def _open(self):
# header
s = self.fp.read(128)
if not _accept(s):
raise SyntaxError, "not a PCX file"
# image
bbox = i16(s, 4), i16(s, 6), i16(s, 8) + 1, i16(s, 10) + 1
if bbox[2] <= bbox[0] or bbox[3] <= bbox[1]:
raise SyntaxError, "bad PCX image size"
# format
version = ord(s[1])
bits = ord(s[3])
planes = ord(s[65])
stride = i16(s, 66)
self.info["dpi"] = i16(s, 12), i16(s, 14)
if bits == 1 and planes == 1:
mode = rawmode = "1"
elif bits == 1 and planes in (2, 4):
mode = "P"
rawmode = "P;%dL" % planes
self.palette = ImagePalette.raw("RGB", s[16:64])
elif version == 5 and bits == 8 and planes == 1:
mode = rawmode = "L"
# FIXME: hey, this doesn't work with the incremental loader !!!
self.fp.seek(-769, 2)
s = self.fp.read(769)
if len(s) == 769 and ord(s[0]) == 12:
# check if the palette is linear greyscale
for i in range(256):
if s[i * 3 + 1 : i * 3 + 4] != chr(i) * 3:
mode = rawmode = "P"
break
if mode == "P":
self.palette = ImagePalette.raw("RGB", s[1:])
self.fp.seek(128)
elif version == 5 and bits == 8 and planes == 3:
mode = "RGB"
rawmode = "RGB;L"
else:
raise IOError, "unknown PCX mode"
self.mode = mode
self.size = bbox[2] - bbox[0], bbox[3] - bbox[1]
bbox = (0, 0) + self.size
self.tile = [("pcx", bbox, self.fp.tell(), (rawmode, planes * stride))]
def _open(self):
# header
s = self.fp.read(128)
if not _accept(s):
raise SyntaxError, "not a PCX file"
# image
bbox = i16(s, 4), i16(s, 6), i16(s, 8) + 1, i16(s, 10) + 1
if bbox[2] <= bbox[0] or bbox[3] <= bbox[1]:
raise SyntaxError, "bad PCX image size"
# format
version = ord(s[1])
bits = ord(s[3])
planes = ord(s[65])
stride = i16(s, 66)
self.info["dpi"] = i16(s, 12), i16(s, 14)
if bits == 1 and planes == 1:
mode = rawmode = "1"
elif bits == 1 and planes in (2, 4):
mode = "P"
rawmode = "P;%dL" % planes
self.palette = ImagePalette.raw("RGB", s[16:64])
elif version == 5 and bits == 8 and planes == 1:
mode = rawmode = "L"
# FIXME: hey, this doesn't work with the incremental loader !!!
self.fp.seek(-769, 2)
s = self.fp.read(769)
if len(s) == 769 and ord(s[0]) == 12:
# check if the palette is linear greyscale
for i in range(256):
if s[i * 3 + 1:i * 3 + 4] != chr(i) * 3:
mode = rawmode = "P"
break
if mode == "P":
self.palette = ImagePalette.raw("RGB", s[1:])
self.fp.seek(128)
elif version == 5 and bits == 8 and planes == 3:
mode = "RGB"
rawmode = "RGB;L"
else:
raise IOError, "unknown PCX mode"
self.mode = mode
self.size = bbox[2] - bbox[0], bbox[3] - bbox[1]
bbox = (0, 0) + self.size
self.tile = [("pcx", bbox, self.fp.tell(), (rawmode, planes * stride))]
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_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 _open(self):
# check magic
s = self.fp.read(6)
if s != "P7 332":
raise SyntaxError, "not an XV thumbnail file"
# Skip to beginning of next line
self.fp.readline()
# skip info comments
while 1:
s = self.fp.readline()
if not s:
raise SyntaxError, "Unexpected EOF reading XV thumbnail file"
if s[0] != '#':
break
# parse header line (already read)
s = string.split(s.strip())
self.mode = "P"
self.size = int(s[0]), int(s[1])
self.palette = ImagePalette.raw("RGB", PALETTE)
self.tile = [("raw", (0, 0) + self.size, self.fp.tell(), (self.mode, 0,
1))]
def _open(self):
# check magic
s = self.fp.read(6)
if s != "P7 332":
raise SyntaxError, "not an XV thumbnail file"
# Skip to beginning of next line
self.fp.readline()
# skip info comments
while 1:
s = self.fp.readline()
if not s:
raise SyntaxError, "Unexpected EOF reading XV thumbnail file"
if s[0] != '#':
break
# parse header line (already read)
s = string.split(s.strip())
self.mode = "P"
self.size = int(s[0]), int(s[1])
self.palette = ImagePalette.raw("RGB", PALETTE)
self.tile = [
("raw", (0, 0)+self.size,
self.fp.tell(), (self.mode, 0, 1)
)]
def _open(self):
# Screen
s = self.fp.read(13)
if s[:6] not in ["GIF87a", "GIF89a"]:
raise SyntaxError, "not a GIF file"
self.info["version"] = s[:6]
self.size = i16(s[6:]), i16(s[8:])
self.tile = []
flags = ord(s[10])
bits = (flags & 7) + 1
if flags & 128:
# get global palette
self.info["background"] = ord(s[11])
# check if palette contains colour indices
p = self.fp.read(3<<bits)
for i in range(0, len(p), 3):
if not (chr(i/3) == p[i] == p[i+1] == p[i+2]):
p = ImagePalette.raw("RGB", p)
self.global_palette = self.palette = p
break
self.__fp = self.fp # FIXME: hack
self.__rewind = self.fp.tell()
self.seek(0) # get ready to read first frame
def _open(self):
# Header
s = self.fp.read(775)
self.mode = "L" # FIXME: "P"
self.size = i16(s[0:2]), i16(s[2:4])
# transparency index
tindex = i16(s[5:7])
if tindex < 256:
self.info["transparent"] = tindex
self.palette = ImagePalette.raw("RGB", s[7:])
self.tile = [("raw", (0, 0) + self.size, 775, ("L", 0, -1))]
def _open(self):
# Header
s = self.fp.read(775)
self.mode = "L" # FIXME: "P"
self.size = i16(s[0:2]), i16(s[2:4])
# transparency index
tindex = i16(s[5:7])
if tindex < 256:
self.info["transparent"] = tindex
self.palette = ImagePalette.raw("RGB", s[7:])
self.tile = [("raw", (0,0)+self.size, 775, ("L", 0, -1))]
def _open(self):
if self.fp.read(8) != _MAGIC:
raise SyntaxError, "not a PNG file"
#
# Parse headers up to the first IDAT chunk
self.png = PngStream(self.fp)
while 1:
#
# get next chunk
cid, pos, len = self.png.read()
try:
s = self.png.call(cid, pos, len)
except EOFError:
break
except AttributeError:
if Image.DEBUG:
print cid, pos, len, "(unknown)"
s = ImageFile._safe_read(self.fp, len)
self.png.crc(cid, s)
#
# Copy relevant attributes from the PngStream. An alternative
# would be to let the PngStream class modify these attributes
# directly, but that introduces circular references which are
# difficult to break if things go wrong in the decoder...
# (believe me, I've tried ;-)
self.mode = self.png.im_mode
self.size = self.png.im_size
self.info = self.png.im_info
self.text = self.png.im_text # experimental
self.tile = self.png.im_tile
if self.png.im_palette:
rawmode, data = self.png.im_palette
self.palette = ImagePalette.raw(rawmode, data)
self.__idat = len # used by load_read()
def _open(self):
# HEAD
s = self.fp.read(128)
magic = i16(s[4:6])
if magic not in [0xAF11, 0xAF12]:
raise SyntaxError, "not an FLI/FLC file"
# image characteristics
self.mode = "P"
self.size = i16(s[8:10]), i16(s[10:12])
# animation speed
duration = i32(s[16:20])
if magic == 0xAF11:
duration = (duration * 1000) / 70
self.info["duration"] = duration
# look for palette
palette = map(lambda a: (a,a,a), range(256))
s = self.fp.read(16)
self.__offset = 128
if i16(s[4:6]) == 0xF100:
# prefix chunk; ignore it
self.__offset = self.__offset + i32(s)
s = self.fp.read(16)
if i16(s[4:6]) == 0xF1FA:
# look for palette chunk
s = self.fp.read(6)
if i16(s[4:6]) == 11:
self._palette(palette, 2)
elif i16(s[4:6]) == 4:
self._palette(palette, 0)
palette = map(lambda (r,g,b): chr(r)+chr(g)+chr(b), palette)
self.palette = ImagePalette.raw("RGB", string.join(palette, ""))
# set things up to decode first frame
self.frame = -1
self.__fp = self.fp
self.seek(0)
def _open(self):
# HEAD
s = self.fp.read(128)
magic = i16(s[4:6])
if magic not in [0xAF11, 0xAF12]:
raise SyntaxError, "not an FLI/FLC file"
# image characteristics
self.mode = "P"
self.size = i16(s[8:10]), i16(s[10:12])
# animation speed
duration = i32(s[16:20])
if magic == 0xAF11:
duration = (duration * 1000) / 70
self.info["duration"] = duration
# look for palette
palette = map(lambda a: (a, a, a), range(256))
s = self.fp.read(16)
self.__offset = 128
if i16(s[4:6]) == 0xF100:
# prefix chunk; ignore it
self.__offset = self.__offset + i32(s)
s = self.fp.read(16)
if i16(s[4:6]) == 0xF1FA:
# look for palette chunk
s = self.fp.read(6)
if i16(s[4:6]) == 11:
self._palette(palette, 2)
elif i16(s[4:6]) == 4:
self._palette(palette, 0)
palette = map(lambda (r, g, b): chr(r) + chr(g) + chr(b), palette)
self.palette = ImagePalette.raw("RGB", string.join(palette, ""))
# set things up to decode first frame
self.frame = -1
self.__fp = self.fp
self.seek(0)
def _open(self):
if self.fp.read(8) != _MAGIC:
raise SyntaxError, "not a PNG file"
#
# Parse headers up to the first IDAT chunk
self.png = PngStream(self.fp)
while 1:
#
# get next chunk
cid, pos, len = self.png.read()
try:
s = self.png.call(cid, pos, len)
except EOFError:
break
except AttributeError:
if Image.DEBUG:
print cid, pos, len, "(unknown)"
s = ImageFile._safe_read(self.fp, len)
self.png.crc(cid, s)
#
# Copy relevant attributes from the PngStream. An alternative
# would be to let the PngStream class modify these attributes
# directly, but that introduces circular references which are
# difficult to break if things go wrong in the decoder...
# (believe me, I've tried ;-)
self.mode = self.png.im_mode
self.size = self.png.im_size
self.info = self.png.im_info
self.text = self.png.im_text # experimental
self.tile = self.png.im_tile
if self.png.im_palette:
rawmode, data = self.png.im_palette
self.palette = ImagePalette.raw(rawmode, data)
self.__idat = len # used by load_read()
def _open(self):
# HEAD
s = self.fp.read(32)
if i32(s) != 0x59a66a95:
raise SyntaxError, "not an SUN raster file"
offset = 32
self.size = i32(s[4:8]), i32(s[8:12])
depth = i32(s[12:16])
if depth == 1:
self.mode, rawmode = "1", "1;I"
elif depth == 8:
self.mode = rawmode = "L"
elif depth == 24:
self.mode, rawmode = "RGB", "BGR"
else:
raise SyntaxError, "unsupported mode"
compression = i32(s[20:24])
if i32(s[24:28]) != 0:
length = i32(s[28:32])
offset = offset + length
self.palette = ImagePalette.raw("RGB;L", self.fp.read(length))
if self.mode == "L":
self.mode = rawmode = "P"
stride = (((self.size[0] * depth + 7) / 8) + 3) & (~3)
if compression == 1:
self.tile = [("raw", (0, 0) + self.size, offset, (rawmode, stride))
]
elif compression == 2:
self.tile = [("sun_rle", (0, 0) + self.size, offset, rawmode)]
def _open(self):
# HEAD
s = self.fp.read(32)
if i32(s) != 0x59a66a95:
raise SyntaxError, "not an SUN raster file"
offset = 32
self.size = i32(s[4:8]), i32(s[8:12])
depth = i32(s[12:16])
if depth == 1:
self.mode, rawmode = "1", "1;I"
elif depth == 8:
self.mode = rawmode = "L"
elif depth == 24:
self.mode, rawmode = "RGB", "BGR"
else:
raise SyntaxError, "unsupported mode"
compression = i32(s[20:24])
if i32(s[24:28]) != 0:
length = i32(s[28:32])
offset = offset + length
self.palette = ImagePalette.raw("RGB;L", self.fp.read(length))
if self.mode == "L":
self.mode = rawmode = "P"
stride = (((self.size[0] * depth + 7) / 8) + 3) & (~3)
if compression == 1:
self.tile = [("raw", (0,0)+self.size, offset, (rawmode, stride))]
elif compression == 2:
self.tile = [("sun_rle", (0,0)+self.size, offset, rawmode)]
def _open(self):
if not _accept(self.fp.read(9)):
raise SyntaxError, "not an XPM file"
# skip forward to next string
while 1:
s = self.fp.readline()
if not s:
raise SyntaxError, "broken XPM file"
m = xpm_head.match(s)
if m:
break
self.size = int(m.group(1)), int(m.group(2))
pal = int(m.group(3))
bpp = int(m.group(4))
if pal > 256 or bpp != 1:
raise ValueError, "cannot read this XPM file"
#
# load palette description
palette = ["\0\0\0"] * 256
for i in range(pal):
s = self.fp.readline()
if s[-2:] == '\r\n':
s = s[:-2]
elif s[-1:] in '\r\n':
s = s[:-1]
c = ord(s[1])
s = string.split(s[2:-2])
for i in range(0, len(s), 2):
if s[i] == "c":
# process colour key
rgb = s[i+1]
if rgb == "None":
self.info["transparency"] = c
elif rgb[0] == "#":
# FIXME: handle colour names (see ImagePalette.py)
rgb = string.atoi(rgb[1:], 16)
palette[c] = chr((rgb >> 16) & 255) +\
chr((rgb >> 8) & 255) +\
chr(rgb & 255)
else:
# unknown colour
raise ValueError, "cannot read this XPM file"
break
else:
# missing colour key
raise ValueError, "cannot read this XPM file"
self.mode = "P"
self.palette = ImagePalette.raw("RGB", string.join(palette, ""))
self.tile = [("raw", (0, 0)+self.size, self.fp.tell(), ("P", 0, 1))]
def _open(self):
# process header
s = self.fp.read(18)
id = ord(s[0])
colormaptype = ord(s[1])
imagetype = ord(s[2])
depth = ord(s[16])
flags = ord(s[17])
self.size = i16(s[12:]), i16(s[14:])
# validate header fields
if id != 0 or colormaptype not in (0, 1) or\
self.size[0] <= 0 or self.size[1] <= 0 or\
depth not in (1, 8, 16, 24, 32):
raise SyntaxError, "not a TGA file"
# image mode
if imagetype in (3, 11):
self.mode = "L"
if depth == 1:
self.mode = "1" # ???
elif imagetype in (1, 9):
self.mode = "P"
elif imagetype in (2, 10):
self.mode = "RGB"
if depth == 32:
self.mode = "RGBA"
else:
raise SyntaxError, "unknown TGA mode"
# orientation
orientation = flags & 0x30
if orientation == 0x20:
orientation = 1
elif not orientation:
orientation = -1
else:
raise SyntaxError, "unknown TGA orientation"
self.info["orientation"] = orientation
if imagetype & 8:
self.info["compression"] = "tga_rle"
if colormaptype:
# read palette
start, size, mapdepth = i16(s[3:]), i16(s[5:]), i16(s[7:])
if mapdepth == 16:
self.palette = ImagePalette.raw(
"BGR;16", "\0" * 2 * start + self.fp.read(2 * size))
elif mapdepth == 24:
self.palette = ImagePalette.raw(
"BGR", "\0" * 3 * start + self.fp.read(3 * size))
elif mapdepth == 32:
self.palette = ImagePalette.raw(
"BGRA", "\0" * 4 * start + self.fp.read(4 * size))
# setup tile descriptor
try:
rawmode = MODES[(imagetype & 7, depth)]
if imagetype & 8:
# compressed
self.tile = [("tga_rle", (0, 0) + self.size, self.fp.tell(),
(rawmode, orientation, depth))]
else:
self.tile = [("raw", (0, 0) + self.size, self.fp.tell(),
(rawmode, 0, orientation))]
except KeyError:
pass # cannot decode
def _bitmap(self, header = 0, offset = 0):
if header:
self.fp.seek(header)
read = self.fp.read
# CORE/INFO
s = read(4)
s = s + ImageFile._safe_read(self.fp, i32(s)-4)
if len(s) == 12:
# OS/2 1.0 CORE
bits = i16(s[10:])
self.size = i16(s[4:]), i16(s[6:])
compression = 0
lutsize = 3
colors = 0
direction = -1
elif len(s) in [40, 64]:
# WIN 3.1 or OS/2 2.0 INFO
bits = i16(s[14:])
self.size = i32(s[4:]), i32(s[8:])
compression = i32(s[16:])
lutsize = 4
colors = i32(s[32:])
direction = -1
if s[11] == '\xff':
# upside-down storage
self.size = self.size[0], 2**32 - self.size[1]
direction = 0
else:
raise IOError("Unsupported BMP header type (%d)" % len(s))
if not colors:
colors = 1 << bits
# MODE
try:
self.mode, rawmode = BIT2MODE[bits]
except KeyError:
raise IOError("Unsupported BMP pixel depth (%d)" % bits)
if compression == 3:
# BI_BITFIELDS compression
mask = i32(read(4)), i32(read(4)), i32(read(4))
if bits == 32 and mask == (0xff0000, 0x00ff00, 0x0000ff):
rawmode = "BGRX"
elif bits == 16 and mask == (0x00f800, 0x0007e0, 0x00001f):
rawmode = "BGR;16"
elif bits == 16 and mask == (0x007c00, 0x0003e0, 0x00001f):
rawmode = "BGR;15"
else:
# print bits, map(hex, mask)
raise IOError("Unsupported BMP bitfields layout")
elif compression != 0:
raise IOError("Unsupported BMP compression (%d)" % compression)
# LUT
if self.mode == "P":
palette = []
greyscale = 1
if colors == 2:
indices = (0, 255)
else:
indices = range(colors)
for i in indices:
rgb = read(lutsize)[:3]
if rgb != chr(i)*3:
greyscale = 0
palette.append(rgb)
if greyscale:
if colors == 2:
self.mode = rawmode = "1"
else:
self.mode = rawmode = "L"
else:
self.mode = "P"
self.palette = ImagePalette.raw(
"BGR", string.join(palette, "")
)
if not offset:
offset = self.fp.tell()
self.tile = [("raw",
(0, 0) + self.size,
offset,
(rawmode, ((self.size[0]*bits+31)>>3)&(~3), direction))]
self.info["compression"] = compression
def _open(self):
read = self.fp.read
#
# header
s = read(26)
if s[:4] != "8BPS" or i16(s[4:]) != 1:
raise SyntaxError, "not a PSD file"
psd_bits = i16(s[22:])
psd_channels = i16(s[12:])
psd_mode = i16(s[24:])
mode, channels = MODES[(psd_mode, psd_bits)]
if channels > psd_channels:
raise IOError, "not enough channels"
self.mode = mode
self.size = i32(s[18:]), i32(s[14:])
#
# color mode data
size = i32(read(4))
if size:
data = read(size)
if mode == "P" and size == 768:
self.palette = ImagePalette.raw("RGB;L", data)
#
# image resources
self.resources = []
size = i32(read(4))
if size:
# load resources
end = self.fp.tell() + size
while self.fp.tell() < end:
signature = read(4)
id = i16(read(2))
name = read(ord(read(1)))
if not (len(name) & 1):
read(1) # padding
data = read(i32(read(4)))
if len(data) & 1:
read(1) # padding
self.resources.append((id, name, data))
if id == 1039: # ICC profile
self.info["icc_profile"] = data
#
# layer and mask information
self.layers = []
size = i32(read(4))
if size:
end = self.fp.tell() + size
size = i32(read(4))
if size:
self.layers = _layerinfo(self.fp)
self.fp.seek(end)
#
# image descriptor
self.tile = _maketile(self.fp, mode, (0, 0) + self.size, channels)
# keep the file open
self._fp = self.fp
self.frame = 0
def _open(self):
read = self.fp.read
#
# header
s = read(26)
if s[:4] != "8BPS" or i16(s[4:]) != 1:
raise SyntaxError, "not a PSD file"
psd_bits = i16(s[22:])
psd_channels = i16(s[12:])
psd_mode = i16(s[24:])
mode, channels = MODES[(psd_mode, psd_bits)]
if channels > psd_channels:
raise IOError, "not enough channels"
self.mode = mode
self.size = i32(s[18:]), i32(s[14:])
#
# color mode data
size = i32(read(4))
if size:
data = read(size)
if mode == "P" and size == 768:
self.palette = ImagePalette.raw("RGB;L", data)
#
# image resources
self.resources = []
size = i32(read(4))
if size:
# load resources
end = self.fp.tell() + size
while self.fp.tell() < end:
signature = read(4)
id = i16(read(2))
name = read(ord(read(1)))
if not (len(name) & 1):
read(1) # padding
data = read(i32(read(4)))
if (len(data) & 1):
read(1) # padding
self.resources.append((id, name, data))
if id == 1039: # ICC profile
self.info["icc_profile"] = data
#
# layer and mask information
self.layers = []
size = i32(read(4))
if size:
end = self.fp.tell() + size
size = i32(read(4))
if size:
self.layers = _layerinfo(self.fp)
self.fp.seek(end)
#
# image descriptor
self.tile = _maketile(self.fp, mode, (0, 0) + self.size, channels)
# keep the file open
self._fp = self.fp
self.frame = 0
class ImImageFile(ImageFile.ImageFile):
format = "IM"
format_description = "IFUNC Image Memory"
def _open(self):
# Quick rejection: if there's not an LF among the first
# 100 bytes, this is (probably) not a text header.
if not "\n" in self.fp.read(100):
raise SyntaxError, "not an IM file"
self.fp.seek(0)
n = 0
# Default values
self.info[MODE] = "L"
self.info[SIZE] = (512, 512)
self.info[FRAMES] = 1
self.rawmode = "L"
while 1:
s = self.fp.read(1)
# Some versions of IFUNC uses \n\r instead of \r\n...
if s == "\r":
continue
if not s or s[0] == chr(0) or s[0] == chr(26):
break
# FIXME: this may read whole file if not a text file
s = s + self.fp.readline()
if len(s) > 100:
raise SyntaxError, "not an IM file"
if s[-2:] == '\r\n':
s = s[:-2]
elif s[-1:] == '\n':
s = s[:-1]
try:
m = split.match(s)
except re.error, v:
raise SyntaxError, "not an IM file"
if m:
k, v = m.group(1,2)
# Convert value as appropriate
if k in [FRAMES, SCALE, SIZE]:
v = string.replace(v, "*", ",")
v = tuple(map(number, string.split(v, ",")))
if len(v) == 1:
v = v[0]
elif k == MODE and OPEN.has_key(v):
v, self.rawmode = OPEN[v]
# Add to dictionary. Note that COMMENT tags are
# combined into a list of strings.
if k == COMMENT:
if self.info.has_key(k):
self.info[k].append(v)
else:
self.info[k] = [v]
else:
self.info[k] = v
if TAGS.has_key(k):
n = n + 1
else:
raise SyntaxError, "Syntax error in IM header: " + s
if not n:
raise SyntaxError, "Not an IM file"
# Basic attributes
self.size = self.info[SIZE]
self.mode = self.info[MODE]
# Skip forward to start of image data
while s and s[0] != chr(26):
s = self.fp.read(1)
if not s:
raise SyntaxError, "File truncated"
if self.info.has_key(LUT):
# convert lookup table to palette or lut attribute
palette = self.fp.read(768)
greyscale = 1 # greyscale palette
linear = 1 # linear greyscale palette
for i in range(256):
if palette[i] == palette[i+256] == palette[i+512]:
if palette[i] != chr(i):
linear = 0
else:
greyscale = 0
if self.mode == "L" or self.mode == "LA":
if greyscale:
if not linear:
self.lut = map(ord, palette[:256])
else:
if self.mode == "L":
self.mode = self.rawmode = "P"
elif self.mode == "LA":
self.mode = self.rawmode = "PA"
self.palette = ImagePalette.raw("RGB;L", palette)
elif self.mode == "RGB":
if not greyscale or not linear:
self.lut = map(ord, palette)
self.frame = 0
self.__offset = offs = self.fp.tell()
self.__fp = self.fp # FIXME: hack
if self.rawmode[:2] == "F;":
# ifunc95 formats
try:
# use bit decoder (if necessary)
bits = int(self.rawmode[2:])
if bits not in [8, 16, 32]:
self.tile = [("bit", (0,0)+self.size, offs,
(bits, 8, 3, 0, -1))]
return
except ValueError:
pass
if self.rawmode in ["RGB;T", "RYB;T"]:
# Old LabEye/3PC files. Would be very surprised if anyone
# ever stumbled upon such a file ;-)
size = self.size[0] * self.size[1]
self.tile = [("raw", (0,0)+self.size, offs, ("G", 0, -1)),
("raw", (0,0)+self.size, offs+size, ("R", 0, -1)),
("raw", (0,0)+self.size, offs+2*size, ("B", 0, -1))]
else:
# LabEye/IFUNC files
self.tile = [("raw", (0,0)+self.size, offs, (self.rawmode, 0, -1))]
def _bitmap(self, header=0, offset=0):
if header:
self.fp.seek(header)
read = self.fp.read
# CORE/INFO
s = read(4)
s = s + ImageFile._safe_read(self.fp, i32(s) - 4)
if len(s) == 12:
# OS/2 1.0 CORE
bits = i16(s[10:])
self.size = i16(s[4:]), i16(s[6:])
compression = 0
lutsize = 3
colors = 0
direction = -1
elif len(s) in [40, 64]:
# WIN 3.1 or OS/2 2.0 INFO
bits = i16(s[14:])
self.size = i32(s[4:]), i32(s[8:])
compression = i32(s[16:])
lutsize = 4
colors = i32(s[32:])
direction = -1
if s[11] == '\xff':
# upside-down storage
self.size = self.size[0], 2**32 - self.size[1]
direction = 0
else:
raise IOError("Unsupported BMP header type (%d)" % len(s))
if not colors:
colors = 1 << bits
# MODE
try:
self.mode, rawmode = BIT2MODE[bits]
except KeyError:
raise IOError("Unsupported BMP pixel depth (%d)" % bits)
if compression == 3:
# BI_BITFIELDS compression
mask = i32(read(4)), i32(read(4)), i32(read(4))
if bits == 32 and mask == (0xff0000, 0x00ff00, 0x0000ff):
rawmode = "BGRX"
elif bits == 16 and mask == (0x00f800, 0x0007e0, 0x00001f):
rawmode = "BGR;16"
elif bits == 16 and mask == (0x007c00, 0x0003e0, 0x00001f):
rawmode = "BGR;15"
else:
# print bits, map(hex, mask)
raise IOError("Unsupported BMP bitfields layout")
elif compression != 0:
raise IOError("Unsupported BMP compression (%d)" % compression)
# LUT
if self.mode == "P":
palette = []
greyscale = 1
if colors == 2:
indices = (0, 255)
else:
indices = range(colors)
for i in indices:
rgb = read(lutsize)[:3]
if rgb != chr(i) * 3:
greyscale = 0
palette.append(rgb)
if greyscale:
if colors == 2:
self.mode = rawmode = "1"
else:
self.mode = rawmode = "L"
else:
self.mode = "P"
self.palette = ImagePalette.raw("BGR",
string.join(palette, ""))
if not offset:
offset = self.fp.tell()
self.tile = [("raw", (0, 0) + self.size, offset,
(rawmode, ((self.size[0] * bits + 31) >> 3) & (~3),
direction))]
self.info["compression"] = compression
def _setup(self):
"Setup this image object based on current tags"
if self.tag.has_key(0xBC01):
raise IOError, "Windows Media Photo files not yet supported"
getscalar = self.tag.getscalar
# extract relevant tags
self._compression = COMPRESSION_INFO[getscalar(COMPRESSION, 1)]
self._planar_configuration = getscalar(PLANAR_CONFIGURATION, 1)
# photometric is a required tag, but not everyone is reading
# the specification
photo = getscalar(PHOTOMETRIC_INTERPRETATION, 0)
fillorder = getscalar(FILLORDER, 1)
if Image.DEBUG:
print "*** Summary ***"
print "- compression:", self._compression
print "- photometric_interpretation:", photo
print "- planar_configuration:", self._planar_configuration
print "- fill_order:", fillorder
# size
xsize = getscalar(IMAGEWIDTH)
ysize = getscalar(IMAGELENGTH)
self.size = xsize, ysize
if Image.DEBUG:
print "- size:", self.size
format = getscalar(SAMPLEFORMAT, 1)
# mode: check photometric interpretation and bits per pixel
key = (
self.tag.prefix, photo, format, fillorder,
self.tag.get(BITSPERSAMPLE, (1,)),
self.tag.get(EXTRASAMPLES, ())
)
if Image.DEBUG:
print "format key:", key
try:
self.mode, rawmode = OPEN_INFO[key]
except KeyError:
if Image.DEBUG:
print "- unsupported format"
raise SyntaxError, "unknown pixel mode"
if Image.DEBUG:
print "- raw mode:", rawmode
print "- pil mode:", self.mode
self.info["compression"] = self._compression
xres = getscalar(X_RESOLUTION, (1, 1))
yres = getscalar(Y_RESOLUTION, (1, 1))
if xres and yres:
xres = xres[0] / (xres[1] or 1)
yres = yres[0] / (yres[1] or 1)
resunit = getscalar(RESOLUTION_UNIT, 1)
if resunit == 2: # dots per inch
self.info["dpi"] = xres, yres
elif resunit == 3: # dots per centimeter. convert to dpi
self.info["dpi"] = xres * 2.54, yres * 2.54
else: # No absolute unit of measurement
self.info["resolution"] = xres, yres
# build tile descriptors
x = y = l = 0
self.tile = []
if self.tag.has_key(STRIPOFFSETS):
# striped image
h = getscalar(ROWSPERSTRIP, ysize)
w = self.size[0]
a = None
for o in self.tag[STRIPOFFSETS]:
if not a:
a = self._decoder(rawmode, l)
self.tile.append(
(self._compression,
(0, min(y, ysize), w, min(y+h, ysize)),
o, a))
y = y + h
if y >= self.size[1]:
x = y = 0
l = l + 1
a = None
elif self.tag.has_key(TILEOFFSETS):
# tiled image
w = getscalar(322)
h = getscalar(323)
a = None
for o in self.tag[TILEOFFSETS]:
if not a:
a = self._decoder(rawmode, l)
# FIXME: this doesn't work if the image size
# is not a multiple of the tile size...
self.tile.append(
(self._compression,
(x, y, x+w, y+h),
o, a))
x = x + w
if x >= self.size[0]:
x, y = 0, y + h
if y >= self.size[1]:
x = y = 0
l = l + 1
a = None
else:
if Image.DEBUG:
print "- unsupported data organization"
raise SyntaxError("unknown data organization")
# fixup palette descriptor
if self.mode == "P":
palette = map(lambda a: chr(a / 256), self.tag[COLORMAP])
self.palette = ImagePalette.raw("RGB;L", string.join(palette, ""))
def _open(self):
# process header
s = self.fp.read(18)
id = ord(s[0])
colormaptype = ord(s[1])
imagetype = ord(s[2])
depth = ord(s[16])
flags = ord(s[17])
self.size = i16(s[12:]), i16(s[14:])
# validate header fields
if id != 0 or colormaptype not in (0, 1) or\
self.size[0] <= 0 or self.size[1] <= 0 or\
depth not in (1, 8, 16, 24, 32):
raise SyntaxError, "not a TGA file"
# image mode
if imagetype in (3, 11):
self.mode = "L"
if depth == 1:
self.mode = "1" # ???
elif imagetype in (1, 9):
self.mode = "P"
elif imagetype in (2, 10):
self.mode = "RGB"
if depth == 32:
self.mode = "RGBA"
else:
raise SyntaxError, "unknown TGA mode"
# orientation
orientation = flags & 0x30
if orientation == 0x20:
orientation = 1
elif not orientation:
orientation = -1
else:
raise SyntaxError, "unknown TGA orientation"
self.info["orientation"] = orientation
if imagetype & 8:
self.info["compression"] = "tga_rle"
if colormaptype:
# read palette
start, size, mapdepth = i16(s[3:]), i16(s[5:]), i16(s[7:])
if mapdepth == 16:
self.palette = ImagePalette.raw("BGR;16",
"\0"*2*start + self.fp.read(2*size))
elif mapdepth == 24:
self.palette = ImagePalette.raw("BGR",
"\0"*3*start + self.fp.read(3*size))
elif mapdepth == 32:
self.palette = ImagePalette.raw("BGRA",
"\0"*4*start + self.fp.read(4*size))
# setup tile descriptor
try:
rawmode = MODES[(imagetype&7, depth)]
if imagetype & 8:
# compressed
self.tile = [("tga_rle", (0, 0)+self.size,
self.fp.tell(), (rawmode, orientation, depth))]
else:
self.tile = [("raw", (0, 0)+self.size,
self.fp.tell(), (rawmode, 0, orientation))]
except KeyError:
pass # cannot decode
def seek(self, frame):
if frame == 0:
# rewind
self.__offset = 0
self.dispose = None
self.__frame = -1
self.__fp.seek(self.__rewind)
if frame != self.__frame + 1:
raise ValueError, "cannot seek to frame %d" % frame
self.__frame = frame
self.tile = []
self.fp = self.__fp
if self.__offset:
# backup to last frame
self.fp.seek(self.__offset)
while self.data():
pass
self.__offset = 0
if self.dispose:
self.im = self.dispose
self.dispose = None
self.palette = self.global_palette
while 1:
s = self.fp.read(1)
if not s or s == ";":
break
elif s == "!":
#
# extensions
#
s = self.fp.read(1)
block = self.data()
if ord(s) == 249:
#
# graphic control extension
#
flags = ord(block[0])
if flags & 1:
self.info["transparency"] = ord(block[3])
self.info["duration"] = i16(block[1:3]) * 10
try:
# disposal methods
if flags & 8:
# replace with background colour
self.dispose = Image.core.fill("P", self.size,
self.info["background"])
elif flags & 16:
# replace with previous contents
self.dispose = self.im.copy()
except (AttributeError, KeyError):
pass
elif ord(s) == 255:
#
# application extension
#
self.info["extension"] = block, self.fp.tell()
if block[:11] == "NETSCAPE2.0":
block = self.data()
if len(block) >= 3 and ord(block[0]) == 1:
self.info["loop"] = i16(block[1:3])
while self.data():
pass
elif s == ",":
#
# local image
#
s = self.fp.read(9)
# extent
x0, y0 = i16(s[0:]), i16(s[2:])
x1, y1 = x0 + i16(s[4:]), y0 + i16(s[6:])
flags = ord(s[8])
interlace = (flags & 64) != 0
if flags & 128:
bits = (flags & 7) + 1
self.palette =\
ImagePalette.raw("RGB", self.fp.read(3<<bits))
# image data
bits = ord(self.fp.read(1))
self.__offset = self.fp.tell()
self.tile = [("gif",
(x0, y0, x1, y1),
self.__offset,
(bits, interlace))]
break
else:
pass
# raise IOError, "illegal GIF tag `%x`" % ord(s)
if not self.tile:
# self.__fp = None
raise EOFError, "no more images in GIF file"
self.mode = "L"
if self.palette:
self.mode = "P"
def _open(self):
if not _accept(self.fp.read(9)):
raise SyntaxError, "not an XPM file"
# skip forward to next string
while 1:
s = self.fp.readline()
if not s:
raise SyntaxError, "broken XPM file"
m = xpm_head.match(s)
if m:
break
self.size = int(m.group(1)), int(m.group(2))
pal = int(m.group(3))
bpp = int(m.group(4))
if pal > 256 or bpp != 1:
raise ValueError, "cannot read this XPM file"
#
# load palette description
palette = ["\0\0\0"] * 256
for i in range(pal):
s = self.fp.readline()
if s[-2:] == '\r\n':
s = s[:-2]
elif s[-1:] in '\r\n':
s = s[:-1]
c = ord(s[1])
s = string.split(s[2:-2])
for i in range(0, len(s), 2):
if s[i] == "c":
# process colour key
rgb = s[i + 1]
if rgb == "None":
self.info["transparency"] = c
elif rgb[0] == "#":
# FIXME: handle colour names (see ImagePalette.py)
rgb = string.atoi(rgb[1:], 16)
palette[c] = chr((rgb >> 16) & 255) +\
chr((rgb >> 8) & 255) +\
chr(rgb & 255)
else:
# unknown colour
raise ValueError, "cannot read this XPM file"
break
else:
# missing colour key
raise ValueError, "cannot read this XPM file"
self.mode = "P"
self.palette = ImagePalette.raw("RGB", string.join(palette, ""))
self.tile = [("raw", (0, 0) + self.size, self.fp.tell(), ("P", 0, 1))]
