From: Gerd Hoffmann <kraxel@redhat.com>
To: qemu-devel@nongnu.org
Cc: Gerd Hoffmann <kraxel@redhat.com>
Subject: [Qemu-devel] [PATCH] cirrus: fix off-by-one in cirrus_bitblt_rop_bkwd_transp_*_16
Date: Fri, 17 Mar 2017 08:21:36 +0100 [thread overview]
Message-ID: <1489735296-19047-1-git-send-email-kraxel@redhat.com> (raw)
The switch from pointers to addresses (commit
026aeffcb4752054830ba203020ed6eb05bcaba8 and
ffaf857778286ca54e3804432a2369a279e73aa7) added
a off-by-one bug to 16bit backward blits. Fix.
Reported-by: 李强 <liqiang6-s@360.cn>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
hw/display/cirrus_vga_rop.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/display/cirrus_vga_rop.h b/hw/display/cirrus_vga_rop.h
index c61a677..0841b9e 100644
--- a/hw/display/cirrus_vga_rop.h
+++ b/hw/display/cirrus_vga_rop.h
@@ -219,7 +219,7 @@ glue(glue(cirrus_bitblt_rop_bkwd_transp_, ROP_NAME),_16)(CirrusVGAState *s,
srcpitch += bltwidth;
for (y = 0; y < bltheight; y++) {
for (x = 0; x < bltwidth; x+=2) {
- ROP_OP_TR_16(s, dstaddr, cirrus_src16(s, srcaddr), transp);
+ ROP_OP_TR_16(s, dstaddr - 1, cirrus_src16(s, srcaddr - 1), transp);
dstaddr -= 2;
srcaddr -= 2;
}
--
1.8.3.1
next reply other threads:[~2017-03-17 7:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-17 7:21 Gerd Hoffmann [this message]
2017-03-17 8:31 ` [Qemu-devel] [PATCH] cirrus: fix off-by-one in cirrus_bitblt_rop_bkwd_transp_*_16 李强
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