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 "SkData.h"
 #include "SkImageEncoder.h"
 #include "SkImageGenerator.h"
 #include "SkImagePriv.h"
 #include "SkImageShader.h"
 #include "SkImage_Base.h"
 #include "SkNextID.h"
 #include "SkPixelRef.h"
 #include "SkPixelSerializer.h"
 #include "SkReadPixelsRec.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);
 }

 const void* SkImage::peekPixels(SkImageInfo* info, size_t* rowBytes) const {
     SkImageInfo infoStorage;
     size_t rowBytesStorage;
     if (nullptr == info) {
         info = &infoStorage;
     }
     if (nullptr == rowBytes) {
         rowBytes = &rowBytesStorage;
     }
     return as_IB(this)->onPeekPixels(info, rowBytes);
 }

 bool SkImage::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
                            int srcX, int srcY, CachingHint chint) const {
     SkReadPixelsRec rec(dstInfo, dstPixels, dstRowBytes, srcX, srcY);
     if (!rec.trim(this->width(), this->height())) {
         return false;
     }
     return as_IB(this)->onReadPixels(rec.fInfo, rec.fPixels, rec.fRowBytes, rec.fX, rec.fY, 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, chint)) {
         bm.lockPixels();
         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;
 }

 void SkImage::preroll(GrContext* ctx) const {
     // For now, and to maintain parity w/ previous pixelref behavior, we just force the image
     // to produce a cached raster-bitmap form, so that drawing to a raster canvas should be fast.
     //
     SkBitmap bm;
     if (as_IB(this)->getROPixels(&bm)) {
         bm.lockPixels();
         bm.unlockPixels();
     }
 }

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

 SkShader* SkImage::newShader(SkShader::TileMode tileX,
                              SkShader::TileMode tileY,
                              const SkMatrix* localMatrix) const {
     return SkImageShader::Create(this, tileX, tileY, localMatrix);
 }

 SkData* SkImage::encode(SkImageEncoder::Type type, int quality) const {
     SkBitmap bm;
     if (as_IB(this)->getROPixels(&bm)) {
         return SkImageEncoder::EncodeData(bm, type, quality);
     }
     return nullptr;
 }

 SkData* SkImage::encode(SkPixelSerializer* serializer) const {
     SkAutoTUnref<SkPixelSerializer> defaultSerializer;
     SkPixelSerializer* effectiveSerializer = serializer;
     if (!effectiveSerializer) {
         defaultSerializer.reset(SkImageEncoder::CreatePixelSerializer());
         SkASSERT(defaultSerializer.get());
         effectiveSerializer = defaultSerializer.get();
     }
     SkAutoTUnref<SkData> encoded(this->refEncoded());
     if (encoded && effectiveSerializer->useEncodedData(encoded->data(), encoded->size())) {
         return encoded.detach();
     }

     SkBitmap bm;
     SkAutoPixmapUnlock apu;
     if (as_IB(this)->getROPixels(&bm) && bm.requestLock(&apu)) {
         return effectiveSerializer->encode(apu.pixmap());
     }

     return nullptr;
 }

 SkData* SkImage::refEncoded() const {
     GrContext* ctx = nullptr;   // should we allow the caller to pass in a ctx?
     return as_IB(this)->onRefEncoded(ctx);
 }

 SkImage* SkImage::NewFromEncoded(SkData* encoded, const SkIRect* subset) {
     if (nullptr == encoded || 0 == encoded->size()) {
         return nullptr;
     }
     SkImageGenerator* generator = SkImageGenerator::NewFromEncoded(encoded);
     return generator ? SkImage::NewFromGenerator(generator, subset) : nullptr;
 }

 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();
 }

 SkImage* SkImage::newSubset(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 SkRef(const_cast<SkImage*>(this));
     }
     return as_IB(this)->onNewSubset(subset);
 }

 #if SK_SUPPORT_GPU

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

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

 GrBackendObject SkImage::getTextureHandle(bool flushPendingGrContextIO) const {
     GrTexture* texture = as_IB(this)->peekTexture();
     if (texture) {
         GrContext* context = texture->getContext();
         if (context) {
             if (flushPendingGrContextIO) {
                 context->prepareSurfaceForExternalIO(texture);
             }
         }
         return texture->getTextureHandle();
     }
     return 0;
 }

 #else

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

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

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

 #endif

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

 static bool raster_canvas_supports(const SkImageInfo& info) {
     switch (info.colorType()) {
         case kN32_SkColorType:
             return kUnpremul_SkAlphaType != info.alphaType();
         case kRGB_565_SkColorType:
             return true;
         case kAlpha_8_SkColorType:
             return true;
         default:
             break;
     }
     return false;
 }

 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_Base::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
                                 int srcX, int srcY, CachingHint) const {
     if (!raster_canvas_supports(dstInfo)) {
         return false;
     }

     SkBitmap bm;
     bm.installPixels(dstInfo, dstPixels, dstRowBytes);
     SkCanvas canvas(bm);

     SkPaint paint;
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     canvas.drawImage(this, -SkIntToScalar(srcX), -SkIntToScalar(srcY), &paint);

     return true;
 }

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

 bool SkImage::peekPixels(SkPixmap* pmap) const {
     SkImageInfo info;
     size_t rowBytes;
     const void* pixels = this->peekPixels(&info, &rowBytes);
     if (pixels) {
         if (pmap) {
             pmap->reset(info, pixels, rowBytes);
         }
         return true;
     }
     return false;
 }

 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);
 }

 #if SK_SUPPORT_GPU
 #include "GrTextureToYUVPlanes.h"
 #endif

 #include "SkRGBAToYUV.h"

 bool SkImage::readYUV8Planes(const SkISize sizes[3], void* const planes[3],
                              const size_t rowBytes[3], SkYUVColorSpace colorSpace) const {
 #if SK_SUPPORT_GPU
     if (GrTexture* texture = as_IB(this)->peekTexture()) {
         if (GrTextureToYUVPlanes(texture, sizes, planes, rowBytes, colorSpace)) {
             return true;
         }
     }
 #endif
     return SkRGBAToYUV(this, sizes, planes, rowBytes, colorSpace);
 }

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

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

 #if SK_SUPPORT_GPU
     if (GrTexture* tex = pr->getTexture()) {
         SkAutoTUnref<GrTexture> unrefCopy;
         if (!bm.isImmutable()) {
             tex = GrDeepCopyTexture(tex, SkBudgeted::kNo);
             if (nullptr == tex) {
                 return nullptr;
             }
             unrefCopy.reset(tex);
         }
         const SkImageInfo info = bm.info();
         return new SkImage_Gpu(info.width(), info.height(), bm.getGenerationID(), info.alphaType(),
                                tex, SkBudgeted::kNo);
     }
 #endif

     // This will check for immutable (share or copy)
     return SkNewImageFromRasterBitmap(bm);
 }

 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 = SkImageInfo::MakeN32(this->width(), this->height(),
                                     this->isOpaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
     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;
 }

 SkImage* SkImage::NewFromPicture(const SkPicture* picture, const SkISize& dimensions,
                                  const SkMatrix* matrix, const SkPaint* paint) {
     if (!picture) {
         return nullptr;
     }
     return NewFromGenerator(SkImageGenerator::NewFromPicture(dimensions, picture, matrix, paint));
 }

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

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

 #if !SK_SUPPORT_GPU

 SkImage* SkImage::NewFromTexture(GrContext*, const GrBackendTextureDesc&, SkAlphaType,
                                  TextureReleaseProc, ReleaseContext) {
     return nullptr;
 }

 SkImage* SkImage::NewFromAdoptedTexture(GrContext*, const GrBackendTextureDesc&, SkAlphaType) {
     return nullptr;
 }

 SkImage* SkImage::NewFromTextureCopy(GrContext*, const GrBackendTextureDesc&, SkAlphaType) {
     return nullptr;
 }

 SkImage* SkImage::newTextureImage(GrContext*) const {
     return nullptr;
 }

 #endif
	/*
	* 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 "SkData.h"
	#include "SkImageEncoder.h"
	#include "SkImageGenerator.h"
	#include "SkImagePriv.h"
	#include "SkImageShader.h"
	#include "SkImage_Base.h"
	#include "SkNextID.h"
	#include "SkPixelRef.h"
	#include "SkPixelSerializer.h"
	#include "SkReadPixelsRec.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);
	}

	const void* SkImage::peekPixels(SkImageInfo* info, size_t* rowBytes) const {
	SkImageInfo infoStorage;
	size_t rowBytesStorage;
	if (nullptr == info) {
	info = &infoStorage;
	}
	if (nullptr == rowBytes) {
	rowBytes = &rowBytesStorage;
	}
	return as_IB(this)->onPeekPixels(info, rowBytes);
	}

	bool SkImage::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
	int srcX, int srcY, CachingHint chint) const {
	SkReadPixelsRec rec(dstInfo, dstPixels, dstRowBytes, srcX, srcY);
	if (!rec.trim(this->width(), this->height())) {
	return false;
	}
	return as_IB(this)->onReadPixels(rec.fInfo, rec.fPixels, rec.fRowBytes, rec.fX, rec.fY, 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, chint)) {
	bm.lockPixels();
	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;
	}

	void SkImage::preroll(GrContext* ctx) const {
	// For now, and to maintain parity w/ previous pixelref behavior, we just force the image
	// to produce a cached raster-bitmap form, so that drawing to a raster canvas should be fast.
	//
	SkBitmap bm;
	if (as_IB(this)->getROPixels(&bm)) {
	bm.lockPixels();
	bm.unlockPixels();
	}
	}

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

	SkShader* SkImage::newShader(SkShader::TileMode tileX,
	SkShader::TileMode tileY,
	const SkMatrix* localMatrix) const {
	return SkImageShader::Create(this, tileX, tileY, localMatrix);
	}

	SkData* SkImage::encode(SkImageEncoder::Type type, int quality) const {
	SkBitmap bm;
	if (as_IB(this)->getROPixels(&bm)) {
	return SkImageEncoder::EncodeData(bm, type, quality);
	}
	return nullptr;
	}

	SkData* SkImage::encode(SkPixelSerializer* serializer) const {
	SkAutoTUnref<SkPixelSerializer> defaultSerializer;
	SkPixelSerializer* effectiveSerializer = serializer;
	if (!effectiveSerializer) {
	defaultSerializer.reset(SkImageEncoder::CreatePixelSerializer());
	SkASSERT(defaultSerializer.get());
	effectiveSerializer = defaultSerializer.get();
	}
	SkAutoTUnref<SkData> encoded(this->refEncoded());
	if (encoded && effectiveSerializer->useEncodedData(encoded->data(), encoded->size())) {
	return encoded.detach();
	}

	SkBitmap bm;
	SkAutoPixmapUnlock apu;
	if (as_IB(this)->getROPixels(&bm) && bm.requestLock(&apu)) {
	return effectiveSerializer->encode(apu.pixmap());
	}

	return nullptr;
	}

	SkData* SkImage::refEncoded() const {
	GrContext* ctx = nullptr; // should we allow the caller to pass in a ctx?
	return as_IB(this)->onRefEncoded(ctx);
	}

	SkImage* SkImage::NewFromEncoded(SkData* encoded, const SkIRect* subset) {
	if (nullptr == encoded \|\| 0 == encoded->size()) {
	return nullptr;
	}
	SkImageGenerator* generator = SkImageGenerator::NewFromEncoded(encoded);
	return generator ? SkImage::NewFromGenerator(generator, subset) : nullptr;
	}

	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();
	}

	SkImage* SkImage::newSubset(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 SkRef(const_cast<SkImage*>(this));
	}
	return as_IB(this)->onNewSubset(subset);
	}

	#if SK_SUPPORT_GPU

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

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

	GrBackendObject SkImage::getTextureHandle(bool flushPendingGrContextIO) const {
	GrTexture* texture = as_IB(this)->peekTexture();
	if (texture) {
	GrContext* context = texture->getContext();
	if (context) {
	if (flushPendingGrContextIO) {
	context->prepareSurfaceForExternalIO(texture);
	}
	}
	return texture->getTextureHandle();
	}
	return 0;
	}

	#else

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

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

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

	#endif

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

	static bool raster_canvas_supports(const SkImageInfo& info) {
	switch (info.colorType()) {
	case kN32_SkColorType:
	return kUnpremul_SkAlphaType != info.alphaType();
	case kRGB_565_SkColorType:
	return true;
	case kAlpha_8_SkColorType:
	return true;
	default:
	break;
	}
	return false;
	}

	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_Base::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
	int srcX, int srcY, CachingHint) const {
	if (!raster_canvas_supports(dstInfo)) {
	return false;
	}

	SkBitmap bm;
	bm.installPixels(dstInfo, dstPixels, dstRowBytes);
	SkCanvas canvas(bm);

	SkPaint paint;
	paint.setXfermodeMode(SkXfermode::kSrc_Mode);
	canvas.drawImage(this, -SkIntToScalar(srcX), -SkIntToScalar(srcY), &paint);

	return true;
	}

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

	bool SkImage::peekPixels(SkPixmap* pmap) const {
	SkImageInfo info;
	size_t rowBytes;
	const void* pixels = this->peekPixels(&info, &rowBytes);
	if (pixels) {
	if (pmap) {
	pmap->reset(info, pixels, rowBytes);
	}
	return true;
	}
	return false;
	}

	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);
	}

	#if SK_SUPPORT_GPU
	#include "GrTextureToYUVPlanes.h"
	#endif

	#include "SkRGBAToYUV.h"

	bool SkImage::readYUV8Planes(const SkISize sizes[3], void* const planes[3],
	const size_t rowBytes[3], SkYUVColorSpace colorSpace) const {
	#if SK_SUPPORT_GPU
	if (GrTexture* texture = as_IB(this)->peekTexture()) {
	if (GrTextureToYUVPlanes(texture, sizes, planes, rowBytes, colorSpace)) {
	return true;
	}
	}
	#endif
	return SkRGBAToYUV(this, sizes, planes, rowBytes, colorSpace);
	}

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

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

	#if SK_SUPPORT_GPU
	if (GrTexture* tex = pr->getTexture()) {
	SkAutoTUnref<GrTexture> unrefCopy;
	if (!bm.isImmutable()) {
	tex = GrDeepCopyTexture(tex, SkBudgeted::kNo);
	if (nullptr == tex) {
	return nullptr;
	}
	unrefCopy.reset(tex);
	}
	const SkImageInfo info = bm.info();
	return new SkImage_Gpu(info.width(), info.height(), bm.getGenerationID(), info.alphaType(),
	tex, SkBudgeted::kNo);
	}
	#endif

	// This will check for immutable (share or copy)
	return SkNewImageFromRasterBitmap(bm);
	}

	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 = SkImageInfo::MakeN32(this->width(), this->height(),
	this->isOpaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
	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;
	}

	SkImage* SkImage::NewFromPicture(const SkPicture* picture, const SkISize& dimensions,
	const SkMatrix* matrix, const SkPaint* paint) {
	if (!picture) {
	return nullptr;
	}
	return NewFromGenerator(SkImageGenerator::NewFromPicture(dimensions, picture, matrix, paint));
	}

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

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

	#if !SK_SUPPORT_GPU

	SkImage* SkImage::NewFromTexture(GrContext*, const GrBackendTextureDesc&, SkAlphaType,
	TextureReleaseProc, ReleaseContext) {
	return nullptr;
	}

	SkImage* SkImage::NewFromAdoptedTexture(GrContext*, const GrBackendTextureDesc&, SkAlphaType) {
	return nullptr;
	}

	SkImage* SkImage::NewFromTextureCopy(GrContext*, const GrBackendTextureDesc&, SkAlphaType) {
	return nullptr;
	}

	SkImage* SkImage::newTextureImage(GrContext*) const {
	return nullptr;
	}

	#endif