gecko-dev/gfx/layers/client/ClientCanvasRenderer.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
Bug 1379920 - Introduce CanvasRenderer and its derived classes. r=nical,jrmuizel This patch move common canvas interfaces out of layer. So I create a base class CanvasRenderer which move interfaces from CanvasLayer. CopyableCanvasRenderer from CopyableCanvasLayer, ClientCanvasRenderer from ClientCanvasLayer and WebRenderCanvasRenderer from WebRenderCanvasLayer. And finally, WebRenderCanvasRendererSync for the non layers free mode and WebRenderCanvasRendererAsync for the layers free mode. Summary all changes in this patch. * Move class CanvasLayer::Data to CanvasRenderer.h and rename it to CanvasInitializeData. Because this class not only use by layer but also * Move BasicCanvasLayer::UpdateSurface to CopyableCanvasRenderer::ReadbackSurface. * CanvasClient::Update now accepts ShareableCanvasRenderer as parameter. not CanvasLayer. use by layers-free mode. Move it out of layer's class makes more sense. * Add InitializeCanvasRenderer in the canvas related classes to initialize CanvasRenderer without involved layer. * All canvas layer has function "CreateCanvasRendererInternal" that initialize corresponding CanvasRenderer. * Description of all CanvasRenderer classes: ** CanvasRenderer: Based classes. ** CopyableCanvasRenderer: Can readback canvas content to a SourceSurface. Use by BasicCanvasLayer. ** ShareableCanvasRenderer: Provide IPC capabilities that allow sending canvas content over IPC. This is pure virtual class because the IPC handling is different in different LayerManager. ** ClientCanvasRenderer: Implement IPC handling for ClientLayerManager. Use by ClientCanvasLayer. ** WebRenderCanvasRenderer: Implement IPC handling for WebRenderLayerManager. ** WebRenderCanvasRendererSync: Use by WebRenderCanvasLayer. ** WebRenderCanvasRendererAsync: Use by layers-free mode in WebRender. class diagram shows below: +--------------+ |CanvasRenderer| +-------+------+ ^ | +----------------------+ |CopyableCanvasRenderer| +----------------------+ ^ | +-----------+-----------+ |ShareableCanvasRenderer| +-----+-----------------+ ^ ^ +-------------+ +-------+ | | +--------------------+ +---------+-------------+ |ClientCanvasRenderer| |WebRenderCanvasRenderer| +--------------------+ +--------+--+-----------+ ^ ^ +-----------------------+ +----+ | | +-------------+-------------+ +-------------+--------------+ |WebRenderCanvasRendererSync| |WebRenderCanvasRendererAsync| +---------------------------+ +----------------------------+ MozReview-Commit-ID: 5hqQ19W169r
2017-08-03 08:55:14 +03:00
* 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 GFX_CLIENTCANVASRENDERER_H
#define GFX_CLIENTCANVASRENDERER_H
#include "ShareableCanvasRenderer.h"
namespace mozilla {
namespace layers {
class ClientCanvasLayer;
class ClientCanvasRenderer : public ShareableCanvasRenderer
{
public:
explicit ClientCanvasRenderer(ClientCanvasLayer* aLayer)
: mLayer(aLayer)
{ }
ClientCanvasRenderer* AsClientCanvasRenderer() override { return this; }
CompositableForwarder* GetForwarder() override;
bool CreateCompositable() override;
protected:
ClientCanvasLayer* mLayer;
};
} // namespace layers
} // namespace mozilla
#endif