Hi Phil
Thanks for pointing this out. I see the issue here.
Cheers
Tony
-------------
On Friday 10 March 2006 5:36 pm, Tony Willis wrote:
Hi
I'm using PyQt3.13 and have run across a problem with the
python interface to the QImage setPixel method. You can see this
directly by replacing line 90 of examples3/desktop.py
image.setPixel(x,y,(x+y)%128)
by
image.setPixel(x,y, qRgb(x,y,0))
this will result in error messsages such as
Image::setPixel: index=-16050688 out of range
A call to Qimage.setColor with a qRgb object does work.
The problem is that the setPixel method is expecting an
unsigned int - the call in the original demo will work
because (x+y)%128 will not get near the sign bit for a
python int, whereas qRgb(x,y,0) can return an unsigned
value > the range of a python int.
I see that qimage.sip has void setPixel(int,int,uint);
whereas it has void setColor(int,QRgb);
Thanks for any advice on how to get around this problem.
This isn't a PyQt problem. From the Qt docs...
"If the image is a paletted image (depth() <= 8) and index_or_rgb >=
numColors(), the result is undefined."
Phil
___________
Tony Willis
National Research Council [EMAIL PROTECTED]
Box 248 (250)493-2277
Penticton, BC V2A 6J9 fax: 493-7767
Government of Canada Gouvernement du Canada
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