/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_GFX_RENDEREXTERNALTEXTUREHOST_H
#define MOZILLA_GFX_RENDEREXTERNALTEXTUREHOST_H
#include "mozilla/layers/TextureHostOGL.h"
#include "RenderTextureHostSWGL.h"
namespace mozilla {
namespace wr {
/**
* RenderExternalTextureHost manages external textures used by WebRender on Mac.
* The motivation for this is to be able to use Apple Client Storage OpenGL
* extension, which makes it possible to avoid some copies during texture
* upload. This is especially helpful for high resolution video.
*/
class RenderExternalTextureHost final : public RenderTextureHostSWGL {
public:
RenderExternalTextureHost(uint8_t* aBuffer,
const layers::BufferDescriptor& aDescriptor);
wr::WrExternalImage Lock(uint8_t aChannelIndex, gl::GLContext* aGL) override;
void Unlock() override;
void PrepareForUse() override;
size_t Bytes() override {
return mSize.width * mSize.height * BytesPerPixel(mFormat);
}
// RenderTextureHostSWGL
size_t GetPlaneCount()
const override;
gfx::SurfaceFormat GetFormat()
const override;
gfx::ColorDepth GetColorDepth()
const override;
gfx::YUVRangedColorSpace GetYUVColorSpace()
const override;
gfx::TransferFunction GetTransferFunction()
const override;
bool MapPlane(RenderCompositor* aCompositor, uint8_t aChannelIndex,
PlaneInfo& aPlaneInfo) override;
void UnmapPlanes() override;
private:
~RenderExternalTextureHost();
bool CreateSurfaces();
void DeleteSurfaces();
void DeleteTextures();
uint8_t* GetBuffer()
const {
return mBuffer; }
bool InitializeIfNeeded();
bool IsReadyForDeletion();
bool IsYUV()
const {
return mFormat == gfx::SurfaceFormat::YUV420; }
size_t PlaneCount()
const {
return IsYUV() ?
3 :
1; }
void UpdateTexture(size_t aIndex);
void UpdateTextures();
uint8_t* mBuffer;
layers::BufferDescriptor mDescriptor;
bool mInitialized;
bool mTextureUpdateNeeded;
gfx::IntSize mSize;
gfx::SurfaceFormat mFormat;
RefPtr<gl::GLContext> mGL;
RefPtr<gfx::DataSourceSurface> mSurfaces[
3];
RefPtr<layers::DirectMapTextureSource> mTextureSources[
3];
wr::WrExternalImage mImages[
3];
};
}
// namespace wr
}
// namespace mozilla
#endif // MOZILLA_GFX_RENDEREXTERNALTEXTUREHOST_H
