[Spice-devel] Strange issue with PhotoShop 6

[Frediano Ziglio]

> > 
> > Hi,
> >   trying the lazzo issue I find this issue:
> > 
> > https://www.youtube.com/watch?v=fzCo6gxKLyA
> > 
> > Note that the problem does not disappear if you close and open (you can
> > still
> > see the garbage on the screen). Also a printscreen inside the VM (so paste
> > on mspaint for instance) present the garbage so is not surely a compression
> > or server->client error (the corruption seems on the frame buffer too).
> > Using a standard VGA (same VM) the problem does not appear.
> > I recorded (SPICE_WORKER_RECORD_FILENAME) the screen and the problem
> > happens
> > also doing a replay (I can post the file, is only 17MB compressed with xz).
> > The selection is made with a dotted line and a XOR operation (you can see
> > clearly using an image, the video used a white background).
> > The version of Windows is 7. 32 bit display.
> > 
> > Any hint?
> > Similar issues?
> > 
> 
> Digging on looks like Windows issues DRAW_FILL commands with:
> - an 8x8 32 bit pattern
> - xor rop operation
> - a (0,0) offset
> Also looks like this is due to the display of informations near the selected
> area which looks computed entirely by Windows causing the weird garbage on
> the next xor operation which is supposed to remove the old selection. I can
> suppose is a problem of the Windows driver sending wrong offsets or some
> miscomputation on the offset in our canvas code.
> 

Fixed by https://lists.freedesktop.org/archives/spice-devel/2018-January/041415.html
see the new video at https://www.youtube.com/watch?v=-FQOwQxJ3dE.

Enjoy using PaintShop 6 :-)

Frediano