/*
 * glsl.h
 *
 *  Created on: 12 sept. 2011
 *      Author: laurent
 */

#ifndef GLSL_H_
#define GLSL_H_

#define GL3_PROTOTYPES 1
#include "GL3/gl3.h"

#define GLSL_VERTEX   0
#define GLSL_COLOR    1
#define GLSL_TEXCOORD 2
#define GLSL_NORMAL   3

typedef struct {
    GLuint programID;
    GLuint vertexID;
    GLuint fragmentID;

    //glsl_value *_value;
	GLboolean  asVertex;
	GLboolean  asColor;
	GLboolean  asTexcoord;
	GLboolean  asNormal;
} glsl;

glsl * GLSLInit(const char *vertexSource, const char *fragmentSource);

void GLSLUseProgram(glsl *shader);
void GLSLClearProgram(glsl *shader);

void GLSLFree(glsl *);


#define GLSLUniform4fv(shader,name,qty,data) \
	glUniform4fv(glGetUniformLocation(shader->programID, name), qty, data)
#define GLSLUniform3fv(shader,name,qty,data) \
	glUniform3fv(glGetUniformLocation(shader->programID, name), qty, data)
#define GLSLUniform1fv(shader,name,qty,data) \
	glUniform1fv(glGetUniformLocation(shader->programID, name), qty, data)
#define GLSLUniformMatrix4fv(shader,name,qty,data) \
	glUniformMatrix4fv(glGetUniformLocation(shader->programID, name), qty, GL_TRUE, data)
#define GLSLUniformMatrix3fv(shader,name,qty,data) \
	glUniformMatrix3fv(glGetUniformLocation(shader->programID, name), qty, GL_TRUE, data)

typedef enum {
	t4fv,
	t1fv,
	tMatrix4fv
} glsl_type;

typedef struct _glslv {
	char      *name;
	glsl_type  type;
	int        qty;
	void      *data;
	struct _glslv *next;
} glsl_value;

typedef struct {
	struct _glslv *_value;
} glslStack;


glslStack * glslStackInit();
void GLSLUseStack(glslStack *st, glsl *shader);

void GLSLStackUniform4fv(glslStack *st, char *name, int qty, GLfloat *data);
void GLSLStackUniform1fv(glslStack *st, char *name, int qty, GLfloat *data);
void GLSLStackUniformMatrix4fv(glslStack *st, char *name, int qty, GLfloat *data);

void GLSLStackUniformPrint(glslStack *st);
void GLSLStackFree(glslStack *st);

#endif /* GLSL_H_ */