[Bug 10522] endless WM_PAINT loop bug (update regions, queue paint count)

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=10522





--- Comment #18 from Austin Lund <austin.lund at gmail.com>  2010-08-15 01:47:12 ---
(In reply to comment #15)
> 
> b) When BeginPaint() is called and a WM_NCPAINT message is processed within it,
> the window is marked as invalid in wine when BeginPaint() returns.  In windows
> a BeginPaint() seems to mark everything as clean even if WM_NCPAINT called
> RedrawWindow(..,..,..,0x401).

On further investigation, this seems to be the more important part.

BeginPaint() should leave the whole thing validated even under the conditions
for this bug.  This means that the validation should occur AFTER all the other
window messages are sent and processed (such as WM_NCPAINT in this case). 
Currently it happens with a call of get_update_region to the wineserver before
any of the messages are sent.  Reversing this is probably the key.

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