[PyQt] QPixmap issue with pyqt 4.5.1

[Phil Thompson]

On Mon, 29 Jun 2009 12:49:06 -0600, Frank Schima <schimaf at boulder.nist.gov>
wrote:
> On Jun 29, 2009, at 10:56 AM, Phil Thompson wrote:
> 
>> On Mon, 29 Jun 2009 08:48:12 -0600, Frank Schima
>> <schimaf at boulder.nist.gov
>> >
>> wrote:
>>> On Jun 26, 2009, at 10:52 AM, Frank Schima wrote:
>>>
>>>> I'm seeing a strange issue with either QPixmap or QImage loading
>>>> from a data string. In pyqt 4.4.4, the following attached example
>>>> code produces an image - it looks like noise as expected. But with
>>>> pyqt 4.5.1, it appears completely blank. I expect to see the noise-
>>>> like image. Am I doing something wrong, or has something changed
>>>> with regards to this in 4.5?
>>>>
>>>> I'm running on Mac OS X 10.5.7 and python 2.5.4 using pyqt installed
>>>> from Macports. Note: I modified my local portfile to install pyqt
>>>> 4.5.1 because Macports is currently at version 4.4.4.
>>>
>>> The problem turned out to be in my makeColorTable method.  
>>> Specifically
>>> the qRgb() function returns a different value for me with pyqt 4.5.1
>>> and sip 4.8.1 than the value returned using 4.4.4/4.7.9. Should there
>>> be any difference between versions for that function?
>>>
>>> For example, for qRgb(0,0,0) I get -16777216 with 4.4.4 and  
>>> 4278190080
>>> with 4.5.1.
>>
>> Yes, there was a bug fix to ensure that the returned value was always
>> unsigned.
> 
> 
> 
> Ah thanks. However, only the negative values work for me though (in  
> either version of pyqt). My QImage with the positive values colortable  
> comes out completely blank (or white). So I'm not sure how it is  
> supposed to work?

Should be fixed in tonight's snapshot.

Phil