main.c

#include <unistd.h>
#include <math.h>
#include "ima.h"
Image *image;

#define ESCAPE 27

void Keyboard(unsigned char key, int x, int y)
{
  switch (key)
  {
  case ESCAPE:
    exit(0);
    break;
  default:
    fprintf(stderr, "Unused key\n");
  }
}

void Mouse(int button, int state, int x, int y)
{

  switch (button)
  {
  case GLUT_LEFT_BUTTON:
    break;
  case GLUT_MIDDLE_BUTTON:
    break;
  case GLUT_RIGHT_BUTTON:
    break;
  }
  glutPostRedisplay();
}

int Init(char *s)
{

  image = (Image *)malloc(sizeof(Image));
  if (image == NULL)
  {
    fprintf(stderr, "Out of memory\n");
    return (-1);
  }
  if (ImageLoad_PPM(s, image) == -1)
    return (-1);
  printf("tailles %d %d\n", (int)image->sizeX, (int)image->sizeY);

  glClearColor(0.0, 0.0, 0.0, 0.0);
  glShadeModel(GL_FLAT);
  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  glutReshapeWindow(image->sizeX, image->sizeY);

  return (0);
}

int ReInit()
{

  glClearColor(0.0, 0.0, 0.0, 0.0);
  glShadeModel(GL_FLAT);
  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  glutReshapeWindow(image->sizeX, image->sizeY);

  return (0);
}

void Display(void)
{

  glClear(GL_COLOR_BUFFER_BIT);

  glDrawPixels(image->sizeX, image->sizeY, GL_RGB, GL_UNSIGNED_BYTE,
               image->data);

  glFlush();
}

void Reshape(int w, int h)
{
  glViewport(0, 0, (GLsizei)w, (GLsizei)h);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluOrtho2D(0.0, (GLdouble)w, 0.0, (GLdouble)h);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
}

void menuFunc(int item)
{
  char s[256];

  switch (item)
  {
  case 0:
    free(image);
    exit(0);
    break;
  case 1:
    printf("compression\n");
    compression(image, 4);
    printf("Taille de l image : %d %d\n", (int)image->sizeX, (int)image->sizeY);
    Display();
    break;
  case 2:
    printf("Entrer le nom pour l'image à sauvegarder (avec l'extension)\n");
    scanf("%s", &s[0]);
    imagesave_PPM(s, image);
    break;
  case 3:
    printf("Taille de l image : %d %d\n", (int)image->sizeX, (int)image->sizeY);
    break;
  case 4:
    décompression(image);
    Display();
    printf("décompression : \n");
  default:
    break;
  }
}

int main(int argc, char **argv)
{

  if (argc < 2)
  {
    fprintf(stderr, "Usage : palette nom_de_fichier\n");
    exit(0);
  }

  glutInit(&argc, argv);
  glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
  glutInitWindowSize(640, 480);
  glutInitWindowPosition(100, 100);
  glutCreateWindow("VPUP8");

  Init(argv[1]);

  glutCreateMenu(menuFunc);
  glutAddMenuEntry("Quit", 0);
  glutAddMenuEntry("compression", 1);
  glutAddMenuEntry("Sauver", 2);
  glutAddMenuEntry("Informations", 3);
  glutAddMenuEntry("tab", 4);
  glutAttachMenu(GLUT_LEFT_BUTTON);

  glutDisplayFunc(Display);
  glutReshapeFunc(Reshape);
  glutKeyboardFunc(Keyboard);

  glutMouseFunc(Mouse);

  glutMainLoop();

  return 1;
}