src/image/SkImage.cpp - platform/external/skia - Gitiles

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "SkBitmap.h"
 #include "SkBitmapCache.h"
 #include "SkCanvas.h"
 #include "SkColorSpace_Base.h"
 #include "SkData.h"
 #include "SkImageEncoder.h"
 #include "SkImageFilter.h"
 #include "SkImageFilterCache.h"
 #include "SkImageGenerator.h"
 #include "SkImagePriv.h"
 #include "SkImageShader.h"
 #include "SkImage_Base.h"
 #include "SkNextID.h"
 #include "SkPicture.h"
 #include "SkPixelRef.h"
 #include "SkPixelSerializer.h"
 #include "SkReadPixelsRec.h"
 #include "SkSpecialImage.h"
 #include "SkStream.h"
 #include "SkString.h"
 #include "SkSurface.h"

 #if SK_SUPPORT_GPU
 #include "GrTexture.h"
 #include "GrContext.h"
 #include "SkImage_Gpu.h"
 #endif

 SkImage::SkImage(int width, int height, uint32_t uniqueID)
     : fWidth(width)
     , fHeight(height)
     , fUniqueID(kNeedNewImageUniqueID == uniqueID ? SkNextID::ImageID() : uniqueID)
 {
     SkASSERT(width > 0);
     SkASSERT(height > 0);
 }

 bool SkImage::peekPixels(SkPixmap* pm) const {
     SkPixmap tmp;
     if (!pm) {
         pm = &tmp;
     }
     return as_IB(this)->onPeekPixels(pm);
 }

 bool SkImage::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
                            int srcX, int srcY, CachingHint chint) const {
     return as_IB(this)->onReadPixels(dstInfo, dstPixels, dstRowBytes, srcX, srcY, chint);
 }

 bool SkImage::scalePixels(const SkPixmap& dst, SkFilterQuality quality, CachingHint chint) const {
     if (this->width() == dst.width() && this->height() == dst.height()) {
         return this->readPixels(dst, 0, 0, chint);
     }

     // Idea: If/when SkImageGenerator supports a native-scaling API (where the generator itself
     //       can scale more efficiently) we should take advantage of it here.
     //
     SkBitmap bm;
     if (as_IB(this)->getROPixels(&bm, dst.info().colorSpace(), chint)) {
         SkPixmap pmap;
         // Note: By calling the pixmap scaler, we never cache the final result, so the chint
         //       is (currently) only being applied to the getROPixels. If we get a request to
         //       also attempt to cache the final (scaled) result, we would add that logic here.
         //
         return bm.peekPixels(&pmap) && pmap.scalePixels(dst, quality);
     }
     return false;
 }

 ///////////////////////////////////////////////////////////////////////////////////////////////////

 SkAlphaType SkImage::alphaType() const {
     return as_IB(this)->onAlphaType();
 }

 SkColorSpace* SkImage::colorSpace() const {
     return as_IB(this)->onImageInfo().colorSpace();
 }

 sk_sp<SkColorSpace> SkImage::refColorSpace() const {
     return as_IB(this)->onImageInfo().refColorSpace();
 }

 sk_sp<SkShader> SkImage::makeShader(SkShader::TileMode tileX, SkShader::TileMode tileY,
                                     const SkMatrix* localMatrix) const {
     return SkImageShader::Make(sk_ref_sp(const_cast<SkImage*>(this)), tileX, tileY, localMatrix);
 }

 sk_sp<SkData> SkImage::encodeToData(SkEncodedImageFormat type, int quality) const {
     SkBitmap bm;
     SkColorSpace* legacyColorSpace = nullptr;
     if (as_IB(this)->getROPixels(&bm, legacyColorSpace)) {
         SkDynamicMemoryWStream buf;
         return SkEncodeImage(&buf, bm, type, quality) ? buf.detachAsData() : nullptr;
     }
     return nullptr;
 }

 sk_sp<SkData> SkImage::encodeToData(SkPixelSerializer* serializer) const {
     sk_sp<SkData> encoded(this->refEncodedData());
     if (encoded &&
         (!serializer || serializer->useEncodedData(encoded->data(), encoded->size()))) {
         return encoded;
     }

     SkBitmap bm;
     SkPixmap pmap;
     SkColorSpace* legacyColorSpace = nullptr;
     if (as_IB(this)->getROPixels(&bm, legacyColorSpace) && bm.peekPixels(&pmap)) {
         if (serializer) {
             return serializer->encodeToData(pmap);
         } else {
             SkDynamicMemoryWStream buf;
             return SkEncodeImage(&buf, pmap, SkEncodedImageFormat::kPNG, 100)
                    ? buf.detachAsData() : nullptr;
         }
     }

     return nullptr;
 }

 sk_sp<SkData> SkImage::refEncodedData() const {
     return sk_sp<SkData>(as_IB(this)->onRefEncoded());
 }

 sk_sp<SkImage> SkImage::MakeFromEncoded(sk_sp<SkData> encoded, const SkIRect* subset) {
     if (nullptr == encoded || 0 == encoded->size()) {
         return nullptr;
     }
     return SkImage::MakeFromGenerator(SkImageGenerator::MakeFromEncoded(encoded), subset);
 }

 ///////////////////////////////////////////////////////////////////////////////////////////////////

 const char* SkImage::toString(SkString* str) const {
     str->appendf("image: (id:%d (%d, %d) %s)", this->uniqueID(), this->width(), this->height(),
                  this->isOpaque() ? "opaque" : "");
     return str->c_str();
 }

 sk_sp<SkImage> SkImage::makeSubset(const SkIRect& subset) const {
     if (subset.isEmpty()) {
         return nullptr;
     }

     const SkIRect bounds = SkIRect::MakeWH(this->width(), this->height());
     if (!bounds.contains(subset)) {
         return nullptr;
     }

     // optimization : return self if the subset == our bounds
     if (bounds == subset) {
         return sk_ref_sp(const_cast<SkImage*>(this));
     }
     return as_IB(this)->onMakeSubset(subset);
 }

 #if SK_SUPPORT_GPU

 GrTexture* SkImage::getTexture() const {
     return as_IB(this)->onGetTexture();
 }

 bool SkImage::isTextureBacked() const { return SkToBool(as_IB(this)->peekProxy()); }

 GrBackendObject SkImage::getTextureHandle(bool flushPendingGrContextIO,
                                           GrSurfaceOrigin* origin) const {
     return as_IB(this)->onGetTextureHandle(flushPendingGrContextIO, origin);
 }

 bool SkImage::isValid(GrContext* context) const {
     if (context && context->abandoned()) {
         return false;
     }
     return as_IB(this)->onIsValid(context);
 }

 #else

 GrTexture* SkImage::getTexture() const { return nullptr; }

 bool SkImage::isTextureBacked() const { return false; }

 GrBackendObject SkImage::getTextureHandle(bool, GrSurfaceOrigin*) const { return 0; }

 bool SkImage::isValid(GrContext* context) const {
     if (context) {
         return false;
     }
     return as_IB(this)->onIsValid(context);
 }

 #endif

 ///////////////////////////////////////////////////////////////////////////////

 SkImage_Base::SkImage_Base(int width, int height, uint32_t uniqueID)
     : INHERITED(width, height, uniqueID)
     , fAddedToCache(false)
 {}

 SkImage_Base::~SkImage_Base() {
     if (fAddedToCache.load()) {
         SkNotifyBitmapGenIDIsStale(this->uniqueID());
     }
 }

 bool SkImage::readPixels(const SkPixmap& pmap, int srcX, int srcY, CachingHint chint) const {
     return this->readPixels(pmap.info(), pmap.writable_addr(), pmap.rowBytes(), srcX, srcY, chint);
 }

 ///////////////////////////////////////////////////////////////////////////////////////////////////

 sk_sp<SkImage> SkImage::MakeFromBitmap(const SkBitmap& bm) {
     SkPixelRef* pr = bm.pixelRef();
     if (nullptr == pr) {
         return nullptr;
     }

     return SkMakeImageFromRasterBitmap(bm, kIfMutable_SkCopyPixelsMode);
 }

 bool SkImage::asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode mode) const {
     return as_IB(this)->onAsLegacyBitmap(bitmap, mode);
 }

 bool SkImage_Base::onAsLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode mode) const {
     // As the base-class, all we can do is make a copy (regardless of mode).
     // Subclasses that want to be more optimal should override.
     SkImageInfo info = this->onImageInfo().makeColorType(kN32_SkColorType).makeColorSpace(nullptr);
     if (!bitmap->tryAllocPixels(info)) {
         return false;
     }
     if (!this->readPixels(bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(), 0, 0)) {
         bitmap->reset();
         return false;
     }

     if (kRO_LegacyBitmapMode == mode) {
         bitmap->setImmutable();
     }
     return true;
 }

 sk_sp<SkImage> SkImage::MakeFromPicture(sk_sp<SkPicture> picture, const SkISize& dimensions,
                                         const SkMatrix* matrix, const SkPaint* paint,
                                         BitDepth bitDepth, sk_sp<SkColorSpace> colorSpace) {
     return MakeFromGenerator(SkImageGenerator::MakeFromPicture(dimensions, std::move(picture),
                                                                matrix, paint, bitDepth,
                                                                std::move(colorSpace)));
 }

 sk_sp<SkImage> SkImage::makeWithFilter(const SkImageFilter* filter, const SkIRect& subset,
                                        const SkIRect& clipBounds, SkIRect* outSubset,
                                        SkIPoint* offset) const {
     if (!filter || !outSubset || !offset || !this->bounds().contains(subset)) {
         return nullptr;
     }
     SkColorSpace* colorSpace = as_IB(this)->onImageInfo().colorSpace();
     sk_sp<SkSpecialImage> srcSpecialImage = SkSpecialImage::MakeFromImage(
         subset, sk_ref_sp(const_cast<SkImage*>(this)), colorSpace);
     if (!srcSpecialImage) {
         return nullptr;
     }

     sk_sp<SkImageFilterCache> cache(
         SkImageFilterCache::Create(SkImageFilterCache::kDefaultTransientSize));
     SkImageFilter::OutputProperties outputProperties(colorSpace);
     SkImageFilter::Context context(SkMatrix::I(), clipBounds, cache.get(), outputProperties);

     sk_sp<SkSpecialImage> result = filter->filterImage(srcSpecialImage.get(), context, offset);
     if (!result) {
         return nullptr;
     }

     *outSubset = SkIRect::MakeWH(result->width(), result->height());
     if (!outSubset->intersect(clipBounds.makeOffset(-offset->x(), -offset->y()))) {
         return nullptr;
     }
     offset->fX += outSubset->x();
     offset->fY += outSubset->y();

     // Note that here we're returning the special image's entire backing store, loose padding
     // and all!
     return result->asImage();
 }

 bool SkImage::isLazyGenerated() const {
     return as_IB(this)->onIsLazyGenerated();
 }

 bool SkImage::isAlphaOnly() const {
     return as_IB(this)->onImageInfo().colorType() == kAlpha_8_SkColorType;
 }

 sk_sp<SkImage> SkImage::makeColorSpace(sk_sp<SkColorSpace> target,
                                        SkTransferFunctionBehavior premulBehavior) const {
     SkColorSpaceTransferFn fn;
     if (!target || !target->isNumericalTransferFn(&fn)) {
         return nullptr;
     }

     // No need to create a new image if:
     // (1) The color spaces are equal.
     // (2) The color type is kAlpha8.
     if (SkColorSpace::Equals(this->colorSpace(), target.get()) ||
             kAlpha_8_SkColorType == as_IB(this)->onImageInfo().colorType()) {
         return sk_ref_sp(const_cast<SkImage*>(this));
     }

     SkColorType targetColorType = kN32_SkColorType;
     if (SkTransferFunctionBehavior::kRespect == premulBehavior && target->gammaIsLinear()) {
         targetColorType = kRGBA_F16_SkColorType;
     }

     // TODO: We might consider making this a deferred conversion?
     return as_IB(this)->onMakeColorSpace(std::move(target), targetColorType, premulBehavior);
 }

 //////////////////////////////////////////////////////////////////////////////////////

 #if !SK_SUPPORT_GPU

 sk_sp<SkImage> MakeTextureFromMipMap(GrContext*, const SkImageInfo&, const GrMipLevel texels[],
                                      int mipLevelCount, SkBudgeted, SkDestinationSurfaceColorMode) {
     return nullptr;
 }

 sk_sp<SkImage> SkImage::MakeFromTexture(GrContext*, const GrBackendTextureDesc&, SkAlphaType,
                                         sk_sp<SkColorSpace>, TextureReleaseProc, ReleaseContext) {
     return nullptr;
 }

 sk_sp<SkImage> SkImage::MakeFromTexture(GrContext* ctx,
                                         const GrBackendTexture& tex, GrSurfaceOrigin origin,
                                         SkAlphaType at, sk_sp<SkColorSpace> cs,
                                         TextureReleaseProc releaseP, ReleaseContext releaseC) {
     return nullptr;
 }

 size_t SkImage::getDeferredTextureImageData(const GrContextThreadSafeProxy&,
                                             const DeferredTextureImageUsageParams[],
                                             int paramCnt, void* buffer,
                                             SkColorSpace* dstColorSpace,
                                             SkColorType dstColorType) const {
     return 0;
 }

 sk_sp<SkImage> SkImage::MakeFromDeferredTextureImageData(GrContext* context, const void*,
                                                          SkBudgeted) {
     return nullptr;
 }

 sk_sp<SkImage> SkImage::MakeFromAdoptedTexture(GrContext*, const GrBackendTextureDesc&,
                                                SkAlphaType, sk_sp<SkColorSpace>) {
     return nullptr;
 }

 sk_sp<SkImage> SkImage::MakeFromAdoptedTexture(GrContext* ctx,
                                                const GrBackendTexture& tex, GrSurfaceOrigin origin,
                                                SkAlphaType at, sk_sp<SkColorSpace> cs) {
     return nullptr;
 }

 sk_sp<SkImage> SkImage::MakeFromYUVTexturesCopy(GrContext* ctx, SkYUVColorSpace space,
                                                 const GrBackendObject yuvTextureHandles[3],
                                                 const SkISize yuvSizes[3],
                                                 GrSurfaceOrigin origin,
                                                 sk_sp<SkColorSpace> imageColorSpace) {
     return nullptr;
 }

 sk_sp<SkImage> SkImage::makeTextureImage(GrContext*, SkColorSpace* dstColorSpace) const {
     return nullptr;
 }

 sk_sp<SkImage> SkImage::makeNonTextureImage() const {
     return sk_ref_sp(const_cast<SkImage*>(this));
 }

 #endif

 ///////////////////////////////////////////////////////////////////////////////////////////////////

 sk_sp<SkImage> MakeTextureFromMipMap(GrContext*, const SkImageInfo&, const GrMipLevel texels[],
                                      int mipLevelCount, SkBudgeted) {
     return nullptr;
 }

 ///////////////////////////////////////////////////////////////////////////////////////////////////
 #include "SkImageDeserializer.h"

 sk_sp<SkImage> SkImageDeserializer::makeFromData(SkData* data, const SkIRect* subset) {
     return SkImage::MakeFromEncoded(sk_ref_sp(data), subset);
 }
 sk_sp<SkImage> SkImageDeserializer::makeFromMemory(const void* data, size_t length,
                                                    const SkIRect* subset) {
     return SkImage::MakeFromEncoded(SkData::MakeWithCopy(data, length), subset);
 }

 ///////////////////////////////////////////////////////////////////////////////////////////////////

 bool SkImage_pinAsTexture(const SkImage* image, GrContext* ctx) {
     SkASSERT(image);
     SkASSERT(ctx);
     return as_IB(image)->onPinAsTexture(ctx);
 }

 void SkImage_unpinAsTexture(const SkImage* image, GrContext* ctx) {
     SkASSERT(image);
     SkASSERT(ctx);
     as_IB(image)->onUnpinAsTexture(ctx);
 }

 ///////////////////////////////////////////////////////////////////////////////////////////////////

 sk_sp<SkImage> SkImageMakeRasterCopyAndAssignColorSpace(const SkImage* src,
                                                         SkColorSpace* colorSpace) {
     // Read the pixels out of the source image, with no conversion
     SkImageInfo info = as_IB(src)->onImageInfo();
     if (kUnknown_SkColorType == info.colorType()) {
         SkDEBUGFAIL("Unexpected color type");
         return nullptr;
     }

     size_t rowBytes = info.minRowBytes();
     size_t size = info.getSafeSize(rowBytes);
     auto data = SkData::MakeUninitialized(size);
     if (!data) {
         return nullptr;
     }

     SkPixmap pm(info, data->writable_data(), rowBytes);
     if (!src->readPixels(pm, 0, 0, SkImage::kDisallow_CachingHint)) {
         return nullptr;
     }

     // Wrap them in a new image with a different color space
     return SkImage::MakeRasterData(info.makeColorSpace(sk_ref_sp(colorSpace)), data, rowBytes);
 }
	/*
	* Copyright 2012 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "SkBitmap.h"
	#include "SkBitmapCache.h"
	#include "SkCanvas.h"
	#include "SkColorSpace_Base.h"
	#include "SkData.h"
	#include "SkImageEncoder.h"
	#include "SkImageFilter.h"
	#include "SkImageFilterCache.h"
	#include "SkImageGenerator.h"
	#include "SkImagePriv.h"
	#include "SkImageShader.h"
	#include "SkImage_Base.h"
	#include "SkNextID.h"
	#include "SkPicture.h"
	#include "SkPixelRef.h"
	#include "SkPixelSerializer.h"
	#include "SkReadPixelsRec.h"
	#include "SkSpecialImage.h"
	#include "SkStream.h"
	#include "SkString.h"
	#include "SkSurface.h"

	#if SK_SUPPORT_GPU
	#include "GrTexture.h"
	#include "GrContext.h"
	#include "SkImage_Gpu.h"
	#endif

	SkImage::SkImage(int width, int height, uint32_t uniqueID)
	: fWidth(width)
	, fHeight(height)
	, fUniqueID(kNeedNewImageUniqueID == uniqueID ? SkNextID::ImageID() : uniqueID)
	{
	SkASSERT(width > 0);
	SkASSERT(height > 0);
	}

	bool SkImage::peekPixels(SkPixmap* pm) const {
	SkPixmap tmp;
	if (!pm) {
	pm = &tmp;
	}
	return as_IB(this)->onPeekPixels(pm);
	}

	bool SkImage::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
	int srcX, int srcY, CachingHint chint) const {
	return as_IB(this)->onReadPixels(dstInfo, dstPixels, dstRowBytes, srcX, srcY, chint);
	}

	bool SkImage::scalePixels(const SkPixmap& dst, SkFilterQuality quality, CachingHint chint) const {
	if (this->width() == dst.width() && this->height() == dst.height()) {
	return this->readPixels(dst, 0, 0, chint);
	}

	// Idea: If/when SkImageGenerator supports a native-scaling API (where the generator itself
	// can scale more efficiently) we should take advantage of it here.
	//
	SkBitmap bm;
	if (as_IB(this)->getROPixels(&bm, dst.info().colorSpace(), chint)) {
	SkPixmap pmap;
	// Note: By calling the pixmap scaler, we never cache the final result, so the chint
	// is (currently) only being applied to the getROPixels. If we get a request to
	// also attempt to cache the final (scaled) result, we would add that logic here.
	//
	return bm.peekPixels(&pmap) && pmap.scalePixels(dst, quality);
	}
	return false;
	}

	///////////////////////////////////////////////////////////////////////////////////////////////////

	SkAlphaType SkImage::alphaType() const {
	return as_IB(this)->onAlphaType();
	}

	SkColorSpace* SkImage::colorSpace() const {
	return as_IB(this)->onImageInfo().colorSpace();
	}

	sk_sp<SkColorSpace> SkImage::refColorSpace() const {
	return as_IB(this)->onImageInfo().refColorSpace();
	}

	sk_sp<SkShader> SkImage::makeShader(SkShader::TileMode tileX, SkShader::TileMode tileY,
	const SkMatrix* localMatrix) const {
	return SkImageShader::Make(sk_ref_sp(const_cast<SkImage*>(this)), tileX, tileY, localMatrix);
	}

	sk_sp<SkData> SkImage::encodeToData(SkEncodedImageFormat type, int quality) const {
	SkBitmap bm;
	SkColorSpace* legacyColorSpace = nullptr;
	if (as_IB(this)->getROPixels(&bm, legacyColorSpace)) {
	SkDynamicMemoryWStream buf;
	return SkEncodeImage(&buf, bm, type, quality) ? buf.detachAsData() : nullptr;
	}
	return nullptr;
	}

	sk_sp<SkData> SkImage::encodeToData(SkPixelSerializer* serializer) const {
	sk_sp<SkData> encoded(this->refEncodedData());
	if (encoded &&
	(!serializer \|\| serializer->useEncodedData(encoded->data(), encoded->size()))) {
	return encoded;
	}

	SkBitmap bm;
	SkPixmap pmap;
	SkColorSpace* legacyColorSpace = nullptr;
	if (as_IB(this)->getROPixels(&bm, legacyColorSpace) && bm.peekPixels(&pmap)) {
	if (serializer) {
	return serializer->encodeToData(pmap);
	} else {
	SkDynamicMemoryWStream buf;
	return SkEncodeImage(&buf, pmap, SkEncodedImageFormat::kPNG, 100)
	? buf.detachAsData() : nullptr;
	}
	}

	return nullptr;
	}

	sk_sp<SkData> SkImage::refEncodedData() const {
	return sk_sp<SkData>(as_IB(this)->onRefEncoded());
	}

	sk_sp<SkImage> SkImage::MakeFromEncoded(sk_sp<SkData> encoded, const SkIRect* subset) {
	if (nullptr == encoded \|\| 0 == encoded->size()) {
	return nullptr;
	}
	return SkImage::MakeFromGenerator(SkImageGenerator::MakeFromEncoded(encoded), subset);
	}

	///////////////////////////////////////////////////////////////////////////////////////////////////

	const char* SkImage::toString(SkString* str) const {
	str->appendf("image: (id:%d (%d, %d) %s)", this->uniqueID(), this->width(), this->height(),
	this->isOpaque() ? "opaque" : "");
	return str->c_str();
	}

	sk_sp<SkImage> SkImage::makeSubset(const SkIRect& subset) const {
	if (subset.isEmpty()) {
	return nullptr;
	}

	const SkIRect bounds = SkIRect::MakeWH(this->width(), this->height());
	if (!bounds.contains(subset)) {
	return nullptr;
	}

	// optimization : return self if the subset == our bounds
	if (bounds == subset) {
	return sk_ref_sp(const_cast<SkImage*>(this));
	}
	return as_IB(this)->onMakeSubset(subset);
	}

	#if SK_SUPPORT_GPU

	GrTexture* SkImage::getTexture() const {
	return as_IB(this)->onGetTexture();
	}

	bool SkImage::isTextureBacked() const { return SkToBool(as_IB(this)->peekProxy()); }

	GrBackendObject SkImage::getTextureHandle(bool flushPendingGrContextIO,
	GrSurfaceOrigin* origin) const {
	return as_IB(this)->onGetTextureHandle(flushPendingGrContextIO, origin);
	}

	bool SkImage::isValid(GrContext* context) const {
	if (context && context->abandoned()) {
	return false;
	}
	return as_IB(this)->onIsValid(context);
	}

	#else

	GrTexture* SkImage::getTexture() const { return nullptr; }

	bool SkImage::isTextureBacked() const { return false; }

	GrBackendObject SkImage::getTextureHandle(bool, GrSurfaceOrigin*) const { return 0; }

	bool SkImage::isValid(GrContext* context) const {
	if (context) {
	return false;
	}
	return as_IB(this)->onIsValid(context);
	}

	#endif

	///////////////////////////////////////////////////////////////////////////////

	SkImage_Base::SkImage_Base(int width, int height, uint32_t uniqueID)
	: INHERITED(width, height, uniqueID)
	, fAddedToCache(false)
	{}

	SkImage_Base::~SkImage_Base() {
	if (fAddedToCache.load()) {
	SkNotifyBitmapGenIDIsStale(this->uniqueID());
	}
	}

	bool SkImage::readPixels(const SkPixmap& pmap, int srcX, int srcY, CachingHint chint) const {
	return this->readPixels(pmap.info(), pmap.writable_addr(), pmap.rowBytes(), srcX, srcY, chint);
	}

	///////////////////////////////////////////////////////////////////////////////////////////////////

	sk_sp<SkImage> SkImage::MakeFromBitmap(const SkBitmap& bm) {
	SkPixelRef* pr = bm.pixelRef();
	if (nullptr == pr) {
	return nullptr;
	}

	return SkMakeImageFromRasterBitmap(bm, kIfMutable_SkCopyPixelsMode);
	}

	bool SkImage::asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode mode) const {
	return as_IB(this)->onAsLegacyBitmap(bitmap, mode);
	}

	bool SkImage_Base::onAsLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode mode) const {
	// As the base-class, all we can do is make a copy (regardless of mode).
	// Subclasses that want to be more optimal should override.
	SkImageInfo info = this->onImageInfo().makeColorType(kN32_SkColorType).makeColorSpace(nullptr);
	if (!bitmap->tryAllocPixels(info)) {
	return false;
	}
	if (!this->readPixels(bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(), 0, 0)) {
	bitmap->reset();
	return false;
	}

	if (kRO_LegacyBitmapMode == mode) {
	bitmap->setImmutable();
	}
	return true;
	}

	sk_sp<SkImage> SkImage::MakeFromPicture(sk_sp<SkPicture> picture, const SkISize& dimensions,
	const SkMatrix* matrix, const SkPaint* paint,
	BitDepth bitDepth, sk_sp<SkColorSpace> colorSpace) {
	return MakeFromGenerator(SkImageGenerator::MakeFromPicture(dimensions, std::move(picture),
	matrix, paint, bitDepth,
	std::move(colorSpace)));
	}

	sk_sp<SkImage> SkImage::makeWithFilter(const SkImageFilter* filter, const SkIRect& subset,
	const SkIRect& clipBounds, SkIRect* outSubset,
	SkIPoint* offset) const {
	if (!filter \|\| !outSubset \|\| !offset \|\| !this->bounds().contains(subset)) {
	return nullptr;
	}
	SkColorSpace* colorSpace = as_IB(this)->onImageInfo().colorSpace();
	sk_sp<SkSpecialImage> srcSpecialImage = SkSpecialImage::MakeFromImage(
	subset, sk_ref_sp(const_cast<SkImage*>(this)), colorSpace);
	if (!srcSpecialImage) {
	return nullptr;
	}

	sk_sp<SkImageFilterCache> cache(
	SkImageFilterCache::Create(SkImageFilterCache::kDefaultTransientSize));
	SkImageFilter::OutputProperties outputProperties(colorSpace);
	SkImageFilter::Context context(SkMatrix::I(), clipBounds, cache.get(), outputProperties);

	sk_sp<SkSpecialImage> result = filter->filterImage(srcSpecialImage.get(), context, offset);
	if (!result) {
	return nullptr;
	}

	*outSubset = SkIRect::MakeWH(result->width(), result->height());
	if (!outSubset->intersect(clipBounds.makeOffset(-offset->x(), -offset->y()))) {
	return nullptr;
	}
	offset->fX += outSubset->x();
	offset->fY += outSubset->y();

	// Note that here we're returning the special image's entire backing store, loose padding
	// and all!
	return result->asImage();
	}

	bool SkImage::isLazyGenerated() const {
	return as_IB(this)->onIsLazyGenerated();
	}

	bool SkImage::isAlphaOnly() const {
	return as_IB(this)->onImageInfo().colorType() == kAlpha_8_SkColorType;
	}

	sk_sp<SkImage> SkImage::makeColorSpace(sk_sp<SkColorSpace> target,
	SkTransferFunctionBehavior premulBehavior) const {
	SkColorSpaceTransferFn fn;
	if (!target \|\| !target->isNumericalTransferFn(&fn)) {
	return nullptr;
	}

	// No need to create a new image if:
	// (1) The color spaces are equal.
	// (2) The color type is kAlpha8.
	if (SkColorSpace::Equals(this->colorSpace(), target.get()) \|\|
	kAlpha_8_SkColorType == as_IB(this)->onImageInfo().colorType()) {
	return sk_ref_sp(const_cast<SkImage*>(this));
	}

	SkColorType targetColorType = kN32_SkColorType;
	if (SkTransferFunctionBehavior::kRespect == premulBehavior && target->gammaIsLinear()) {
	targetColorType = kRGBA_F16_SkColorType;
	}

	// TODO: We might consider making this a deferred conversion?
	return as_IB(this)->onMakeColorSpace(std::move(target), targetColorType, premulBehavior);
	}

	//////////////////////////////////////////////////////////////////////////////////////

	#if !SK_SUPPORT_GPU

	sk_sp<SkImage> MakeTextureFromMipMap(GrContext*, const SkImageInfo&, const GrMipLevel texels[],
	int mipLevelCount, SkBudgeted, SkDestinationSurfaceColorMode) {
	return nullptr;
	}

	sk_sp<SkImage> SkImage::MakeFromTexture(GrContext*, const GrBackendTextureDesc&, SkAlphaType,
	sk_sp<SkColorSpace>, TextureReleaseProc, ReleaseContext) {
	return nullptr;
	}

	sk_sp<SkImage> SkImage::MakeFromTexture(GrContext* ctx,
	const GrBackendTexture& tex, GrSurfaceOrigin origin,
	SkAlphaType at, sk_sp<SkColorSpace> cs,
	TextureReleaseProc releaseP, ReleaseContext releaseC) {
	return nullptr;
	}

	size_t SkImage::getDeferredTextureImageData(const GrContextThreadSafeProxy&,
	const DeferredTextureImageUsageParams[],
	int paramCnt, void* buffer,
	SkColorSpace* dstColorSpace,
	SkColorType dstColorType) const {
	return 0;
	}

	sk_sp<SkImage> SkImage::MakeFromDeferredTextureImageData(GrContext* context, const void*,
	SkBudgeted) {
	return nullptr;
	}

	sk_sp<SkImage> SkImage::MakeFromAdoptedTexture(GrContext*, const GrBackendTextureDesc&,
	SkAlphaType, sk_sp<SkColorSpace>) {
	return nullptr;
	}

	sk_sp<SkImage> SkImage::MakeFromAdoptedTexture(GrContext* ctx,
	const GrBackendTexture& tex, GrSurfaceOrigin origin,
	SkAlphaType at, sk_sp<SkColorSpace> cs) {
	return nullptr;
	}

	sk_sp<SkImage> SkImage::MakeFromYUVTexturesCopy(GrContext* ctx, SkYUVColorSpace space,
	const GrBackendObject yuvTextureHandles[3],
	const SkISize yuvSizes[3],
	GrSurfaceOrigin origin,
	sk_sp<SkColorSpace> imageColorSpace) {
	return nullptr;
	}

	sk_sp<SkImage> SkImage::makeTextureImage(GrContext, SkColorSpace dstColorSpace) const {
	return nullptr;
	}

	sk_sp<SkImage> SkImage::makeNonTextureImage() const {
	return sk_ref_sp(const_cast<SkImage*>(this));
	}

	#endif

	///////////////////////////////////////////////////////////////////////////////////////////////////

	sk_sp<SkImage> MakeTextureFromMipMap(GrContext*, const SkImageInfo&, const GrMipLevel texels[],
	int mipLevelCount, SkBudgeted) {
	return nullptr;
	}

	///////////////////////////////////////////////////////////////////////////////////////////////////
	#include "SkImageDeserializer.h"

	sk_sp<SkImage> SkImageDeserializer::makeFromData(SkData* data, const SkIRect* subset) {
	return SkImage::MakeFromEncoded(sk_ref_sp(data), subset);
	}
	sk_sp<SkImage> SkImageDeserializer::makeFromMemory(const void* data, size_t length,
	const SkIRect* subset) {
	return SkImage::MakeFromEncoded(SkData::MakeWithCopy(data, length), subset);
	}

	///////////////////////////////////////////////////////////////////////////////////////////////////

	bool SkImage_pinAsTexture(const SkImage* image, GrContext* ctx) {
	SkASSERT(image);
	SkASSERT(ctx);
	return as_IB(image)->onPinAsTexture(ctx);
	}

	void SkImage_unpinAsTexture(const SkImage* image, GrContext* ctx) {
	SkASSERT(image);
	SkASSERT(ctx);
	as_IB(image)->onUnpinAsTexture(ctx);
	}

	///////////////////////////////////////////////////////////////////////////////////////////////////

	sk_sp<SkImage> SkImageMakeRasterCopyAndAssignColorSpace(const SkImage* src,
	SkColorSpace* colorSpace) {
	// Read the pixels out of the source image, with no conversion
	SkImageInfo info = as_IB(src)->onImageInfo();
	if (kUnknown_SkColorType == info.colorType()) {
	SkDEBUGFAIL("Unexpected color type");
	return nullptr;
	}

	size_t rowBytes = info.minRowBytes();
	size_t size = info.getSafeSize(rowBytes);
	auto data = SkData::MakeUninitialized(size);
	if (!data) {
	return nullptr;
	}

	SkPixmap pm(info, data->writable_data(), rowBytes);
	if (!src->readPixels(pm, 0, 0, SkImage::kDisallow_CachingHint)) {
	return nullptr;
	}

	// Wrap them in a new image with a different color space
	return SkImage::MakeRasterData(info.makeColorSpace(sk_ref_sp(colorSpace)), data, rowBytes);
	}