/* Simple case for reporting GL bugs */
/* Wei Wang <wei.z.wang@intel.com    */

#include "GL/glut.h"
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

#define WIN_WIDTH 128
#define WIN_HEIGHT 128


#define MAX_STRIDE 128
static GLfloat vbuf[] = {5.5, 6.5, 5.5, 12.5, 10.5, 6.5, 10.5, 12.5};
static GLuint  elemList[] = {3, 2, 0, 1}; 


void init()
{
   glDisable(GL_DITHER);

   glVertexPointer (2, GL_FLOAT, 0, vbuf);
   glEnableClientState (GL_VERTEX_ARRAY);
   glEnableClientState (GL_COLOR_ARRAY);
}


void test(){

   char buf[16];
   GLuint array_id[2];
   int i;

   glGenBuffersARB(2, array_id);
   glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);


   glVertexPointer (2, GL_FLOAT, 0, vbuf);
   glEnableClientState (GL_VERTEX_ARRAY);

   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, array_id[1]);
   glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 4 * sizeof(GLuint),
	 elemList, GL_STATIC_DRAW_ARB);

   glBindBufferARB(GL_ARRAY_BUFFER_ARB, array_id[0]);
   glColorPointer (3, GL_BYTE, 0, 0);
   glEnableClientState (GL_COLOR_ARRAY);


   for (i = 0; i < 16; i++)
      buf[i] = 0;
   glBufferDataARB(GL_ARRAY_BUFFER_ARB,
	    MAX_STRIDE * 4 * sizeof(char),
	    buf, GL_STATIC_DRAW_ARB);


   glClear (GL_COLOR_BUFFER_BIT);
   glNewList(1, GL_COMPILE);
   glDrawElements (GL_QUADS, 4, GL_UNSIGNED_INT, 0);
   glEndList ();                           
   glCallList (1);            
   glDeleteLists (1, 1); 

   exit(0);
}

void display()
{
   glViewport(0, 0, WIN_WIDTH, WIN_HEIGHT);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   gluOrtho2D(0, WIN_WIDTH, 0, WIN_HEIGHT);
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();

   test();
}



int main(int argc, char** argv)
{
   glutInit(&argc, argv);
   glutInitDisplayMode (GLUT_SINGLE | GLUT_RGBA);
   glutInitWindowSize (WIN_WIDTH, WIN_HEIGHT);
   glutInitWindowPosition (100, 100);
   glutCreateWindow ("hello");
   init();
   glutDisplayFunc(display);
   glutMainLoop();
}