Changeset 6603 for trunk/src/gdi32/dibitmap.cpp

Timestamp:

Aug 28, 2001, 8:58:57 PM (24 years ago)

Author:

sandervl

Message:

CreateDIBitmap fix for negative height

File:

• trunk/src/gdi32/dibitmap.cpp (modified) (2 diffs)

trunk/src/gdi32/dibitmap.cpp

@@ -1 @@
-/* $Id: dibitmap.cpp,v 1.26 2001-08-26 14:22:44 sandervl Exp $ */
+/* $Id: dibitmap.cpp,v 1.27 2001-08-28 18:58:57 sandervl Exp $ */
 
 /*
@@ -48 +48 @@
     {
         dprintf(("GDI32: CreateDIBitmap negative height! (%d,%d)", lpbmih->biWidth, lpbmih->biHeight));
+        //TODO: doesn't work if memory is readonly!!
         ((BITMAPINFOHEADER *)lpbmih)->biHeight = -lpbmih->biHeight;
+
+        if(lpbInit && fdwInit == CBM_INIT) {
+            // upside down
+            HBITMAP rc = 0;
+            long lLineByte = DIB_GetDIBWidthBytes(lpbmih->biWidth, lpbmih->biBitCount);
+            long lHeight   = lpbmih->biHeight;
+    
+            newbits = (WORD *)malloc( lLineByte * lHeight );
+            if(newbits) {
+                unsigned char *pbSrc = (unsigned char *)lpbInit + lLineByte * (lHeight - 1);
+                unsigned char *pbDst = (unsigned char *)newbits;
+                for(int y = 0; y < lHeight; y++) {
+                    memcpy( pbDst, pbSrc, lLineByte );
+                    pbDst += lLineByte;
+                    pbSrc -= lLineByte;
+                }
+                rc = CreateDIBitmap(hdc, lpbmih, fdwInit, newbits, lpbmi, fuUsage);
+                free( newbits );
+            }
+
+            ((BITMAPINFOHEADER *)lpbmih)->biHeight = iHeight;
+            return rc;
+        }
     }