/* A texture-mapped quad, coded in plain C++.

Written by Scott D. Anderson
scott.anderson@acm.org
Fall 2007

*/

#include <stdio.h>
#include "tw-fake.h"

void display(void) {
    twError();
    twDisplayInit();
    twCamera();

    glPushAttrib(GL_ALL_ATTRIB_BITS);

    glEnable(GL_TEXTURE_2D);
    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
    twError();

    const int Size = 5;         // Size of the flag fragment

    glBegin(GL_QUADS);
    glTexCoord2f(0,1); glVertex3f(-Size,0,0);
    glTexCoord2f(1,1); glVertex3f(+Size,0,0);
    glTexCoord2f(1,0); glVertex3f(+Size,Size,0);
    glTexCoord2f(0,0); glVertex3f(-Size,Size,0);
    glEnd();
    twError();

    glPopAttrib();
    glFlush();
    glutSwapBuffers();
}

int main(int argc, char** argv) {
  glutInit(&argc, argv);
  glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
  twInitWindowSize();
  glutCreateWindow(argv[0]);
  twError();
  glutDisplayFunc(display);
  twError();
  flaginit();
  glutMainLoop();
  return 0;
}