#include <GL/glut.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>

#define WINDSIZEX 100
#define WINDSIZEY 100

GLuint shader, program;
GLint compiled, linked;

const GLchar *shaderSrc[] = {
   "void main() \n"
        "{ \n"
        "    gl_FragColor = gl_Color; \n"
        "} \n"
};

void init(void)
{
   shader = glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB);
   glShaderSourceARB(shader, 1, shaderSrc, NULL);
   program = glCreateProgramObjectARB();
   glAttachObjectARB(program, shader);
   glCompileShaderARB(shader);
   glGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB, &compiled);
   
   if (!compiled) {
       GLint length;
       GLchar* log;
//       glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length);

       log = (GLchar*)malloc(1024);
       glGetInfoLogARB(shader, 1024, &length, log);
       printf("compile log = %s\n", log);
   }else
       printf("success\n");
}

void initi1(void)
{
   program = glCreateProgram();
   shader = glCreateShader(GL_FRAGMENT_SHADER);
   glAttachShader(program, shader);
   glShaderSource(shader, 1, shaderSrc, NULL);
   glCompileShader(shader);
   glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
   
   if (!compiled) {
       GLint length;
       GLchar* log;
       glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length);

       log = (GLchar*)malloc(length);
       glGetShaderInfoLog(shader, length, &length, log);
       printf("compile log = %s\n", log);
   }else
       printf("success\n");
}

static void test(void)
{  
}

void display(void)
{
    glViewport(0, 0, WINDSIZEX, WINDSIZEY);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(0, WINDSIZEX, 0, WINDSIZEY);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    test();
}

int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(WINDSIZEX, WINDSIZEY);
    glutInitWindowPosition(100, 100);
    glutCreateWindow(argv[0]);
    init();
    glutDisplayFunc(display);
    glutMainLoop();
    return 0; 
}