allow raw access to a part of the image only (faster when using alpha)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@20409 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2003-05-01 16:37:51 +00:00
parent b72b192036
commit a452af5e68
3 changed files with 94 additions and 20 deletions
--- a/src/msw/dc.cpp
+++ b/src/msw/dc.cpp
@@ -2314,7 +2314,7 @@ wxAlphaBlend(wxDC& dc, int xDst, int yDst, int w, int h, const wxBitmap& bmpSrc)

    // combine them with the source bitmap using alpha
    wxAlphaPixelData dataDst(bmpDst),
-                     dataSrc(bmpSrc);
+                     dataSrc((wxBitmap &)bmpSrc);

    wxCHECK_RET( dataDst && dataSrc,
                    _T("failed to get raw data in wxAlphaBlend") );