mirror of
https://github.com/python-pillow/Pillow.git
synced 2025-11-04 09:57:43 +03:00
367 lines
10 KiB
Python
367 lines
10 KiB
Python
#
|
|
# The Python Imaging Library.
|
|
# $Id$
|
|
#
|
|
# Mac OS X icns file decoder, based on icns.py by Bob Ippolito.
|
|
#
|
|
# history:
|
|
# 2004-10-09 fl Turned into a PIL plugin; removed 2.3 dependencies.
|
|
#
|
|
# Copyright (c) 2004 by Bob Ippolito.
|
|
# Copyright (c) 2004 by Secret Labs.
|
|
# Copyright (c) 2004 by Fredrik Lundh.
|
|
# Copyright (c) 2014 by Alastair Houghton.
|
|
#
|
|
# See the README file for information on usage and redistribution.
|
|
#
|
|
|
|
from PIL import Image, ImageFile, PngImagePlugin, _binary
|
|
import io
|
|
import os
|
|
import shutil
|
|
import struct
|
|
import sys
|
|
import tempfile
|
|
|
|
enable_jpeg2k = hasattr(Image.core, 'jp2klib_version')
|
|
if enable_jpeg2k:
|
|
from PIL import Jpeg2KImagePlugin
|
|
|
|
i8 = _binary.i8
|
|
|
|
HEADERSIZE = 8
|
|
|
|
|
|
def nextheader(fobj):
|
|
return struct.unpack('>4sI', fobj.read(HEADERSIZE))
|
|
|
|
|
|
def read_32t(fobj, start_length, size):
|
|
# The 128x128 icon seems to have an extra header for some reason.
|
|
(start, length) = start_length
|
|
fobj.seek(start)
|
|
sig = fobj.read(4)
|
|
if sig != b'\x00\x00\x00\x00':
|
|
raise SyntaxError('Unknown signature, expecting 0x00000000')
|
|
return read_32(fobj, (start + 4, length - 4), size)
|
|
|
|
|
|
def read_32(fobj, start_length, size):
|
|
"""
|
|
Read a 32bit RGB icon resource. Seems to be either uncompressed or
|
|
an RLE packbits-like scheme.
|
|
"""
|
|
(start, length) = start_length
|
|
fobj.seek(start)
|
|
pixel_size = (size[0] * size[2], size[1] * size[2])
|
|
sizesq = pixel_size[0] * pixel_size[1]
|
|
if length == sizesq * 3:
|
|
# uncompressed ("RGBRGBGB")
|
|
indata = fobj.read(length)
|
|
im = Image.frombuffer("RGB", pixel_size, indata, "raw", "RGB", 0, 1)
|
|
else:
|
|
# decode image
|
|
im = Image.new("RGB", pixel_size, None)
|
|
for band_ix in range(3):
|
|
data = []
|
|
bytesleft = sizesq
|
|
while bytesleft > 0:
|
|
byte = fobj.read(1)
|
|
if not byte:
|
|
break
|
|
byte = i8(byte)
|
|
if byte & 0x80:
|
|
blocksize = byte - 125
|
|
byte = fobj.read(1)
|
|
for i in range(blocksize):
|
|
data.append(byte)
|
|
else:
|
|
blocksize = byte + 1
|
|
data.append(fobj.read(blocksize))
|
|
bytesleft -= blocksize
|
|
if bytesleft <= 0:
|
|
break
|
|
if bytesleft != 0:
|
|
raise SyntaxError(
|
|
"Error reading channel [%r left]" % bytesleft
|
|
)
|
|
band = Image.frombuffer(
|
|
"L", pixel_size, b"".join(data), "raw", "L", 0, 1
|
|
)
|
|
im.im.putband(band.im, band_ix)
|
|
return {"RGB": im}
|
|
|
|
|
|
def read_mk(fobj, start_length, size):
|
|
# Alpha masks seem to be uncompressed
|
|
start = start_length[0]
|
|
fobj.seek(start)
|
|
pixel_size = (size[0] * size[2], size[1] * size[2])
|
|
sizesq = pixel_size[0] * pixel_size[1]
|
|
band = Image.frombuffer(
|
|
"L", pixel_size, fobj.read(sizesq), "raw", "L", 0, 1
|
|
)
|
|
return {"A": band}
|
|
|
|
|
|
def read_png_or_jpeg2000(fobj, start_length, size):
|
|
(start, length) = start_length
|
|
fobj.seek(start)
|
|
sig = fobj.read(12)
|
|
if sig[:8] == b'\x89PNG\x0d\x0a\x1a\x0a':
|
|
fobj.seek(start)
|
|
im = PngImagePlugin.PngImageFile(fobj)
|
|
return {"RGBA": im}
|
|
elif sig[:4] == b'\xff\x4f\xff\x51' \
|
|
or sig[:4] == b'\x0d\x0a\x87\x0a' \
|
|
or sig == b'\x00\x00\x00\x0cjP \x0d\x0a\x87\x0a':
|
|
if not enable_jpeg2k:
|
|
raise ValueError('Unsupported icon subimage format (rebuild PIL '
|
|
'with JPEG 2000 support to fix this)')
|
|
# j2k, jpc or j2c
|
|
fobj.seek(start)
|
|
jp2kstream = fobj.read(length)
|
|
f = io.BytesIO(jp2kstream)
|
|
im = Jpeg2KImagePlugin.Jpeg2KImageFile(f)
|
|
if im.mode != 'RGBA':
|
|
im = im.convert('RGBA')
|
|
return {"RGBA": im}
|
|
else:
|
|
raise ValueError('Unsupported icon subimage format')
|
|
|
|
|
|
class IcnsFile(object):
|
|
|
|
SIZES = {
|
|
(512, 512, 2): [
|
|
(b'ic10', read_png_or_jpeg2000),
|
|
],
|
|
(512, 512, 1): [
|
|
(b'ic09', read_png_or_jpeg2000),
|
|
],
|
|
(256, 256, 2): [
|
|
(b'ic14', read_png_or_jpeg2000),
|
|
],
|
|
(256, 256, 1): [
|
|
(b'ic08', read_png_or_jpeg2000),
|
|
],
|
|
(128, 128, 2): [
|
|
(b'ic13', read_png_or_jpeg2000),
|
|
],
|
|
(128, 128, 1): [
|
|
(b'ic07', read_png_or_jpeg2000),
|
|
(b'it32', read_32t),
|
|
(b't8mk', read_mk),
|
|
],
|
|
(64, 64, 1): [
|
|
(b'icp6', read_png_or_jpeg2000),
|
|
],
|
|
(32, 32, 2): [
|
|
(b'ic12', read_png_or_jpeg2000),
|
|
],
|
|
(48, 48, 1): [
|
|
(b'ih32', read_32),
|
|
(b'h8mk', read_mk),
|
|
],
|
|
(32, 32, 1): [
|
|
(b'icp5', read_png_or_jpeg2000),
|
|
(b'il32', read_32),
|
|
(b'l8mk', read_mk),
|
|
],
|
|
(16, 16, 2): [
|
|
(b'ic11', read_png_or_jpeg2000),
|
|
],
|
|
(16, 16, 1): [
|
|
(b'icp4', read_png_or_jpeg2000),
|
|
(b'is32', read_32),
|
|
(b's8mk', read_mk),
|
|
],
|
|
}
|
|
|
|
def __init__(self, fobj):
|
|
"""
|
|
fobj is a file-like object as an icns resource
|
|
"""
|
|
# signature : (start, length)
|
|
self.dct = dct = {}
|
|
self.fobj = fobj
|
|
sig, filesize = nextheader(fobj)
|
|
if sig != b'icns':
|
|
raise SyntaxError('not an icns file')
|
|
i = HEADERSIZE
|
|
while i < filesize:
|
|
sig, blocksize = nextheader(fobj)
|
|
if blocksize <= 0:
|
|
raise SyntaxError('invalid block header')
|
|
i += HEADERSIZE
|
|
blocksize -= HEADERSIZE
|
|
dct[sig] = (i, blocksize)
|
|
fobj.seek(blocksize, 1)
|
|
i += blocksize
|
|
|
|
def itersizes(self):
|
|
sizes = []
|
|
for size, fmts in self.SIZES.items():
|
|
for (fmt, reader) in fmts:
|
|
if fmt in self.dct:
|
|
sizes.append(size)
|
|
break
|
|
return sizes
|
|
|
|
def bestsize(self):
|
|
sizes = self.itersizes()
|
|
if not sizes:
|
|
raise SyntaxError("No 32bit icon resources found")
|
|
return max(sizes)
|
|
|
|
def dataforsize(self, size):
|
|
"""
|
|
Get an icon resource as {channel: array}. Note that
|
|
the arrays are bottom-up like windows bitmaps and will likely
|
|
need to be flipped or transposed in some way.
|
|
"""
|
|
dct = {}
|
|
for code, reader in self.SIZES[size]:
|
|
desc = self.dct.get(code)
|
|
if desc is not None:
|
|
dct.update(reader(self.fobj, desc, size))
|
|
return dct
|
|
|
|
def getimage(self, size=None):
|
|
if size is None:
|
|
size = self.bestsize()
|
|
if len(size) == 2:
|
|
size = (size[0], size[1], 1)
|
|
channels = self.dataforsize(size)
|
|
|
|
im = channels.get('RGBA', None)
|
|
if im:
|
|
return im
|
|
|
|
im = channels.get("RGB").copy()
|
|
try:
|
|
im.putalpha(channels["A"])
|
|
except KeyError:
|
|
pass
|
|
return im
|
|
|
|
|
|
##
|
|
# Image plugin for Mac OS icons.
|
|
|
|
class IcnsImageFile(ImageFile.ImageFile):
|
|
"""
|
|
PIL image support for Mac OS .icns files.
|
|
Chooses the best resolution, but will possibly load
|
|
a different size image if you mutate the size attribute
|
|
before calling 'load'.
|
|
|
|
The info dictionary has a key 'sizes' that is a list
|
|
of sizes that the icns file has.
|
|
"""
|
|
|
|
format = "ICNS"
|
|
format_description = "Mac OS icns resource"
|
|
|
|
def _open(self):
|
|
self.icns = IcnsFile(self.fp)
|
|
self.mode = 'RGBA'
|
|
self.best_size = self.icns.bestsize()
|
|
self.size = (self.best_size[0] * self.best_size[2],
|
|
self.best_size[1] * self.best_size[2])
|
|
self.info['sizes'] = self.icns.itersizes()
|
|
# Just use this to see if it's loaded or not yet.
|
|
self.tile = ('',)
|
|
|
|
def load(self):
|
|
if len(self.size) == 3:
|
|
self.best_size = self.size
|
|
self.size = (self.best_size[0] * self.best_size[2],
|
|
self.best_size[1] * self.best_size[2])
|
|
|
|
Image.Image.load(self)
|
|
if not self.tile:
|
|
return
|
|
self.load_prepare()
|
|
# This is likely NOT the best way to do it, but whatever.
|
|
im = self.icns.getimage(self.best_size)
|
|
|
|
# If this is a PNG or JPEG 2000, it won't be loaded yet
|
|
im.load()
|
|
|
|
self.im = im.im
|
|
self.mode = im.mode
|
|
self.size = im.size
|
|
self.fp = None
|
|
self.icns = None
|
|
self.tile = ()
|
|
self.load_end()
|
|
|
|
|
|
def _save(im, fp, filename):
|
|
"""
|
|
Saves the image as a series of PNG files,
|
|
that are then converted to a .icns file
|
|
using the OS X command line utility 'iconutil'.
|
|
|
|
OS X only.
|
|
"""
|
|
if hasattr(fp, "flush"):
|
|
fp.flush()
|
|
|
|
# create the temporary set of pngs
|
|
iconset = tempfile.mkdtemp('.iconset')
|
|
last_w = None
|
|
last_im = None
|
|
for w in [16, 32, 128, 256, 512]:
|
|
prefix = 'icon_{}x{}'.format(w, w)
|
|
|
|
if last_w == w:
|
|
im_scaled = last_im
|
|
else:
|
|
im_scaled = im.resize((w, w), Image.LANCZOS)
|
|
im_scaled.save(os.path.join(iconset, prefix+'.png'))
|
|
|
|
im_scaled = im.resize((w*2, w*2), Image.LANCZOS)
|
|
im_scaled.save(os.path.join(iconset, prefix+'@2x.png'))
|
|
last_im = im_scaled
|
|
|
|
# iconutil -c icns -o {} {}
|
|
from subprocess import Popen, PIPE, CalledProcessError
|
|
|
|
convert_cmd = ["iconutil", "-c", "icns", "-o", filename, iconset]
|
|
stderr = tempfile.TemporaryFile()
|
|
convert_proc = Popen(convert_cmd, stdout=PIPE, stderr=stderr)
|
|
|
|
convert_proc.stdout.close()
|
|
|
|
retcode = convert_proc.wait()
|
|
|
|
# remove the temporary files
|
|
shutil.rmtree(iconset)
|
|
|
|
if retcode:
|
|
raise CalledProcessError(retcode, convert_cmd)
|
|
|
|
Image.register_open(IcnsImageFile.format, IcnsImageFile,
|
|
lambda x: x[:4] == b'icns')
|
|
Image.register_extension(IcnsImageFile.format, '.icns')
|
|
|
|
if sys.platform == 'darwin':
|
|
Image.register_save(IcnsImageFile.format, _save)
|
|
|
|
Image.register_mime(IcnsImageFile.format, "image/icns")
|
|
|
|
|
|
if __name__ == '__main__':
|
|
imf = IcnsImageFile(open(sys.argv[1], 'rb'))
|
|
for size in imf.info['sizes']:
|
|
imf.size = size
|
|
imf.load()
|
|
im = imf.im
|
|
im.save('out-%s-%s-%s.png' % size)
|
|
im = Image.open(open(sys.argv[1], "rb"))
|
|
im.save("out.png")
|
|
if sys.platform == 'windows':
|
|
os.startfile("out.png")
|