ref: eafeb932d96aa7d2cb5010ea8b6fb929d62b9a88
dir: /tools/pokemontools/gfx.py/
# -*- coding: utf-8 -*-
import os
import sys
import png
from math import sqrt, floor, ceil
import argparse
import operator
from lz import Compressed, Decompressed
def split(list_, interval):
"""
Split a list by length.
"""
for i in xrange(0, len(list_), interval):
j = min(i + interval, len(list_))
yield list_[i:j]
def hex_dump(data, length=0x10):
"""
just use hexdump -C
"""
margin = len('%x' % len(data))
output = []
address = 0
for line in split(data, length):
output += [
hex(address)[2:].zfill(margin) +
' | ' +
' '.join('%.2x' % byte for byte in line)
]
address += length
return '\n'.join(output)
def get_tiles(image):
"""
Split a 2bpp image into 8x8 tiles.
"""
return list(split(image, 0x10))
def connect(tiles):
"""
Combine 8x8 tiles into a 2bpp image.
"""
return [byte for tile in tiles for byte in tile]
def transpose(tiles, width=None):
"""
Transpose a tile arrangement along line y=-x.
00 01 02 03 04 05 00 06 0c 12 18 1e
06 07 08 09 0a 0b 01 07 0d 13 19 1f
0c 0d 0e 0f 10 11 <-> 02 08 0e 14 1a 20
12 13 14 15 16 17 03 09 0f 15 1b 21
18 19 1a 1b 1c 1d 04 0a 10 16 1c 22
1e 1f 20 21 22 23 05 0b 11 17 1d 23
00 01 02 03 00 04 08
04 05 06 07 <-> 01 05 09
08 09 0a 0b 02 06 0a
03 07 0b
"""
if width == None:
width = int(sqrt(len(tiles))) # assume square image
tiles = sorted(enumerate(tiles), key= lambda (i, tile): i % width)
return [tile for i, tile in tiles]
def transpose_tiles(image, width=None):
return connect(transpose(get_tiles(image), width))
def interleave(tiles, width):
"""
00 01 02 03 04 05 00 02 04 06 08 0a
06 07 08 09 0a 0b 01 03 05 07 09 0b
0c 0d 0e 0f 10 11 --> 0c 0e 10 12 14 16
12 13 14 15 16 17 0d 0f 11 13 15 17
18 19 1a 1b 1c 1d 18 1a 1c 1e 20 22
1e 1f 20 21 22 23 19 1b 1d 1f 21 23
"""
interleaved = []
left, right = split(tiles[::2], width), split(tiles[1::2], width)
for l, r in zip(left, right):
interleaved += l + r
return interleaved
def deinterleave(tiles, width):
"""
00 02 04 06 08 0a 00 01 02 03 04 05
01 03 05 07 09 0b 06 07 08 09 0a 0b
0c 0e 10 12 14 16 --> 0c 0d 0e 0f 10 11
0d 0f 11 13 15 17 12 13 14 15 16 17
18 1a 1c 1e 20 22 18 19 1a 1b 1c 1d
19 1b 1d 1f 21 23 1e 1f 20 21 22 23
"""
deinterleaved = []
rows = list(split(tiles, width))
for left, right in zip(rows[::2], rows[1::2]):
for l, r in zip(left, right):
deinterleaved += [l, r]
return deinterleaved
def interleave_tiles(image, width):
return connect(interleave(get_tiles(image), width))
def deinterleave_tiles(image, width):
return connect(deinterleave(get_tiles(image), width))
def condense_image_to_map(image, pic=0):
"""
Reduce an image of adjacent frames to an image containing a base frame and any unrepeated tiles.
Returns the new image and the corresponding tilemap used to reconstruct the input image.
If <pic> is 0, ignore the concept of frames. This behavior might be better off as another function.
"""
tiles = get_tiles(image)
new_tiles, tilemap = condense_tiles_to_map(tiles, pic)
new_image = connect(new_tiles)
return new_image, tilemap
def condense_tiles_to_map(tiles, pic=0):
"""
Reduce a sequence of tiles representing adjacent frames to a base frame and any unrepeated tiles.
Returns the new tiles and the corresponding tilemap used to reconstruct the input tile sequence.
If <pic> is 0, ignore the concept of frames. This behavior might be better off as another function.
"""
# Leave the first frame intact for pics.
new_tiles = tiles[:pic]
tilemap = range(pic)
for i, tile in enumerate(tiles[pic:]):
if tile not in new_tiles:
new_tiles.append(tile)
if pic:
# Match the first frame exactly where possible.
# This reduces the space needed to replace tiles in pic animations.
# For example, if a tile is repeated twice in the first frame,
# but at the same relative index as the second tile, use the second index.
# When creating a bitmask later, the second index would not require a replacement, but the first index would have.
pic_i = i % pic
if tile == new_tiles[pic_i]:
tilemap.append(pic_i)
else:
tilemap.append(new_tiles.index(tile))
else:
tilemap.append(new_tiles.index(tile))
return new_tiles, tilemap
def test_condense_tiles_to_map():
test = condense_tiles_to_map(list('abcadbae'))
if test != (list('abcde'), [0, 1, 2, 0, 3, 1, 0, 4]):
raise Exception(test)
test = condense_tiles_to_map(list('abcadbae'), 2)
if test != (list('abcde'), [0, 1, 2, 0, 3, 1, 0, 4]):
raise Exception(test)
test = condense_tiles_to_map(list('abcadbae'), 4)
if test != (list('abcade'), [0, 1, 2, 3, 4, 1, 0, 5]):
raise Exception(test)
test = condense_tiles_to_map(list('abcadbea'), 4)
if test != (list('abcade'), [0, 1, 2, 3, 4, 1, 5, 3]):
raise Exception(test)
def to_file(filename, data):
"""
Apparently open(filename, 'wb').write(bytearray(data)) won't work.
"""
file = open(filename, 'wb')
for byte in data:
file.write('%c' % byte)
file.close()
def decompress_file(filein, fileout=None):
image = bytearray(open(filein).read())
de = Decompressed(image)
if fileout == None:
fileout = os.path.splitext(filein)[0]
to_file(fileout, de.output)
def compress_file(filein, fileout=None):
image = bytearray(open(filein).read())
lz = Compressed(image)
if fileout == None:
fileout = filein + '.lz'
to_file(fileout, lz.output)
def bin_to_rgb(word):
red = word & 0b11111
word >>= 5
green = word & 0b11111
word >>= 5
blue = word & 0b11111
return (red, green, blue)
def convert_binary_pal_to_text_by_filename(filename):
pal = bytearray(open(filename).read())
return convert_binary_pal_to_text(pal)
def convert_binary_pal_to_text(pal):
output = ''
words = [hi * 0x100 + lo for lo, hi in zip(pal[::2], pal[1::2])]
for word in words:
red, green, blue = ['%.2d' % c for c in bin_to_rgb(word)]
output += '\tRGB ' + ', '.join((red, green, blue))
output += '\n'
return output
def read_rgb_macros(lines):
colors = []
for line in lines:
macro = line.split(" ")[0].strip()
if macro == 'RGB':
params = ' '.join(line.split(" ")[1:]).split(',')
red, green, blue = [int(v) for v in params]
colors += [[red, green, blue]]
return colors
def rewrite_binary_pals_to_text(filenames):
for filename in filenames:
pal_text = convert_binary_pal_to_text_by_filename(filename)
with open(filename, 'w') as out:
out.write(pal_text)
def flatten(planar):
"""
Flatten planar 2bpp image data into a quaternary pixel map.
"""
strips = []
for bottom, top in split(planar, 2):
bottom = bottom
top = top
strip = []
for i in xrange(7,-1,-1):
color = (
(bottom >> i & 1) +
(top *2 >> i & 2)
)
strip += [color]
strips += strip
return strips
def to_lines(image, width):
"""
Convert a tiled quaternary pixel map to lines of quaternary pixels.
"""
tile_width = 8
tile_height = 8
num_columns = width / tile_width
height = len(image) / width
lines = []
for cur_line in xrange(height):
tile_row = cur_line / tile_height
line = []
for column in xrange(num_columns):
anchor = (
num_columns * tile_row * tile_width * tile_height +
column * tile_width * tile_height +
cur_line % tile_height * tile_width
)
line += image[anchor : anchor + tile_width]
lines += [line]
return lines
def dmg2rgb(word):
"""
For PNGs.
"""
def shift(value):
while True:
yield value & (2**5 - 1)
value >>= 5
word = shift(word)
# distribution is less even w/ << 3
red, green, blue = [int(color * 8.25) for color in [word.next() for _ in xrange(3)]]
alpha = 255
return (red, green, blue, alpha)
def rgb_to_dmg(color):
"""
For PNGs.
"""
word = (color['r'] / 8)
word += (color['g'] / 8) << 5
word += (color['b'] / 8) << 10
return word
def pal_to_png(filename):
"""
Interpret a .pal file as a png palette.
"""
with open(filename) as rgbs:
colors = read_rgb_macros(rgbs.readlines())
a = 255
palette = []
for color in colors:
# even distribution over 000-255
r, g, b = [int(hue * 8.25) for hue in color]
palette += [(r, g, b, a)]
white = (255,255,255,255)
black = (000,000,000,255)
if white not in palette and len(palette) < 4:
palette = [white] + palette
if black not in palette and len(palette) < 4:
palette = palette + [black]
return palette
def png_to_rgb(palette):
"""
Convert a png palette to rgb macros.
"""
output = ''
for color in palette:
r, g, b = [color[c] / 8 for c in 'rgb']
output += '\tRGB ' + ', '.join(['%.2d' % hue for hue in (r, g, b)])
output += '\n'
return output
def read_filename_arguments(filename):
"""
Infer graphics conversion arguments given a filename.
Arguments are separated with '.'.
"""
parsed_arguments = {}
int_arguments = {
'w': 'width',
'h': 'height',
't': 'tile_padding',
}
arguments = os.path.splitext(filename)[0].lstrip('.').split('.')[1:]
for argument in arguments:
# Check for integer arguments first (i.e. "w128").
arg = argument[0]
param = argument[1:]
if param.isdigit():
arg = int_arguments.get(arg, False)
if arg:
parsed_arguments[arg] = int(param)
elif argument == 'arrange':
parsed_arguments['norepeat'] = True
parsed_arguments['tilemap'] = True
# Pic dimensions (i.e. "6x6").
elif 'x' in argument and any(map(str.isdigit, argument)):
w, h = argument.split('x')
if w.isdigit() and h.isdigit():
parsed_arguments['pic_dimensions'] = (int(w), int(h))
else:
parsed_arguments[argument] = True
return parsed_arguments
def export_2bpp_to_png(filein, fileout=None, pal_file=None, height=0, width=0, tile_padding=0, pic_dimensions=None, **kwargs):
if fileout == None:
fileout = os.path.splitext(filein)[0] + '.png'
image = open(filein, 'rb').read()
arguments = {
'width': width,
'height': height,
'pal_file': pal_file,
'tile_padding': tile_padding,
'pic_dimensions': pic_dimensions,
}
arguments.update(read_filename_arguments(filein))
if pal_file == None:
if os.path.exists(os.path.splitext(fileout)[0]+'.pal'):
arguments['pal_file'] = os.path.splitext(fileout)[0]+'.pal'
result = convert_2bpp_to_png(image, **arguments)
width, height, palette, greyscale, bitdepth, px_map = result
w = png.Writer(
width,
height,
palette=palette,
compression=9,
greyscale=greyscale,
bitdepth=bitdepth
)
with open(fileout, 'wb') as f:
w.write(f, px_map)
def convert_2bpp_to_png(image, **kwargs):
"""
Convert a planar 2bpp graphic to png.
"""
image = bytearray(image)
pad_color = bytearray([0])
width = kwargs.get('width', 0)
height = kwargs.get('height', 0)
tile_padding = kwargs.get('tile_padding', 0)
pic_dimensions = kwargs.get('pic_dimensions', None)
pal_file = kwargs.get('pal_file', None)
interleave = kwargs.get('interleave', False)
# Width must be specified to interleave.
if interleave and width:
image = interleave_tiles(image, width / 8)
# Pad the image by a given number of tiles if asked.
image += pad_color * 0x10 * tile_padding
# Some images are transposed in blocks.
if pic_dimensions:
w, h = pic_dimensions
if not width: width = w * 8
pic_length = w * h * 0x10
trailing = len(image) % pic_length
pic = []
for i in xrange(0, len(image) - trailing, pic_length):
pic += transpose_tiles(image[i:i+pic_length], h)
image = bytearray(pic) + image[len(image) - trailing:]
# Pad out trailing lines.
image += pad_color * 0x10 * ((w - (len(image) / 0x10) % h) % w)
def px_length(img):
return len(img) * 4
def tile_length(img):
return len(img) * 4 / (8*8)
if width and height:
tile_width = width / 8
more_tile_padding = (tile_width - (tile_length(image) % tile_width or tile_width))
image += pad_color * 0x10 * more_tile_padding
elif width and not height:
tile_width = width / 8
more_tile_padding = (tile_width - (tile_length(image) % tile_width or tile_width))
image += pad_color * 0x10 * more_tile_padding
height = px_length(image) / width
elif height and not width:
tile_height = height / 8
more_tile_padding = (tile_height - (tile_length(image) % tile_height or tile_height))
image += pad_color * 0x10 * more_tile_padding
width = px_length(image) / height
# at least one dimension should be given
if width * height != px_length(image):
# look for possible combos of width/height that would form a rectangle
matches = []
# Height need not be divisible by 8, but width must.
# See pokered gfx/minimize_pic.1bpp.
for w in range(8, px_length(image) / 2 + 1, 8):
h = px_length(image) / w
if w * h == px_length(image):
matches += [(w, h)]
# go for the most square image
if len(matches):
width, height = sorted(matches, key= lambda (w, h): (h % 8 != 0, w + h))[0] # favor height
else:
raise Exception, 'Image can\'t be divided into tiles (%d px)!' % (px_length(image))
# convert tiles to lines
lines = to_lines(flatten(image), width)
if pal_file == None:
palette = None
greyscale = True
bitdepth = 2
px_map = [[3 - pixel for pixel in line] for line in lines]
else: # gbc color
palette = pal_to_png(pal_file)
greyscale = False
bitdepth = 8
px_map = [[pixel for pixel in line] for line in lines]
return width, height, palette, greyscale, bitdepth, px_map
def get_pic_animation(tmap, w, h):
"""
Generate pic animation data from a combined tilemap of each frame.
"""
frame_text = ''
bitmask_text = ''
frames = list(split(tmap, w * h))
base = frames.pop(0)
bitmasks = []
for i in xrange(len(frames)):
frame_text += '\tdw .frame{}\n'.format(i + 1)
for i, frame in enumerate(frames):
bitmask = map(operator.ne, frame, base)
if bitmask not in bitmasks:
bitmasks.append(bitmask)
which_bitmask = bitmasks.index(bitmask)
mask = iter(bitmask)
masked_frame = filter(lambda _: mask.next(), frame)
frame_text += '.frame{}\n'.format(i + 1)
frame_text += '\tdb ${:02x} ; bitmask\n'.format(which_bitmask)
if masked_frame:
frame_text += '\tdb {}\n'.format(', '.join(
map('${:02x}'.format, masked_frame)
))
for i, bitmask in enumerate(bitmasks):
bitmask_text += '; {}\n'.format(i)
for byte in split(bitmask, 8):
byte = int(''.join(map(int.__repr__, reversed(byte))), 2)
bitmask_text += '\tdb %{:08b}\n'.format(byte)
return frame_text, bitmask_text
def export_png_to_2bpp(filein, fileout=None, palout=None, **kwargs):
arguments = {
'tile_padding': 0,
'pic_dimensions': None,
'animate': False,
'stupid_bitmask_hack': [],
}
arguments.update(kwargs)
arguments.update(read_filename_arguments(filein))
image, arguments = png_to_2bpp(filein, **arguments)
if fileout == None:
fileout = os.path.splitext(filein)[0] + '.2bpp'
to_file(fileout, image)
tmap = arguments.get('tmap')
if tmap != None and arguments['animate'] and arguments['pic_dimensions']:
# Generate pic animation data.
frame_text, bitmask_text = get_pic_animation(tmap, *arguments['pic_dimensions'])
frames_path = os.path.join(os.path.split(fileout)[0], 'frames.asm')
with open(frames_path, 'w') as out:
out.write(frame_text)
bitmask_path = os.path.join(os.path.split(fileout)[0], 'bitmask.asm')
# The following Pokemon have a bitmask dummied out.
for exception in arguments['stupid_bitmask_hack']:
if exception in bitmask_path:
bitmasks = bitmask_text.split(';')
bitmasks[-1] = bitmasks[-1].replace('1', '0')
bitmask_text = ';'.join(bitmasks)
with open(bitmask_path, 'w') as out:
out.write(bitmask_text)
elif tmap != None and arguments.get('tilemap', False):
tilemap_path = os.path.splitext(fileout)[0] + '.tilemap'
to_file(tilemap_path, tmap)
palette = arguments.get('palette')
if palout == None:
palout = os.path.splitext(fileout)[0] + '.pal'
export_palette(palette, palout)
def get_image_padding(width, height, wstep=8, hstep=8):
padding = {
'left': 0,
'right': 0,
'top': 0,
'bottom': 0,
}
if width % wstep and width >= wstep:
pad = float(width % wstep) / 2
padding['left'] = int(ceil(pad))
padding['right'] = int(floor(pad))
if height % hstep and height >= hstep:
pad = float(height % hstep) / 2
padding['top'] = int(ceil(pad))
padding['bottom'] = int(floor(pad))
return padding
def png_to_2bpp(filein, **kwargs):
"""
Convert a png image to planar 2bpp.
"""
arguments = {
'tile_padding': 0,
'pic_dimensions': False,
'interleave': False,
'norepeat': False,
'tilemap': False,
}
arguments.update(kwargs)
if type(filein) is str:
filein = open(filein)
assert type(filein) is file
width, height, rgba, info = png.Reader(filein).asRGBA8()
# png.Reader returns flat pixel data. Nested is easier to work with
len_px = len('rgba')
image = []
palette = []
for line in rgba:
newline = []
for px in xrange(0, len(line), len_px):
color = dict(zip('rgba', line[px:px+len_px]))
if color not in palette:
if len(palette) < 4:
palette += [color]
else:
# TODO Find the nearest match
print 'WARNING: %s: Color %s truncated to' % (filein, color),
color = sorted(palette, key=lambda x: sum(x.values()))[0]
print color
newline += [color]
image += [newline]
assert len(palette) <= 4, '%s: palette should be 4 colors, is really %d (%s)' % (filein, len(palette), palette)
# Pad out smaller palettes with greyscale colors
greyscale = {
'black': { 'r': 0x00, 'g': 0x00, 'b': 0x00, 'a': 0xff },
'grey': { 'r': 0x55, 'g': 0x55, 'b': 0x55, 'a': 0xff },
'gray': { 'r': 0xaa, 'g': 0xaa, 'b': 0xaa, 'a': 0xff },
'white': { 'r': 0xff, 'g': 0xff, 'b': 0xff, 'a': 0xff },
}
preference = 'white', 'black', 'grey', 'gray'
for hue in map(greyscale.get, preference):
if len(palette) >= 4:
break
if hue not in palette:
palette += [hue]
palette.sort(key=lambda x: sum(x.values()))
# Game Boy palette order
palette.reverse()
# Map pixels to quaternary color ids
padding = get_image_padding(width, height)
width += padding['left'] + padding['right']
height += padding['top'] + padding['bottom']
pad = bytearray([0])
qmap = []
qmap += pad * width * padding['top']
for line in image:
qmap += pad * padding['left']
for color in line:
qmap += [palette.index(color)]
qmap += pad * padding['right']
qmap += pad * width * padding['bottom']
# Graphics are stored in tiles instead of lines
tile_width = 8
tile_height = 8
num_columns = max(width, tile_width) / tile_width
num_rows = max(height, tile_height) / tile_height
image = []
for row in xrange(num_rows):
for column in xrange(num_columns):
# Split it up into strips to convert to planar data
for strip in xrange(min(tile_height, height)):
anchor = (
row * num_columns * tile_width * tile_height +
column * tile_width +
strip * width
)
line = qmap[anchor : anchor + tile_width]
bottom, top = 0, 0
for bit, quad in enumerate(line):
bottom += (quad & 1) << (7 - bit)
top += (quad /2 & 1) << (7 - bit)
image += [bottom, top]
dim = arguments['pic_dimensions']
if dim:
if type(dim) in (tuple, list):
w, h = dim
else:
# infer dimensions based on width.
w = width / tile_width
h = height / tile_height
if h % w == 0:
h = w
tiles = get_tiles(image)
pic_length = w * h
tile_width = width / 8
trailing = len(tiles) % pic_length
new_image = []
for block in xrange(len(tiles) / pic_length):
offset = (h * tile_width) * ((block * w) / tile_width) + ((block * w) % tile_width)
pic = []
for row in xrange(h):
index = offset + (row * tile_width)
pic += tiles[index:index + w]
new_image += transpose(pic, w)
new_image += tiles[len(tiles) - trailing:]
image = connect(new_image)
# Remove any tile padding used to make the png rectangular.
image = image[:len(image) - arguments['tile_padding'] * 0x10]
tmap = None
if arguments['interleave']:
image = deinterleave_tiles(image, num_columns)
if arguments['pic_dimensions']:
image, tmap = condense_image_to_map(image, w * h)
elif arguments['norepeat']:
image, tmap = condense_image_to_map(image)
if not arguments['tilemap']:
tmap = None
arguments.update({ 'palette': palette, 'tmap': tmap, })
return image, arguments
def export_palette(palette, filename):
"""
Export a palette from png to rgb macros in a .pal file.
"""
if os.path.exists(filename):
# Pic palettes are 2 colors (black/white are added later).
with open(filename) as rgbs:
colors = read_rgb_macros(rgbs.readlines())
if len(colors) == 2:
palette = palette[1:3]
text = png_to_rgb(palette)
with open(filename, 'w') as out:
out.write(text)
def png_to_lz(filein):
name = os.path.splitext(filein)[0]
export_png_to_2bpp(filein)
image = open(name+'.2bpp', 'rb').read()
to_file(name+'.2bpp'+'.lz', Compressed(image).output)
def convert_2bpp_to_1bpp(data):
"""
Convert planar 2bpp image data to 1bpp. Assume images are two colors.
"""
return data[::2]
def convert_1bpp_to_2bpp(data):
"""
Convert 1bpp image data to planar 2bpp (black/white).
"""
output = []
for i in data:
output += [i, i]
return output
def export_2bpp_to_1bpp(filename):
name, extension = os.path.splitext(filename)
image = open(filename, 'rb').read()
image = convert_2bpp_to_1bpp(image)
to_file(name + '.1bpp', image)
def export_1bpp_to_2bpp(filename):
name, extension = os.path.splitext(filename)
image = open(filename, 'rb').read()
image = convert_1bpp_to_2bpp(image)
to_file(name + '.2bpp', image)
def export_1bpp_to_png(filename, fileout=None):
if fileout == None:
fileout = os.path.splitext(filename)[0] + '.png'
arguments = read_filename_arguments(filename)
image = open(filename, 'rb').read()
image = convert_1bpp_to_2bpp(image)
result = convert_2bpp_to_png(image, **arguments)
width, height, palette, greyscale, bitdepth, px_map = result
w = png.Writer(width, height, palette=palette, compression=9, greyscale=greyscale, bitdepth=bitdepth)
with open(fileout, 'wb') as f:
w.write(f, px_map)
def export_png_to_1bpp(filename, fileout=None):
if fileout == None:
fileout = os.path.splitext(filename)[0] + '.1bpp'
arguments = read_filename_arguments(filename)
image = png_to_1bpp(filename, **arguments)
to_file(fileout, image)
def png_to_1bpp(filename, **kwargs):
image, kwargs = png_to_2bpp(filename, **kwargs)
return convert_2bpp_to_1bpp(image)
def convert_to_2bpp(filenames=[]):
for filename in filenames:
filename, name, extension = try_decompress(filename)
if extension == '.1bpp':
export_1bpp_to_2bpp(filename)
elif extension == '.2bpp':
pass
elif extension == '.png':
export_png_to_2bpp(filename)
else:
raise Exception, "Don't know how to convert {} to 2bpp!".format(filename)
def convert_to_1bpp(filenames=[]):
for filename in filenames:
filename, name, extension = try_decompress(filename)
if extension == '.1bpp':
pass
elif extension == '.2bpp':
export_2bpp_to_1bpp(filename)
elif extension == '.png':
export_png_to_1bpp(filename)
else:
raise Exception, "Don't know how to convert {} to 1bpp!".format(filename)
def convert_to_png(filenames=[]):
for filename in filenames:
filename, name, extension = try_decompress(filename)
if extension == '.1bpp':
export_1bpp_to_png(filename)
elif extension == '.2bpp':
export_2bpp_to_png(filename)
elif extension == '.png':
pass
else:
raise Exception, "Don't know how to convert {} to png!".format(filename)
def compress(filenames=[]):
for filename in filenames:
data = open(filename, 'rb').read()
lz_data = Compressed(data).output
to_file(filename + '.lz', lz_data)
def decompress(filenames=[]):
for filename in filenames:
name, extension = os.path.splitext(filename)
lz_data = open(filename, 'rb').read()
data = Decompressed(lz_data).output
to_file(name, data)
def try_decompress(filename):
"""
Try to decompress a graphic when determining the filetype.
This skips the manual unlz step when attempting
to convert lz-compressed graphics to png.
"""
name, extension = os.path.splitext(filename)
if extension == '.lz':
decompress([filename])
filename = name
name, extension = os.path.splitext(filename)
return filename, name, extension
def main():
ap = argparse.ArgumentParser()
ap.add_argument('mode')
ap.add_argument('filenames', nargs='*')
args = ap.parse_args()
method = {
'2bpp': convert_to_2bpp,
'1bpp': convert_to_1bpp,
'png': convert_to_png,
'lz': compress,
'unlz': decompress,
}.get(args.mode, None)
if method == None:
raise Exception, "Unknown conversion method!"
method(args.filenames)
if __name__ == "__main__":
main()