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[Qemu-devel] fix for winXP display corruption
From: |
Luke Deller |
Subject: |
[Qemu-devel] fix for winXP display corruption |
Date: |
Wed, 30 Jun 2004 12:25:07 +1000 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.7) Gecko/20040611 |
Hi,
I've installed Windows XP on the latest CVS version of qemu (using
-cirrusvga), but I got some rubbish / corruption on the screen.
Attached is a small patch which corrects this problem for me. (Some bitblt
code in hw/cirrus_vga_rop2.h was missing a case for 24-bit colour depths.
BTW that whole file looks like it assumes a little-endian host?).
Another problem is that when I try to increase the resolution above 640x480,
the resolution doesn't actually change. I haven't tracked this problem down
yet.
Regards,
Luke.
Index: hw/cirrus_vga_rop2.h
===================================================================
RCS file: /cvsroot/qemu/qemu/hw/cirrus_vga_rop2.h,v
retrieving revision 1.3
diff -u -r1.3 cirrus_vga_rop2.h
--- hw/cirrus_vga_rop2.h 9 Jun 2004 23:12:09 -0000 1.3
+++ hw/cirrus_vga_rop2.h 30 Jun 2004 02:14:41 -0000
@@ -52,6 +52,8 @@
pattern_pitch = 8;
#elif DEPTH == 16
pattern_pitch = 16;
+#elif DEPTH == 24
+ pattern_pitch = 24;
#else
pattern_pitch = 32;
#endif
@@ -67,6 +69,10 @@
#elif DEPTH == 16
col = ((uint16_t *)(src1 + pattern_x))[0];
pattern_x = (pattern_x + 2) & 15;
+#elif DEPTH == 24
+ col = ((uint16_t *)(src1 + pattern_x))[0];
+ col |= src1[pattern_x + 2] << 16;
+ pattern_x = (pattern_x + 3) % 24;
#else
col = ((uint32_t *)(src1 + pattern_x))[0];
pattern_x = (pattern_x + 4) & 31;
- [Qemu-devel] fix for winXP display corruption,
Luke Deller <=