+static boolean CheckIfImageContainsSmallImages(ImageInfo *img_info,
+ int tile_size)
+{
+ if (!img_info->contains_small_images)
+ return FALSE;
+
+ // at this point, small images already exist for this image;
+ // now do some checks that may require re-creating small (or in-game) images
+
+ // special case 1:
+ //
+ // check if the configured tile size for an already loaded image has changed
+ // from one level set to another; this should usually not happen, but if a
+ // custom artwork set redefines classic (or default) graphics with wrong tile
+ // size (by mistake or by intention), it will be corrected to its original
+ // tile size here by forcing complete re-creation of all small images again
+
+ if (!strEqual(img_info->leveldir, leveldir_current->identifier) &&
+ img_info->conf_tile_size != tile_size)
+ {
+ int bitmap_nr = GET_BITMAP_ID_FROM_TILESIZE(img_info->conf_tile_size);
+ int i;
+
+ // free all calculated, resized bitmaps, but keep last configured size
+ for (i = 0; i < NUM_IMG_BITMAPS; i++)
+ {
+ if (i == bitmap_nr)
+ continue;
+
+ if (img_info->bitmaps[i])
+ {
+ FreeBitmap(img_info->bitmaps[i]);
+
+ img_info->bitmaps[i] = NULL;
+ }
+ }
+
+ // re-create small bitmaps from last configured size as new default size
+ if (bitmap_nr != IMG_BITMAP_STANDARD)
+ {
+ img_info->bitmaps[IMG_BITMAP_STANDARD] = img_info->bitmaps[bitmap_nr];
+ img_info->bitmaps[bitmap_nr] = NULL;
+ }
+
+ img_info->contains_small_images = FALSE;
+
+ return FALSE;
+ }
+
+ // special case 1 (continued):
+ //
+ // if different tile sizes are used in same image file (usually by mistake,
+ // like forgetting option ".tile_size" for one or more graphic definitions),
+ // make sure to use only the first tile size that is processed for this image
+ // (and ignore all subsequent, potentially different tile size definitions
+ // for this image within the current level set by disabling the above check)
+
+ setString(&img_info->leveldir, leveldir_current->identifier);
+
+ // special case 2:
+ //
+ // graphic config setting "game.tile_size" has changed since last level set;
+ // this may require resizing image to new size required for in-game graphics
+
+ if (img_info->game_tile_size != gfx.game_tile_size)
+ {
+ ReCreateGameTileSizeBitmap(img_info->bitmaps);
+
+ img_info->game_tile_size = gfx.game_tile_size;
+ }
+
+ return TRUE;
+}
+