1 /* 2 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above 9 * copyright notice, this list of conditions and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following 13 * disclaimer in the documentation and/or other materials 14 * provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AS IS AND ANY 17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 26 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef CustomFilterProgram_h 31 #define CustomFilterProgram_h 32 33 #include "core/platform/graphics/filters/custom/CustomFilterProgramInfo.h" 34 35 #include "wtf/HashCountedSet.h" 36 #include "wtf/RefCounted.h" 37 #include "wtf/text/WTFString.h" 38 39 namespace WebCore { 40 41 class GraphicsContext3D; 42 class CustomFilterCompiledProgram; 43 class CustomFilterProgramClient; 44 45 // This is the base class for the StyleCustomFilterProgram class which knows how to keep 46 // references to the cached shaders. 47 class CustomFilterProgram: public RefCounted<CustomFilterProgram> { 48 public: 49 virtual ~CustomFilterProgram(); 50 51 virtual bool isLoaded() const = 0; 52 53 void addClient(CustomFilterProgramClient*); 54 void removeClient(CustomFilterProgramClient*); 55 56 CustomFilterProgramInfo programInfo() const; 57 58 virtual String vertexShaderString() const = 0; 59 virtual String fragmentShaderString() const = 0; 60 CustomFilterProgramType programType() const { return m_programType; } 61 CustomFilterProgramMixSettings mixSettings() const { return m_mixSettings; } 62 CustomFilterMeshType meshType() const { return m_meshType; } 63 64 protected: 65 // StyleCustomFilterProgram can notify the clients that the cached resources are 66 // loaded and it is ready to create CustomFilterCompiledProgram objects. 67 void notifyClients(); 68 69 virtual void willHaveClients() = 0; 70 virtual void didRemoveLastClient() = 0; 71 72 // Keep the constructor protected to prevent creating this object directly. 73 CustomFilterProgram(CustomFilterProgramType, const CustomFilterProgramMixSettings&, CustomFilterMeshType); 74 75 private: 76 // CustomFilterPrograms are unique combinations of shaders and can be 77 // compared using just the pointer value instead. 78 // These will catch anyone doing a value equal comparison. 79 bool operator==(const CustomFilterProgram&) const; 80 bool operator!=(const CustomFilterProgram&) const; 81 82 typedef HashCountedSet<CustomFilterProgramClient*> CustomFilterProgramClientList; 83 CustomFilterProgramClientList m_clients; 84 CustomFilterProgramType m_programType; 85 CustomFilterProgramMixSettings m_mixSettings; 86 CustomFilterMeshType m_meshType; 87 }; 88 89 } 90 91 92 #endif 93
