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Commit 1e2e45ce authored by Alexandre Julliard's avatar Alexandre Julliard
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winex11: Avoid overflowing the source rectangle in StretchBlt.

parent 5ce421ef
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Showing with 5 additions and 12 deletions
dlls/winex11.drv/bitblt.c
View file @ 1e2e45ce
......@@ -804,9 +804,7 @@ static void BITBLT_StretchImage( XImage *srcImage, XImage *dstImage,
/* Retrieve a source row */
BITBLT_GetRow( srcImage, rowSrc, (ysrc >> 16) - visRectSrc->top,
hswap ? widthSrc - visRectSrc->right
: visRectSrc->left,
visRectSrc->right - visRectSrc->left,
visRectSrc->left, visRectSrc->right - visRectSrc->left,
dstImage->depth, foreground, background, pixel_mask, hswap );
/* Stretch or shrink it */
......@@ -814,9 +812,7 @@ static void BITBLT_StretchImage( XImage *srcImage, XImage *dstImage,
BITBLT_StretchRow( rowSrc, rowDst, visRectDst->left,
visRectDst->right - visRectDst->left,
xinc, xoff, mode );
else BITBLT_ShrinkRow( rowSrc, rowDst,
hswap ? widthSrc - visRectSrc->right
: visRectSrc->left,
else BITBLT_ShrinkRow( rowSrc, rowDst, visRectSrc->left,
visRectSrc->right - visRectSrc->left,
xinc, xoff, mode );
......@@ -863,9 +859,7 @@ static void BITBLT_StretchImage( XImage *srcImage, XImage *dstImage,
/* Retrieve a source row */
BITBLT_GetRow( srcImage, rowSrc, ysrc - visRectSrc->top,
hswap ? widthSrc - visRectSrc->right
: visRectSrc->left,
visRectSrc->right - visRectSrc->left,
visRectSrc->left, visRectSrc->right - visRectSrc->left,
dstImage->depth, foreground, background, pixel_mask, hswap );
/* Stretch or shrink it */
......@@ -873,9 +867,7 @@ static void BITBLT_StretchImage( XImage *srcImage, XImage *dstImage,
BITBLT_StretchRow( rowSrc, rowDst, visRectDst->left,
visRectDst->right - visRectDst->left,
xinc, xoff, mode );
else BITBLT_ShrinkRow( rowSrc, rowDst,
hswap ? widthSrc - visRectSrc->right
: visRectSrc->left,
else BITBLT_ShrinkRow( rowSrc, rowDst, visRectSrc->left,
visRectSrc->right - visRectSrc->left,
xinc, xoff, mode );
......@@ -1474,6 +1466,7 @@ BOOL X11DRV_StretchBlt( PHYSDEV dst_dev, struct bitblt_coords *dst,
GC tmpGC;
if (IsRectEmpty( &dst->visrect )) return TRUE;
if (IsRectEmpty( &src->visrect )) return TRUE;
fStretch = (src->width != dst->width) || (src->height != dst->height);
......
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