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-rw-r--r--PIL/PalmImagePlugin.py226
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diff --git a/PIL/PalmImagePlugin.py b/PIL/PalmImagePlugin.py
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+#
+# The Python Imaging Library.
+# $Id: PalmImagePlugin.py 2438 2005-05-25 21:09:48Z Fredrik $
+#
+
+##
+# Image plugin for Palm pixmap images (output only).
+##
+
+__version__ = "1.0"
+
+import Image, ImageFile
+import StringIO
+
+_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(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,
+ }
+
+def o16b(i):
+ return chr(i>>8&255) + chr(i&255)
+
+#
+# --------------------------------------------------------------------
+
+##
+# (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 im.encoderinfo.has_key("bpp") 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 im.info.has_key("bpp") 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 = ((cols + (16/bpp - 1)) / (16 / bpp)) * 2;
+ transparent_index = 0
+ compression_type = _COMPRESSION_TYPES["none"]
+
+ flags = 0;
+ if im.mode == "P" and im.info.has_key("custom-colormap"):
+ flags = flags & _FLAGS["custom-colormap"]
+ colormapsize = 4 * 256 + 2;
+ colormapmode = im.palette.mode
+ colormap = im.getdata().getpalette()
+ else:
+ colormapsize = 0
+
+ if im.info.has_key("offset"):
+ offset = (rowbytes * rows + 16 + 3 + colormapsize) / 4;
+ else:
+ offset = 0
+
+ fp.write(o16b(cols) + o16b(rows) + o16b(rowbytes) + o16b(flags))
+ fp.write(chr(bpp))
+ fp.write(chr(version))
+ fp.write(o16b(offset))
+ fp.write(chr(transparent_index))
+ fp.write(chr(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(chr(i))
+ if colormapmode == 'RGB':
+ fp.write(chr(colormap[3 * i]) + chr(colormap[3 * i + 1]) + chr(colormap[3 * i + 2]))
+ elif colormapmode == 'RGBA':
+ fp.write(chr(colormap[4 * i]) + chr(colormap[4 * i + 1]) + chr(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 v0.9.1 at 2024-05-01 00:06:13 (GMT)