fixed wxImage->wxBitmap conversion for images with alpha channel

[wxWidgets.git] / include / wx / gtk / region.h

diff --git a/include/wx/gtk/region.h b/include/wx/gtk/region.h
index 90356ba2ea8a05b0b212a2bdbfd9686bd7d1b1f5..5eec88fe8222f64bd5808674f80ef360f3e0613e 100644 (file)
--- a/include/wx/gtk/region.h
+++ b/include/wx/gtk/region.h
@@ -72,9 +72,12 @@ public:
 
     wxRegion( size_t n, const wxPoint *points, int fillStyle = wxODDEVEN_RULE );
 
+    wxRegion( const wxBitmap& bmp)
+    {
+        Union(bmp);
+    }
     wxRegion( const wxBitmap& bmp,
-              const wxColour& transColour = wxNullColour,
-              int   tolerance = 0)
+              const wxColour& transColour, int tolerance = 0)
     {
         Union(bmp, transColour, tolerance);
     }
@@ -127,12 +130,13 @@ public:
     wxBitmap ConvertToBitmap() const;
 
     // Use the non-transparent pixels of a wxBitmap for the region to combine
-    // with this region.  If the bitmap has a mask then it will be used,
-    // otherwise the colour to be treated as transparent may be specified,
+    // with this region.  First version takes transparency from bitmap's mask,
+    // second lets the user specify the colour to be treated as transparent
     // along with an optional tolerance value.
+    // NOTE: implemented in common/rgncmn.cpp
+    bool Union(const wxBitmap& bmp);
     bool Union(const wxBitmap& bmp,
-               const wxColour& transColour = wxNullColour,
-               int   tolerance = 0);
+               const wxColour& transColour, int tolerance = 0);
 
 
 public: