[ros-dev] crash in win32k with the cirrus driver

[Hartmut Birr]

Hi,

if I use the cirrus driver in qemu, I get always wrong colors. After the
first double click to the cmd icon, ros crashs in
DIB_16BPP_BitBltSrcCopy. I've add the following code:

Index: subsys/win32k/dib/dib16bpp.c
===================================================================
--- subsys/win32k/dib/dib16bpp.c        (Revision 15885)
+++ subsys/win32k/dib/dib16bpp.c        (Arbeitskopie)
@@ -228,6 +228,8 @@
          }
        else
          {
+            DPRINT1("%d %d %d\n", BltInfo->SourceSurface->lDelta,
BltInfo->SourcePoint.x, BltInfo->SourcePoint.y);
+            DPRINT1("%d %d %d %d %d\n", BltInfo->DestSurface->lDelta,
BltInfo->DestRect.left, BltInfo->DestRect.top, BltInfo->DestRect.right,
BltInfo->DestRect.bottom);
 
I see often negative values for the source surface:

...
(subsys\win32k\dib\dib16bpp.c:231) -1120 -69 -69
(subsys\win32k\dib\dib16bpp.c:232) 1600 0 0 0 0
(subsys\win32k\dib\dib16bpp.c:231) -1120 -69 -69
(subsys\win32k\dib\dib16bpp.c:232) 1600 0 0 0 0
(subsys\win32k\dib\dib16bpp.c:231) -1120 0 13
(subsys\win32k\dib\dib16bpp.c:232) 1600 69 69 629 87
KeBugCheckWithTf at ntoskrnl\ke\catch.c:222
A problem has been detected and ReactOS has been shut down to prevent
damage to your computer.
...

I seems that win32k doesn't handle the negative values. I doesn't know
what they mean.

- Hartmut