#define GL_GLEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>
#include <stdlib.h>
#include <stdio.h>

void init(void)
{
	glEnable(GL_MINMAX_EXT);
	if (glGetError() == GL_INVALID_ENUM) printf("glEnable: invalid enum 'GL_MINMAX_EXT'\n");

	glEnable(GL_HISTOGRAM);
	if (glGetError() == GL_INVALID_ENUM) printf("glEnable: invalid enum 'GL_HISTOGRAM'\n");

	/*
	glConvolutionFilter1D(GL_CONVOLUTION_1D, GL_RGB8, 4, GL_RGB, GL_FLOAT, cf);
	glSeparableFilter2D(GL_SEPARABLE_2D, GL_RGB8, 2, 2, GL_RGB, GL_FLOAT, sf_a, sf_b);

	ct = ([0]*3+[1]*3+[0]*3+[1]*3).pack("f*")
  glColorTable(GL_COLOR_TABLE, GL_RGB8, 4, GL_RGB, GL_FLOAT, ct)
  */
}


int main(int argc, char** argv)
{
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
	glutInitWindowSize (500, 500);
	glutInitWindowPosition (100, 100);
	glutCreateWindow(argv[0]);
	init();
	return 0;
}