1 /* 2 ----------------------------------------------------------------------------- 3 This source file is part of OGRE 4 (Object-oriented Graphics Rendering Engine) 5 For the latest info, see http://www.ogre3d.org 6 7 Copyright (c) 2000-2013 Torus Knot Software Ltd 8 Permission is hereby granted, free of charge, to any person obtaining a copy 9 of this software and associated documentation files (the "Software"), to deal 10 in the Software without restriction, including without limitation the rights 11 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 copies of the Software, and to permit persons to whom the Software is 13 furnished to do so, subject to the following conditions: 14 15 The above copyright notice and this permission notice shall be included in 16 all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 21 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 THE SOFTWARE. 25 ----------------------------------------------------------------------------- 26 */ 27 #ifndef _ShaderProgramWriterGLSLES_ 28 #define _ShaderProgramWriterGLSLES_ 29 30 #include "OgreShaderProgramWriterManager.h" 31 32 namespace Ogre { 33 namespace RTShader { 34 35 /** \addtogroup Core 36 * @{ 37 */ 38 /** \addtogroup RTShader 39 * @{ 40 */ 41 42 /** GLSL ES target language writer implementation. 43 @see ProgramWriter. 44 */ 45 class GLSLESProgramWriter : public ProgramWriter 46 { 47 // Interface. 48 public: 49 50 /** Class constructor. 51 */ 52 GLSLESProgramWriter (); 53 54 /** Class destructor */ 55 virtual ~GLSLESProgramWriter (); 56 57 58 /** 59 @see ProgramWriter::writeSourceCode. 60 */ 61 virtual void writeSourceCode (std::ostream& os, Program* program); 62 63 /** 64 @see ProgramWriter::getTargetLanguage. 65 */ getTargetLanguage()66 virtual const String& getTargetLanguage () const { return TargetLanguage; } 67 68 static String TargetLanguage; 69 70 protected: 71 typedef map<GpuConstantType, const char*>::type GpuConstTypeToStringMap; 72 typedef map<Parameter::Semantic, const char*>::type ParamSemanticToStringMap; 73 typedef map<Parameter::Content, const char*> ::type ParamContentToStringMap; 74 typedef map<String, String>::type StringMap; 75 typedef map<FunctionInvocation, String>::type FunctionMap; 76 typedef vector<FunctionInvocation>::type FunctionVector; 77 typedef FunctionMap::const_iterator FunctionMapIterator; 78 typedef FunctionVector::const_iterator FunctionVectorIterator; 79 typedef GpuConstTypeToStringMap::const_iterator GpuConstTypeToStringMapIterator; 80 81 // Protected methods. 82 protected: 83 84 /** Initialize string maps. */ 85 void initializeStringMaps (); 86 87 /** Cache functions of a dependency */ 88 virtual void cacheDependencyFunctions(const String & libName); 89 90 91 /** Create a FunctionInvocation object from a string taken out of a shader library. */ 92 FunctionInvocation *createInvocationFromString (const String & input); 93 94 /** Write the program dependencies. */ 95 void writeProgramDependencies (std::ostream& os, Program* program); 96 97 /** Write a local parameter. */ 98 void writeLocalParameter (std::ostream& os, ParameterPtr parameter); 99 100 /** Write the input params of the function */ 101 void writeInputParameters (std::ostream& os, Function* function, GpuProgramType gpuType); 102 103 /** Write the output params of the function */ 104 void writeOutParameters (std::ostream& os, Function* function, GpuProgramType gpuType); 105 106 String processOperand(Operand op, GpuProgramType gpuType); 107 108 /** Check if a string matches one of the GLSL ES basic types */ 109 bool isBasicType(String &type); 110 111 /** Search within a function body for non-builtin functions that a given function invocation depends on. */ 112 void discoverFunctionDependencies(const FunctionInvocation &invoc, FunctionVector &depVector); 113 114 // Attributes. 115 protected: 116 GpuConstTypeToStringMap mGpuConstTypeMap; // Map between GPU constant type to string value. 117 ParamSemanticToStringMap mParamSemanticMap; // Map between parameter semantic to string value. 118 119 StringMap mInputToGLStatesMap; // Map parameter name to a new parameter name (sometimes renaming is required to match names between vertex and fragment shader) 120 FunctionMap mFunctionCacheMap; // Map function invocation to body. Used as a cache to reduce library file reads and for inlining 121 StringMap mDefinesMap; // Map of #defines and the function library that contains them 122 ParamContentToStringMap mContentToPerVertexAttributes; // Map parameter content to vertex attributes 123 int mGLSLVersion; // Holds the current glsl es version 124 StringVector mFragInputParams; // Holds the fragment input params 125 StringMap mCachedFunctionLibraries; // Holds the cached function libraries 126 }; 127 128 /** GLSL ES program writer factory implementation. 129 @see ProgramWriterFactory 130 */ 131 class ShaderProgramWriterGLSLESFactory : public ProgramWriterFactory 132 { 133 public: ShaderProgramWriterGLSLESFactory()134 ShaderProgramWriterGLSLESFactory() : mLanguage("glsles") 135 { 136 } ~ShaderProgramWriterGLSLESFactory()137 virtual ~ShaderProgramWriterGLSLESFactory() {} 138 139 /** 140 @see ProgramWriterFactory::getTargetLanguage 141 */ getTargetLanguage(void)142 virtual const String& getTargetLanguage(void) const 143 { 144 return mLanguage; 145 } 146 147 /** 148 @see ProgramWriterFactory::create 149 */ create(void)150 virtual ProgramWriter* create(void) 151 { 152 return OGRE_NEW GLSLESProgramWriter(); 153 } 154 155 private: 156 String mLanguage; 157 }; 158 159 /** @} */ 160 /** @} */ 161 162 } 163 } 164 165 #endif 166