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91 lines
2.4 KiB
C++
91 lines
2.4 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/layers/TextureClient.h"
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#include "mozilla/layers/CompositableClient.h"
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namespace mozilla {
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namespace layers {
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class ClientCanvasLayer;
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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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static TemporaryRef<CanvasClient> CreateCanvasClient(CompositableType aImageHostType,
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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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virtual void SetDescriptorFromReply(TextureIdentifier aTextureId,
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const SurfaceDescriptor& aDescriptor) MOZ_OVERRIDE
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{
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mTextureClient->SetDescriptorFromReply(aDescriptor);
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}
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protected:
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RefPtr<TextureClient> mTextureClient;
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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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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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};
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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 CanvasClientWebGL : public CanvasClient
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{
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public:
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CanvasClientWebGL(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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};
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}
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}
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#endif
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