Hi!
I am making an image converter using PIL 1.1.7 and PyQt 4.6 for the gui.
Everything goes perfect, except when i try to convert an image in "P"
mode (8 bit pixels and using a colour palette) to QImage, using the
ImageQt module.
self.img = ImageQt.ImageQt(self.raw_image)
In this case, always i get a white image, it doesn't appear any error messages.
But if i copy the code of the conversion from the ImageQt module, i
get the next error:
File "cpcview.py", line 482, in initialize_image_to_convert
palette_image = self.raw_image.getpalette()
File "/usr/lib/python2.5/site-packages/PIL/Image.py", line 932, in
getpalette
self.load()
File "/usr/lib/python2.5/site-packages/PIL/ImageFile.py", line 127,
in load
pixel = Image.Image.load(self)
File "/usr/lib/python2.5/site-packages/PIL/Image.py", line 608, in
load
if self.im and self.palette and self.palette.dirty:
OverflowError: can't convert negative value to unsigned long
The possible bug appears in the getpalette() function, i am using now
a workaround to fix it, using "palette.getdata()" instead of
"getpalette()". This is the workaround in my program:
self.img = ImageQt.ImageQt(self.raw_image)
# Workaround to "OverflowError: can't convert negative value to unsigned long"
if self.imagen_cruda.mode == "P":
palette_image = self.imagen_cruda.palette.getdata()
palette_image = palette_image[1]
colorlist = []
for i in range(len(palette_image) // 3):
colorlist.append(QtGui.qRgba(ord(palette_image[i * 3]),
ord(palette_image[i * 3 + 1]),
ord(palette_image[i * 3 + 2]), 0xFF))
self.img.setColorTable(colorlist)
Is it really a bug or am i using incorrectly the ImageQt module?
Is there a better or more "pythonic" fix to this problem?
Thanks for this wonderful library,
Maurice.
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