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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <GrAHardwareBufferUtils.h>
#include <GrBackendSurface.h>
#include <SkImage.h>
#include <android/hardware_buffer.h>
#include <system/graphics.h>
namespace android {
namespace uirenderer {
/**
* AutoBackendTextureRelease manages EglImage/VkImage lifetime. It is a ref-counted object
* that keeps GPU resources alive until the last SkImage object using them is destroyed.
*/
class AutoBackendTextureRelease final {
public:
AutoBackendTextureRelease(GrDirectContext* context,
AHardwareBuffer* buffer);
const GrBackendTexture& getTexture() const { return mBackendTexture; }
// Only called on the RenderThread, so it need not be thread-safe.
void ref() { mUsageCount++; }
void unref(bool releaseImage);
inline sk_sp<SkImage> getImage() const { return mImage; }
void makeImage(AHardwareBuffer* buffer,
android_dataspace dataspace,
GrDirectContext* context);
void newBufferContent(GrDirectContext* context);
void releaseQueueOwnership(GrDirectContext* context);
private:
// The only way to invoke dtor is with unref, when mUsageCount is 0.
~AutoBackendTextureRelease() {}
GrBackendTexture mBackendTexture;
GrAHardwareBufferUtils::DeleteImageProc mDeleteProc;
GrAHardwareBufferUtils::UpdateImageProc mUpdateProc;
GrAHardwareBufferUtils::TexImageCtx mImageCtx;
// Starting with refcount 1, because the first ref is held by SurfaceTexture. Additional refs
// are held by SkImages.
int mUsageCount = 1;
// mImage is the SkImage created from mBackendTexture.
sk_sp<SkImage> mImage;
};
} /* namespace uirenderer */
} /* namespace android */
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