[Qt-interest] Generating regions from image, but pixel access required to generate the image

[Alexander Vassilev]

Hi all,

I need to generate an image that will be used to create a region that 
will be set as a shape of a window. QRegion can be generated only from a 
QBitmap type of image. However, in the process of generating the image, 
I need to access image pixels directly, which is supported only in 
QImage. Thus, I end up with the necessity to convert the generated 
QImage to a QBitmap, and then use the bitmap to create the region. All 
this will happen quite frequently in the application (on each resize 
step), and I am concerned about the overhead of the QImage->QBitmap 
conversion. Is there a way to avoid this?
Thanks in advance

Best regards
Alex
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