1 // 2 // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 7 // Shader.h: Defines the abstract gl::Shader class and its concrete derived 8 // classes VertexShader and FragmentShader. Implements GL shader objects and 9 // related functionality. [OpenGL ES 2.0.24] section 2.10 page 24 and section 10 // 3.8 page 84. 11 12 #ifndef LIBGLESV2_SHADER_H_ 13 #define LIBGLESV2_SHADER_H_ 14 15 16 #include <string> 17 #include <list> 18 #include <vector> 19 20 #include "angle_gl.h" 21 #include <GLSLANG/ShaderLang.h> 22 23 #include "common/angleutils.h" 24 #include "libGLESv2/angletypes.h" 25 26 namespace rx 27 { 28 class ShaderImpl; 29 } 30 31 namespace gl 32 { 33 class ResourceManager; 34 35 struct PackedVarying : public sh::Varying 36 { 37 unsigned int registerIndex; // Assigned during link 38 unsigned int columnIndex; // Assigned during link, defaults to 0 39 40 PackedVarying(const sh::Varying &varying) 41 : sh::Varying(varying), 42 registerIndex(GL_INVALID_INDEX), 43 columnIndex(0) 44 {} 45 46 bool registerAssigned() const { return registerIndex != GL_INVALID_INDEX; } 47 bool isBuiltIn() const { return name.compare(0, 3, "gl_") == 0; } 48 49 void resetRegisterAssignment() 50 { 51 registerIndex = GL_INVALID_INDEX; 52 } 53 }; 54 55 class Shader 56 { 57 public: 58 Shader(ResourceManager *manager, rx::ShaderImpl *impl, GLenum type, GLuint handle); 59 60 virtual ~Shader(); 61 62 GLenum getType() const { return mType; } 63 GLuint getHandle() const; 64 65 rx::ShaderImpl *getImplementation() { return mShader; } 66 const rx::ShaderImpl *getImplementation() const { return mShader; } 67 68 void deleteSource(); 69 void setSource(GLsizei count, const char *const *string, const GLint *length); 70 int getInfoLogLength() const; 71 void getInfoLog(GLsizei bufSize, GLsizei *length, char *infoLog) const; 72 int getSourceLength() const; 73 void getSource(GLsizei bufSize, GLsizei *length, char *buffer) const; 74 int getTranslatedSourceLength() const; 75 void getTranslatedSource(GLsizei bufSize, GLsizei *length, char *buffer) const; 76 77 void compile(); 78 bool isCompiled() const { return mCompiled; } 79 80 void addRef(); 81 void release(); 82 unsigned int getRefCount() const; 83 bool isFlaggedForDeletion() const; 84 void flagForDeletion(); 85 86 const std::vector<gl::PackedVarying> &getVaryings() const; 87 const std::vector<sh::Uniform> &getUniforms() const; 88 const std::vector<sh::InterfaceBlock> &getInterfaceBlocks() const; 89 const std::vector<sh::Attribute> &getActiveAttributes() const; 90 const std::vector<sh::Attribute> &getActiveOutputVariables() const; 91 92 std::vector<gl::PackedVarying> &getVaryings(); 93 std::vector<sh::Uniform> &getUniforms(); 94 std::vector<sh::InterfaceBlock> &getInterfaceBlocks(); 95 std::vector<sh::Attribute> &getActiveAttributes(); 96 std::vector<sh::Attribute> &getActiveOutputVariables(); 97 98 private: 99 DISALLOW_COPY_AND_ASSIGN(Shader); 100 101 static void getSourceImpl(const std::string &source, GLsizei bufSize, GLsizei *length, char *buffer); 102 103 rx::ShaderImpl *mShader; 104 const GLuint mHandle; 105 const GLenum mType; 106 std::string mSource; 107 unsigned int mRefCount; // Number of program objects this shader is attached to 108 bool mDeleteStatus; // Flag to indicate that the shader can be deleted when no longer in use 109 bool mCompiled; // Indicates if this shader has been successfully compiled 110 111 ResourceManager *mResourceManager; 112 }; 113 114 } 115 116 #endif // LIBGLESV2_SHADER_H_ 117
