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* Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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#ifndef WebCustomFilterProgramProxy_h
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#define WebCustomFilterProgramProxy_h
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#if USE(COORDINATED_GRAPHICS) && ENABLE(CSS_SHADERS)
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#include "TextureMapperPlatformCompiledProgram.h"
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#include <wtf/RefCounted.h>
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class WebCustomFilterProgramProxy;
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class WebCustomFilterProgramProxyClient {
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virtual void removeCustomFilterProgramProxy(WebCustomFilterProgramProxy*) = 0;
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// This is a proxy class used to store the ID of the custom filter program serialized to the other process.
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// It lives in the WebProcess and is referenced from the CustomFilterValidatedProgram meaning that it will be kept alive as
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// long as a layer on the page will render with this program. It will call removeCustomFilterProgramProxy on the m_client
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// when the program is no longer needed to render the filter. The client can then send a message to the UI process
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// to destroy the associated reference. Note that more layers can share the same program and there's
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// no need to implement a caching mechanism in the compositor side.
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class WebCustomFilterProgramProxy : public RefCounted<WebCustomFilterProgramProxy>, public WebCore::TextureMapperPlatformCompiledProgramClient {
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using RefCounted<WebCustomFilterProgramProxy>::ref;
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using RefCounted<WebCustomFilterProgramProxy>::deref;
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static PassRefPtr<WebCustomFilterProgramProxy> create()
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return adoptRef(new WebCustomFilterProgramProxy());
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int id() const { return m_id; }
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// Needed to make TextureMapperPlatformCompiledProgramClient look like a RefCounted object.
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virtual void refFromValidatedProgram() { ref(); }
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virtual void derefFromValidatedProgram() { deref(); }
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virtual ~WebCustomFilterProgramProxy();
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void setClient(WebCustomFilterProgramProxyClient* client) { m_client = client; }
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WebCustomFilterProgramProxyClient* client() const { return m_client; }
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WebCustomFilterProgramProxy()
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WebCustomFilterProgramProxyClient* m_client;
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#endif // USE(COORDINATED_GRAPHICS) && ENABLE(CSS_SHADERS)
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#endif // WebCustomFilterProgramProxy_h