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cirrus: fix off-by-one in cirrus_bitblt_rop_bkwd_transp_*_16

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The switch from pointers to addresses (commit
026aeffcb4 and
ffaf857778) 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>
Reviewed-by: Li Qiang <liqiang6-s@360.cn>
Message-id: 1489735296-19047-1-git-send-email-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2017-03-17 08:21:36 +01:00
parent 8bb93c6f99
commit f019722cbb
1 changed files with 1 additions and 1 deletions
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2
hw/display/cirrus_vga_rop.h
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@ -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;
}