include/wx/dcmemory.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/dcmemory.h
   3 // Purpose:     wxMemoryDC base header
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:
   7 // Copyright:   (c) Julian Smart
   8 // RCS-ID:      $Id$
   9 // Licence:     wxWindows Licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DCMEMORY_H_BASE_
  13 #define _WX_DCMEMORY_H_BASE_
  14
  15 #include "wx/bitmap.h"
  16
  17 // NOTE: different native implementations of wxMemoryDC will derive from
  18 //       different wxDC classes (wxPaintDC, wxWindowDC, etc), so that
  19 //       we cannot derive wxMemoryDCBase from wxDC and then use it as the
  20 //       only base class for native impl of wxMemoryDC...
  21 class WXDLLEXPORT wxMemoryDCBase
  22 {
  23 public:
  24     wxMemoryDCBase() { }
  25
  26     // avoid warnings about having virtual functions but non virtual dtor
  27     virtual ~wxMemoryDCBase() { }
  28
  29     // select the given bitmap to draw on it
  30     void SelectObject(wxBitmap& bmp)
  31     {
  32         // make sure that the given wxBitmap is not sharing its data with other
  33         // wxBitmap instances as its contents will be modified by any drawing
  34         // operation done on this DC
  35         if (bmp.IsOk())
  36             bmp.UnShare();
  37
  38         DoSelect(bmp);
  39     }
  40
  41     // select the given bitmap for read-only
  42     virtual void SelectObjectAsSource(const wxBitmap& bmp)
  43     {
  44         DoSelect(bmp);
  45     }
  46
  47 protected:
  48     virtual void DoSelect(const wxBitmap& bmp) = 0;
  49 };
  50
  51 #if defined(__WXPALMOS__)
  52 #include "wx/palmos/dcmemory.h"
  53 #elif defined(__WXMSW__)
  54 #include "wx/msw/dcmemory.h"
  55 #elif defined(__WXMOTIF__)
  56 #include "wx/motif/dcmemory.h"
  57 #elif defined(__WXGTK20__)
  58 #include "wx/gtk/dcmemory.h"
  59 #elif defined(__WXGTK__)
  60 #include "wx/gtk1/dcmemory.h"
  61 #elif defined(__WXX11__)
  62 #include "wx/x11/dcmemory.h"
  63 #elif defined(__WXMGL__)
  64 #include "wx/mgl/dcmemory.h"
  65 #elif defined(__WXDFB__)
  66 #include "wx/dfb/dcmemory.h"
  67 #elif defined(__WXMAC__)
  68 #include "wx/mac/dcmemory.h"
  69 #elif defined(__WXCOCOA__)
  70 #include "wx/cocoa/dcmemory.h"
  71 #elif defined(__WXPM__)
  72 #include "wx/os2/dcmemory.h"
  73 #endif
  74
  75 #endif
  76     // _WX_DCMEMORY_H_BASE_