bool Mesh::loadMesh( const char * objectFilename )
{
Assimp::Importer importer;
unsigned int index, vertexNum;
//read from file
const aiScene* pScene = importer.ReadFile( objectFilename, aiProcess_Triangulate );
// if scene is not good
if( !pScene )
{
// print erorr
printf("Error parsing '%s'\n", objectFilename);
return false;
}
// create aiMesh
aiMesh* mesh = pScene -> mMeshes[0];
// loop through each face
for( index = 0; index < mesh-> mNumFaces; index++ )
{
// create aiFace
const aiFace& face = mesh -> mFaces[index];
// loop through each face in each vertex
for( vertexNum = 0; vertexNum < 3; vertexNum++ )
{
aiVector3D tempPos = mesh -> mVertices[face.mIndices[vertexNum]];
Vertex tempVertex;
// save x y and z for each vertex
tempVertex.position[0] = tempPos.x;
tempVertex.position[1] = tempPos.y;
tempVertex.position[2] = tempPos.z;
// if has texture, save uv values
if( mesh->HasTextureCoords(0) )
{
aiVector3D tempTex = mesh -> mTextureCoords[0][face.mIndices[vertexNum]];
tempVertex.uv[0] = tempTex.x;
tempVertex.uv[1] = tempTex.y;
}
// if no texture, save 0 for uv values
else
{
aiVector3D tempTex(0.0f, 0.0f, 0.0f);
tempVertex.uv[0] = tempTex.x;
tempVertex.uv[1] = tempTex.y;
}
// push vertex to geometry
geometry.push_back(tempVertex);
}
}
// return success
return true;
}
void GrConfigConversionEffect::TestForPreservingPMConversions(GrContext* context,
PMConversion* pmToUPMRule,
PMConversion* upmToPMRule) {
*pmToUPMRule = kNone_PMConversion;
*upmToPMRule = kNone_PMConversion;
SkAutoTMalloc<uint32_t> data(256 * 256 * 3);
uint32_t* srcData = data.get();
uint32_t* firstRead = data.get() + 256 * 256;
uint32_t* secondRead = data.get() + 2 * 256 * 256;
// Fill with every possible premultiplied A, color channel value. There will be 256-y duplicate
// values in row y. We set r,g, and b to the same value since they are handled identically.
for (int y = 0; y < 256; ++y) {
for (int x = 0; x < 256; ++x) {
uint8_t* color = reinterpret_cast<uint8_t*>(&srcData[256*y + x]);
color[3] = y;
color[2] = SkTMin(x, y);
color[1] = SkTMin(x, y);
color[0] = SkTMin(x, y);
}
}
GrSurfaceDesc desc;
desc.fFlags = kRenderTarget_GrSurfaceFlag;
desc.fWidth = 256;
desc.fHeight = 256;
desc.fConfig = kRGBA_8888_GrPixelConfig;
SkAutoTUnref<GrTexture> readTex(context->textureProvider()->createTexture(desc, true, nullptr, 0));
if (!readTex.get()) {
return;
}
SkAutoTUnref<GrTexture> tempTex(context->textureProvider()->createTexture(desc, true, nullptr, 0));
if (!tempTex.get()) {
return;
}
desc.fFlags = kNone_GrSurfaceFlags;
SkAutoTUnref<GrTexture> dataTex(context->textureProvider()->createTexture(desc, true, data, 0));
if (!dataTex.get()) {
return;
}
static const PMConversion kConversionRules[][2] = {
{kDivByAlpha_RoundDown_PMConversion, kMulByAlpha_RoundUp_PMConversion},
{kDivByAlpha_RoundUp_PMConversion, kMulByAlpha_RoundDown_PMConversion},
};
bool failed = true;
for (size_t i = 0; i < SK_ARRAY_COUNT(kConversionRules) && failed; ++i) {
*pmToUPMRule = kConversionRules[i][0];
*upmToPMRule = kConversionRules[i][1];
static const SkRect kDstRect = SkRect::MakeWH(SkIntToScalar(256), SkIntToScalar(256));
static const SkRect kSrcRect = SkRect::MakeWH(SK_Scalar1, SK_Scalar1);
// We do a PM->UPM draw from dataTex to readTex and read the data. Then we do a UPM->PM draw
// from readTex to tempTex followed by a PM->UPM draw to readTex and finally read the data.
// We then verify that two reads produced the same values.
GrPaint paint1;
GrPaint paint2;
GrPaint paint3;
SkAutoTUnref<GrFragmentProcessor> pmToUPM1(new GrConfigConversionEffect(
paint1.getProcessorDataManager(), dataTex, false, *pmToUPMRule, SkMatrix::I()));
SkAutoTUnref<GrFragmentProcessor> upmToPM(new GrConfigConversionEffect(
paint2.getProcessorDataManager(), readTex, false, *upmToPMRule, SkMatrix::I()));
SkAutoTUnref<GrFragmentProcessor> pmToUPM2(new GrConfigConversionEffect(
paint3.getProcessorDataManager(), tempTex, false, *pmToUPMRule, SkMatrix::I()));
paint1.addColorFragmentProcessor(pmToUPM1);
SkAutoTUnref<GrDrawContext> readDrawContext(context->drawContext());
if (!readDrawContext) {
failed = true;
break;
}
readDrawContext->drawNonAARectToRect(readTex->asRenderTarget(),
GrClip::WideOpen(),
paint1,
SkMatrix::I(),
kDstRect,
kSrcRect);
readTex->readPixels(0, 0, 256, 256, kRGBA_8888_GrPixelConfig, firstRead);
paint2.addColorFragmentProcessor(upmToPM);
SkAutoTUnref<GrDrawContext> tempDrawContext(context->drawContext());
if (!tempDrawContext) {
failed = true;
break;
}
tempDrawContext->drawNonAARectToRect(tempTex->asRenderTarget(),
GrClip::WideOpen(),
paint2,
SkMatrix::I(),
kDstRect,
kSrcRect);
paint3.addColorFragmentProcessor(pmToUPM2);
readDrawContext.reset(context->drawContext());
if (!readDrawContext) {
failed = true;
break;
}
readDrawContext->drawNonAARectToRect(readTex->asRenderTarget(),
GrClip::WideOpen(),
paint3,
SkMatrix::I(),
kDstRect,
kSrcRect);
readTex->readPixels(0, 0, 256, 256, kRGBA_8888_GrPixelConfig, secondRead);
failed = false;
for (int y = 0; y < 256 && !failed; ++y) {
for (int x = 0; x <= y; ++x) {
if (firstRead[256 * y + x] != secondRead[256 * y + x]) {
failed = true;
break;
}
}
}
}
if (failed) {
*pmToUPMRule = kNone_PMConversion;
*upmToPMRule = kNone_PMConversion;
}
}
