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* Copyright 2012 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkImage_Base_DEFINED
#define SkImage_Base_DEFINED
#include "include/core/SkData.h"
#include "include/core/SkImage.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkTypes.h"
#include "src/core/SkMipmap.h"
#include <atomic>
#include <cstddef>
#include <cstdint>
class GrDirectContext;
class GrImageContext;
class SkBitmap;
class SkColorSpace;
class SkPixmap;
enum SkColorType : int;
enum SkYUVColorSpace : int;
struct SkIRect;
struct SkISize;
struct SkImageInfo;
enum {
kNeedNewImageUniqueID = 0
namespace skgpu { namespace graphite { class Recorder; } }
class SkImage_Base : public SkImage {
~SkImage_Base() override;
// From SkImage.h
sk_sp<SkImage> makeColorSpace(GrDirectContext*, sk_sp<SkColorSpace>) const override;
sk_sp<SkImage> makeColorSpace(skgpu::graphite::Recorder*,
RequiredProperties) const override;
sk_sp<SkImage> makeColorTypeAndColorSpace(GrDirectContext* dContext,
SkColorType targetColorType,
sk_sp<SkColorSpace> targetCS) const override;
sk_sp<SkImage> makeColorTypeAndColorSpace(skgpu::graphite::Recorder*,
RequiredProperties) const override;
sk_sp<SkImage> makeSubset(GrDirectContext* direct, const SkIRect& subset) const override;
sk_sp<SkImage> makeSubset(skgpu::graphite::Recorder*,
const SkIRect&,
RequiredProperties) const override;
size_t textureSize() const override { return 0; }
// Methods that we want to use elsewhere in Skia, but not be a part of the public API.
virtual bool onPeekPixels(SkPixmap*) const { return false; }
virtual const SkBitmap* onPeekBitmap() const { return nullptr; }
virtual bool onReadPixels(GrDirectContext*,
const SkImageInfo& dstInfo,
void* dstPixels,
size_t dstRowBytes,
int srcX,
int srcY,
CachingHint) const = 0;
virtual bool onReadPixelsGraphite(skgpu::graphite::Recorder*,
const SkPixmap& dst,
int srcX,
int srcY) const { return false; }
virtual bool onHasMipmaps() const = 0;
virtual bool onIsProtected() const = 0;
virtual SkMipmap* onPeekMips() const { return nullptr; }
sk_sp<SkMipmap> refMips() const {
return sk_ref_sp(this->onPeekMips());
* Default implementation does a rescale/read and then calls the callback.
virtual void onAsyncRescaleAndReadPixels(const SkImageInfo&,
SkIRect srcRect,
ReadPixelsContext) const;
* Default implementation does a rescale/read/yuv conversion and then calls the callback.
virtual void onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace,
bool readAlpha,
sk_sp<SkColorSpace> dstColorSpace,
SkIRect srcRect,
SkISize dstSize,
ReadPixelsContext) const;
virtual GrImageContext* context() const { return nullptr; }
/** this->context() try-casted to GrDirectContext. Useful for migrations – avoid otherwise! */
virtual GrDirectContext* directContext() const { return nullptr; }
// If this image is the current cached image snapshot of a surface then this is called when the
// surface is destroyed to indicate no further writes may happen to surface backing store.
virtual void generatingSurfaceIsDeleted() {}
// return a read-only copy of the pixels. We promise to not modify them,
// but only inspect them (or encode them).
virtual bool getROPixels(GrDirectContext*, SkBitmap*,
CachingHint = kAllow_CachingHint) const = 0;
virtual sk_sp<SkImage> onMakeSubset(GrDirectContext*, const SkIRect&) const = 0;
virtual sk_sp<SkData> onRefEncoded() const { return nullptr; }
virtual bool onAsLegacyBitmap(GrDirectContext*, SkBitmap*) const;
enum class Type {
virtual Type type() const = 0;
// True for picture-backed and codec-backed
bool isLazyGenerated() const override {
return this->type() == Type::kLazy || this->type() == Type::kLazyPicture;
bool isRasterBacked() const {
return this->type() == Type::kRaster || this->type() == Type::kRasterPinnable;
// True for images instantiated by Ganesh in GPU memory
bool isGaneshBacked() const {
return this->type() == Type::kGanesh || this->type() == Type::kGaneshYUVA;
// True for images instantiated by Graphite in GPU memory
bool isGraphiteBacked() const {
return this->type() == Type::kGraphite || this->type() == Type::kGraphiteYUVA;
bool isYUVA() const {
return this->type() == Type::kGaneshYUVA || this->type() == Type::kGraphiteYUVA;
bool isTextureBacked() const override {
return this->isGaneshBacked() || this->isGraphiteBacked();
// Call when this image is part of the key to a resourcecache entry. This allows the cache
// to know automatically those entries can be purged when this SkImage deleted.
virtual void notifyAddedToRasterCache() const {;
virtual sk_sp<SkImage> onMakeColorTypeAndColorSpace(SkColorType, sk_sp<SkColorSpace>,
GrDirectContext*) const = 0;
virtual sk_sp<SkImage> onReinterpretColorSpace(sk_sp<SkColorSpace>) const = 0;
// on failure, returns nullptr
// NOLINTNEXTLINE(performance-unnecessary-value-param)
virtual sk_sp<SkImage> onMakeWithMipmaps(sk_sp<SkMipmap>) const {
return nullptr;
virtual sk_sp<SkImage> onMakeSubset(skgpu::graphite::Recorder*,
const SkIRect&,
RequiredProperties) const = 0;
SkImage_Base(const SkImageInfo& info, uint32_t uniqueID);
// Set true by caches when they cache content that's derived from the current pixels.
mutable std::atomic<bool> fAddedToRasterCache;
static inline SkImage_Base* as_IB(SkImage* image) {
return static_cast<SkImage_Base*>(image);
static inline SkImage_Base* as_IB(const sk_sp<SkImage>& image) {
return static_cast<SkImage_Base*>(image.get());
static inline const SkImage_Base* as_IB(const SkImage* image) {
return static_cast<const SkImage_Base*>(image);
static inline const SkImage_Base* as_IB(const sk_sp<const SkImage>& image) {
return static_cast<const SkImage_Base*>(image.get());