1 /* 2 * Copyright 2017 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 #ifndef GrAHardwareBufferImageGenerator_DEFINED 8 #define GrAHardwareBufferImageGenerator_DEFINED 9 10 #include "include/core/SkImageGenerator.h" 11 12 #include "include/private/GrTypesPriv.h" 13 14 class GrGpuResource; 15 16 extern "C" { 17 typedef struct AHardwareBuffer AHardwareBuffer; 18 } 19 20 /** 21 * GrAHardwareBufferImageGenerator allows to create an SkImage attached to 22 * an existing android native hardware buffer. A hardware buffer has to be 23 * created with AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE usage, because it is 24 * bound to an external texture using an EGLImage. The image generator will 25 * keep a reference to the hardware buffer for its lifetime. A hardware buffer 26 * can be shared between processes and same buffer can be used in multiple GPU 27 * contexts. 28 * To implement certain features like tiling, Skia may copy the texture to 29 * avoid OpenGL API limitations. 30 */ 31 class GrAHardwareBufferImageGenerator : public SkImageGenerator { 32 public: 33 static std::unique_ptr<SkImageGenerator> Make(AHardwareBuffer*, SkAlphaType, 34 sk_sp<SkColorSpace>, GrSurfaceOrigin); 35 36 ~GrAHardwareBufferImageGenerator() override; 37 38 static void DeleteGLTexture(void* ctx); 39 40 protected: 41 42 bool onIsValid(GrContext*) const override; 43 onCanGenerateTexture()44 TexGenType onCanGenerateTexture() const override { return TexGenType::kCheap; } 45 sk_sp<GrTextureProxy> onGenerateTexture(GrRecordingContext*, const SkImageInfo&, 46 const SkIPoint&, bool willNeedMipMaps) override; 47 48 private: 49 GrAHardwareBufferImageGenerator(const SkImageInfo&, AHardwareBuffer*, SkAlphaType, 50 bool isProtectedContent, uint32_t bufferFormat, 51 GrSurfaceOrigin surfaceOrigin); 52 sk_sp<GrTextureProxy> makeProxy(GrRecordingContext* context); 53 54 void releaseTextureRef(); 55 56 static void ReleaseRefHelper_TextureReleaseProc(void* ctx); 57 58 AHardwareBuffer* fHardwareBuffer; 59 uint32_t fBufferFormat; 60 const bool fIsProtectedContent; 61 GrSurfaceOrigin fSurfaceOrigin; 62 63 typedef SkImageGenerator INHERITED; 64 }; 65 #endif // GrAHardwareBufferImageGenerator_DEFINED 66