// draw bitmap sample on OpenGL
//
// Last updated: <2024/01/13 05:33:02 +0900>

#include <windows.h>
#include <stdio.h>
#include <GL/gl.h>
#include <GL/freeglut.h>

// include bitmap pattern
#include "image_32x32.h"
#include "image_lena.h"

void display(void)
{
  GLfloat xorig, yorig, xmove, ymove;
  GLsizei w, h;

  glClearColor(0.0, 0.0, 0.0, 0.0);
  glClear(GL_COLOR_BUFFER_BIT);

  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

  // draw arrow
  glColor4f(1, 1, 1, 1);     // set color
  glRasterPos2f(-0.5, -0.5); // set position
  xorig = 0.0;
  yorig = 0.0;
  xmove = 0.0;
  ymove = 0.0;
  w = image_32x32_width;
  h = image_32x32_height;
  glBitmap(w, h, xorig, yorig, xmove, ymove, image_32x32); // draw bitmap

  // draw lena
  glColor4f(1.0, 0.8, 0.5, 1);
  glRasterPos2f(0.0, 0.0);
  xorig = 0.0;
  yorig = 0.0;
  xmove = 0.0;
  ymove = 0.0;
  w = image_lena_width;
  h = image_lena_height;
  glBitmap(w, h, xorig, yorig, xmove, ymove, image_lena);

  glFlush();
}

void keyboard(unsigned char key, int x, int y)
{
  switch (key)
  {
  case '\x1B':
  case 'q':
    // Exit on escape or 'q' key press
    glutLeaveMainLoop();
    // exit(EXIT_SUCCESS);
    break;
  }
}

int main(int argc, char **argv)
{
  glutInit(&argc, argv);
  glutInitWindowSize(512, 288);
  glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA | GLUT_DEPTH);

  glutCreateWindow("glBitmap sample");
  glutKeyboardFunc(keyboard);
  glutDisplayFunc(display);

  glutMainLoop();
  return EXIT_SUCCESS;
}