/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkBitmap.h"
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#include "SkBitmapCache.h"
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#include "SkCachedData.h"
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#include "SkCanvas.h"
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#include "SkColorSpacePriv.h"
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#include "SkData.h"
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#include "SkImageEncoder.h"
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#include "SkImageFilter.h"
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#include "SkImageFilterCache.h"
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#include "SkImageGenerator.h"
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#include "SkImagePriv.h"
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#include "SkImageShader.h"
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#include "SkImage_Base.h"
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#include "SkNextID.h"
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#include "SkPicture.h"
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#include "SkReadPixelsRec.h"
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#include "SkSpecialImage.h"
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#include "SkString.h"
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#include "SkSurface.h"
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#if SK_SUPPORT_GPU
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#include "GrTexture.h"
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#include "GrContext.h"
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#include "SkImage_Gpu.h"
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#endif
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#include "GrBackendSurface.h"
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SkImage::SkImage(int width, int height, uint32_t uniqueID)
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: fWidth(width)
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, fHeight(height)
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, fUniqueID(kNeedNewImageUniqueID == uniqueID ? SkNextID::ImageID() : uniqueID)
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{
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SkASSERT(width > 0);
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SkASSERT(height > 0);
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}
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bool SkImage::peekPixels(SkPixmap* pm) const {
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SkPixmap tmp;
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if (!pm) {
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pm = &tmp;
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}
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return as_IB(this)->onPeekPixels(pm);
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}
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bool SkImage::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
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int srcX, int srcY, CachingHint chint) const {
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return as_IB(this)->onReadPixels(dstInfo, dstPixels, dstRowBytes, srcX, srcY, chint);
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}
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bool SkImage::scalePixels(const SkPixmap& dst, SkFilterQuality quality, CachingHint chint) const {
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if (this->width() == dst.width() && this->height() == dst.height()) {
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return this->readPixels(dst, 0, 0, chint);
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}
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// Idea: If/when SkImageGenerator supports a native-scaling API (where the generator itself
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// can scale more efficiently) we should take advantage of it here.
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//
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SkBitmap bm;
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if (as_IB(this)->getROPixels(&bm, chint)) {
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SkPixmap pmap;
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// Note: By calling the pixmap scaler, we never cache the final result, so the chint
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// is (currently) only being applied to the getROPixels. If we get a request to
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// also attempt to cache the final (scaled) result, we would add that logic here.
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//
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return bm.peekPixels(&pmap) && pmap.scalePixels(dst, quality);
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}
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return false;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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SkColorType SkImage::colorType() const {
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return as_IB(this)->onImageInfo().colorType();
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}
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SkAlphaType SkImage::alphaType() const {
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return as_IB(this)->onImageInfo().alphaType();
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}
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SkColorSpace* SkImage::colorSpace() const {
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return as_IB(this)->onImageInfo().colorSpace();
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}
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sk_sp<SkColorSpace> SkImage::refColorSpace() const {
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return as_IB(this)->onImageInfo().refColorSpace();
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}
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sk_sp<SkShader> SkImage::makeShader(SkShader::TileMode tileX, SkShader::TileMode tileY,
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const SkMatrix* localMatrix) const {
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return SkImageShader::Make(sk_ref_sp(const_cast<SkImage*>(this)), tileX, tileY, localMatrix);
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}
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sk_sp<SkData> SkImage::encodeToData(SkEncodedImageFormat type, int quality) const {
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SkBitmap bm;
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if (as_IB(this)->getROPixels(&bm)) {
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return SkEncodeBitmap(bm, type, quality);
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}
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return nullptr;
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}
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sk_sp<SkData> SkImage::encodeToData() const {
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if (auto encoded = this->refEncodedData()) {
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return encoded;
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}
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return this->encodeToData(SkEncodedImageFormat::kPNG, 100);
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}
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sk_sp<SkData> SkImage::refEncodedData() const {
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return sk_sp<SkData>(as_IB(this)->onRefEncoded());
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}
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sk_sp<SkImage> SkImage::MakeFromEncoded(sk_sp<SkData> encoded, const SkIRect* subset) {
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if (nullptr == encoded || 0 == encoded->size()) {
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return nullptr;
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}
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return SkImage::MakeFromGenerator(SkImageGenerator::MakeFromEncoded(std::move(encoded)),
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subset);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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sk_sp<SkImage> SkImage::makeSubset(const SkIRect& subset) const {
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if (subset.isEmpty()) {
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return nullptr;
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}
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const SkIRect bounds = SkIRect::MakeWH(this->width(), this->height());
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if (!bounds.contains(subset)) {
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return nullptr;
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}
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// optimization : return self if the subset == our bounds
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if (bounds == subset) {
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return sk_ref_sp(const_cast<SkImage*>(this));
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}
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return as_IB(this)->onMakeSubset(subset);
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}
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#if SK_SUPPORT_GPU
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GrTexture* SkImage::getTexture() const {
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return as_IB(this)->onGetTexture();
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}
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bool SkImage::isTextureBacked() const { return as_IB(this)->onIsTextureBacked(); }
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GrBackendTexture SkImage::getBackendTexture(bool flushPendingGrContextIO,
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GrSurfaceOrigin* origin) const {
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return as_IB(this)->onGetBackendTexture(flushPendingGrContextIO, origin);
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}
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bool SkImage::isValid(GrContext* context) const {
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if (context && context->abandoned()) {
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return false;
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}
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return as_IB(this)->onIsValid(context);
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}
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#else
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GrTexture* SkImage::getTexture() const { return nullptr; }
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bool SkImage::isTextureBacked() const { return false; }
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GrBackendTexture SkImage::getBackendTexture(bool flushPendingGrContextIO,
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GrSurfaceOrigin* origin) const {
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return GrBackendTexture(); // invalid
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}
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bool SkImage::isValid(GrContext* context) const {
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if (context) {
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return false;
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}
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return as_IB(this)->onIsValid(context);
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}
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#endif
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///////////////////////////////////////////////////////////////////////////////
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SkImage_Base::SkImage_Base(int width, int height, uint32_t uniqueID)
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: INHERITED(width, height, uniqueID)
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, fAddedToRasterCache(false)
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{}
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SkImage_Base::~SkImage_Base() {
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if (fAddedToRasterCache.load()) {
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SkNotifyBitmapGenIDIsStale(this->uniqueID());
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}
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}
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GrBackendTexture SkImage_Base::onGetBackendTexture(bool flushPendingGrContextIO,
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GrSurfaceOrigin* origin) const {
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return GrBackendTexture(); // invalid
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}
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bool SkImage::readPixels(const SkPixmap& pmap, int srcX, int srcY, CachingHint chint) const {
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return this->readPixels(pmap.info(), pmap.writable_addr(), pmap.rowBytes(), srcX, srcY, chint);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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sk_sp<SkImage> SkImage::MakeFromBitmap(const SkBitmap& bm) {
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if (!bm.pixelRef()) {
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return nullptr;
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}
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return SkMakeImageFromRasterBitmap(bm, kIfMutable_SkCopyPixelsMode);
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}
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bool SkImage::asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode ) const {
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return as_IB(this)->onAsLegacyBitmap(bitmap);
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}
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sk_sp<SkCachedData> SkImage_Base::getPlanes(SkYUVASizeInfo*, SkYUVAIndex[4],
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SkYUVColorSpace*, const void*[4]) {
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return nullptr;
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}
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bool SkImage_Base::onAsLegacyBitmap(SkBitmap* bitmap) const {
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// As the base-class, all we can do is make a copy (regardless of mode).
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// Subclasses that want to be more optimal should override.
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SkImageInfo info = this->onImageInfo().makeColorType(kN32_SkColorType).makeColorSpace(nullptr);
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if (!bitmap->tryAllocPixels(info)) {
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return false;
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}
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if (!this->readPixels(bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(), 0, 0)) {
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bitmap->reset();
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return false;
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}
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bitmap->setImmutable();
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return true;
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}
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sk_sp<SkImage> SkImage::MakeFromPicture(sk_sp<SkPicture> picture, const SkISize& dimensions,
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const SkMatrix* matrix, const SkPaint* paint,
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BitDepth bitDepth, sk_sp<SkColorSpace> colorSpace) {
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return MakeFromGenerator(SkImageGenerator::MakeFromPicture(dimensions, std::move(picture),
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matrix, paint, bitDepth,
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std::move(colorSpace)));
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}
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sk_sp<SkImage> SkImage::makeWithFilter(const SkImageFilter* filter, const SkIRect& subset,
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const SkIRect& clipBounds, SkIRect* outSubset,
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SkIPoint* offset) const {
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GrContext* context = as_IB(this)->context();
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return this->makeWithFilter(context, filter, subset, clipBounds, outSubset, offset);
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}
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sk_sp<SkImage> SkImage::makeWithFilter(GrContext* grContext,
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const SkImageFilter* filter, const SkIRect& subset,
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const SkIRect& clipBounds, SkIRect* outSubset,
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SkIPoint* offset) const {
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if (!filter || !outSubset || !offset || !this->bounds().contains(subset)) {
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return nullptr;
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}
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sk_sp<SkSpecialImage> srcSpecialImage = SkSpecialImage::MakeFromImage(
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grContext, subset, sk_ref_sp(const_cast<SkImage*>(this)));
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if (!srcSpecialImage) {
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return nullptr;
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}
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sk_sp<SkImageFilterCache> cache(
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SkImageFilterCache::Create(SkImageFilterCache::kDefaultTransientSize));
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SkImageFilter::OutputProperties outputProperties(as_IB(this)->onImageInfo().colorType(),
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as_IB(this)->onImageInfo().colorSpace());
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SkImageFilter::Context context(SkMatrix::I(), clipBounds, cache.get(), outputProperties);
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sk_sp<SkSpecialImage> result = filter->filterImage(srcSpecialImage.get(), context, offset);
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if (!result) {
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return nullptr;
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}
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*outSubset = SkIRect::MakeWH(result->width(), result->height());
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if (!outSubset->intersect(clipBounds.makeOffset(-offset->x(), -offset->y()))) {
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return nullptr;
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}
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offset->fX += outSubset->x();
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offset->fY += outSubset->y();
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// Note that here we're returning the special image's entire backing store, loose padding
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// and all!
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return result->asImage();
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}
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bool SkImage::isLazyGenerated() const {
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return as_IB(this)->onIsLazyGenerated();
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}
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bool SkImage::isAlphaOnly() const {
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return as_IB(this)->onImageInfo().colorType() == kAlpha_8_SkColorType;
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}
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sk_sp<SkImage> SkImage::makeColorSpace(sk_sp<SkColorSpace> target) const {
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if (!target) {
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return nullptr;
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}
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// No need to create a new image if:
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// (1) The color spaces are equal.
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// (2) The color type is kAlpha8.
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SkColorSpace* colorSpace = this->colorSpace();
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if (!colorSpace) {
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colorSpace = sk_srgb_singleton();
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}
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if (SkColorSpace::Equals(colorSpace, target.get()) || this->isAlphaOnly()) {
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return sk_ref_sp(const_cast<SkImage*>(this));
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}
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return as_IB(this)->onMakeColorTypeAndColorSpace(this->colorType(), std::move(target));
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}
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sk_sp<SkImage> SkImage::makeColorTypeAndColorSpace(SkColorType targetColorType,
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sk_sp<SkColorSpace> targetColorSpace) const {
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if (kUnknown_SkColorType == targetColorType || !targetColorSpace) {
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return nullptr;
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}
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SkColorType colorType = this->colorType();
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SkColorSpace* colorSpace = this->colorSpace();
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if (!colorSpace) {
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colorSpace = sk_srgb_singleton();
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}
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if (colorType == targetColorType &&
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(SkColorSpace::Equals(colorSpace, targetColorSpace.get()) || this->isAlphaOnly())) {
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return sk_ref_sp(const_cast<SkImage*>(this));
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}
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return as_IB(this)->onMakeColorTypeAndColorSpace(targetColorType, std::move(targetColorSpace));
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}
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sk_sp<SkImage> SkImage::makeNonTextureImage() const {
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if (!this->isTextureBacked()) {
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return sk_ref_sp(const_cast<SkImage*>(this));
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}
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return this->makeRasterImage();
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}
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sk_sp<SkImage> SkImage::makeRasterImage() const {
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SkPixmap pm;
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if (this->peekPixels(&pm)) {
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return sk_ref_sp(const_cast<SkImage*>(this));
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}
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const SkImageInfo info = as_IB(this)->onImageInfo();
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const size_t rowBytes = info.minRowBytes();
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size_t size = info.computeByteSize(rowBytes);
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if (SkImageInfo::ByteSizeOverflowed(size)) {
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return nullptr;
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}
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sk_sp<SkData> data = SkData::MakeUninitialized(size);
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pm = { info.makeColorSpace(nullptr), data->writable_data(), info.minRowBytes() };
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if (!this->readPixels(pm, 0, 0)) {
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return nullptr;
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}
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return SkImage::MakeRasterData(info, std::move(data), rowBytes);
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}
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//////////////////////////////////////////////////////////////////////////////////////
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#if !SK_SUPPORT_GPU
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sk_sp<SkImage> SkImage::MakeFromTexture(GrContext* ctx,
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const GrBackendTexture& tex, GrSurfaceOrigin origin,
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SkColorType ct, SkAlphaType at, sk_sp<SkColorSpace> cs,
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TextureReleaseProc releaseP, ReleaseContext releaseC) {
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return nullptr;
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}
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bool SkImage::MakeBackendTextureFromSkImage(GrContext*,
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sk_sp<SkImage>,
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GrBackendTexture*,
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BackendTextureReleaseProc*) {
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return false;
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}
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sk_sp<SkImage> SkImage::MakeFromAdoptedTexture(GrContext* ctx,
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const GrBackendTexture& tex, GrSurfaceOrigin origin,
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SkColorType ct, SkAlphaType at,
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sk_sp<SkColorSpace> cs) {
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return nullptr;
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}
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sk_sp<SkImage> SkImage::MakeFromYUVATexturesCopy(GrContext* context,
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SkYUVColorSpace yuvColorSpace,
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const GrBackendTexture yuvaTextures[],
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const SkYUVAIndex yuvaIndices[4],
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SkISize imageSize,
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GrSurfaceOrigin imageOrigin,
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sk_sp<SkColorSpace> imageColorSpace) {
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return nullptr;
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}
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sk_sp<SkImage> SkImage::MakeFromYUVATexturesCopyWithExternalBackend(
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GrContext* context,
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SkYUVColorSpace yuvColorSpace,
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const GrBackendTexture yuvaTextures[],
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const SkYUVAIndex yuvaIndices[4],
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SkISize imageSize,
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GrSurfaceOrigin imageOrigin,
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const GrBackendTexture& backendTexture,
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sk_sp<SkColorSpace> imageColorSpace) {
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return nullptr;
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}
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sk_sp<SkImage> SkImage::MakeFromYUVTexturesCopy(GrContext* ctx, SkYUVColorSpace space,
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const GrBackendTexture[3],
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GrSurfaceOrigin origin,
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sk_sp<SkColorSpace> imageColorSpace) {
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return nullptr;
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}
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sk_sp<SkImage> SkImage::MakeFromYUVTexturesCopyWithExternalBackend(
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GrContext* context, SkYUVColorSpace yuvColorSpace, const GrBackendTexture yuvTextures[3],
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GrSurfaceOrigin surfaceOrigin, const GrBackendTexture& backendTexture,
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sk_sp<SkColorSpace> colorSpace) {
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return nullptr;
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}
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sk_sp<SkImage> SkImage::MakeFromNV12TexturesCopy(GrContext* ctx, SkYUVColorSpace space,
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const GrBackendTexture[2],
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GrSurfaceOrigin origin,
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sk_sp<SkColorSpace> imageColorSpace) {
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return nullptr;
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}
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sk_sp<SkImage> SkImage::makeTextureImage(GrContext*, SkColorSpace* dstColorSpace,
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GrMipMapped mipMapped) const {
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return nullptr;
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}
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sk_sp<SkImage> MakeFromNV12TexturesCopyWithExternalBackend(GrContext* context,
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SkYUVColorSpace yuvColorSpace,
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const GrBackendTexture nv12Textures[2],
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GrSurfaceOrigin surfaceOrigin,
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const GrBackendTexture& backendTexture,
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sk_sp<SkColorSpace> colorSpace) {
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return nullptr;
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}
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#endif
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///////////////////////////////////////////////////////////////////////////////////////////////////
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bool SkImage_pinAsTexture(const SkImage* image, GrContext* ctx) {
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SkASSERT(image);
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SkASSERT(ctx);
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return as_IB(image)->onPinAsTexture(ctx);
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}
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void SkImage_unpinAsTexture(const SkImage* image, GrContext* ctx) {
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SkASSERT(image);
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SkASSERT(ctx);
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as_IB(image)->onUnpinAsTexture(ctx);
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}
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SkIRect SkImage_getSubset(const SkImage* image) {
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SkASSERT(image);
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return as_IB(image)->onGetSubset();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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sk_sp<SkImage> SkImageMakeRasterCopyAndAssignColorSpace(const SkImage* src,
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SkColorSpace* colorSpace) {
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// Read the pixels out of the source image, with no conversion
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SkImageInfo info = as_IB(src)->onImageInfo();
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if (kUnknown_SkColorType == info.colorType()) {
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SkDEBUGFAIL("Unexpected color type");
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return nullptr;
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}
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size_t rowBytes = info.minRowBytes();
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size_t size = info.computeByteSize(rowBytes);
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if (SkImageInfo::ByteSizeOverflowed(size)) {
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return nullptr;
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}
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auto data = SkData::MakeUninitialized(size);
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if (!data) {
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return nullptr;
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}
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SkPixmap pm(info, data->writable_data(), rowBytes);
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if (!src->readPixels(pm, 0, 0, SkImage::kDisallow_CachingHint)) {
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return nullptr;
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}
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// Wrap them in a new image with a different color space
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return SkImage::MakeRasterData(info.makeColorSpace(sk_ref_sp(colorSpace)), data, rowBytes);
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}
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