Add NUM_CUSTOM

[wxWidgets.git] / interface / wx / bitmap.h

diff --git a/interface/wx/bitmap.h b/interface/wx/bitmap.h
index 2a2d6b5cb80008d549588d10b42c734ba68f5969..2edeee959f439365a8ced2955c37b04ebe3fd960 100644 (file)
--- a/interface/wx/bitmap.h
+++ b/interface/wx/bitmap.h
@@ -165,7 +165,7 @@ public:
     If you need direct access the bitmap data instead going through
     drawing to it using wxMemoryDC you need to use the wxPixelData
     class (either wxNativePixelData for RGB bitmaps or wxAlphaPixelData
-    for bitmaps with an additionaly alpha channel).
+    for bitmaps with an additionally alpha channel).
 
     Note that many wxBitmap functions take a @e type parameter, which is a 
     value of the ::wxBitmapType enumeration.
@@ -183,6 +183,17 @@ public:
     Note that all available wxBitmapHandlers for a given wxWidgets port are 
     automatically loaded at startup so you won't need to use wxBitmap::AddHandler.
 
+    More on the difference between wxImage and wxBitmap: wxImage is just a
+    buffer of RGB bytes with an optional buffer for the alpha bytes. It is all
+    generic, platform independent and image file format independent code. It
+    includes generic code for scaling, resizing, clipping, and other manipulations
+    of the image data. OTOH, wxBitmap is intended to be a wrapper of whatever is
+    the native image format that is quickest/easiest to draw to a DC or to be the
+    target of the drawing operations performed on a wxMemoryDC. By splitting the
+    responsibilities between wxImage/wxBitmap like this then it's easier to use
+    generic code shared by all platforms and image types for generic operations and
+    platform specific code where performance or compatibility is needed.
+
     @library{wxcore}
     @category{gdi}
 
@@ -508,6 +519,9 @@ public:
 
     /**
         Returns disabled (dimmed) version of the bitmap.
+
+        This method is not available when <code>wxUSE_IMAGE == 0</code>.
+
         @since 2.9.0
     */
     wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;