added alpha channel support to wxDFB's wxBitmap

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47205 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2007-07-06 22:24:28 +00:00
parent b6ac40dc77
commit e2badebb8f
3 changed files with 165 additions and 47 deletions
--- a/src/dfb/dc.cpp
+++ b/src/dfb/dc.cpp
@@ -691,7 +691,10 @@ bool wxDC::DoBlitFromSurface(const wxIDirectFBSurfacePtr& src,
    wxIDirectFBSurfacePtr dst(m_surface);

    // FIXME: this will have to be different in useMask case, see above
-    if ( !dst->SetBlittingFlags(DSBLIT_NOFX) )
+    DFBSurfaceBlittingFlags blitFlag = (src->GetPixelFormat() == DSPF_ARGB)
+                                       ? DSBLIT_BLEND_ALPHACHANNEL
+                                       : DSBLIT_NOFX;
+    if ( !dst->SetBlittingFlags(blitFlag) )
        return false;

    if ( srcRect.w != dstRect.w || srcRect.h != dstRect.h )