Re: Working with bitmaps

On Wednesday 12 February 2003 03:55 am, Alberto Narduzzi wrote:
> > If you are interested I also found a lot of differences between Win and
> > Clx
>
> (...)
>
> Indeed I am interested in, well, I'm first looking for solutions, but
> knowing in advance what problems could arise is always a good starting
> point.

I'm no expert on X, but I think that many of the differences between CLX under 
Linux and CLX under Windows are due to the way that the X Server works, and 
it may be that different configurations of X will cause subtle changes in the 
way that CLX behaves.

As for VCL, there are quite large differences between CLX and VCL even on 
Windows from what I can tell.

One thing I have experienced is that scanline operations on Linux are very 
slow.  It seems that the image is copied back from the X server before a 
scanline operation is allowed.  I tried all of the windows dodges for 
increasing performance of scaline, but none of them gave satisfactory 
results, and eventually I settled on simply using a QImage to handle high 
speed screen updates.

-- 
adam


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