зеркало из https://github.com/mozilla/gecko-dev.git
152 строки
4.4 KiB
C++
152 строки
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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_CANVASCLIENT_H
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#define MOZILLA_GFX_CANVASCLIENT_H
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#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
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#include "mozilla/Attributes.h" // for MOZ_OVERRIDE
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#include "mozilla/RefPtr.h" // for RefPtr, TemporaryRef
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#include "mozilla/layers/CompositableClient.h" // for CompositableClient
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#include "mozilla/layers/CompositorTypes.h" // for TextureInfo, etc
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#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor
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#include "mozilla/layers/TextureClient.h" // for TextureClient, etc
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#include "mozilla/mozalloc.h" // for operator delete
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#include "mozilla/gfx/Point.h" // for IntSize
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#include "mozilla/gfx/Types.h" // for SurfaceFormat
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namespace mozilla {
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namespace layers {
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class ClientCanvasLayer;
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class CompositableForwarder;
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/**
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* Compositable client for 2d and webgl canvas.
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*/
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class CanvasClient : public CompositableClient
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{
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public:
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/**
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* Creates, configures, and returns a new canvas client. If necessary, a
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* message will be sent to the compositor to create a corresponding image
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* host.
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*/
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enum CanvasClientType {
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CanvasClientSurface,
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CanvasClientGLContext,
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};
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static TemporaryRef<CanvasClient> CreateCanvasClient(CanvasClientType aType,
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CompositableForwarder* aFwd,
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TextureFlags aFlags);
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CanvasClient(CompositableForwarder* aFwd, TextureFlags aFlags)
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: CompositableClient(aFwd)
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{
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mTextureInfo.mTextureFlags = aFlags;
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}
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virtual ~CanvasClient() {}
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virtual void Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer) = 0;
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virtual void Updated() { }
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protected:
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TextureInfo mTextureInfo;
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};
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// Used for 2D canvases and WebGL canvas on non-GL systems where readback is requried.
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class CanvasClient2D : public CanvasClient
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{
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public:
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CanvasClient2D(CompositableForwarder* aLayerForwarder,
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TextureFlags aFlags)
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: CanvasClient(aLayerForwarder, aFlags)
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{
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}
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TextureInfo GetTextureInfo() const
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{
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return TextureInfo(COMPOSITABLE_IMAGE);
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}
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virtual void Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer) MOZ_OVERRIDE;
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virtual bool AddTextureClient(TextureClient* aTexture) MOZ_OVERRIDE
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{
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MOZ_ASSERT((mTextureInfo.mTextureFlags & aTexture->GetFlags()) == mTextureInfo.mTextureFlags);
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return CompositableClient::AddTextureClient(aTexture);
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}
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virtual TemporaryRef<BufferTextureClient>
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CreateBufferTextureClient(gfx::SurfaceFormat aFormat,
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TextureFlags aFlags = TEXTURE_FLAGS_DEFAULT) MOZ_OVERRIDE;
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virtual void OnDetach() MOZ_OVERRIDE
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{
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mBuffer = nullptr;
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}
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private:
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RefPtr<TextureClient> mBuffer;
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};
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class DeprecatedCanvasClient2D : public CanvasClient
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{
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public:
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DeprecatedCanvasClient2D(CompositableForwarder* aLayerForwarder,
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TextureFlags aFlags);
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TextureInfo GetTextureInfo() const MOZ_OVERRIDE
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{
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return mTextureInfo;
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}
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virtual void Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer);
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virtual void Updated() MOZ_OVERRIDE;
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virtual void SetDescriptorFromReply(TextureIdentifier aTextureId,
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const SurfaceDescriptor& aDescriptor) MOZ_OVERRIDE
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{
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mDeprecatedTextureClient->SetDescriptorFromReply(aDescriptor);
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}
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private:
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RefPtr<DeprecatedTextureClient> mDeprecatedTextureClient;
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};
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// Used for GL canvases where we don't need to do any readback, i.e., with a
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// GL backend.
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class DeprecatedCanvasClientSurfaceStream : public CanvasClient
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{
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public:
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DeprecatedCanvasClientSurfaceStream(CompositableForwarder* aFwd,
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TextureFlags aFlags);
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TextureInfo GetTextureInfo() const MOZ_OVERRIDE
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{
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return mTextureInfo;
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}
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virtual void Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer);
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virtual void Updated() MOZ_OVERRIDE;
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virtual void SetDescriptorFromReply(TextureIdentifier aTextureId,
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const SurfaceDescriptor& aDescriptor) MOZ_OVERRIDE
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{
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mDeprecatedTextureClient->SetDescriptorFromReply(aDescriptor);
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}
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private:
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RefPtr<DeprecatedTextureClient> mDeprecatedTextureClient;
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};
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}
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}
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#endif
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