| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkImageGenerator.h" |
| #include "SkNextID.h" |
| |
| SkImageGenerator::SkImageGenerator(const SkImageInfo& info) |
| : fInfo(info) |
| , fUniqueID(SkNextID::ImageID()) |
| {} |
| |
| bool SkImageGenerator::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, |
| SkPMColor ctable[], int* ctableCount) { |
| if (kUnknown_SkColorType == info.colorType()) { |
| return false; |
| } |
| if (nullptr == pixels) { |
| return false; |
| } |
| if (rowBytes < info.minRowBytes()) { |
| return false; |
| } |
| |
| if (kIndex_8_SkColorType == info.colorType()) { |
| if (nullptr == ctable || nullptr == ctableCount) { |
| return false; |
| } |
| } else { |
| if (ctableCount) { |
| *ctableCount = 0; |
| } |
| ctableCount = nullptr; |
| ctable = nullptr; |
| } |
| |
| const bool success = this->onGetPixels(info, pixels, rowBytes, ctable, ctableCount); |
| if (success && ctableCount) { |
| SkASSERT(*ctableCount >= 0 && *ctableCount <= 256); |
| } |
| return success; |
| } |
| |
| bool SkImageGenerator::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes) { |
| SkASSERT(kIndex_8_SkColorType != info.colorType()); |
| if (kIndex_8_SkColorType == info.colorType()) { |
| return false; |
| } |
| return this->getPixels(info, pixels, rowBytes, nullptr, nullptr); |
| } |
| |
| bool SkImageGenerator::getYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3], |
| SkYUVColorSpace* colorSpace) { |
| #ifdef SK_DEBUG |
| // In all cases, we need the sizes array |
| SkASSERT(sizes); |
| |
| bool isValidWithPlanes = (planes) && (rowBytes) && |
| ((planes[0]) && (planes[1]) && (planes[2]) && |
| (0 != rowBytes[0]) && (0 != rowBytes[1]) && (0 != rowBytes[2])); |
| bool isValidWithoutPlanes = |
| ((nullptr == planes) || |
| ((nullptr == planes[0]) && (nullptr == planes[1]) && (nullptr == planes[2]))) && |
| ((nullptr == rowBytes) || |
| ((0 == rowBytes[0]) && (0 == rowBytes[1]) && (0 == rowBytes[2]))); |
| |
| // Either we have all planes and rowBytes information or we have none of it |
| // Having only partial information is not supported |
| SkASSERT(isValidWithPlanes || isValidWithoutPlanes); |
| |
| // If we do have planes information, make sure all sizes are non 0 |
| // and all rowBytes are valid |
| SkASSERT(!isValidWithPlanes || |
| ((sizes[0].fWidth >= 0) && |
| (sizes[0].fHeight >= 0) && |
| (sizes[1].fWidth >= 0) && |
| (sizes[1].fHeight >= 0) && |
| (sizes[2].fWidth >= 0) && |
| (sizes[2].fHeight >= 0) && |
| (rowBytes[0] >= (size_t)sizes[0].fWidth) && |
| (rowBytes[1] >= (size_t)sizes[1].fWidth) && |
| (rowBytes[2] >= (size_t)sizes[2].fWidth))); |
| #endif |
| |
| return this->onGetYUV8Planes(sizes, planes, rowBytes, colorSpace); |
| } |
| |
| bool SkImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3]) { |
| return false; |
| } |
| |
| bool SkImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3], |
| SkYUVColorSpace* colorSpace) { |
| // In order to maintain compatibility with clients that implemented the original |
| // onGetYUV8Planes interface, we assume that the color space is JPEG. |
| // TODO(rileya): remove this and the old onGetYUV8Planes once clients switch over to |
| // the new interface. |
| if (colorSpace) { |
| *colorSpace = kJPEG_SkYUVColorSpace; |
| } |
| return this->onGetYUV8Planes(sizes, planes, rowBytes); |
| } |
| |
| GrTexture* SkImageGenerator::generateTexture(GrContext* ctx, const SkIRect* subset) { |
| if (subset && !SkIRect::MakeWH(fInfo.width(), fInfo.height()).contains(*subset)) { |
| return nullptr; |
| } |
| return this->onGenerateTexture(ctx, subset); |
| } |
| |
| bool SkImageGenerator::computeScaledDimensions(SkScalar scale, SupportedSizes* sizes) { |
| if (scale > 0 && scale <= 1) { |
| return this->onComputeScaledDimensions(scale, sizes); |
| } |
| return false; |
| } |
| |
| bool SkImageGenerator::generateScaledPixels(const SkISize& scaledSize, |
| const SkIPoint& subsetOrigin, |
| const SkPixmap& subsetPixels) { |
| if (scaledSize.width() <= 0 || scaledSize.height() <= 0) { |
| return false; |
| } |
| if (subsetPixels.width() <= 0 || subsetPixels.height() <= 0) { |
| return false; |
| } |
| const SkIRect subset = SkIRect::MakeXYWH(subsetOrigin.x(), subsetOrigin.y(), |
| subsetPixels.width(), subsetPixels.height()); |
| if (!SkIRect::MakeWH(scaledSize.width(), scaledSize.height()).contains(subset)) { |
| return false; |
| } |
| return this->onGenerateScaledPixels(scaledSize, subsetOrigin, subsetPixels); |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////////////////////// |
| |
| SkData* SkImageGenerator::onRefEncodedData(SK_REFENCODEDDATA_CTXPARAM) { |
| return nullptr; |
| } |
| |
| bool SkImageGenerator::onGetPixels(const SkImageInfo& info, void* dst, size_t rb, |
| SkPMColor* colors, int* colorCount) { |
| return false; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #include "SkBitmap.h" |
| #include "SkColorTable.h" |
| |
| static bool reset_and_return_false(SkBitmap* bitmap) { |
| bitmap->reset(); |
| return false; |
| } |
| |
| bool SkImageGenerator::tryGenerateBitmap(SkBitmap* bitmap, const SkImageInfo* infoPtr, |
| SkBitmap::Allocator* allocator) { |
| SkImageInfo info = infoPtr ? *infoPtr : this->getInfo(); |
| if (0 == info.getSafeSize(info.minRowBytes())) { |
| return false; |
| } |
| if (!bitmap->setInfo(info)) { |
| return reset_and_return_false(bitmap); |
| } |
| |
| SkPMColor ctStorage[256]; |
| memset(ctStorage, 0xFF, sizeof(ctStorage)); // init with opaque-white for the moment |
| SkAutoTUnref<SkColorTable> ctable(new SkColorTable(ctStorage, 256)); |
| if (!bitmap->tryAllocPixels(allocator, ctable)) { |
| // SkResourceCache's custom allcator can'thandle ctables, so it may fail on |
| // kIndex_8_SkColorTable. |
| // https://bug.skia.org/4355 |
| #if 1 |
| // ignroe the allocator, and see if we can succeed without it |
| if (!bitmap->tryAllocPixels(nullptr, ctable)) { |
| return reset_and_return_false(bitmap); |
| } |
| #else |
| // this is the up-scale technique, not fully debugged, but we keep it here at the moment |
| // to remind ourselves that this might be better than ignoring the allocator. |
| |
| info = SkImageInfo::MakeN32(info.width(), info.height(), info.alphaType()); |
| if (!bitmap->setInfo(info)) { |
| return reset_and_return_false(bitmap); |
| } |
| // we pass nullptr for the ctable arg, since we are now explicitly N32 |
| if (!bitmap->tryAllocPixels(allocator, nullptr)) { |
| return reset_and_return_false(bitmap); |
| } |
| #endif |
| } |
| |
| bitmap->lockPixels(); |
| if (!bitmap->getPixels()) { |
| return reset_and_return_false(bitmap); |
| } |
| |
| int ctCount = 0; |
| if (!this->getPixels(bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(), |
| ctStorage, &ctCount)) { |
| return reset_and_return_false(bitmap); |
| } |
| |
| if (ctCount > 0) { |
| SkASSERT(kIndex_8_SkColorType == bitmap->colorType()); |
| // we and bitmap should be owners |
| SkASSERT(!ctable->unique()); |
| |
| // Now we need to overwrite the ctable we built earlier, with the correct colors. |
| // This does mean that we may have made the table too big, but that cannot be avoided |
| // until we can change SkImageGenerator's API to return us the ctable *before* we have to |
| // allocate space for all the pixels. |
| ctable->dangerous_overwriteColors(ctStorage, ctCount); |
| } else { |
| SkASSERT(kIndex_8_SkColorType != bitmap->colorType()); |
| // we should be the only owner |
| SkASSERT(ctable->unique()); |
| } |
| return true; |
| } |
| |
| #include "SkGraphics.h" |
| |
| static SkGraphics::ImageGeneratorFromEncodedFactory gFactory; |
| |
| SkGraphics::ImageGeneratorFromEncodedFactory |
| SkGraphics::SetImageGeneratorFromEncodedFactory(ImageGeneratorFromEncodedFactory factory) |
| { |
| ImageGeneratorFromEncodedFactory prev = gFactory; |
| gFactory = factory; |
| return prev; |
| } |
| |
| SkImageGenerator* SkImageGenerator::NewFromEncoded(SkData* data) { |
| if (nullptr == data) { |
| return nullptr; |
| } |
| if (gFactory) { |
| if (SkImageGenerator* generator = gFactory(data)) { |
| return generator; |
| } |
| } |
| return SkImageGenerator::NewFromEncodedImpl(data); |
| } |
