Improve readme

Remove 3 letter decode.

README.md

@@ -50,14 +50,15 @@ An open source menu for N64 flashcarts.
 These features are subject to change:
 
 ### ROM Boxart
-To use boxart, place PNG files in the `/menu/boxart` folder on the SD card with the following dimensions:
+To use boxart, place PNG files within the `sd:/menu/boxart/` folder.
+
+They must use the following dimensions:
 * Standard covers: 158x112
 * 64DD covers: 129x112
 * Japanese covers: 112x158
- 
-Each file must be named according to the 2 letter ROM ID, or 3 letter ROM ID including media type.
+
+Each file must be named according to the 2 letter ROM ID.
 i.e. for GoldenEye 2 letters, this would be `GE.png`.
-i.e. for GoldenEye 3 letters, this would be `NGE.png`.
 You can download these boxart packs:
 
 [American Boxart](https://mega.nz/file/6cNGwSqI#8X5ukb65n3YMlGaUtSOGXkKo9HxVnnMOgqn94Epcr7w)
@@ -66,6 +67,10 @@ You can download these boxart packs:
 
 [64DD Boxart](https://mega.nz/file/O3JzwD7B#BYl1aV-pbrJ-MxWUbM_K0yGVIRbmSoxJJZqQInRzZyM)
 
+To improve the loading of the boxart images, and/or to ensure correct boxart images, these can be loaded by directories by each character of the full 4 character Game Code.
+i.e. for GoldenEye NTSC USA (NGEE), this would be `sd:/menu/boxart/N/G/E/E/front.png`.
+i.e. for GoldenEye PAL (NGEP), this would be `sd:/menu/boxart/N/G/E/P/front.png`.
+
 
 ### Menu Settings
 The Menu creates a `config.ini` file in `sd:/menu/` which contains various settings that are used by the menu.

src/menu/components/boxart.c

@@ -69,26 +69,14 @@ component_boxart_t *component_boxart_init (const char *storage_prefix, char *gam
         path_pop(path);
         path_pop(path);
 
-        sprintf(file_name, "%c%c%c.png", game_code[0], game_code[1], game_code[2]);
+        sprintf(file_name, "%c%c.png", game_code[1], game_code[2]);
         path_push(path, file_name);
-        if (file_exists(path_get(path))) {      
+        if (file_exists(path_get(path))) {
             if (png_decoder_start(path_get(path), BOXART_WIDTH, BOXART_HEIGHT, png_decoder_callback, b) == PNG_OK) {
                 path_free(path);
                 return b;
             }
         }
-        else {
-            path_pop(path);
-
-            sprintf(file_name, "%c%c.png", game_code[1], game_code[2]);
-            path_push(path, file_name);
-            if (file_exists(path_get(path))) {
-                if (png_decoder_start(path_get(path), BOXART_WIDTH, BOXART_HEIGHT, png_decoder_callback, b) == PNG_OK) {
-                    path_free(path);
-                    return b;
-                }
-            }
-        }
     }
     // TODO: return default image.