зеркало из https://github.com/mozilla/gecko-dev.git
66 строки
2.1 KiB
C
66 строки
2.1 KiB
C
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_GFX_RENDEREXTERNALTEXTUREHOST_H
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#define MOZILLA_GFX_RENDEREXTERNALTEXTUREHOST_H
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#include "mozilla/layers/TextureHostOGL.h"
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#include "RenderTextureHost.h"
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namespace mozilla {
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namespace wr {
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/**
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* RenderExternalTextureHost manages external textures used by WebRender on Mac.
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* The motivation for this is to be able to use Apple Client Storage OpenGL
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* extension, which makes it possible to avoid some copies during texture
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* upload. This is especially helpful for high resolution video.
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*/
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class RenderExternalTextureHost final : public RenderTextureHost {
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public:
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RenderExternalTextureHost(uint8_t* aBuffer,
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const layers::BufferDescriptor& aDescriptor);
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wr::WrExternalImage Lock(uint8_t aChannelIndex, gl::GLContext* aGL,
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wr::ImageRendering aRendering) override;
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void Unlock() override;
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void PrepareForUse() override;
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private:
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~RenderExternalTextureHost();
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bool CreateSurfaces();
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void DeleteSurfaces();
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void DeleteTextures();
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uint8_t* GetBuffer() const { return mBuffer; }
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bool InitializeIfNeeded();
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bool IsReadyForDeletion();
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bool IsYUV() const { return mFormat == gfx::SurfaceFormat::YUV; }
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size_t PlaneCount() const { return IsYUV() ? 3 : 1; }
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void UpdateTexture(size_t aIndex);
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void UpdateTextures(wr::ImageRendering aRendering);
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uint8_t* mBuffer;
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layers::BufferDescriptor mDescriptor;
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bool mInitialized;
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bool mTextureUpdateNeeded;
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gfx::IntSize mSize;
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gfx::SurfaceFormat mFormat;
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RefPtr<gl::GLContext> mGL;
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RefPtr<gfx::DataSourceSurface> mSurfaces[3];
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RefPtr<layers::DirectMapTextureSource> mTextureSources[3];
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wr::WrExternalImage mImages[3];
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};
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} // namespace wr
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} // namespace mozilla
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#endif // MOZILLA_GFX_RENDEREXTERNALTEXTUREHOST_H
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