commit ed744e787c5101eb448a08fe294dccb17c0478e5
author Matthew J. Francis <asbel@dial.pipex.com> Sun Oct 24 17:28:23 1999 +0000
committer Alexandre Julliard <julliard@winehq.org> Sun Oct 24 17:28:23 1999 +0000
tree 4b4938c6e3144c79f2ec5d2265b2a06eab3ae99c
parent e8ffab62e822b6d86b353aa65373e7053644543a

Fixed top-down DIB handling in StretchDIBits32().

objects/dib.c

diff --git a/objects/dib.c b/objects/dib.c
index 9fbb0ce..db119c3 100644
--- a/objects/dib.c
+++ b/objects/dib.c
@@ -145,14 +145,15 @@
     else { /* use StretchBlt32 */
         HBITMAP hBitmap, hOldBitmap;
 	HDC hdcMem;
-    
+
 	hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
 				    bits, info, wUsage );
 	hdcMem = CreateCompatibleDC( hdc );
 	hOldBitmap = SelectObject( hdcMem, hBitmap );
-        /* Origin for DIBitmap is bottom left ! */
+        /* Origin for DIBitmap may be bottom left (positive biHeight) or top
+           left (negative biHeight) */
         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
-                      hdcMem, xSrc, info->bmiHeader.biHeight - heightSrc - ySrc, 
+                      hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc, 
                       widthSrc, heightSrc, dwRop );
 	SelectObject( hdcMem, hOldBitmap );
 	DeleteDC( hdcMem );