186 lines
6.9 KiB
C
186 lines
6.9 KiB
C
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/******************************************************************************
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aGLSL.h
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Version: 0.9.4 - For OpenGL 2.0
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Last update: 2005/07/07
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===============
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CHANGES 0.9.4
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===============
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[1] Upgraded to GLEW-1.3.3
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[2] GLSL.h now uses OpenGL 2.0 functions only.
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(Renamed all "ancient" ARB functions to the new OpenGL 2.0 function names)
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[3] To remove confusion with OpenGL naming, the class aShaderProgram
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was renamed to glShaderObject.
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[4] removed the function initGLSL()
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added a function initGLExtensions()
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added a function checkGLSL() which returns false if GLSL is unavailable
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added a function checkGL2() which returns false if OpenGL 2.0 is unavailable
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[5] renamed methods:
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sendUnifomX -> setUniformX
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VertexAttribX -> setVertexAttrib1f
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******************************************************************************
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(c) 2003-2005 by Martin Christen. All Rights reserved.
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License: BSD
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******************************************************************************/
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#ifndef A_GLSL_H
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#define A_GLSL_H
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//-----------------------------------------------------------------------------
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#include <iostream>
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#include <fstream>
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#include <algorithm>
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#include <math.h>
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#include <GLew.h>
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#include <GL/glut.h>// Header File For The GLUT Library
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#include <vector>
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#include <string>
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#include <windows.h>
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//-----------------------------------------------------------------------------
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int CheckGLError(char *file, int line);
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#define CHECK_GL_ERROR() CheckGLError(__FILE__, __LINE__)
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class glShaderObject
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{
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friend class glShader;
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public:
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glShaderObject(int type);
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~glShaderObject();
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int load(char* filename); //!< read file, if result is 0 everything is ok. -1: File not found, -2: Empty File, -3: no memory
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void loadFromMemory(const char* program); //!< load program from char array, make sure program is 0 terminated!
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bool compile(void); //!< compile program
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char* getCompilerLog(void); //!< get compiler messages
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GLint getAttribLocation(char* attribName); //!< returns Attribute Location. Specify attribute name.
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std::string program_str;
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protected:
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int program_type; //!< 1=Vertex Program, 2=Fragment Program, 0=none
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GLuint ShaderObject; //!< Program Object
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GLubyte* ShaderSource; //!< ASCII Source-Code
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GLcharARB* compiler_log;
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bool is_compiled; //!< true if compiled
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bool _memalloc; //!< true if shader allocated memory
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};
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//-----------------------------------------------------------------------------
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class glShader
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{
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public:
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glShader();
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virtual ~glShader();
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void addShader(glShaderObject* ShaderProgram); //!< add a Vertex or Fragment Program
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bool link(void); //!< Link all Shaders
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char* getLinkerLog(void); //!< get Linker messages
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void begin(); //!< use Shader. OpenGL calls will go through shader.
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void end(); //!< Stop using this shader. OpenGL calls will go through regular pipeline.
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bool enabled;
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// Uniform Variables
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bool setUniform1f(char* varname, GLfloat v0); //!< set float uniform to program
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bool setUniform2f(char* varname, GLfloat v0, GLfloat v1); //!< set vec2 uniform to program
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bool setUniform3f(char* varname, GLfloat v0, GLfloat v1, GLfloat v2); //!< set vec3 uniform to program
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bool setUniform4f(char* varname, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3); //!< set vec4 uniform to program
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bool setUniform1i(char* varname, GLint v0);
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bool setUniform2i(char* varname, GLint v0, GLint v1);
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bool setUniform3i(char* varname, GLint v0, GLint v1, GLint v2);
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bool setUniform4i(char* varname, GLint v0, GLint v1, GLint v2, GLint v3);
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bool setUniform1fv(char* varname, GLsizei count, GLfloat *value);
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bool setUniform2fv(char* varname, GLsizei count, GLfloat *value);
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bool setUniform3fv(char* varname, GLsizei count, GLfloat *value);
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bool setUniform4fv(char* varname, GLsizei count, GLfloat *value);
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bool setUniform1iv(char* varname, GLsizei count, GLint *value);
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bool setUniform2iv(char* varname, GLsizei count, GLint *value);
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bool setUniform3iv(char* varname, GLsizei count, GLint *value);
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bool setUniform4iv(char* varname, GLsizei count, GLint *value);
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bool setUniformMatrix2fv(char* varname, GLsizei count, GLboolean transpose, GLfloat *value);
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bool setUniformMatrix3fv(char* varname, GLsizei count, GLboolean transpose, GLfloat *value);
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bool setUniformMatrix4fv(char* varname, GLsizei count, GLboolean transpose, GLfloat *value);
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// Receive Uniform variables:
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void GetUniformfv(char* name, GLfloat* values);
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void GetUniformiv(char* name, GLint* values);
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// Vertex Attributes
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bool setVertexAttrib1f(GLuint index, GLfloat v0);
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bool setVertexAttrib2f(GLuint index, GLfloat v0, GLfloat v1);
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bool setVertexAttrib3f(GLuint index, GLfloat v0, GLfloat v1, GLfloat v2);
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bool setVertexAttrib4f(GLuint index, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
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void manageMemory(void){_mM = true;}
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void enable(void)
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{
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_noshader = true;
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}
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void disable(void)
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{
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_noshader = false;
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}
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private:
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GLint GetUniLoc(const GLcharARB *name); // get location of a variable
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GLuint ProgramObject; // GLProgramObject
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GLcharARB* linker_log;
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bool is_linked;
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std::vector<glShaderObject*> ShaderList; // List of all Shader Programs
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bool _mM;
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bool _noshader;
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};
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//-----------------------------------------------------------------------------
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// To simplify the process loading/compiling/linking shaders I created this
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// high level interface to setup a vertex/fragment shader.
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//
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// Example:
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// /*LOAD:*/
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// glShaderManager SM;
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// glShader* shader = SM.loadfromFile("test.vert","test.frag");
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// if (shader==0) cout << "Error Loading, compiling or linking shader\n";
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// /*DRAW:*/
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// shader->begin();
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// shader->setUniform1f("MyFloat", 1.123);
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// glutDrawSolidSphere(1.0);
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// shader->end();
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//
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class glShaderManager
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{
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public:
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glShaderManager();
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virtual ~glShaderManager();
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glShader* loadfromFile(char* vertexFile, char* fragmentFile, char* tesscontrolFile, char* tessevalFile, char* geometryFile); // load vertex/fragment shader from file
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glShader* loadfromMemory(char* vertexMem, char* fragmentMem, char* tesscontrolMem, char* tessevalMem, char* geometryMem);
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bool free(glShader* o);
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private:
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std::vector<glShader*> _shaderObjectList;
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};
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#endif // A_GLSL_H
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