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Diffstat (limited to 'PIL/IcnsImagePlugin.py')
| -rw-r--r-- | PIL/IcnsImagePlugin.py | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/PIL/IcnsImagePlugin.py b/PIL/IcnsImagePlugin.py deleted file mode 100644 index a85695d..0000000 --- a/PIL/IcnsImagePlugin.py +++ /dev/null @@ -1,211 +0,0 @@ -# -# The Python Imaging Library. -# $Id: ImImagePlugin.py 2134 2004-10-06 08:55:20Z fredrik $ -# -# 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. -# -# See the README file for information on usage and redistribution. -# - -import Image, ImageFile -import string, struct - -HEADERSIZE = 8 - -def nextheader(fobj): - return struct.unpack('>4sI', fobj.read(HEADERSIZE)) - -def read_32t(fobj, (start, length), (width, height)): - # The 128x128 icon seems to have an extra header for some reason. - fobj.seek(start) - sig = fobj.read(4) - if sig != '\x00\x00\x00\x00': - raise SyntaxError, 'Unknown signature, expecting 0x00000000' - return read_32(fobj, (start + 4, length - 4), (width, height)) - -def read_32(fobj, (start, length), size): - """ - Read a 32bit RGB icon resource. Seems to be either uncompressed or - an RLE packbits-like scheme. - """ - fobj.seek(start) - sizesq = size[0] * size[1] - if length == sizesq * 3: - # uncompressed ("RGBRGBGB") - indata = fobj.read(length) - im = Image.frombuffer("RGB", size, indata, "raw", "RGB", 0, 1) - else: - # decode image - im = Image.new("RGB", size, None) - for band_ix in range(3): - data = [] - bytesleft = sizesq - while bytesleft > 0: - byte = fobj.read(1) - if not byte: - break - byte = ord(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 = bytesleft - blocksize - if bytesleft <= 0: - break - if bytesleft != 0: - raise SyntaxError( - "Error reading %r channel [%r]" % (channel, bytesleft) - ) - band = Image.frombuffer( - "L", size, string.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 - fobj.seek(start) - band = Image.frombuffer( - "L", size, fobj.read(size[0]*size[1]), "raw", "L", 0, 1 - ) - return {"A": band} - -class IcnsFile: - - SIZES = { - (128, 128): [ - ('it32', read_32t), - ('t8mk', read_mk), - ], - (48, 48): [ - ('ih32', read_32), - ('h8mk', read_mk), - ], - (32, 32): [ - ('il32', read_32), - ('l8mk', read_mk), - ], - (16, 16): [ - ('is32', read_32), - ('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 != 'icns': - raise SyntaxError, 'not an icns file' - i = HEADERSIZE - while i < filesize: - sig, blocksize = nextheader(fobj) - i = i + HEADERSIZE - blocksize = blocksize - HEADERSIZE - dct[sig] = (i, blocksize) - fobj.seek(blocksize, 1) - i = i + blocksize - - def itersizes(self): - sizes = [] - for size, fmts in self.SIZES.items(): - for (fmt, reader) in fmts: - if self.dct.has_key(fmt): - 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() - channels = self.dataforsize(size) - 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 read-only 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.size = self.icns.bestsize() - self.info['sizes'] = self.icns.itersizes() - # Just use this to see if it's loaded or not yet. - self.tile = ('',) - - def load(self): - 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.size) - self.im = im.im - self.mode = im.mode - self.size = im.size - self.fp = None - self.icns = None - self.tile = () - self.load_end() - - -Image.register_open("ICNS", IcnsImageFile, lambda x: x[:4] == 'icns') -Image.register_extension("ICNS", '.icns') - -if __name__ == '__main__': - import os, sys - im = Image.open(open(sys.argv[1], "rb")) - im.save("out.png") - os.startfile("out.png") |