/* * Copyright 2017 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #ifndef GrAHardwareBufferImageGenerator_DEFINED #define GrAHardwareBufferImageGenerator_DEFINED #include "include/core/SkImageGenerator.h" #include "include/private/GrTypesPriv.h" class GrGpuResource; extern "C" { typedef struct AHardwareBuffer AHardwareBuffer; } /** * GrAHardwareBufferImageGenerator allows to create an SkImage attached to * an existing android native hardware buffer. A hardware buffer has to be * created with AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE usage, because it is * bound to an external texture using an EGLImage. The image generator will * keep a reference to the hardware buffer for its lifetime. A hardware buffer * can be shared between processes and same buffer can be used in multiple GPU * contexts. * To implement certain features like tiling, Skia may copy the texture to * avoid OpenGL API limitations. */ class GrAHardwareBufferImageGenerator : public SkImageGenerator { public: static std::unique_ptr Make(AHardwareBuffer*, SkAlphaType, sk_sp, GrSurfaceOrigin); ~GrAHardwareBufferImageGenerator() override; static void DeleteGLTexture(void* ctx); protected: bool onIsValid(GrContext*) const override; TexGenType onCanGenerateTexture() const override { return TexGenType::kCheap; } sk_sp onGenerateTexture(GrRecordingContext*, const SkImageInfo&, const SkIPoint&, bool willNeedMipMaps) override; private: GrAHardwareBufferImageGenerator(const SkImageInfo&, AHardwareBuffer*, SkAlphaType, bool isProtectedContent, uint32_t bufferFormat, GrSurfaceOrigin surfaceOrigin); sk_sp makeProxy(GrRecordingContext* context); void releaseTextureRef(); static void ReleaseRefHelper_TextureReleaseProc(void* ctx); AHardwareBuffer* fHardwareBuffer; uint32_t fBufferFormat; const bool fIsProtectedContent; GrSurfaceOrigin fSurfaceOrigin; typedef SkImageGenerator INHERITED; }; #endif // GrAHardwareBufferImageGenerator_DEFINED