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 class GrSurfaceProxyView; 16 17 extern "C" { 18 typedef struct AHardwareBuffer AHardwareBuffer; 19 } 20 21 /** 22 * GrAHardwareBufferImageGenerator allows to create an SkImage attached to 23 * an existing android native hardware buffer. A hardware buffer has to be 24 * created with AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE usage, because it is 25 * bound to an external texture using an EGLImage. The image generator will 26 * keep a reference to the hardware buffer for its lifetime. A hardware buffer 27 * can be shared between processes and same buffer can be used in multiple GPU 28 * contexts. 29 * To implement certain features like tiling, Skia may copy the texture to 30 * avoid OpenGL API limitations. 31 */ 32 class GrAHardwareBufferImageGenerator : public SkImageGenerator { 33 public: 34 static std::unique_ptr<SkImageGenerator> Make(AHardwareBuffer*, SkAlphaType, 35 sk_sp<SkColorSpace>, GrSurfaceOrigin); 36 37 ~GrAHardwareBufferImageGenerator() override; 38 39 static void DeleteGLTexture(void* ctx); 40 41 protected: 42 43 bool onIsValid(GrRecordingContext*) const override; 44 45 GrSurfaceProxyView onGenerateTexture(GrRecordingContext*, const SkImageInfo&, const SkIPoint&, 46 GrMipmapped, GrImageTexGenPolicy) override; 47 48 private: 49 GrAHardwareBufferImageGenerator(const SkImageInfo&, AHardwareBuffer*, SkAlphaType, 50 bool isProtectedContent, uint32_t bufferFormat, 51 GrSurfaceOrigin surfaceOrigin); 52 GrSurfaceProxyView makeView(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 using INHERITED = SkImageGenerator; 64 }; 65 #endif // GrAHardwareBufferImageGenerator_DEFINED 66