7006df5f
 David Mayerich
reformat of direc...
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#ifndef RTS_GLSHADERS
#define RTS_GLSHADERS
#include <GL/glew.h>
//#include "windows.h"
#include <GL/gl.h>
#include "rtsSourceCode.h"
class rts_glShaderObject
{
private:
void init()
{
id = 0;
compiled = false;
type = GL_FRAGMENT_SHADER;
}
public:
bool compiled;
GLenum type;
rtsSourceCode source;
GLuint id;
string log;
rts_glShaderObject(GLenum type, const char* filename)
{
init(); //initialize the shader
SetType(type); //set the shader type
LoadSource(filename); //load the source code
}
rts_glShaderObject(GLenum type, rtsSourceCode sourceCode)
{
init(); //initialize the shader
SetType(type); //set the shader type
source = sourceCode;
}
rts_glShaderObject()
{
init();
}
rts_glShaderObject(GLenum type)
{
init();
SetType(type);
}
void LoadSource(const char* filename)
{
source = rtsSourceCode(filename); //get the shader source code
}
void SetType(GLenum type)
{
if(id != 0) //if a shader currently exists, delete it
{
glDeleteShader(id);
id = 0;
}
type = type;
id = glCreateShader(type); //create a shader object
if(id == 0) //if a shader was not created, log an error
{
log = "Error getting shader ID from OpenGL";
return;
}
}
void UploadSource()
{
//create the structure for the shader source code
GLsizei count = source.source.size();
GLchar** code_string = new GLchar*[count];
GLint* length = new GLint[count];
for(int l = 0; l<count; l++) //for each line of code
{
length[l] = source.source[l].size();
code_string[l] = new GLchar[length[l]]; //copy the string into a new structure
source.source[l].copy(code_string[l], (unsigned int)length[l]);
}
glShaderSource(id, count, (const GLchar**)code_string, length); //attach the shader source
}
void Compile()
{
/*
This function compiles the shader source code, records any errors to a log, and sets the compiled flag.
*/
//send the source code to the GPU
UploadSource();
//compile the shader
glCompileShader(id); //compile the shader
GLint compile_status;
glGetShaderiv(id, GL_COMPILE_STATUS, &compile_status); //get the compile status
if(compile_status != GL_TRUE) //if there was an error
{
GLchar buffer[1000]; //create a log buffer
GLsizei length;
glGetShaderInfoLog(id, 1000, &length, buffer); //get the log
log = buffer;
compiled = false;
}
else
compiled = true;
}
void PrintLog()
{
cout<<log;
if(log.size() != 0) cout<<endl;
}
void Clean(){if(id != 0) glDeleteShader(id);}
};
#endif
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