def saveGif(self, filename):
with open(filename, 'wb') as f:
#TODO: check if file is writable?
#Write the header
f.write(self.headerBytes())
#Write the screen descriptor
f.write(self.screenDescriptorBytes())
#write global colour palette, if any
if self.globalPalette:
assert(len(self.globalPalette) == 768)
f.write(self.globalPalette)
if len(self.Frames)>1:
f.write(self.loopControlBytes())
for GCE, ID, img in self.Frames:
if len(self.Frames)>1:
f.write(GCE.toBytes())
f.write(ID.toBytes())
#convert to new image.
imOut = self.convertRGBtoIndexed(img, self.globalPalette)
imOut.encoderconfig = (8, False) #no interlace.
f.write(b'\x08')
ImageFile._save(imOut, f, [("gif", (0,0)+imOut.size, 0, RAWMODE[imOut.mode])])
f.write(b"\0") #end of image data.
#Write end of file (0x3B)
f.write(b';')
def _save(im, fp, filename, check=0):
try:
type, rawmode = SAVE[im.mode]
except KeyError:
raise ValueError("Cannot save %s images as IM" % im.mode)
try:
frames = im.encoderinfo["frames"]
except KeyError:
frames = 1
if check:
return check
fp.write(("Image type: %s image\r\n" % type).encode('ascii'))
if filename:
fp.write(("Name: %s\r\n" % filename).encode('ascii'))
fp.write(("Image size (x*y): %d*%d\r\n" % im.size).encode('ascii'))
fp.write(("File size (no of images): %d\r\n" % frames).encode('ascii'))
if im.mode == "P":
fp.write(b"Lut: 1\r\n")
fp.write(b"\000" * (511-fp.tell()) + b"\032")
if im.mode == "P":
fp.write(im.im.getpalette("RGB", "RGB;L")) # 768 bytes
ImageFile._save(im, fp, [("raw", (0,0)+im.size, 0, (rawmode, 0, -1))])
def _save(im, fp, filename):
if im.mode == "1":
rawmode, head = "1;I", b"P4"
elif im.mode == "L":
rawmode, head = "L", b"P5"
elif im.mode == "I":
if im.getextrema()[1] < 2 ** 16:
rawmode, head = "I;16B", b"P5"
else:
rawmode, head = "I;32B", b"P5"
elif im.mode == "RGB":
rawmode, head = "RGB", b"P6"
elif im.mode == "RGBA":
rawmode, head = "RGB", b"P6"
else:
raise IOError("cannot write mode %s as PPM" % im.mode)
fp.write(head + ("\n%d %d\n" % im.size).encode("ascii"))
if head == b"P6":
fp.write(b"255\n")
if head == b"P5":
if rawmode == "L":
fp.write(b"255\n")
elif rawmode == "I;16B":
fp.write(b"65535\n")
elif rawmode == "I;32B":
fp.write(b"2147483648\n")
ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, 0, 1))])
def _save(im, fp, filename):
if im.mode != "1":
raise IOError("cannot write mode %s as MSP" % im.mode)
# create MSP header
header = [0] * 16
header[0], header[1] = i16(b"Da"), i16(b"nM") # version 1
header[2], header[3] = im.size
header[4], header[5] = 1, 1
header[6], header[7] = 1, 1
header[8], header[9] = im.size
checksum = 0
for h in header:
checksum = checksum ^ h
header[12] = checksum # FIXME: is this the right field?
# header
for h in header:
fp.write(o16(h))
# image body
ImageFile._save(im, fp, [("raw", (0, 0)+im.size, 32, ("1", 0, 1))])
def getdata(im, offset = (0, 0), **params):
"""Return a list of strings representing this image.
The first string is a local image header, the rest contains
encoded image data."""
class collector:
data = []
def write(self, data):
self.data.append(data)
im.load() # make sure raster data is available
fp = collector()
try:
im.encoderinfo = params
# local image header
fp.write(b"," +
o16(offset[0]) + # offset
o16(offset[1]) +
o16(im.size[0]) + # size
o16(im.size[1]) +
o8(0) + # flags
o8(8)) # bits
ImageFile._save(im, fp, [("gif", (0,0)+im.size, 0, RAWMODE[im.mode])])
fp.write(b"\0") # end of image data
finally:
del im.encoderinfo
return fp.data
def _save(im, fp, filename):
try:
rawmode = RAWMODE[im.mode]
except KeyError:
raise IOError("cannot write mode %s as JPEG" % im.mode)
info = im.encoderinfo
dpi = info.get("dpi", (0, 0))
# get keyword arguments
im.encoderconfig = (
info.get("quality", 0),
# "progressive" is the official name, but older documentation
# says "progression"
# FIXME: issue a warning if the wrong form is used (post-1.1.5)
info.has_key("progressive") or info.has_key("progression"),
info.get("smooth", 0),
info.has_key("optimize"),
info.get("streamtype", 0),
dpi[0], dpi[1]
)
if im.mode == "CMYK":
# invert it so it's handled correctly in Photoshop/etc. - Kevin Cazabon.
im = ImageChops.invert(im)
ImageFile._save(im, fp, [("jpeg", (0,0)+im.size, 0, rawmode)])
def getdata(im, offset=(0, 0), **params):
"""Return a list of strings representing this image.
The first string is a local image header, the rest contains
encoded image data."""
class Collector(object):
data = []
def write(self, data):
self.data.append(data)
im.load() # make sure raster data is available
fp = Collector()
try:
im.encoderinfo = params
# local image header
_get_local_header(fp, im, offset, 0)
ImageFile._save(im, fp, [("gif", (0, 0)+im.size, 0, RAWMODE[im.mode])])
fp.write(b"\0") # end of image data
finally:
del im.encoderinfo
return fp.data
def encode_image(img):
img = img.convert('P', palette=Image.ADAPTIVE, colors=256)
palbytes = img.palette.palette
# assert len(img.palette) in (2, 4, 8, 0x10, 0x20, 0x40, 0x80, 0x100)
imio = io.BytesIO()
ImageFile._save(img, imio, [("gif", (0, 0)+img.size, 0, 'P')])
return (
# GCE
b'\x21' # extension block
+ b'\xf9' # graphic control extension
+ b'\x04' # block size
+ b'\x00' # flags
+ b'\x00\x00' # frame delay
+ b'\x00' # transparent color index
+ b'\x00' # block terminator
# Image headers
+ b'\x2c' # image block
+ b'\x00\x00' # image x
+ b'\x00\x00' # image y
+ struct.pack('<H', img.width) # image width
+ struct.pack('<H', img.height) # image height
+ bytes((0x80 | int(math.log(len(palbytes)//3, 2.0))-1,)) # flags (local palette and palette size)
# Palette
+ palbytes
# LZW code size
+ b'\x08'
# Image data. We're using pillow here because I was too lazy finding a suitable LZW encoder.
+ imio.getbuffer()
# End of image data
+ b'\x00'
)
def _save(im, fp, filename, eps=1):
"""EPS Writer for the Python Imaging Library."""
#
# make sure image data is available
im.load()
#
# determine postscript image mode
if im.mode == "L":
operator = (8, 1, "image")
elif im.mode == "RGB":
operator = (8, 3, "false 3 colorimage")
elif im.mode == "CMYK":
operator = (8, 4, "false 4 colorimage")
else:
raise ValueError("image mode is not supported")
class NoCloseStream:
def __init__(self, fp):
self.fp = fp
def __getattr__(self, name):
return getattr(self.fp, name)
def close(self):
pass
base_fp = fp
fp = io.TextIOWrapper(NoCloseStream(fp), encoding='latin-1')
if eps:
#
# write EPS header
fp.write("%!PS-Adobe-3.0 EPSF-3.0\n")
fp.write("%%Creator: PIL 0.1 EpsEncode\n")
#fp.write("%%CreationDate: %s"...)
fp.write("%%%%BoundingBox: 0 0 %d %d\n" % im.size)
fp.write("%%Pages: 1\n")
fp.write("%%EndComments\n")
fp.write("%%Page: 1 1\n")
fp.write("%%ImageData: %d %d " % im.size)
fp.write("%d %d 0 1 1 \"%s\"\n" % operator)
#
# image header
fp.write("gsave\n")
fp.write("10 dict begin\n")
fp.write("/buf %d string def\n" % (im.size[0] * operator[1]))
fp.write("%d %d scale\n" % im.size)
fp.write("%d %d 8\n" % im.size) # <= bits
fp.write("[%d 0 0 -%d 0 %d]\n" % (im.size[0], im.size[1], im.size[1]))
fp.write("{ currentfile buf readhexstring pop } bind\n")
fp.write(operator[2] + "\n")
fp.flush()
ImageFile._save(im, base_fp, [("eps", (0,0)+im.size, 0, None)])
fp.write("\n%%%%EndBinary\n")
fp.write("grestore end\n")
fp.flush()
def _save(im, fp, filename, check=0):
try:
rawmode, bits, colors = SAVE[im.mode]
except KeyError:
raise IOError("cannot write mode %s as BMP" % im.mode)
if check:
return check
info = im.encoderinfo
dpi = info.get("dpi", (96, 96))
# 1 meter == 39.3701 inches
ppm = tuple(map(lambda x: int(x * 39.3701), dpi))
stride = ((im.size[0] * bits + 7) // 8 + 3) & (~3)
header = 40 # or 64 for OS/2 version 2
offset = 14 + header + colors * 4
image = stride * im.size[1]
# bitmap header
fp.write(
b"BM" + o32(offset + image) + o32(0) + o32(offset) # file type (magic) # file size # reserved
) # image data offset
# bitmap info header
fp.write(
o32(header)
+ o32(im.size[0]) # info header size
+ o32(im.size[1]) # width
+ o16(1) # height
+ o16(bits) # planes
+ o32(0) # depth
+ o32(image) # compression (0=uncompressed)
+ o32(ppm[0]) # size of bitmap
+ o32(ppm[1])
+ o32(colors) # resolution
+ o32(colors) # colors used
) # colors important
fp.write(b"\0" * (header - 40)) # padding (for OS/2 format)
if im.mode == "1":
for i in (0, 255):
fp.write(o8(i) * 4)
elif im.mode == "L":
for i in range(256):
fp.write(o8(i) * 4)
elif im.mode == "P":
fp.write(im.im.getpalette("RGB", "BGRX"))
ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, stride, -1))])
def _save(im, fp, filename):
if _imaging_gif:
# call external driver
try:
_imaging_gif.save(im, fp, filename)
return
except IOError:
pass # write uncompressed file
if im.mode in RAWMODE:
im_out = im
else:
# convert on the fly (EXPERIMENTAL -- I'm not sure PIL
# should automatically convert images on save...)
if Image.getmodebase(im.mode) == "RGB":
palette_size = 256
if im.palette:
palette_size = len(im.palette.getdata()[1]) // 3
im_out = im.convert("P", palette=1, colors=palette_size)
else:
im_out = im.convert("L")
# header
try:
palette = im.encoderinfo["palette"]
except KeyError:
palette = None
im.encoderinfo["optimize"] = im.encoderinfo.get("optimize", True)
header, used_palette_colors = getheader(im_out, palette, im.encoderinfo)
for s in header:
fp.write(s)
flags = 0
if get_interlace(im):
flags = flags | 64
# local image header
get_local_header(fp, im, (0, 0), flags)
im_out.encoderconfig = (8, get_interlace(im))
ImageFile._save(im_out, fp, [("gif", (0, 0)+im.size, 0,
RAWMODE[im_out.mode])])
fp.write(b"\0") # end of image data
fp.write(b";") # end of file
try:
fp.flush()
except:
pass
def _save(im, fp, filename, check=0):
try:
version, bits, planes, rawmode = SAVE[im.mode]
except KeyError:
raise ValueError("Cannot save %s images as PCX" % im.mode)
if check:
return check
# bytes per plane
stride = (im.size[0] * bits + 7) // 8
# stride should be even
stride += stride % 2
# Stride needs to be kept in sync with the PcxEncode.c version.
# Ideally it should be passed in in the state, but the bytes value
# gets overwritten.
if Image.DEBUG:
print ("PcxImagePlugin._save: xwidth: %d, bits: %d, stride: %d" % (
im.size[0], bits, stride))
# under windows, we could determine the current screen size with
# "Image.core.display_mode()[1]", but I think that's overkill...
screen = im.size
dpi = 100, 100
# PCX header
fp.write(
o8(10) + o8(version) + o8(1) + o8(bits) + o16(0) +
o16(0) + o16(im.size[0]-1) + o16(im.size[1]-1) + o16(dpi[0]) +
o16(dpi[1]) + b"\0"*24 + b"\xFF"*24 + b"\0" + o8(planes) +
o16(stride) + o16(1) + o16(screen[0]) + o16(screen[1]) +
b"\0"*54
)
assert fp.tell() == 128
ImageFile._save(im, fp, [("pcx", (0,0)+im.size, 0,
(rawmode, bits*planes))])
if im.mode == "P":
# colour palette
fp.write(o8(12))
fp.write(im.im.getpalette("RGB", "RGB")) # 768 bytes
elif im.mode == "L":
# greyscale palette
fp.write(o8(12))
for i in range(256):
fp.write(o8(i)*3)
def _save(im, fp, filename):
try:
rawmode = RAWMODE[im.mode]
except KeyError:
raise IOError("cannot write mode %s as JPEG" % im.mode)
info = im.encoderinfo
dpi = info.get("dpi", (0, 0))
subsampling = info.get("subsampling", -1)
if subsampling == "4:4:4":
subsampling = 0
elif subsampling == "4:2:2":
subsampling = 1
elif subsampling == "4:1:1":
subsampling = 2
extra = ""
icc_profile = info.get("icc_profile")
if icc_profile:
ICC_OVERHEAD_LEN = 14
MAX_BYTES_IN_MARKER = 65533
MAX_DATA_BYTES_IN_MARKER = MAX_BYTES_IN_MARKER - ICC_OVERHEAD_LEN
markers = []
while icc_profile:
markers.append(icc_profile[:MAX_DATA_BYTES_IN_MARKER])
icc_profile = icc_profile[MAX_DATA_BYTES_IN_MARKER:]
i = 1
for marker in markers:
size = struct.pack(">H", 2 + ICC_OVERHEAD_LEN + len(marker))
extra = extra + ("\xFF\xE2" + size + "ICC_PROFILE\0" + chr(i) + chr(len(markers)) + marker)
i = i + 1
# get keyword arguments
im.encoderconfig = (
info.get("quality", 0),
# "progressive" is the official name, but older documentation
# says "progression"
# FIXME: issue a warning if the wrong form is used (post-1.1.7)
info.has_key("progressive") or info.has_key("progression"),
info.get("smooth", 0),
info.has_key("optimize"),
info.get("streamtype", 0),
dpi[0], dpi[1],
subsampling,
extra,
)
ImageFile._save(im, fp, [("jpeg", (0,0)+im.size, 0, rawmode)])
def _save(im, fp, filename):
if im.mode[0] != "F":
im = im.convert('F')
hdr = makeSpiderHeader(im)
if len(hdr) < 256:
raise IOError("Error creating Spider header")
# write the SPIDER header
fp.writelines(hdr)
rawmode = "F;32NF" # 32-bit native floating point
ImageFile._save(im, fp, [("raw", (0, 0)+im.size, 0, (rawmode, 0, 1))])
def _save(im, fp, filename):
if im.mode == "1":
rawmode, head = "1;I", b"P4"
elif im.mode == "L":
rawmode, head = "L", b"P5"
elif im.mode == "RGB":
rawmode, head = "RGB", b"P6"
elif im.mode == "RGBA":
rawmode, head = "RGB", b"P6"
else:
raise IOError("cannot write mode %s as PPM" % im.mode)
fp.write(head + ("\n%d %d\n" % im.size).encode('ascii'))
if head != b"P4":
fp.write(b"255\n")
ImageFile._save(im, fp, [("raw", (0,0)+im.size, 0, (rawmode, 0, 1))])
def _save(im, fp, filename):
if im.mode != "1":
raise IOError("cannot write mode %s as XBM" % im.mode)
fp.write(("#define im_width %d\n" % im.size[0]).encode('ascii'))
fp.write(("#define im_height %d\n" % im.size[1]).encode('ascii'))
hotspot = im.encoderinfo.get("hotspot")
if hotspot:
fp.write(("#define im_x_hot %d\n" % hotspot[0]).encode('ascii'))
fp.write(("#define im_y_hot %d\n" % hotspot[1]).encode('ascii'))
fp.write(b"static char im_bits[] = {\n")
ImageFile._save(im, fp, [("xbm", (0, 0) + im.size, 0, None)])
fp.write(b"};\n")
def _save(im, fp, filename, check=0):
try:
rawmode, bits, colors = SAVE[im.mode]
except KeyError:
raise IOError("cannot write mode %s as BMP" % im.mode)
if check:
return check
stride = ((im.size[0]*bits+7)//8+3)&(~3)
header = 40 # or 64 for OS/2 version 2
offset = 14 + header + colors * 4
image = stride * im.size[1]
# bitmap header
fp.write(b"BM" + # file type (magic)
o32(offset+image) + # file size
o32(0) + # reserved
o32(offset)) # image data offset
# bitmap info header
fp.write(o32(header) + # info header size
o32(im.size[0]) + # width
o32(im.size[1]) + # height
o16(1) + # planes
o16(bits) + # depth
o32(0) + # compression (0=uncompressed)
o32(image) + # size of bitmap
o32(1) + o32(1) + # resolution
o32(colors) + # colors used
o32(colors)) # colors important
fp.write(b"\0" * (header - 40)) # padding (for OS/2 format)
if im.mode == "1":
for i in (0, 255):
fp.write(o8(i) * 4)
elif im.mode == "L":
for i in range(256):
fp.write(o8(i) * 4)
elif im.mode == "P":
fp.write(im.im.getpalette("RGB", "BGRX"))
ImageFile._save(im, fp, [("raw", (0,0)+im.size, 0, (rawmode, stride, -1))])
def _save(im, fp, filename, check=0):
# check if im.mode is compatible with MRC (see Bmp...)
if check:
return check
header = MrcHeader()
header['width'] = im.size[0]
header['height'] = im.size[1]
header['depth'] = 1
header['mode'] = pilmode_mrcmode[im.mode]
header.tofile(fp)
rawmode = mrcmode_rawmode[header['mode']]
tile = [("raw", (0,0)+im.size, header.headerlen, (rawmode, 0, 1))]
print 'savetile:', tile
ImageFile._save(im, fp, tile)
def _save(im, fp, filename):
if filename.endswith('.j2k'):
kind = 'j2k'
else:
kind = 'jp2'
# Get the keyword arguments
info = im.encoderinfo
offset = info.get('offset', None)
tile_offset = info.get('tile_offset', None)
tile_size = info.get('tile_size', None)
quality_mode = info.get('quality_mode', 'rates')
quality_layers = info.get('quality_layers', None)
num_resolutions = info.get('num_resolutions', 0)
cblk_size = info.get('codeblock_size', None)
precinct_size = info.get('precinct_size', None)
irreversible = info.get('irreversible', False)
progression = info.get('progression', 'LRCP')
cinema_mode = info.get('cinema_mode', 'no')
fd = -1
if hasattr(fp, "fileno"):
try:
fd = fp.fileno()
except:
fd = -1
im.encoderconfig = (
offset,
tile_offset,
tile_size,
quality_mode,
quality_layers,
num_resolutions,
cblk_size,
precinct_size,
irreversible,
progression,
cinema_mode,
fd
)
ImageFile._save(im, fp, [('jpeg2k', (0, 0)+im.size, 0, kind)])
def _save(im, fp, filename, check=0):
try:
version, bits, planes, rawmode = SAVE[im.mode]
except KeyError:
raise ValueError("Cannot save %s images as PCX" % im.mode)
if check:
return check
# bytes per plane
stride = (im.size[0] * bits + 7) // 8
# under windows, we could determine the current screen size with
# "Image.core.display_mode()[1]", but I think that's overkill...
screen = im.size
dpi = 100, 100
# PCX header
fp.write(
o8(10) + o8(version) + o8(1) + o8(bits) + o16(0) +
o16(0) + o16(im.size[0]-1) + o16(im.size[1]-1) + o16(dpi[0]) +
o16(dpi[1]) + b"\0"*24 + b"\xFF"*24 + b"\0" + o8(planes) +
o16(stride) + o16(1) + o16(screen[0]) + o16(screen[1]) +
b"\0"*54
)
assert fp.tell() == 128
ImageFile._save(im, fp, [("pcx", (0,0)+im.size, 0,
(rawmode, bits*planes))])
if im.mode == "P":
# colour palette
fp.write(o8(12))
fp.write(im.im.getpalette("RGB", "RGB")) # 768 bytes
elif im.mode == "L":
# greyscale palette
fp.write(o8(12))
for i in range(256):
fp.write(o8(i)*3)
def _save(im, fp, filename, check=0):
try:
rawmode, bits, colormaptype, imagetype = SAVE[im.mode]
except KeyError:
raise IOError("cannot write mode %s as TGA" % im.mode)
if check:
return check
if colormaptype:
colormapfirst, colormaplength, colormapentry = 0, 256, 24
else:
colormapfirst, colormaplength, colormapentry = 0, 0, 0
if im.mode == "RGBA":
flags = 8
else:
flags = 0
orientation = im.info.get("orientation", -1)
if orientation > 0:
flags = flags | 0x20
fp.write(
b"\000"
+ o8(colormaptype)
+ o8(imagetype)
+ o16(colormapfirst)
+ o16(colormaplength)
+ o8(colormapentry)
+ o16(0)
+ o16(0)
+ o16(im.size[0])
+ o16(im.size[1])
+ o8(bits)
+ o8(flags)
)
if colormaptype:
fp.write(im.im.getpalette("RGB", "BGR"))
ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, 0, orientation))])
def _save(im, fp, filename):
if im.mode[0] != "F":
im = im.convert('F')
hdr = makeSpiderHeader(im)
if len(hdr) < 256:
raise IOError("Error creating Spider header")
# write the SPIDER header
try:
fp = open(filename, 'wb')
except:
raise IOError("Unable to open %s for writing" % filename)
fp.writelines(hdr)
rawmode = "F;32NF" # 32-bit native floating point
ImageFile._save(im, fp, [("raw", (0, 0)+im.size, 0, (rawmode, 0, 1))])
fp.close()
def _save(im, fp, filename, chunk=putchunk, check=0):
# save an image to disk (called by the save method)
mode = im.mode
if mode == "P":
#
# attempt to minimize storage requirements for palette images
if "bits" in im.encoderinfo:
# number of bits specified by user
n = 1 << im.encoderinfo["bits"]
else:
# check palette contents
n = 256 # FIXME
if n <= 2:
bits = 1
elif n <= 4:
bits = 2
elif n <= 16:
bits = 4
else:
bits = 8
if bits != 8:
mode = "%s;%d" % (mode, bits)
# encoder options
if "dictionary" in im.encoderinfo:
dictionary = im.encoderinfo["dictionary"]
else:
dictionary = b""
im.encoderconfig = ("optimize" in im.encoderinfo,
im.encoderinfo.get("compress_level", -1),
im.encoderinfo.get("compress_type", -1), dictionary)
# get the corresponding PNG mode
try:
rawmode, mode = _OUTMODES[mode]
except KeyError:
raise IOError("cannot write mode %s as PNG" % mode)
if check:
return check
#
# write minimal PNG file
fp.write(_MAGIC)
chunk(
fp,
b"IHDR",
o32(im.size[0]),
o32(im.size[1]), # 0: size
mode, # 8: depth/type
b'\0', # 10: compression
b'\0', # 11: filter category
b'\0') # 12: interlace flag
if im.mode == "P":
palette_bytes = (2**bits) * 3
chunk(fp, b"PLTE", im.im.getpalette("RGB")[:palette_bytes])
if "transparency" in im.encoderinfo:
if im.mode == "P":
# limit to actual palette size
alpha_bytes = 2**bits
if isinstance(im.encoderinfo["transparency"], bytes):
chunk(fp, b"tRNS",
im.encoderinfo["transparency"][:alpha_bytes])
else:
transparency = max(0, min(255, im.encoderinfo["transparency"]))
alpha = b'\xFF' * transparency + b'\0'
chunk(fp, b"tRNS", alpha[:alpha_bytes])
elif im.mode == "L":
transparency = max(0, min(65535, im.encoderinfo["transparency"]))
chunk(fp, b"tRNS", o16(transparency))
elif im.mode == "RGB":
red, green, blue = im.encoderinfo["transparency"]
chunk(fp, b"tRNS", o16(red) + o16(green) + o16(blue))
else:
raise IOError("cannot use transparency for this mode")
else:
if im.mode == "P" and im.im.getpalettemode() == "RGBA":
alpha = im.im.getpalette("RGBA", "A")
alpha_bytes = 2**bits
chunk(fp, b"tRNS", alpha[:alpha_bytes])
if 0:
# FIXME: to be supported some day
chunk(fp, b"gAMA", o32(int(gamma * 100000.0)))
dpi = im.encoderinfo.get("dpi")
if dpi:
chunk(fp, b"pHYs", o32(int(dpi[0] / 0.0254 + 0.5)),
o32(int(dpi[1] / 0.0254 + 0.5)), b'\x01')
info = im.encoderinfo.get("pnginfo")
if info:
for cid, data in info.chunks:
chunk(fp, cid, data)
# ICC profile writing support -- 2008-06-06 Florian Hoech
if "icc_profile" in im.info:
# ICC profile
# according to PNG spec, the iCCP chunk contains:
# Profile name 1-79 bytes (character string)
# Null separator 1 byte (null character)
# Compression method 1 byte (0)
# Compressed profile n bytes (zlib with deflate compression)
try:
import ICCProfile
p = ICCProfile.ICCProfile(im.info["icc_profile"])
name = p.tags.desc.get(
"ASCII",
p.tags.desc.get(
"Unicode",
p.tags.desc.get(
"Macintosh",
p.tags.desc.get("en",
{}).get("US", "ICC Profile")))).encode(
"latin1", "replace")[:79]
except ImportError:
name = b"ICC Profile"
data = name + b"\0\0" + zlib.compress(im.info["icc_profile"])
chunk(fp, b"iCCP", data)
ImageFile._save(im, _idat(fp, chunk),
[("zip", (0, 0) + im.size, 0, rawmode)])
chunk(fp, b"IEND", b"")
try:
fp.flush()
except:
pass
def _save(im, fp, filename):
try:
rawmode, prefix, photo, format, bits, extra = SAVE_INFO[im.mode]
except KeyError:
raise IOError("cannot write mode %s as TIFF" % im.mode)
ifd = ImageFileDirectory(prefix)
compression = im.encoderinfo.get('compression', im.info.get('compression',
'raw'))
libtiff = WRITE_LIBTIFF or compression != 'raw'
# required for color libtiff images
ifd[PLANAR_CONFIGURATION] = getattr(im, '_planar_configuration', 1)
# -- multi-page -- skip TIFF header on subsequent pages
if not libtiff and fp.tell() == 0:
# tiff header (write via IFD to get everything right)
# PIL always starts the first IFD at offset 8
fp.write(ifd.prefix + ifd.o16(42) + ifd.o32(8))
ifd[IMAGEWIDTH] = im.size[0]
ifd[IMAGELENGTH] = im.size[1]
# write any arbitrary tags passed in as an ImageFileDirectory
info = im.encoderinfo.get("tiffinfo", {})
if Image.DEBUG:
print("Tiffinfo Keys: %s" % info.keys)
keys = list(info.keys())
for key in keys:
ifd[key] = info.get(key)
try:
ifd.tagtype[key] = info.tagtype[key]
except:
pass # might not be an IFD, Might not have populated type
# additions written by Greg Couch, [email protected]
# inspired by image-sig posting from Kevin Cazabon, [email protected]
if hasattr(im, 'tag'):
# preserve tags from original TIFF image file
for key in (RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION,
IPTC_NAA_CHUNK, PHOTOSHOP_CHUNK, XMP):
if key in im.tag:
ifd[key] = im.tag[key]
ifd.tagtype[key] = im.tag.tagtype.get(key, None)
# preserve ICC profile (should also work when saving other formats
# which support profiles as TIFF) -- 2008-06-06 Florian Hoech
if "icc_profile" in im.info:
ifd[ICCPROFILE] = im.info["icc_profile"]
for key, name, cvt in [
(IMAGEDESCRIPTION, "description", lambda x: x),
(X_RESOLUTION, "resolution", _cvt_res),
(Y_RESOLUTION, "resolution", _cvt_res),
(X_RESOLUTION, "x_resolution", _cvt_res),
(Y_RESOLUTION, "y_resolution", _cvt_res),
(RESOLUTION_UNIT, "resolution_unit",
lambda x: {"inch": 2, "cm": 3, "centimeter": 3}.get(x, 1)),
(SOFTWARE, "software", lambda x: x),
(DATE_TIME, "date_time", lambda x: x),
(ARTIST, "artist", lambda x: x),
(COPYRIGHT, "copyright", lambda x: x)]:
name_with_spaces = name.replace("_", " ")
if "_" in name and name_with_spaces in im.encoderinfo:
warnings.warn("%r is deprecated; use %r instead" %
(name_with_spaces, name), DeprecationWarning)
ifd[key] = cvt(im.encoderinfo[name.replace("_", " ")])
if name in im.encoderinfo:
ifd[key] = cvt(im.encoderinfo[name])
dpi = im.encoderinfo.get("dpi")
if dpi:
ifd[RESOLUTION_UNIT] = 2
ifd[X_RESOLUTION] = _cvt_res(dpi[0])
ifd[Y_RESOLUTION] = _cvt_res(dpi[1])
if bits != (1,):
ifd[BITSPERSAMPLE] = bits
if len(bits) != 1:
ifd[SAMPLESPERPIXEL] = len(bits)
if extra is not None:
ifd[EXTRASAMPLES] = extra
if format != 1:
ifd[SAMPLEFORMAT] = format
ifd[PHOTOMETRIC_INTERPRETATION] = photo
if im.mode == "P":
lut = im.im.getpalette("RGB", "RGB;L")
ifd[COLORMAP] = tuple(i8(v) * 256 for v in lut)
# data orientation
stride = len(bits) * ((im.size[0]*bits[0]+7)//8)
ifd[ROWSPERSTRIP] = im.size[1]
ifd[STRIPBYTECOUNTS] = stride * im.size[1]
ifd[STRIPOFFSETS] = 0 # this is adjusted by IFD writer
# no compression by default:
ifd[COMPRESSION] = COMPRESSION_INFO_REV.get(compression, 1)
if libtiff:
if Image.DEBUG:
print("Saving using libtiff encoder")
print(ifd.items())
_fp = 0
if hasattr(fp, "fileno"):
try:
fp.seek(0)
_fp = os.dup(fp.fileno())
except io.UnsupportedOperation:
pass
# ICC Profile crashes.
blocklist = [STRIPOFFSETS, STRIPBYTECOUNTS, ROWSPERSTRIP, ICCPROFILE]
atts = {}
# bits per sample is a single short in the tiff directory, not a list.
atts[BITSPERSAMPLE] = bits[0]
# Merge the ones that we have with (optional) more bits from
# the original file, e.g x,y resolution so that we can
# save(load('')) == original file.
for k, v in itertools.chain(ifd.items(),
getattr(im, 'ifd', {}).items()):
if k not in atts and k not in blocklist:
if type(v[0]) == tuple and len(v) > 1:
# A tuple of more than one rational tuples
# flatten to floats,
# following tiffcp.c->cpTag->TIFF_RATIONAL
atts[k] = [float(elt[0])/float(elt[1]) for elt in v]
continue
if type(v[0]) == tuple and len(v) == 1:
# A tuple of one rational tuples
# flatten to floats,
# following tiffcp.c->cpTag->TIFF_RATIONAL
atts[k] = float(v[0][0])/float(v[0][1])
continue
if (type(v) == tuple and
(len(v) > 2 or
(len(v) == 2 and v[1] == 0))):
# List of ints?
# Avoid divide by zero in next if-clause
if type(v[0]) in (int, float):
atts[k] = list(v)
continue
if type(v) == tuple and len(v) == 2:
# one rational tuple
# flatten to float,
# following tiffcp.c->cpTag->TIFF_RATIONAL
atts[k] = float(v[0])/float(v[1])
continue
if type(v) == tuple and len(v) == 1:
v = v[0]
# drop through
if isStringType(v):
atts[k] = bytes(v.encode('ascii', 'replace')) + b"\0"
continue
else:
# int or similar
atts[k] = v
if Image.DEBUG:
print(atts)
# libtiff always expects the bytes in native order.
# we're storing image byte order. So, if the rawmode
# contains I;16, we need to convert from native to image
# byte order.
if im.mode in ('I;16B', 'I;16'):
rawmode = 'I;16N'
a = (rawmode, compression, _fp, filename, atts)
# print (im.mode, compression, a, im.encoderconfig)
e = Image._getencoder(im.mode, 'libtiff', a, im.encoderconfig)
e.setimage(im.im, (0, 0)+im.size)
while True:
# undone, change to self.decodermaxblock:
l, s, d = e.encode(16*1024)
if not _fp:
fp.write(d)
if s:
break
if s < 0:
raise IOError("encoder error %d when writing image file" % s)
else:
offset = ifd.save(fp)
ImageFile._save(im, fp, [
("raw", (0, 0)+im.size, offset, (rawmode, stride, 1))
])
# -- helper for multi-page save --
if "_debug_multipage" in im.encoderinfo:
# just to access o32 and o16 (using correct byte order)
im._debug_multipage = ifd
def _save(im, fp, filename):
try:
rawmode = RAWMODE[im.mode]
except KeyError:
raise IOError("cannot write mode %s as JPEG" % im.mode)
info = im.encoderinfo
dpi = info.get("dpi", (0, 0))
quality = info.get("quality", 0)
subsampling = info.get("subsampling", -1)
qtables = info.get("qtables")
if quality == "keep":
quality = 0
subsampling = "keep"
qtables = "keep"
elif quality in presets:
preset = presets[quality]
quality = 0
subsampling = preset.get('subsampling', -1)
qtables = preset.get('quantization')
elif not isinstance(quality, int):
raise ValueError("Invalid quality setting")
else:
if subsampling in presets:
subsampling = presets[subsampling].get('subsampling', -1)
if isStringType(qtables) and qtables in presets:
qtables = presets[qtables].get('quantization')
if subsampling == "4:4:4":
subsampling = 0
elif subsampling == "4:2:2":
subsampling = 1
elif subsampling == "4:1:1":
subsampling = 2
elif subsampling == "keep":
if im.format != "JPEG":
raise ValueError(
"Cannot use 'keep' when original image is not a JPEG")
subsampling = get_sampling(im)
def validate_qtables(qtables):
if qtables is None:
return qtables
if isStringType(qtables):
try:
lines = [
int(num) for line in qtables.splitlines()
for num in line.split('#', 1)[0].split()
]
except ValueError:
raise ValueError("Invalid quantization table")
else:
qtables = [lines[s:s + 64] for s in range(0, len(lines), 64)]
if isinstance(qtables, (tuple, list, dict)):
if isinstance(qtables, dict):
qtables = convert_dict_qtables(qtables)
elif isinstance(qtables, tuple):
qtables = list(qtables)
if not (0 < len(qtables) < 5):
raise ValueError("None or too many quantization tables")
for idx, table in enumerate(qtables):
try:
if len(table) != 64:
raise
table = array.array('b', table)
except TypeError:
raise ValueError("Invalid quantization table")
else:
qtables[idx] = list(table)
return qtables
if qtables == "keep":
if im.format != "JPEG":
raise ValueError(
"Cannot use 'keep' when original image is not a JPEG")
qtables = getattr(im, "quantization", None)
qtables = validate_qtables(qtables)
extra = b""
icc_profile = info.get("icc_profile")
if icc_profile:
ICC_OVERHEAD_LEN = 14
MAX_BYTES_IN_MARKER = 65533
MAX_DATA_BYTES_IN_MARKER = MAX_BYTES_IN_MARKER - ICC_OVERHEAD_LEN
markers = []
while icc_profile:
markers.append(icc_profile[:MAX_DATA_BYTES_IN_MARKER])
icc_profile = icc_profile[MAX_DATA_BYTES_IN_MARKER:]
i = 1
for marker in markers:
size = struct.pack(">H", 2 + ICC_OVERHEAD_LEN + len(marker))
extra += (b"\xFF\xE2" + size + b"ICC_PROFILE\0" + o8(i) +
o8(len(markers)) + marker)
i += 1
# get keyword arguments
im.encoderconfig = (
quality,
# "progressive" is the official name, but older documentation
# says "progression"
# FIXME: issue a warning if the wrong form is used (post-1.1.7)
"progressive" in info or "progression" in info,
info.get("smooth", 0),
"optimize" in info,
info.get("streamtype", 0),
dpi[0],
dpi[1],
subsampling,
qtables,
extra,
info.get("exif", b""))
# if we optimize, libjpeg needs a buffer big enough to hold the whole image
# in a shot. Guessing on the size, at im.size bytes. (raw pizel size is
# channels*size, this is a value that's been used in a django patch.
# https://github.com/jdriscoll/django-imagekit/issues/50
bufsize = 0
if "optimize" in info or "progressive" in info or "progression" in info:
# keep sets quality to 0, but the actual value may be high.
if quality >= 95 or quality == 0:
bufsize = 2 * im.size[0] * im.size[1]
else:
bufsize = im.size[0] * im.size[1]
# The exif info needs to be written as one block, + APP1, + one spare byte.
# Ensure that our buffer is big enough
bufsize = max(ImageFile.MAXBLOCK, bufsize, len(info.get("exif", b"")) + 5)
ImageFile._save(im, fp, [("jpeg", (0, 0) + im.size, 0, rawmode)], bufsize)
def _save(im, fp, filename):
if _imaging_gif:
# call external driver
try:
_imaging_gif.save(im, fp, filename)
return
except IOError:
pass # write uncompressed file
try:
rawmode = RAWMODE[im.mode]
imOut = im
except KeyError:
# convert on the fly (EXPERIMENTAL -- I'm not sure PIL
# should automatically convert images on save...)
if Image.getmodebase(im.mode) == "RGB":
imOut = im.convert("P")
rawmode = "P"
else:
imOut = im.convert("L")
rawmode = "L"
# header
try:
palette = im.encoderinfo["palette"]
except KeyError:
palette = None
header, usedPaletteColors = getheader(imOut, palette, im.encoderinfo)
for s in header:
fp.write(s)
flags = 0
try:
interlace = im.encoderinfo["interlace"]
except KeyError:
interlace = 1
# workaround for @PIL153
if min(im.size) < 16:
interlace = 0
if interlace:
flags = flags | 64
try:
transparency = im.encoderinfo["transparency"]
except KeyError:
pass
else:
transparency = int(transparency)
# optimize the block away if transparent color is not used
transparentColorExists = True
# adjust the transparency index after optimize
if usedPaletteColors is not None and len(usedPaletteColors) < 256:
for i in range(len(usedPaletteColors)):
if usedPaletteColors[i] == transparency:
transparency = i
transparentColorExists = True
break
else:
transparentColorExists = False
# transparency extension block
if transparentColorExists:
fp.write(b"!" + o8(249) + # extension intro
o8(4) + # length
o8(1) + # transparency info present
o16(0) + # duration
o8(transparency) # transparency index
+ o8(0))
# local image header
fp.write(b"," + o16(0) + o16(0) + # bounding box
o16(im.size[0]) + # size
o16(im.size[1]) + o8(flags) + # flags
o8(8)) # bits
imOut.encoderconfig = (8, interlace)
ImageFile._save(imOut, fp, [("gif", (0, 0) + im.size, 0, rawmode)])
fp.write(b"\0") # end of image data
fp.write(b";") # end of file
try:
fp.flush()
except:
pass
def _save(im, fp, filename):
resolution = im.encoderinfo.get("resolution", 72.0)
#
# make sure image data is available
im.load()
xref = [0] * (5 + 1) # placeholders
class TextWriter:
def __init__(self, fp):
self.fp = fp
def __getattr__(self, name):
return getattr(self.fp, name)
def write(self, value):
self.fp.write(value.encode('latin-1'))
fp = TextWriter(fp)
fp.write("%PDF-1.2\n")
fp.write("% created by PIL PDF driver " + __version__ + "\n")
#
# Get image characteristics
width, height = im.size
# FIXME: Should replace ASCIIHexDecode with RunLengthDecode (packbits)
# or LZWDecode (tiff/lzw compression). Note that PDF 1.2 also supports
# Flatedecode (zip compression).
bits = 8
params = None
if im.mode == "1":
filter = "/ASCIIHexDecode"
colorspace = "/DeviceGray"
procset = "/ImageB" # grayscale
bits = 1
elif im.mode == "L":
filter = "/DCTDecode"
# params = "<< /Predictor 15 /Columns %d >>" % (width-2)
colorspace = "/DeviceGray"
procset = "/ImageB" # grayscale
elif im.mode == "P":
filter = "/ASCIIHexDecode"
colorspace = "[ /Indexed /DeviceRGB 255 <"
palette = im.im.getpalette("RGB")
for i in range(256):
r = i8(palette[i * 3])
g = i8(palette[i * 3 + 1])
b = i8(palette[i * 3 + 2])
colorspace = colorspace + "%02x%02x%02x " % (r, g, b)
colorspace = colorspace + b"> ]"
procset = "/ImageI" # indexed color
elif im.mode == "RGB":
filter = "/DCTDecode"
colorspace = "/DeviceRGB"
procset = "/ImageC" # color images
elif im.mode == "CMYK":
filter = "/DCTDecode"
colorspace = "/DeviceCMYK"
procset = "/ImageC" # color images
else:
raise ValueError("cannot save mode %s" % im.mode)
#
# catalogue
xref[1] = fp.tell()
_obj(fp, 1, Type="/Catalog", Pages="2 0 R")
_endobj(fp)
#
# pages
xref[2] = fp.tell()
_obj(fp, 2, Type="/Pages", Count=1, Kids="[4 0 R]")
_endobj(fp)
#
# image
op = io.BytesIO()
if filter == "/ASCIIHexDecode":
if bits == 1:
# FIXME: the hex encoder doesn't support packed 1-bit
# images; do things the hard way...
data = im.tostring("raw", "1")
im = Image.new("L", (len(data), 1), None)
im.putdata(data)
ImageFile._save(im, op, [("hex", (0, 0) + im.size, 0, im.mode)])
elif filter == "/DCTDecode":
Image.SAVE["JPEG"](im, op, filename)
elif filter == "/FlateDecode":
ImageFile._save(im, op, [("zip", (0, 0) + im.size, 0, im.mode)])
elif filter == "/RunLengthDecode":
ImageFile._save(im, op, [("packbits", (0, 0) + im.size, 0, im.mode)])
else:
raise ValueError("unsupported PDF filter (%s)" % filter)
xref[3] = fp.tell()
_obj(
fp,
3,
Type="/XObject",
Subtype="/Image",
Width=width, # * 72.0 / resolution,
Height=height, # * 72.0 / resolution,
Length=len(op.getvalue()),
Filter=filter,
BitsPerComponent=bits,
DecodeParams=params,
ColorSpace=colorspace)
fp.write("stream\n")
fp.fp.write(op.getvalue())
fp.write("\nendstream\n")
_endobj(fp)
#
# page
xref[4] = fp.tell()
_obj(fp, 4)
fp.write("<<\n/Type /Page\n/Parent 2 0 R\n"\
"/Resources <<\n/ProcSet [ /PDF %s ]\n"\
"/XObject << /image 3 0 R >>\n>>\n"\
"/MediaBox [ 0 0 %d %d ]\n/Contents 5 0 R\n>>\n" %\
(procset, int(width * 72.0 /resolution) , int(height * 72.0 / resolution)))
_endobj(fp)
#
# page contents
op = TextWriter(io.BytesIO())
op.write("q %d 0 0 %d 0 0 cm /image Do Q\n" %
(int(width * 72.0 / resolution), int(height * 72.0 / resolution)))
xref[5] = fp.tell()
_obj(fp, 5, Length=len(op.fp.getvalue()))
fp.write("stream\n")
fp.fp.write(op.fp.getvalue())
fp.write("\nendstream\n")
_endobj(fp)
#
# trailer
startxref = fp.tell()
fp.write("xref\n0 %d\n0000000000 65535 f \n" % len(xref))
for x in xref[1:]:
fp.write("%010d 00000 n \n" % x)
fp.write("trailer\n<<\n/Size %d\n/Root 1 0 R\n>>\n" % len(xref))
fp.write("startxref\n%d\n%%%%EOF\n" % startxref)
fp.flush()
def _save(im, fp, filename, save_all=False):
im.encoderinfo.update(im.info)
if _imaging_gif:
# call external driver
try:
_imaging_gif.save(im, fp, filename)
return
except IOError:
pass # write uncompressed file
if im.mode in RAWMODE:
im_out = im.copy()
else:
im_out = _convert_mode(im, True)
# header
try:
palette = im.encoderinfo["palette"]
except KeyError:
palette = None
im.encoderinfo["optimize"] = im.encoderinfo.get("optimize", True)
if save_all:
previous = None
first_frame = None
for im_frame in ImageSequence.Iterator(im):
im_frame = _convert_mode(im_frame)
# To specify duration, add the time in milliseconds to getdata(),
# e.g. getdata(im_frame, duration=1000)
if not previous:
# global header
first_frame = getheader(im_frame, palette, im.encoderinfo)[0]
first_frame += getdata(im_frame, (0, 0), **im.encoderinfo)
else:
if first_frame:
for s in first_frame:
fp.write(s)
first_frame = None
# delta frame
delta = ImageChops.subtract_modulo(im_frame, previous.copy())
bbox = delta.getbbox()
if bbox:
# compress difference
for s in getdata(im_frame.crop(bbox), bbox[:2],
**im.encoderinfo):
fp.write(s)
else:
# FIXME: what should we do in this case?
pass
previous = im_frame
if first_frame:
save_all = False
if not save_all:
header = getheader(im_out, palette, im.encoderinfo)[0]
for s in header:
fp.write(s)
flags = 0
if get_interlace(im):
flags = flags | 64
# local image header
_get_local_header(fp, im, (0, 0), flags)
im_out.encoderconfig = (8, get_interlace(im))
ImageFile._save(im_out, fp,
[("gif", (0, 0) + im.size, 0, RAWMODE[im_out.mode])])
fp.write(b"\0") # end of image data
fp.write(b";") # end of file
if hasattr(fp, "flush"):
fp.flush()
def _save(im, fp, filename):
try:
rawmode, prefix, photo, format, bits, extra = SAVE_INFO[im.mode]
except KeyError:
raise IOError("cannot write mode %s as TIFF" % im.mode)
ifd = ImageFileDirectory_v2(prefix=prefix)
compression = im.encoderinfo.get('compression',
im.info.get('compression', 'raw'))
libtiff = WRITE_LIBTIFF or compression != 'raw'
# required for color libtiff images
ifd[PLANAR_CONFIGURATION] = getattr(im, '_planar_configuration', 1)
ifd[IMAGEWIDTH] = im.size[0]
ifd[IMAGELENGTH] = im.size[1]
# write any arbitrary tags passed in as an ImageFileDirectory
info = im.encoderinfo.get("tiffinfo", {})
if DEBUG:
print("Tiffinfo Keys: %s" % list(info))
if isinstance(info, ImageFileDirectory_v1):
info = info.to_v2()
for key in info:
ifd[key] = info.get(key)
try:
ifd.tagtype[key] = info.tagtype[key]
except:
pass # might not be an IFD, Might not have populated type
# additions written by Greg Couch, [email protected]
# inspired by image-sig posting from Kevin Cazabon, [email protected]
if hasattr(im, 'tag_v2'):
# preserve tags from original TIFF image file
for key in (RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION,
IPTC_NAA_CHUNK, PHOTOSHOP_CHUNK, XMP):
if key in im.tag_v2:
ifd[key] = im.tag_v2[key]
ifd.tagtype[key] = im.tag_v2.tagtype.get(key, None)
# preserve ICC profile (should also work when saving other formats
# which support profiles as TIFF) -- 2008-06-06 Florian Hoech
if "icc_profile" in im.info:
ifd[ICCPROFILE] = im.info["icc_profile"]
for key, name in [(IMAGEDESCRIPTION, "description"),
(X_RESOLUTION, "resolution"),
(Y_RESOLUTION, "resolution"),
(X_RESOLUTION, "x_resolution"),
(Y_RESOLUTION, "y_resolution"),
(RESOLUTION_UNIT, "resolution_unit"),
(SOFTWARE, "software"),
(DATE_TIME, "date_time"),
(ARTIST, "artist"),
(COPYRIGHT, "copyright")]:
name_with_spaces = name.replace("_", " ")
if "_" in name and name_with_spaces in im.encoderinfo:
warnings.warn("%r is deprecated; use %r instead" %
(name_with_spaces, name), DeprecationWarning)
ifd[key] = im.encoderinfo[name.replace("_", " ")]
if name in im.encoderinfo:
ifd[key] = im.encoderinfo[name]
dpi = im.encoderinfo.get("dpi")
if dpi:
ifd[RESOLUTION_UNIT] = 2
ifd[X_RESOLUTION] = dpi[0]
ifd[Y_RESOLUTION] = dpi[1]
if bits != (1,):
ifd[BITSPERSAMPLE] = bits
if len(bits) != 1:
ifd[SAMPLESPERPIXEL] = len(bits)
if extra is not None:
ifd[EXTRASAMPLES] = extra
if format != 1:
ifd[SAMPLEFORMAT] = format
ifd[PHOTOMETRIC_INTERPRETATION] = photo
if im.mode == "P":
lut = im.im.getpalette("RGB", "RGB;L")
ifd[COLORMAP] = tuple(i8(v) * 256 for v in lut)
# data orientation
stride = len(bits) * ((im.size[0]*bits[0]+7)//8)
ifd[ROWSPERSTRIP] = im.size[1]
ifd[STRIPBYTECOUNTS] = stride * im.size[1]
ifd[STRIPOFFSETS] = 0 # this is adjusted by IFD writer
# no compression by default:
ifd[COMPRESSION] = COMPRESSION_INFO_REV.get(compression, 1)
if libtiff:
if DEBUG:
print("Saving using libtiff encoder")
print("Items: %s" % sorted(ifd.items()))
_fp = 0
if hasattr(fp, "fileno"):
try:
fp.seek(0)
_fp = os.dup(fp.fileno())
except io.UnsupportedOperation:
pass
# STRIPOFFSETS and STRIPBYTECOUNTS are added by the library
# based on the data in the strip.
# ICCPROFILE crashes.
blocklist = [STRIPOFFSETS, STRIPBYTECOUNTS, ICCPROFILE]
atts = {}
# bits per sample is a single short in the tiff directory, not a list.
atts[BITSPERSAMPLE] = bits[0]
# Merge the ones that we have with (optional) more bits from
# the original file, e.g x,y resolution so that we can
# save(load('')) == original file.
legacy_ifd = {}
if hasattr(im, 'tag'):
legacy_ifd = im.tag.to_v2()
for k, v in itertools.chain(ifd.items(),
getattr(im, 'tag_v2', {}).items(),
legacy_ifd.items()):
if k not in atts and k not in blocklist:
if isinstance(v, unicode if bytes is str else str):
atts[k] = v.encode('ascii', 'replace') + b"\0"
else:
atts[k] = v
if DEBUG:
print("Converted items: %s" % sorted(atts.items()))
# libtiff always expects the bytes in native order.
# we're storing image byte order. So, if the rawmode
# contains I;16, we need to convert from native to image
# byte order.
if im.mode in ('I;16B', 'I;16'):
rawmode = 'I;16N'
a = (rawmode, compression, _fp, filename, atts)
# print(im.mode, compression, a, im.encoderconfig)
e = Image._getencoder(im.mode, 'libtiff', a, im.encoderconfig)
e.setimage(im.im, (0, 0)+im.size)
while True:
# undone, change to self.decodermaxblock:
l, s, d = e.encode(16*1024)
if not _fp:
fp.write(d)
if s:
break
if s < 0:
raise IOError("encoder error %d when writing image file" % s)
else:
offset = ifd.save(fp)
ImageFile._save(im, fp, [
("raw", (0, 0)+im.size, offset, (rawmode, stride, 1))
])
# -- helper for multi-page save --
if "_debug_multipage" in im.encoderinfo:
# just to access o32 and o16 (using correct byte order)
im._debug_multipage = ifd
def _save_frame(im, fp, cert_flag):
# Return bytes for one frame
try:
info = im.encoderinfo
except:
im.encoderinfo = {}
info = im.encoderinfo
image_data = io.BytesIO()
ns = im.header
if im.mode == 'L':
bit_depth = 8
else:
bit_depth = 24
if ns['image_compression_algo'] == "RAW":
im.encoderconfig = ()
encoder = ('raw', (0, 0) + im.size, 0, (im.mode, 0, 1))
bit_depth = 8
ImageFile._save(im, image_data, [encoder])
elif ns['image_compression_algo'] == "RAW_PACKED":
im.encoderconfig()
encoder = ('raw', (0, 0) + im.size, 0, (im.mode, 0, 1))
bit_depth = 8
ImageFile._save(im, image_data, [encoder])
elif ns['image_compression_algo'] == "WSQ":
im.encoderconfig()
encoder = ('wsq', (0, 0) + im.size, 0, (12, ))
bit_depth = 8
ImageFile._save(im, image_data, [encoder])
elif ns['image_compression_algo'] == "JPEG":
info['quality'] = 'maximum'
info['dpi'] = (im.header.get('horizontal_image_sampling_rate', 500),
im.header.get('vertical_image_sampling_rate', 500))
PIL.JpegImagePlugin._save(im, image_data, "")
elif ns['image_compression_algo'] == "JPEG2000_LOSSY":
info['quality_mode'] = "rates"
info['quality_layers'] = (15, )
# XXX parameters needed? (up to 15 compression max according to the specs)
PIL.Jpeg2KImagePlugin._save(im, image_data, "non.j2k")
elif ns['image_compression_algo'] == "JPEG2000_LOSSLESS":
info['quality_mode'] = "rates"
info['quality_layers'] = (0, )
# XXX parameters needed? (up to 15 compression max according to the specs)
PIL.Jpeg2KImagePlugin._save(im, image_data, "non.j2k")
else:
raise SyntaxError("Unknown compression algo " +
ns['image_compression_algo'])
image_data = image_data.getvalue()
dt = ns.get('capture_datetime', datetime.datetime.now())
rheader = b''
rheader += struct.pack(">HBBBBBH", dt.year, dt.month, dt.day, dt.hour,
dt.minute, dt.second, int(dt.microsecond / 1000))
rheader += struct.pack(">s2s2sB",
ns.get('capture_device_technology_id', b'\x00'),
ns.get('capture_device_vendor_id', b'\x00\x00'),
ns.get('capture_device_type_id', b'\x00\x00'),
len(ns.get('quality_records', [])))
for q in ns.get('quality_records', []):
rheader += struct.pack(">B2s2s", q.score, q.algo_vendor_id, q.algo_id)
if cert_flag:
rheader += struct.pack(">B", len(ns.get('certification_records', [])))
for c in ns.get('certification_records', []):
rheader += struct.pack(">2s1s", c.authority_id, c.scheme_id)
rheader += struct.pack(
">BBBHHHHBBBHHI", POSITION[ns.get('position', 'UNKNOWN')],
ns['number'], UNIT[ns.get('scale_units', 'PPI')],
ns.get('horizontal_scan_sampling_rate', 500),
ns.get('vertical_scan_sampling_rate', 500),
ns.get('horizontal_image_sampling_rate', 500),
ns.get('vertical_image_sampling_rate',
500), bit_depth, COMPRESSION[ns.get('image_compression_algo',
'RAW')],
IMPRESSION[ns.get('impression_type',
'UNKNOWN')], im.size[0], im.size[1], len(image_data))
# Write the frame
fp.write(struct.pack(">I", 4 + len(rheader) + len(image_data)))
fp.write(rheader)
fp.write(image_data)
def _save(im, fp, filename, save_all=False):
im.encoderinfo.update(im.info)
if _imaging_gif:
# call external driver
try:
_imaging_gif.save(im, fp, filename)
return
except IOError:
pass # write uncompressed file
if im.mode in RAWMODE:
im_out = im.copy()
else:
im_out = _convert_mode(im, True)
# header
try:
palette = im.encoderinfo["palette"]
except KeyError:
palette = None
im.encoderinfo["optimize"] = im.encoderinfo.get("optimize", True)
if save_all:
previous = None
first_frame = None
append_images = im.encoderinfo.get("append_images", [])
if "duration" in im.encoderinfo:
duration = im.encoderinfo["duration"]
else:
duration = None
frame_count = 0
for imSequence in [im]+append_images:
for im_frame in ImageSequence.Iterator(imSequence):
encoderinfo = im.encoderinfo.copy()
im_frame = _convert_mode(im_frame)
if isinstance(duration, (list, tuple)):
encoderinfo["duration"] = duration[frame_count]
frame_count += 1
# To specify duration, add the time in milliseconds to getdata(),
# e.g. getdata(im_frame, duration=1000)
if not previous:
# global header
first_frame = getheader(im_frame, palette, encoderinfo)[0]
first_frame += getdata(im_frame, (0, 0), **encoderinfo)
else:
if first_frame:
for s in first_frame:
fp.write(s)
first_frame = None
# delta frame
delta = ImageChops.subtract_modulo(im_frame, previous.copy())
bbox = delta.getbbox()
if bbox:
# compress difference
encoderinfo['include_color_table'] = True
for s in getdata(im_frame.crop(bbox),
bbox[:2], **encoderinfo):
fp.write(s)
else:
# FIXME: what should we do in this case?
pass
previous = im_frame
if first_frame:
save_all = False
if not save_all:
header = getheader(im_out, palette, im.encoderinfo)[0]
for s in header:
fp.write(s)
flags = 0
if get_interlace(im):
flags = flags | 64
# local image header
_get_local_header(fp, im, (0, 0), flags)
im_out.encoderconfig = (8, get_interlace(im))
ImageFile._save(im_out, fp, [("gif", (0, 0)+im.size, 0,
RAWMODE[im_out.mode])])
fp.write(b"\0") # end of image data
fp.write(b";") # end of file
if hasattr(fp, "flush"):
fp.flush()
def _save(im, fp, filename):
try:
rawmode = RAWMODE[im.mode]
except KeyError:
raise IOError("cannot write mode %s as JPEG" % im.mode)
info = im.encoderinfo
dpi = info.get("dpi", (0, 0))
quality = info.get("quality", 0)
subsampling = info.get("subsampling", -1)
qtables = info.get("qtables")
if quality == "keep":
quality = 0
subsampling = "keep"
qtables = "keep"
elif quality in presets:
preset = presets[quality]
quality = 0
subsampling = preset.get('subsampling', -1)
qtables = preset.get('quantization')
elif not isinstance(quality, int):
raise ValueError("Invalid quality setting")
else:
if subsampling in presets:
subsampling = presets[subsampling].get('subsampling', -1)
if qtables in presets:
qtables = presets[qtables].get('quantization')
if subsampling == "4:4:4":
subsampling = 0
elif subsampling == "4:2:2":
subsampling = 1
elif subsampling == "4:1:1":
subsampling = 2
elif subsampling == "keep":
if im.format != "JPEG":
raise ValueError(
"Cannot use 'keep' when original image is not a JPEG")
subsampling = get_sampling(im)
def validate_qtables(qtables):
if qtables is None:
return qtables
if isinstance(qtables, basestring):
try:
lines = [
int(num) for line in qtables.splitlines()
for num in line.split('#', 1)[0].split()
]
except ValueError:
raise ValueError("Invalid quantization table")
else:
qtables = [lines[s:s + 64] for s in xrange(0, len(lines), 64)]
if isinstance(qtables, (tuple, list, dict)):
if isinstance(qtables, dict):
qtables = convert_dict_qtables(qtables)
elif isinstance(qtables, tuple):
qtables = list(qtables)
if not (0 < len(qtables) < 5):
raise ValueError("None or too many quantization tables")
for idx, table in enumerate(qtables):
try:
if len(table) != 64:
raise
table = array.array('b', table)
except TypeError:
raise ValueError("Invalid quantization table")
else:
qtables[idx] = list(table)
return qtables
if qtables == "keep":
if im.format != "JPEG":
raise ValueError(
"Cannot use 'keep' when original image is not a JPEG")
qtables = getattr(im, "quantization", None)
qtables = validate_qtables(qtables)
extra = b""
icc_profile = info.get("icc_profile")
if icc_profile:
ICC_OVERHEAD_LEN = 14
MAX_BYTES_IN_MARKER = 65533
MAX_DATA_BYTES_IN_MARKER = MAX_BYTES_IN_MARKER - ICC_OVERHEAD_LEN
markers = []
while icc_profile:
markers.append(icc_profile[:MAX_DATA_BYTES_IN_MARKER])
icc_profile = icc_profile[MAX_DATA_BYTES_IN_MARKER:]
i = 1
for marker in markers:
size = struct.pack(">H", 2 + ICC_OVERHEAD_LEN + len(marker))
extra = extra + (b"\xFF\xE2" + size + b"ICC_PROFILE\0" + o8(i) +
o8(len(markers)) + marker)
i = i + 1
# get keyword arguments
im.encoderconfig = (
quality,
# "progressive" is the official name, but older documentation
# says "progression"
# FIXME: issue a warning if the wrong form is used (post-1.1.7)
"progressive" in info or "progression" in info,
info.get("smooth", 0),
"optimize" in info,
info.get("streamtype", 0),
dpi[0],
dpi[1],
subsampling,
qtables,
extra,
info.get("exif", b""))
ImageFile._save(im, fp, [("jpeg", (0, 0) + im.size, 0, rawmode)])
def _save(im, fp, filename):
if _imaging_gif:
# call external driver
try:
_imaging_gif.save(im, fp, filename)
return
except IOError:
pass # write uncompressed file
try:
rawmode = RAWMODE[im.mode]
imOut = im
except KeyError:
# convert on the fly (EXPERIMENTAL -- I'm not sure PIL
# should automatically convert images on save...)
if Image.getmodebase(im.mode) == "RGB":
palette_size = 256
if im.palette:
palette_size = len(im.palette.getdata()[1]) // 3
imOut = im.convert("P", palette=1, colors=palette_size)
rawmode = "P"
else:
imOut = im.convert("L")
rawmode = "L"
# header
try:
palette = im.encoderinfo["palette"]
except KeyError:
palette = None
im.encoderinfo["optimize"] = im.encoderinfo.get("optimize", True)
if im.encoderinfo["optimize"]:
# When the mode is L, and we optimize, we end up with
# im.mode == P and rawmode = L, which fails.
# If we're optimizing the palette, we're going to be
# in a rawmode of P anyway.
rawmode = 'P'
header, usedPaletteColors = getheader(imOut, palette, im.encoderinfo)
for s in header:
fp.write(s)
flags = 0
try:
interlace = im.encoderinfo["interlace"]
except KeyError:
interlace = 1
# workaround for @PIL153
if min(im.size) < 16:
interlace = 0
if interlace:
flags = flags | 64
try:
transparency = im.encoderinfo["transparency"]
except KeyError:
pass
else:
transparency = int(transparency)
# optimize the block away if transparent color is not used
transparentColorExists = True
# adjust the transparency index after optimize
if usedPaletteColors is not None and len(usedPaletteColors) < 256:
for i in range(len(usedPaletteColors)):
if usedPaletteColors[i] == transparency:
transparency = i
transparentColorExists = True
break
else:
transparentColorExists = False
# transparency extension block
if transparentColorExists:
fp.write(b"!" +
o8(249) + # extension intro
o8(4) + # length
o8(1) + # transparency info present
o16(0) + # duration
o8(transparency) # transparency index
+ o8(0))
# local image header
fp.write(b"," +
o16(0) + o16(0) + # bounding box
o16(im.size[0]) + # size
o16(im.size[1]) +
o8(flags) + # flags
o8(8)) # bits
imOut.encoderconfig = (8, interlace)
ImageFile._save(imOut, fp, [("gif", (0,0)+im.size, 0, rawmode)])
fp.write(b"\0") # end of image data
fp.write(b";") # end of file
try:
fp.flush()
except: pass
def _save(im, fp, filename):
try:
rawmode, byteorder, photo, format, bits, extra = SAVE_INFO[im.mode]
except KeyError:
raise IOError("cannot write mode %s as TIFF" % im.mode)
ifd = ImageFileDirectory(BYTEORDER_TO_PREFIX[byteorder])
#seb -- multi-page -- added `if`
if fp.tell() == 0:
# tiff header (write via IFD to get everything right)
# PIL always starts the first IFD at offset 8
fp.write(ifd.prefix + ifd.o16(42) + ifd.o32(8))
#seb debug print "DEBUG: 000", fp.tell()
ifd[IMAGEWIDTH] = im.size[0]
ifd[IMAGELENGTH] = im.size[1]
# additions written by Greg Couch, [email protected]
# inspired by image-sig posting from Kevin Cazabon, [email protected]
if hasattr(im, 'tag'):
# preserve tags from original TIFF image file
for key in (RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION):
if im.tag.tagdata.has_key(key):
ifd[key] = im.tag.tagdata.get(key)
if im.encoderinfo.has_key("description"):
ifd[IMAGEDESCRIPTION] = im.encoderinfo["description"]
if im.encoderinfo.has_key("resolution"):
ifd[X_RESOLUTION] = ifd[Y_RESOLUTION] \
= _cvt_res(im.encoderinfo["resolution"])
if im.encoderinfo.has_key("x resolution"):
ifd[X_RESOLUTION] = _cvt_res(im.encoderinfo["x resolution"])
if im.encoderinfo.has_key("y resolution"):
ifd[Y_RESOLUTION] = _cvt_res(im.encoderinfo["y resolution"])
if im.encoderinfo.has_key("resolution unit"):
unit = im.encoderinfo["resolution unit"]
if unit == "inch":
ifd[RESOLUTION_UNIT] = 2
elif unit == "cm" or unit == "centimeter":
ifd[RESOLUTION_UNIT] = 3
else:
ifd[RESOLUTION_UNIT] = 1
if im.encoderinfo.has_key("software"):
ifd[SOFTWARE] = im.encoderinfo["software"]
if im.encoderinfo.has_key("date time"):
ifd[DATE_TIME] = im.encoderinfo["date time"]
if im.encoderinfo.has_key("artist"):
ifd[ARTIST] = im.encoderinfo["artist"]
if im.encoderinfo.has_key("copyright"):
ifd[COPYRIGHT] = im.encoderinfo["copyright"]
dpi = im.encoderinfo.get("dpi")
if dpi:
ifd[RESOLUTION_UNIT] = 2
ifd[X_RESOLUTION] = _cvt_res(dpi[0])
ifd[Y_RESOLUTION] = _cvt_res(dpi[1])
if bits != (1, ):
ifd[BITSPERSAMPLE] = bits
if len(bits) != 1:
ifd[SAMPLESPERPIXEL] = len(bits)
if extra is not None:
ifd[EXTRASAMPLES] = extra
if format != 1:
ifd[SAMPLEFORMAT] = format
ifd[PHOTOMETRIC_INTERPRETATION] = photo
if im.mode == "P":
lut = im.im.getpalette("RGB", "RGB;L")
ifd[COLORMAP] = tuple(map(lambda v: ord(v) * 256, lut))
# data orientation
stride = len(bits) * ((im.size[0] * bits[0] + 7) / 8)
ifd[ROWSPERSTRIP] = im.size[1]
ifd[STRIPBYTECOUNTS] = stride * im.size[1]
ifd[STRIPOFFSETS] = 0 # this is adjusted by IFD writer
ifd[COMPRESSION] = 1 # no compression
offset = ifd.save(fp)
ImageFile._save(im, fp,
[("raw", (0, 0) + im.size, offset, (rawmode, stride, 1))])
#seb -- multi-page --
if im.encoderinfo.has_key("_debug_multipage"):
#just to access o32 and o16 (using correct byte order)
im._debug_multipage = ifd
def _save(im, fp, filename, eps=1):
"""EPS Writer for the Python Imaging Library."""
#
# make sure image data is available
im.load()
#
# determine postscript image mode
if im.mode == "L":
operator = (8, 1, "image")
elif im.mode == "RGB":
operator = (8, 3, "false 3 colorimage")
elif im.mode == "CMYK":
operator = (8, 4, "false 4 colorimage")
else:
raise ValueError("image mode is not supported")
class NoCloseStream:
def __init__(self, fp):
self.fp = fp
def __getattr__(self, name):
return getattr(self.fp, name)
def close(self):
pass
base_fp = fp
fp = NoCloseStream(fp)
if sys.version_info[0] > 2:
fp = io.TextIOWrapper(fp, encoding='latin-1')
if eps:
#
# write EPS header
fp.write("%!PS-Adobe-3.0 EPSF-3.0\n")
fp.write("%%Creator: PIL 0.1 EpsEncode\n")
# fp.write("%%CreationDate: %s"...)
fp.write("%%%%BoundingBox: 0 0 %d %d\n" % im.size)
fp.write("%%Pages: 1\n")
fp.write("%%EndComments\n")
fp.write("%%Page: 1 1\n")
fp.write("%%ImageData: %d %d " % im.size)
fp.write("%d %d 0 1 1 \"%s\"\n" % operator)
#
# image header
fp.write("gsave\n")
fp.write("10 dict begin\n")
fp.write("/buf %d string def\n" % (im.size[0] * operator[1]))
fp.write("%d %d scale\n" % im.size)
fp.write("%d %d 8\n" % im.size) # <= bits
fp.write("[%d 0 0 -%d 0 %d]\n" % (im.size[0], im.size[1], im.size[1]))
fp.write("{ currentfile buf readhexstring pop } bind\n")
fp.write(operator[2] + "\n")
fp.flush()
ImageFile._save(im, base_fp, [("eps", (0, 0)+im.size, 0, None)])
fp.write("\n%%%%EndBinary\n")
fp.write("grestore end\n")
fp.flush()
def _save(im, fp, filename, chunk=putchunk, check=0):
# save an image to disk (called by the save method)
mode = im.mode
if mode == "P":
#
# attempt to minimize storage requirements for palette images
if "bits" in im.encoderinfo:
# number of bits specified by user
n = 1 << im.encoderinfo["bits"]
else:
# check palette contents
n = 256 # FIXME
if n <= 2:
bits = 1
elif n <= 4:
bits = 2
elif n <= 16:
bits = 4
else:
bits = 8
if bits != 8:
mode = "%s;%d" % (mode, bits)
# encoder options
if "dictionary" in im.encoderinfo:
dictionary = im.encoderinfo["dictionary"]
else:
dictionary = b""
im.encoderconfig = ("optimize" in im.encoderinfo, dictionary)
# get the corresponding PNG mode
try:
rawmode, mode = _OUTMODES[mode]
except KeyError:
raise IOError("cannot write mode %s as PNG" % mode)
if check:
return check
#
# write minimal PNG file
fp.write(_MAGIC)
chunk(fp, b"IHDR",
o32(im.size[0]), o32(im.size[1]), # 0: size
mode, # 8: depth/type
b'\0', # 10: compression
b'\0', # 11: filter category
b'\0') # 12: interlace flag
if im.mode == "P":
chunk(fp, b"PLTE", im.im.getpalette("RGB"))
if "transparency" in im.encoderinfo:
if im.mode == "P":
transparency = max(0, min(255, im.encoderinfo["transparency"]))
chunk(fp, b"tRNS", b'\xFF' * transparency + b'\0')
elif im.mode == "L":
transparency = max(0, min(65535, im.encoderinfo["transparency"]))
chunk(fp, b"tRNS", o16(transparency))
elif im.mode == "RGB":
red, green, blue = im.encoderinfo["transparency"]
chunk(fp, b"tRNS", o16(red) + o16(green) + o16(blue))
else:
raise IOError("cannot use transparency for this mode")
if 0:
# FIXME: to be supported some day
chunk(fp, b"gAMA", o32(int(gamma * 100000.0)))
dpi = im.encoderinfo.get("dpi")
if dpi:
chunk(fp, b"pHYs",
o32(int(dpi[0] / 0.0254 + 0.5)),
o32(int(dpi[1] / 0.0254 + 0.5)),
b'\x01')
info = im.encoderinfo.get("pnginfo")
if info:
for cid, data in info.chunks:
chunk(fp, cid, data)
# ICC profile writing support -- 2008-06-06 Florian Hoech
if "icc_profile" in im.info:
# ICC profile
# according to PNG spec, the iCCP chunk contains:
# Profile name 1-79 bytes (character string)
# Null separator 1 byte (null character)
# Compression method 1 byte (0)
# Compressed profile n bytes (zlib with deflate compression)
try:
import ICCProfile
p = ICCProfile.ICCProfile(im.info["icc_profile"])
name = p.tags.desc.get("ASCII", p.tags.desc.get("Unicode", p.tags.desc.get("Macintosh", p.tags.desc.get("en", {}).get("US", "ICC Profile")))).encode("latin1", "replace")[:79]
except ImportError:
name = b"ICC Profile"
data = name + b"\0\0" + zlib.compress(im.info["icc_profile"])
chunk(fp, b"iCCP", data)
ImageFile._save(im, _idat(fp, chunk), [("zip", (0,0)+im.size, 0, rawmode)])
chunk(fp, b"IEND", b"")
try:
fp.flush()
except:
pass
def _save(im, fp, filename, chunk=putchunk, check=0):
# save an image to disk (called by the save method)
mode = im.mode
if mode == "P":
#
# attempt to minimize storage requirements for palette images
if "bits" in im.encoderinfo:
# number of bits specified by user
colors = 1 << im.encoderinfo["bits"]
else:
# check palette contents
if im.palette:
colors = max(min(len(im.palette.getdata()[1])//3, 256), 2)
else:
colors = 256
if colors <= 2:
bits = 1
elif colors <= 4:
bits = 2
elif colors <= 16:
bits = 4
else:
bits = 8
if bits != 8:
mode = "%s;%d" % (mode, bits)
# encoder options
if "dictionary" in im.encoderinfo:
dictionary = im.encoderinfo["dictionary"]
else:
dictionary = b""
im.encoderconfig = ("optimize" in im.encoderinfo,
im.encoderinfo.get("compress_level", -1),
im.encoderinfo.get("compress_type", -1),
dictionary)
# get the corresponding PNG mode
try:
rawmode, mode = _OUTMODES[mode]
except KeyError:
raise IOError("cannot write mode %s as PNG" % mode)
if check:
return check
#
# write minimal PNG file
fp.write(_MAGIC)
chunk(fp, b"IHDR",
o32(im.size[0]), o32(im.size[1]), # 0: size
mode, # 8: depth/type
b'\0', # 10: compression
b'\0', # 11: filter category
b'\0') # 12: interlace flag
if im.mode == "P":
palette_byte_number = (2 ** bits) * 3
palette_bytes = im.im.getpalette("RGB")[:palette_byte_number]
while len(palette_bytes) < palette_byte_number:
palette_bytes += b'\0'
chunk(fp, b"PLTE", palette_bytes)
transparency = im.encoderinfo.get('transparency',
im.info.get('transparency', None))
if transparency or transparency == 0:
if im.mode == "P":
# limit to actual palette size
alpha_bytes = 2**bits
if isinstance(transparency, bytes):
chunk(fp, b"tRNS", transparency[:alpha_bytes])
else:
transparency = max(0, min(255, transparency))
alpha = b'\xFF' * transparency + b'\0'
chunk(fp, b"tRNS", alpha[:alpha_bytes])
elif im.mode == "L":
transparency = max(0, min(65535, transparency))
chunk(fp, b"tRNS", o16(transparency))
elif im.mode == "RGB":
red, green, blue = transparency
chunk(fp, b"tRNS", o16(red) + o16(green) + o16(blue))
else:
if "transparency" in im.encoderinfo:
# don't bother with transparency if it's an RGBA
# and it's in the info dict. It's probably just stale.
raise IOError("cannot use transparency for this mode")
else:
if im.mode == "P" and im.im.getpalettemode() == "RGBA":
alpha = im.im.getpalette("RGBA", "A")
alpha_bytes = 2**bits
chunk(fp, b"tRNS", alpha[:alpha_bytes])
dpi = im.encoderinfo.get("dpi")
if dpi:
chunk(fp, b"pHYs",
o32(int(dpi[0] / 0.0254 + 0.5)),
o32(int(dpi[1] / 0.0254 + 0.5)),
b'\x01')
info = im.encoderinfo.get("pnginfo")
if info:
for cid, data in info.chunks:
chunk(fp, cid, data)
# ICC profile writing support -- 2008-06-06 Florian Hoech
if im.info.get("icc_profile"):
# ICC profile
# according to PNG spec, the iCCP chunk contains:
# Profile name 1-79 bytes (character string)
# Null separator 1 byte (null character)
# Compression method 1 byte (0)
# Compressed profile n bytes (zlib with deflate compression)
name = b"ICC Profile"
data = name + b"\0\0" + zlib.compress(im.info["icc_profile"])
chunk(fp, b"iCCP", data)
ImageFile._save(im, _idat(fp, chunk),
[("zip", (0, 0)+im.size, 0, rawmode)])
chunk(fp, b"IEND", b"")
if hasattr(fp, "flush"):
fp.flush()
def _save(im, fp, filename):
if _imaging_gif:
# call external driver
try:
_imaging_gif.save(im, fp, filename)
return
except IOError:
pass # write uncompressed file
try:
rawmode = RAWMODE[im.mode]
imOut = im
except KeyError:
# convert on the fly (EXPERIMENTAL -- I'm not sure PIL
# should automatically convert images on save...)
if Image.getmodebase(im.mode) == "RGB":
imOut = im.convert("P")
rawmode = "P"
else:
imOut = im.convert("L")
rawmode = "L"
# header
try:
palette = im.encoderinfo["palette"]
except KeyError:
palette = None
if im.palette:
# use existing if possible
palette = im.palette.getdata()[1]
header, usedPaletteColors = getheader(imOut, palette, im.encoderinfo)
for s in header:
fp.write(s)
flags = 0
try:
interlace = im.encoderinfo["interlace"]
except KeyError:
interlace = 1
# workaround for @PIL153
if min(im.size) < 16:
interlace = 0
if interlace:
flags = flags | 64
try:
transparency = im.encoderinfo["transparency"]
except KeyError:
pass
else:
transparency = int(transparency)
# optimize the block away if transparent color is not used
transparentColorExists = True
# adjust the transparency index after optimize
if usedPaletteColors is not None and len(usedPaletteColors) < 256:
for i in range(len(usedPaletteColors)):
if usedPaletteColors[i] == transparency:
transparency = i
transparentColorExists = True
break
else:
transparentColorExists = False
# transparency extension block
if transparentColorExists:
fp.write(
b"!"
+ o8(249)
+ o8(4) # extension intro
+ o8(1) # length
+ o16(0) # transparency info present
+ o8(transparency) # duration # transparency index
+ o8(0)
)
# local image header
fp.write(
b"," + o16(0) + o16(0) + o16(im.size[0]) + o16(im.size[1]) + o8(flags) + o8(8) # bounding box # size # flags
) # bits
imOut.encoderconfig = (8, interlace)
ImageFile._save(imOut, fp, [("gif", (0, 0) + im.size, 0, rawmode)])
fp.write(b"\0") # end of image data
fp.write(b";") # end of file
try:
fp.flush()
except:
pass
def _save(im, fp, filename):
try:
rawmode = RAWMODE[im.mode]
except KeyError:
raise IOError("cannot write mode %s as JPEG" % im.mode)
info = im.encoderinfo
dpi = info.get("dpi", (0, 0))
quality = info.get("quality", 0)
subsampling = info.get("subsampling", -1)
qtables = info.get("qtables")
if quality == "keep":
quality = 0
subsampling = "keep"
qtables = "keep"
elif quality in presets:
preset = presets[quality]
quality = 0
subsampling = preset.get("subsampling", -1)
qtables = preset.get("quantization")
elif not isinstance(quality, int):
raise ValueError("Invalid quality setting")
else:
if subsampling in presets:
subsampling = presets[subsampling].get("subsampling", -1)
if qtables in presets:
qtables = presets[qtables].get("quantization")
if subsampling == "4:4:4":
subsampling = 0
elif subsampling == "4:2:2":
subsampling = 1
elif subsampling == "4:1:1":
subsampling = 2
elif subsampling == "keep":
if im.format != "JPEG":
raise ValueError("Cannot use 'keep' when original image is not a JPEG")
subsampling = get_sampling(im)
def validate_qtables(qtables):
if qtables is None:
return qtables
if isStringType(qtables):
try:
lines = [int(num) for line in qtables.splitlines() for num in line.split("#", 1)[0].split()]
except ValueError:
raise ValueError("Invalid quantization table")
else:
qtables = [lines[s : s + 64] for s in xrange(0, len(lines), 64)]
if isinstance(qtables, (tuple, list, dict)):
if isinstance(qtables, dict):
qtables = convert_dict_qtables(qtables)
elif isinstance(qtables, tuple):
qtables = list(qtables)
if not (0 < len(qtables) < 5):
raise ValueError("None or too many quantization tables")
for idx, table in enumerate(qtables):
try:
if len(table) != 64:
raise
table = array.array("b", table)
except TypeError:
raise ValueError("Invalid quantization table")
else:
qtables[idx] = list(table)
return qtables
if qtables == "keep":
if im.format != "JPEG":
raise ValueError("Cannot use 'keep' when original image is not a JPEG")
qtables = getattr(im, "quantization", None)
qtables = validate_qtables(qtables)
extra = b""
icc_profile = info.get("icc_profile")
if icc_profile:
ICC_OVERHEAD_LEN = 14
MAX_BYTES_IN_MARKER = 65533
MAX_DATA_BYTES_IN_MARKER = MAX_BYTES_IN_MARKER - ICC_OVERHEAD_LEN
markers = []
while icc_profile:
markers.append(icc_profile[:MAX_DATA_BYTES_IN_MARKER])
icc_profile = icc_profile[MAX_DATA_BYTES_IN_MARKER:]
i = 1
for marker in markers:
size = struct.pack(">H", 2 + ICC_OVERHEAD_LEN + len(marker))
extra = extra + (b"\xFF\xE2" + size + b"ICC_PROFILE\0" + o8(i) + o8(len(markers)) + marker)
i = i + 1
# get keyword arguments
im.encoderconfig = (
quality,
# "progressive" is the official name, but older documentation
# says "progression"
# FIXME: issue a warning if the wrong form is used (post-1.1.7)
"progressive" in info or "progression" in info,
info.get("smooth", 0),
"optimize" in info,
info.get("streamtype", 0),
dpi[0],
dpi[1],
subsampling,
qtables,
extra,
info.get("exif", b""),
)
# if we optimize, libjpeg needs a buffer big enough to hold the whole image in a shot.
# Guessing on the size, at im.size bytes. (raw pizel size is channels*size, this
# is a value that's been used in a django patch.
# https://github.com/jdriscoll/django-imagekit/issues/50
bufsize = 0
if "optimize" in info or "progressive" in info or "progression" in info:
if quality >= 95:
bufsize = 2 * im.size[0] * im.size[1]
else:
bufsize = im.size[0] * im.size[1]
# The exif info needs to be written as one block, + APP1, + one spare byte.
# Ensure that our buffer is big enough
bufsize = max(ImageFile.MAXBLOCK, bufsize, len(info.get("exif", b"")) + 5)
ImageFile._save(im, fp, [("jpeg", (0, 0) + im.size, 0, rawmode)], bufsize)
def _save(im, fp, filename, chunk=putchunk, check=0):
# save an image to disk (called by the save method)
mode = im.mode
if mode == "P":
#
# attempt to minimize storage requirements for palette images
if "bits" in im.encoderinfo:
# number of bits specified by user
colors = 1 << im.encoderinfo["bits"]
else:
# check palette contents
if im.palette:
colors = max(min(len(im.palette.getdata()[1]) // 3, 256), 2)
else:
colors = 256
if colors <= 2:
bits = 1
elif colors <= 4:
bits = 2
elif colors <= 16:
bits = 4
else:
bits = 8
if bits != 8:
mode = "%s;%d" % (mode, bits)
# encoder options
if "dictionary" in im.encoderinfo:
dictionary = im.encoderinfo["dictionary"]
else:
dictionary = b""
im.encoderconfig = (
"optimize" in im.encoderinfo,
im.encoderinfo.get("compress_level", -1),
im.encoderinfo.get("compress_type", -1),
dictionary,
)
# get the corresponding PNG mode
try:
rawmode, mode = _OUTMODES[mode]
except KeyError:
raise IOError("cannot write mode %s as PNG" % mode)
if check:
return check
#
# write minimal PNG file
fp.write(_MAGIC)
chunk(
fp,
b"IHDR",
o32(im.size[0]),
o32(im.size[1]), # 0: size
mode, # 8: depth/type
b"\0", # 10: compression
b"\0", # 11: filter category
b"\0",
) # 12: interlace flag
if im.mode == "P":
palette_byte_number = (2 ** bits) * 3
palette_bytes = im.im.getpalette("RGB")[:palette_byte_number]
while len(palette_bytes) < palette_byte_number:
palette_bytes += b"\0"
chunk(fp, b"PLTE", palette_bytes)
transparency = im.encoderinfo.get("transparency", im.info.get("transparency", None))
if transparency or transparency == 0:
if im.mode == "P":
# limit to actual palette size
alpha_bytes = 2 ** bits
if isinstance(transparency, bytes):
chunk(fp, b"tRNS", transparency[:alpha_bytes])
else:
transparency = max(0, min(255, transparency))
alpha = b"\xFF" * transparency + b"\0"
chunk(fp, b"tRNS", alpha[:alpha_bytes])
elif im.mode == "L":
transparency = max(0, min(65535, transparency))
chunk(fp, b"tRNS", o16(transparency))
elif im.mode == "RGB":
red, green, blue = transparency
chunk(fp, b"tRNS", o16(red) + o16(green) + o16(blue))
else:
if "transparency" in im.encoderinfo:
# don't bother with transparency if it's an RGBA
# and it's in the info dict. It's probably just stale.
raise IOError("cannot use transparency for this mode")
else:
if im.mode == "P" and im.im.getpalettemode() == "RGBA":
alpha = im.im.getpalette("RGBA", "A")
alpha_bytes = 2 ** bits
chunk(fp, b"tRNS", alpha[:alpha_bytes])
dpi = im.encoderinfo.get("dpi")
if dpi:
chunk(fp, b"pHYs", o32(int(dpi[0] / 0.0254 + 0.5)), o32(int(dpi[1] / 0.0254 + 0.5)), b"\x01")
info = im.encoderinfo.get("pnginfo")
if info:
for cid, data in info.chunks:
chunk(fp, cid, data)
# ICC profile writing support -- 2008-06-06 Florian Hoech
if im.info.get("icc_profile"):
# ICC profile
# according to PNG spec, the iCCP chunk contains:
# Profile name 1-79 bytes (character string)
# Null separator 1 byte (null character)
# Compression method 1 byte (0)
# Compressed profile n bytes (zlib with deflate compression)
name = b"ICC Profile"
data = name + b"\0\0" + zlib.compress(im.info["icc_profile"])
chunk(fp, b"iCCP", data)
ImageFile._save(im, _idat(fp, chunk), [("zip", (0, 0) + im.size, 0, rawmode)])
chunk(fp, b"IEND", b"")
if hasattr(fp, "flush"):
fp.flush()
def _save(im, fp, filename):
try:
rawmode, prefix, photo, format, bits, extra = SAVE_INFO[im.mode]
except KeyError:
raise IOError("cannot write mode %s as TIFF" % im.mode)
ifd = ImageFileDirectory(prefix)
compression = im.encoderinfo.get('compression',
im.info.get('compression', 'raw'))
libtiff = WRITE_LIBTIFF or compression != 'raw'
# required for color libtiff images
ifd[PLANAR_CONFIGURATION] = getattr(im, '_planar_configuration', 1)
# -- multi-page -- skip TIFF header on subsequent pages
if not libtiff and fp.tell() == 0:
# tiff header (write via IFD to get everything right)
# PIL always starts the first IFD at offset 8
fp.write(ifd.prefix + ifd.o16(42) + ifd.o32(8))
ifd[IMAGEWIDTH] = im.size[0]
ifd[IMAGELENGTH] = im.size[1]
# write any arbitrary tags passed in as an ImageFileDirectory
info = im.encoderinfo.get("tiffinfo", {})
if Image.DEBUG:
print("Tiffinfo Keys: %s" % info.keys)
keys = list(info.keys())
for key in keys:
ifd[key] = info.get(key)
try:
ifd.tagtype[key] = info.tagtype[key]
except:
pass # might not be an IFD, Might not have populated type
# additions written by Greg Couch, [email protected]
# inspired by image-sig posting from Kevin Cazabon, [email protected]
if hasattr(im, 'tag'):
# preserve tags from original TIFF image file
for key in (RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION,
IPTC_NAA_CHUNK, PHOTOSHOP_CHUNK, XMP):
if key in im.tag:
ifd[key] = im.tag[key]
ifd.tagtype[key] = im.tag.tagtype.get(key, None)
# preserve ICC profile (should also work when saving other formats
# which support profiles as TIFF) -- 2008-06-06 Florian Hoech
if "icc_profile" in im.info:
ifd[ICCPROFILE] = im.info["icc_profile"]
if "description" in im.encoderinfo:
ifd[IMAGEDESCRIPTION] = im.encoderinfo["description"]
if "resolution" in im.encoderinfo:
ifd[X_RESOLUTION] = ifd[Y_RESOLUTION] \
= _cvt_res(im.encoderinfo["resolution"])
if "x resolution" in im.encoderinfo:
ifd[X_RESOLUTION] = _cvt_res(im.encoderinfo["x resolution"])
if "y resolution" in im.encoderinfo:
ifd[Y_RESOLUTION] = _cvt_res(im.encoderinfo["y resolution"])
if "resolution unit" in im.encoderinfo:
unit = im.encoderinfo["resolution unit"]
if unit == "inch":
ifd[RESOLUTION_UNIT] = 2
elif unit == "cm" or unit == "centimeter":
ifd[RESOLUTION_UNIT] = 3
else:
ifd[RESOLUTION_UNIT] = 1
if "software" in im.encoderinfo:
ifd[SOFTWARE] = im.encoderinfo["software"]
if "date time" in im.encoderinfo:
ifd[DATE_TIME] = im.encoderinfo["date time"]
if "artist" in im.encoderinfo:
ifd[ARTIST] = im.encoderinfo["artist"]
if "copyright" in im.encoderinfo:
ifd[COPYRIGHT] = im.encoderinfo["copyright"]
dpi = im.encoderinfo.get("dpi")
if dpi:
ifd[RESOLUTION_UNIT] = 2
ifd[X_RESOLUTION] = _cvt_res(dpi[0])
ifd[Y_RESOLUTION] = _cvt_res(dpi[1])
if bits != (1, ):
ifd[BITSPERSAMPLE] = bits
if len(bits) != 1:
ifd[SAMPLESPERPIXEL] = len(bits)
if extra is not None:
ifd[EXTRASAMPLES] = extra
if format != 1:
ifd[SAMPLEFORMAT] = format
ifd[PHOTOMETRIC_INTERPRETATION] = photo
if im.mode == "P":
lut = im.im.getpalette("RGB", "RGB;L")
ifd[COLORMAP] = tuple(i8(v) * 256 for v in lut)
# data orientation
stride = len(bits) * ((im.size[0] * bits[0] + 7) // 8)
ifd[ROWSPERSTRIP] = im.size[1]
ifd[STRIPBYTECOUNTS] = stride * im.size[1]
ifd[STRIPOFFSETS] = 0 # this is adjusted by IFD writer
# no compression by default:
ifd[COMPRESSION] = COMPRESSION_INFO_REV.get(compression, 1)
if libtiff:
if Image.DEBUG:
print("Saving using libtiff encoder")
print(ifd.items())
_fp = 0
if hasattr(fp, "fileno"):
fp.seek(0)
_fp = os.dup(fp.fileno())
# ICC Profile crashes.
blocklist = [STRIPOFFSETS, STRIPBYTECOUNTS, ROWSPERSTRIP, ICCPROFILE]
atts = {}
# bits per sample is a single short in the tiff directory, not a list.
atts[BITSPERSAMPLE] = bits[0]
# Merge the ones that we have with (optional) more bits from
# the original file, e.g x,y resolution so that we can
# save(load('')) == original file.
for k, v in itertools.chain(ifd.items(),
getattr(im, 'ifd', {}).items()):
if k not in atts and k not in blocklist:
if type(v[0]) == tuple and len(v) > 1:
# A tuple of more than one rational tuples
# flatten to floats,
# following tiffcp.c->cpTag->TIFF_RATIONAL
atts[k] = [float(elt[0]) / float(elt[1]) for elt in v]
continue
if type(v[0]) == tuple and len(v) == 1:
# A tuple of one rational tuples
# flatten to floats,
# following tiffcp.c->cpTag->TIFF_RATIONAL
atts[k] = float(v[0][0]) / float(v[0][1])
continue
if type(v) == tuple and len(v) > 2:
# List of ints?
if type(v[0]) in (int, float):
atts[k] = list(v)
continue
if type(v) == tuple and len(v) == 2:
# one rational tuple
# flatten to float,
# following tiffcp.c->cpTag->TIFF_RATIONAL
atts[k] = float(v[0]) / float(v[1])
continue
if type(v) == tuple and len(v) == 1:
v = v[0]
# drop through
if isStringType(v):
atts[k] = bytes(v.encode('ascii', 'replace')) + b"\0"
continue
else:
# int or similar
atts[k] = v
if Image.DEBUG:
print(atts)
# libtiff always expects the bytes in native order.
# we're storing image byte order. So, if the rawmode
# contains I;16, we need to convert from native to image
# byte order.
if im.mode in ('I;16B', 'I;16'):
rawmode = 'I;16N'
a = (rawmode, compression, _fp, filename, atts)
# print (im.mode, compression, a, im.encoderconfig)
e = Image._getencoder(im.mode, 'libtiff', a, im.encoderconfig)
e.setimage(im.im, (0, 0) + im.size)
while True:
# undone, change to self.decodermaxblock:
l, s, d = e.encode(16 * 1024)
if not _fp:
fp.write(d)
if s:
break
if s < 0:
raise IOError("encoder error %d when writing image file" % s)
else:
offset = ifd.save(fp)
ImageFile._save(im, fp, [("raw", (0, 0) + im.size, offset,
(rawmode, stride, 1))])
# -- helper for multi-page save --
if "_debug_multipage" in im.encoderinfo:
# just to access o32 and o16 (using correct byte order)
im._debug_multipage = ifd
def _save(im, fp, filename):
try:
rawmode, prefix, photo, format, bits, extra = SAVE_INFO[im.mode]
except KeyError:
raise IOError("cannot write mode %s as TIFF" % im.mode)
ifd = ImageFileDirectory_v2(prefix=prefix)
compression = im.encoderinfo.get('compression',
im.info.get('compression', 'raw'))
libtiff = WRITE_LIBTIFF or compression != 'raw'
# required for color libtiff images
ifd[PLANAR_CONFIGURATION] = getattr(im, '_planar_configuration', 1)
ifd[IMAGEWIDTH] = im.size[0]
ifd[IMAGELENGTH] = im.size[1]
# write any arbitrary tags passed in as an ImageFileDirectory
info = im.encoderinfo.get("tiffinfo", {})
if DEBUG:
print("Tiffinfo Keys: %s" % list(info))
if isinstance(info, ImageFileDirectory_v1):
info = info.to_v2()
for key in info:
ifd[key] = info.get(key)
try:
ifd.tagtype[key] = info.tagtype[key]
except:
pass # might not be an IFD, Might not have populated type
# additions written by Greg Couch, [email protected]
# inspired by image-sig posting from Kevin Cazabon, [email protected]
if hasattr(im, 'tag_v2'):
# preserve tags from original TIFF image file
for key in (RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION,
IPTC_NAA_CHUNK, PHOTOSHOP_CHUNK, XMP):
if key in im.tag_v2:
ifd[key] = im.tag_v2[key]
ifd.tagtype[key] = im.tag_v2.tagtype.get(key, None)
# preserve ICC profile (should also work when saving other formats
# which support profiles as TIFF) -- 2008-06-06 Florian Hoech
if "icc_profile" in im.info:
ifd[ICCPROFILE] = im.info["icc_profile"]
for key, name in [(IMAGEDESCRIPTION, "description"),
(X_RESOLUTION, "resolution"),
(Y_RESOLUTION, "resolution"),
(X_RESOLUTION, "x_resolution"),
(Y_RESOLUTION, "y_resolution"),
(RESOLUTION_UNIT, "resolution_unit"),
(SOFTWARE, "software"), (DATE_TIME, "date_time"),
(ARTIST, "artist"), (COPYRIGHT, "copyright")]:
name_with_spaces = name.replace("_", " ")
if "_" in name and name_with_spaces in im.encoderinfo:
warnings.warn(
"%r is deprecated; use %r instead" % (name_with_spaces, name),
DeprecationWarning)
ifd[key] = im.encoderinfo[name.replace("_", " ")]
if name in im.encoderinfo:
ifd[key] = im.encoderinfo[name]
dpi = im.encoderinfo.get("dpi")
if dpi:
ifd[RESOLUTION_UNIT] = 2
ifd[X_RESOLUTION] = dpi[0]
ifd[Y_RESOLUTION] = dpi[1]
if bits != (1, ):
ifd[BITSPERSAMPLE] = bits
if len(bits) != 1:
ifd[SAMPLESPERPIXEL] = len(bits)
if extra is not None:
ifd[EXTRASAMPLES] = extra
if format != 1:
ifd[SAMPLEFORMAT] = format
ifd[PHOTOMETRIC_INTERPRETATION] = photo
if im.mode == "P":
lut = im.im.getpalette("RGB", "RGB;L")
ifd[COLORMAP] = tuple(i8(v) * 256 for v in lut)
# data orientation
stride = len(bits) * ((im.size[0] * bits[0] + 7) // 8)
ifd[ROWSPERSTRIP] = im.size[1]
ifd[STRIPBYTECOUNTS] = stride * im.size[1]
ifd[STRIPOFFSETS] = 0 # this is adjusted by IFD writer
# no compression by default:
ifd[COMPRESSION] = COMPRESSION_INFO_REV.get(compression, 1)
if libtiff:
if DEBUG:
print("Saving using libtiff encoder")
print("Items: %s" % sorted(ifd.items()))
_fp = 0
if hasattr(fp, "fileno"):
try:
fp.seek(0)
_fp = os.dup(fp.fileno())
except io.UnsupportedOperation:
pass
# ICC Profile crashes.
blocklist = [STRIPOFFSETS, STRIPBYTECOUNTS, ROWSPERSTRIP, ICCPROFILE]
atts = {}
# bits per sample is a single short in the tiff directory, not a list.
atts[BITSPERSAMPLE] = bits[0]
# Merge the ones that we have with (optional) more bits from
# the original file, e.g x,y resolution so that we can
# save(load('')) == original file.
legacy_ifd = {}
if hasattr(im, 'tag'):
legacy_ifd = im.tag.to_v2()
for k, v in itertools.chain(ifd.items(),
getattr(im, 'tag_v2', {}).items(),
legacy_ifd.items()):
if k not in atts and k not in blocklist:
if isinstance(v, unicode if bytes is str else str):
atts[k] = v.encode('ascii', 'replace') + b"\0"
else:
atts[k] = v
if DEBUG:
print("Converted items: %s" % sorted(atts.items()))
# libtiff always expects the bytes in native order.
# we're storing image byte order. So, if the rawmode
# contains I;16, we need to convert from native to image
# byte order.
if im.mode in ('I;16B', 'I;16'):
rawmode = 'I;16N'
a = (rawmode, compression, _fp, filename, atts)
# print(im.mode, compression, a, im.encoderconfig)
e = Image._getencoder(im.mode, 'libtiff', a, im.encoderconfig)
e.setimage(im.im, (0, 0) + im.size)
while True:
# undone, change to self.decodermaxblock:
l, s, d = e.encode(16 * 1024)
if not _fp:
fp.write(d)
if s:
break
if s < 0:
raise IOError("encoder error %d when writing image file" % s)
else:
offset = ifd.save(fp)
ImageFile._save(im, fp, [("raw", (0, 0) + im.size, offset,
(rawmode, stride, 1))])
# -- helper for multi-page save --
if "_debug_multipage" in im.encoderinfo:
# just to access o32 and o16 (using correct byte order)
im._debug_multipage = ifd
def _save(im, fp, filename):
try:
rawmode, prefix, photo, format, bits, extra = SAVE_INFO[im.mode]
except KeyError:
raise IOError("cannot write mode %s as TIFF" % im.mode)
ifd = ImageFileDirectory(prefix)
compression = im.info.get('compression', 'raw')
libtiff = compression in [
"tiff_ccitt", "group3", "group4", "tiff_jpeg", "tiff_adobe_deflate",
"tiff_thunderscan", "tiff_deflate", "tiff_sgilog", "tiff_sgilog24",
"tiff_raw_16"
]
# -- multi-page -- skip TIFF header on subsequent pages
if not libtiff and fp.tell() == 0:
# tiff header (write via IFD to get everything right)
# PIL always starts the first IFD at offset 8
fp.write(ifd.prefix + ifd.o16(42) + ifd.o32(8))
ifd[IMAGEWIDTH] = im.size[0]
ifd[IMAGELENGTH] = im.size[1]
# additions written by Greg Couch, [email protected]
# inspired by image-sig posting from Kevin Cazabon, [email protected]
if hasattr(im, 'tag'):
# preserve tags from original TIFF image file
for key in (RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION):
if key in im.tag.tagdata:
ifd[key] = im.tag.tagdata.get(key)
# preserve some more tags from original TIFF image file
# -- 2008-06-06 Florian Hoech
ifd.tagtype = im.tag.tagtype
for key in (IPTC_NAA_CHUNK, PHOTOSHOP_CHUNK, XMP):
if key in im.tag:
ifd[key] = im.tag[key]
# preserve ICC profile (should also work when saving other formats
# which support profiles as TIFF) -- 2008-06-06 Florian Hoech
if "icc_profile" in im.info:
ifd[ICCPROFILE] = im.info["icc_profile"]
if "description" in im.encoderinfo:
ifd[IMAGEDESCRIPTION] = im.encoderinfo["description"]
if "resolution" in im.encoderinfo:
ifd[X_RESOLUTION] = ifd[Y_RESOLUTION] \
= _cvt_res(im.encoderinfo["resolution"])
if "x resolution" in im.encoderinfo:
ifd[X_RESOLUTION] = _cvt_res(im.encoderinfo["x resolution"])
if "y resolution" in im.encoderinfo:
ifd[Y_RESOLUTION] = _cvt_res(im.encoderinfo["y resolution"])
if "resolution unit" in im.encoderinfo:
unit = im.encoderinfo["resolution unit"]
if unit == "inch":
ifd[RESOLUTION_UNIT] = 2
elif unit == "cm" or unit == "centimeter":
ifd[RESOLUTION_UNIT] = 3
else:
ifd[RESOLUTION_UNIT] = 1
if "software" in im.encoderinfo:
ifd[SOFTWARE] = im.encoderinfo["software"]
if "date time" in im.encoderinfo:
ifd[DATE_TIME] = im.encoderinfo["date time"]
if "artist" in im.encoderinfo:
ifd[ARTIST] = im.encoderinfo["artist"]
if "copyright" in im.encoderinfo:
ifd[COPYRIGHT] = im.encoderinfo["copyright"]
dpi = im.encoderinfo.get("dpi")
if dpi:
ifd[RESOLUTION_UNIT] = 2
ifd[X_RESOLUTION] = _cvt_res(dpi[0])
ifd[Y_RESOLUTION] = _cvt_res(dpi[1])
if bits != (1, ):
ifd[BITSPERSAMPLE] = bits
if len(bits) != 1:
ifd[SAMPLESPERPIXEL] = len(bits)
if extra is not None:
ifd[EXTRASAMPLES] = extra
if format != 1:
ifd[SAMPLEFORMAT] = format
ifd[PHOTOMETRIC_INTERPRETATION] = photo
if im.mode == "P":
lut = im.im.getpalette("RGB", "RGB;L")
ifd[COLORMAP] = tuple(i8(v) * 256 for v in lut)
# data orientation
stride = len(bits) * ((im.size[0] * bits[0] + 7) // 8)
ifd[ROWSPERSTRIP] = im.size[1]
ifd[STRIPBYTECOUNTS] = stride * im.size[1]
ifd[STRIPOFFSETS] = 0 # this is adjusted by IFD writer
ifd[COMPRESSION] = COMPRESSION_INFO_REV.get(compression,
1) # no compression by default
if libtiff:
if Image.DEBUG:
print("Saving using libtiff encoder")
print(ifd.items())
_fp = 0
if hasattr(fp, "fileno"):
fp.seek(0)
_fp = os.dup(fp.fileno())
blocklist = [STRIPOFFSETS, STRIPBYTECOUNTS, ROWSPERSTRIP,
ICCPROFILE] # ICC Profile crashes.
atts = dict([(k, v) for (k, (v, )) in ifd.items()
if k not in blocklist])
try:
# pull in more bits from the original file, e.g x,y resolution
# so that we can save(load('')) == original file.
for k, v in im.ifd.items():
if k not in atts and k not in blocklist:
if type(v[0]) == tuple and len(v) > 1:
# A tuple of more than one rational tuples
# flatten to floats, following tiffcp.c->cpTag->TIFF_RATIONAL
atts[k] = [float(elt[0]) / float(elt[1]) for elt in v]
continue
if type(v[0]) == tuple and len(v) == 1:
# A tuple of one rational tuples
# flatten to floats, following tiffcp.c->cpTag->TIFF_RATIONAL
atts[k] = float(v[0][0]) / float(v[0][1])
continue
if type(v) == tuple and len(v) == 1:
# int or similar
atts[k] = v[0]
continue
if type(v) == str:
atts[k] = v
continue
except:
# if we don't have an ifd here, just punt.
pass
if Image.DEBUG:
print(atts)
a = (rawmode, compression, _fp, filename, atts)
e = Image._getencoder(im.mode, compression, a, im.encoderconfig)
e.setimage(im.im, (0, 0) + im.size)
while 1:
l, s, d = e.encode(16 *
1024) # undone, change to self.decodermaxblock
if not _fp:
fp.write(d)
if s:
break
if s < 0:
raise IOError("encoder error %d when writing image file" % s)
else:
offset = ifd.save(fp)
ImageFile._save(im, fp, [("raw", (0, 0) + im.size, offset,
(rawmode, stride, 1))])
# -- helper for multi-page save --
if "_debug_multipage" in im.encoderinfo:
#just to access o32 and o16 (using correct byte order)
im._debug_multipage = ifd
def _save(im, fp, filename, check=0):
try:
rawmode, bits, colors = SAVE[im.mode]
except KeyError:
raise IOError("cannot write mode %s as BMP" % im.mode)
if check:
return check
info = im.encoderinfo
dpi = info.get("dpi", (96, 96))
# 1 meter == 39.3701 inches
ppm = tuple(map(lambda x: int(x * 39.3701), dpi))
stride = ((im.size[0]*bits+7)//8+3) & (~3)
header = 108 if im.mode == 'RGBA' else 40 # or 64 for OS/2 version 2
offset = 14 + header + colors*4
image = stride * im.size[1]
red_mask = 0x00ff0000
green_mask = 0x0000ff00
blue_mask = 0x000000ff
alpha_mask = 0xff000000
# bitmap header
fp.write(b"BM" + # file type (magic)
o32(offset+image+16) + # file size
o32(0) + # reserved
o32(offset+16)) # image data offset
width,height = im.size
# bitmap info header
fp.write(o32(header+16) + # info header size
o32(width) + # width
o32(height) + # height
o16(1) + # planes
o16(bits) + # depth
o32(3) + # compression (0=uncompressed)
o32(image) + # size of bitmap
o32(ppm[0]) + o32(ppm[1]) + # resolution
o32(colors) + # colors used
o32(colors) # colors important
#o32(red_mask) + # red channel ma
#o32(green_mask) + # green channel mask
#o32(blue_mask) + # blue channel mask
#o32(alpha_mask)
)
# This was commented out because although it works, some
# decoders do not support images with a BI_BITFIELDS compression
#
if im.mode == 'RGBA':
fp.write(o32(red_mask) + # red channel mask
o32(green_mask) + # green channel mask
o32(blue_mask) + # blue channel mask
o32(alpha_mask) + # alpha channel mask
'BGRs' + # Color Space
o8(0)*0x24 + # ciexyztriple color space endpoints
o32(0) + # red gamma
o32(0) + # green gamma
o32(0) # blue gamma
)
fp.write(bytearray(16))
if im.mode == "1":
for i in (0, 255):
fp.write(o8(i) * 4)
elif im.mode == "L":
for i in range(256):
fp.write(o8(i) * 4)
elif im.mode == "P":
fp.write(im.im.getpalette("RGB", "BGRX"))
#fp.write(
ImageFile._save(im, fp, [("raw", (0, 0)+im.size, 0,
(rawmode, stride, -1))])
def _save(im, fp, filename, check=0):
if im.mode == "P":
# we assume this is a color Palm image with the standard colormap,
# unless the "info" dict has a "custom-colormap" field
rawmode = "P"
bpp = 8
version = 1
elif (im.mode == "L" and
"bpp" in im.encoderinfo and
im.encoderinfo["bpp"] in (1, 2, 4)):
# this is 8-bit grayscale, so we shift it to get the high-order bits,
# and invert it because
# Palm does greyscale from white (0) to black (1)
bpp = im.encoderinfo["bpp"]
im = im.point(
lambda x, shift=8-bpp, maxval=(1 << bpp)-1: maxval - (x >> shift))
# we ignore the palette here
im.mode = "P"
rawmode = "P;" + str(bpp)
version = 1
elif im.mode == "L" and "bpp" in im.info and im.info["bpp"] in (1, 2, 4):
# here we assume that even though the inherent mode is 8-bit grayscale,
# only the lower bpp bits are significant.
# We invert them to match the Palm.
bpp = im.info["bpp"]
im = im.point(lambda x, maxval=(1 << bpp)-1: maxval - (x & maxval))
# we ignore the palette here
im.mode = "P"
rawmode = "P;" + str(bpp)
version = 1
elif im.mode == "1":
# monochrome -- write it inverted, as is the Palm standard
rawmode = "1;I"
bpp = 1
version = 0
else:
raise IOError("cannot write mode %s as Palm" % im.mode)
if check:
return check
#
# make sure image data is available
im.load()
# write header
cols = im.size[0]
rows = im.size[1]
rowbytes = int((cols + (16//bpp - 1)) / (16 // bpp)) * 2
transparent_index = 0
compression_type = _COMPRESSION_TYPES["none"]
flags = 0
if im.mode == "P" and "custom-colormap" in im.info:
flags = flags & _FLAGS["custom-colormap"]
colormapsize = 4 * 256 + 2
colormapmode = im.palette.mode
colormap = im.getdata().getpalette()
else:
colormapsize = 0
if "offset" in im.info:
offset = (rowbytes * rows + 16 + 3 + colormapsize) // 4
else:
offset = 0
fp.write(o16b(cols) + o16b(rows) + o16b(rowbytes) + o16b(flags))
fp.write(o8(bpp))
fp.write(o8(version))
fp.write(o16b(offset))
fp.write(o8(transparent_index))
fp.write(o8(compression_type))
fp.write(o16b(0)) # reserved by Palm
# now write colormap if necessary
if colormapsize > 0:
fp.write(o16b(256))
for i in range(256):
fp.write(o8(i))
if colormapmode == 'RGB':
fp.write(
o8(colormap[3 * i]) +
o8(colormap[3 * i + 1]) +
o8(colormap[3 * i + 2]))
elif colormapmode == 'RGBA':
fp.write(
o8(colormap[4 * i]) +
o8(colormap[4 * i + 1]) +
o8(colormap[4 * i + 2]))
# now convert data to raw form
ImageFile._save(
im, fp, [("raw", (0, 0)+im.size, 0, (rawmode, rowbytes, 1))])
fp.flush()
