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      1 /*
      2  * Copyright (C) 2010 Apple Inc. 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  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef ANGLEWebKitBridge_h
     27 #define ANGLEWebKitBridge_h
     28 
     29 #include "wtf/text/CString.h"
     30 #include "wtf/text/WTFString.h"
     31 
     32 #include "ShaderLang.h"
     33 
     34 namespace WebCore {
     35 
     36 enum ANGLEShaderType {
     37     SHADER_TYPE_VERTEX = SH_VERTEX_SHADER,
     38     SHADER_TYPE_FRAGMENT = SH_FRAGMENT_SHADER,
     39 };
     40 
     41 enum ANGLEShaderSymbolType {
     42     SHADER_SYMBOL_TYPE_ATTRIBUTE,
     43     SHADER_SYMBOL_TYPE_UNIFORM
     44 };
     45 
     46 struct ANGLEShaderSymbol {
     47     ANGLEShaderSymbolType symbolType;
     48     String name;
     49     String mappedName;
     50     ShDataType dataType;
     51     int size;
     52     bool isArray;
     53 
     54     bool isSampler() const
     55     {
     56         return symbolType == SHADER_SYMBOL_TYPE_UNIFORM
     57             && (dataType == SH_SAMPLER_2D
     58             || dataType == SH_SAMPLER_CUBE
     59             || dataType == SH_SAMPLER_2D_RECT_ARB
     60             || dataType == SH_SAMPLER_EXTERNAL_OES);
     61     }
     62 };
     63 
     64 class ANGLEWebKitBridge {
     65 public:
     66 
     67     ANGLEWebKitBridge(ShShaderOutput = SH_GLSL_OUTPUT, ShShaderSpec = SH_WEBGL_SPEC);
     68     ~ANGLEWebKitBridge();
     69 
     70     ShBuiltInResources getResources() { return m_resources; }
     71     void setResources(ShBuiltInResources);
     72 
     73     bool compileShaderSource(const char* shaderSource, ANGLEShaderType, String& translatedShaderSource, String& shaderValidationLog, Vector<ANGLEShaderSymbol>& symbols, int extraCompileOptions = 0);
     74 
     75 private:
     76 
     77     void cleanupCompilers();
     78 
     79     bool builtCompilers;
     80 
     81     ShHandle m_fragmentCompiler;
     82     ShHandle m_vertexCompiler;
     83 
     84     ShShaderOutput m_shaderOutput;
     85     ShShaderSpec m_shaderSpec;
     86 
     87     ShBuiltInResources m_resources;
     88 };
     89 
     90 } // namespace WebCore
     91 
     92 #endif
     93