500     struct pt_png_img _img, *img = &_img;

   500     struct pt_png_img _img, *img = &_img;

   501     struct pt_tile_info *ti = &tile->info;

   501     struct pt_tile_info *ti = &tile->info;

   502     int err;

   502     int err;

   503 

   503 

   504     // init img

   504     // init img

   507 

   506 

   508     // check within bounds

   507     // check within bounds

   509     if (ti->x >= header->width || ti->y >= header->height)

   508     if (ti->x >= header->width || ti->y >= header->height)

   510         // completely outside

   509         // completely outside

   511         RETURN_ERROR(PT_ERR_TILE_CLIP);

   510         RETURN_ERROR(PT_ERR_TILE_CLIP);