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Diffstat (limited to 'libs/hwui/AutoBackendTextureRelease.h')
-rw-r--r-- | libs/hwui/AutoBackendTextureRelease.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/libs/hwui/AutoBackendTextureRelease.h b/libs/hwui/AutoBackendTextureRelease.h new file mode 100644 index 000000000000..acdd63cb7921 --- /dev/null +++ b/libs/hwui/AutoBackendTextureRelease.h @@ -0,0 +1,67 @@ +/* + * 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(GrContext* 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, GrContext* context); + + void newBufferContent(GrContext* 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 */ |