Android JNI asset extraction support (API 9+)

Signed-off-by: Filip Wasil <filip.wasil@tieto.com>

CREDITS

@@ -148,3 +148,6 @@ Bugfixes for uv-tanget calculation.
 
 - Jonne Nauha
 Ogre Binary format support
+
+- Filip Wasil, Tieto Poland Sp. z o.o.
+Android JNI asset extraction support

INSTALL

@@ -42,4 +42,12 @@ toolchain (for standard GNU makefiles: cmake -G 'Unix Makefiles').
 Afterwards, use the generated build files to perform the actual
 build. 
 
+------------------------------
+Building for Android
+------------------------------
 
+When building for android this flag must be introduced to CMAKE:
+
+-DCMAKE_TOOLCHAIN_FILE=../android.toolchain.cmake
+
+where "android.toolchain.cmake" is a toolchain script for android (Can be easily found in web)

code/AndroidJNIIOSystem.cpp

@@ -0,0 +1,168 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2012, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms, 
+with or without modification, are permitted provided that the following 
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file Android extension of DefaultIOSystem using the standard C file functions */
+
+
+#include "AssimpPCH.h"
+#if __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+
+#include <stdlib.h>
+#include "AndroidJNIIOSystem.h"
+#include "DefaultIOStream.h"
+
+using namespace Assimp;
+
+// ------------------------------------------------------------------------------------------------
+// Constructor. 
+AndroidJNIIOSystem::AndroidJNIIOSystem(ANativeActivity* activity)
+{
+	AndroidActivityInit(activity);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor. 
+AndroidJNIIOSystem::~AndroidJNIIOSystem()
+{
+	// nothing to do here
+}
+
+// ------------------------------------------------------------------------------------------------
+// Tests for the existence of a file at the given path.
+bool AndroidJNIIOSystem::Exists( const char* pFile) const
+{
+	AAsset* asset = AAssetManager_open(mApkAssetManager, pFile,
+			AASSET_MODE_UNKNOWN);
+	FILE* file = ::fopen( (mApkWorkspacePath + getOsSeparator() + std::string(pFile)).c_str(), "rb");
+
+	if (!asset && !file)
+		{
+		__android_log_print(ANDROID_LOG_ERROR, "Assimp", "Asset manager can not find: %s", pFile);
+		return false;
+		}
+
+	__android_log_print(ANDROID_LOG_ERROR, "Assimp", "Asset exists");
+	if (file)
+		::fclose( file);
+	return true;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Inits Android extractor
+void AndroidJNIIOSystem::AndroidActivityInit(ANativeActivity* activity)
+{
+	mApkWorkspacePath = activity->internalDataPath;
+	mApkAssetManager = activity->assetManager;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Extracts android asset
+bool AndroidJNIIOSystem::AndroidExtractAsset(std::string name)
+{
+	std::string newPath = mApkWorkspacePath + getOsSeparator() + name;
+
+	DefaultIOSystem io;
+
+	// Do not extract if extracted already
+	if ( io.Exists(newPath.c_str()) ) {
+		__android_log_print(ANDROID_LOG_DEFAULT, "Assimp", "Asset already extracted");
+		return true;
+	}
+	// Open file
+	AAsset* asset = AAssetManager_open(mApkAssetManager, name.c_str(),
+			AASSET_MODE_UNKNOWN);
+	std::string assetContent;
+
+	if (asset != NULL) {
+		// Find size
+		off_t assetSize = AAsset_getLength(asset);
+
+		// Prepare input buffer
+		assetContent.resize(assetSize);
+
+		// Store input buffer
+		AAsset_read(asset, &assetContent[0], assetSize);
+
+		// Close
+		AAsset_close(asset);
+
+		// Prepare output buffer
+		std::ofstream assetExtracted(newPath.c_str(),
+				std::ios::out | std::ios::binary);
+		if (!assetExtracted) {
+			__android_log_print(ANDROID_LOG_ERROR, "assimp",
+					"Can not open output file");
+		}
+
+		// Write output buffer into a file
+		assetExtracted.write(assetContent.c_str(), strlen(assetContent.c_str()));
+		assetExtracted.close();
+
+		__android_log_print(ANDROID_LOG_DEFAULT, "Assimp", "Asset extracted");
+	} else {
+		__android_log_print(ANDROID_LOG_ERROR, "assimp", "Asset not found: %s", name.c_str());
+		return false;
+	}
+	return true;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Open a new file with a given path.
+IOStream* AndroidJNIIOSystem::Open( const char* strFile, const char* strMode)
+{
+	ai_assert(NULL != strFile);
+	ai_assert(NULL != strMode);
+
+	std::string fullPath(mApkWorkspacePath + getOsSeparator() + std::string(strFile));
+	if	(Exists(strFile))
+		AndroidExtractAsset(std::string(strFile));
+
+	FILE* file = ::fopen( fullPath.c_str(), strMode);
+
+	if( NULL == file)
+		return NULL;
+
+	__android_log_print(ANDROID_LOG_ERROR, "assimp", "AndroidIOSystem: file %s opened", fullPath.c_str());
+	return new DefaultIOStream(file, fullPath);
+}
+
+#undef PATHLIMIT
+#endif // __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)

code/AndroidJNIIOSystem.h

@@ -0,0 +1,91 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2012, assimp team
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms, 
+with or without modification, are permitted provided that the 
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file Android implementation of IOSystem using the standard C file functions.
+ * Aimed to ease the acces to android assets */
+
+#if __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+#ifndef AI_ANDROIDJNIIOSYSTEM_H_INC
+#define AI_ANDROIDJNIIOSYSTEM_H_INC
+
+#include "DefaultIOSystem.h"
+#include <android/asset_manager.h>
+#include <android/asset_manager_jni.h>
+
+namespace Assimp	{
+
+// ---------------------------------------------------------------------------
+/** Android extension to DefaultIOSystem using the standard C file functions */
+class AndroidJNIIOSystem : public DefaultIOSystem
+{
+public:
+
+	/** Initialize android activity data */
+	std::string mApkWorkspacePath;
+	AAssetManager* mApkAssetManager;
+
+	/** Constructor. */
+	AndroidJNIIOSystem(ANativeActivity* activity);
+
+	/** Destructor. */
+	~AndroidJNIIOSystem();
+
+	// -------------------------------------------------------------------
+	/** Tests for the existence of a file at the given path. */
+	bool Exists( const char* pFile) const;
+
+	// -------------------------------------------------------------------
+	/** Opens a file at the given path, with given mode */
+	IOStream* Open( const char* strFile, const char* strMode);
+
+	// ------------------------------------------------------------------------------------------------
+	// Inits Android extractor
+	void AndroidActivityInit(ANativeActivity* activity);
+
+	// ------------------------------------------------------------------------------------------------
+	// Extracts android asset
+	bool AndroidExtractAsset(std::string name);
+
+};
+
+} //!ns Assimp
+
+#endif //AI_ANDROIDJNIIOSYSTEM_H_INC
+#endif //__ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)

code/CMakeLists.txt

@@ -104,6 +104,8 @@ SET( Common_SRCS
 	DefaultIOStream.h
 	DefaultIOSystem.cpp
 	DefaultIOSystem.h
+	AndroidJNIIOSystem.cpp
+	AndroidJNIIOSystem.h
 	CInterfaceIOWrapper.h
 	Hash.h
 	Importer.cpp
@@ -702,7 +704,12 @@ ADD_LIBRARY( assimp ${assimp_src} )
 
 SET_PROPERTY(TARGET assimp PROPERTY DEBUG_POSTFIX ${ASSIMP_DEBUG_POSTFIX})
 
+if(ANDROID)
+	TARGET_LINK_LIBRARIES(assimp ${ZLIB_LIBRARIES} android log)
+else(ANDROID)
 	TARGET_LINK_LIBRARIES(assimp ${ZLIB_LIBRARIES})
+endif(ANDROID)
+
 SET_TARGET_PROPERTIES( assimp PROPERTIES
 	VERSION ${ASSIMP_VERSION}
 	SOVERSION ${ASSIMP_SOVERSION} # use full version 
@@ -717,7 +724,11 @@ endif()
 # assimp can #include "unzip.h"
 if (UNZIP_FOUND)
 	INCLUDE_DIRECTORIES(${UNZIP_INCLUDE_DIRS})
+	if(ANDROID)
+		TARGET_LINK_LIBRARIES(assimp ${UNZIP_LIBRARIES} android log)
+	else(ANDROID)
 		TARGET_LINK_LIBRARIES(assimp ${UNZIP_LIBRARIES})
+	endif(ANDROID)
 else (UNZIP_FOUND)
 	INCLUDE_DIRECTORIES("../contrib/unzip")
 endif (UNZIP_FOUND)

code/DefaultIOStream.h

@@ -56,6 +56,9 @@ namespace Assimp	{
 class DefaultIOStream : public IOStream
 {
 	friend class DefaultIOSystem;
+#if __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+	friend class AndroidJNIIOSystem;
+#endif //__ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
 
 protected:
 	DefaultIOStream ();

code/Importer.cpp

@@ -65,6 +65,11 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "BaseProcess.h"
 
 #include "DefaultIOStream.h"
+#if __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+#include "AndroidJNIIOSystem.h"
+#include <android/asset_manager.h>
+#include <android/asset_manager_jni.h>
+#endif //__ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
 #include "DefaultIOSystem.h"
 #include "DefaultProgressHandler.h"
 #include "GenericProperty.h"
@@ -132,8 +137,8 @@ void AllocateFromAssimpHeap::operator delete[] ( void* data)	{
 }
 
 // ------------------------------------------------------------------------------------------------
-// Importer constructor. 
-Importer::Importer() 
+// Importer defaults loader.
+inline void Importer::InitDefaults()
 {
 	// allocate the pimpl first
 	pimpl = new ImporterPimpl();
@@ -162,6 +167,23 @@ Importer::Importer()
 	}
 }
 
+// ------------------------------------------------------------------------------------------------
+// Importer constructor.
+Importer::Importer()
+{
+	InitDefaults();
+}
+
+// ------------------------------------------------------------------------------------------------
+// Jni android Importer constructor to ease the assets access on Android JNI projects.
+#if __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+Importer::Importer(ANativeActivity* activity)
+{
+	InitDefaults();
+	SetIOHandler(new AndroidJNIIOSystem(activity));
+}
+#endif //__ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+
 // ------------------------------------------------------------------------------------------------
 // Destructor of Importer
 Importer::~Importer()

include/assimp/Importer.hpp

@@ -53,6 +53,14 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "types.h"
 #include "config.h"
 
+#if __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+#include <android/log.h>
+#include <android/asset_manager.h>
+#include <android/asset_manager_jni.h>
+#include <android/native_activity.h>
+#include <fstream>
+#endif //__ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+
 namespace Assimp	{
 	// =======================================================================
 	// Public interface to Assimp 
@@ -125,6 +133,15 @@ public:
 	 */
 	Importer();
 
+#if __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+	// -------------------------------------------------------------------
+	/** Constructor. Inits the AndroidJniIOSystem.
+	 *
+	 * Call ReadFile() to start the import process. The configuration
+	 * property table is initially empty.
+	 */
+	Importer(ANativeActivity* activity);
+#endif //__ANDROID__ and __ANDROID_API__ > 9 and defined(AI_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
 	// -------------------------------------------------------------------
 	/** Copy constructor.
 	 * 
@@ -134,6 +151,14 @@ public:
 	 */
 	Importer(const Importer& other);
 
+	// -------------------------------------------------------------------
+	/** Inits Importer defaults.
+	 *
+	 * This function inits the defaults for Importer class
+	 *
+	 */
+	void InitDefaults();
+
 	// -------------------------------------------------------------------
 	/** Destructor. The object kept ownership of the imported data,
 	 * which now will be destroyed along with the object. 

include/assimp/config.h

@@ -841,6 +841,14 @@ enum aiComponent
  */
 #define AI_CONFIG_IMPORT_IFC_SKIP_SPACE_REPRESENTATIONS "IMPORT_IFC_SKIP_SPACE_REPRESENTATIONS"
 
+ /** @brief Specifies whether the Android JNI asset extraction is supported.
+  *
+  * Turn on this option if you want to manage assets in native
+  * Android application without having to keep the internal directory and asset
+  * manager pointer.
+  */
+ #define AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT "AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT"
+
 
 // ---------------------------------------------------------------------------
 /** @brief Specifies whether the IFC loader skips over