michael@0: //
michael@0: // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: //
michael@0: 
michael@0: // Shader.h: Defines the abstract gl::Shader class and its concrete derived
michael@0: // classes VertexShader and FragmentShader. Implements GL shader objects and
michael@0: // related functionality. [OpenGL ES 2.0.24] section 2.10 page 24 and section
michael@0: // 3.8 page 84.
michael@0: 
michael@0: #ifndef LIBGLESV2_SHADER_H_
michael@0: #define LIBGLESV2_SHADER_H_
michael@0: 
michael@0: #define GL_APICALL
michael@0: #include <GLES2/gl2.h>
michael@0: #include <string>
michael@0: #include <list>
michael@0: #include <vector>
michael@0: 
michael@0: #include "compiler/CompilerUniform.h"
michael@0: #include "common/angleutils.h"
michael@0: 
michael@0: namespace rx
michael@0: {
michael@0: class Renderer;
michael@0: }
michael@0: 
michael@0: namespace gl
michael@0: {
michael@0: class ResourceManager;
michael@0: 
michael@0: struct Varying
michael@0: {
michael@0:     Varying(GLenum type, const std::string &name, int size, bool array)
michael@0:         : type(type), name(name), size(size), array(array), reg(-1), col(-1)
michael@0:     {
michael@0:     }
michael@0: 
michael@0:     GLenum type;
michael@0:     std::string name;
michael@0:     int size;   // Number of 'type' elements
michael@0:     bool array;
michael@0: 
michael@0:     int reg;    // First varying register, assigned during link
michael@0:     int col;    // First register element, assigned during link
michael@0: };
michael@0: 
michael@0: typedef std::list<Varying> VaryingList;
michael@0: 
michael@0: class Shader
michael@0: {
michael@0:     friend class ProgramBinary;
michael@0: 
michael@0:   public:
michael@0:     Shader(ResourceManager *manager, const rx::Renderer *renderer, GLuint handle);
michael@0: 
michael@0:     virtual ~Shader();
michael@0: 
michael@0:     virtual GLenum getType() = 0;
michael@0:     GLuint getHandle() const;
michael@0: 
michael@0:     void deleteSource();
michael@0:     void setSource(GLsizei count, const char **string, const GLint *length);
michael@0:     int getInfoLogLength() const;
michael@0:     void getInfoLog(GLsizei bufSize, GLsizei *length, char *infoLog);
michael@0:     int getSourceLength() const;
michael@0:     void getSource(GLsizei bufSize, GLsizei *length, char *buffer);
michael@0:     int getTranslatedSourceLength() const;
michael@0:     void getTranslatedSource(GLsizei bufSize, GLsizei *length, char *buffer);
michael@0:     const sh::ActiveUniforms &getUniforms();
michael@0: 
michael@0:     virtual void compile() = 0;
michael@0:     virtual void uncompile();
michael@0:     bool isCompiled();
michael@0:     const char *getHLSL();
michael@0: 
michael@0:     void addRef();
michael@0:     void release();
michael@0:     unsigned int getRefCount() const;
michael@0:     bool isFlaggedForDeletion() const;
michael@0:     void flagForDeletion();
michael@0: 
michael@0:     static void releaseCompiler();
michael@0: 
michael@0:   protected:
michael@0:     void parseVaryings();
michael@0:     void resetVaryingsRegisterAssignment();
michael@0: 
michael@0:     void compileToHLSL(void *compiler);
michael@0: 
michael@0:     void getSourceImpl(char *source, GLsizei bufSize, GLsizei *length, char *buffer);
michael@0: 
michael@0:     static GLenum parseType(const std::string &type);
michael@0:     static bool compareVarying(const Varying &x, const Varying &y);
michael@0: 
michael@0:     const rx::Renderer *const mRenderer;
michael@0: 
michael@0:     VaryingList mVaryings;
michael@0: 
michael@0:     bool mUsesMultipleRenderTargets;
michael@0:     bool mUsesFragColor;
michael@0:     bool mUsesFragData;
michael@0:     bool mUsesFragCoord;
michael@0:     bool mUsesFrontFacing;
michael@0:     bool mUsesPointSize;
michael@0:     bool mUsesPointCoord;
michael@0:     bool mUsesDepthRange;
michael@0:     bool mUsesFragDepth;
michael@0: 
michael@0:     static void *mFragmentCompiler;
michael@0:     static void *mVertexCompiler;
michael@0: 
michael@0:   private:
michael@0:     DISALLOW_COPY_AND_ASSIGN(Shader);
michael@0: 
michael@0:     void initializeCompiler();
michael@0: 
michael@0:     const GLuint mHandle;
michael@0:     unsigned int mRefCount;     // Number of program objects this shader is attached to
michael@0:     bool mDeleteStatus;         // Flag to indicate that the shader can be deleted when no longer in use
michael@0: 
michael@0:     char *mSource;
michael@0:     char *mHlsl;
michael@0:     char *mInfoLog;
michael@0:     sh::ActiveUniforms mActiveUniforms;
michael@0: 
michael@0:     ResourceManager *mResourceManager;
michael@0: };
michael@0: 
michael@0: struct Attribute
michael@0: {
michael@0:     Attribute() : type(GL_NONE), name("")
michael@0:     {
michael@0:     }
michael@0: 
michael@0:     Attribute(GLenum type, const std::string &name) : type(type), name(name)
michael@0:     {
michael@0:     }
michael@0: 
michael@0:     GLenum type;
michael@0:     std::string name;
michael@0: };
michael@0: 
michael@0: typedef std::vector<Attribute> AttributeArray;
michael@0: 
michael@0: class VertexShader : public Shader
michael@0: {
michael@0:     friend class ProgramBinary;
michael@0: 
michael@0:   public:
michael@0:     VertexShader(ResourceManager *manager, const rx::Renderer *renderer, GLuint handle);
michael@0: 
michael@0:     ~VertexShader();
michael@0: 
michael@0:     virtual GLenum getType();
michael@0:     virtual void compile();
michael@0:     virtual void uncompile();
michael@0:     int getSemanticIndex(const std::string &attributeName);
michael@0: 
michael@0:   private:
michael@0:     DISALLOW_COPY_AND_ASSIGN(VertexShader);
michael@0: 
michael@0:     void parseAttributes();
michael@0: 
michael@0:     AttributeArray mAttributes;
michael@0: };
michael@0: 
michael@0: class FragmentShader : public Shader
michael@0: {
michael@0:   public:
michael@0:     FragmentShader(ResourceManager *manager,const rx::Renderer *renderer, GLuint handle);
michael@0: 
michael@0:     ~FragmentShader();
michael@0: 
michael@0:     virtual GLenum getType();
michael@0:     virtual void compile();
michael@0: 
michael@0:   private:
michael@0:     DISALLOW_COPY_AND_ASSIGN(FragmentShader);
michael@0: };
michael@0: }
michael@0: 
michael@0: #endif   // LIBGLESV2_SHADER_H_