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[WIN32K] Fix off-by-one errors

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Spotted by Doug Lyons
CORE-17520
This commit is contained in:
Jérôme Gardou 2021-03-31 09:59:44 +02:00 committed by Jérôme Gardou
parent 998870c5ea
commit 068687e0fd
1 changed files with 2 additions and 2 deletions
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4
win32ss/gdi/dib/dib1bpp.c
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@ -78,7 +78,7 @@ DIB_1BPP_BitBltSrcCopy_From1BPP (
{
LONG yDst = DestRect->top + Height;
LONG ySrc = bTopToBottom ?
SourcePoint->y + RECTL_lGetHeight(DestRect) - Height
SourcePoint->y + RECTL_lGetHeight(DestRect) - Height - 1
: SourcePoint->y + Height;
LONG Width = RECTL_lGetWidth(DestRect);
@ -86,7 +86,7 @@ DIB_1BPP_BitBltSrcCopy_From1BPP (
{
LONG xDst = DestRect->left + Width;
LONG xSrc = bLeftToRight ?
SourcePoint->x + RECTL_lGetWidth(DestRect) - Width
SourcePoint->x + RECTL_lGetWidth(DestRect) - Width - 1
: SourcePoint->x + Width;
ULONG PixelPut = DIB_1BPP_GetPixel(SourceSurf, xSrc, ySrc);
if (XorBit)