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
  38 public:
  39     wxMask();
  40
  41     // Copy constructor
  42     wxMask(const wxMask& mask);
  43
  44     // Construct a mask from a bitmap and a colour indicating
  45     // the transparent area
  46     wxMask(const wxBitmap& bitmap, const wxColour& colour);
  47
  48     // Construct a mask from a mono bitmap (black meaning show pixels, white meaning transparent)
  49     wxMask(const wxBitmap& bitmap);
  50
  51     // implementation helper only : construct a mask from a 32 bit memory buffer
  52     wxMask(const wxMemoryBuffer& buf, int width , int height , int bytesPerRow ) ;
  53
  54     virtual ~wxMask();
  55
  56     bool Create(const wxBitmap& bitmap, const wxColour& colour);
  57     bool Create(const wxBitmap& bitmap);
  58     bool Create(const wxMemoryBuffer& buf, int width , int height , int bytesPerRow ) ;
  59
  60     // Implementation below
  61
  62     void Init() ;
  63
  64     // a 8 bit depth mask
  65     void* GetRawAccess() const;
  66     int GetBytesPerRow() const { return m_bytesPerRow ; }
  67     // renders/updates native representation when necessary
  68     void RealizeNative() ;
  69
  70     WXHBITMAP GetHBITMAP() const ;
  71
  72
  73 private:
  74     wxMemoryBuffer m_memBuf ;
  75     int m_bytesPerRow ;
  76     int m_width ;
  77     int m_height ;
  78
  79     WXHBITMAP m_maskBitmap ;
  80
  81 };
  82
  83 class WXDLLIMPEXP_CORE wxBitmapHandler: public wxBitmapHandlerBase
  84 {
  85     DECLARE_ABSTRACT_CLASS(wxBitmapHandler)
  86 };
  87
  88 class WXDLLEXPORT wxBitmap: public wxBitmapBase
  89 {
  90     DECLARE_DYNAMIC_CLASS(wxBitmap)
  91
  92     friend class WXDLLEXPORT wxBitmapHandler;
  93
  94 public:
  95     wxBitmap(); // Platform-specific
  96
  97     // Initialize with raw data.
  98     wxBitmap(const char bits[], int width, int height, int depth = 1);
  99
 100     // Initialize with XPM data
 101     wxBitmap(const char* const* bits);
 102
 103     // Load a file or resource
 104     wxBitmap(const wxString& name, wxBitmapType type = wxBITMAP_TYPE_PICT_RESOURCE);
 105
 106     // Constructor for generalised creation from data
 107     wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth = 1);
 108
 109     // If depth is omitted, will create a bitmap compatible with the display
 110     wxBitmap(int width, int height, int depth = -1);
 111
 112     // Convert from wxImage:
 113     wxBitmap(const wxImage& image, int depth = -1);
 114
 115     // Convert from wxIcon
 116     wxBitmap(const wxIcon& icon) { CopyFromIcon(icon); }
 117
 118     virtual ~wxBitmap();
 119
 120     wxImage ConvertToImage() const;
 121
 122     // get the given part of bitmap
 123     wxBitmap GetSubBitmap( const wxRect& rect ) const;
 124
 125     virtual bool Create(int width, int height, int depth = -1);
 126     virtual bool Create(const void* data, wxBitmapType type, int width, int height, int depth = 1);
 127     // virtual bool Create( WXHICON icon) ;
 128     virtual bool LoadFile(const wxString& name, wxBitmapType type = wxBITMAP_TYPE_BMP_RESOURCE);
 129     virtual bool SaveFile(const wxString& name, wxBitmapType type, const wxPalette *cmap = NULL) const;
 130
 131     wxBitmapRefData *GetBitmapData() const
 132         { return (wxBitmapRefData *)m_refData; }
 133
 134     // copies the contents and mask of the given (colour) icon to the bitmap
 135     virtual bool CopyFromIcon(const wxIcon& icon);
 136
 137     bool Ok() const { return IsOk(); }
 138     bool IsOk() const;
 139     int GetWidth() const;
 140     int GetHeight() const;
 141     int GetDepth() const;
 142     void SetWidth(int w);
 143     void SetHeight(int h);
 144     void SetDepth(int d);
 145     void SetOk(bool isOk);
 146
 147 #if wxUSE_PALETTE
 148     wxPalette* GetPalette() const;
 149     void SetPalette(const wxPalette& palette);
 150 #endif // wxUSE_PALETTE
 151
 152     wxMask *GetMask() const;
 153     void SetMask(wxMask *mask) ;
 154
 155     static void InitStandardHandlers();
 156
 157     // raw bitmap access support functions, for internal use only
 158     void *GetRawData(wxPixelDataBase& data, int bpp);
 159     void UngetRawData(wxPixelDataBase& data);
 160
 161     // these functions are internal and shouldn't be used, they risk to
 162     // disappear in the future
 163     bool HasAlpha() const;
 164     void UseAlpha();
 165
 166     // returns the 'native' implementation, a GWorldPtr for the content and one for the mask
 167     WXHBITMAP GetHBITMAP( WXHBITMAP * mask = NULL ) const;
 168
 169 #ifdef __WXMAC_OSX__
 170     // returns a CGImageRef which must released after usage with CGImageRelease
 171     WXCGIMAGEREF CGImageCreate() const ;
 172 #endif
 173     // get read only access to the underlying buffer
 174     void *GetRawAccess() const ;
 175     // brackets to the underlying OS structure for read/write access
 176     // makes sure that no cached images will be constructed until terminated
 177     void *BeginRawAccess() ;
 178     void EndRawAccess() ;
 179
 180 protected:
 181     // ref counting code
 182     virtual wxObjectRefData *CreateRefData() const;
 183     virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
 184 };
 185 #endif
 186   // _WX_BITMAP_H_