/* Auteur: Nicolas JANEY               */
/* nicolas.janey@univ-fcomte.fr        */
/* Decembre 2005                       */
/* Une facette texture avec un damier  */

#include <math.h>
#include <stdio.h>
#include <stdlib.h>

#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>

#include "ModuleManipulateur.h"
#include "ModuleMenus.h"
#include "ModuleReshape.h"

static GLbyte *image1 ;
static GLbyte *image2 ;
static int w2 ;
static int h2 ;
static int mode = 0;
static int deff = 0;
static int f1;
static int f2;

GLbyte *makeImage1() {
  GLbyte *img =(GLbyte *) calloc(2*2*3,sizeof(GLbyte));
  img[2] = img[3] = img[4] = img[6] = img[10] =(GLbyte) 0xFF;
  return(img);
}

GLbyte *makeImage2() {
  GLbyte *img =(GLbyte *) calloc(8*8*3,sizeof(GLbyte));
  for ( int l = 0 ; l < 8 ; l++ )
    for ( int c = 0 ; c < 8 ; c++ )
      if ( (l+c)%2 == 1 )
        img[(l*8+c)*3] = img[(l*8+c)*3+1] = img[(l*8+c)*3+2] =(GLbyte) 0xFF;
  return(img);
}

void display2() {
  glClear(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT);
  glPushMatrix();
  glRasterPos2i(w2/2-32,h2/2+32);
  if ( mode ) {
    glPixelZoom(8.0F,-8.0F);
    glDrawPixels(8,8,GL_RGB,GL_UNSIGNED_BYTE,image2); }
    else {
    glPixelZoom(32.0F,-32.0F);
    glDrawPixels(2,2,GL_RGB,GL_UNSIGNED_BYTE,image1); }
  glPopMatrix();
  glutSwapBuffers();
}

void reshape2(int w,int h) {
  w2 = w;
  h2 = h;
  glViewport(0,0,w,h);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  glOrtho(0,w,0,h,-1.0,1.0); 
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
}

void display1() {
  glClear(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT);
  if ( mode ) 
    glTexImage2D(GL_TEXTURE_2D,0,3,8,8,0,GL_RGB,GL_UNSIGNED_BYTE,image2);
    else
    glTexImage2D(GL_TEXTURE_2D,0,3,2,2,0,GL_RGB,GL_UNSIGNED_BYTE,image1);
  glPushMatrix();
  manipulateurSouris();
  manipulateurClavier();
  glBegin(GL_QUADS);
  glTexCoord2f(0.0F,0.99F);
  glVertex2f(-1.0F,-0.75F);
  glTexCoord2f(0.0F,0.0F);
  glVertex2f(-1.0F,0.75F);
  glTexCoord2f(( deff == 0 ) ? 1.333333F : 1.0F,0.0F);
  glVertex2f(1.0F,0.75F);
  glTexCoord2f(( deff == 0 ) ? 1.333333F : 1.0F,0.99F);
  glVertex2f(1.0F,-0.75F);
  glEnd();
  glPopMatrix();
  glutSwapBuffers();
}

void postRedisplay(void) {
  glutPostWindowRedisplay(f1);
  glutPostWindowRedisplay(f2);
}

void key(unsigned char key,int x,int y) {
  if ( keyManipulateur(key,x,y) )
    postRedisplay();
    else
    switch ( key ) {
      case ' '  : deff = !deff;
                  postRedisplay();
                  break;
      case 0x0D : mode = !mode;
                  postRedisplay();
                  break; }
}

void myInit1() {
  image1 = makeImage1();
  image2 = makeImage2();
  glClearColor(0.75F,0.75F,0.75F,1.0F);
  glPixelStorei(GL_UNPACK_ALIGNMENT,1); 
  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST); 
  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST); 
  glEnable(GL_TEXTURE_2D);
  glEnable(GL_DEPTH_TEST);
  glEnable(GL_LIGHTING);
  glEnable(GL_LIGHT0);
  glEnable(GL_AUTO_NORMAL);
  glEnable(GL_NORMALIZE);
}

void myInit2() {
  glPixelStorei(GL_UNPACK_ALIGNMENT,1); 
  glEnable(GL_DEPTH_TEST);
  glEnable(GL_LIGHTING);
  glEnable(GL_LIGHT0);
}

int main(int argc,char **argv) {
  glutInit(&argc,argv);
  { glutInitWindowSize(300,250);
    glutInitWindowPosition(50,50);
    glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
    f1 = glutCreateWindow("Rectangle texture");
    creationMenuBasique();
    myInit1();
    setParametresOrthoBasique(-1.5,1.5,-1.5,1.5,-50.0,50.0);
    setManipulateurDistance(10.0F);
    glutReshapeFunc(reshapeOrthoBasique);
    glutDisplayFunc(display1);
    glutKeyboardFunc(key);
    glutSpecialFunc(specialBasique);
    glutMotionFunc(motionBasique);
    glutMouseFunc(sourisBasique); }
  { glutInitWindowPosition(450,100);
    glutInitWindowSize(150,150);
    f2 = glutCreateWindow("Texture");
    creationMenuBasique();
    myInit2();
    glutKeyboardFunc(key);
    glutSpecialFunc(specialBasique);
    glutDisplayFunc(display2);
    glutReshapeFunc(reshape2); }
  glutMainLoop();
  return(0);
}