X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1c304f30b97b1759beb7a1e92b1f1c63e37e9315..96b2cbe8b39292fed91654ff0d1f4b1c16561acb:/src/msw/imaglist.cpp

diff --git a/src/msw/imaglist.cpp b/src/msw/imaglist.cpp
index ff36d8bbb2..4fb0fbb83d 100644
--- a/src/msw/imaglist.cpp
+++ b/src/msw/imaglist.cpp
@@ -38,6 +38,8 @@
 #endif
 
 #include "wx/imaglist.h"
+#include "wx/dc.h"
+#include "wx/msw/dc.h"
 #include "wx/msw/private.h"
 
 // ----------------------------------------------------------------------------
@@ -241,7 +243,12 @@ bool wxImageList::Draw(int index,
                        int flags,
                        bool solidBackground)
 {
-    HDC hDC = GetHdcOf(dc);
+    wxDCImpl *impl = dc.GetImpl();
+    wxMSWDCImpl *msw_impl = wxDynamicCast( impl, wxMSWDCImpl );
+    if (!msw_impl)
+       return false;
+    
+    HDC hDC = GetHdcOf(*msw_impl);
     wxCHECK_MSG( hDC, false, _T("invalid wxDC in wxImageList::Draw") );
 
     COLORREF clr = CLR_NONE;    // transparent by default
@@ -278,7 +285,7 @@ bool wxImageList::Draw(int index,
 // Get the bitmap
 wxBitmap wxImageList::GetBitmap(int index) const
 {
-#if wxUSE_WXDIB
+#if wxUSE_WXDIB && wxUSE_IMAGE
     int bmp_width = 0, bmp_height = 0;
     GetSize(index, bmp_width, bmp_height);
 
@@ -340,6 +347,10 @@ wxIcon wxImageList::GetIcon(int index) const
 
 static HBITMAP GetMaskForImage(const wxBitmap& bitmap, const wxBitmap& mask)
 {
+#if wxUSE_IMAGE
+    wxBitmap bitmapWithMask;
+#endif // wxUSE_IMAGE
+
     HBITMAP hbmpMask;
     wxMask *pMask;
     bool deleteMask = false;
@@ -352,6 +363,23 @@ static HBITMAP GetMaskForImage(const wxBitmap& bitmap, const wxBitmap& mask)
     else
     {
         pMask = bitmap.GetMask();
+
+#if wxUSE_IMAGE
+        // check if we don't have alpha in this bitmap -- we can create a mask
+        // from it (and we need to do it for the older systems which don't
+        // support 32bpp bitmaps natively)
+        if ( !pMask )
+        {
+            wxImage img(bitmap.ConvertToImage());
+            if ( img.HasAlpha() )
+            {
+                img.ConvertAlphaToMask();
+                bitmapWithMask = wxBitmap(img);
+                pMask = bitmapWithMask.GetMask();
+            }
+        }
+#endif // wxUSE_IMAGE
+
         if ( !pMask )
         {
             // use the light grey count as transparent: the trouble here is