include/wx/mac/carbon/bitmap.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        bitmap.h
   3 // Purpose:     wxBitmap class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_BITMAP_H_
  13 #define _WX_BITMAP_H_
  14
  15 #include "wx/palette.h"
  16
  17 // Bitmap
  18 class WXDLLEXPORT wxBitmap;
  19 class wxBitmapRefData ;
  20 class WXDLLEXPORT wxBitmapHandler;
  21 class WXDLLEXPORT wxControl;
  22 class WXDLLEXPORT wxCursor;
  23 class WXDLLEXPORT wxDC;
  24 class WXDLLEXPORT wxIcon;
  25 class WXDLLEXPORT wxImage;
  26 class WXDLLEXPORT wxPixelDataBase;
  27
  28 // A mask is a bitmap used for drawing bitmaps
  29 // Internally it is stored as a 8 bit deep memory chunk, 0 = black means the source will be drawn
  30 // 255 = white means the source will not be drawn, no other values will be present
  31 // 8 bit is chosen only for performance reasons, note also that this is the inverse value range
  32 // from alpha, where 0 = invisible , 255 = fully drawn
  33
  34 class WXDLLEXPORT wxMask: public wxObject
  35 {
  36     DECLARE_DYNAMIC_CLASS(wxMask)
  37     DECLARE_NO_COPY_CLASS(wxMask)
  38
  39 public:
  40     wxMask();
  41
  42     // Construct a mask from a bitmap and a colour indicating
  43     // the transparent area
  44     wxMask(const wxBitmap& bitmap, const wxColour& colour);
  45
  46     // Construct a mask from a mono bitmap (black meaning show pixels, white meaning transparent)
  47     wxMask(const wxBitmap& bitmap);
  48
  49     // implementation helper only : construct a mask from a 8 bit memory buffer
  50     wxMask(const wxMemoryBuffer& buf, int width , int height , int bytesPerRow ) ;
  51
  52     ~wxMask();
  53
  54     bool Create(const wxBitmap& bitmap, const wxColour& colour);
  55     bool Create(const wxBitmap& bitmap);
  56     bool Create(const wxMemoryBuffer& buf, int width , int height , int bytesPerRow ) ;
  57
  58     // Implementation below
  59
  60     void Init() ;
  61
  62     // a 8 bit depth mask
  63     void* GetRawAccess() const;
  64     int GetBytesPerRow() const { return m_bytesPerRow ; }
  65     // renders/updates native representation when necessary
  66     void RealizeNative() ;
  67
  68     WXHBITMAP GetHBITMAP() const ;
  69
  70
  71 private:
  72     wxMemoryBuffer m_memBuf ;
  73     int m_bytesPerRow ;
  74     int m_width ;
  75     int m_height ;
  76
  77     WXHBITMAP m_maskBitmap ;
  78
  79 };
  80
  81 class WXDLLEXPORT wxBitmapHandler: public wxBitmapHandlerBase
  82 {
  83 public:
  84     wxBitmapHandler() { }
  85     virtual ~wxBitmapHandler();
  86
  87     virtual bool Create(wxBitmap *bitmap, void *data, long flags, int width, int height, int depth = 1);
  88     virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
  89         int desiredWidth, int desiredHeight);
  90     virtual bool SaveFile(const wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette = NULL);
  91
  92 private:
  93     DECLARE_DYNAMIC_CLASS(wxBitmapHandler)
  94 };
  95
  96 #define M_BITMAPHANDLERDATA ((wxBitmapRefData *)bitmap->GetRefData())
  97
  98 class WXDLLEXPORT wxBitmap: public wxBitmapBase
  99 {
 100     DECLARE_DYNAMIC_CLASS(wxBitmap)
 101
 102     friend class WXDLLEXPORT wxBitmapHandler;
 103
 104 public:
 105     wxBitmap(); // Platform-specific
 106
 107     // Copy constructors
 108     wxBitmap(const wxBitmap& bitmap)
 109         : wxBitmapBase()
 110     {
 111         Ref(bitmap);
 112     }
 113
 114     // Initialize with raw data.
 115     wxBitmap(const char bits[], int width, int height, int depth = 1);
 116
 117     // Initialize with XPM data
 118     bool CreateFromXpm(const char **bits);
 119     wxBitmap(const char **bits);
 120     wxBitmap(char **bits);
 121
 122     // Load a file or resource
 123     wxBitmap(const wxString& name, wxBitmapType type = wxBITMAP_TYPE_PICT_RESOURCE);
 124
 125     // Constructor for generalised creation from data
 126     wxBitmap(void *data, wxBitmapType type, int width, int height, int depth = 1);
 127
 128     // If depth is omitted, will create a bitmap compatible with the display
 129     wxBitmap(int width, int height, int depth = -1);
 130
 131     // Convert from wxImage:
 132     wxBitmap(const wxImage& image, int depth = -1);
 133
 134     // Convert from wxIcon
 135     wxBitmap(const wxIcon& icon) { CopyFromIcon(icon); }
 136
 137     ~wxBitmap();
 138
 139     wxImage ConvertToImage() const;
 140
 141     // get the given part of bitmap
 142     wxBitmap GetSubBitmap( const wxRect& rect ) const;
 143
 144     virtual bool Create(int width, int height, int depth = -1);
 145     virtual bool Create(void *data, wxBitmapType type, int width, int height, int depth = 1);
 146     // virtual bool Create( WXHICON icon) ;
 147     virtual bool LoadFile(const wxString& name, wxBitmapType type = wxBITMAP_TYPE_BMP_RESOURCE);
 148     virtual bool SaveFile(const wxString& name, wxBitmapType type, const wxPalette *cmap = NULL) const;
 149
 150     wxBitmapRefData *GetBitmapData() const
 151         { return (wxBitmapRefData *)m_refData; }
 152
 153     // copies the contents and mask of the given (colour) icon to the bitmap
 154     virtual bool CopyFromIcon(const wxIcon& icon);
 155
 156     bool Ok() const;
 157     int GetWidth() const;
 158     int GetHeight() const;
 159     int GetDepth() const;
 160     void SetWidth(int w);
 161     void SetHeight(int h);
 162     void SetDepth(int d);
 163     void SetOk(bool isOk);
 164
 165 #if WXWIN_COMPATIBILITY_2_4
 166     // these functions do nothing and are only there for backwards
 167     // compatibility
 168     wxDEPRECATED( int GetQuality() const );
 169     wxDEPRECATED( void SetQuality(int quality) );
 170 #endif // WXWIN_COMPATIBILITY_2_4
 171
 172 #if wxUSE_PALETTE
 173     wxPalette* GetPalette() const;
 174     void SetPalette(const wxPalette& palette);
 175 #endif // wxUSE_PALETTE
 176
 177     wxMask *GetMask() const;
 178     void SetMask(wxMask *mask) ;
 179
 180     inline wxBitmap& operator = (const wxBitmap& bitmap) { if (*this == bitmap) return (*this); Ref(bitmap); return *this; }
 181     inline bool operator == (const wxBitmap& bitmap) const { return m_refData == bitmap.m_refData; }
 182     inline bool operator != (const wxBitmap& bitmap) const { return m_refData != bitmap.m_refData; }
 183
 184     static void InitStandardHandlers();
 185
 186     // raw bitmap access support functions, for internal use only
 187     void *GetRawData(wxPixelDataBase& data, int bpp);
 188     void UngetRawData(wxPixelDataBase& data);
 189
 190     // these functions are internal and shouldn't be used, they risk to
 191     // disappear in the future
 192     bool HasAlpha() const;
 193     void UseAlpha();
 194
 195     // returns the 'native' implementation, a GWorldPtr for the content and one for the mask
 196     WXHBITMAP GetHBITMAP( WXHBITMAP * mask = NULL ) const;
 197
 198 #ifdef __WXMAC_OSX__
 199     // returns a CGImageRef which must released after usage with CGImageRelease
 200     WXCGIMAGEREF CGImageCreate() const ;
 201 #endif
 202     // get read only access to the underlying buffer
 203     void *GetRawAccess() const ;
 204     // brackets to the underlying OS structure for read/write access
 205     // makes sure that no cached images will be constructed until terminated
 206     void *BeginRawAccess() ;
 207     void EndRawAccess() ;
 208 };
 209 #endif
 210   // _WX_BITMAP_H_