void SDGF_Image::load_pcx(const char *name,SDGF_Canvas &Canvas)
{
 FILE *target;
 unsigned long int width,heigth,index,position,length,uncompressed_length;
 unsigned char repeat;
 unsigned char *original;
 unsigned char *uncompressed;
 PCX_head head;
 target=fopen(name,"rb");
 if(target==NULL)
 {
  puts("Can't open a image file");
  exit(EXIT_FAILURE);
 }
 fseek(target,0,SEEK_END);
 length=ftell(target)-128;
 rewind(target);
 fread(&head,128,1,target);
 if(head.color*head.planes!=24)
 {
  puts("Incorrect image format");
  exit(EXIT_FAILURE);
 }
 if(head.compress!=1)
 {
  puts("Incorrect image format");
  exit(EXIT_FAILURE);
 }
 width=head.max_x-head.min_x+1;
 heigth=head.max_y-head.min_y+1;
 uncompressed_length=3*width*heigth;
 index=0;
 position=0;
 original=(unsigned char*)calloc(length,1);
 if(original==NULL)
 {
  puts("Can't allocate memory for image buffer");
  exit(EXIT_FAILURE);
 }
 uncompressed=(unsigned char*)calloc(uncompressed_length,1);
 if(uncompressed==NULL)
 {
  puts("Can't allocate memory for image buffer");
  exit(EXIT_FAILURE);
 }
 fread(original,length,1,target);
 fclose(target);
 while (index<length)
 {
  if (original[index]<192)
  {
   uncompressed[position]=original[index];
   position++;
   index++;
  }
  else
  {
   for (repeat=original[index]-192;repeat>0;repeat--)
   {
    uncompressed[position]=original[index+1];
    position++;
   }
   index+=2;
  }

 }
 free(original);
 Canvas.load_image(uncompressed,width,heigth);
 free(uncompressed);
}
void SDGF_Canvas::load_image(const unsigned char *buffer,const unsigned long int image_width,const unsigned long int image_height)
{
 unsigned long int length;
 length=image_width*image_height*3;
 width=image_width;
 height=image_height;
 if(image!=NULL) free(image);
 image=(SDGF_Color*)calloc(length,1);
 if (image==NULL)
 {
  puts("Can't allocate memory for image buffer");
  exit(EXIT_FAILURE);
 }
 memmove(image,buffer,length);
}
struct SDGF_Color
{
 unsigned char blue:8;
 unsigned char green:8;
 unsigned char red:8;
};