if (corner_table_->Opposite(corner) != kInvalidCornerIndex ||
+          corner_table_->Opposite(corner_b) != kInvalidCornerIndex ||
+          corner_table_->Opposite(corner_c) != kInvalidCornerIndex) {
+        // One of the corners is already opposite to an existing face, which
+        // should not happen unless the input was tampered with.
+        return -1;
+      }
+
       const VertexIndex vert_p =
           corner_table_->Vertex(corner_table_->Next(corner_c));
 
@@ -894,6 +935,11 @@ int MeshEdgebreakerDecoderImpl<TraversalDecoder>::DecodeConnectivity(
     VertexCornersIterator<CornerTable> vcit(corner_table_.get(), src_vert);
     for (; !vcit.End(); ++vcit) {
       const CornerIndex cid = vcit.Corner();
+      if (corner_table_->Vertex(cid) != src_vert) {
+        // Vertex mapped to |cid| was not |src_vert|. This indicates corrupted
+        // data and we should terminate the decoding.
+        return -1;
+      }
       corner_table_->MapCornerToVertex(cid, invalid_vert);
     }
     corner_table_->SetLeftMostCorner(invalid_vert,

contrib/draco/src/draco/compression/mesh/mesh_edgebreaker_encoder.cc

@@ -31,7 +31,6 @@ bool MeshEdgebreakerEncoder::InitializeEncoder() {
   impl_ = nullptr;
   // For tiny meshes it's usually better to use the basic edgebreaker as the
   // overhead of the predictive one may turn out to be too big.
-  // TODO(b/111065939): Check if this can be improved.
   const bool is_tiny_mesh = mesh()->num_faces() < 1000;
 
   int selected_edgebreaker_method =

contrib/draco/src/draco/compression/mesh/mesh_edgebreaker_encoder_impl.cc

@@ -408,7 +408,7 @@ Status MeshEdgebreakerEncoderImpl<TraversalEncoder>::EncodeConnectivity() {
                                          init_face_connectivity_corners.begin(),
                                          init_face_connectivity_corners.end());
   // Encode connectivity for all non-position attributes.
-  if (attribute_data_.size() > 0) {
+  if (!attribute_data_.empty()) {
     // Use the same order of corner that will be used by the decoder.
     visited_faces_.assign(mesh_->num_faces(), false);
     for (CornerIndex ci : processed_connectivity_corners_) {

contrib/draco/src/draco/compression/mesh/mesh_edgebreaker_encoder_impl.h

@@ -177,7 +177,6 @@ class MeshEdgebreakerEncoderImpl : public MeshEdgebreakerEncoderImplInterface {
   uint32_t num_split_symbols_;
 
   // Struct holding data used for encoding each non-position attribute.
-  // TODO(ostava): This should be probably renamed to something better.
   struct AttributeData {
     AttributeData() : attribute_index(-1), is_connectivity_used(true) {}
     int attribute_index;

contrib/draco/src/draco/compression/mesh/mesh_edgebreaker_encoding_test.cc

@@ -44,7 +44,7 @@ class MeshEdgebreakerEncodingTest : public ::testing::Test {
     EncoderOptions encoder_options = EncoderOptions::CreateDefaultOptions();
     encoder_options.SetSpeed(10 - compression_level, 10 - compression_level);
     encoder.SetMesh(*mesh);
-    ASSERT_TRUE(encoder.Encode(encoder_options, &buffer).ok());
+    DRACO_ASSERT_OK(encoder.Encode(encoder_options, &buffer));
 
     DecoderBuffer dec_buffer;
     dec_buffer.Init(buffer.data(), buffer.size());
@@ -52,15 +52,14 @@ class MeshEdgebreakerEncodingTest : public ::testing::Test {
 
     std::unique_ptr<Mesh> decoded_mesh(new Mesh());
     DecoderOptions dec_options;
-    ASSERT_TRUE(
+    DRACO_ASSERT_OK(
-        decoder.Decode(dec_options, &dec_buffer, decoded_mesh.get()).ok());
+        decoder.Decode(dec_options, &dec_buffer, decoded_mesh.get()));
 
     // Cleanup the input mesh to make sure that input and output can be
     // compared (edgebreaker method discards degenerated triangles and isolated
     // vertices).
     const MeshCleanupOptions options;
-    MeshCleanup cleanup;
+    DRACO_ASSERT_OK(MeshCleanup::Cleanup(mesh, options));
-    ASSERT_TRUE(cleanup(mesh, options)) << "Failed to clean the input mesh.";
 
     MeshAreEquivalent eq;
     ASSERT_TRUE(eq(*mesh, *decoded_mesh.get()))
@@ -102,8 +101,8 @@ TEST_F(MeshEdgebreakerEncodingTest, TestEncoderReuse) {
   EncoderOptions encoder_options = EncoderOptions::CreateDefaultOptions();
   encoder.SetMesh(*mesh);
   EncoderBuffer buffer_0, buffer_1;
-  ASSERT_TRUE(encoder.Encode(encoder_options, &buffer_0).ok());
+  DRACO_ASSERT_OK(encoder.Encode(encoder_options, &buffer_0));
-  ASSERT_TRUE(encoder.Encode(encoder_options, &buffer_1).ok());
+  DRACO_ASSERT_OK(encoder.Encode(encoder_options, &buffer_1));
 
   // Make sure both buffer are identical.
   ASSERT_EQ(buffer_0.size(), buffer_1.size());
@@ -123,7 +122,7 @@ TEST_F(MeshEdgebreakerEncodingTest, TestDecoderReuse) {
   EncoderOptions encoder_options = EncoderOptions::CreateDefaultOptions();
   encoder.SetMesh(*mesh);
   EncoderBuffer buffer;
-  ASSERT_TRUE(encoder.Encode(encoder_options, &buffer).ok());
+  DRACO_ASSERT_OK(encoder.Encode(encoder_options, &buffer));
 
   DecoderBuffer dec_buffer;
   dec_buffer.Init(buffer.data(), buffer.size());
@@ -133,13 +132,13 @@ TEST_F(MeshEdgebreakerEncodingTest, TestDecoderReuse) {
   // Decode the mesh two times.
   std::unique_ptr<Mesh> decoded_mesh_0(new Mesh());
   DecoderOptions dec_options;
-  ASSERT_TRUE(
+  DRACO_ASSERT_OK(
-      decoder.Decode(dec_options, &dec_buffer, decoded_mesh_0.get()).ok());
+      decoder.Decode(dec_options, &dec_buffer, decoded_mesh_0.get()));
 
   dec_buffer.Init(buffer.data(), buffer.size());
   std::unique_ptr<Mesh> decoded_mesh_1(new Mesh());
-  ASSERT_TRUE(
+  DRACO_ASSERT_OK(
-      decoder.Decode(dec_options, &dec_buffer, decoded_mesh_1.get()).ok());
+      decoder.Decode(dec_options, &dec_buffer, decoded_mesh_1.get()));
 
   // Make sure both of the meshes are identical.
   MeshAreEquivalent eq;
@@ -169,7 +168,7 @@ TEST_F(MeshEdgebreakerEncodingTest, TestSingleConnectivityEncoding) {
     encoder.SetAttributeQuantization(GeometryAttribute::TEX_COORD, 8);
     encoder.SetAttributeQuantization(GeometryAttribute::NORMAL, 8);
     encoder.SetEncodingMethod(MESH_EDGEBREAKER_ENCODING);
-    ASSERT_TRUE(encoder.EncodeMeshToBuffer(*mesh, &buffer).ok());
+    DRACO_ASSERT_OK(encoder.EncodeMeshToBuffer(*mesh, &buffer));
 
     DecoderBuffer dec_buffer;
     dec_buffer.Init(buffer.data(), buffer.size());
@@ -216,7 +215,7 @@ TEST_F(MeshEdgebreakerEncodingTest, TestWrongAttributeOrder) {
   encoder.SetAttributeQuantization(GeometryAttribute::POSITION, 8);
   encoder.SetAttributeQuantization(GeometryAttribute::NORMAL, 8);
   encoder.SetEncodingMethod(MESH_EDGEBREAKER_ENCODING);
-  ASSERT_TRUE(encoder.EncodeMeshToBuffer(*mesh, &buffer).ok());
+  DRACO_ASSERT_OK(encoder.EncodeMeshToBuffer(*mesh, &buffer));
 
   DecoderBuffer dec_buffer;
   dec_buffer.Init(buffer.data(), buffer.size());

contrib/draco/src/draco/compression/mesh/mesh_edgebreaker_shared.h

@@ -50,8 +50,6 @@ namespace draco {
 //    \ /  S  \ /          /  E  \
 //     *-------*          *-------*
 //
-// TODO(ostava): Get rid of the topology bit pattern. It's important only for
-// encoding but the algorithms should use EdgebreakerSymbol instead.
 enum EdgebreakerTopologyBitPattern {
   TOPOLOGY_C = 0x0,  // 0
   TOPOLOGY_S = 0x1,  // 1 0 0

contrib/draco/src/draco/compression/mesh/mesh_edgebreaker_traversal_valence_decoder.h

@@ -129,7 +129,11 @@ class MeshEdgebreakerTraversalValenceDecoder
       if (context_counter < 0) {
         return TOPOLOGY_INVALID;
       }
-      const int symbol_id = context_symbols_[active_context_][context_counter];
+      const uint32_t symbol_id =
+          context_symbols_[active_context_][context_counter];
+      if (symbol_id > 4) {
+        return TOPOLOGY_INVALID;
+      }
       last_symbol_ = edge_breaker_symbol_to_topology_id[symbol_id];
     } else {
 #ifdef DRACO_BACKWARDS_COMPATIBILITY_SUPPORTED