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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef WebCompositorOutputSurface_h
#define WebCompositorOutputSurface_h
namespace WebKit {
struct WebCompositorFrame;
class WebGraphicsContext3D;
class WebCompositorSoftwareOutputDevice;
class WebCompositorOutputSurfaceClient;
// Represents the output surface for a compositor. The compositor owns
// and manages its destruction. Its lifetime is:
// 1. Created on the main thread via WebLayerTreeViewClient::createOutputSurface.
// 2. Passed to the compositor thread and bound to a client via bindToClient.
// From here on, it will only be used on the compositor thread.
// 3. If the 3D context is lost, then the compositor will delete the output surface
// (on the compositor thread) and go back to step 1.
class WebCompositorOutputSurface {
public:
virtual ~WebCompositorOutputSurface() { }
// Called by the compositor on the compositor thread. This is a place where thread-specific
// data for the output surface can be initialized, since from this point on the output surface
// will only be used on the compositor thread.
virtual bool bindToClient(WebCompositorOutputSurfaceClient*) = 0;
struct Capabilities {
Capabilities()
: hasParentCompositor(false)
{
}
bool hasParentCompositor;
};
virtual const Capabilities& capabilities() const = 0;
// Obtain the 3d context or the software device associated with this output surface. Either of these may return a null pointer, but not both.
// In the event of a lost context, the entire output surface should be recreated.
virtual WebGraphicsContext3D* context3D() const = 0;
virtual WebCompositorSoftwareOutputDevice* softwareDevice() const { return 0; }
// Sends frame data to the parent compositor. This should only be called
// when capabilities().hasParentCompositor.
virtual void sendFrameToParentCompositor(const WebCompositorFrame&) = 0;
};
}
#endif
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