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| #include <GL/glut.h>
#include <stdio.h>
#include <jpeglib.h>
#include <jerror.h>
#include <stdlib.h>
unsigned char image[800*600*3];
unsigned char texture[800][600][3];
unsigned char rouge[800][600][3],vert[800][600][3],bleu[800][600][3];
void affichage();
void displayEye();
void loadJpegImage(char *fichier);
int main(int argc,char **argv)
{
loadJpegImage("paysage.jpg");
/* initialisation de glut et creation
de la fenetre */
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_RGB);
glutInitWindowPosition(250,100);
glutInitWindowSize(800,600);
glutCreateWindow("Lunette 3D");
/* Initialisation d'OpenGL */
glClearColor(0.0,0.0,0.0,0.0);
glShadeModel(GL_FLAT);
glColor3f(1.0,1.0,1.0);
glPointSize(1.0);
/* enregistrement des fonctions de rappel */
glutDisplayFunc(affichage);
/* Entree dans la boucle principale glut */
glutMainLoop();
return 0;
}
void affichage()
{
/* effacement de l'image avec la couleur de fond */
glClear(GL_COLOR_BUFFER_BIT | GL_ACCUM_BUFFER_BIT);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D,0,GL_RGB,800,600,0,GL_RGB,GL_UNSIGNED_BYTE,rouge);
glEnable(GL_TEXTURE_2D);
//glColorMask(1,0,0,1);
displayEye();
glTranslatef(0.02,0,0);
glTexImage2D(GL_TEXTURE_2D,0,GL_RGB,800,600,0,GL_RGB,GL_UNSIGNED_BYTE,bleu);
glColorMask(0,1,1,1);
displayEye();
/* on force l'affichage du resultat */
glFlush();
}
void displayEye(void){
/* Dessin du polygone */
glBegin(GL_POLYGON);
//glColor3f(1.0,0.0,0.0);
glTexCoord2i(0,1);glVertex2f(-1,-1);
//glColor3f(0.0,1.0,0.0);
glTexCoord2i(1,1);glVertex2f(1,-1);
//glColor3f(0.0,0.0,1.0);
glTexCoord2i(1,0);glVertex2f(1,1);
//glColor3f(1.0,1.0,1.0);
glTexCoord2i(0,0);glVertex2f(-1,1);
glEnd();
}
void loadJpegImage(char *fichier)
{
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
FILE *file;
unsigned char *ligne;
int i,j;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);
if ((file=fopen(fichier,"rb"))==NULL)
{
fprintf(stderr,"Erreur : impossible d'ouvrir le fichier texture.jpg\n");
exit(1);
}
jpeg_stdio_src(&cinfo, file);
jpeg_read_header(&cinfo, TRUE);
if ((cinfo.image_width!=800)||(cinfo.image_height!=600)) {
fprintf(stdout,"Erreur : l'image doit etre de taille 800x600\n");
exit(1);
}
if (cinfo.jpeg_color_space==JCS_GRAYSCALE) {
fprintf(stdout,"Erreur : l'image doit etre de type RGB\n");
exit(1);
}
jpeg_start_decompress(&cinfo);
ligne=image;
while (cinfo.output_scanline<cinfo.output_height)
{
ligne=image+3*800*cinfo.output_scanline;
jpeg_read_scanlines(&cinfo,&ligne,1);
}
jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
for (i=0;i<800;i++){
for (j=0;j<600;j++) {
//image RVB
texture[i][j][0]=image[i*600*3+j*3];
texture[i][j][1]=image[i*600*3+j*3+1];
texture[i][j][2]=image[i*600*3+j*3+2];
//image rouge
rouge[i][j][0]=image[i*600*3+j*3];
//image verte
vert[i][j][1]=image[i*600*3+j*3+1];
//image bleu
bleu[i][j][2]= image[i*600*3+j*3+2];
}
}
} |
