| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkImage_Gpu_DEFINED |
| #define SkImage_Gpu_DEFINED |
| |
| #include "include/private/SkSpinlock.h" |
| #include "src/core/SkImagePriv.h" |
| #include "src/gpu/GrGpuResourcePriv.h" |
| #include "src/gpu/GrSurfaceProxyPriv.h" |
| #include "src/gpu/GrSurfaceProxyView.h" |
| #include "src/image/SkImage_GpuBase.h" |
| |
| class GrDirectContext; |
| class GrRecordingContext; |
| class GrTexture; |
| |
| class SkBitmap; |
| |
| class SkImage_Gpu final : public SkImage_GpuBase { |
| public: |
| SkImage_Gpu(sk_sp<GrImageContext> context, |
| uint32_t uniqueID, |
| GrSurfaceProxyView view, |
| SkColorInfo info); |
| |
| static sk_sp<SkImage> MakeWithVolatileSrc(sk_sp<GrRecordingContext> rContext, |
| GrSurfaceProxyView volatileSrc, |
| SkColorInfo colorInfo); |
| |
| ~SkImage_Gpu() override; |
| |
| // If this is image is a cached SkSurface snapshot then this method is called by the SkSurface |
| // before a write to check if the surface must make a copy to avoid modifying the image's |
| // contents. |
| bool surfaceMustCopyOnWrite(GrSurfaceProxy* surfaceProxy) const; |
| |
| bool onHasMipmaps() const override; |
| |
| GrSemaphoresSubmitted onFlush(GrDirectContext*, const GrFlushInfo&) override; |
| |
| GrBackendTexture onGetBackendTexture(bool flushPendingGrContextIO, |
| GrSurfaceOrigin* origin) const final; |
| |
| bool onIsTextureBacked() const override { return true; } |
| |
| size_t onTextureSize() const override; |
| |
| sk_sp<SkImage> onMakeColorTypeAndColorSpace(SkColorType, sk_sp<SkColorSpace>, |
| GrDirectContext*) const final; |
| |
| sk_sp<SkImage> onReinterpretColorSpace(sk_sp<SkColorSpace>) const final; |
| |
| void onAsyncRescaleAndReadPixels(const SkImageInfo&, |
| const SkIRect& srcRect, |
| RescaleGamma, |
| RescaleMode, |
| ReadPixelsCallback, |
| ReadPixelsContext) override; |
| |
| void onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace, |
| sk_sp<SkColorSpace>, |
| const SkIRect& srcRect, |
| const SkISize& dstSize, |
| RescaleGamma, |
| RescaleMode, |
| ReadPixelsCallback, |
| ReadPixelsContext) override; |
| |
| void generatingSurfaceIsDeleted() override; |
| |
| private: |
| SkImage_Gpu(sk_sp<GrDirectContext>, |
| GrSurfaceProxyView volatileSrc, |
| sk_sp<GrSurfaceProxy> stableCopy, |
| sk_sp<GrRenderTask> copyTask, |
| int volatileSrcTargetCount, |
| SkColorInfo); |
| |
| std::tuple<GrSurfaceProxyView, GrColorType> onAsView(GrRecordingContext*, |
| GrMipmapped, |
| GrImageTexGenPolicy) const override; |
| |
| std::unique_ptr<GrFragmentProcessor> onAsFragmentProcessor(GrRecordingContext*, |
| SkSamplingOptions, |
| const SkTileMode[], |
| const SkMatrix&, |
| const SkRect*, |
| const SkRect*) const override; |
| |
| GrSurfaceProxyView makeView(GrRecordingContext*) const; |
| |
| // Thread-safe wrapper around the proxies backing this image. Handles dynamically switching |
| // from a "volatile" proxy that may be overwritten (by an SkSurface that this image was snapped |
| // from) to a "stable" proxy that is a copy of the volatile proxy. It allows the image to cancel |
| // the copy if the stable proxy is never required because the contents of the volatile proxy |
| // were never mutated by the SkSurface during the image lifetime. |
| class ProxyChooser { |
| public: |
| ProxyChooser(sk_sp<GrSurfaceProxy> stableProxy, |
| sk_sp<GrSurfaceProxy> volatileProxy, |
| sk_sp<GrRenderTask> copyTask, |
| int volatileProxyTargetCount); |
| |
| ProxyChooser(sk_sp<GrSurfaceProxy> stableProxy); |
| |
| ~ProxyChooser(); |
| |
| // Checks if there is a volatile proxy that is safe to use. If so returns it, otherwise |
| // returns the stable proxy (and drops the volatile one if it exists). |
| sk_sp<GrSurfaceProxy> chooseProxy(GrRecordingContext* context) SK_EXCLUDES(fLock); |
| // Call when it is known copy is necessary. |
| sk_sp<GrSurfaceProxy> switchToStableProxy() SK_EXCLUDES(fLock); |
| // Call when it is known for sure copy won't be necessary. |
| sk_sp<GrSurfaceProxy> makeVolatileProxyStable() SK_EXCLUDES(fLock); |
| |
| bool surfaceMustCopyOnWrite(GrSurfaceProxy* surfaceProxy) const SK_EXCLUDES(fLock); |
| |
| // Queries that should be independent of which proxy is in use. |
| size_t gpuMemorySize() const SK_EXCLUDES(fLock); |
| GrMipmapped mipmapped() const SK_EXCLUDES(fLock); |
| #ifdef SK_DEBUG |
| GrBackendFormat backendFormat() SK_EXCLUDES(fLock); |
| #endif |
| |
| private: |
| mutable SkSpinlock fLock; |
| sk_sp<GrSurfaceProxy> fStableProxy SK_GUARDED_BY(fLock); |
| sk_sp<GrSurfaceProxy> fVolatileProxy SK_GUARDED_BY(fLock); |
| sk_sp<GrRenderTask> fVolatileToStableCopyTask; |
| // The number of GrRenderTasks targeting the volatile proxy at creation time. If the |
| // proxy's target count increases it indicates additional writes and we must switch |
| // to using the stable copy. |
| const int fVolatileProxyTargetCount = 0; |
| }; |
| |
| mutable ProxyChooser fChooser; |
| GrSwizzle fSwizzle; |
| GrSurfaceOrigin fOrigin; |
| |
| using INHERITED = SkImage_GpuBase; |
| }; |
| |
| #endif |