Bugs item #1510885, was opened at 2006-06-22 21:24
Message generated for change (Comment added) made by joergl
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Category: None
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Josiah Carlson (josiahcarlson)
Assigned to: Nobody/Anonymous (nobody)
Summary: pyx draws bitmaps incorrectly
Initial Comment:
Running the following script should produce a series of
blocks of the 256 shades of grey between and including
black and white.
import pyx
pbb = pyx.bitmap.bitmap
pbi = pyx.bitmap.image
c = pyx.canvas.canvas()
for i in xrange(256):
c.insert(pbb(.5*(i&15), .5*(i>>4),
pbi(10,10,"L",100*chr(i)), height=.5))
c.writePDFfile('test.pdf')
Instead, it produces either an all-white or all-black
image at random. This is the case when using Windows
2000, Python 2.3 and 2.4, and is verifiable in both
Adobe Acrobat 7 and Foxit Reader 1.3 . Adjusting the
above code as necessary for RGB images does not fix the
problem.
The problem exists for the two most recent versions of PyX.
----------------------------------------------------------------------
>Comment By: Jörg Lehmann (joergl)
Date: 2006-06-23 09:36
Message:
Logged In: YES
user_id=390410
Hello Josiah,
thanks for your bug report. This bug has already been
fixed in SVN (revision 2825). The fix is a one-liner:
Index: pyx/bitmap.py
===================================================================
--- pyx/bitmap.py (Revision 2824)
+++ pyx/bitmap.py (Revision 2825)
@@ -259,6 +259,9 @@
PSstoreimage=0, PSmaxstrlen=4093,
PSbinexpand=1,
compressmode="Flate",
flatecompresslevel=6,
dctquality=75, dctoptimize=0,
dctprogression=0):
+ # keep a copy of the image instance to ensure
different id's
+ self.image = image
+
self.xpos = xpos
self.ypos = ypos
self.imagewidth, self.imageheight = image.size
I'm marking this bug as fixed and closing it.
Jörg
----------------------------------------------------------------------
Comment By: Josiah Carlson (josiahcarlson)
Date: 2006-06-23 01:28
Message:
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user_id=341410
A work-around is to create a temporary canvas, insert the
image into the temporary canvas, and insert the temporary
canvas into the main canvas.
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