X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/155ecd4c4221d3bbc7aa93d472d11948f21d21ab..1ffeecf7a90f620c9a194a138bc84db17fdd18e0:/src/msw/dib.cpp

diff --git a/src/msw/dib.cpp b/src/msw/dib.cpp
index ee17d5d2b1..2abcde95b7 100644
--- a/src/msw/dib.cpp
+++ b/src/msw/dib.cpp
@@ -286,7 +286,7 @@ bool wxDIB::Load(const wxString& filename)
     m_handle = (HBITMAP)::LoadImage
                          (
                             wxGetInstance(),
-                            filename,
+                            filename.fn_str(),
                             IMAGE_BITMAP,
                             0, 0, // don't specify the size
                             LR_CREATEDIBSECTION | LR_LOADFROMFILE
@@ -775,14 +775,26 @@ wxImage wxDIB::ConvertToImage() const
             dst[1] = *src++;
             dst[0] = *src++;
 
-            dst += 3;
-
             if ( is32bit )
             {
                 if ( alpha )
-                    *alpha++ = *src;
+                {
+                    // wxImage uses non premultiplied alpha so undo
+                    // premultiplication done in Create() above
+                    const unsigned char a = *src;
+                    *alpha++ = a;
+                    if ( a > 0 )
+                    {
+                        dst[0] = (dst[0] * 255 - 127) / a;
+                        dst[1] = (dst[1] * 255 - 127) / a;
+                        dst[2] = (dst[2] * 255 - 127) / a;
+                    }
+                }
+
                 src++;
             }
+
+            dst += 3;
         }
 
         // pass to the previous line in the image