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 CustomFilterGlobalContext_h 31 #define CustomFilterGlobalContext_h 32 33 #include "platform/graphics/angle/ANGLEPlatformBridge.h" 34 #include "platform/graphics/filters/custom/CustomFilterProgramInfo.h" 35 #include "wtf/HashMap.h" 36 #include "wtf/Noncopyable.h" 37 #include "wtf/RefPtr.h" 38 39 namespace WebCore { 40 41 class CustomFilterValidatedProgram; 42 class GraphicsContext3D; 43 44 typedef HashMap<CustomFilterProgramInfo, CustomFilterValidatedProgram*> CustomFilterValidatedProgramsMap; 45 46 class PLATFORM_EXPORT CustomFilterGlobalContext { 47 WTF_MAKE_NONCOPYABLE(CustomFilterGlobalContext); 48 public: 49 CustomFilterGlobalContext(); 50 ~CustomFilterGlobalContext(); 51 context()52 GraphicsContext3D* context() const { return m_context.get(); } 53 54 // CSS shaders not referenced from the CSS mix function should be validated just like regular WebGL shaders. 55 // This ANGLE validator uses the SH_WEBGL_SPEC flag. 56 ANGLEPlatformBridge* webglShaderValidator(); 57 58 // CSS shaders referenced from the CSS mix function should be validated slightly differently than WebGL shaders. 59 // This ANGLE validator uses the SH_CSS_SHADERS_SPEC flag. 60 // Under this flag, most notably: 61 // - The "gl_FragColor" built-in is not available. 62 // - Instead, the "css_MixColor" and "css_ColorMatrix" built-ins are available. 63 // - The "css_" prefix is reserved. 64 // - In the translated source that ANGLE returns, ANGLE renames the author's "main" function to "css_main". 65 // The complete details are documented in ANGLE/ShaderLang.h. 66 ANGLEPlatformBridge* mixShaderValidator(); 67 68 void prepareContextIfNeeded(); 69 70 PassRefPtr<CustomFilterValidatedProgram> getValidatedProgram(const CustomFilterProgramInfo&); 71 void removeValidatedProgram(const CustomFilterValidatedProgram*); 72 private: 73 static PassOwnPtr<ANGLEPlatformBridge> createShaderValidator(ShShaderSpec); 74 75 RefPtr<GraphicsContext3D> m_context; 76 OwnPtr<ANGLEPlatformBridge> m_webglShaderValidator; 77 OwnPtr<ANGLEPlatformBridge> m_mixShaderValidator; 78 CustomFilterValidatedProgramsMap m_programs; 79 }; 80 81 } // namespace WebCore 82 83 #endif // CustomFilterGlobalContext_h 84