Merge branch 'master' into preserve_error_string

2019-12-02 10:35:29 +00:00 · 2019-12-02 10:35:29 +00:00 · 631da3a3d1
parent 6f7cb6af06 6117c3f589
commit 631da3a3d1
46 changed files with 4770 additions and 2759 deletions
--- a/.gitignore
+++ b/.gitignore
@ -2,6 +2,7 @@
 build
 .project
 *.kdev4*
+.DS_Store

 # build artefacts
 *.o
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -253,7 +253,7 @@ ELSEIF(MSVC)
  IF(MSVC12)
    ADD_COMPILE_OPTIONS(/wd4351)
  ENDIF()
-  SET(CMAKE_CXX_FLAGS_DEBUG "/D_DEBUG /MDd /Ob2 /Zi")
+  SET(CMAKE_CXX_FLAGS_DEBUG "/D_DEBUG /MDd /Ob2 /Zi /O0")
 ELSEIF ( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
  IF(NOT HUNTER_ENABLED)
    SET(CMAKE_CXX_FLAGS "-fPIC -std=c++11 ${CMAKE_CXX_FLAGS}")
--- a/Readme.md
+++ b/Readme.md
@ -60,14 +60,19 @@ __Importers__:
 - ENFF
 - [FBX](https://en.wikipedia.org/wiki/FBX)
 - [glTF 1.0](https://en.wikipedia.org/wiki/GlTF#glTF_1.0) + GLB
- [glTF 2.0](https://en.wikipedia.org/wiki/GlTF#glTF_2.0)
+- [glTF 2.0](https://en.wikipedia.org/wiki/GlTF#glTF_2.0):
+  At the moment for glTF2.0 the following extensions are supported:
+  + KHR_lights_punctual ( 5.0 )
+  + KHR_materials_pbrSpecularGlossiness ( 5.0 )
+  + KHR_materials_unlit ( 5.0 )
+  + KHR_texture_transform ( 5.1 under test )
 - HMB
 - IFC-STEP
 - IRR / IRRMESH
 - [LWO](https://en.wikipedia.org/wiki/LightWave_3D)
 - LWS
 - LXO
- [M3D](https://gitlab.com/bztsrc/model3d)
+- [M3D](https://bztsrc.gitlab.io/model3d)
 - MD2
 - MD3
 - MD5
--- a/code/Collada/ColladaParser.cpp
+++ b/code/Collada/ColladaParser.cpp
@ -3234,13 +3234,12 @@ void ColladaParser::ReadScene()

 // ------------------------------------------------------------------------------------------------
 // Aborts the file reading with an exception
-AI_WONT_RETURN void ColladaParser::ThrowException(const std::string& pError) const
-{
+AI_WONT_RETURN void ColladaParser::ThrowException(const std::string& pError) const {
    throw DeadlyImportError(format() << "Collada: " << mFileName << " - " << pError);
 }
-void ColladaParser::ReportWarning(const char* msg, ...)
-{
-    ai_assert(NULL != msg);
+
+void ColladaParser::ReportWarning(const char* msg, ...) {
+    ai_assert(nullptr != msg);

    va_list args;
    va_start(args, msg);
@ -3255,11 +3254,11 @@ void ColladaParser::ReportWarning(const char* msg, ...)

 // ------------------------------------------------------------------------------------------------
 // Skips all data until the end node of the current element
-void ColladaParser::SkipElement()
-{
+void ColladaParser::SkipElement() {
    // nothing to skip if it's an <element />
-    if (mReader->isEmptyElement())
+    if (mReader->isEmptyElement()) {
        return;
+    }

    // reroute
    SkipElement(mReader->getNodeName());
@ -3267,63 +3266,75 @@ void ColladaParser::SkipElement()

 // ------------------------------------------------------------------------------------------------
 // Skips all data until the end node of the given element
-void ColladaParser::SkipElement(const char* pElement)
-{
+void ColladaParser::SkipElement(const char* pElement) {
    // copy the current node's name because it'a pointer to the reader's internal buffer,
    // which is going to change with the upcoming parsing
    std::string element = pElement;
-    while (mReader->read())
-    {
-        if (mReader->getNodeType() == irr::io::EXN_ELEMENT_END)
-            if (mReader->getNodeName() == element)
+    while (mReader->read()) {
+        if (mReader->getNodeType() == irr::io::EXN_ELEMENT_END) {
+            if (mReader->getNodeName() == element) {
                break;
+            }
+        }
    }
 }

 // ------------------------------------------------------------------------------------------------
 // Tests for an opening element of the given name, throws an exception if not found
-void ColladaParser::TestOpening(const char* pName)
-{
+void ColladaParser::TestOpening(const char* pName) {
    // read element start
-    if (!mReader->read())
+    if (!mReader->read()) {
        ThrowException(format() << "Unexpected end of file while beginning of <" << pName << "> element.");
+    }
    // whitespace in front is ok, just read again if found
-    if (mReader->getNodeType() == irr::io::EXN_TEXT)
-        if (!mReader->read())
+    if (mReader->getNodeType() == irr::io::EXN_TEXT) {
+        if (!mReader->read()) {
            ThrowException(format() << "Unexpected end of file while reading beginning of <" << pName << "> element.");
+        }
+    }

-    if (mReader->getNodeType() != irr::io::EXN_ELEMENT || strcmp(mReader->getNodeName(), pName) != 0)
+    if (mReader->getNodeType() != irr::io::EXN_ELEMENT || strcmp(mReader->getNodeName(), pName) != 0) {
        ThrowException(format() << "Expected start of <" << pName << "> element.");
+    }
 }

 // ------------------------------------------------------------------------------------------------
 // Tests for the closing tag of the given element, throws an exception if not found
-void ColladaParser::TestClosing(const char* pName)
-{
-    // check if we're already on the closing tag and return right away
-    if (mReader->getNodeType() == irr::io::EXN_ELEMENT_END && strcmp(mReader->getNodeName(), pName) == 0)
+void ColladaParser::TestClosing(const char* pName) {
+    // check if we have an empty (self-closing) element
+    if (mReader->isEmptyElement()) {
        return;
+    }
+
+    // check if we're already on the closing tag and return right away
+    if (mReader->getNodeType() == irr::io::EXN_ELEMENT_END && strcmp(mReader->getNodeName(), pName) == 0) {
+        return;
+    }

    // if not, read some more
-    if (!mReader->read())
+    if (!mReader->read()) {
        ThrowException(format() << "Unexpected end of file while reading end of <" << pName << "> element.");
+    }
    // whitespace in front is ok, just read again if found
-    if (mReader->getNodeType() == irr::io::EXN_TEXT)
-        if (!mReader->read())
+    if (mReader->getNodeType() == irr::io::EXN_TEXT) {
+        if (!mReader->read()) {
            ThrowException(format() << "Unexpected end of file while reading end of <" << pName << "> element.");
+        }
+    }

    // but this has the be the closing tag, or we're lost
-    if (mReader->getNodeType() != irr::io::EXN_ELEMENT_END || strcmp(mReader->getNodeName(), pName) != 0)
+    if (mReader->getNodeType() != irr::io::EXN_ELEMENT_END || strcmp(mReader->getNodeName(), pName) != 0) {
        ThrowException(format() << "Expected end of <" << pName << "> element.");
+    }
 }

 // ------------------------------------------------------------------------------------------------
 // Returns the index of the named attribute or -1 if not found. Does not throw, therefore useful for optional attributes
-int ColladaParser::GetAttribute(const char* pAttr) const
-{
+int ColladaParser::GetAttribute(const char* pAttr) const {
    int index = TestAttribute(pAttr);
-    if (index != -1)
+    if (index != -1) {
        return index;
+    }

    // attribute not found -> throw an exception
    ThrowException(format() << "Expected attribute \"" << pAttr << "\" for element <" << mReader->getNodeName() << ">.");
--- a/code/Common/DefaultLogger.cpp
+++ b/code/Common/DefaultLogger.cpp
@ -107,7 +107,7 @@ LogStream* LogStream::createDefaultStream(aiDefaultLogStream    streams,
        return nullptr;
 #endif

-        // Platform-independent default streams
+    // Platform-independent default streams
    case aiDefaultLogStream_STDERR:
        return new StdOStreamLogStream(std::cerr);
    case aiDefaultLogStream_STDOUT:
@ -121,7 +121,7 @@ LogStream* LogStream::createDefaultStream(aiDefaultLogStream    streams,
    };

    // For compilers without dead code path detection
-    return NULL;
+    return nullptr;
 }

 // ----------------------------------------------------------------------------------
--- a/code/Common/Exporter.cpp
+++ b/code/Common/Exporter.cpp
@ -445,8 +445,7 @@ aiReturn Exporter::Export( const aiScene* pScene, const char* pFormatId, const c

                ExportProperties emptyProperties;  // Never pass NULL ExportProperties so Exporters don't have to worry.
                ExportProperties* pProp = pProperties ? (ExportProperties*)pProperties : &emptyProperties;
-                                pProp->SetPropertyBool("bJoinIdenticalVertices", must_join_again);
-                                exp.mExportFunction(pPath,pimpl->mIOSystem.get(),scenecopy.get(), pProp);
+                pProp->SetPropertyBool("bJoinIdenticalVertices", must_join_again);
                exp.mExportFunction(pPath,pimpl->mIOSystem.get(),scenecopy.get(), pProp);

                pimpl->mProgressHandler->UpdateFileWrite(4, 4);
--- a/code/Common/Version.cpp
+++ b/code/Common/Version.cpp
@ -66,6 +66,12 @@ ASSIMP_API const char*  aiGetLegalString  ()    {
    return LEGAL_INFORMATION;
 }

+// ------------------------------------------------------------------------------------------------
+// Get Assimp patch version
+ASSIMP_API unsigned int aiGetVersionPatch() {
+	return VER_PATCH;
+}
+
 // ------------------------------------------------------------------------------------------------
 // Get Assimp minor version
 ASSIMP_API unsigned int aiGetVersionMinor ()    {
--- a/code/M3D/M3DExporter.cpp
+++ b/code/M3D/M3DExporter.cpp
@ -169,6 +169,33 @@ void M3DExporter::doExport (
    outfile.reset();
 }

+
+// ------------------------------------------------------------------------------------------------
+// helper to add a vertex (private to NodeWalk)
+m3dv_t *M3DExporter::AddVrtx(m3dv_t *vrtx, uint32_t *numvrtx, m3dv_t *v, uint32_t *idx)
+{
+    if(v->x == (M3D_FLOAT)-0.0) v->x = (M3D_FLOAT)0.0;
+    if(v->y == (M3D_FLOAT)-0.0) v->y = (M3D_FLOAT)0.0;
+    if(v->z == (M3D_FLOAT)-0.0) v->z = (M3D_FLOAT)0.0;
+    if(v->w == (M3D_FLOAT)-0.0) v->w = (M3D_FLOAT)0.0;
+    vrtx = (m3dv_t*)M3D_REALLOC(vrtx, ((*numvrtx) + 1) * sizeof(m3dv_t));
+    memcpy(&vrtx[*numvrtx], v, sizeof(m3dv_t));
+    *idx = *numvrtx;
+    (*numvrtx)++;
+    return vrtx;
+}
+
+// ------------------------------------------------------------------------------------------------
+// helper to add a tmap (private to NodeWalk)
+m3dti_t *M3DExporter::AddTmap(m3dti_t *tmap, uint32_t *numtmap, m3dti_t *ti, uint32_t *idx)
+{
+    tmap = (m3dti_t*)M3D_REALLOC(tmap, ((*numtmap) + 1) * sizeof(m3dti_t));
+    memcpy(&tmap[*numtmap], ti, sizeof(m3dti_t));
+    *idx = *numtmap;
+    (*numtmap)++;
+    return tmap;
+}
+
 // ------------------------------------------------------------------------------------------------
 // recursive node walker
 void M3DExporter::NodeWalk(const aiNode* pNode, aiMatrix4x4 m)
@ -221,25 +248,23 @@ void M3DExporter::NodeWalk(const aiNode* pNode, aiMatrix4x4 m)
                if(mesh->HasVertexColors(0))
                    vertex.color = mkColor(&mesh->mColors[0][l]);
                // save the vertex to the output
-                m3d->vertex = _m3d_addvrtx(m3d->vertex, &m3d->numvertex,
+                m3d->vertex = AddVrtx(m3d->vertex, &m3d->numvertex,
                    &vertex, &idx);
                m3d->face[n].vertex[k] = (M3D_INDEX)idx;
                // do we have texture coordinates?
                if(mesh->HasTextureCoords(0)) {
                    ti.u = mesh->mTextureCoords[0][l].x;
                    ti.v = mesh->mTextureCoords[0][l].y;
-                    m3d->tmap = _m3d_addtmap(m3d->tmap, &m3d->numtmap, &ti,
-                        &idx);
+                    m3d->tmap = AddTmap(m3d->tmap, &m3d->numtmap, &ti, &idx);
                    m3d->face[n].texcoord[k] = (M3D_INDEX)idx;
                }
                // do we have normal vectors?
                if(mesh->HasNormals()) {
-                    vertex.color = 0;
                    vertex.x = mesh->mNormals[l].x;
                    vertex.y = mesh->mNormals[l].y;
                    vertex.z = mesh->mNormals[l].z;
-                    m3d->vertex = _m3d_addnorm(m3d->vertex, &m3d->numvertex,
-                        &vertex, &idx);
+                    vertex.color = 0;
+                    m3d->vertex = AddVrtx(m3d->vertex, &m3d->numvertex, &vertex, &idx);
                    m3d->face[n].normal[k] = (M3D_INDEX)idx;
                }
            }
--- a/code/M3D/M3DExporter.h
+++ b/code/M3D/M3DExporter.h
@ -87,6 +87,8 @@ namespace Assimp

        // helper to do the recursive walking
        void NodeWalk(const aiNode* pNode, aiMatrix4x4 m);
+        m3dv_t *AddVrtx(m3dv_t *vrtx, uint32_t *numvrtx, m3dv_t *v, uint32_t *idx);
+        m3dti_t *AddTmap(m3dti_t *tmap, uint32_t *numtmap, m3dti_t *ti, uint32_t *idx);
        uint32_t mkColor(aiColor4D* c);
        M3D_INDEX addMaterial(const aiMaterial *mat);
        void addProp(m3dm_t *m, uint8_t type, uint32_t value);
--- a/code/M3D/M3DImporter.cpp
+++ b/code/M3D/M3DImporter.cpp
@ -44,6 +44,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 #define M3D_IMPLEMENTATION
 #define M3D_ASCII
+#define M3D_NONORMALS       /* leave the post-processing to Assimp */
+#define M3D_NOWEIGHTS
+#define M3D_NOANIMATION

 #include <assimp/IOStreamBuffer.h>
 #include <memory>
@ -104,16 +107,21 @@ extern "C" {
        std::string file(fn);
        std::unique_ptr<Assimp::IOStream> pStream(
            (reinterpret_cast<Assimp::IOSystem*>(m3dimporter_pIOHandler))->Open( file, "rb"));
-        size_t fileSize = pStream->FileSize();
-        // should be allocated with malloc(), because the library will call free() to deallocate
-        unsigned char *data = (unsigned char*)malloc(fileSize);
-        if( !data || !pStream.get() || !fileSize || fileSize != pStream->Read(data,1,fileSize)) {
+        size_t fileSize = 0;
+        unsigned char *data = NULL;
+        // sometimes pStream is nullptr for some reason (should be an empty object returning nothing I guess)
+        if(pStream) {
+            fileSize = pStream->FileSize();
+            // should be allocated with malloc(), because the library will call free() to deallocate
+            data = (unsigned char*)malloc(fileSize);
+            if( !data || !pStream.get() || !fileSize || fileSize != pStream->Read(data,1,fileSize)) {
+                pStream.reset();
+                *size = 0;
+                // don't throw a deadly exception, it's not fatal if we can't read an external asset
+                return nullptr;
+            }
            pStream.reset();
-            *size = 0;
-            // don't throw a deadly exception, it's not fatal if we can't read an external asset
-            return nullptr;
        }
-        pStream.reset();
        *size = (int)fileSize;
        return data;
    }
@ -307,7 +315,7 @@ void M3DImporter::importMaterials()
                m->prop[j].value.textureid < m3d->numtexture &&
                m3d->texture[m->prop[j].value.textureid].name) {
                    name.Set(std::string(std::string(m3d->texture[m->prop[j].value.textureid].name) + ".png"));
-                    mat->AddProperty(&name, aiProps[k].pKey, aiProps[k].type, aiProps[k].index);
+                    mat->AddProperty(&name, aiTxProps[k].pKey, aiTxProps[k].type, aiTxProps[k].index);
                    n = 0;
                    mat->AddProperty(&n, 1, _AI_MATKEY_UVWSRC_BASE, aiProps[k].type, aiProps[k].index);
            }
@ -321,6 +329,7 @@ void M3DImporter::importMaterials()
 void M3DImporter::importTextures()
 {
    unsigned int i;
+    const char *formatHint[] = { "rgba0800", "rgba0808", "rgba8880", "rgba8888" };
    m3dtx_t *t;

    ai_assert(mScene != nullptr);
@ -334,14 +343,29 @@ void M3DImporter::importTextures()

    mScene->mTextures = new aiTexture*[m3d->numtexture];
    for(i = 0; i < m3d->numtexture; i++) {
+        unsigned int j, k;
        t = &m3d->texture[i];
+        if(!t->w || !t->h || !t->f || !t->d) continue;
        aiTexture *tx = new aiTexture;
-        strcpy(tx->achFormatHint, "rgba8888");
+        strcpy(tx->achFormatHint, formatHint[t->f - 1]);
        tx->mFilename = aiString(std::string(t->name) + ".png");
        tx->mWidth = t->w;
        tx->mHeight = t->h;
        tx->pcData = new aiTexel[ tx->mWidth*tx->mHeight ];
-        memcpy(tx->pcData, t->d, tx->mWidth*tx->mHeight*4);
+        for(j = k = 0; j < tx->mWidth*tx->mHeight; j++) {
+            switch(t->f) {
+                case 1: tx->pcData[j].g = t->d[k++]; break;
+                case 2: tx->pcData[j].g = t->d[k++]; tx->pcData[j].a = t->d[k++]; break;
+                case 3:
+                    tx->pcData[j].r = t->d[k++]; tx->pcData[j].g = t->d[k++];
+                    tx->pcData[j].b = t->d[k++]; tx->pcData[j].a = 255;
+                break;
+                case 4:
+                    tx->pcData[j].r = t->d[k++]; tx->pcData[j].g = t->d[k++];
+                    tx->pcData[j].b = t->d[k++]; tx->pcData[j].a = t->d[k++];
+                break;
+            }
+        }
        mScene->mTextures[i] = tx;
    }
 }
@ -372,9 +396,14 @@ void M3DImporter::importMeshes()
        // we must switch mesh if material changes
        if(lastMat != m3d->face[i].materialid) {
            lastMat = m3d->face[i].materialid;
-            if(pMesh && vertices->size() && faces->size()) {
+            if(pMesh && vertices && vertices->size() && faces && faces->size()) {
                populateMesh(pMesh, faces, vertices, normals, texcoords, colors, vertexids);
                meshes->push_back(pMesh);
+                delete faces;
+                delete vertices;
+                delete normals;
+                delete texcoords;
+                delete colors;
                delete vertexids;   // this is not stored in pMesh, just to collect bone vertices
            }
            pMesh = new aiMesh;
@ -574,15 +603,15 @@ void M3DImporter::convertPose(aiMatrix4x4 *m, unsigned int posid, unsigned int o
        m->a2 = m->a3 = m->b1 = m->b3 = m->c1 = m->c2 = 0.0;
        m->a1 = m->b2 = m->c3 = -1.0;
    } else {
-        m->a1 = 1 - 2 * (q->y * q->y + q->z * q->z); if(m->a1 > -1e-7 && m->a1 < 1e-7) m->a1 = 0.0;
-        m->a2 = 2 * (q->x * q->y - q->z * q->w);     if(m->a2 > -1e-7 && m->a2 < 1e-7) m->a2 = 0.0;
-        m->a3 = 2 * (q->x * q->z + q->y * q->w);     if(m->a3 > -1e-7 && m->a3 < 1e-7) m->a3 = 0.0;
-        m->b1 = 2 * (q->x * q->y + q->z * q->w);     if(m->b1 > -1e-7 && m->b1 < 1e-7) m->b1 = 0.0;
-        m->b2 = 1 - 2 * (q->x * q->x + q->z * q->z); if(m->b2 > -1e-7 && m->b2 < 1e-7) m->b2 = 0.0;
-        m->b3 = 2 * (q->y * q->z - q->x * q->w);     if(m->b3 > -1e-7 && m->b3 < 1e-7) m->b3 = 0.0;
-        m->c1 = 2 * (q->x * q->z - q->y * q->w);     if(m->c1 > -1e-7 && m->c1 < 1e-7) m->c1 = 0.0;
-        m->c2 = 2 * (q->y * q->z + q->x * q->w);     if(m->c2 > -1e-7 && m->c2 < 1e-7) m->c2 = 0.0;
-        m->c3 = 1 - 2 * (q->x * q->x + q->y * q->y); if(m->c3 > -1e-7 && m->c3 < 1e-7) m->c3 = 0.0;
+        m->a1 = 1 - 2 * (q->y * q->y + q->z * q->z); if(m->a1 > -M3D_EPSILON && m->a1 < M3D_EPSILON) m->a1 = 0.0;
+        m->a2 = 2 * (q->x * q->y - q->z * q->w);     if(m->a2 > -M3D_EPSILON && m->a2 < M3D_EPSILON) m->a2 = 0.0;
+        m->a3 = 2 * (q->x * q->z + q->y * q->w);     if(m->a3 > -M3D_EPSILON && m->a3 < M3D_EPSILON) m->a3 = 0.0;
+        m->b1 = 2 * (q->x * q->y + q->z * q->w);     if(m->b1 > -M3D_EPSILON && m->b1 < M3D_EPSILON) m->b1 = 0.0;
+        m->b2 = 1 - 2 * (q->x * q->x + q->z * q->z); if(m->b2 > -M3D_EPSILON && m->b2 < M3D_EPSILON) m->b2 = 0.0;
+        m->b3 = 2 * (q->y * q->z - q->x * q->w);     if(m->b3 > -M3D_EPSILON && m->b3 < M3D_EPSILON) m->b3 = 0.0;
+        m->c1 = 2 * (q->x * q->z - q->y * q->w);     if(m->c1 > -M3D_EPSILON && m->c1 < M3D_EPSILON) m->c1 = 0.0;
+        m->c2 = 2 * (q->y * q->z + q->x * q->w);     if(m->c2 > -M3D_EPSILON && m->c2 < M3D_EPSILON) m->c2 = 0.0;
+        m->c3 = 1 - 2 * (q->x * q->x + q->y * q->y); if(m->c3 > -M3D_EPSILON && m->c3 < M3D_EPSILON) m->c3 = 0.0;
    }

    /* set translation */
--- a/code/M3D/M3DMaterials.h
+++ b/code/M3D/M3DMaterials.h
@ -75,7 +75,7 @@ static const aiMatProp aiProps[] = {
    { AI_MATKEY_REFLECTIVITY },                                 /* m3dp_Pm */
    { NULL, 0, 0 },                                             /* m3dp_Ps */
    { AI_MATKEY_REFRACTI },                                     /* m3dp_Ni */
-    { NULL, 0, 0 },
+    { NULL, 0, 0 },                                             /* m3dp_Nt */
    { NULL, 0, 0 },
    { NULL, 0, 0 },
    { NULL, 0, 0 }
@ -97,7 +97,7 @@ static const aiMatProp aiTxProps[] = {
    { AI_MATKEY_TEXTURE(aiTextureType_METALNESS,0) },        /* m3dp_map_Pm */
    { NULL, 0, 0 },                                          /* m3dp_map_Ps */
    { AI_MATKEY_TEXTURE(aiTextureType_AMBIENT_OCCLUSION,0) },/* m3dp_map_Ni */
-    { NULL, 0, 0 },
+    { NULL, 0, 0 },                                          /* m3dp_map_Nt */
    { NULL, 0, 0 },
    { NULL, 0, 0 },
    { NULL, 0, 0 }
--- a/code/M3D/m3d.h
+++ b/code/M3D/m3d.h
--- a/code/Material/MaterialSystem.cpp
+++ b/code/Material/MaterialSystem.cpp
@ -273,14 +273,14 @@ aiReturn aiGetMaterialColor(const aiMaterial* pMat,
 }

 // ------------------------------------------------------------------------------------------------
-// Get a aiUVTransform (4 floats) from the material
+// Get a aiUVTransform (5 floats) from the material
 aiReturn aiGetMaterialUVTransform(const aiMaterial* pMat,
    const char* pKey,
    unsigned int type,
    unsigned int index,
    aiUVTransform* pOut)
 {
-    unsigned int iMax = 4;
+    unsigned int iMax = 5;
    return aiGetMaterialFloatArray(pMat,pKey,type,index,(ai_real*)pOut,&iMax);
 }

@ -471,12 +471,12 @@ aiReturn aiMaterial::AddBinaryProperty (const void* pInput,
    aiPropertyTypeInfo pType
    )
 {
-    ai_assert( pInput != NULL );
-    ai_assert( pKey != NULL );
+    ai_assert( pInput != nullptr );
+	ai_assert(pKey != nullptr );
    ai_assert( 0 != pSizeInBytes );

    if ( 0 == pSizeInBytes ) {
-
+		return AI_FAILURE;
    }

    // first search the list whether there is already an entry with this key
--- a/code/PostProcessing/ValidateDataStructure.cpp
+++ b/code/PostProcessing/ValidateDataStructure.cpp
@ -603,15 +603,18 @@ void ValidateDSProcess::SearchForInvalidTextures(const aiMaterial* pMaterial,
        ReportError("%s #%i is set, but there are only %i %s textures",
            szType,iIndex,iNumIndices,szType);
    }
-    if (!iNumIndices)return;
+	if (!iNumIndices) {
+		return;
+	}
    std::vector<aiTextureMapping> mappings(iNumIndices);

    // Now check whether all UV indices are valid ...
    bool bNoSpecified = true;
-    for (unsigned int i = 0; i < pMaterial->mNumProperties;++i)
-    {
+    for (unsigned int i = 0; i < pMaterial->mNumProperties;++i) {
        aiMaterialProperty* prop = pMaterial->mProperties[i];
-        if (prop->mSemantic != type)continue;
+		if (prop->mSemantic != type) {
+			continue;
+		}

        if ((int)prop->mIndex >= iNumIndices)
        {
@ -634,7 +637,7 @@ void ValidateDSProcess::SearchForInvalidTextures(const aiMaterial* pMaterial,
                ReportError("Material property %s%i is expected to be 5 floats large (size is %i)",
                    prop->mKey.data,prop->mIndex, prop->mDataLength);
            }
-            mappings[prop->mIndex] = *((aiTextureMapping*)prop->mData);
+			//mappings[prop->mIndex] = ((aiUVTransform*)prop->mData);
        }
        else if (!::strcmp(prop->mKey.data,"$tex.uvwsrc")) {
            if (aiPTI_Integer != prop->mType || sizeof(int) > prop->mDataLength)
--- a/code/glTF/glTFAsset.inl
+++ b/code/glTF/glTFAsset.inl
@ -1427,9 +1427,6 @@ inline void Asset::ReadExtensionsUsed(Document& doc)
        }
    }

-    #define CHECK_EXT(EXT) \
-        if (exts.find(#EXT) != exts.end()) extensionsUsed.EXT = true;
-
    CHECK_EXT(KHR_binary_glTF);
    CHECK_EXT(KHR_materials_common);

--- a/code/glTF/glTFCommon.h
+++ b/code/glTF/glTFCommon.h
@ -188,7 +188,7 @@ namespace glTFCommon {
        size_t DecodeBase64(const char* in, size_t inLength, uint8_t*& out);

        inline
-            size_t DecodeBase64(const char* in, uint8_t*& out) {
+        size_t DecodeBase64(const char* in, uint8_t*& out) {
            return DecodeBase64(in, strlen(in), out);
        }

@ -221,25 +221,22 @@ namespace glTFCommon {
        };

        inline
-            char EncodeCharBase64(uint8_t b) {
+        char EncodeCharBase64(uint8_t b) {
            return "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="[size_t(b)];
        }

        inline
-            uint8_t DecodeCharBase64(char c) {
+        uint8_t DecodeCharBase64(char c) {
            return DATA<true>::tableDecodeBase64[size_t(c)]; // TODO faster with lookup table or ifs?
-            /*if (c >= 'A' && c <= 'Z') return c - 'A';
-            if (c >= 'a' && c <= 'z') return c - 'a' + 26;
-            if (c >= '0' && c <= '9') return c - '0' + 52;
-            if (c == '+') return 62;
-            if (c == '/') return 63;
-            return 64; // '-' */
        }

        size_t DecodeBase64(const char* in, size_t inLength, uint8_t*& out);

        void EncodeBase64(const uint8_t* in, size_t inLength, std::string& out);
-    }
+    } // namespace Util
+
+#define CHECK_EXT(EXT) \
+	if (exts.find(#EXT) != exts.end()) extensionsUsed.EXT = true;

 }

--- a/code/glTF2/glTF2Asset.h
+++ b/code/glTF2/glTF2Asset.h
@ -685,6 +685,13 @@ namespace glTF2
        Ref<Texture> texture;
        unsigned int index;
        unsigned int texCoord = 0;
+
+        bool textureTransformSupported = false;
+        struct TextureTransformExt {
+			float offset[2];
+			float rotation;
+			float scale[2];
+		} TextureTransformExt_t;
    };

    struct NormalTextureInfo : TextureInfo
@ -1024,9 +1031,15 @@ namespace glTF2
            bool KHR_materials_pbrSpecularGlossiness;
            bool KHR_materials_unlit;
            bool KHR_lights_punctual;
-
+			bool KHR_texture_transform;
        } extensionsUsed;

+        //! Keeps info about the required extensions
+        struct RequiredExtensions
+        {
+            bool KHR_draco_mesh_compression;
+        } extensionsRequired;
+
        AssetMetadata asset;


@ -1069,6 +1082,7 @@ namespace glTF2
            , textures      (*this, "textures")
        {
            memset(&extensionsUsed, 0, sizeof(extensionsUsed));
+            memset(&extensionsRequired, 0, sizeof(extensionsRequired));
        }

        //! Main function
@ -1087,6 +1101,7 @@ namespace glTF2
        void ReadBinaryHeader(IOStream& stream, std::vector<char>& sceneData);

        void ReadExtensionsUsed(Document& doc);
+        void ReadExtensionsRequired(Document& doc);

        IOStream* OpenFile(std::string path, const char* mode, bool absolute = false);
    };
--- a/code/glTF2/glTF2Asset.inl
+++ b/code/glTF2/glTF2Asset.inl
@ -800,8 +800,34 @@ inline void Texture::Read(Value& obj, Asset& r)
 }

 namespace {
-    inline void SetTextureProperties(Asset& r, Value* prop, TextureInfo& out)
-    {
+    inline void SetTextureProperties(Asset& r, Value* prop, TextureInfo& out) {
+	    if (r.extensionsUsed.KHR_texture_transform) {
+            if (Value *extensions = FindObject(*prop, "extensions")) {
+				out.textureTransformSupported = true;
+                if (Value *pKHR_texture_transform = FindObject(*extensions, "KHR_texture_transform")) {
+					if (Value *array = FindArray(*pKHR_texture_transform, "offset")) {
+						out.TextureTransformExt_t.offset[0] = (*array)[0].GetFloat();
+						out.TextureTransformExt_t.offset[1] = (*array)[1].GetFloat();
+					} else {
+						out.TextureTransformExt_t.offset[0] = 0;
+						out.TextureTransformExt_t.offset[1] = 0;
+					}      
+					
+                    if (!ReadMember(*pKHR_texture_transform, "rotation", out.TextureTransformExt_t.rotation)) {
+						out.TextureTransformExt_t.rotation = 0;					
+                    }
+					
+                    if (Value *array = FindArray(*pKHR_texture_transform, "scale")) {
+						out.TextureTransformExt_t.scale[0] = (*array)[0].GetFloat();
+						out.TextureTransformExt_t.scale[1] = (*array)[1].GetFloat();
+					} else {
+						out.TextureTransformExt_t.scale[0] = 1;
+						out.TextureTransformExt_t.scale[1] = 1;
+                    }
+				}
+			}
+        }
+
        if (Value* index = FindUInt(*prop, "index")) {
            out.texture = r.textures.Retrieve(index->GetUint());
        }
@ -877,6 +903,9 @@ inline void Material::Read(Value& material, Asset& r)
            }
        }

+        if (r.extensionsUsed.KHR_texture_transform) {
+		}
+
        unlit = nullptr != FindObject(*extensions, "KHR_materials_unlit");
    }
 }
@ -1403,6 +1432,12 @@ inline void Asset::Load(const std::string& pFile, bool isBinary)
    // Load the metadata
    asset.Read(doc);
    ReadExtensionsUsed(doc);
+    ReadExtensionsRequired(doc);
+
+    // Currently Draco is not supported
+    if (extensionsRequired.KHR_draco_mesh_compression) {
+        throw DeadlyImportError("GLTF: Draco mesh compression not currently supported.");
+    }

    // Prepare the dictionaries
    for (size_t i = 0; i < mDicts.size(); ++i) {
@ -1449,6 +1484,29 @@ inline void Asset::SetAsBinary()
    }
 }

+// As required extensions are only a concept in glTF 2.0, this is here
+// instead of glTFCommon.h
+#define CHECK_REQUIRED_EXT(EXT) \
+	if (exts.find(#EXT) != exts.end()) extensionsRequired.EXT = true;
+
+inline void Asset::ReadExtensionsRequired(Document& doc)
+{
+    Value* extsRequired = FindArray(doc, "extensionsRequired");
+    if (nullptr == extsRequired) {
+	return;
+    }
+
+    std::gltf_unordered_map<std::string, bool> exts;
+    for (unsigned int i = 0; i < extsRequired->Size(); ++i) {
+        if ((*extsRequired)[i].IsString()) {
+            exts[(*extsRequired)[i].GetString()] = true;
+        }
+    }
+
+    CHECK_REQUIRED_EXT(KHR_draco_mesh_compression);
+
+    #undef CHECK_REQUIRED_EXT
+}

 inline void Asset::ReadExtensionsUsed(Document& doc)
 {
@ -1463,12 +1521,10 @@ inline void Asset::ReadExtensionsUsed(Document& doc)
        }
    }

-    #define CHECK_EXT(EXT) \
-        if (exts.find(#EXT) != exts.end()) extensionsUsed.EXT = true;
-
    CHECK_EXT(KHR_materials_pbrSpecularGlossiness);
    CHECK_EXT(KHR_materials_unlit);
    CHECK_EXT(KHR_lights_punctual);
+	CHECK_EXT(KHR_texture_transform);

    #undef CHECK_EXT
 }
--- a/code/glTF2/glTF2Exporter.h
+++ b/code/glTF2/glTF2Exporter.h
@ -74,6 +74,7 @@ namespace glTF2
    struct Texture;

    // Vec/matrix types, as raw float arrays
+	typedef float (vec2)[2];
    typedef float (vec3)[3];
    typedef float (vec4)[4];
 }
--- a/code/glTF2/glTF2Importer.cpp
+++ b/code/glTF2/glTF2Importer.cpp
--- a/contrib/zip/.gitignore
+++ b/contrib/zip/.gitignore
@ -1,6 +1,7 @@
 /build/
 /test/build/
 /xcodeproj/
+.vscode/

 # Object files
 *.o
@ -54,3 +55,4 @@ zip.dir/
 test/test.exe.vcxproj.filters
 test/test.exe.vcxproj
 test/test.exe.dir/
+
--- a/contrib/zip/CMakeLists.txt
+++ b/contrib/zip/CMakeLists.txt
@ -1,10 +1,14 @@
-cmake_minimum_required(VERSION 2.8)
-project(zip)
-enable_language(C)
+cmake_minimum_required(VERSION 3.0)
+
+project(zip
+  LANGUAGES C
+  VERSION "0.1.15")
 set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake" ${CMAKE_MODULE_PATH})

+option(CMAKE_DISABLE_TESTING "Disable test creation" OFF)
+
 if (MSVC)
-  # Use secure functions by defaualt and suppress warnings about "deprecated" functions
+  # Use secure functions by default and suppress warnings about "deprecated" functions
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES=1")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES_COUNT=1")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D _CRT_NONSTDC_NO_WARNINGS=1 /D _CRT_SECURE_NO_WARNINGS=1")
@ -12,28 +16,80 @@ elseif ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU" OR
        "${CMAKE_C_COMPILER_ID}" STREQUAL "Clang" OR
        "${CMAKE_C_COMPILER_ID}" STREQUAL "AppleClang")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99 -Wall -Wextra -Werror -pedantic")
+  if(ENABLE_COVERAGE)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --coverage")
+  endif()
 endif (MSVC)

 # zip
 set(SRC src/miniz.h src/zip.h src/zip.c)
 add_library(${PROJECT_NAME} ${SRC})
-target_include_directories(${PROJECT_NAME} INTERFACE src)
+target_include_directories(${PROJECT_NAME} PUBLIC
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
+  $<INSTALL_INTERFACE:include>
+)

 # test
 if (NOT CMAKE_DISABLE_TESTING)
  enable_testing()
  add_subdirectory(test)
  find_package(Sanitizers)
-  add_sanitizers(${PROJECT_NAME} test.exe)
-  add_sanitizers(${PROJECT_NAME} test_miniz.exe)
+  add_sanitizers(${PROJECT_NAME} ${test_out} ${test_miniz_out})
 endif()

+####
+# Installation (https://github.com/forexample/package-example) {
+
+set(CONFIG_INSTALL_DIR "lib/cmake/${PROJECT_NAME}")
+set(INCLUDE_INSTALL_DIR "include")
+
+set(GENERATED_DIR "${CMAKE_CURRENT_BINARY_DIR}/generated")
+
+# Configuration
+set(VERSION_CONFIG "${GENERATED_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
+set(PROJECT_CONFIG "${GENERATED_DIR}/${PROJECT_NAME}Config.cmake")
+set(TARGETS_EXPORT_NAME "${PROJECT_NAME}Targets")
+set(NAMESPACE "${PROJECT_NAME}::")
+
+# Include module with fuction 'write_basic_package_version_file'
+include(CMakePackageConfigHelpers)
+
+# Note: PROJECT_VERSION is used as a VERSION
+write_basic_package_version_file(
+    "${VERSION_CONFIG}" COMPATIBILITY SameMajorVersion
+)
+
+# Use variables:
+#   * TARGETS_EXPORT_NAME
+#   * PROJECT_NAME
+configure_package_config_file(
+    "cmake/Config.cmake.in"
+    "${PROJECT_CONFIG}"
+    INSTALL_DESTINATION "${CONFIG_INSTALL_DIR}"
+)
+
+install(
+    FILES "${PROJECT_CONFIG}" "${VERSION_CONFIG}"
+    DESTINATION "${CONFIG_INSTALL_DIR}"
+)
+
+install(
+    EXPORT "${TARGETS_EXPORT_NAME}"
+    NAMESPACE "${NAMESPACE}"
+    DESTINATION "${CONFIG_INSTALL_DIR}"
+)
+
+# }
+
 install(TARGETS ${PROJECT_NAME}
+        EXPORT ${TARGETS_EXPORT_NAME}
        RUNTIME DESTINATION bin
        ARCHIVE DESTINATION lib
        LIBRARY DESTINATION lib
-        COMPONENT library)
-install(FILES ${PROJECT_SOURCE_DIR}/src/zip.h DESTINATION include)
+        INCLUDES DESTINATION ${INCLUDE_INSTALL_DIR}
+)
+install(FILES ${PROJECT_SOURCE_DIR}/src/zip.h DESTINATION ${INCLUDE_INSTALL_DIR}/zip)

 # uninstall target (https://gitlab.kitware.com/cmake/community/wikis/FAQ#can-i-do-make-uninstall-with-cmake)
 if(NOT TARGET uninstall)
@ -45,3 +101,12 @@ if(NOT TARGET uninstall)
    add_custom_target(uninstall
        COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake/cmake_uninstall.cmake)
 endif()
+
+find_package(Doxygen)
+if(DOXYGEN_FOUND)
+    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
+    add_custom_target(doc
+        ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
+        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+        COMMENT "Generating API documentation with Doxygen" VERBATIM)
+endif()
--- a/contrib/zip/README.md
+++ b/contrib/zip/README.md
@ -71,7 +71,7 @@ int arg = 2;
 zip_extract("foo.zip", "/tmp", on_extract_entry, &arg);
 ```

-*   Extract a zip entry into memory.
+* Extract a zip entry into memory.
 ```c
 void *buf = NULL;
 size_t bufsize;
@ -89,7 +89,7 @@ zip_close(zip);
 free(buf);
 ```

-*   Extract a zip entry into memory (no internal allocation).
+* Extract a zip entry into memory (no internal allocation).
 ```c
 unsigned char *buf;
 size_t bufsize;
@ -110,7 +110,7 @@ zip_close(zip);
 free(buf);
 ```

-*   Extract a zip entry into memory using callback.
+* Extract a zip entry into memory using callback.
 ```c
 struct buffer_t {
    char *data;
@ -144,7 +144,7 @@ free(buf.data);
 ```


-*   Extract a zip entry into a file.
+* Extract a zip entry into a file.
 ```c
 struct zip_t *zip = zip_open("foo.zip", 0, 'r');
 {
@ -157,7 +157,7 @@ struct zip_t *zip = zip_open("foo.zip", 0, 'r');
 zip_close(zip);
 ```

-*   List of all zip entries
+* List of all zip entries
 ```c
 struct zip_t *zip = zip_open("foo.zip", 0, 'r');
 int i, n = zip_total_entries(zip);
@ -174,7 +174,7 @@ for (i = 0; i < n; ++i) {
 zip_close(zip);
 ```

-## Bindings
+# Bindings
 Compile zip library as a dynamic library.
 ```shell
 $ mkdir build
--- a/contrib/zip/appveyor.yml
+++ b/contrib/zip/appveyor.yml
@ -1,4 +1,4 @@
-version: zip-0.1.9.{build}
+version: zip-0.1.15.{build}
 build_script:
 - cmd: >-
    cd c:\projects\zip
--- a/contrib/zip/src/miniz.h
+++ b/contrib/zip/src/miniz.h
@ -221,6 +221,7 @@
 #ifndef MINIZ_HEADER_INCLUDED
 #define MINIZ_HEADER_INCLUDED

+#include <stdint.h>
 #include <stdlib.h>

 // Defines to completely disable specific portions of miniz.c:
@ -284,7 +285,8 @@
 /* Set MINIZ_USE_UNALIGNED_LOADS_AND_STORES only if not set */
 #if !defined(MINIZ_USE_UNALIGNED_LOADS_AND_STORES)
 #if MINIZ_X86_OR_X64_CPU
-/* Set MINIZ_USE_UNALIGNED_LOADS_AND_STORES to 1 on CPU's that permit efficient integer loads and stores from unaligned addresses. */
+/* Set MINIZ_USE_UNALIGNED_LOADS_AND_STORES to 1 on CPU's that permit efficient
+ * integer loads and stores from unaligned addresses. */
 #define MINIZ_USE_UNALIGNED_LOADS_AND_STORES 1
 #define MINIZ_UNALIGNED_USE_MEMCPY
 #else
@ -354,6 +356,44 @@ enum {
  MZ_FIXED = 4
 };

+/* miniz error codes. Be sure to update mz_zip_get_error_string() if you add or
+ * modify this enum. */
+typedef enum {
+  MZ_ZIP_NO_ERROR = 0,
+  MZ_ZIP_UNDEFINED_ERROR,
+  MZ_ZIP_TOO_MANY_FILES,
+  MZ_ZIP_FILE_TOO_LARGE,
+  MZ_ZIP_UNSUPPORTED_METHOD,
+  MZ_ZIP_UNSUPPORTED_ENCRYPTION,
+  MZ_ZIP_UNSUPPORTED_FEATURE,
+  MZ_ZIP_FAILED_FINDING_CENTRAL_DIR,
+  MZ_ZIP_NOT_AN_ARCHIVE,
+  MZ_ZIP_INVALID_HEADER_OR_CORRUPTED,
+  MZ_ZIP_UNSUPPORTED_MULTIDISK,
+  MZ_ZIP_DECOMPRESSION_FAILED,
+  MZ_ZIP_COMPRESSION_FAILED,
+  MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE,
+  MZ_ZIP_CRC_CHECK_FAILED,
+  MZ_ZIP_UNSUPPORTED_CDIR_SIZE,
+  MZ_ZIP_ALLOC_FAILED,
+  MZ_ZIP_FILE_OPEN_FAILED,
+  MZ_ZIP_FILE_CREATE_FAILED,
+  MZ_ZIP_FILE_WRITE_FAILED,
+  MZ_ZIP_FILE_READ_FAILED,
+  MZ_ZIP_FILE_CLOSE_FAILED,
+  MZ_ZIP_FILE_SEEK_FAILED,
+  MZ_ZIP_FILE_STAT_FAILED,
+  MZ_ZIP_INVALID_PARAMETER,
+  MZ_ZIP_INVALID_FILENAME,
+  MZ_ZIP_BUF_TOO_SMALL,
+  MZ_ZIP_INTERNAL_ERROR,
+  MZ_ZIP_FILE_NOT_FOUND,
+  MZ_ZIP_ARCHIVE_TOO_LARGE,
+  MZ_ZIP_VALIDATION_FAILED,
+  MZ_ZIP_WRITE_CALLBACK_FAILED,
+  MZ_ZIP_TOTAL_ERRORS
+} mz_zip_error;
+
 // Method
 #define MZ_DEFLATED 8

@ -696,6 +736,7 @@ typedef size_t (*mz_file_read_func)(void *pOpaque, mz_uint64 file_ofs,
                                    void *pBuf, size_t n);
 typedef size_t (*mz_file_write_func)(void *pOpaque, mz_uint64 file_ofs,
                                     const void *pBuf, size_t n);
+typedef mz_bool (*mz_file_needs_keepalive)(void *pOpaque);

 struct mz_zip_internal_state_tag;
 typedef struct mz_zip_internal_state_tag mz_zip_internal_state;
@ -707,13 +748,27 @@ typedef enum {
  MZ_ZIP_MODE_WRITING_HAS_BEEN_FINALIZED = 3
 } mz_zip_mode;

-typedef struct mz_zip_archive_tag {
+typedef enum {
+  MZ_ZIP_TYPE_INVALID = 0,
+  MZ_ZIP_TYPE_USER,
+  MZ_ZIP_TYPE_MEMORY,
+  MZ_ZIP_TYPE_HEAP,
+  MZ_ZIP_TYPE_FILE,
+  MZ_ZIP_TYPE_CFILE,
+  MZ_ZIP_TOTAL_TYPES
+} mz_zip_type;
+
+typedef struct {
  mz_uint64 m_archive_size;
  mz_uint64 m_central_directory_file_ofs;
-  mz_uint m_total_files;
-  mz_zip_mode m_zip_mode;

-  mz_uint m_file_offset_alignment;
+  /* We only support up to UINT32_MAX files in zip64 mode. */
+  mz_uint32 m_total_files;
+  mz_zip_mode m_zip_mode;
+  mz_zip_type m_zip_type;
+  mz_zip_error m_last_error;
+
+  mz_uint64 m_file_offset_alignment;

  mz_alloc_func m_pAlloc;
  mz_free_func m_pFree;
@ -722,6 +777,7 @@ typedef struct mz_zip_archive_tag {

  mz_file_read_func m_pRead;
  mz_file_write_func m_pWrite;
+  mz_file_needs_keepalive m_pNeeds_keepalive;
  void *m_pIO_opaque;

  mz_zip_internal_state *m_pState;
@ -1263,6 +1319,9 @@ mz_uint tdefl_create_comp_flags_from_zip_params(int level, int window_bits,
                                                int strategy);
 #endif // #ifndef MINIZ_NO_ZLIB_APIS

+#define MZ_UINT16_MAX (0xFFFFU)
+#define MZ_UINT32_MAX (0xFFFFFFFFU)
+
 #ifdef __cplusplus
 }
 #endif
@ -1311,6 +1370,11 @@ typedef unsigned char mz_validate_uint64[sizeof(mz_uint64) == 8 ? 1 : -1];
   ((mz_uint32)(((const mz_uint8 *)(p))[3]) << 24U))
 #endif

+#define MZ_READ_LE64(p)                                                        \
+  (((mz_uint64)MZ_READ_LE32(p)) |                                              \
+   (((mz_uint64)MZ_READ_LE32((const mz_uint8 *)(p) + sizeof(mz_uint32)))       \
+    << 32U))
+
 #ifdef _MSC_VER
 #define MZ_FORCEINLINE __forceinline
 #elif defined(__GNUC__)
@ -4160,6 +4224,17 @@ enum {
  MZ_ZIP_LOCAL_DIR_HEADER_SIZE = 30,
  MZ_ZIP_CENTRAL_DIR_HEADER_SIZE = 46,
  MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE = 22,
+
+  /* ZIP64 archive identifier and record sizes */
+  MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIG = 0x06064b50,
+  MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIG = 0x07064b50,
+  MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE = 56,
+  MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE = 20,
+  MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID = 0x0001,
+  MZ_ZIP_DATA_DESCRIPTOR_ID = 0x08074b50,
+  MZ_ZIP_DATA_DESCRIPTER_SIZE64 = 24,
+  MZ_ZIP_DATA_DESCRIPTER_SIZE32 = 16,
+
  // Central directory header record offsets
  MZ_ZIP_CDH_SIG_OFS = 0,
  MZ_ZIP_CDH_VERSION_MADE_BY_OFS = 4,
@ -4199,6 +4274,31 @@ enum {
  MZ_ZIP_ECDH_CDIR_SIZE_OFS = 12,
  MZ_ZIP_ECDH_CDIR_OFS_OFS = 16,
  MZ_ZIP_ECDH_COMMENT_SIZE_OFS = 20,
+
+  /* ZIP64 End of central directory locator offsets */
+  MZ_ZIP64_ECDL_SIG_OFS = 0,                    /* 4 bytes */
+  MZ_ZIP64_ECDL_NUM_DISK_CDIR_OFS = 4,          /* 4 bytes */
+  MZ_ZIP64_ECDL_REL_OFS_TO_ZIP64_ECDR_OFS = 8,  /* 8 bytes */
+  MZ_ZIP64_ECDL_TOTAL_NUMBER_OF_DISKS_OFS = 16, /* 4 bytes */
+
+  /* ZIP64 End of central directory header offsets */
+  MZ_ZIP64_ECDH_SIG_OFS = 0,                       /* 4 bytes */
+  MZ_ZIP64_ECDH_SIZE_OF_RECORD_OFS = 4,            /* 8 bytes */
+  MZ_ZIP64_ECDH_VERSION_MADE_BY_OFS = 12,          /* 2 bytes */
+  MZ_ZIP64_ECDH_VERSION_NEEDED_OFS = 14,           /* 2 bytes */
+  MZ_ZIP64_ECDH_NUM_THIS_DISK_OFS = 16,            /* 4 bytes */
+  MZ_ZIP64_ECDH_NUM_DISK_CDIR_OFS = 20,            /* 4 bytes */
+  MZ_ZIP64_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS = 24, /* 8 bytes */
+  MZ_ZIP64_ECDH_CDIR_TOTAL_ENTRIES_OFS = 32,       /* 8 bytes */
+  MZ_ZIP64_ECDH_CDIR_SIZE_OFS = 40,                /* 8 bytes */
+  MZ_ZIP64_ECDH_CDIR_OFS_OFS = 48,                 /* 8 bytes */
+  MZ_ZIP_VERSION_MADE_BY_DOS_FILESYSTEM_ID = 0,
+  MZ_ZIP_DOS_DIR_ATTRIBUTE_BITFLAG = 0x10,
+  MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED = 1,
+  MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG = 32,
+  MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION = 64,
+  MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_LOCAL_DIR_IS_MASKED = 8192,
+  MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_UTF8 = 1 << 11
 };

 typedef struct {
@ -4211,7 +4311,24 @@ struct mz_zip_internal_state_tag {
  mz_zip_array m_central_dir;
  mz_zip_array m_central_dir_offsets;
  mz_zip_array m_sorted_central_dir_offsets;
+
+  /* The flags passed in when the archive is initially opened. */
+  uint32_t m_init_flags;
+
+  /* MZ_TRUE if the archive has a zip64 end of central directory headers, etc.
+   */
+  mz_bool m_zip64;
+
+  /* MZ_TRUE if we found zip64 extended info in the central directory (m_zip64
+   * will also be slammed to true too, even if we didn't find a zip64 end of
+   * central dir header, etc.) */
+  mz_bool m_zip64_has_extended_info_fields;
+
+  /* These fields are used by the file, FILE, memory, and memory/heap read/write
+   * helpers. */
  MZ_FILE *m_pFile;
+  mz_uint64 m_file_archive_start_ofs;
+
  void *m_pMem;
  size_t m_mem_size;
  size_t m_mem_capacity;
@ -4363,6 +4480,13 @@ static mz_bool mz_zip_set_file_times(const char *pFilename, time_t access_time,
 #endif /* #ifndef MINIZ_NO_STDIO */
 #endif /* #ifndef MINIZ_NO_TIME */

+static MZ_FORCEINLINE mz_bool mz_zip_set_error(mz_zip_archive *pZip,
+                                               mz_zip_error err_num) {
+  if (pZip)
+    pZip->m_last_error = err_num;
+  return MZ_FALSE;
+}
+
 static mz_bool mz_zip_reader_init_internal(mz_zip_archive *pZip,
                                           mz_uint32 flags) {
  (void)flags;
@ -4480,127 +4604,346 @@ mz_zip_reader_sort_central_dir_offsets_by_filename(mz_zip_archive *pZip) {
  }
 }

-static mz_bool mz_zip_reader_read_central_dir(mz_zip_archive *pZip,
-                                              mz_uint32 flags) {
-  mz_uint cdir_size, num_this_disk, cdir_disk_index;
-  mz_uint64 cdir_ofs;
+static mz_bool mz_zip_reader_locate_header_sig(mz_zip_archive *pZip,
+                                               mz_uint32 record_sig,
+                                               mz_uint32 record_size,
+                                               mz_int64 *pOfs) {
  mz_int64 cur_file_ofs;
-  const mz_uint8 *p;
  mz_uint32 buf_u32[4096 / sizeof(mz_uint32)];
  mz_uint8 *pBuf = (mz_uint8 *)buf_u32;
-  mz_bool sort_central_dir =
-      ((flags & MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY) == 0);
-  // Basic sanity checks - reject files which are too small, and check the first
-  // 4 bytes of the file to make sure a local header is there.
-  if (pZip->m_archive_size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)
+
+  /* Basic sanity checks - reject files which are too small */
+  if (pZip->m_archive_size < record_size)
    return MZ_FALSE;
-  // Find the end of central directory record by scanning the file from the end
-  // towards the beginning.
+
+  /* Find the record by scanning the file from the end towards the beginning. */
  cur_file_ofs =
      MZ_MAX((mz_int64)pZip->m_archive_size - (mz_int64)sizeof(buf_u32), 0);
  for (;;) {
    int i,
        n = (int)MZ_MIN(sizeof(buf_u32), pZip->m_archive_size - cur_file_ofs);
+
    if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pBuf, n) != (mz_uint)n)
      return MZ_FALSE;
-    for (i = n - 4; i >= 0; --i)
-      if (MZ_READ_LE32(pBuf + i) == MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG)
-        break;
+
+    for (i = n - 4; i >= 0; --i) {
+      mz_uint s = MZ_READ_LE32(pBuf + i);
+      if (s == record_sig) {
+        if ((pZip->m_archive_size - (cur_file_ofs + i)) >= record_size)
+          break;
+      }
+    }
+
    if (i >= 0) {
      cur_file_ofs += i;
      break;
    }
+
+    /* Give up if we've searched the entire file, or we've gone back "too far"
+     * (~64kb) */
    if ((!cur_file_ofs) || ((pZip->m_archive_size - cur_file_ofs) >=
-                            (0xFFFF + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)))
+                            (MZ_UINT16_MAX + record_size)))
      return MZ_FALSE;
+
    cur_file_ofs = MZ_MAX(cur_file_ofs - (sizeof(buf_u32) - 3), 0);
  }
-  // Read and verify the end of central directory record.
+
+  *pOfs = cur_file_ofs;
+  return MZ_TRUE;
+}
+
+static mz_bool mz_zip_reader_read_central_dir(mz_zip_archive *pZip,
+                                              mz_uint flags) {
+  mz_uint cdir_size = 0, cdir_entries_on_this_disk = 0, num_this_disk = 0,
+          cdir_disk_index = 0;
+  mz_uint64 cdir_ofs = 0;
+  mz_int64 cur_file_ofs = 0;
+  const mz_uint8 *p;
+
+  mz_uint32 buf_u32[4096 / sizeof(mz_uint32)];
+  mz_uint8 *pBuf = (mz_uint8 *)buf_u32;
+  mz_bool sort_central_dir =
+      ((flags & MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY) == 0);
+  mz_uint32 zip64_end_of_central_dir_locator_u32
+      [(MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE + sizeof(mz_uint32) - 1) /
+       sizeof(mz_uint32)];
+  mz_uint8 *pZip64_locator = (mz_uint8 *)zip64_end_of_central_dir_locator_u32;
+
+  mz_uint32 zip64_end_of_central_dir_header_u32
+      [(MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) /
+       sizeof(mz_uint32)];
+  mz_uint8 *pZip64_end_of_central_dir =
+      (mz_uint8 *)zip64_end_of_central_dir_header_u32;
+
+  mz_uint64 zip64_end_of_central_dir_ofs = 0;
+
+  /* Basic sanity checks - reject files which are too small, and check the first
+   * 4 bytes of the file to make sure a local header is there. */
+  if (pZip->m_archive_size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)
+    return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE);
+
+  if (!mz_zip_reader_locate_header_sig(
+          pZip, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG,
+          MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE, &cur_file_ofs))
+    return mz_zip_set_error(pZip, MZ_ZIP_FAILED_FINDING_CENTRAL_DIR);
+
+  /* Read and verify the end of central directory record. */
  if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pBuf,
                    MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) !=
      MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)
-    return MZ_FALSE;
-  if ((MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_SIG_OFS) !=
-       MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG) ||
-      ((pZip->m_total_files =
-            MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_CDIR_TOTAL_ENTRIES_OFS)) !=
-       MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS)))
-    return MZ_FALSE;
+    return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);

+  if (MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_SIG_OFS) !=
+      MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG)
+    return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE);
+
+  if (cur_file_ofs >= (MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE +
+                       MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE)) {
+    if (pZip->m_pRead(pZip->m_pIO_opaque,
+                      cur_file_ofs - MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE,
+                      pZip64_locator,
+                      MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE) ==
+        MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE) {
+      if (MZ_READ_LE32(pZip64_locator + MZ_ZIP64_ECDL_SIG_OFS) ==
+          MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIG) {
+        zip64_end_of_central_dir_ofs = MZ_READ_LE64(
+            pZip64_locator + MZ_ZIP64_ECDL_REL_OFS_TO_ZIP64_ECDR_OFS);
+        if (zip64_end_of_central_dir_ofs >
+            (pZip->m_archive_size - MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE))
+          return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE);
+
+        if (pZip->m_pRead(pZip->m_pIO_opaque, zip64_end_of_central_dir_ofs,
+                          pZip64_end_of_central_dir,
+                          MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE) ==
+            MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE) {
+          if (MZ_READ_LE32(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_SIG_OFS) ==
+              MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIG) {
+            pZip->m_pState->m_zip64 = MZ_TRUE;
+          }
+        }
+      }
+    }
+  }
+
+  pZip->m_total_files = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_CDIR_TOTAL_ENTRIES_OFS);
+  cdir_entries_on_this_disk =
+      MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS);
  num_this_disk = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_NUM_THIS_DISK_OFS);
  cdir_disk_index = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_NUM_DISK_CDIR_OFS);
+  cdir_size = MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_CDIR_SIZE_OFS);
+  cdir_ofs = MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_CDIR_OFS_OFS);
+
+  if (pZip->m_pState->m_zip64) {
+    mz_uint32 zip64_total_num_of_disks =
+        MZ_READ_LE32(pZip64_locator + MZ_ZIP64_ECDL_TOTAL_NUMBER_OF_DISKS_OFS);
+    mz_uint64 zip64_cdir_total_entries = MZ_READ_LE64(
+        pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_TOTAL_ENTRIES_OFS);
+    mz_uint64 zip64_cdir_total_entries_on_this_disk = MZ_READ_LE64(
+        pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS);
+    mz_uint64 zip64_size_of_end_of_central_dir_record = MZ_READ_LE64(
+        pZip64_end_of_central_dir + MZ_ZIP64_ECDH_SIZE_OF_RECORD_OFS);
+    mz_uint64 zip64_size_of_central_directory =
+        MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_SIZE_OFS);
+
+    if (zip64_size_of_end_of_central_dir_record <
+        (MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE - 12))
+      return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
+
+    if (zip64_total_num_of_disks != 1U)
+      return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK);
+
+    /* Check for miniz's practical limits */
+    if (zip64_cdir_total_entries > MZ_UINT32_MAX)
+      return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);
+
+    pZip->m_total_files = (mz_uint32)zip64_cdir_total_entries;
+
+    if (zip64_cdir_total_entries_on_this_disk > MZ_UINT32_MAX)
+      return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);
+
+    cdir_entries_on_this_disk =
+        (mz_uint32)zip64_cdir_total_entries_on_this_disk;
+
+    /* Check for miniz's current practical limits (sorry, this should be enough
+     * for millions of files) */
+    if (zip64_size_of_central_directory > MZ_UINT32_MAX)
+      return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE);
+
+    cdir_size = (mz_uint32)zip64_size_of_central_directory;
+
+    num_this_disk = MZ_READ_LE32(pZip64_end_of_central_dir +
+                                 MZ_ZIP64_ECDH_NUM_THIS_DISK_OFS);
+
+    cdir_disk_index = MZ_READ_LE32(pZip64_end_of_central_dir +
+                                   MZ_ZIP64_ECDH_NUM_DISK_CDIR_OFS);
+
+    cdir_ofs =
+        MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_OFS_OFS);
+  }
+
+  if (pZip->m_total_files != cdir_entries_on_this_disk)
+    return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK);
+
  if (((num_this_disk | cdir_disk_index) != 0) &&
      ((num_this_disk != 1) || (cdir_disk_index != 1)))
-    return MZ_FALSE;
+    return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK);

-  if ((cdir_size = MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_CDIR_SIZE_OFS)) <
-      pZip->m_total_files * MZ_ZIP_CENTRAL_DIR_HEADER_SIZE)
-    return MZ_FALSE;
+  if (cdir_size < pZip->m_total_files * MZ_ZIP_CENTRAL_DIR_HEADER_SIZE)
+    return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

-  cdir_ofs = MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_CDIR_OFS_OFS);
  if ((cdir_ofs + (mz_uint64)cdir_size) > pZip->m_archive_size)
-    return MZ_FALSE;
+    return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

  pZip->m_central_directory_file_ofs = cdir_ofs;

  if (pZip->m_total_files) {
    mz_uint i, n;
-
-    // Read the entire central directory into a heap block, and allocate another
-    // heap block to hold the unsorted central dir file record offsets, and
-    // another to hold the sorted indices.
+    /* Read the entire central directory into a heap block, and allocate another
+     * heap block to hold the unsorted central dir file record offsets, and
+     * possibly another to hold the sorted indices. */
    if ((!mz_zip_array_resize(pZip, &pZip->m_pState->m_central_dir, cdir_size,
                              MZ_FALSE)) ||
        (!mz_zip_array_resize(pZip, &pZip->m_pState->m_central_dir_offsets,
                              pZip->m_total_files, MZ_FALSE)))
-      return MZ_FALSE;
+      return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

    if (sort_central_dir) {
      if (!mz_zip_array_resize(pZip,
                               &pZip->m_pState->m_sorted_central_dir_offsets,
                               pZip->m_total_files, MZ_FALSE))
-        return MZ_FALSE;
+        return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
    }

    if (pZip->m_pRead(pZip->m_pIO_opaque, cdir_ofs,
                      pZip->m_pState->m_central_dir.m_p,
                      cdir_size) != cdir_size)
-      return MZ_FALSE;
+      return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);

-    // Now create an index into the central directory file records, do some
-    // basic sanity checking on each record, and check for zip64 entries (which
-    // are not yet supported).
+    /* Now create an index into the central directory file records, do some
+     * basic sanity checking on each record */
    p = (const mz_uint8 *)pZip->m_pState->m_central_dir.m_p;
    for (n = cdir_size, i = 0; i < pZip->m_total_files; ++i) {
-      mz_uint total_header_size, comp_size, decomp_size, disk_index;
+      mz_uint total_header_size, disk_index, bit_flags, filename_size,
+          ext_data_size;
+      mz_uint64 comp_size, decomp_size, local_header_ofs;
+
      if ((n < MZ_ZIP_CENTRAL_DIR_HEADER_SIZE) ||
          (MZ_READ_LE32(p) != MZ_ZIP_CENTRAL_DIR_HEADER_SIG))
-        return MZ_FALSE;
+        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
+
      MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir_offsets, mz_uint32,
                           i) =
          (mz_uint32)(p - (const mz_uint8 *)pZip->m_pState->m_central_dir.m_p);
+
      if (sort_central_dir)
        MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_sorted_central_dir_offsets,
                             mz_uint32, i) = i;
+
      comp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS);
      decomp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS);
-      if (((!MZ_READ_LE32(p + MZ_ZIP_CDH_METHOD_OFS)) &&
-           (decomp_size != comp_size)) ||
-          (decomp_size && !comp_size) || (decomp_size == 0xFFFFFFFF) ||
-          (comp_size == 0xFFFFFFFF))
-        return MZ_FALSE;
+      local_header_ofs = MZ_READ_LE32(p + MZ_ZIP_CDH_LOCAL_HEADER_OFS);
+      filename_size = MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS);
+      ext_data_size = MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS);
+
+      if ((!pZip->m_pState->m_zip64_has_extended_info_fields) &&
+          (ext_data_size) &&
+          (MZ_MAX(MZ_MAX(comp_size, decomp_size), local_header_ofs) ==
+           MZ_UINT32_MAX)) {
+        /* Attempt to find zip64 extended information field in the entry's extra
+         * data */
+        mz_uint32 extra_size_remaining = ext_data_size;
+
+        if (extra_size_remaining) {
+          const mz_uint8 *pExtra_data;
+          void *buf = NULL;
+
+          if (MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_size + ext_data_size >
+              n) {
+            buf = MZ_MALLOC(ext_data_size);
+            if (buf == NULL)
+              return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
+
+            if (pZip->m_pRead(pZip->m_pIO_opaque,
+                              cdir_ofs + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE +
+                                  filename_size,
+                              buf, ext_data_size) != ext_data_size) {
+              MZ_FREE(buf);
+              return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
+            }
+
+            pExtra_data = (mz_uint8 *)buf;
+          } else {
+            pExtra_data = p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_size;
+          }
+
+          do {
+            mz_uint32 field_id;
+            mz_uint32 field_data_size;
+
+            if (extra_size_remaining < (sizeof(mz_uint16) * 2)) {
+              MZ_FREE(buf);
+              return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
+            }
+
+            field_id = MZ_READ_LE16(pExtra_data);
+            field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16));
+
+            if ((field_data_size + sizeof(mz_uint16) * 2) >
+                extra_size_remaining) {
+              MZ_FREE(buf);
+              return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
+            }
+
+            if (field_id == MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID) {
+              /* Ok, the archive didn't have any zip64 headers but it uses a
+               * zip64 extended information field so mark it as zip64 anyway
+               * (this can occur with infozip's zip util when it reads
+               * compresses files from stdin). */
+              pZip->m_pState->m_zip64 = MZ_TRUE;
+              pZip->m_pState->m_zip64_has_extended_info_fields = MZ_TRUE;
+              break;
+            }
+
+            pExtra_data += sizeof(mz_uint16) * 2 + field_data_size;
+            extra_size_remaining =
+                extra_size_remaining - sizeof(mz_uint16) * 2 - field_data_size;
+          } while (extra_size_remaining);
+
+          MZ_FREE(buf);
+        }
+      }
+
+      /* I've seen archives that aren't marked as zip64 that uses zip64 ext
+       * data, argh */
+      if ((comp_size != MZ_UINT32_MAX) && (decomp_size != MZ_UINT32_MAX)) {
+        if (((!MZ_READ_LE32(p + MZ_ZIP_CDH_METHOD_OFS)) &&
+             (decomp_size != comp_size)) ||
+            (decomp_size && !comp_size))
+          return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
+      }
+
      disk_index = MZ_READ_LE16(p + MZ_ZIP_CDH_DISK_START_OFS);
-      if ((disk_index != num_this_disk) && (disk_index != 1))
-        return MZ_FALSE;
-      if (((mz_uint64)MZ_READ_LE32(p + MZ_ZIP_CDH_LOCAL_HEADER_OFS) +
-           MZ_ZIP_LOCAL_DIR_HEADER_SIZE + comp_size) > pZip->m_archive_size)
-        return MZ_FALSE;
+      if ((disk_index == MZ_UINT16_MAX) ||
+          ((disk_index != num_this_disk) && (disk_index != 1)))
+        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK);
+
+      if (comp_size != MZ_UINT32_MAX) {
+        if (((mz_uint64)MZ_READ_LE32(p + MZ_ZIP_CDH_LOCAL_HEADER_OFS) +
+             MZ_ZIP_LOCAL_DIR_HEADER_SIZE + comp_size) > pZip->m_archive_size)
+          return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
+      }
+
+      bit_flags = MZ_READ_LE16(p + MZ_ZIP_CDH_BIT_FLAG_OFS);
+      if (bit_flags & MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_LOCAL_DIR_IS_MASKED)
+        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION);
+
      if ((total_header_size = MZ_ZIP_CENTRAL_DIR_HEADER_SIZE +
                               MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS) +
                               MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS) +
                               MZ_READ_LE16(p + MZ_ZIP_CDH_COMMENT_LEN_OFS)) >
          n)
-        return MZ_FALSE;
+        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
+
      n -= total_header_size;
      p += total_header_size;
    }
--- a/contrib/zip/src/zip.c
+++ b/contrib/zip/src/zip.c
@ -24,7 +24,6 @@
  ((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) &&   \
   (P)[1] == ':')
 #define FILESYSTEM_PREFIX_LEN(P) (HAS_DEVICE(P) ? 2 : 0)
-#define ISSLASH(C) ((C) == '/' || (C) == '\\')

 #else

@ -48,7 +47,7 @@ int symlink(const char *target, const char *linkpath); // needed on Linux
 #endif

 #ifndef ISSLASH
-#define ISSLASH(C) ((C) == '/')
+#define ISSLASH(C) ((C) == '/' || (C) == '\\')
 #endif

 #define CLEANUP(ptr)                                                           \
@ -78,26 +77,34 @@ static const char *base_name(const char *name) {
  return base;
 }

-static int mkpath(const char *path) {
-  char const *p;
+static int mkpath(char *path) {
+  char *p;
  char npath[MAX_PATH + 1];
  int len = 0;
  int has_device = HAS_DEVICE(path);

  memset(npath, 0, MAX_PATH + 1);
-
-#ifdef _WIN32
-  // only on windows fix the path
-  npath[0] = path[0];
-  npath[1] = path[1];
-  len = 2;
-#endif // _WIN32
-    
+  if (has_device) {
+    // only on windows
+    npath[0] = path[0];
+    npath[1] = path[1];
+    len = 2;
+  }
  for (p = path + len; *p && len < MAX_PATH; p++) {
    if (ISSLASH(*p) && ((!has_device && len > 0) || (has_device && len > 2))) {
-      if (MKDIR(npath) == -1)
-        if (errno != EEXIST)
+#if defined(_WIN32) || defined(__WIN32__) || defined(_MSC_VER) ||              \
+    defined(__MINGW32__)
+#else
+      if ('\\' == *p) {
+        *p = '/';
+      }
+#endif
+
+      if (MKDIR(npath) == -1) {
+        if (errno != EEXIST) {
          return -1;
+        }
+      }
    }
    npath[len++] = *p;
  }
@ -279,7 +286,14 @@ int zip_entry_open(struct zip_t *zip, const char *entryname) {
  zip->entry.header_offset = zip->archive.m_archive_size;
  memset(zip->entry.header, 0, MZ_ZIP_LOCAL_DIR_HEADER_SIZE * sizeof(mz_uint8));
  zip->entry.method = 0;
+
+  // UNIX or APPLE
+#if MZ_PLATFORM == 3 || MZ_PLATFORM == 19
+  // regular file with rw-r--r-- persmissions
+  zip->entry.external_attr = (mz_uint32)(0100644) << 16;
+#else
  zip->entry.external_attr = 0;
+#endif

  num_alignment_padding_bytes =
      mz_zip_writer_compute_padding_needed_for_file_alignment(pzip);
@ -660,7 +674,7 @@ ssize_t zip_entry_noallocread(struct zip_t *zip, void *buf, size_t bufsize) {
  }

  if (!mz_zip_reader_extract_to_mem_no_alloc(pzip, (mz_uint)zip->entry.index,
-  buf, bufsize, 0, NULL,  0)) {
+                                             buf, bufsize, 0, NULL, 0)) {
    return -1;
  }

@ -670,10 +684,7 @@ ssize_t zip_entry_noallocread(struct zip_t *zip, void *buf, size_t bufsize) {
 int zip_entry_fread(struct zip_t *zip, const char *filename) {
  mz_zip_archive *pzip = NULL;
  mz_uint idx;
-#if defined(_MSC_VER)
-#else
  mz_uint32 xattr = 0;
-#endif
  mz_zip_archive_file_stat info;

  if (!zip) {
@ -875,12 +886,19 @@ int zip_extract(const char *zipname, const char *dir,
      goto out;
    }

-    if ((((info.m_version_made_by >> 8) == 3) || ((info.m_version_made_by >> 8) == 19)) // if zip is produced on Unix or macOS (3 and 19 from section 4.4.2.2 of zip standard)
-        && info.m_external_attr & (0x20 << 24)) { // and has sym link attribute (0x80 is file, 0x40 is directory)
+    if ((((info.m_version_made_by >> 8) == 3) ||
+         ((info.m_version_made_by >> 8) ==
+          19)) // if zip is produced on Unix or macOS (3 and 19 from
+               // section 4.4.2.2 of zip standard)
+        && info.m_external_attr &
+               (0x20 << 24)) { // and has sym link attribute (0x80 is file, 0x40
+                               // is directory)
 #if defined(_WIN32) || defined(__WIN32__) || defined(_MSC_VER) ||              \
    defined(__MINGW32__)
 #else
-      if (info.m_uncomp_size > MAX_PATH || !mz_zip_reader_extract_to_mem_no_alloc(&zip_archive, i, symlink_to, MAX_PATH, 0, NULL, 0)) {
+      if (info.m_uncomp_size > MAX_PATH ||
+          !mz_zip_reader_extract_to_mem_no_alloc(&zip_archive, i, symlink_to,
+                                                 MAX_PATH, 0, NULL, 0)) {
        goto out;
      }
      symlink_to[info.m_uncomp_size] = '\0';
--- a/contrib/zip/src/zip.h
+++ b/contrib/zip/src/zip.h
@ -20,241 +20,240 @@ extern "C" {
 #endif

 #if !defined(_SSIZE_T_DEFINED) && !defined(_SSIZE_T_DEFINED_) &&               \
-    !defined(_SSIZE_T) && !defined(_SSIZE_T_) && !defined(__ssize_t_defined)
-#define _SSIZE_T
+    !defined(__DEFINED_ssize_t) && !defined(__ssize_t_defined) &&              \
+    !defined(_SSIZE_T) && !defined(_SSIZE_T_)
+
 // 64-bit Windows is the only mainstream platform
 // where sizeof(long) != sizeof(void*)
 #ifdef _WIN64
-typedef long long  ssize_t;  /* byte count or error */
+typedef long long ssize_t; /* byte count or error */
 #else
-typedef long  ssize_t;  /* byte count or error */
+typedef long ssize_t; /* byte count or error */
 #endif
+
+#define _SSIZE_T_DEFINED
+#define _SSIZE_T_DEFINED_
+#define __DEFINED_ssize_t
+#define __ssize_t_defined
+#define _SSIZE_T
+#define _SSIZE_T_
+
 #endif

 #ifndef MAX_PATH
 #define MAX_PATH 32767 /* # chars in a path name including NULL */
 #endif

+/**
+ * @mainpage
+ *
+ * Documenation for @ref zip.
+ */
+
+/**
+ * @addtogroup zip
+ * @{
+ */
+
+/**
+ * Default zip compression level.
+ */
+
 #define ZIP_DEFAULT_COMPRESSION_LEVEL 6

-/*
-  This data structure is used throughout the library to represent zip archive
-  - forward declaration.
-*/
+/**
+ * @struct zip_t
+ *
+ * This data structure is used throughout the library to represent zip archive -
+ * forward declaration.
+ */
 struct zip_t;

-/*
-  Opens zip archive with compression level using the given mode.
-
-  Args:
-    zipname: zip archive file name.
-    level: compression level (0-9 are the standard zlib-style levels).
-    mode: file access mode.
-        'r': opens a file for reading/extracting (the file must exists).
-        'w': creates an empty file for writing.
-        'a': appends to an existing archive.
-
-  Returns:
-    The zip archive handler or NULL on error
-*/
+/**
+ * Opens zip archive with compression level using the given mode.
+ *
+ * @param zipname zip archive file name.
+ * @param level compression level (0-9 are the standard zlib-style levels).
+ * @param mode file access mode.
+ *        - 'r': opens a file for reading/extracting (the file must exists).
+ *        - 'w': creates an empty file for writing.
+ *        - 'a': appends to an existing archive.
+ *
+ * @return the zip archive handler or NULL on error
+ */
 extern struct zip_t *zip_open(const char *zipname, int level, char mode);

-/*
-  Closes the zip archive, releases resources - always finalize.
-
-  Args:
-    zip: zip archive handler.
-*/
+/**
+ * Closes the zip archive, releases resources - always finalize.
+ *
+ * @param zip zip archive handler.
+ */
 extern void zip_close(struct zip_t *zip);

-/*
-  Opens an entry by name in the zip archive.
-  For zip archive opened in 'w' or 'a' mode the function will append
-  a new entry. In readonly mode the function tries to locate the entry
-  in global dictionary.
-
-  Args:
-    zip: zip archive handler.
-    entryname: an entry name in local dictionary.
-
-  Returns:
-    The return code - 0 on success, negative number (< 0) on error.
-*/
+/**
+ * Opens an entry by name in the zip archive.
+ *
+ * For zip archive opened in 'w' or 'a' mode the function will append
+ * a new entry. In readonly mode the function tries to locate the entry
+ * in global dictionary.
+ *
+ * @param zip zip archive handler.
+ * @param entryname an entry name in local dictionary.
+ *
+ * @return the return code - 0 on success, negative number (< 0) on error.
+ */
 extern int zip_entry_open(struct zip_t *zip, const char *entryname);

-/*
-  Opens a new entry by index in the zip archive.
-  This function is only valid if zip archive was opened in 'r' (readonly) mode.
-
-  Args:
-    zip: zip archive handler.
-    index: index in local dictionary.
-
-  Returns:
-    The return code - 0 on success, negative number (< 0) on error.
-*/
+/**
+ * Opens a new entry by index in the zip archive.
+ *
+ * This function is only valid if zip archive was opened in 'r' (readonly) mode.
+ *
+ * @param zip zip archive handler.
+ * @param index index in local dictionary.
+ *
+ * @return the return code - 0 on success, negative number (< 0) on error.
+ */
 extern int zip_entry_openbyindex(struct zip_t *zip, int index);

-/*
-  Closes a zip entry, flushes buffer and releases resources.
-
-  Args:
-    zip: zip archive handler.
-
-  Returns:
-    The return code - 0 on success, negative number (< 0) on error.
-*/
+/**
+ * Closes a zip entry, flushes buffer and releases resources.
+ *
+ * @param zip zip archive handler.
+ *
+ * @return the return code - 0 on success, negative number (< 0) on error.
+ */
 extern int zip_entry_close(struct zip_t *zip);

-/*
-  Returns a local name of the current zip entry.
-  The main difference between user's entry name and local entry name
-  is optional relative path.
-  Following .ZIP File Format Specification - the path stored MUST not contain
-  a drive or device letter, or a leading slash.
-  All slashes MUST be forward slashes '/' as opposed to backwards slashes '\'
-  for compatibility with Amiga and UNIX file systems etc.
-
-  Args:
-    zip: zip archive handler.
-
-  Returns:
-    The pointer to the current zip entry name, or NULL on error.
-*/
+/**
+ * Returns a local name of the current zip entry.
+ *
+ * The main difference between user's entry name and local entry name
+ * is optional relative path.
+ * Following .ZIP File Format Specification - the path stored MUST not contain
+ * a drive or device letter, or a leading slash.
+ * All slashes MUST be forward slashes '/' as opposed to backwards slashes '\'
+ * for compatibility with Amiga and UNIX file systems etc.
+ *
+ * @param zip: zip archive handler.
+ *
+ * @return the pointer to the current zip entry name, or NULL on error.
+ */
 extern const char *zip_entry_name(struct zip_t *zip);

-/*
-  Returns an index of the current zip entry.
-
-  Args:
-    zip: zip archive handler.
-
-  Returns:
-    The index on success, negative number (< 0) on error.
-*/
+/**
+ * Returns an index of the current zip entry.
+ *
+ * @param zip zip archive handler.
+ *
+ * @return the index on success, negative number (< 0) on error.
+ */
 extern int zip_entry_index(struct zip_t *zip);

-/*
-  Determines if the current zip entry is a directory entry.
-
-  Args:
-    zip: zip archive handler.
-
-  Returns:
-    The return code - 1 (true), 0 (false), negative number (< 0) on error.
-*/
+/**
+ * Determines if the current zip entry is a directory entry.
+ *
+ * @param zip zip archive handler.
+ *
+ * @return the return code - 1 (true), 0 (false), negative number (< 0) on
+ *         error.
+ */
 extern int zip_entry_isdir(struct zip_t *zip);

-/*
-  Returns an uncompressed size of the current zip entry.
-
-  Args:
-    zip: zip archive handler.
-
-  Returns:
-    The uncompressed size in bytes.
-*/
+/**
+ * Returns an uncompressed size of the current zip entry.
+ *
+ * @param zip zip archive handler.
+ *
+ * @return the uncompressed size in bytes.
+ */
 extern unsigned long long zip_entry_size(struct zip_t *zip);

-/*
-  Returns CRC-32 checksum of the current zip entry.
-
-  Args:
-    zip: zip archive handler.
-
-  Returns:
-    The CRC-32 checksum.
-*/
+/**
+ * Returns CRC-32 checksum of the current zip entry.
+ *
+ * @param zip zip archive handler.
+ *
+ * @return the CRC-32 checksum.
+ */
 extern unsigned int zip_entry_crc32(struct zip_t *zip);

-/*
-  Compresses an input buffer for the current zip entry.
-
-  Args:
-    zip: zip archive handler.
-    buf: input buffer.
-    bufsize: input buffer size (in bytes).
-
-  Returns:
-    The return code - 0 on success, negative number (< 0) on error.
-*/
+/**
+ * Compresses an input buffer for the current zip entry.
+ *
+ * @param zip zip archive handler.
+ * @param buf input buffer.
+ * @param bufsize input buffer size (in bytes).
+ *
+ * @return the return code - 0 on success, negative number (< 0) on error.
+ */
 extern int zip_entry_write(struct zip_t *zip, const void *buf, size_t bufsize);

-/*
-  Compresses a file for the current zip entry.
-
-  Args:
-    zip: zip archive handler.
-    filename: input file.
-
-  Returns:
-    The return code - 0 on success, negative number (< 0) on error.
-*/
+/**
+ * Compresses a file for the current zip entry.
+ *
+ * @param zip zip archive handler.
+ * @param filename input file.
+ *
+ * @return the return code - 0 on success, negative number (< 0) on error.
+ */
 extern int zip_entry_fwrite(struct zip_t *zip, const char *filename);

-/*
-  Extracts the current zip entry into output buffer.
-  The function allocates sufficient memory for a output buffer.
-
-  Args:
-    zip: zip archive handler.
-    buf: output buffer.
-    bufsize: output buffer size (in bytes).
-
-  Note:
-    - remember to release memory allocated for a output buffer.
-    - for large entries, please take a look at zip_entry_extract function.
-
-  Returns:
-    The return code - the number of bytes actually read on success.
-    Otherwise a -1 on error.
-*/
+/**
+ * Extracts the current zip entry into output buffer.
+ *
+ * The function allocates sufficient memory for a output buffer.
+ *
+ * @param zip zip archive handler.
+ * @param buf output buffer.
+ * @param bufsize output buffer size (in bytes).
+ *
+ * @note remember to release memory allocated for a output buffer.
+ *       for large entries, please take a look at zip_entry_extract function.
+ *
+ * @return the return code - the number of bytes actually read on success.
+ *         Otherwise a -1 on error.
+ */
 extern ssize_t zip_entry_read(struct zip_t *zip, void **buf, size_t *bufsize);

-/*
-  Extracts the current zip entry into a memory buffer using no memory
-  allocation.
+/**
+ * Extracts the current zip entry into a memory buffer using no memory
+ * allocation.
+ *
+ * @param zip zip archive handler.
+ * @param buf preallocated output buffer.
+ * @param bufsize output buffer size (in bytes).
+ *
+ * @note ensure supplied output buffer is large enough.
+ *       zip_entry_size function (returns uncompressed size for the current
+ *       entry) can be handy to estimate how big buffer is needed. for large
+ * entries, please take a look at zip_entry_extract function.
+ *
+ * @return the return code - the number of bytes actually read on success.
+ *         Otherwise a -1 on error (e.g. bufsize is not large enough).
+ */
+extern ssize_t zip_entry_noallocread(struct zip_t *zip, void *buf,
+                                     size_t bufsize);

-  Args:
-    zip: zip archive handler.
-    buf: preallocated output buffer.
-    bufsize: output buffer size (in bytes).
-
-  Note:
-    - ensure supplied output buffer is large enough.
-    - zip_entry_size function (returns uncompressed size for the current entry)
-      can be handy to estimate how big buffer is needed.
-    - for large entries, please take a look at zip_entry_extract function.
-
-  Returns:
-    The return code - the number of bytes actually read on success.
-    Otherwise a -1 on error (e.g. bufsize is not large enough).
-*/
-extern ssize_t zip_entry_noallocread(struct zip_t *zip, void *buf, size_t bufsize);
-
-/*
-  Extracts the current zip entry into output file.
-
-  Args:
-    zip: zip archive handler.
-    filename: output file.
-
-  Returns:
-    The return code - 0 on success, negative number (< 0) on error.
-*/
+/**
+ * Extracts the current zip entry into output file.
+ *
+ * @param zip zip archive handler.
+ * @param filename output file.
+ *
+ * @return the return code - 0 on success, negative number (< 0) on error.
+ */
 extern int zip_entry_fread(struct zip_t *zip, const char *filename);

-/*
-  Extracts the current zip entry using a callback function (on_extract).
-
-  Args:
-    zip: zip archive handler.
-    on_extract: callback function.
-    arg: opaque pointer (optional argument,
-                         which you can pass to the on_extract callback)
-
-   Returns:
-    The return code - 0 on success, negative number (< 0) on error.
+/**
+ * Extracts the current zip entry using a callback function (on_extract).
+ *
+ * @param zip zip archive handler.
+ * @param on_extract callback function.
+ * @param arg opaque pointer (optional argument, which you can pass to the
+ *        on_extract callback)
+ *
+ * @return the return code - 0 on success, negative number (< 0) on error.
 */
 extern int
 zip_entry_extract(struct zip_t *zip,
@ -262,53 +261,49 @@ zip_entry_extract(struct zip_t *zip,
                                       const void *data, size_t size),
                  void *arg);

-/*
-  Returns the number of all entries (files and directories) in the zip archive.
-
-  Args:
-    zip: zip archive handler.
-
-  Returns:
-    The return code - the number of entries on success,
-    negative number (< 0) on error.
-*/
+/**
+ * Returns the number of all entries (files and directories) in the zip archive.
+ *
+ * @param zip zip archive handler.
+ *
+ * @return the return code - the number of entries on success, negative number
+ *         (< 0) on error.
+ */
 extern int zip_total_entries(struct zip_t *zip);

-/*
-  Creates a new archive and puts files into a single zip archive.
-
-  Args:
-    zipname: zip archive file.
-    filenames: input files.
-    len: number of input files.
-
-  Returns:
-    The return code - 0 on success, negative number (< 0) on error.
-*/
+/**
+ * Creates a new archive and puts files into a single zip archive.
+ *
+ * @param zipname zip archive file.
+ * @param filenames input files.
+ * @param len: number of input files.
+ *
+ * @return the return code - 0 on success, negative number (< 0) on error.
+ */
 extern int zip_create(const char *zipname, const char *filenames[], size_t len);

-/*
-  Extracts a zip archive file into directory.
-
-  If on_extract_entry is not NULL, the callback will be called after
-  successfully extracted each zip entry.
-  Returning a negative value from the callback will cause abort and return an
-  error. The last argument (void *arg) is optional, which you can use to pass
-  data to the on_extract_entry callback.
-
-  Args:
-    zipname: zip archive file.
-    dir: output directory.
-    on_extract_entry: on extract callback.
-    arg: opaque pointer.
-
-  Returns:
-    The return code - 0 on success, negative number (< 0) on error.
-*/
+/**
+ * Extracts a zip archive file into directory.
+ *
+ * If on_extract_entry is not NULL, the callback will be called after
+ * successfully extracted each zip entry.
+ * Returning a negative value from the callback will cause abort and return an
+ * error. The last argument (void *arg) is optional, which you can use to pass
+ * data to the on_extract_entry callback.
+ *
+ * @param zipname zip archive file.
+ * @param dir output directory.
+ * @param on_extract_entry on extract callback.
+ * @param arg opaque pointer.
+ *
+ * @return the return code - 0 on success, negative number (< 0) on error.
+ */
 extern int zip_extract(const char *zipname, const char *dir,
                       int (*on_extract_entry)(const char *filename, void *arg),
                       void *arg);

+/** @} */
+
 #ifdef __cplusplus
 }
 #endif
--- a/contrib/zip/test/CMakeLists.txt
+++ b/contrib/zip/test/CMakeLists.txt
@ -1,19 +1,16 @@
 cmake_minimum_required(VERSION 2.8)

-if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_C_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_C_COMPILER_ID}" STREQUAL "AppleClang")
-  if(ENABLE_COVERAGE)
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g ")
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O0")
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs")
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ftest-coverage")
-    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --coverage")
-  endif()
-endif ()
-
 # test
-include_directories(../src)
-add_executable(test.exe test.c ../src/zip.c)
-add_executable(test_miniz.exe test_miniz.c)
+set(test_out test.out)
+set(test_miniz_out test_miniz.out)

-add_test(NAME test COMMAND test.exe)
-add_test(NAME test_miniz COMMAND test_miniz.exe)
+add_executable(${test_out} test.c)
+target_link_libraries(${test_out} zip)
+add_executable(${test_miniz_out} test_miniz.c)
+target_link_libraries(${test_miniz_out} zip)
+
+add_test(NAME ${test_out} COMMAND ${test_out})
+add_test(NAME ${test_miniz_out} COMMAND ${test_miniz_out})
+
+set(test_out ${test_out} PARENT_SCOPE)
+set(test_miniz_out ${test_miniz_out} PARENT_SCOPE)
--- a/contrib/zip/test/test.c
+++ b/contrib/zip/test/test.c
@ -29,6 +29,8 @@
 #define XFILE "7.txt\0"
 #define XMODE 0100777

+#define UNIXMODE 0100644
+
 #define UNUSED(x) (void)x

 static int total_entries = 0;
@ -102,6 +104,7 @@ static void test_read(void) {
  assert(0 == zip_entry_close(zip));
  free(buf);
  buf = NULL;
+  bufsize = 0;

  assert(0 == zip_entry_open(zip, "test/test-2.txt"));
  assert(strlen(TESTDATA2) == zip_entry_size(zip));
@ -131,6 +134,7 @@ static void test_read(void) {
  assert(0 == zip_entry_close(zip));
  free(buf);
  buf = NULL;
+  bufsize = 0;

  buftmp = strlen(TESTDATA1);
  buf = calloc(buftmp, sizeof(char));
@ -433,6 +437,35 @@ static void test_mtime(void) {
  remove(ZIPNAME);
 }

+static void test_unix_permissions(void) {
+#if defined(_WIN64) || defined(_WIN32) || defined(__WIN32__)
+#else
+  // UNIX or APPLE
+  struct MZ_FILE_STAT_STRUCT file_stats;
+
+  remove(ZIPNAME);
+
+  struct zip_t *zip = zip_open(ZIPNAME, ZIP_DEFAULT_COMPRESSION_LEVEL, 'w');
+  assert(zip != NULL);
+
+  assert(0 == zip_entry_open(zip, RFILE));
+  assert(0 == zip_entry_write(zip, TESTDATA1, strlen(TESTDATA1)));
+  assert(0 == zip_entry_close(zip));
+
+  zip_close(zip);
+
+  remove(RFILE);
+
+  assert(0 == zip_extract(ZIPNAME, ".", NULL, NULL));
+
+  assert(0 == MZ_FILE_STAT(RFILE, &file_stats));
+  assert(UNIXMODE == file_stats.st_mode);
+
+  remove(RFILE);
+  remove(ZIPNAME);
+#endif
+}
+
 int main(int argc, char *argv[]) {
  UNUSED(argc);
  UNUSED(argv);
@ -453,6 +486,7 @@ int main(int argc, char *argv[]) {
  test_write_permissions();
  test_exe_permissions();
  test_mtime();
+  test_unix_permissions();

  remove(ZIPNAME);
  return 0;
--- a/contrib/zip/test/test_miniz.c
+++ b/contrib/zip/test/test_miniz.c
@ -23,16 +23,39 @@ int main(int argc, char *argv[]) {
  uint step = 0;
  int cmp_status;
  uLong src_len = (uLong)strlen(s_pStr);
-  uLong cmp_len = compressBound(src_len);
  uLong uncomp_len = src_len;
+  uLong cmp_len;
  uint8 *pCmp, *pUncomp;
+  size_t sz;
  uint total_succeeded = 0;
  (void)argc, (void)argv;

  printf("miniz.c version: %s\n", MZ_VERSION);

  do {
+    pCmp = (uint8 *)tdefl_compress_mem_to_heap(s_pStr, src_len, &cmp_len, 0);
+    if (!pCmp) {
+      printf("tdefl_compress_mem_to_heap failed\n");
+      return EXIT_FAILURE;
+    }
+    if (src_len <= cmp_len) {
+      printf("tdefl_compress_mem_to_heap failed: from %u to %u bytes\n",
+             (mz_uint32)uncomp_len, (mz_uint32)cmp_len);
+      free(pCmp);
+      return EXIT_FAILURE;
+    }
+
+    sz = tdefl_compress_mem_to_mem(pCmp, cmp_len, s_pStr, src_len, 0);
+    if (sz != cmp_len) {
+      printf("tdefl_compress_mem_to_mem failed: expected %u, got %u\n",
+             (mz_uint32)cmp_len, (mz_uint32)sz);
+      free(pCmp);
+      return EXIT_FAILURE;
+    }
+
    // Allocate buffers to hold compressed and uncompressed data.
+    free(pCmp);
+    cmp_len = compressBound(src_len);
    pCmp = (mz_uint8 *)malloc((size_t)cmp_len);
    pUncomp = (mz_uint8 *)malloc((size_t)src_len);
    if ((!pCmp) || (!pUncomp)) {
--- a/include/assimp/version.h
+++ b/include/assimp/version.h
@ -62,6 +62,13 @@ extern "C" {
 */
 ASSIMP_API const char*  aiGetLegalString  (void);

+// ---------------------------------------------------------------------------
+/** @brief Returns the current patch version number of Assimp.
+ *  @return Patch version of the Assimp runtime the application was
+ *    linked/built against
+ */
+ASSIMP_API unsigned int aiGetVersionPatch(void);
+
 // ---------------------------------------------------------------------------
 /** @brief Returns the current minor version number of Assimp.
 *  @return Minor version of the Assimp runtime the application was
--- a/samples/SimpleTexturedDirectx11/CMakeLists.txt
+++ b/samples/SimpleTexturedDirectx11/CMakeLists.txt
@ -0,0 +1,46 @@
+FIND_PACKAGE(DirectX)
+
+IF ( MSVC )
+  SET(M_LIB)
+ENDIF ( MSVC )
+
+if ( MSVC )
+  ADD_DEFINITIONS( -D_SCL_SECURE_NO_WARNINGS )
+  ADD_DEFINITIONS( -D_CRT_SECURE_NO_WARNINGS )
+  REMOVE_DEFINITIONS( -DUNICODE -D_UNICODE )
+endif ( MSVC )
+
+INCLUDE_DIRECTORIES(
+  ${Assimp_SOURCE_DIR}/include
+  ${Assimp_SOURCE_DIR}/code
+  ${OPENGL_INCLUDE_DIR}
+  ${GLUT_INCLUDE_DIR}
+  ${Assimp_SOURCE_DIR}/samples/freeglut/include
+)
+
+LINK_DIRECTORIES(
+  ${Assimp_BINARY_DIR}
+  ${Assimp_BINARY_DIR}/lib
+)
+
+ADD_EXECUTABLE( assimp_simpletextureddirectx11 WIN32
+  SimpleTexturedDirectx11/Mesh.h 
+  SimpleTexturedDirectx11/ModelLoader.cpp
+  SimpleTexturedDirectx11/ModelLoader.h
+  #SimpleTexturedDirectx11/PixelShader.hlsl
+  SimpleTexturedDirectx11/TextureLoader.cpp
+  SimpleTexturedDirectx11/TextureLoader.h 
+  #SimpleTexturedDirectx11/VertexShader.hlsl  
+  SimpleTexturedDirectx11/main.cpp
+)
+
+SET_PROPERTY(TARGET assimp_simpletextureddirectx11 PROPERTY DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})
+
+TARGET_LINK_LIBRARIES( assimp_simpletextureddirectx11 assimp ${DirectX_LIBRARY} comctl32.lib winmm.lib )
+SET_TARGET_PROPERTIES( assimp_simpletextureddirectx11 PROPERTIES
+  OUTPUT_NAME assimp_simpletextureddirectx11
+)
+
+INSTALL( TARGETS assimp_simpletextureddirectx11
+  DESTINATION "${ASSIMP_BIN_INSTALL_DIR}" COMPONENT assimp-dev
+)
--- a/samples/SimpleTexturedDirectx11/SimpleTexturedDirectx11.sln
+++ b/samples/SimpleTexturedDirectx11/SimpleTexturedDirectx11.sln
@ -1,28 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.26228.9
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "SimpleTexturedDirectx11", "SimpleTexturedDirectx11\SimpleTexturedDirectx11.vcxproj", "{E3B160B5-E71F-4F3F-9310-B8F156F736D8}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|x64 = Debug|x64
-		Debug|x86 = Debug|x86
-		Release|x64 = Release|x64
-		Release|x86 = Release|x86
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{E3B160B5-E71F-4F3F-9310-B8F156F736D8}.Debug|x64.ActiveCfg = Debug|x64
-		{E3B160B5-E71F-4F3F-9310-B8F156F736D8}.Debug|x64.Build.0 = Debug|x64
-		{E3B160B5-E71F-4F3F-9310-B8F156F736D8}.Debug|x86.ActiveCfg = Debug|Win32
-		{E3B160B5-E71F-4F3F-9310-B8F156F736D8}.Debug|x86.Build.0 = Debug|Win32
-		{E3B160B5-E71F-4F3F-9310-B8F156F736D8}.Release|x64.ActiveCfg = Release|x64
-		{E3B160B5-E71F-4F3F-9310-B8F156F736D8}.Release|x64.Build.0 = Release|x64
-		{E3B160B5-E71F-4F3F-9310-B8F156F736D8}.Release|x86.ActiveCfg = Release|Win32
-		{E3B160B5-E71F-4F3F-9310-B8F156F736D8}.Release|x86.Build.0 = Release|Win32
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-EndGlobal
--- a/samples/SimpleTexturedDirectx11/SimpleTexturedDirectx11/ModelLoader.cpp
+++ b/samples/SimpleTexturedDirectx11/SimpleTexturedDirectx11/ModelLoader.cpp
@ -180,6 +180,8 @@ string ModelLoader::determineTextureType(const aiScene * scene, aiMaterial * mat
 	{
 		return "textures are on disk";
 	}
+
+    return ".";
 }

 int ModelLoader::getTextureIndex(aiString * str)
--- a/samples/SimpleTexturedDirectx11/SimpleTexturedDirectx11/SimpleTexturedDirectx11.vcxproj
+++ b/samples/SimpleTexturedDirectx11/SimpleTexturedDirectx11/SimpleTexturedDirectx11.vcxproj
@ -1,146 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup Label="ProjectConfigurations">
-    <ProjectConfiguration Include="Debug|Win32">
-      <Configuration>Debug</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
-      <Configuration>Release</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Debug|x64">
-      <Configuration>Debug</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|x64">
-      <Configuration>Release</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-  </ItemGroup>
-  <PropertyGroup Label="Globals">
-    <VCProjectVersion>15.0</VCProjectVersion>
-    <ProjectGuid>{E3B160B5-E71F-4F3F-9310-B8F156F736D8}</ProjectGuid>
-    <RootNamespace>SimpleTexturedDirectx11</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.14393.0</WindowsTargetPlatformVersion>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <CharacterSet>MultiByte</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>MultiByte</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <CharacterSet>MultiByte</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>MultiByte</CharacterSet>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
-  <ImportGroup Label="ExtensionSettings">
-  </ImportGroup>
-  <ImportGroup Label="Shared">
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <IncludePath>$(IncludePath);E:\OpenGL VS Files\include</IncludePath>
-    <LibraryPath>$(LibraryPath);E:\OpenGL VS Files\lib</LibraryPath>
-  </PropertyGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <SDLCheck>true</SDLCheck>
-    </ClCompile>
-    <Link>
-      <AdditionalDependencies>assimp-vc140-mt.lib;%(AdditionalDependencies)</AdditionalDependencies>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <SDLCheck>true</SDLCheck>
-    </ClCompile>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>MaxSpeed</Optimization>
-      <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <SDLCheck>true</SDLCheck>
-    </ClCompile>
-    <Link>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <OptimizeReferences>true</OptimizeReferences>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>MaxSpeed</Optimization>
-      <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <SDLCheck>true</SDLCheck>
-    </ClCompile>
-    <Link>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <OptimizeReferences>true</OptimizeReferences>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemGroup>
-    <ClCompile Include="main.cpp" />
-    <ClCompile Include="ModelLoader.cpp" />
-    <ClCompile Include="TextureLoader.cpp" />
-  </ItemGroup>
-  <ItemGroup>
-    <FxCompile Include="PixelShader.hlsl">
-      <ShaderType Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Pixel</ShaderType>
-      <ShaderType Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Pixel</ShaderType>
-      <ShaderType Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Pixel</ShaderType>
-      <ShaderType Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Pixel</ShaderType>
-    </FxCompile>
-    <FxCompile Include="VertexShader.hlsl">
-      <ShaderType Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Vertex</ShaderType>
-      <ShaderType Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Vertex</ShaderType>
-      <ShaderType Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Vertex</ShaderType>
-      <ShaderType Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Vertex</ShaderType>
-    </FxCompile>
-  </ItemGroup>
-  <ItemGroup>
-    <ClInclude Include="Mesh.h" />
-    <ClInclude Include="ModelLoader.h" />
-    <ClInclude Include="TextureLoader.h" />
-  </ItemGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
-  <ImportGroup Label="ExtensionTargets">
-  </ImportGroup>
-</Project>
--- a/samples/SimpleTexturedDirectx11/SimpleTexturedDirectx11/SimpleTexturedDirectx11.vcxproj.filters
+++ b/samples/SimpleTexturedDirectx11/SimpleTexturedDirectx11/SimpleTexturedDirectx11.vcxproj.filters
@ -1,50 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup>
-    <Filter Include="Source Files">
-      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
-      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
-    </Filter>
-    <Filter Include="Header Files">
-      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
-      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
-    </Filter>
-    <Filter Include="Resource Files">
-      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
-      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
-    </Filter>
-    <Filter Include="Shaders">
-      <UniqueIdentifier>{b6a86d3e-70a5-4d1e-ba05-c20902300206}</UniqueIdentifier>
-    </Filter>
-  </ItemGroup>
-  <ItemGroup>
-    <ClCompile Include="main.cpp">
-      <Filter>Source Files</Filter>
-    </ClCompile>
-    <ClCompile Include="ModelLoader.cpp">
-      <Filter>Source Files</Filter>
-    </ClCompile>
-    <ClCompile Include="TextureLoader.cpp">
-      <Filter>Source Files</Filter>
-    </ClCompile>
-  </ItemGroup>
-  <ItemGroup>
-    <FxCompile Include="VertexShader.hlsl">
-      <Filter>Shaders</Filter>
-    </FxCompile>
-    <FxCompile Include="PixelShader.hlsl">
-      <Filter>Shaders</Filter>
-    </FxCompile>
-  </ItemGroup>
-  <ItemGroup>
-    <ClInclude Include="ModelLoader.h">
-      <Filter>Header Files</Filter>
-    </ClInclude>
-    <ClInclude Include="Mesh.h">
-      <Filter>Header Files</Filter>
-    </ClInclude>
-    <ClInclude Include="TextureLoader.h">
-      <Filter>Header Files</Filter>
-    </ClInclude>
-  </ItemGroup>
-</Project>
--- a/test/models/glTF2/textureTransform/Arrow.png
+++ b/test/models/glTF2/textureTransform/Arrow.png
--- a/test/models/glTF2/textureTransform/Correct.png
+++ b/test/models/glTF2/textureTransform/Correct.png
--- a/test/models/glTF2/textureTransform/Error.png
+++ b/test/models/glTF2/textureTransform/Error.png
--- a/test/models/glTF2/textureTransform/License.txt
+++ b/test/models/glTF2/textureTransform/License.txt
--- a/test/models/glTF2/textureTransform/NotSupported.png
+++ b/test/models/glTF2/textureTransform/NotSupported.png
--- a/test/models/glTF2/textureTransform/TextureTransformTest.bin
+++ b/test/models/glTF2/textureTransform/TextureTransformTest.bin
--- a/test/models/glTF2/textureTransform/TextureTransformTest.gltf
+++ b/test/models/glTF2/textureTransform/TextureTransformTest.gltf
@ -0,0 +1,540 @@
+{
+  "accessors": [
+    {
+      "bufferView": 0,
+      "componentType": 5126,
+      "count": 4,
+      "type": "VEC3",
+      "max": [
+        0.5,
+        0.5,
+        0.0
+      ],
+      "min": [
+        -0.5,
+        -0.5,
+        0.0
+      ],
+      "name": "Positions"
+    },
+    {
+      "bufferView": 1,
+      "componentType": 5126,
+      "count": 4,
+      "type": "VEC2",
+      "name": "UV0"
+    },
+    {
+      "bufferView": 2,
+      "componentType": 5126,
+      "count": 4,
+      "type": "VEC2",
+      "name": "UV1"
+    },
+    {
+      "bufferView": 3,
+      "componentType": 5125,
+      "count": 6,
+      "type": "SCALAR",
+      "name": "Indices"
+    }
+  ],
+  "asset": {
+    "version": "2.0"
+  },
+  "buffers": [
+    {
+      "uri": "TextureTransformTest.bin",
+      "byteLength": 136
+    }
+  ],
+  "bufferViews": [
+    {
+      "buffer": 0,
+      "byteLength": 48,
+      "name": "Positions"
+    },
+    {
+      "buffer": 0,
+      "byteOffset": 48,
+      "byteLength": 32,
+      "name": "UV0"
+    },
+    {
+      "buffer": 0,
+      "byteOffset": 80,
+      "byteLength": 32,
+      "name": "UV1"
+    },
+    {
+      "buffer": 0,
+      "byteOffset": 112,
+      "byteLength": 24,
+      "name": "Indices"
+    }
+  ],
+  "extensionsUsed": [
+    "KHR_texture_transform"
+  ],
+  "images": [
+    {
+      "uri": "UV.png"
+    },
+    {
+      "uri": "Arrow.png"
+    },
+    {
+      "uri": "Correct.png"
+    },
+    {
+      "uri": "NotSupported.png"
+    },
+    {
+      "uri": "Error.png"
+    }
+  ],
+  "materials": [
+    {
+      "name": "Offset U",
+      "pbrMetallicRoughness": {
+        "baseColorTexture": {
+          "index": 0,
+          "extensions": {
+            "KHR_texture_transform": {
+              "offset": [
+                0.5,
+                0.0
+              ]
+            }
+          }
+        },
+        "metallicFactor": 0
+      }
+    },
+    {
+      "name": "Offset V",
+      "pbrMetallicRoughness": {
+        "baseColorTexture": {
+          "index": 0,
+          "extensions": {
+            "KHR_texture_transform": {
+              "offset": [
+                0.0,
+                0.5
+              ]
+            }
+          }
+        },
+        "metallicFactor": 0
+      }
+    },
+    {
+      "name": "Offset UV",
+      "pbrMetallicRoughness": {
+        "baseColorTexture": {
+          "index": 0,
+          "extensions": {
+            "KHR_texture_transform": {
+              "offset": [
+                0.5,
+                0.5
+              ]
+            }
+          }
+        },
+        "metallicFactor": 0
+      }
+    },
+    {
+      "name": "Rotation",
+      "pbrMetallicRoughness": {
+        "baseColorTexture": {
+          "index": 1,
+          "extensions": {
+            "KHR_texture_transform": {
+              "rotation": 0.39269908169872415480783042290994
+            }
+          }
+        },
+        "metallicFactor": 0
+      }
+    },
+    {
+      "name": "Scale",
+      "pbrMetallicRoughness": {
+        "baseColorTexture": {
+          "index": 1,
+          "extensions": {
+            "KHR_texture_transform": {
+              "scale": [
+                1.5,
+                1.5
+              ]
+            }
+          }
+        },
+        "metallicFactor": 0
+      }
+    },
+    {
+      "name": "All",
+      "pbrMetallicRoughness": {
+        "baseColorTexture": {
+          "index": 1,
+          "extensions": {
+            "KHR_texture_transform": {
+              "offset": [
+                -0.2,
+                -0.1
+              ],
+              "rotation": 0.3,
+              "scale": [
+                1.5,
+                1.5
+              ]
+            }
+          }
+        },
+        "metallicFactor": 0
+      }
+    },
+    {
+      "name": "Correct",
+      "pbrMetallicRoughness": {
+        "baseColorTexture": {
+          "index": 2
+        },
+        "metallicFactor": 0
+      }
+    },
+    {
+      "name": "NotSupported",
+      "pbrMetallicRoughness": {
+        "baseColorTexture": {
+          "index": 3
+        },
+        "metallicFactor": 0
+      }
+    },
+    {
+      "name": "Error",
+      "pbrMetallicRoughness": {
+        "baseColorTexture": {
+          "index": 4
+        },
+        "metallicFactor": 0
+      }
+    }
+  ],
+  "meshes": [
+    {
+      "name": "Offset U",
+      "primitives": [
+        {
+          "attributes": {
+            "POSITION": 0,
+            "TEXCOORD_0": 2
+          },
+          "indices": 3,
+          "material": 0
+        }
+      ]
+    },
+    {
+      "name": "Offset V",
+      "primitives": [
+        {
+          "attributes": {
+            "POSITION": 0,
+            "TEXCOORD_0": 2
+          },
+          "indices": 3,
+          "material": 1
+        }
+      ]
+    },
+    {
+      "name": "Offset UV",
+      "primitives": [
+        {
+          "attributes": {
+            "POSITION": 0,
+            "TEXCOORD_0": 2
+          },
+          "indices": 3,
+          "material": 2
+        }
+      ]
+    },
+    {
+      "name": "Rotation",
+      "primitives": [
+        {
+          "attributes": {
+            "POSITION": 0,
+            "TEXCOORD_0": 1
+          },
+          "indices": 3,
+          "material": 3
+        }
+      ]
+    },
+    {
+      "name": "Scale",
+      "primitives": [
+        {
+          "attributes": {
+            "POSITION": 0,
+            "TEXCOORD_0": 1
+          },
+          "indices": 3,
+          "material": 4
+        }
+      ]
+    },
+    {
+      "name": "All",
+      "primitives": [
+        {
+          "attributes": {
+            "POSITION": 0,
+            "TEXCOORD_0": 1
+          },
+          "indices": 3,
+          "material": 5
+        }
+      ]
+    },
+    {
+      "name": "Correct Marker",
+      "primitives": [
+        {
+          "attributes": {
+            "POSITION": 0,
+            "TEXCOORD_0": 1
+          },
+          "indices": 3,
+          "material": 6
+        }
+      ]
+    },
+    {
+      "name": "Not Supported Marker",
+      "primitives": [
+        {
+          "attributes": {
+            "POSITION": 0,
+            "TEXCOORD_0": 1
+          },
+          "indices": 3,
+          "material": 7
+        }
+      ]
+    },
+    {
+      "name": "Error Marker",
+      "primitives": [
+        {
+          "attributes": {
+            "POSITION": 0,
+            "TEXCOORD_0": 1
+          },
+          "indices": 3,
+          "material": 8
+        }
+      ]
+    }
+  ],
+  "nodes": [
+    {
+      "name": "Offset U",
+      "mesh": 0,
+      "translation": [
+        -1.1,
+        0.55,
+        0
+      ]
+    },
+    {
+      "name": "Offset V",
+      "mesh": 1,
+      "translation": [
+        0,
+        0.55,
+        0
+      ]
+    },
+    {
+      "name": "Offset UV",
+      "mesh": 2,
+      "translation": [
+        1.1,
+        0.55,
+        0
+      ]
+    },
+    {
+      "name": "Rotation",
+      "mesh": 3,
+      "translation": [
+        -1.1,
+        -0.55,
+        0
+      ],
+      "children": [
+        4,
+        5,
+        6
+      ]
+    },
+    {
+      "name": "Rotation - Correct",
+      "mesh": 6,
+      "translation": [
+        -0.07904822439840125109869401756656,
+        -0.51626748576241543174100150833647,
+        0.01
+      ],
+      "scale": [
+        0.15,
+        0.15,
+        0.15
+      ]
+    },
+    {
+      "name": "Rotation - Not Supported",
+      "mesh": 7,
+      "translation": [
+        0.27781745930520227684092879831533,
+        -0.27781745930520227684092879831533,
+        0.01
+      ],
+      "scale": [
+        0.15,
+        0.15,
+        0.15
+      ]
+    },
+    {
+      "name": "Rotation - Error",
+      "mesh": 8,
+      "translation": [
+        0.51626748576241543174100150833647,
+        0.07904822439840125109869401756656,
+        0.01
+      ],
+      "scale": [
+        0.15,
+        0.15,
+        0.15
+      ]
+    },
+    {
+      "name": "Scale",
+      "mesh": 4,
+      "translation": [
+        0,
+        -0.55,
+        0
+      ],
+      "children": [
+        8,
+        9
+      ]
+    },
+    {
+      "name": "Scale - Correct",
+      "mesh": 6,
+      "translation": [
+        0.01854497287013485122728586554355,
+        -0.01854497287013485122728586554355,
+        0.01
+      ],
+      "scale": [
+        0.1,
+        0.1,
+        0.1
+      ]
+    },
+    {
+      "name": "Scale - Not Supported",
+      "mesh": 7,
+      "translation": [
+        0.27781745930520227684092879831533,
+        -0.27781745930520227684092879831533,
+        0.01
+      ],
+      "scale": [
+        0.15,
+        0.15,
+        0.15
+      ]
+    },
+    {
+      "name": "All",
+      "mesh": 5,
+      "translation": [
+        1.1,
+        -0.55,
+        0
+      ],
+      "children": [
+        11
+      ]
+    },
+    {
+      "name": "All - Correct",
+      "mesh": 6,
+      "translation": [
+        -0.07,
+        -0.25,
+        0.01
+      ],
+      "scale": [
+        0.1,
+        0.1,
+        0.1
+      ]
+    }
+  ],
+  "scene": 0,
+  "scenes": [
+    {
+      "nodes": [
+        0,
+        1,
+        2,
+        3,
+        7,
+        10
+      ]
+    }
+  ],
+  "textures": [
+    {
+      "source": 0,
+      "sampler": 0
+    },
+    {
+      "source": 1,
+      "sampler": 0
+    },
+    {
+      "source": 2
+    },
+    {
+      "source": 3
+    },
+    {
+      "source": 4
+    }
+  ],
+  "samplers": [
+    {
+      "wrapS": 33071,
+      "wrapT": 33071,
+      "magFilter": 9729,
+      "minFilter": 9729
+    }
+  ]
+}
--- a/test/models/glTF2/textureTransform/UV.png
+++ b/test/models/glTF2/textureTransform/UV.png
--- a/test/unit/utM3DImportExport.cpp
+++ b/test/unit/utM3DImportExport.cpp
@ -54,7 +54,7 @@ class utM3DImportExport : public AbstractImportExportBase {
 public:
    virtual bool importerTest() {
        Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/M3D/WusonBlitz0.m3d", aiProcess_ValidateDataStructure );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/M3D/cube_normals.m3d", aiProcess_ValidateDataStructure );
 #ifndef ASSIMP_BUILD_NO_M3D_IMPORTER
        return nullptr != scene;
 #else
--- a/test/unit/utglTF2ImportExport.cpp
+++ b/test/unit/utglTF2ImportExport.cpp
@ -405,6 +405,13 @@ TEST_F(utglTF2ImportExport, incorrect_vertex_arrays) {
    EXPECT_EQ(scene->mMeshes[7]->mNumFaces, 17u);
 }

+TEST_F( utglTF2ImportExport, texture_transform_test ) {
+	Assimp::Importer importer;
+	const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/textureTransform/TextureTransformTest.gltf",
+			aiProcess_ValidateDataStructure);
+	EXPECT_NE(nullptr, scene);
+}
+
 #ifndef ASSIMP_BUILD_NO_EXPORT
 TEST_F( utglTF2ImportExport, exportglTF2FromFileTest ) {
    EXPECT_TRUE( exporterTest() );