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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16   #pragma interface "bitmap.h"
  17 #endif
  18
  19 #include "wx/palette.h"
  20
  21 // Bitmap
  22 class WXDLLEXPORT wxBitmap;
  23 class wxBitmapRefData ;
  24 class WXDLLEXPORT wxBitmapHandler;
  25 class WXDLLEXPORT wxControl;
  26 class WXDLLEXPORT wxCursor;
  27 class WXDLLEXPORT wxDC;
  28 class WXDLLEXPORT wxIcon;
  29 class WXDLLEXPORT wxImage;
  30 class WXDLLEXPORT wxPixelDataBase;
  31
  32 // A mask is a bitmap used for drawing bitmaps
  33 // Internally it is stored as a 8 bit deep memory chunk, 0 = black means the source will be drawn
  34 // 255 = white means the source will not be drawn, no other values will be present
  35 // 8 bit is chosen only for performance reasons, note also that this is the inverse value range
  36 // from alpha, where 0 = invisible , 255 = fully drawn
  37
  38 class WXDLLEXPORT wxMask: public wxObject
  39 {
  40     DECLARE_DYNAMIC_CLASS(wxMask)
  41     DECLARE_NO_COPY_CLASS(wxMask)
  42
  43 public:
  44     wxMask();
  45
  46     // Construct a mask from a bitmap and a colour indicating
  47     // the transparent area
  48     wxMask(const wxBitmap& bitmap, const wxColour& colour);
  49
  50     // Construct a mask from a mono bitmap (black meaning show pixels, white meaning transparent)
  51     wxMask(const wxBitmap& bitmap);
  52
  53     // implementation helper only : construct a mask from a 8 bit memory buffer
  54     wxMask(const wxMemoryBuffer& buf, int width , int height , int bytesPerRow ) ;
  55
  56     ~wxMask();
  57
  58     bool Create(const wxBitmap& bitmap, const wxColour& colour);
  59     bool Create(const wxBitmap& bitmap);
  60     bool Create(const wxMemoryBuffer& buf, int width , int height , int bytesPerRow ) ;
  61
  62     // Implementation below
  63
  64     void Init() ;
  65
  66     // a 8 bit depth mask
  67     void* GetRawAccess() const;
  68     int GetBytesPerRow() const { return m_bytesPerRow ; }
  69     // renders/updates native representation when necessary
  70     void RealizeNative() ;
  71
  72     WXHBITMAP GetHBITMAP() const ;
  73
  74
  75 private:
  76     wxMemoryBuffer m_memBuf ;
  77     int m_bytesPerRow ;
  78     int m_width ;
  79     int m_height ;
  80
  81     WXHBITMAP m_maskBitmap ;
  82
  83 };
  84
  85 class WXDLLEXPORT wxBitmapHandler: public wxBitmapHandlerBase
  86 {
  87 public:
  88     wxBitmapHandler() { }
  89     virtual ~wxBitmapHandler();
  90
  91     virtual bool Create(wxBitmap *bitmap, void *data, long flags, int width, int height, int depth = 1);
  92     virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
  93         int desiredWidth, int desiredHeight);
  94     virtual bool SaveFile(const wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette = NULL);
  95
  96 private:
  97     DECLARE_DYNAMIC_CLASS(wxBitmapHandler)
  98 };
  99
 100 #define M_BITMAPHANDLERDATA ((wxBitmapRefData *)bitmap->GetRefData())
 101
 102 class WXDLLEXPORT wxBitmap: public wxBitmapBase
 103 {
 104     DECLARE_DYNAMIC_CLASS(wxBitmap)
 105
 106     friend class WXDLLEXPORT wxBitmapHandler;
 107
 108 public:
 109     wxBitmap(); // Platform-specific
 110
 111     // Copy constructors
 112     wxBitmap(const wxBitmap& bitmap)
 113         : wxBitmapBase()
 114     {
 115         Ref(bitmap);
 116     }
 117
 118     // Initialize with raw data.
 119     wxBitmap(const char bits[], int width, int height, int depth = 1);
 120
 121     // Initialize with XPM data
 122     bool CreateFromXpm(const char **bits);
 123     wxBitmap(const char **bits);
 124     wxBitmap(char **bits);
 125
 126     // Load a file or resource
 127     wxBitmap(const wxString& name, wxBitmapType type = wxBITMAP_TYPE_PICT_RESOURCE);
 128
 129     // Constructor for generalised creation from data
 130     wxBitmap(void *data, wxBitmapType type, int width, int height, int depth = 1);
 131
 132     // If depth is omitted, will create a bitmap compatible with the display
 133     wxBitmap(int width, int height, int depth = -1);
 134
 135     // Convert from wxImage:
 136     wxBitmap(const wxImage& image, int depth = -1);
 137
 138     // Convert from wxIcon
 139     wxBitmap(const wxIcon& icon) { CopyFromIcon(icon); }
 140
 141     ~wxBitmap();
 142
 143     wxImage ConvertToImage() const;
 144
 145     // get the given part of bitmap
 146     wxBitmap GetSubBitmap( const wxRect& rect ) const;
 147
 148     virtual bool Create(int width, int height, int depth = -1);
 149     virtual bool Create(void *data, wxBitmapType type, int width, int height, int depth = 1);
 150     // virtual bool Create( WXHICON icon) ;
 151     virtual bool LoadFile(const wxString& name, wxBitmapType type = wxBITMAP_TYPE_BMP_RESOURCE);
 152     virtual bool SaveFile(const wxString& name, wxBitmapType type, const wxPalette *cmap = NULL) const;
 153
 154     wxBitmapRefData *GetBitmapData() const
 155         { return (wxBitmapRefData *)m_refData; }
 156
 157     // copies the contents and mask of the given (colour) icon to the bitmap
 158     virtual bool CopyFromIcon(const wxIcon& icon);
 159
 160     bool Ok() const;
 161     int GetWidth() const;
 162     int GetHeight() const;
 163     int GetDepth() const;
 164     void SetWidth(int w);
 165     void SetHeight(int h);
 166     void SetDepth(int d);
 167     void SetOk(bool isOk);
 168
 169 #if WXWIN_COMPATIBILITY_2_4
 170     // these functions do nothing and are only there for backwards
 171     // compatibility
 172     wxDEPRECATED( int GetQuality() const );
 173     wxDEPRECATED( void SetQuality(int quality) );
 174 #endif // WXWIN_COMPATIBILITY_2_4
 175
 176 #if wxUSE_PALETTE
 177     wxPalette* GetPalette() const;
 178     void SetPalette(const wxPalette& palette);
 179 #endif // wxUSE_PALETTE
 180
 181     wxMask *GetMask() const;
 182     void SetMask(wxMask *mask) ;
 183
 184     inline wxBitmap& operator = (const wxBitmap& bitmap) { if (*this == bitmap) return (*this); Ref(bitmap); return *this; }
 185     inline bool operator == (const wxBitmap& bitmap) const { return m_refData == bitmap.m_refData; }
 186     inline bool operator != (const wxBitmap& bitmap) const { return m_refData != bitmap.m_refData; }
 187
 188     static void InitStandardHandlers();
 189
 190     // raw bitmap access support functions, for internal use only
 191     void *GetRawData(wxPixelDataBase& data, int bpp);
 192     void UngetRawData(wxPixelDataBase& data);
 193
 194     // these functions are internal and shouldn't be used, they risk to
 195     // disappear in the future
 196     bool HasAlpha() const;
 197     void UseAlpha();
 198
 199     // returns the 'native' implementation, a GWorldPtr for the content and one for the mask
 200     WXHBITMAP GetHBITMAP( WXHBITMAP * mask = NULL ) const;
 201
 202 #ifdef __WXMAC_OSX__
 203     // returns a CGImageRef which must released after usage with CGImageRelease
 204     WXCGIMAGEREF CGImageCreate() const ;
 205 #endif
 206     // get read only access to the underlying buffer
 207     void *GetRawAccess() const ;
 208     // brackets to the underlying OS structure for read/write access
 209     // makes sure that no cached images will be constructed until terminated
 210     void *BeginRawAccess() ;
 211     void EndRawAccess() ;
 212 };
 213 #endif
 214   // _WX_BITMAP_H_