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Check for malformed source rect in DIB_DirectDrawSurfact_BltFast, and 

return DDERR_INVALID_RECT.
This commit is contained in:
Crestez Leonard 2004-12-21 14:47:35 +00:00 committed by Alexandre Julliard
parent 2b98f3255f
commit f4205ad71f
1 changed files with 10 additions and 0 deletions
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10
dlls/ddraw/dsurface/dib.c
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@ -999,6 +999,16 @@ DIB_DirectDrawSurface_BltFast(LPDIRECTDRAWSURFACE7 iface, DWORD dstx,
rsrc->bottom = sdesc.dwHeight;
}
/* Check source rect for validity. Copied from normal Blt. Fixes Baldur's Gate.*/
if ((rsrc->bottom > sdesc.dwHeight) || (rsrc->bottom < 0) ||
(rsrc->top > sdesc.dwHeight) || (rsrc->top < 0) ||
(rsrc->left > sdesc.dwWidth) || (rsrc->left < 0) ||
(rsrc->right > sdesc.dwWidth) || (rsrc->right < 0) ||
(rsrc->right < rsrc->left) || (rsrc->bottom < rsrc->top)) {
WARN("Application gave us bad source rectangle for BltFast.\n");
return DDERR_INVALIDRECT;
}
h=rsrc->bottom-rsrc->top;
if (h>ddesc.dwHeight-dsty) h=ddesc.dwHeight-dsty;
if (h>sdesc.dwHeight-rsrc->top) h=sdesc.dwHeight-rsrc->top;