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

#define WINDSIZEX 100
#define WINDSIZEY 100
#define SIZEX 4
#define SIZEY 1



void init(void)
{
   int i;
   GLfloat white[] = {1.0, 1.0, 1.0, 1.0};

   glClearColor(0.0, 0.0, 0.0, 1.0);
   glColor4fv(white);
   glDisable(GL_DITHER);
}



static void test(void)
{    
   GLint val;

   glClear(GL_COLOR_BUFFER_BIT);

   glStencilFuncSeparate(GL_FRONT, GL_LEQUAL, 12, 0xf);
   glStencilFuncSeparate(GL_BACK, GL_GEQUAL, 13, 0xe);
   glGetIntegerv(GL_STENCIL_BACK_FUNC, &val);
   if (val != GL_GEQUAL) {
	printf("glStencilFuncSeparate not correct\n");
   }
}

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 | GLUT_STENCIL);
   glutInitWindowSize(WINDSIZEX, WINDSIZEY);
   glutInitWindowPosition(100, 100);
   glutCreateWindow(argv[0]);
   init();
   glutDisplayFunc(display);
   glutMainLoop();
   return 0; 
}