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-rw-r--r--lib/Python/Lib/PIL/PalmImagePlugin.py240
1 files changed, 240 insertions, 0 deletions
diff --git a/lib/Python/Lib/PIL/PalmImagePlugin.py b/lib/Python/Lib/PIL/PalmImagePlugin.py
new file mode 100644
index 000000000..bba1de8bb
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+++ b/lib/Python/Lib/PIL/PalmImagePlugin.py
@@ -0,0 +1,240 @@
+#
+# The Python Imaging Library.
+# $Id$
+#
+
+##
+# Image plugin for Palm pixmap images (output only).
+##
+
+__version__ = "1.0"
+
+from PIL import Image, ImageFile, _binary
+
+_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))
+
+
+# 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 i in range(len(_Palm8BitColormapValues)):
+ palettedata = palettedata + _Palm8BitColormapValues[i]
+ for i in range(256 - len(_Palm8BitColormapValues)):
+ palettedata = palettedata + (0, 0, 0)
+ 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,
+ }
+
+o8 = _binary.o8
+o16b = _binary.o16be
+
+
+#
+# --------------------------------------------------------------------
+
+##
+# (Internal) Image save plugin for the Palm format.
+
+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()
+
+
+#
+# --------------------------------------------------------------------
+
+Image.register_save("Palm", _save)
+
+Image.register_extension("Palm", ".palm")
+
+Image.register_mime("Palm", "image/palm")
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-23 02:15:56 +0100