background: move background-packing to new file

.gitignore

@@ -0,0 +1,2 @@
+*.pyc
+__pycache__

aseprite.py

@@ -1,11 +1,8 @@
 import struct
 import sys
 from dataclasses import dataclass
-from pprint import pprint, pformat
-import textwrap
 from typing import Union, Optional
 import zlib
-from operator import itemgetter
 
 class CustomInt:
     value: int
@@ -486,157 +483,21 @@ def parse_cel_chunk(mem):
 
     return cel_chunk, mem
 
-with open(sys.argv[1], 'rb') as f:
-    buf = f.read()
-    mem = memoryview(buf)
 
-def pprinti(o, i):
+def parse_file(mem):
-    s = pformat(o)
+    header, mem = parse_header(mem)
-    print(textwrap.indent(s, '    ' * i))
+    #pprint(header)
+    assert header.color_depth == 8, header.color_depth
 
-def pack_bgr555(red, green, blue):
+    frame_header, mem = parse_frame_header(mem)
-    bgr = (
+    #pprint(frame_header)
-        ((red >> 3) << 0) |
-        ((green >> 3) << 5) |
-        ((blue >> 3) << 10)
-    )
-    return struct.pack(">H", bgr)
 
-def pack_index(i):
+    tilesets = dict() # by tileset id
-    return struct.pack(">I", i)
+    layers = []
+    palette = None
+    cel_chunks = dict() # by layer index
 
-def pack_old_palette_chunk(old_palette_chunk):
+    for _ in range(frame_header.number_of_chunks):
-    with open("palette.bin", "wb") as f:
-        for color in old_palette_chunk.packets[0].colors:
-            f.write(pack_bgr555(*color))
-
-def pack_palette_chunk(palette_chunk):
-    with open("palette.bin", "wb") as f:
-        assert palette_chunk.first_color_index_to_change == 0
-
-        for entry in palette_chunk.entries:
-            color = (entry.red, entry.green, entry.blue)
-            f.write(pack_bgr555(*color))
-
-        print("palette.bin", f.tell(), file=sys.stderr)
-
-def pack_palette(palette):
-    if type(palette) is PaletteChunk:
-        pack_palette_chunk(palette)
-    elif type(palette) is OldPaletteChunk:
-        pack_old_palette_chunk(palette)
-    else:
-        assert False, type(palette)
-
-def pack_character_2x2(tileset_chunk, offset):
-    #tileset_chunk.number_of_tiles,
-    #tileset_chunk.tile_width,
-    #tileset_chunk.tile_height,
-
-    assert tileset_chunk.tile_width == 16
-    assert tileset_chunk.tile_height == 16
-    assert type(tileset_chunk.data) == TilesetChunkInternal
-
-    buf = bytearray(16 * 16)
-
-    for cell_ix in range(4):
-        for y in range(8):
-            for x in range(8):
-                tileset_x = 8 * (cell_ix % 2) + x
-                tileset_y = 8 * (cell_ix // 2) + y
-                px = tileset_chunk.data.pixel[offset + tileset_y * 16 + tileset_x]
-                buf[cell_ix * 8 * 8 + y * 8 + x] = px
-
-    return bytes(buf)
-
-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
-
-            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(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
-
-        tile_width = cel_chunk.data.width_in_number_of_tiles
-        tile_height = cel_chunk.data.height_in_number_of_tiles
-
-        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(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:
-                            cel_chunk_ix = ty * tile_width + tx
-                            tile_data = cel_chunk.data.tile[cel_chunk_ix]
-
-                            tile_id = tile_data & cel_chunk.data.bitmask_for_tile_id.value
-                            x_flip = (tile_data & cel_chunk.data.bitmask_for_x_flip.value) != 0
-                            y_flip = (tile_data & cel_chunk.data.bitmask_for_y_flip.value) != 0
-
-                            pattern = (int(y_flip) << 31) | (int(x_flip) << 30) | tile_id
-
-                            f.write(pack_index(pattern))
-
-        print(filename, f.tell(), file=sys.stderr)
-
-header, mem = parse_header(mem)
-#pprint(header)
-assert header.color_depth == 8, header.color_depth
-
-frame_header, mem = parse_frame_header(mem)
-#pprint(frame_header)
-
-tilesets = dict() # by tileset id
-layers = []
-palette = None
-cel_chunks = dict() # by layer index
-
-for _ in range(frame_header.number_of_chunks):
         chunk, mem = parse_chunk(mem)
         #pprinti(chunk, 1)
         if chunk.chunk_type == 0x4:
@@ -674,24 +535,6 @@ for _ in range(frame_header.number_of_chunks):
             print("unhandled chunk: ")
             pprinti(chunk, 1)
 
-assert palette is not None
+    assert palette is not None
 
-pack_palette(palette)
+    return tilesets, layers, palette, cel_chunks
-
-for tileset_index, tileset_chunk in sorted(tilesets.items(), key=itemgetter(0)):
-    filename = f"character_pattern__tileset_{tileset_index}.bin"
-    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"
-    #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]
-
-    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}");

background.py

@@ -0,0 +1,168 @@
+import sys
+from pprint import pprint, pformat
+import textwrap
+import struct
+from operator import itemgetter
+
+from aseprite import parse_file
+from aseprite import PaletteChunk, OldPaletteChunk, TilesetChunkInternal, CelChunk_CompressedTilemap
+
+def pprinti(o, i):
+    s = pformat(o)
+    print(textwrap.indent(s, '    ' * i))
+
+def pack_bgr555(red, green, blue):
+    bgr = (
+        ((red >> 3) << 0) |
+        ((green >> 3) << 5) |
+        ((blue >> 3) << 10)
+    )
+    return struct.pack(">H", bgr)
+
+def pack_index(i):
+    return struct.pack(">I", i)
+
+def pack_old_palette_chunk(old_palette_chunk):
+    with open("palette.bin", "wb") as f:
+        for color in old_palette_chunk.packets[0].colors:
+            f.write(pack_bgr555(*color))
+
+def pack_palette_chunk(palette_chunk):
+    with open("palette.bin", "wb") as f:
+        assert palette_chunk.first_color_index_to_change == 0
+
+        for entry in palette_chunk.entries:
+            color = (entry.red, entry.green, entry.blue)
+            f.write(pack_bgr555(*color))
+
+        print("palette.bin", f.tell(), file=sys.stderr)
+
+def pack_palette(palette):
+    if type(palette) is PaletteChunk:
+        pack_palette_chunk(palette)
+    elif type(palette) is OldPaletteChunk:
+        pack_old_palette_chunk(palette)
+    else:
+        assert False, type(palette)
+
+def pack_character_2x2(tileset_chunk, offset):
+    #tileset_chunk.number_of_tiles,
+    #tileset_chunk.tile_width,
+    #tileset_chunk.tile_height,
+
+    assert tileset_chunk.tile_width == 16
+    assert tileset_chunk.tile_height == 16
+    assert type(tileset_chunk.data) == TilesetChunkInternal
+
+    buf = bytearray(16 * 16)
+
+    for cell_ix in range(4):
+        for y in range(8):
+            for x in range(8):
+                tileset_x = 8 * (cell_ix % 2) + x
+                tileset_y = 8 * (cell_ix // 2) + y
+                px = tileset_chunk.data.pixel[offset + tileset_y * 16 + tileset_x]
+                buf[cell_ix * 8 * 8 + y * 8 + x] = px
+
+    return bytes(buf)
+
+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
+
+            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(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
+
+        tile_width = cel_chunk.data.width_in_number_of_tiles
+        tile_height = cel_chunk.data.height_in_number_of_tiles
+
+        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(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:
+                            cel_chunk_ix = ty * tile_width + tx
+                            tile_data = cel_chunk.data.tile[cel_chunk_ix]
+
+                            tile_id = tile_data & cel_chunk.data.bitmask_for_tile_id.value
+                            x_flip = (tile_data & cel_chunk.data.bitmask_for_x_flip.value) != 0
+                            y_flip = (tile_data & cel_chunk.data.bitmask_for_y_flip.value) != 0
+
+                            pattern = (int(y_flip) << 31) | (int(x_flip) << 30) | tile_id
+
+                            f.write(pack_index(pattern))
+
+        print(filename, f.tell(), file=sys.stderr)
+
+with open(sys.argv[1], 'rb') as f:
+    buf = f.read()
+    mem = memoryview(buf)
+
+tilesets, layers, palette, cel_chunks = parse_file(buf)
+
+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(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"
+    #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]
+
+    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}");