/* See fvw_GL.h */
/* Last edited on 2025-01-20 14:25:17 by stolfi */

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <values.h>
#include <assert.h>

#define __APPLE__ 0
#include <glu.h>
#include <glut.h>

#include <bool.h>

#include <fvw_GL.h>

void fvw_GL_initialize_libraries(int *argc, char** argv)
  { 
    glutInitWindowPosition(fvw_GL_default_window_corner_H, fvw_GL_default_window_corner_V);
    glutInitWindowSize(fvw_GL_default_window_HSize, fvw_GL_default_window_VSize);
    glutInit(argc, argv);
  }
  
void fvw_GL_initialize_window
  ( char *title,
    void display(void),
    void reshape(int width, int height),
    void keyboard(unsigned char key, int x, int y),
    void passivemouse(int x, int y),
    void activemouse(int x, int y),
    void special(int key, int x, int y)
  )
  { 
    /* Setup window parameters: */
    glutInitDisplayMode(GLUT_RGB|GLUT_DEPTH|GLUT_DOUBLE);

    /* Create window: */
    bool_t success = glutCreateWindow(title);
    if (!success) 
      { fprintf(stderr, "Error opening main window\n"); exit(1); }

    /* Setup graphics modes: */
    glShadeModel(GL_FLAT);
    glEnable(GL_DEPTH_TEST);
    glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
    glLightModeli(GL_LIGHT_MODEL_TWO_SIDE,1);

    /* Register event handling methods: */
    glutKeyboardFunc(keyboard);
    glutMotionFunc(activemouse);
    glutPassiveMotionFunc(passivemouse);
    glutSpecialFunc(special);
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
  }
  
void fvw_GL_start_viewing(void)
  { 
    /* Start displaying: */
    glutMainLoop();
  }