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Diffstat (limited to 'PIL/ArgImagePlugin.py')
| -rw-r--r-- | PIL/ArgImagePlugin.py | 498 |
1 files changed, 0 insertions, 498 deletions
diff --git a/PIL/ArgImagePlugin.py b/PIL/ArgImagePlugin.py deleted file mode 100644 index 48582d9..0000000 --- a/PIL/ArgImagePlugin.py +++ /dev/null @@ -1,498 +0,0 @@ -# -# THIS IS WORK IN PROGRESS -# -# The Python Imaging Library. -# $Id: ArgImagePlugin.py 2309 2005-03-02 15:06:34Z fredrik $ -# -# ARG animation support code -# -# history: -# 1996-12-30 fl Created -# 1996-01-06 fl Added safe scripting environment -# 1996-01-10 fl Added JHDR, UHDR and sYNC support -# 2005-03-02 fl Removed AAPP and ARUN support -# -# Copyright (c) Secret Labs AB 1997. -# Copyright (c) Fredrik Lundh 1996-97. -# -# See the README file for information on usage and redistribution. -# - -__version__ = "0.4" - -import marshal, string - -import Image, ImageFile, ImagePalette - -from PngImagePlugin import i16, i32, ChunkStream, _MODES - -MAGIC = "\212ARG\r\n\032\n" - -# -------------------------------------------------------------------- -# ARG parser - -class ArgStream(ChunkStream): - "Parser callbacks for ARG data" - - def __init__(self, fp): - - ChunkStream.__init__(self, fp) - - self.eof = 0 - - self.im = None - self.palette = None - - self.__reset() - - def __reset(self): - - # reset decoder state (called on init and sync) - - self.count = 0 - self.id = None - self.action = ("NONE",) - - self.images = {} - self.names = {} - - - def chunk_AHDR(self, offset, bytes): - "AHDR -- animation header" - - # assertions - if self.count != 0: - raise SyntaxError, "misplaced AHDR chunk" - - s = self.fp.read(bytes) - self.size = i32(s), i32(s[4:]) - try: - self.mode, self.rawmode = _MODES[(ord(s[8]), ord(s[9]))] - except: - raise SyntaxError, "unknown ARG mode" - - if Image.DEBUG: - print "AHDR size", self.size - print "AHDR mode", self.mode, self.rawmode - - return s - - def chunk_AFRM(self, offset, bytes): - "AFRM -- next frame follows" - - # assertions - if self.count != 0: - raise SyntaxError, "misplaced AFRM chunk" - - self.show = 1 - self.id = 0 - self.count = 1 - self.repair = None - - s = self.fp.read(bytes) - if len(s) >= 2: - self.id = i16(s) - if len(s) >= 4: - self.count = i16(s[2:4]) - if len(s) >= 6: - self.repair = i16(s[4:6]) - else: - self.repair = None - - if Image.DEBUG: - print "AFRM", self.id, self.count - - return s - - def chunk_ADEF(self, offset, bytes): - "ADEF -- store image" - - # assertions - if self.count != 0: - raise SyntaxError, "misplaced ADEF chunk" - - self.show = 0 - self.id = 0 - self.count = 1 - self.repair = None - - s = self.fp.read(bytes) - if len(s) >= 2: - self.id = i16(s) - if len(s) >= 4: - self.count = i16(s[2:4]) - - if Image.DEBUG: - print "ADEF", self.id, self.count - - return s - - def chunk_NAME(self, offset, bytes): - "NAME -- name the current image" - - # assertions - if self.count == 0: - raise SyntaxError, "misplaced NAME chunk" - - name = self.fp.read(bytes) - self.names[self.id] = name - - return name - - def chunk_AEND(self, offset, bytes): - "AEND -- end of animation" - - if Image.DEBUG: - print "AEND" - - self.eof = 1 - - raise EOFError, "end of ARG file" - - def __getmodesize(self, s, full=1): - - size = i32(s), i32(s[4:]) - - try: - mode, rawmode = _MODES[(ord(s[8]), ord(s[9]))] - except: - raise SyntaxError, "unknown image mode" - - if full: - if ord(s[12]): - pass # interlace not yet supported - if ord(s[11]): - raise SyntaxError, "unknown filter category" - - return size, mode, rawmode - - def chunk_PAST(self, offset, bytes): - "PAST -- paste one image into another" - - # assertions - if self.count == 0: - raise SyntaxError, "misplaced PAST chunk" - - if self.repair is not None: - # we must repair the target image before we - # start pasting - - # brute force; a better solution would be to - # update only the dirty rectangles in images[id]. - # note that if images[id] doesn't exist, it must - # be created - - self.images[self.id] = self.images[self.repair].copy() - self.repair = None - - s = self.fp.read(bytes) - im = self.images[i16(s)] - x, y = i32(s[2:6]), i32(s[6:10]) - bbox = x, y, im.size[0]+x, im.size[1]+y - - if im.mode in ["RGBA"]: - # paste with transparency - # FIXME: should handle P+transparency as well - self.images[self.id].paste(im, bbox, im) - else: - # paste without transparency - self.images[self.id].paste(im, bbox) - - self.action = ("PAST",) - self.__store() - - return s - - def chunk_BLNK(self, offset, bytes): - "BLNK -- create blank image" - - # assertions - if self.count == 0: - raise SyntaxError, "misplaced BLNK chunk" - - s = self.fp.read(bytes) - size, mode, rawmode = self.__getmodesize(s, 0) - - # store image (FIXME: handle colour) - self.action = ("BLNK",) - self.im = Image.core.fill(mode, size, 0) - self.__store() - - return s - - def chunk_IHDR(self, offset, bytes): - "IHDR -- full image follows" - - # assertions - if self.count == 0: - raise SyntaxError, "misplaced IHDR chunk" - - # image header - s = self.fp.read(bytes) - size, mode, rawmode = self.__getmodesize(s) - - # decode and store image - self.action = ("IHDR",) - self.im = Image.core.new(mode, size) - self.decoder = Image.core.zip_decoder(rawmode) - self.decoder.setimage(self.im, (0,0) + size) - self.data = "" - - return s - - def chunk_DHDR(self, offset, bytes): - "DHDR -- delta image follows" - - # assertions - if self.count == 0: - raise SyntaxError, "misplaced DHDR chunk" - - s = self.fp.read(bytes) - - size, mode, rawmode = self.__getmodesize(s) - - # delta header - diff = ord(s[13]) - offs = i32(s[14:18]), i32(s[18:22]) - - bbox = offs + (offs[0]+size[0], offs[1]+size[1]) - - if Image.DEBUG: - print "DHDR", diff, bbox - - # FIXME: decode and apply image - self.action = ("DHDR", diff, bbox) - - # setup decoder - self.im = Image.core.new(mode, size) - - self.decoder = Image.core.zip_decoder(rawmode) - self.decoder.setimage(self.im, (0,0) + size) - - self.data = "" - - return s - - def chunk_JHDR(self, offset, bytes): - "JHDR -- JPEG image follows" - - # assertions - if self.count == 0: - raise SyntaxError, "misplaced JHDR chunk" - - # image header - s = self.fp.read(bytes) - size, mode, rawmode = self.__getmodesize(s, 0) - - # decode and store image - self.action = ("JHDR",) - self.im = Image.core.new(mode, size) - self.decoder = Image.core.jpeg_decoder(rawmode) - self.decoder.setimage(self.im, (0,0) + size) - self.data = "" - - return s - - def chunk_UHDR(self, offset, bytes): - "UHDR -- uncompressed image data follows (EXPERIMENTAL)" - - # assertions - if self.count == 0: - raise SyntaxError, "misplaced UHDR chunk" - - # image header - s = self.fp.read(bytes) - size, mode, rawmode = self.__getmodesize(s, 0) - - # decode and store image - self.action = ("UHDR",) - self.im = Image.core.new(mode, size) - self.decoder = Image.core.raw_decoder(rawmode) - self.decoder.setimage(self.im, (0,0) + size) - self.data = "" - - return s - - def chunk_IDAT(self, offset, bytes): - "IDAT -- image data block" - - # pass compressed chunks through the decoder - s = self.fp.read(bytes) - self.data = self.data + s - n, e = self.decoder.decode(self.data) - if n < 0: - # end of image - if e < 0: - raise IOError, "decoder error %d" % e - else: - self.data = self.data[n:] - - return s - - def chunk_DEND(self, offset, bytes): - return self.chunk_IEND(offset, bytes) - - def chunk_JEND(self, offset, bytes): - return self.chunk_IEND(offset, bytes) - - def chunk_UEND(self, offset, bytes): - return self.chunk_IEND(offset, bytes) - - def chunk_IEND(self, offset, bytes): - "IEND -- end of image" - - # we now have a new image. carry out the operation - # defined by the image header. - - # won't need these anymore - del self.decoder - del self.data - - self.__store() - - return self.fp.read(bytes) - - def __store(self): - - # apply operation - cid = self.action[0] - - if cid in ["BLNK", "IHDR", "JHDR", "UHDR"]: - # store - self.images[self.id] = self.im - - elif cid == "DHDR": - # paste - cid, mode, bbox = self.action - im0 = self.images[self.id] - im1 = self.im - if mode == 0: - im1 = im1.chop_add_modulo(im0.crop(bbox)) - im0.paste(im1, bbox) - - self.count = self.count - 1 - - if self.count == 0 and self.show: - self.im = self.images[self.id] - raise EOFError # end of this frame - - def chunk_PLTE(self, offset, bytes): - "PLTE -- palette data" - - s = self.fp.read(bytes) - if self.mode == "P": - self.palette = ImagePalette.raw("RGB", s) - return s - - def chunk_sYNC(self, offset, bytes): - "SYNC -- reset decoder" - - if self.count != 0: - raise SyntaxError, "misplaced sYNC chunk" - - s = self.fp.read(bytes) - self.__reset() - return s - - -# -------------------------------------------------------------------- -# ARG reader - -def _accept(prefix): - return prefix[:8] == MAGIC - -## -# Image plugin for the experimental Animated Raster Graphics format. - -class ArgImageFile(ImageFile.ImageFile): - - format = "ARG" - format_description = "Animated raster graphics" - - def _open(self): - - if self.fp.read(8) != MAGIC: - raise SyntaxError, "not an ARG file" - - self.arg = ArgStream(self.fp) - - # read and process the first chunk (AHDR) - - cid, offset, bytes = self.arg.read() - - if cid != "AHDR": - raise SyntaxError, "expected an AHDR chunk" - - s = self.arg.call(cid, offset, bytes) - - self.arg.crc(cid, s) - - # image characteristics - self.mode = self.arg.mode - self.size = self.arg.size - - def load(self): - - if self.arg.im is None: - self.seek(0) - - # image data - self.im = self.arg.im - self.palette = self.arg.palette - - # set things up for further processing - Image.Image.load(self) - - def seek(self, frame): - - if self.arg.eof: - raise EOFError, "end of animation" - - self.fp = self.arg.fp - - while 1: - - # - # process chunks - - cid, offset, bytes = self.arg.read() - - if self.arg.eof: - raise EOFError, "end of animation" - - try: - s = self.arg.call(cid, offset, bytes) - except EOFError: - break - - except "glurk": # AttributeError - if Image.DEBUG: - print cid, bytes, "(unknown)" - s = self.fp.read(bytes) - - self.arg.crc(cid, s) - - self.fp.read(4) # ship extra CRC - - def tell(self): - return 0 - - def verify(self): - "Verify ARG file" - - # back up to first chunk - self.fp.seek(8) - - self.arg.verify(self) - self.arg.close() - - self.fp = None - -# -# -------------------------------------------------------------------- - -Image.register_open("ARG", ArgImageFile, _accept) - -Image.register_extension("ARG", ".arg") - -Image.register_mime("ARG", "video/x-arg") |