/* * Copyright (C) 2012 Adobe Systems Incorporated. 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 THE COPYRIGHT HOLDER “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 THE COPYRIGHT HOLDER 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 CustomFilterGlobalContext_h #define CustomFilterGlobalContext_h #if ENABLE(CSS_SHADERS) && USE(3D_GRAPHICS) #include "ANGLEWebKitBridge.h" #include <wtf/HashMap.h> #include <wtf/RefPtr.h> namespace WebCore { class HostWindow; class GraphicsContext3D; class CustomFilterGlobalContext { public: CustomFilterGlobalContext(); ~CustomFilterGlobalContext(); GraphicsContext3D* context() const { return m_context.get(); } // CSS shaders not referenced from the CSS mix function should be validated just like regular WebGL shaders. // This ANGLE validator uses the SH_WEBGL_SPEC flag. ANGLEWebKitBridge* webglShaderValidator(); // CSS shaders referenced from the CSS mix function should be validated slightly differently than WebGL shaders. // This ANGLE validator uses the SH_CSS_SHADERS_SPEC flag. // Under this flag, most notably: // - The "gl_FragColor" built-in is not available. // - Instead, the "css_MixColor" and "css_ColorMatrix" built-ins are available. // - The "css_" prefix is reserved. // - In the translated source that ANGLE returns, ANGLE renames the author's "main" function to "css_main". // The complete details are documented in ANGLE/ShaderLang.h. ANGLEWebKitBridge* mixShaderValidator(); void prepareContextIfNeeded(HostWindow*); private: static PassOwnPtr<ANGLEWebKitBridge> createShaderValidator(ShShaderSpec); RefPtr<GraphicsContext3D> m_context; OwnPtr<ANGLEWebKitBridge> m_webglShaderValidator; OwnPtr<ANGLEWebKitBridge> m_mixShaderValidator; }; } // namespace WebCore #endif // ENABLE(CSS_SHADERS) && USE(3D_GRAPHICS) #endif // CustomFilterGlobalContext_h