From f4fe943b9bb9e3f5a7f4590d217e2c8e878dcf2d Mon Sep 17 00:00:00 2001
From: Zack Buhman <zack@buhman.org>
Date: Mon, 1 Sep 2025 18:16:49 -0500
Subject: [PATCH] add support for 1x1 characters

---
 aseprite.py | 72 ++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 57 insertions(+), 15 deletions(-)

diff --git a/aseprite.py b/aseprite.py
index 9fdae94..21280e8 100644
--- a/aseprite.py
+++ b/aseprite.py
@@ -549,33 +549,65 @@ def pack_character_2x2(tileset_chunk, offset):
 
     return bytes(buf)
 
-def pack_character_patterns_2x2(filename, tileset_chunk):
+def pack_character_1x1(tileset_chunk, offset):
+    assert tileset_chunk.tile_width == 8
+    assert tileset_chunk.tile_height == 8
+    assert type(tileset_chunk.data) == TilesetChunkInternal
+
+    buf = bytearray(8 * 8)
+
+    for y in range(8):
+        for x in range(8):
+            tileset_x = x
+            tileset_y = y
+            px = tileset_chunk.data.pixel[offset + tileset_y * 8 + tileset_x]
+            buf[y * 8 + x] = px
+
+    return bytes(buf)
+
+def pack_character_patterns(filename, tileset_chunk):
     with open(filename, "wb") as f:
         for i in range(tileset_chunk.number_of_tiles):
             offset = tileset_chunk.tile_width * tileset_chunk.tile_height * i
-            buf = pack_character_2x2(tileset_chunk, offset)
+
+            if tileset_chunk.tile_width == 8 and tileset_chunk.tile_height == 8:
+                buf = pack_character_1x1(tileset_chunk, offset)
+            elif tileset_chunk.tile_width == 16 and tileset_chunk.tile_height == 16:
+                buf = pack_character_2x2(tileset_chunk, offset)
+            else:
+                assert False, (tileset_chunk.tile_width, tileset_chunk.tile_height)
+
             f.write(buf)
 
         print(filename, f.tell(), file=sys.stderr)
 
-def pack_pattern_name_table_2x2(filename, cel_chunk):
+def pack_pattern_name_table(filename, cel_chunk, x_cells, y_cells):
     with open(filename, "wb") as f:
         assert type(cel_chunk.data) == CelChunk_CompressedTilemap
-        assert cel_chunk.data.width_in_number_of_tiles <= 64
-        assert cel_chunk.data.height_in_number_of_tiles <= 64
+        #assert cel_chunk.data.width_in_number_of_tiles <= 64
+        #assert cel_chunk.data.height_in_number_of_tiles <= 64
 
         tile_width = cel_chunk.data.width_in_number_of_tiles
         tile_height = cel_chunk.data.height_in_number_of_tiles
 
-        h_pages = ((tile_width + 31) & (~31)) // 32
-        v_pages = ((tile_height + 31) & (~31)) // 32
+        print(tile_width, tile_height)
+
+        h_pages = ((tile_width + (x_cells - 1)) & (~(x_cells - 1))) // x_cells
+        v_pages = ((tile_height + (y_cells - 1)) & (~(y_cells - 1))) // y_cells
+
+        if h_pages > 2:
+            h_pages = 2
+        if v_pages > 2:
+            v_pages = 2
+
+        print("h_pages, v_pages", h_pages, v_pages)
 
         for v_page in range(v_pages):
             for h_page in range(h_pages):
-                for y in range(32):
-                    for x in range(32):
-                        tx = (h_page * 32) + x
-                        ty = (v_page * 32) + y
+                for y in range(y_cells):
+                    for x in range(x_cells):
+                        tx = (h_page * x_cells) + x
+                        ty = (v_page * y_cells) + y
                         if tx >= tile_width or ty >= tile_height:
                             f.write(pack_index(0))
                         else:
@@ -635,6 +667,9 @@ for _ in range(frame_header.number_of_chunks):
     elif chunk.chunk_type == 0x2020:
         # user data
         pass
+    elif chunk.chunk_type == 0x2007:
+        # color profile
+        pass
     else:
         print("unhandled chunk: ")
         pprinti(chunk, 1)
@@ -645,11 +680,18 @@ pack_palette(palette)
 
 for tileset_index, tileset_chunk in sorted(tilesets.items(), key=itemgetter(0)):
     filename = f"character_pattern__tileset_{tileset_index}.bin"
-    pack_character_patterns_2x2(filename, tileset_chunk)
+    pack_character_patterns(filename, tileset_chunk)
 
 for layer_index, cel_chunk in sorted(cel_chunks.items(), key=itemgetter(0)):
     filename = f"pattern_name_table__layer_{layer_index}.bin"
-    pack_pattern_name_table_2x2(filename, cel_chunk)
+    #layers[layer_index]
+    print(f"layer={layer_index} layer_name={layers[layer_index].layer_name} tileset={layers[layer_index].tileset_index}");
+    tileset_chunk = tilesets[layers[layer_index].tileset_index]
 
-for layer_index, layer_chunk in enumerate(layers):
-    print(f"layer={layer_index} tileset={layer_chunk.tileset_index}");
+    x_cells = 64 // (tileset_chunk.tile_width // 8)
+    y_cells = 64 // (tileset_chunk.tile_height // 8)
+
+    pack_pattern_name_table(filename, cel_chunk, x_cells, y_cells)
+
+#for layer_index, layer_chunk in enumerate(layers):
+#    print(f"layer={layer_index} layer_name={layer_chunk.layer_name} tileset={layer_chunk.tileset_index}");