Add a script to convert project-specific graphics.

This is an alternative to terrible hacks like filename metadata, and might combat submodule bloat.

Makefile

@@ -7,7 +7,7 @@ MD5 := md5sum -c --quiet
 .SECONDEXPANSION:
 
 poketools := extras/pokemontools
-gfx       := $(PYTHON) $(poketools)/gfx.py
+gfx       := $(PYTHON) gfx.py
 includes  := $(PYTHON) $(poketools)/scan_includes.py
 
 
@@ -79,12 +79,13 @@ pngs:
 	find . -iname "*.[12]bpp" -exec touch {} +
 	find . -iname "*.lz"      -exec touch {} +
 
-%.2bpp: %.png ; @$(gfx) 2bpp $<
-%.1bpp: %.png ; @$(gfx) 1bpp $<
-%.lz:   %     ; @$(gfx) lz $<
+%.2bpp: %.png ; $(gfx) 2bpp $<
+%.1bpp: %.png ; $(gfx) 1bpp $<
+%.lz:   %     ; $(gfx) lz $<
 
 
-%.pal: ;
+%.pal: %.2bpp ;
+gfx/pics/%/normal.pal gfx/pics/%/bitmask.asm gfx/pics/%/frames.asm: gfx/pics/%/front.2bpp ;
 %.bin: ;
 %.blk: ;
 %.tilemap: ;

extras

@@ -1 +1 @@
-Subproject commit 46492bd9075313a52622cc585fe7b2ca404cbdcd
+Subproject commit bf76a6b84a2f57edbcd01d6b2841cb813b2afce4

gfx.py

@@ -0,0 +1,101 @@
+"""Supplementary scripts for graphics conversion."""
+
+import os
+import argparse
+
+from extras.pokemontools import gfx
+
+
+# Graphics with inverted tilemaps that aren't covered by filepath_rules.
+pics = [
+	'gfx/shrink1',
+	'gfx/shrink2',
+]
+
+def filepath_rules(filepath):
+	"""Infer attributes of certain graphics by their location in the filesystem."""
+	args = {}
+
+	filedir, filename = os.path.split(filepath)
+	name, _, ext = filename.partition('.') # os.path.splitext only takes the last '.'
+
+	if 'gfx/pics/' in filedir:
+		if name == 'front':
+			args['pal_file'] = os.path.join(filedir, 'normal.pal')
+			args['pic'] = True
+			args['animate'] = True
+		elif name == 'back':
+			args['pal_file'] = os.path.join(filedir, 'shiny.pal')
+			args['pic'] = True
+
+	elif 'gfx/trainers' in filedir:
+		args['pic'] = True
+
+	elif os.path.join(filedir, name) in pics:
+		args['pic'] = True
+
+	if args.get('pal_file'):
+		args['palout'] = args['pal_file']
+
+	if args.get('pic'):
+		if ext == 'png':
+			w, h = gfx.png.Reader(filepath).asRGBA8()[:2]
+			w = min(w/8, h/8)
+			args['pic_dimensions'] = w, w
+	return args
+
+
+def to_1bpp(filename, **kwargs):
+	filename, name, ext = gfx.try_decompress(filename)
+	if   ext == '.1bpp': pass
+	elif ext == '.2bpp': gfx.export_2bpp_to_1bpp(filename, **kwargs)
+	elif ext == '.png':  gfx.export_png_to_1bpp(filename, **kwargs)
+
+def to_2bpp(filename, **kwargs):
+	filename, name, ext = gfx.try_decompress(filename)
+	if   ext == '.1bpp': gfx.export_1bpp_to_2bpp(filename, **kwargs)
+	elif ext == '.2bpp': pass
+	elif ext == '.png':  gfx.export_png_to_2bpp(filename, **kwargs)
+
+def to_png(filename, **kwargs):
+	filename, name, ext = gfx.try_decompress(filename)
+	if   ext == '.1bpp': gfx.export_1bpp_to_png(filename, **kwargs)
+	elif ext == '.2bpp': gfx.export_2bpp_to_png(filename, **kwargs)
+	elif ext == '.png':  pass
+
+def compress(filename, **kwargs):
+	data = open(filename, 'rb').read()
+	lz_data = gfx.Compressed(data).output
+	open(filename + '.lz', 'wb').write(bytearray(lz_data))
+
+def decompress(filename, **kwargs):
+	lz_data = open(filename, 'rb').read()
+	data = gfx.Decompressed(lz_data).output
+	name, ext = os.path.splitext(filename)
+	open(name, 'wb').write(bytearray(data))
+
+
+methods = {
+	'2bpp': to_2bpp,
+	'1bpp': to_1bpp,
+	'png':  to_png,
+	'lz':   compress,
+	'unlz': decompress,
+}
+
+def main(method_name, filenames=None):
+	if filenames is None: filenames = []
+	for filename in filenames:
+		args = filepath_rules(filename)
+		method = methods.get(method_name)
+		if method: method(filename, **args)
+
+def get_args():
+	ap = argparse.ArgumentParser()
+	ap.add_argument('method_name')
+	ap.add_argument('filenames', nargs='*')
+	args = ap.parse_args()
+	return args
+
+if __name__ == '__main__':
+	main(**get_args().__dict__)