X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/17a6a2e097cf7c2c952685f3529c527bfb71a6bc..1e151594721201f2048aa295dcf35acd28f012b9:/src/msw/dc.cpp

diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp
index b723df633d..c6f000a796 100644
--- a/src/msw/dc.cpp
+++ b/src/msw/dc.cpp
@@ -553,10 +553,10 @@ void wxDC::Clear()
     ::FillRect(GetHdc(), &rect, brush);
     ::DeleteObject(brush);
 
+#ifndef __WXWINCE__
     int width = DeviceToLogicalXRel(VIEWPORT_EXTENT)*m_signX,
         height = DeviceToLogicalYRel(VIEWPORT_EXTENT)*m_signY;
 
-#ifndef __WXWINCE__
     ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
 
     ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
@@ -819,7 +819,7 @@ wxDC::DoDrawPolyPolygon(int n,
 {
 #ifdef __WXWINCE__
     wxDCBase::DoDrawPolyPolygon(n, count, points, xoffset, yoffset, fillStyle);
-#else    
+#else
     WXMICROWIN_CHECK_HDC
 
     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
@@ -840,11 +840,11 @@ wxDC::DoDrawPolyPolygon(int n,
         }
 #ifndef __WXWINCE__
         int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
-#endif        
+#endif
         (void)PolyPolygon(GetHdc(), cpoints, count, n);
 #ifndef __WXWINCE__
         SetPolyFillMode(GetHdc(),prev);
-#endif        
+#endif
         delete[] cpoints;
     }
     else
@@ -854,11 +854,11 @@ wxDC::DoDrawPolyPolygon(int n,
 
 #ifndef __WXWINCE__
         int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
-#endif        
+#endif
         (void)PolyPolygon(GetHdc(), (POINT*) points, count, n);
 #ifndef __WXWINCE__
         SetPolyFillMode(GetHdc(),prev);
-#endif        
+#endif
     }
 #endif
   // __WXWINCE__
@@ -1911,8 +1911,11 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
 
     WXMICROWIN_CHECK_HDC_RET(false)
 
+    // if either the source or destination has alpha channel, we must use
+    // AlphaBlt() as other function don't handle it correctly
     const wxBitmap& bmpSrc = source->m_selectedBitmap;
-    if ( bmpSrc.Ok() && bmpSrc.HasAlpha() )
+    if ( bmpSrc.Ok() && (bmpSrc.HasAlpha() ||
+            (m_selectedBitmap.Ok() && m_selectedBitmap.HasAlpha())) )
     {
         if ( AlphaBlt(GetHdc(), xdest, ydest, width, height,
                       GetHdcOf(*source), bmpSrc) )
@@ -2128,7 +2131,7 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
                     // On Win9x this API fails most (all?) of the time, so
                     // logging it becomes quite distracting.  Since it falls
                     // back to the code below this is not really serious, so
-                    // don't log it.                     
+                    // don't log it.
                     //wxLogLastError(wxT("StretchDIBits"));
                 }
                 else
@@ -2458,6 +2461,7 @@ static bool AlphaBlt(HDC hdcDst,
 #else // !wxHAVE_RAW_BITMAP
     // no wxAlphaBlend() neither, fall back to using simple BitBlt() (we lose
     // alpha but at least something will be shown like this)
+    wxUnusedVar(bmp);
     return false;
 #endif // wxHAVE_RAW_BITMAP
 }