You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
228 lines
8.9 KiB
228 lines
8.9 KiB
#
|
|
# The Python Imaging Library.
|
|
# $Id$
|
|
#
|
|
|
|
##
|
|
# Image plugin for Palm pixmap images (output only).
|
|
##
|
|
|
|
from . import Image, ImageFile
|
|
from ._binary import o8
|
|
from ._binary import o16be as o16b
|
|
|
|
# fmt: off
|
|
_Palm8BitColormapValues = (
|
|
(255, 255, 255), (255, 204, 255), (255, 153, 255), (255, 102, 255),
|
|
(255, 51, 255), (255, 0, 255), (255, 255, 204), (255, 204, 204),
|
|
(255, 153, 204), (255, 102, 204), (255, 51, 204), (255, 0, 204),
|
|
(255, 255, 153), (255, 204, 153), (255, 153, 153), (255, 102, 153),
|
|
(255, 51, 153), (255, 0, 153), (204, 255, 255), (204, 204, 255),
|
|
(204, 153, 255), (204, 102, 255), (204, 51, 255), (204, 0, 255),
|
|
(204, 255, 204), (204, 204, 204), (204, 153, 204), (204, 102, 204),
|
|
(204, 51, 204), (204, 0, 204), (204, 255, 153), (204, 204, 153),
|
|
(204, 153, 153), (204, 102, 153), (204, 51, 153), (204, 0, 153),
|
|
(153, 255, 255), (153, 204, 255), (153, 153, 255), (153, 102, 255),
|
|
(153, 51, 255), (153, 0, 255), (153, 255, 204), (153, 204, 204),
|
|
(153, 153, 204), (153, 102, 204), (153, 51, 204), (153, 0, 204),
|
|
(153, 255, 153), (153, 204, 153), (153, 153, 153), (153, 102, 153),
|
|
(153, 51, 153), (153, 0, 153), (102, 255, 255), (102, 204, 255),
|
|
(102, 153, 255), (102, 102, 255), (102, 51, 255), (102, 0, 255),
|
|
(102, 255, 204), (102, 204, 204), (102, 153, 204), (102, 102, 204),
|
|
(102, 51, 204), (102, 0, 204), (102, 255, 153), (102, 204, 153),
|
|
(102, 153, 153), (102, 102, 153), (102, 51, 153), (102, 0, 153),
|
|
(51, 255, 255), (51, 204, 255), (51, 153, 255), (51, 102, 255),
|
|
(51, 51, 255), (51, 0, 255), (51, 255, 204), (51, 204, 204),
|
|
(51, 153, 204), (51, 102, 204), (51, 51, 204), (51, 0, 204),
|
|
(51, 255, 153), (51, 204, 153), (51, 153, 153), (51, 102, 153),
|
|
(51, 51, 153), (51, 0, 153), (0, 255, 255), (0, 204, 255),
|
|
(0, 153, 255), (0, 102, 255), (0, 51, 255), (0, 0, 255),
|
|
(0, 255, 204), (0, 204, 204), (0, 153, 204), (0, 102, 204),
|
|
(0, 51, 204), (0, 0, 204), (0, 255, 153), (0, 204, 153),
|
|
(0, 153, 153), (0, 102, 153), (0, 51, 153), (0, 0, 153),
|
|
(255, 255, 102), (255, 204, 102), (255, 153, 102), (255, 102, 102),
|
|
(255, 51, 102), (255, 0, 102), (255, 255, 51), (255, 204, 51),
|
|
(255, 153, 51), (255, 102, 51), (255, 51, 51), (255, 0, 51),
|
|
(255, 255, 0), (255, 204, 0), (255, 153, 0), (255, 102, 0),
|
|
(255, 51, 0), (255, 0, 0), (204, 255, 102), (204, 204, 102),
|
|
(204, 153, 102), (204, 102, 102), (204, 51, 102), (204, 0, 102),
|
|
(204, 255, 51), (204, 204, 51), (204, 153, 51), (204, 102, 51),
|
|
(204, 51, 51), (204, 0, 51), (204, 255, 0), (204, 204, 0),
|
|
(204, 153, 0), (204, 102, 0), (204, 51, 0), (204, 0, 0),
|
|
(153, 255, 102), (153, 204, 102), (153, 153, 102), (153, 102, 102),
|
|
(153, 51, 102), (153, 0, 102), (153, 255, 51), (153, 204, 51),
|
|
(153, 153, 51), (153, 102, 51), (153, 51, 51), (153, 0, 51),
|
|
(153, 255, 0), (153, 204, 0), (153, 153, 0), (153, 102, 0),
|
|
(153, 51, 0), (153, 0, 0), (102, 255, 102), (102, 204, 102),
|
|
(102, 153, 102), (102, 102, 102), (102, 51, 102), (102, 0, 102),
|
|
(102, 255, 51), (102, 204, 51), (102, 153, 51), (102, 102, 51),
|
|
(102, 51, 51), (102, 0, 51), (102, 255, 0), (102, 204, 0),
|
|
(102, 153, 0), (102, 102, 0), (102, 51, 0), (102, 0, 0),
|
|
(51, 255, 102), (51, 204, 102), (51, 153, 102), (51, 102, 102),
|
|
(51, 51, 102), (51, 0, 102), (51, 255, 51), (51, 204, 51),
|
|
(51, 153, 51), (51, 102, 51), (51, 51, 51), (51, 0, 51),
|
|
(51, 255, 0), (51, 204, 0), (51, 153, 0), (51, 102, 0),
|
|
(51, 51, 0), (51, 0, 0), (0, 255, 102), (0, 204, 102),
|
|
(0, 153, 102), (0, 102, 102), (0, 51, 102), (0, 0, 102),
|
|
(0, 255, 51), (0, 204, 51), (0, 153, 51), (0, 102, 51),
|
|
(0, 51, 51), (0, 0, 51), (0, 255, 0), (0, 204, 0),
|
|
(0, 153, 0), (0, 102, 0), (0, 51, 0), (17, 17, 17),
|
|
(34, 34, 34), (68, 68, 68), (85, 85, 85), (119, 119, 119),
|
|
(136, 136, 136), (170, 170, 170), (187, 187, 187), (221, 221, 221),
|
|
(238, 238, 238), (192, 192, 192), (128, 0, 0), (128, 0, 128),
|
|
(0, 128, 0), (0, 128, 128), (0, 0, 0), (0, 0, 0),
|
|
(0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0),
|
|
(0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0),
|
|
(0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0),
|
|
(0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0),
|
|
(0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0),
|
|
(0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0))
|
|
# fmt: on
|
|
|
|
|
|
# so build a prototype image to be used for palette resampling
|
|
def build_prototype_image():
|
|
image = Image.new("L", (1, len(_Palm8BitColormapValues)))
|
|
image.putdata(list(range(len(_Palm8BitColormapValues))))
|
|
palettedata = ()
|
|
for colormapValue in _Palm8BitColormapValues:
|
|
palettedata += colormapValue
|
|
palettedata += (0, 0, 0) * (256 - len(_Palm8BitColormapValues))
|
|
image.putpalette(palettedata)
|
|
return image
|
|
|
|
|
|
Palm8BitColormapImage = build_prototype_image()
|
|
|
|
# OK, we now have in Palm8BitColormapImage,
|
|
# a "P"-mode image with the right palette
|
|
#
|
|
# --------------------------------------------------------------------
|
|
|
|
_FLAGS = {"custom-colormap": 0x4000, "is-compressed": 0x8000, "has-transparent": 0x2000}
|
|
|
|
_COMPRESSION_TYPES = {"none": 0xFF, "rle": 0x01, "scanline": 0x00}
|
|
|
|
|
|
#
|
|
# --------------------------------------------------------------------
|
|
|
|
##
|
|
# (Internal) Image save plugin for the Palm format.
|
|
|
|
|
|
def _save(im, fp, filename):
|
|
|
|
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":
|
|
if im.encoderinfo.get("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)
|
|
)
|
|
elif im.info.get("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))
|
|
else:
|
|
raise OSError(f"cannot write mode {im.mode} as Palm")
|
|
|
|
# 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 OSError(f"cannot write mode {im.mode} as Palm")
|
|
|
|
#
|
|
# 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))])
|
|
|
|
if hasattr(fp, "flush"):
|
|
fp.flush()
|
|
|
|
|
|
#
|
|
# --------------------------------------------------------------------
|
|
|
|
Image.register_save("Palm", _save)
|
|
|
|
Image.register_extension("Palm", ".palm")
|
|
|
|
Image.register_mime("Palm", "image/palm")
|