GrGLvoid* GR_GL_FUNCTION_TYPE nullGLMapBuffer(GrGLenum target, GrGLenum access) {
// We just reserve 32MB of RAM for all locks and hope its big enough
static SkAutoMalloc gBufferData(32 * (1 << 20));
GrGLuint buf = 0;
switch (target) {
case GR_GL_ARRAY_BUFFER:
buf = gCurrArrayBuffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
buf = gCurrElementArrayBuffer;
break;
}
if (buf) {
*gMappedBuffers.append() = buf;
}
return gBufferData.get();
}
SkImageDecoder::Result SkBMPImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
// First read the entire stream, so that all of the data can be passed to
// the BmpDecoderHelper.
// Allocated space used to hold the data.
SkAutoMalloc storage;
// Byte length of all of the data.
const size_t length = SkCopyStreamToStorage(&storage, stream);
if (0 == length) {
return kFailure;
}
const bool justBounds = SkImageDecoder::kDecodeBounds_Mode == mode;
SkBmpDecoderCallback callback(justBounds);
// Now decode the BMP into callback's rgb() array [r,g,b, r,g,b, ...]
{
image_codec::BmpDecoderHelper helper;
const int max_pixels = 16383*16383; // max width*height
if (!helper.DecodeImage((const char*)storage.get(), length,
max_pixels, &callback)) {
return kFailure;
}
}
// we don't need this anymore, so free it now (before we try to allocate
// the bitmap's pixels) rather than waiting for its destructor
storage.free();
int width = callback.width();
int height = callback.height();
SkColorType colorType = this->getPrefColorType(k32Bit_SrcDepth, false);
// only accept prefConfig if it makes sense for us
if (kARGB_4444_SkColorType != colorType && kRGB_565_SkColorType != colorType) {
colorType = kN32_SkColorType;
}
SkScaledBitmapSampler sampler(width, height, getSampleSize());
bm->setInfo(SkImageInfo::Make(sampler.scaledWidth(), sampler.scaledHeight(),
colorType, kOpaque_SkAlphaType));
if (justBounds) {
return kSuccess;
}
if (!this->allocPixelRef(bm, NULL)) {
return kFailure;
}
SkAutoLockPixels alp(*bm);
if (!sampler.begin(bm, SkScaledBitmapSampler::kRGB, *this)) {
return kFailure;
}
const int srcRowBytes = width * 3;
const int dstHeight = sampler.scaledHeight();
const uint8_t* srcRow = callback.rgb();
srcRow += sampler.srcY0() * srcRowBytes;
for (int y = 0; y < dstHeight; y++) {
sampler.next(srcRow);
srcRow += sampler.srcDY() * srcRowBytes;
}
return kSuccess;
}
void SkScalerContext::getImage(const SkGlyph& origGlyph) {
const SkGlyph* glyph = &origGlyph;
SkGlyph tmpGlyph;
// in case we need to call generateImage on a mask-format that is different
// (i.e. larger) than what our caller allocated by looking at origGlyph.
SkAutoMalloc tmpGlyphImageStorage;
// If we are going to draw-from-path, then we cannot generate color, since
// the path only makes a mask. This case should have been caught up in
// generateMetrics().
SkASSERT(!fGenerateImageFromPath ||
SkMask::kARGB32_Format != origGlyph.fMaskFormat);
if (fMaskFilter) { // restore the prefilter bounds
tmpGlyph.initGlyphIdFrom(origGlyph);
// need the original bounds, sans our maskfilter
SkMaskFilter* mf = fMaskFilter;
fMaskFilter = nullptr; // temp disable
this->getMetrics(&tmpGlyph);
fMaskFilter = mf; // restore
// we need the prefilter bounds to be <= filter bounds
SkASSERT(tmpGlyph.fWidth <= origGlyph.fWidth);
SkASSERT(tmpGlyph.fHeight <= origGlyph.fHeight);
if (tmpGlyph.fMaskFormat == origGlyph.fMaskFormat) {
tmpGlyph.fImage = origGlyph.fImage;
} else {
tmpGlyphImageStorage.reset(tmpGlyph.computeImageSize());
tmpGlyph.fImage = tmpGlyphImageStorage.get();
}
glyph = &tmpGlyph;
}
if (fGenerateImageFromPath) {
SkPath devPath, fillPath;
SkMatrix fillToDevMatrix;
SkMask mask;
this->internalGetPath(*glyph, &fillPath, &devPath, &fillToDevMatrix);
glyph->toMask(&mask);
if (fRasterizer) {
mask.fFormat = SkMask::kA8_Format;
sk_bzero(glyph->fImage, mask.computeImageSize());
if (!fRasterizer->rasterize(fillPath, fillToDevMatrix, nullptr,
fMaskFilter, &mask,
SkMask::kJustRenderImage_CreateMode)) {
return;
}
if (fPreBlend.isApplicable()) {
applyLUTToA8Mask(mask, fPreBlend.fG);
}
} else {
SkASSERT(SkMask::kARGB32_Format != mask.fFormat);
generateMask(mask, devPath, fPreBlend);
}
} else {
generateImage(*glyph);
}
if (fMaskFilter) {
SkMask srcM, dstM;
SkMatrix matrix;
// the src glyph image shouldn't be 3D
SkASSERT(SkMask::k3D_Format != glyph->fMaskFormat);
SkAutoSMalloc<32*32> a8storage;
glyph->toMask(&srcM);
if (SkMask::kARGB32_Format == srcM.fFormat) {
// now we need to extract the alpha-channel from the glyph's image
// and copy it into a temp buffer, and then point srcM at that temp.
srcM.fFormat = SkMask::kA8_Format;
srcM.fRowBytes = SkAlign4(srcM.fBounds.width());
size_t size = srcM.computeImageSize();
a8storage.reset(size);
srcM.fImage = (uint8_t*)a8storage.get();
extract_alpha(srcM,
(const SkPMColor*)glyph->fImage, glyph->rowBytes());
}
fRec.getMatrixFrom2x2(&matrix);
if (fMaskFilter->filterMask(&dstM, srcM, matrix, nullptr)) {
int width = SkFastMin32(origGlyph.fWidth, dstM.fBounds.width());
int height = SkFastMin32(origGlyph.fHeight, dstM.fBounds.height());
int dstRB = origGlyph.rowBytes();
int srcRB = dstM.fRowBytes;
const uint8_t* src = (const uint8_t*)dstM.fImage;
uint8_t* dst = (uint8_t*)origGlyph.fImage;
if (SkMask::k3D_Format == dstM.fFormat) {
// we have to copy 3 times as much
height *= 3;
}
// clean out our glyph, since it may be larger than dstM
//sk_bzero(dst, height * dstRB);
while (--height >= 0) {
memcpy(dst, src, width);
src += srcRB;
dst += dstRB;
}
SkMask::FreeImage(dstM.fImage);
if (fPreBlendForFilter.isApplicable()) {
applyLUTToA8Mask(srcM, fPreBlendForFilter.fG);
}
}
}
}
static GrTexture* load_yuv_texture(GrContext* ctx, const GrUniqueKey& optionalKey,
const SkBitmap& bm, const GrSurfaceDesc& desc) {
// Subsets are not supported, the whole pixelRef is loaded when using YUV decoding
SkPixelRef* pixelRef = bm.pixelRef();
if ((NULL == pixelRef) ||
(pixelRef->info().width() != bm.info().width()) ||
(pixelRef->info().height() != bm.info().height())) {
return NULL;
}
const bool useCache = optionalKey.isValid();
SkYUVPlanesCache::Info yuvInfo;
SkAutoTUnref<SkCachedData> cachedData;
SkAutoMalloc storage;
if (useCache) {
cachedData.reset(SkYUVPlanesCache::FindAndRef(pixelRef->getGenerationID(), &yuvInfo));
}
void* planes[3];
if (cachedData.get()) {
planes[0] = (void*)cachedData->data();
planes[1] = (uint8_t*)planes[0] + yuvInfo.fSizeInMemory[0];
planes[2] = (uint8_t*)planes[1] + yuvInfo.fSizeInMemory[1];
} else {
// Fetch yuv plane sizes for memory allocation. Here, width and height can be
// rounded up to JPEG block size and be larger than the image's width and height.
if (!pixelRef->getYUV8Planes(yuvInfo.fSize, NULL, NULL, NULL)) {
return NULL;
}
// Allocate the memory for YUV
size_t totalSize(0);
for (int i = 0; i < 3; ++i) {
yuvInfo.fRowBytes[i] = yuvInfo.fSize[i].fWidth;
yuvInfo.fSizeInMemory[i] = yuvInfo.fRowBytes[i] * yuvInfo.fSize[i].fHeight;
totalSize += yuvInfo.fSizeInMemory[i];
}
if (useCache) {
cachedData.reset(SkResourceCache::NewCachedData(totalSize));
planes[0] = cachedData->writable_data();
} else {
storage.reset(totalSize);
planes[0] = storage.get();
}
planes[1] = (uint8_t*)planes[0] + yuvInfo.fSizeInMemory[0];
planes[2] = (uint8_t*)planes[1] + yuvInfo.fSizeInMemory[1];
// Get the YUV planes and update plane sizes to actual image size
if (!pixelRef->getYUV8Planes(yuvInfo.fSize, planes, yuvInfo.fRowBytes,
&yuvInfo.fColorSpace)) {
return NULL;
}
if (useCache) {
// Decoding is done, cache the resulting YUV planes
SkYUVPlanesCache::Add(pixelRef->getGenerationID(), cachedData, &yuvInfo);
}
}
GrSurfaceDesc yuvDesc;
yuvDesc.fConfig = kAlpha_8_GrPixelConfig;
SkAutoTUnref<GrTexture> yuvTextures[3];
for (int i = 0; i < 3; ++i) {
yuvDesc.fWidth = yuvInfo.fSize[i].fWidth;
yuvDesc.fHeight = yuvInfo.fSize[i].fHeight;
bool needsExactTexture =
(yuvDesc.fWidth != yuvInfo.fSize[0].fWidth) ||
(yuvDesc.fHeight != yuvInfo.fSize[0].fHeight);
if (needsExactTexture) {
yuvTextures[i].reset(ctx->textureProvider()->createTexture(yuvDesc, true));
} else {
yuvTextures[i].reset(ctx->textureProvider()->createApproxTexture(yuvDesc));
}
if (!yuvTextures[i] ||
!yuvTextures[i]->writePixels(0, 0, yuvDesc.fWidth, yuvDesc.fHeight,
yuvDesc.fConfig, planes[i], yuvInfo.fRowBytes[i])) {
return NULL;
}
}
GrSurfaceDesc rtDesc = desc;
rtDesc.fFlags = rtDesc.fFlags | kRenderTarget_GrSurfaceFlag;
GrTexture* result = create_texture_for_bmp(ctx, optionalKey, rtDesc, pixelRef, NULL, 0);
if (!result) {
return NULL;
}
GrRenderTarget* renderTarget = result->asRenderTarget();
SkASSERT(renderTarget);
GrPaint paint;
SkAutoTUnref<GrFragmentProcessor>
yuvToRgbProcessor(GrYUVtoRGBEffect::Create(paint.getProcessorDataManager(), yuvTextures[0],
yuvTextures[1], yuvTextures[2],
yuvInfo.fSize, yuvInfo.fColorSpace));
paint.addColorProcessor(yuvToRgbProcessor);
SkRect r = SkRect::MakeWH(SkIntToScalar(yuvInfo.fSize[0].fWidth),
SkIntToScalar(yuvInfo.fSize[0].fHeight));
GrDrawContext* drawContext = ctx->drawContext();
if (!drawContext) {
return NULL;
}
drawContext->drawRect(renderTarget, GrClip::WideOpen(), paint, SkMatrix::I(), r);
return result;
}
DEF_TEST(BitmapCopy, reporter) {
static const bool isExtracted[] = {
false, true
};
for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) {
SkBitmap srcOpaque, srcPremul;
setup_src_bitmaps(&srcOpaque, &srcPremul, gPairs[i].fColorType);
for (size_t j = 0; j < SK_ARRAY_COUNT(gPairs); j++) {
SkBitmap dst;
bool success = srcPremul.copyTo(&dst, gPairs[j].fColorType);
bool expected = gPairs[i].fValid[j] != '0';
if (success != expected) {
ERRORF(reporter, "SkBitmap::copyTo from %s to %s. expected %s "
"returned %s", gColorTypeName[i], gColorTypeName[j],
boolStr(expected), boolStr(success));
}
bool canSucceed = srcPremul.canCopyTo(gPairs[j].fColorType);
if (success != canSucceed) {
ERRORF(reporter, "SkBitmap::copyTo from %s to %s. returned %s "
"canCopyTo %s", gColorTypeName[i], gColorTypeName[j],
boolStr(success), boolStr(canSucceed));
}
if (success) {
REPORTER_ASSERT(reporter, srcPremul.width() == dst.width());
REPORTER_ASSERT(reporter, srcPremul.height() == dst.height());
REPORTER_ASSERT(reporter, dst.colorType() == gPairs[j].fColorType);
test_isOpaque(reporter, srcOpaque, srcPremul, dst.colorType());
if (srcPremul.colorType() == dst.colorType()) {
SkAutoLockPixels srcLock(srcPremul);
SkAutoLockPixels dstLock(dst);
REPORTER_ASSERT(reporter, srcPremul.readyToDraw());
REPORTER_ASSERT(reporter, dst.readyToDraw());
const char* srcP = (const char*)srcPremul.getAddr(0, 0);
const char* dstP = (const char*)dst.getAddr(0, 0);
REPORTER_ASSERT(reporter, srcP != dstP);
REPORTER_ASSERT(reporter, !memcmp(srcP, dstP,
srcPremul.getSize()));
REPORTER_ASSERT(reporter, srcPremul.getGenerationID() == dst.getGenerationID());
} else {
REPORTER_ASSERT(reporter, srcPremul.getGenerationID() != dst.getGenerationID());
}
} else {
// dst should be unchanged from its initial state
REPORTER_ASSERT(reporter, dst.colorType() == kUnknown_SkColorType);
REPORTER_ASSERT(reporter, dst.width() == 0);
REPORTER_ASSERT(reporter, dst.height() == 0);
}
} // for (size_t j = ...
// Tests for getSafeSize(), getSafeSize64(), copyPixelsTo(),
// copyPixelsFrom().
//
for (size_t copyCase = 0; copyCase < SK_ARRAY_COUNT(isExtracted);
++copyCase) {
// Test copying to/from external buffer.
// Note: the tests below have hard-coded values ---
// Please take care if modifying.
// Tests for getSafeSize64().
// Test with a very large configuration without pixel buffer
// attached.
SkBitmap tstSafeSize;
tstSafeSize.setConfig(SkImageInfo::Make(100000000U, 100000000U,
gPairs[i].fColorType,
kPremul_SkAlphaType));
int64_t safeSize = tstSafeSize.computeSafeSize64();
if (safeSize < 0) {
ERRORF(reporter, "getSafeSize64() negative: %s",
gColorTypeName[tstSafeSize.colorType()]);
}
bool sizeFail = false;
// Compare against hand-computed values.
switch (gPairs[i].fColorType) {
case kUnknown_SkColorType:
break;
case kAlpha_8_SkColorType:
case kIndex_8_SkColorType:
if (safeSize != 0x2386F26FC10000LL) {
sizeFail = true;
}
break;
case kRGB_565_SkColorType:
case kARGB_4444_SkColorType:
if (safeSize != 0x470DE4DF820000LL) {
sizeFail = true;
}
break;
case kN32_SkColorType:
if (safeSize != 0x8E1BC9BF040000LL) {
sizeFail = true;
}
break;
default:
break;
}
if (sizeFail) {
ERRORF(reporter, "computeSafeSize64() wrong size: %s",
gColorTypeName[tstSafeSize.colorType()]);
}
int subW = 2;
int subH = 2;
// Create bitmap to act as source for copies and subsets.
SkBitmap src, subset;
SkColorTable* ct = NULL;
if (kIndex_8_SkColorType == src.colorType()) {
ct = init_ctable(kPremul_SkAlphaType);
}
if (isExtracted[copyCase]) { // A larger image to extract from.
src.allocPixels(SkImageInfo::Make(2 * subW + 1, subH,
gPairs[i].fColorType,
kPremul_SkAlphaType));
} else { // Tests expect a 2x2 bitmap, so make smaller.
src.allocPixels(SkImageInfo::Make(subW, subH,
gPairs[i].fColorType,
kPremul_SkAlphaType));
}
SkSafeUnref(ct);
// Either copy src or extract into 'subset', which is used
// for subsequent calls to copyPixelsTo/From.
bool srcReady = false;
// Test relies on older behavior that extractSubset will fail on
// kUnknown_SkColorType
if (kUnknown_SkColorType != src.colorType() &&
isExtracted[copyCase]) {
// The extractedSubset() test case allows us to test copy-
// ing when src and dst mave possibly different strides.
SkIRect r;
r.set(1, 0, 1 + subW, subH); // 2x2 extracted bitmap
srcReady = src.extractSubset(&subset, r);
} else {
srcReady = src.copyTo(&subset);
}
// Not all configurations will generate a valid 'subset'.
if (srcReady) {
// Allocate our target buffer 'buf' for all copies.
// To simplify verifying correctness of copies attach
// buf to a SkBitmap, but copies are done using the
// raw buffer pointer.
const size_t bufSize = subH *
SkColorTypeMinRowBytes(src.colorType(), subW) * 2;
SkAutoMalloc autoBuf (bufSize);
uint8_t* buf = static_cast<uint8_t*>(autoBuf.get());
SkBitmap bufBm; // Attach buf to this bitmap.
bool successExpected;
// Set up values for each pixel being copied.
Coordinates coords(subW * subH);
for (int x = 0; x < subW; ++x)
for (int y = 0; y < subH; ++y)
{
int index = y * subW + x;
SkASSERT(index < coords.length);
coords[index]->fX = x;
coords[index]->fY = y;
}
writeCoordPixels(subset, coords);
// Test #1 ////////////////////////////////////////////
const SkImageInfo info = SkImageInfo::Make(subW, subH,
gPairs[i].fColorType,
kPremul_SkAlphaType);
// Before/after comparisons easier if we attach buf
// to an appropriately configured SkBitmap.
memset(buf, 0xFF, bufSize);
// Config with stride greater than src but that fits in buf.
bufBm.installPixels(info, buf, info.minRowBytes() * 2);
successExpected = false;
// Then attempt to copy with a stride that is too large
// to fit in the buffer.
REPORTER_ASSERT(reporter,
subset.copyPixelsTo(buf, bufSize, bufBm.rowBytes() * 3)
== successExpected);
if (successExpected)
reportCopyVerification(subset, bufBm, coords,
"copyPixelsTo(buf, bufSize, 1.5*maxRowBytes)",
reporter);
// Test #2 ////////////////////////////////////////////
// This test should always succeed, but in the case
// of extracted bitmaps only because we handle the
// issue of getSafeSize(). Without getSafeSize()
// buffer overrun/read would occur.
memset(buf, 0xFF, bufSize);
bufBm.installPixels(info, buf, subset.rowBytes());
successExpected = subset.getSafeSize() <= bufSize;
REPORTER_ASSERT(reporter,
subset.copyPixelsTo(buf, bufSize) ==
successExpected);
if (successExpected)
reportCopyVerification(subset, bufBm, coords,
"copyPixelsTo(buf, bufSize)", reporter);
// Test #3 ////////////////////////////////////////////
// Copy with different stride between src and dst.
memset(buf, 0xFF, bufSize);
bufBm.installPixels(info, buf, subset.rowBytes()+1);
successExpected = true; // Should always work.
REPORTER_ASSERT(reporter,
subset.copyPixelsTo(buf, bufSize,
subset.rowBytes()+1) == successExpected);
if (successExpected)
reportCopyVerification(subset, bufBm, coords,
"copyPixelsTo(buf, bufSize, rowBytes+1)", reporter);
// Test #4 ////////////////////////////////////////////
// Test copy with stride too small.
memset(buf, 0xFF, bufSize);
bufBm.installPixels(info, buf, info.minRowBytes());
successExpected = false;
// Request copy with stride too small.
REPORTER_ASSERT(reporter,
subset.copyPixelsTo(buf, bufSize, bufBm.rowBytes()-1)
== successExpected);
if (successExpected)
reportCopyVerification(subset, bufBm, coords,
"copyPixelsTo(buf, bufSize, rowBytes()-1)", reporter);
#if 0 // copyPixelsFrom is gone
// Test #5 ////////////////////////////////////////////
// Tests the case where the source stride is too small
// for the source configuration.
memset(buf, 0xFF, bufSize);
bufBm.installPixels(info, buf, info.minRowBytes());
writeCoordPixels(bufBm, coords);
REPORTER_ASSERT(reporter,
subset.copyPixelsFrom(buf, bufSize, 1) == false);
// Test #6 ///////////////////////////////////////////
// Tests basic copy from an external buffer to the bitmap.
// If the bitmap is "extracted", this also tests the case
// where the source stride is different from the dest.
// stride.
// We've made the buffer large enough to always succeed.
bufBm.installPixels(info, buf, info.minRowBytes());
writeCoordPixels(bufBm, coords);
REPORTER_ASSERT(reporter,
subset.copyPixelsFrom(buf, bufSize, bufBm.rowBytes()) ==
true);
reportCopyVerification(bufBm, subset, coords,
"copyPixelsFrom(buf, bufSize)",
reporter);
// Test #7 ////////////////////////////////////////////
// Tests the case where the source buffer is too small
// for the transfer.
REPORTER_ASSERT(reporter,
subset.copyPixelsFrom(buf, 1, subset.rowBytes()) ==
false);
#endif
}
} // for (size_t copyCase ...
}
}
SkImageDecoder::Result SkASTCImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
SkAutoMalloc autoMal;
const size_t length = SkCopyStreamToStorage(&autoMal, stream);
if (0 == length) {
return kFailure;
}
unsigned char* buf = (unsigned char*)autoMal.get();
// Make sure that the magic header is there...
SkASSERT(SkEndian_SwapLE32(*(reinterpret_cast<uint32_t*>(buf))) == kASTCMagicNumber);
// Advance past the magic header
buf += 4;
const int blockDimX = buf[0];
const int blockDimY = buf[1];
const int blockDimZ = buf[2];
if (1 != blockDimZ) {
// We don't support decoding 3D
return kFailure;
}
// Choose the proper ASTC format
SkTextureCompressor::Format astcFormat;
if (4 == blockDimX && 4 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_4x4_Format;
} else if (5 == blockDimX && 4 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_5x4_Format;
} else if (5 == blockDimX && 5 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_5x5_Format;
} else if (6 == blockDimX && 5 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_6x5_Format;
} else if (6 == blockDimX && 6 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_6x6_Format;
} else if (8 == blockDimX && 5 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_8x5_Format;
} else if (8 == blockDimX && 6 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_8x6_Format;
} else if (8 == blockDimX && 8 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_8x8_Format;
} else if (10 == blockDimX && 5 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_10x5_Format;
} else if (10 == blockDimX && 6 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_10x6_Format;
} else if (10 == blockDimX && 8 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_10x8_Format;
} else if (10 == blockDimX && 10 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_10x10_Format;
} else if (12 == blockDimX && 10 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_12x10_Format;
} else if (12 == blockDimX && 12 == blockDimY) {
astcFormat = SkTextureCompressor::kASTC_12x12_Format;
} else {
// We don't support any other block dimensions..
return kFailure;
}
// Advance buf past the block dimensions
buf += 3;
// Read the width/height/depth from the buffer...
const int width = read_24bit(buf);
const int height = read_24bit(buf + 3);
const int depth = read_24bit(buf + 6);
if (1 != depth) {
// We don't support decoding 3D.
return kFailure;
}
// Advance the buffer past the image dimensions
buf += 9;
// Setup the sampler...
SkScaledBitmapSampler sampler(width, height, this->getSampleSize());
// Determine the alpha of the bitmap...
SkAlphaType alphaType = kOpaque_SkAlphaType;
if (this->getRequireUnpremultipliedColors()) {
alphaType = kUnpremul_SkAlphaType;
} else {
alphaType = kPremul_SkAlphaType;
}
// Set the config...
bm->setInfo(SkImageInfo::MakeN32(sampler.scaledWidth(), sampler.scaledHeight(), alphaType));
if (SkImageDecoder::kDecodeBounds_Mode == mode) {
return kSuccess;
}
if (!this->allocPixelRef(bm, NULL)) {
return kFailure;
}
// Lock the pixels, since we're about to write to them...
SkAutoLockPixels alp(*bm);
if (!sampler.begin(bm, SkScaledBitmapSampler::kRGBA, *this)) {
return kFailure;
}
// ASTC Data is encoded as RGBA pixels, so we should extract it as such
int nPixels = width * height;
SkAutoMalloc outRGBAData(nPixels * 4);
uint8_t *outRGBADataPtr = reinterpret_cast<uint8_t *>(outRGBAData.get());
// Decode ASTC
if (!SkTextureCompressor::DecompressBufferFromFormat(
outRGBADataPtr, width*4, buf, width, height, astcFormat)) {
return kFailure;
}
// Set each of the pixels...
const int srcRowBytes = width * 4;
const int dstHeight = sampler.scaledHeight();
const uint8_t *srcRow = reinterpret_cast<uint8_t *>(outRGBADataPtr);
srcRow += sampler.srcY0() * srcRowBytes;
for (int y = 0; y < dstHeight; ++y) {
sampler.next(srcRow);
srcRow += sampler.srcDY() * srcRowBytes;
}
return kSuccess;
}
