#include <stdlib.h>
#include <GL/glut.h>
#include <pic.h>

void save (char *filename) {
  int i, j;
  Pic *in = NULL;

  if (filename == NULL)
    return;

  /* Allocate a picture buffer */
  in = pic_alloc(640, 480, 3, NULL);

  printf("File to save to: %s\n", filename);

  for (i=479; i>=0; i--) {
    glReadPixels(0, 479-i, 640, 1, GL_RGB, GL_UNSIGNED_BYTE,
                 &in->pix[i*in->nx*in->bpp]);
  }

  if (jpeg_write(filename, in))
    printf("File saved Successfully\n");
  else
    printf("Error in Saving\n");

  pic_free(in);
}