blob: 33b20db54631da4fb70416cd19e7002f8a5ddef0 [file] [log] [blame]
* Copyright 2018 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkImage_Lazy_DEFINED
#define SkImage_Lazy_DEFINED
#include "include/private/SkIDChangeListener.h"
#include "include/private/SkMutex.h"
#include "src/image/SkImage_Base.h"
#include "include/core/SkYUVAPixmaps.h"
#include "src/gpu/GrTextureMaker.h"
class SharedGenerator;
class SkImage_Lazy : public SkImage_Base {
struct Validator {
Validator(sk_sp<SharedGenerator>, const SkColorType*, sk_sp<SkColorSpace>);
operator bool() const { return fSharedGenerator.get(); }
sk_sp<SharedGenerator> fSharedGenerator;
SkImageInfo fInfo;
sk_sp<SkColorSpace> fColorSpace;
uint32_t fUniqueID;
SkImage_Lazy(Validator* validator);
bool onHasMipmaps() const override {
// TODO: Should we defer to the generator? The generator interface currently doesn't have
// a way to provide content for levels other than via SkImageGenerator::generateTexture().
return false;
bool onReadPixels(GrDirectContext*, const SkImageInfo&, void*, size_t, int srcX, int srcY,
CachingHint) const override;
sk_sp<SkData> onRefEncoded() const override;
sk_sp<SkImage> onMakeSubset(const SkIRect&, GrDirectContext*) const override;
bool getROPixels(GrDirectContext*, SkBitmap*, CachingHint) const override;
bool onIsLazyGenerated() const override { return true; }
sk_sp<SkImage> onMakeColorTypeAndColorSpace(SkColorType, sk_sp<SkColorSpace>,
GrDirectContext*) const override;
sk_sp<SkImage> onReinterpretColorSpace(sk_sp<SkColorSpace>) const final;
bool onIsValid(GrRecordingContext*) const override;
// Returns the texture proxy. CachingHint refers to whether the generator's output should be
// cached in CPU memory. We will always cache the generated texture on success.
GrSurfaceProxyView lockTextureProxyView(GrRecordingContext*,
GrMipmapped) const;
// Returns the GrColorType to use with the GrTextureProxy returned from lockTextureProxy. This
// may be different from the color type on the image in the case where we need up upload CPU
// data to a texture but the GPU doesn't support the format of CPU data. In this case we convert
// the data to RGBA_8888 unorm on the CPU then upload that.
GrColorType colorTypeOfLockTextureProxy(const GrCaps* caps) const;
void addUniqueIDListener(sk_sp<SkIDChangeListener>) const;
std::tuple<GrSurfaceProxyView, GrColorType> onAsView(GrRecordingContext*,
GrImageTexGenPolicy) const override;
GrSurfaceProxyView textureProxyViewFromPlanes(GrRecordingContext*, SkBudgeted) const;
sk_sp<SkCachedData> getPlanes(const SkYUVAPixmapInfo::SupportedDataTypes& supportedDataTypes,
SkYUVAPixmaps* pixmaps) const;
class ScopedGenerator;
// Note that this->imageInfo() is not necessarily the info from the generator. It may be
// cropped by onMakeSubset and its color type/space may be changed by
// onMakeColorTypeAndColorSpace.
sk_sp<SharedGenerator> fSharedGenerator;
// Repeated calls to onMakeColorTypeAndColorSpace will result in a proliferation of unique IDs
// and SkImage_Lazy instances. Cache the result of the last successful call.
mutable SkMutex fOnMakeColorTypeAndSpaceMutex;
mutable sk_sp<SkImage> fOnMakeColorTypeAndSpaceResult;
// When the SkImage_Lazy goes away, we will iterate over all the listeners to inform them
// of the unique ID's demise. This is used to remove cached textures from GrContext.
mutable SkIDChangeListener::List fUniqueIDListeners;
using INHERITED = SkImage_Base;