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Merge pull request #736 from hugovk/arg
Remove obsolete Animated Raster Graphics (ARG) support
This commit is contained in:
Alex Clark ☺
commit
c28dfce2f9
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@ -1,506 +0,0 @@
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#
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# THIS IS WORK IN PROGRESS
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#
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# The Python Imaging Library.
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# $Id$
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#
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# ARG animation support code
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#
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# history:
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# 1996-12-30 fl Created
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# 1996-01-06 fl Added safe scripting environment
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# 1996-01-10 fl Added JHDR, UHDR and sYNC support
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# 2005-03-02 fl Removed AAPP and ARUN support
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#
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# Copyright (c) Secret Labs AB 1997.
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# Copyright (c) Fredrik Lundh 1996-97.
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#
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# See the README file for information on usage and redistribution.
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#
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from __future__ import print_function
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__version__ = "0.4"
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from PIL import Image, ImageFile, ImagePalette
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from PIL.PngImagePlugin import i8, i16, i32, ChunkStream, _MODES
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MAGIC = b"\212ARG\r\n\032\n"
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# --------------------------------------------------------------------
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# ARG parser
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class ArgStream(ChunkStream):
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"Parser callbacks for ARG data"
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def __init__(self, fp):
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ChunkStream.__init__(self, fp)
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self.eof = 0
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self.im = None
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self.palette = None
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self.__reset()
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def __reset(self):
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# reset decoder state (called on init and sync)
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self.count = 0
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self.id = None
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self.action = ("NONE",)
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self.images = {}
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self.names = {}
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def chunk_AHDR(self, offset, bytes):
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"AHDR -- animation header"
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# assertions
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if self.count != 0:
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raise SyntaxError("misplaced AHDR chunk")
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s = self.fp.read(bytes)
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self.size = i32(s), i32(s[4:])
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try:
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self.mode, self.rawmode = _MODES[(i8(s[8]), i8(s[9]))]
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except:
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raise SyntaxError("unknown ARG mode")
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if Image.DEBUG:
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print("AHDR size", self.size)
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print("AHDR mode", self.mode, self.rawmode)
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return s
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def chunk_AFRM(self, offset, bytes):
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"AFRM -- next frame follows"
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# assertions
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if self.count != 0:
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raise SyntaxError("misplaced AFRM chunk")
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self.show = 1
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self.id = 0
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self.count = 1
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self.repair = None
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s = self.fp.read(bytes)
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if len(s) >= 2:
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self.id = i16(s)
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if len(s) >= 4:
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self.count = i16(s[2:4])
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if len(s) >= 6:
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self.repair = i16(s[4:6])
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else:
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self.repair = None
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if Image.DEBUG:
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print("AFRM", self.id, self.count)
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return s
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def chunk_ADEF(self, offset, bytes):
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"ADEF -- store image"
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# assertions
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if self.count != 0:
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raise SyntaxError("misplaced ADEF chunk")
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self.show = 0
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self.id = 0
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self.count = 1
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self.repair = None
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s = self.fp.read(bytes)
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if len(s) >= 2:
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self.id = i16(s)
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if len(s) >= 4:
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self.count = i16(s[2:4])
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if Image.DEBUG:
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print("ADEF", self.id, self.count)
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return s
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def chunk_NAME(self, offset, bytes):
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"NAME -- name the current image"
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# assertions
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if self.count == 0:
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raise SyntaxError("misplaced NAME chunk")
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name = self.fp.read(bytes)
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self.names[self.id] = name
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return name
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def chunk_AEND(self, offset, bytes):
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"AEND -- end of animation"
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if Image.DEBUG:
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print("AEND")
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self.eof = 1
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raise EOFError("end of ARG file")
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def __getmodesize(self, s, full=1):
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size = i32(s), i32(s[4:])
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try:
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mode, rawmode = _MODES[(i8(s[8]), i8(s[9]))]
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except:
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raise SyntaxError("unknown image mode")
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if full:
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if i8(s[12]):
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pass # interlace not yet supported
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if i8(s[11]):
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raise SyntaxError("unknown filter category")
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return size, mode, rawmode
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def chunk_PAST(self, offset, bytes):
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"PAST -- paste one image into another"
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# assertions
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if self.count == 0:
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raise SyntaxError("misplaced PAST chunk")
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if self.repair is not None:
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# we must repair the target image before we
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# start pasting
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# brute force; a better solution would be to
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# update only the dirty rectangles in images[id].
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# note that if images[id] doesn't exist, it must
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# be created
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self.images[self.id] = self.images[self.repair].copy()
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self.repair = None
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s = self.fp.read(bytes)
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im = self.images[i16(s)]
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x, y = i32(s[2:6]), i32(s[6:10])
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bbox = x, y, im.size[0]+x, im.size[1]+y
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if im.mode in ["RGBA"]:
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# paste with transparency
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# FIXME: should handle P+transparency as well
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self.images[self.id].paste(im, bbox, im)
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else:
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# paste without transparency
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self.images[self.id].paste(im, bbox)
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self.action = ("PAST",)
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self.__store()
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return s
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def chunk_BLNK(self, offset, bytes):
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"BLNK -- create blank image"
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# assertions
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if self.count == 0:
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raise SyntaxError("misplaced BLNK chunk")
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s = self.fp.read(bytes)
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size, mode, rawmode = self.__getmodesize(s, 0)
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# store image (FIXME: handle colour)
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self.action = ("BLNK",)
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self.im = Image.core.fill(mode, size, 0)
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self.__store()
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return s
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def chunk_IHDR(self, offset, bytes):
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"IHDR -- full image follows"
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# assertions
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if self.count == 0:
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raise SyntaxError("misplaced IHDR chunk")
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# image header
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s = self.fp.read(bytes)
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size, mode, rawmode = self.__getmodesize(s)
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# decode and store image
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self.action = ("IHDR",)
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self.im = Image.core.new(mode, size)
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self.decoder = Image.core.zip_decoder(rawmode)
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self.decoder.setimage(self.im, (0,0) + size)
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self.data = b""
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return s
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def chunk_DHDR(self, offset, bytes):
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"DHDR -- delta image follows"
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# assertions
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if self.count == 0:
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raise SyntaxError("misplaced DHDR chunk")
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s = self.fp.read(bytes)
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size, mode, rawmode = self.__getmodesize(s)
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# delta header
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diff = i8(s[13])
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offs = i32(s[14:18]), i32(s[18:22])
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bbox = offs + (offs[0]+size[0], offs[1]+size[1])
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if Image.DEBUG:
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print("DHDR", diff, bbox)
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# FIXME: decode and apply image
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self.action = ("DHDR", diff, bbox)
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# setup decoder
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self.im = Image.core.new(mode, size)
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self.decoder = Image.core.zip_decoder(rawmode)
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self.decoder.setimage(self.im, (0,0) + size)
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self.data = b""
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return s
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def chunk_JHDR(self, offset, bytes):
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"JHDR -- JPEG image follows"
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# assertions
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if self.count == 0:
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raise SyntaxError("misplaced JHDR chunk")
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# image header
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s = self.fp.read(bytes)
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size, mode, rawmode = self.__getmodesize(s, 0)
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# decode and store image
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self.action = ("JHDR",)
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self.im = Image.core.new(mode, size)
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self.decoder = Image.core.jpeg_decoder(rawmode)
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self.decoder.setimage(self.im, (0,0) + size)
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self.data = b""
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return s
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def chunk_UHDR(self, offset, bytes):
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"UHDR -- uncompressed image data follows (EXPERIMENTAL)"
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# assertions
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if self.count == 0:
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raise SyntaxError("misplaced UHDR chunk")
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# image header
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s = self.fp.read(bytes)
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size, mode, rawmode = self.__getmodesize(s, 0)
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# decode and store image
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self.action = ("UHDR",)
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self.im = Image.core.new(mode, size)
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self.decoder = Image.core.raw_decoder(rawmode)
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self.decoder.setimage(self.im, (0,0) + size)
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self.data = b""
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return s
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def chunk_IDAT(self, offset, bytes):
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"IDAT -- image data block"
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# pass compressed chunks through the decoder
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s = self.fp.read(bytes)
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self.data = self.data + s
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n, e = self.decoder.decode(self.data)
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if n < 0:
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# end of image
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if e < 0:
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raise IOError("decoder error %d" % e)
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else:
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self.data = self.data[n:]
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return s
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def chunk_DEND(self, offset, bytes):
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return self.chunk_IEND(offset, bytes)
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def chunk_JEND(self, offset, bytes):
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return self.chunk_IEND(offset, bytes)
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def chunk_UEND(self, offset, bytes):
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return self.chunk_IEND(offset, bytes)
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def chunk_IEND(self, offset, bytes):
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"IEND -- end of image"
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# we now have a new image. carry out the operation
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# defined by the image header.
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# won't need these anymore
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del self.decoder
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del self.data
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self.__store()
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return self.fp.read(bytes)
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def __store(self):
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# apply operation
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cid = self.action[0]
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if cid in ["BLNK", "IHDR", "JHDR", "UHDR"]:
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# store
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self.images[self.id] = self.im
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elif cid == "DHDR":
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# paste
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cid, mode, bbox = self.action
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im0 = self.images[self.id]
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im1 = self.im
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if mode == 0:
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im1 = im1.chop_add_modulo(im0.crop(bbox))
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im0.paste(im1, bbox)
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self.count -= 1
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if self.count == 0 and self.show:
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self.im = self.images[self.id]
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raise EOFError # end of this frame
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def chunk_PLTE(self, offset, bytes):
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"PLTE -- palette data"
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s = self.fp.read(bytes)
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if self.mode == "P":
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self.palette = ImagePalette.raw("RGB", s)
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return s
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def chunk_sYNC(self, offset, bytes):
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"SYNC -- reset decoder"
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if self.count != 0:
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raise SyntaxError("misplaced sYNC chunk")
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s = self.fp.read(bytes)
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self.__reset()
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return s
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# --------------------------------------------------------------------
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# ARG reader
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def _accept(prefix):
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return prefix[:8] == MAGIC
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##
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# Image plugin for the experimental Animated Raster Graphics format.
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class ArgImageFile(ImageFile.ImageFile):
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format = "ARG"
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format_description = "Animated raster graphics"
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def _open(self):
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if Image.warnings:
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Image.warnings.warn(
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"The ArgImagePlugin driver is obsolete, and will be removed "
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"from a future release of PIL. If you rely on this module, "
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"please contact the PIL authors.",
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RuntimeWarning
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)
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if self.fp.read(8) != MAGIC:
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raise SyntaxError("not an ARG file")
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self.arg = ArgStream(self.fp)
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# read and process the first chunk (AHDR)
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cid, offset, bytes = self.arg.read()
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if cid != "AHDR":
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raise SyntaxError("expected an AHDR chunk")
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s = self.arg.call(cid, offset, bytes)
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self.arg.crc(cid, s)
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# image characteristics
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self.mode = self.arg.mode
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self.size = self.arg.size
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def load(self):
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if self.arg.im is None:
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self.seek(0)
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# image data
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self.im = self.arg.im
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self.palette = self.arg.palette
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# set things up for further processing
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Image.Image.load(self)
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def seek(self, frame):
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if self.arg.eof:
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raise EOFError("end of animation")
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self.fp = self.arg.fp
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while True:
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|
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#
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# process chunks
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|
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cid, offset, bytes = self.arg.read()
|
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|
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if self.arg.eof:
|
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raise EOFError("end of animation")
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try:
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s = self.arg.call(cid, offset, bytes)
|
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except EOFError:
|
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break
|
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|
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except "glurk": # AttributeError
|
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if Image.DEBUG:
|
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print(cid, bytes, "(unknown)")
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s = self.fp.read(bytes)
|
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self.arg.crc(cid, s)
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self.fp.read(4) # ship extra CRC
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|
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def tell(self):
|
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return 0
|
||||
|
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def verify(self):
|
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"Verify ARG file"
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||||
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# back up to first chunk
|
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self.fp.seek(8)
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|
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self.arg.verify(self)
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self.arg.close()
|
||||
|
||||
self.fp = None
|
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|
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#
|
||||
# --------------------------------------------------------------------
|
||||
|
||||
Image.register_open("ARG", ArgImageFile, _accept)
|
||||
|
||||
Image.register_extension("ARG", ".arg")
|
||||
|
||||
Image.register_mime("ARG", "video/x-arg")
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|
|
@ -14,8 +14,7 @@
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VERSION = '1.1.7' # PIL version
|
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PILLOW_VERSION = '2.4.0' # Pillow
|
||||
|
||||
_plugins = ['ArgImagePlugin',
|
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'BmpImagePlugin',
|
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_plugins = ['BmpImagePlugin',
|
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'BufrStubImagePlugin',
|
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'CurImagePlugin',
|
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'DcxImagePlugin',
|
||||
|
|
|
|||
|
|
@ -18,25 +18,6 @@ import sys
|
|||
Image.DEBUG = 0
|
||||
|
||||
|
||||
# --------------------------------------------------------------------
|
||||
# experimental: support ARG animation scripts
|
||||
|
||||
import ArgImagePlugin
|
||||
|
||||
def applet_hook(animation, images):
|
||||
app = animation(animation_display, images)
|
||||
app.run()
|
||||
|
||||
ArgImagePlugin.APPLET_HOOK = applet_hook
|
||||
|
||||
class AppletDisplay:
|
||||
def __init__(self, ui):
|
||||
self.__ui = ui
|
||||
def paste(self, im, bbox):
|
||||
self.__ui.image.paste(im, bbox)
|
||||
def update(self):
|
||||
self.__ui.update_idletasks()
|
||||
|
||||
# --------------------------------------------------------------------
|
||||
# an image animation player
|
||||
|
||||
|
|
@ -56,10 +37,6 @@ class UI(Label):
|
|||
else:
|
||||
self.image = ImageTk.PhotoImage(im)
|
||||
|
||||
# APPLET SUPPORT (very crude, and not 100% safe)
|
||||
global animation_display
|
||||
animation_display = AppletDisplay(self)
|
||||
|
||||
Label.__init__(self, master, image=self.image, bg="black", bd=0)
|
||||
|
||||
self.update()
|
||||
|
|
|
|||
|
|
@ -1,14 +1,6 @@
|
|||
Plugin reference
|
||||
================
|
||||
|
||||
:mod:`ArgImagePlugin` Module
|
||||
----------------------------
|
||||
|
||||
.. automodule:: PIL.ArgImagePlugin
|
||||
:members:
|
||||
:undoc-members:
|
||||
:show-inheritance:
|
||||
|
||||
:mod:`BmpImagePlugin` Module
|
||||
----------------------------
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user