don't allocate backbuffer for dummy surfaces

[wxWidgets.git] / include / wx / image.h

diff --git a/include/wx/image.h b/include/wx/image.h
index 51c77dbb4c066f4e441a317f014f73b17bd23f3b..3e3e8d46f59033a9955691771a2af6db7d3e32ce 100644 (file)
--- a/include/wx/image.h
+++ b/include/wx/image.h
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        image.h
+// Name:        wx/image.h
 // Purpose:     wxImage class
 // Author:      Robert Roebling
 // RCS-ID:      $Id$
@@ -11,6 +11,9 @@
 #define _WX_IMAGE_H_
 
 #include "wx/defs.h"
+
+#if wxUSE_IMAGE
+
 #include "wx/object.h"
 #include "wx/string.h"
 #include "wx/gdicmn.h"
@@ -20,8 +23,6 @@
 #  include "wx/stream.h"
 #endif
 
-#if wxUSE_IMAGE
-
 // on some systems (Unixware 7.x) index is defined as a macro in the headers
 // which breaks the compilation below
 #undef index
@@ -42,6 +43,13 @@ enum
     wxIMAGE_RESOLUTION_CM = 2
 };
 
+// Constants for wxImage::Scale() for determining the level of quality
+enum
+{
+    wxIMAGE_QUALITY_NORMAL = 0,
+    wxIMAGE_QUALITY_HIGH = 1
+};
+
 // alpha channel values: fully transparent, default threshold separating
 // transparent pixels from opaque for a few functions dealing with alpha and
 // fully opaque
@@ -215,12 +223,21 @@ public:
     void Paste( const wxImage &image, int x, int y );
 
     // return the new image with size width*height
-    wxImage Scale( int width, int height ) const;
+    wxImage Scale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) const;
+
+    // box averager and bicubic filters for up/down sampling
+    wxImage ResampleBox(int width, int height) const;
+    wxImage ResampleBicubic(int width, int height) const;
+
+    // blur the image according to the specified pixel radius
+    wxImage Blur(int radius);
+    wxImage BlurHorizontal(int radius);
+    wxImage BlurVertical(int radius);
 
     wxImage ShrinkBy( int xFactor , int yFactor ) const ;
 
     // rescales the image in place
-    wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); }
+    wxImage& Rescale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) { return *this = Scale(width, height, quality); }
 
     // resizes the image in place
     wxImage& Resize( const wxSize& size, const wxPoint& pos,
@@ -425,4 +442,3 @@ extern WXDLLEXPORT_DATA(wxImage)    wxNullImage;
 
 #endif
   // _WX_IMAGE_H_
-