include/wx/msw/bitmap.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        bitmap.h
   3 // Purpose:     wxBitmap class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_BITMAP_H_
  13 #define _WX_BITMAP_H_
  14
  15 #ifdef __GNUG__
  16 #pragma interface "bitmap.h"
  17 #endif
  18
  19 #include "wx/gdiobj.h"
  20 #include "wx/gdicmn.h"
  21 #include "wx/palette.h"
  22
  23 // Bitmap
  24 class WXDLLEXPORT wxDC;
  25 class WXDLLEXPORT wxControl;
  26 class WXDLLEXPORT wxBitmap;
  27 class WXDLLEXPORT wxBitmapHandler;
  28 class WXDLLEXPORT wxIcon;
  29 class WXDLLEXPORT wxCursor;
  30 class WXDLLEXPORT wxControl;
  31
  32 // A mask is a mono bitmap used for drawing bitmaps
  33 // transparently.
  34 class WXDLLEXPORT wxMask: public wxObject
  35 {
  36   DECLARE_DYNAMIC_CLASS(wxMask)
  37
  38 public:
  39   wxMask();
  40
  41   // Construct a mask from a bitmap and a colour indicating
  42   // the transparent area
  43   wxMask(const wxBitmap& bitmap, const wxColour& colour);
  44
  45   // Construct a mask from a bitmap and a palette index indicating
  46   // the transparent area
  47   wxMask(const wxBitmap& bitmap, int paletteIndex);
  48
  49   // Construct a mask from a mono bitmap (copies the bitmap).
  50   wxMask(const wxBitmap& bitmap);
  51
  52   ~wxMask();
  53
  54   bool Create(const wxBitmap& bitmap, const wxColour& colour);
  55   bool Create(const wxBitmap& bitmap, int paletteIndex);
  56   bool Create(const wxBitmap& bitmap);
  57
  58   // Implementation
  59   inline WXHBITMAP GetMaskBitmap(void) const { return m_maskBitmap; }
  60   inline void SetMaskBitmap(WXHBITMAP bmp) { m_maskBitmap = bmp; }
  61 protected:
  62   WXHBITMAP m_maskBitmap;
  63 };
  64
  65 class WXDLLEXPORT wxBitmapRefData: public wxGDIRefData
  66 {
  67     friend class WXDLLEXPORT wxBitmap;
  68     friend class WXDLLEXPORT wxIcon;
  69     friend class WXDLLEXPORT wxCursor;
  70 public:
  71     wxBitmapRefData();
  72     ~wxBitmapRefData();
  73
  74 public:
  75   int           m_width;
  76   int           m_height;
  77   int           m_depth;
  78   bool          m_ok;
  79   int           m_numColors;
  80   wxPalette     m_bitmapPalette;
  81   int           m_quality;
  82
  83 #ifdef __WXMSW__
  84   WXHBITMAP     m_hBitmap;
  85   wxDC *        m_selectedInto; // So bitmap knows whether it's been selected into
  86                       // a device context (for error checking)
  87   wxMask *      m_bitmapMask; // Option mask
  88 #endif
  89 };
  90
  91 #define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
  92
  93 class WXDLLEXPORT wxBitmapHandler: public wxObject
  94 {
  95   DECLARE_DYNAMIC_CLASS(wxBitmapHandler)
  96 public:
  97   wxBitmapHandler(void) { m_name = ""; m_extension = ""; m_type = 0; };
  98
  99   virtual bool Create(wxBitmap *bitmap, void *data, long flags, int width, int height, int depth = 1);
 100   virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
 101       int desiredWidth, int desiredHeight);
 102   virtual bool SaveFile(wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette = NULL);
 103
 104   inline void SetName(const wxString& name) { m_name = name; }
 105   inline void SetExtension(const wxString& ext) { m_extension = ext; }
 106   inline void SetType(long type) { m_type = type; }
 107   inline wxString GetName(void) const { return m_name; }
 108   inline wxString GetExtension(void) const { return m_extension; }
 109   inline long GetType(void) const { return m_type; }
 110 protected:
 111   wxString  m_name;
 112   wxString  m_extension;
 113   long      m_type;
 114 };
 115 #define M_BITMAPHANDLERDATA ((wxBitmapRefData *)bitmap->GetRefData())
 116
 117 class WXDLLEXPORT wxBitmap: public wxGDIObject
 118 {
 119   DECLARE_DYNAMIC_CLASS(wxBitmap)
 120
 121   friend class WXDLLEXPORT wxBitmapHandler;
 122
 123 public:
 124   wxBitmap(); // Platform-specific
 125
 126   // Copy constructors
 127   wxBitmap(const wxBitmap& bitmap);
 128
 129   // Initialize with raw data
 130   wxBitmap(const char bits[], int width, int height, int depth = 1);
 131
 132   // Initialize with XPM data
 133   wxBitmap(char **data, wxControl *anItem = NULL);
 134
 135   // Load a file or resource
 136   wxBitmap(const wxString& name, long type = wxBITMAP_TYPE_BMP_RESOURCE);
 137
 138   // New constructor for generalised creation from data
 139   wxBitmap(void *data, long type, int width, int height, int depth = 1);
 140
 141   // If depth is omitted, will create a bitmap compatible with the display
 142   wxBitmap(int width, int height, int depth = -1);
 143
 144   // we must have this, otherwise icons are silently copied into bitmaps using
 145   // the copy ctor but the resulting bitmap is invalid!
 146   wxBitmap(const wxIcon& icon);
 147
 148   ~wxBitmap();
 149
 150   virtual bool Create(int width, int height, int depth = -1);
 151   virtual bool Create(void *data, long type, int width, int height, int depth = 1);
 152   virtual bool LoadFile(const wxString& name, long type = wxBITMAP_TYPE_BMP_RESOURCE);
 153   virtual bool SaveFile(const wxString& name, int type, const wxPalette *cmap = NULL);
 154
 155   inline bool Ok(void) const { return (M_BITMAPDATA && M_BITMAPDATA->m_ok); }
 156   inline int GetWidth(void) const { return (M_BITMAPDATA ? M_BITMAPDATA->m_width : 0); }
 157   inline int GetHeight(void) const { return (M_BITMAPDATA ? M_BITMAPDATA->m_height : 0); }
 158   inline int GetDepth(void) const { return (M_BITMAPDATA ? M_BITMAPDATA->m_depth : 0); }
 159   inline int GetQuality(void) const { return (M_BITMAPDATA ? M_BITMAPDATA->m_quality : 0); }
 160   void SetWidth(int w);
 161   void SetHeight(int h);
 162   void SetDepth(int d);
 163   void SetQuality(int q);
 164   void SetOk(bool isOk);
 165 #if WXWIN_COMPATIBILITY
 166   inline wxPalette *GetColourMap(void) const { return GetPalette(); }
 167   void SetColourMap(wxPalette *cmap) { SetPalette(*cmap); };
 168 #endif
 169   inline wxPalette* GetPalette(void) const { return (M_BITMAPDATA ? (& M_BITMAPDATA->m_bitmapPalette) : (wxPalette*) NULL); }
 170   void SetPalette(const wxPalette& palette);
 171
 172   inline wxMask *GetMask(void) const { return (M_BITMAPDATA ? M_BITMAPDATA->m_bitmapMask : (wxMask*) NULL); }
 173   void SetMask(wxMask *mask) ;
 174
 175   inline wxBitmap& operator = (const wxBitmap& bitmap) { if (*this == bitmap) return (*this); Ref(bitmap); return *this; }
 176
 177   inline bool operator == (const wxBitmap& bitmap) { return m_refData == bitmap.m_refData; }
 178   inline bool operator != (const wxBitmap& bitmap) { return m_refData != bitmap.m_refData; }
 179
 180   // Format handling
 181   static inline wxList& GetHandlers(void) { return sm_handlers; }
 182   static void AddHandler(wxBitmapHandler *handler);
 183   static void InsertHandler(wxBitmapHandler *handler);
 184   static bool RemoveHandler(const wxString& name);
 185   static wxBitmapHandler *FindHandler(const wxString& name);
 186   static wxBitmapHandler *FindHandler(const wxString& extension, long bitmapType);
 187   static wxBitmapHandler *FindHandler(long bitmapType);
 188
 189   static void InitStandardHandlers();
 190   static void CleanUpHandlers();
 191 protected:
 192   static wxList sm_handlers;
 193
 194   // Implementation
 195 public:
 196   void SetHBITMAP(WXHBITMAP bmp);
 197   inline WXHBITMAP GetHBITMAP(void) const { return (M_BITMAPDATA ? M_BITMAPDATA->m_hBitmap : 0); }
 198   inline void SetSelectedInto(wxDC *dc) { if (M_BITMAPDATA) M_BITMAPDATA->m_selectedInto = dc; }
 199   inline wxDC *GetSelectedInto(void) const { return (M_BITMAPDATA ? M_BITMAPDATA->m_selectedInto : (wxDC*) NULL); }
 200   bool FreeResource(bool force = FALSE);
 201
 202   // Creates a bitmap that matches the device context's depth, from
 203   // an arbitray bitmap. At present, the original bitmap must have an
 204   // associated palette. (TODO: use a default palette if no palette exists.)
 205   // This function is necessary for you to Blit an arbitrary bitmap (which may have
 206   // the wrong depth). wxDC::SelectObject will compare the depth of the bitmap
 207   // with the DC's depth, and create a new bitmap if the depths differ.
 208   // Eventually we should perhaps make this a public API function so that
 209   // an app can efficiently produce bitmaps of the correct depth.
 210   // The Windows solution is to use SetDibBits to blit an arbotrary DIB directly to a DC, but
 211   // this is too Windows-specific, hence this solution of quietly converting the wxBitmap.
 212   // Contributed by Frederic Villeneuve <frederic.villeneuve@natinst.com>
 213   wxBitmap GetBitmapForDC(wxDC& dc) const;
 214
 215 };
 216
 217 #endif
 218   // _WX_BITMAP_H_