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) 2000-2014 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 #include "OgreShaderGLSLProgramWriter.h" 32 #include "OgreShaderParameter.h" 33 #include "OgreStringVector.h" 34 35 namespace Ogre { 36 namespace RTShader { 37 38 class Function; 39 class FunctionInvocation; 40 class Operand; 41 class Program; 42 43 /** \addtogroup Optional 44 * @{ 45 */ 46 /** \addtogroup RTShader 47 * @{ 48 */ 49 50 /** GLSL ES target language writer implementation. 51 @see ProgramWriter. 52 */ 53 class GLSLESProgramWriter : public GLSLProgramWriter 54 { 55 // Interface. 56 public: 57 58 /** Class constructor. 59 */ 60 GLSLESProgramWriter (); 61 62 /** Class destructor */ 63 virtual ~GLSLESProgramWriter (); 64 65 66 /** 67 @see ProgramWriter::writeSourceCode. 68 */ 69 virtual void writeSourceCode (std::ostream& os, Program* program); 70 71 /** 72 @see ProgramWriter::getTargetLanguage. 73 */ getTargetLanguage()74 virtual const String& getTargetLanguage () const { return TargetLanguage; } 75 76 static String TargetLanguage; 77 78 protected: 79 typedef std::map<FunctionInvocation, String> FunctionMap; 80 typedef std::vector<FunctionInvocation> FunctionVector; 81 typedef FunctionMap::const_iterator FunctionMapIterator; 82 typedef GpuConstTypeToStringMap::const_iterator GpuConstTypeToStringMapIterator; 83 84 // Protected methods. 85 protected: 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 String processOperand(Operand op, GpuProgramType gpuType); 98 99 /** Check if a string matches one of the GLSL ES basic types */ 100 bool isBasicType(String &type); 101 102 /** Search within a function body for non-builtin functions that a given function invocation depends on. */ 103 void discoverFunctionDependencies(const FunctionInvocation &invoc, FunctionVector &depVector); 104 105 // Attributes. 106 protected: 107 108 FunctionMap mFunctionCacheMap; // Map function invocation to body. Used as a cache to reduce library file reads and for inlining 109 StringMap mDefinesMap; // Map of #defines and the function library that contains them 110 111 StringMap mCachedFunctionLibraries; // Holds the cached function libraries 112 }; 113 114 /** GLSL ES program writer factory implementation. 115 @see ProgramWriterFactory 116 */ 117 class ShaderProgramWriterGLSLESFactory : public ProgramWriterFactory 118 { 119 public: ShaderProgramWriterGLSLESFactory()120 ShaderProgramWriterGLSLESFactory() : mLanguage("glsles") 121 { 122 } ~ShaderProgramWriterGLSLESFactory()123 virtual ~ShaderProgramWriterGLSLESFactory() {} 124 125 /** 126 @see ProgramWriterFactory::getTargetLanguage 127 */ getTargetLanguage(void)128 virtual const String& getTargetLanguage(void) const 129 { 130 return mLanguage; 131 } 132 133 /** 134 @see ProgramWriterFactory::create 135 */ create(void)136 virtual ProgramWriter* create(void) 137 { 138 return OGRE_NEW GLSLESProgramWriter(); 139 } 140 141 private: 142 String mLanguage; 143 }; 144 145 /** @} */ 146 /** @} */ 147 148 } 149 } 150 151 #endif 152