1 /* 2 * Copyright 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <GrAHardwareBufferUtils.h> 20 #include <GrBackendSurface.h> 21 #include <SkImage.h> 22 #include <android/hardware_buffer.h> 23 #include <system/graphics.h> 24 25 namespace android { 26 namespace uirenderer { 27 28 /** 29 * AutoBackendTextureRelease manages EglImage/VkImage lifetime. It is a ref-counted object 30 * that keeps GPU resources alive until the last SkImage object using them is destroyed. 31 */ 32 class AutoBackendTextureRelease final { 33 public: 34 AutoBackendTextureRelease(GrDirectContext* context, 35 AHardwareBuffer* buffer); 36 getTexture()37 const GrBackendTexture& getTexture() const { return mBackendTexture; } 38 39 // Only called on the RenderThread, so it need not be thread-safe. ref()40 void ref() { mUsageCount++; } 41 42 void unref(bool releaseImage); 43 getImage()44 inline sk_sp<SkImage> getImage() const { return mImage; } 45 46 void makeImage(AHardwareBuffer* buffer, 47 android_dataspace dataspace, 48 GrDirectContext* context); 49 50 void newBufferContent(GrDirectContext* context); 51 52 void releaseQueueOwnership(GrDirectContext* context); 53 54 private: 55 // The only way to invoke dtor is with unref, when mUsageCount is 0. ~AutoBackendTextureRelease()56 ~AutoBackendTextureRelease() {} 57 58 GrBackendTexture mBackendTexture; 59 GrAHardwareBufferUtils::DeleteImageProc mDeleteProc; 60 GrAHardwareBufferUtils::UpdateImageProc mUpdateProc; 61 GrAHardwareBufferUtils::TexImageCtx mImageCtx; 62 63 // Starting with refcount 1, because the first ref is held by SurfaceTexture. Additional refs 64 // are held by SkImages. 65 int mUsageCount = 1; 66 67 // mImage is the SkImage created from mBackendTexture. 68 sk_sp<SkImage> mImage; 69 }; 70 71 } /* namespace uirenderer */ 72 } /* namespace android */ 73