avoid GCC warning about type-punned pointer breaking strict aliasing rules

[wxWidgets.git] / include / wx / mac / carbon / bitmap.h

diff --git a/include/wx/mac/carbon/bitmap.h b/include/wx/mac/carbon/bitmap.h
index a8e24393623d4ca3bd05f8c7553b194c54ef3073..96664c212916f0898959293460728e1690fbb561 100644 (file)
--- a/include/wx/mac/carbon/bitmap.h
+++ b/include/wx/mac/carbon/bitmap.h
@@ -12,214 +12,175 @@
 #ifndef _WX_BITMAP_H_
 #define _WX_BITMAP_H_
 
 #ifndef _WX_BITMAP_H_
 #define _WX_BITMAP_H_
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-  #pragma interface "bitmap.h"
-#endif
-

 #include "wx/palette.h"
 
 // Bitmap
 #include "wx/palette.h"
 
 // Bitmap

-class WXDLLEXPORT wxBitmap;
-class WXDLLEXPORT wxBitmapHandler;
-class WXDLLEXPORT wxControl;
-class WXDLLEXPORT wxCursor;
-class WXDLLEXPORT wxDC;
-class WXDLLEXPORT wxIcon;
-class WXDLLEXPORT wxImage;
-class WXDLLEXPORT wxPixelDataBase;
+class WXDLLIMPEXP_FWD_CORE wxBitmap;
+class wxBitmapRefData ;
+class WXDLLIMPEXP_FWD_CORE wxBitmapHandler;
+class WXDLLIMPEXP_FWD_CORE wxControl;
+class WXDLLIMPEXP_FWD_CORE wxCursor;
+class WXDLLIMPEXP_FWD_CORE wxDC;
+class WXDLLIMPEXP_FWD_CORE wxIcon;
+class WXDLLIMPEXP_FWD_CORE wxImage;
+class WXDLLIMPEXP_FWD_CORE wxPixelDataBase;

 
 // A mask is a bitmap used for drawing bitmaps
 
 // A mask is a bitmap used for drawing bitmaps

-// it can be a monochrome bitmap or a multi-bit bitmap which transfers to alpha channels
-// transparently.
+// Internally it is stored as a 8 bit deep memory chunk, 0 = black means the source will be drawn
+// 255 = white means the source will not be drawn, no other values will be present
+// 8 bit is chosen only for performance reasons, note also that this is the inverse value range
+// from alpha, where 0 = invisible , 255 = fully drawn
+

 class WXDLLEXPORT wxMask: public wxObject
 {
     DECLARE_DYNAMIC_CLASS(wxMask)
 class WXDLLEXPORT wxMask: public wxObject
 {
     DECLARE_DYNAMIC_CLASS(wxMask)

-    DECLARE_NO_COPY_CLASS(wxMask)

 
 public:
 
 public:

-  wxMask();
+    wxMask();

 
 

-  // Construct a mask from a bitmap and a colour indicating
-  // the transparent area
-  wxMask(const wxBitmap& bitmap, const wxColour& colour);
+    // Copy constructor
+    wxMask(const wxMask& mask);

 
 

-  // Construct a mask from a bitmap and a palette index indicating
-  // the transparent area
-  wxMask(const wxBitmap& bitmap, int paletteIndex);
+    // Construct a mask from a bitmap and a colour indicating
+    // the transparent area
+    wxMask(const wxBitmap& bitmap, const wxColour& colour);

 
 

-  // Construct a mask from a mono bitmap (copies the bitmap).
-  wxMask(const wxBitmap& bitmap);
+    // Construct a mask from a mono bitmap (black meaning show pixels, white meaning transparent)
+    wxMask(const wxBitmap& bitmap);

 
 

-  ~wxMask();
+    // implementation helper only : construct a mask from a 32 bit memory buffer
+    wxMask(const wxMemoryBuffer& buf, int width , int height , int bytesPerRow ) ;

 
 

-  bool Create(const wxBitmap& bitmap, const wxColour& colour);
-  bool Create(const wxBitmap& bitmap, int paletteIndex);
-  bool Create(const wxBitmap& bitmap);
+    virtual ~wxMask();

 
 

-  // Implementation
-  bool PointMasked(int x, int y);
-  inline WXHBITMAP GetMaskBitmap() const { return m_maskBitmap; }
-  inline void SetMaskBitmap(WXHBITMAP bmp) { m_maskBitmap = bmp; }
-  int GetDepth() const { return m_depth ; }
-  void SetDepth( int depth ) { m_depth = depth ; }
-protected:
-  WXHBITMAP m_maskBitmap;
-  int m_depth ;
-};
+    bool Create(const wxBitmap& bitmap, const wxColour& colour);
+    bool Create(const wxBitmap& bitmap);
+    bool Create(const wxMemoryBuffer& buf, int width , int height , int bytesPerRow ) ;

 
 

-enum { kMacBitmapTypeUnknownType , kMacBitmapTypeGrafWorld, kMacBitmapTypePict , kMacBitmapTypeIcon } ;
+    // Implementation below

 
 

-class WXDLLEXPORT wxBitmapRefData: public wxGDIRefData
-{
-    DECLARE_NO_COPY_CLASS(wxBitmapRefData)
-        
-    friend class WXDLLEXPORT wxBitmap;
-    friend class WXDLLEXPORT wxIcon;
-    friend class WXDLLEXPORT wxCursor;
-public:
-    wxBitmapRefData();
-    ~wxBitmapRefData();
+    void Init() ;

 
 

-public:
-  int           m_width;
-  int           m_height;
-  int           m_depth;
-  bool          m_ok;
-  int           m_numColors;
-#if wxUSE_PALETTE
-  wxPalette     m_bitmapPalette;
-#endif // wxUSE_PALETTE
-  int           m_quality;
-
-  int            m_bitmapType ;
-  WXHMETAFILE    m_hPict ;
-  WXHBITMAP     m_hBitmap;
-  WXHICON       m_hIcon ;
-  wxMask *      m_bitmapMask; // Optional mask
-  bool          m_hasAlpha;
-};
+    // a 8 bit depth mask
+    void* GetRawAccess() const;
+    int GetBytesPerRow() const { return m_bytesPerRow ; }
+    // renders/updates native representation when necessary
+    void RealizeNative() ;

 
 

-#define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
+    WXHBITMAP GetHBITMAP() const ;

 
 

-class WXDLLEXPORT wxBitmapHandler: public wxBitmapHandlerBase
-{
-  DECLARE_DYNAMIC_CLASS(wxBitmapHandler)
-public:
-  wxBitmapHandler() : m_name(), m_extension(), m_type(0) { }
-  virtual ~wxBitmapHandler();

 
 

-  virtual bool Create(wxBitmap *bitmap, void *data, long flags, int width, int height, int depth = 1);
-  virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
-      int desiredWidth, int desiredHeight);
-  virtual bool SaveFile(const wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette = NULL);
+private:
+    wxMemoryBuffer m_memBuf ;
+    int m_bytesPerRow ;
+    int m_width ;
+    int m_height ;

 
 

-  void SetName(const wxString& name) { m_name = name; }
-  void SetExtension(const wxString& ext) { m_extension = ext; }
-  void SetType(long type) { m_type = type; }
-  wxString GetName() const { return m_name; }
-  wxString GetExtension() const { return m_extension; }
-  long GetType() const { return m_type; }
+    WXHBITMAP m_maskBitmap ;

 
 

-protected:
-  wxString  m_name;
-  wxString  m_extension;
-  long      m_type;

 };
 
 };
 

-#define M_BITMAPHANDLERDATA ((wxBitmapRefData *)bitmap->GetRefData())
+class WXDLLIMPEXP_CORE wxBitmapHandler: public wxBitmapHandlerBase
+{
+    DECLARE_ABSTRACT_CLASS(wxBitmapHandler)
+};

 
 class WXDLLEXPORT wxBitmap: public wxBitmapBase
 {
 
 class WXDLLEXPORT wxBitmap: public wxBitmapBase
 {

-  DECLARE_DYNAMIC_CLASS(wxBitmap)
+    DECLARE_DYNAMIC_CLASS(wxBitmap)

 
 

-  friend class WXDLLEXPORT wxBitmapHandler;
+    friend class WXDLLIMPEXP_FWD_CORE wxBitmapHandler;

 
 public:
 
 public:

-  wxBitmap(); // Platform-specific
-
-  // Copy constructors
-  wxBitmap(const wxBitmap& bitmap)
-      : wxBitmapBase()
-  { Ref(bitmap); }
-
-  // Initialize with raw data.
-  wxBitmap(const char bits[], int width, int height, int depth = 1);
-
-  // Initialize with XPM data
-  bool CreateFromXpm(const char **bits);
-  wxBitmap(const char **bits);
-  wxBitmap(char **bits);
-
-  // Load a file or resource
-  wxBitmap(const wxString& name, wxBitmapType type = wxBITMAP_TYPE_PICT_RESOURCE);
-
-  // Constructor for generalised creation from data
-  wxBitmap(void *data, wxBitmapType type, int width, int height, int depth = 1);
-
-  // If depth is omitted, will create a bitmap compatible with the display
-  wxBitmap(int width, int height, int depth = -1);
-  
-  // Convert from wxImage:
-  wxBitmap(const wxImage& image, int depth = -1);
-  
-  ~wxBitmap();
-  
-  wxImage ConvertToImage() const;
-
-  // get the given part of bitmap
-  wxBitmap GetSubBitmap( const wxRect& rect ) const;
-
-  virtual bool Create(int width, int height, int depth = -1);
-  virtual bool Create(void *data, wxBitmapType type, int width, int height, int depth = 1);
-  virtual bool LoadFile(const wxString& name, wxBitmapType type = wxBITMAP_TYPE_BMP_RESOURCE);
-  virtual bool SaveFile(const wxString& name, wxBitmapType type, const wxPalette *cmap = NULL) const;
-
-  // copies the contents and mask of the given (colour) icon to the bitmap
-  virtual bool CopyFromIcon(const wxIcon& icon);
-
-  bool Ok() const;
-  int GetWidth() const;
-  int GetHeight() const;
-  int GetDepth() const;
-  int GetQuality() const;
-  void SetWidth(int w);
-  void SetHeight(int h);
-  void SetDepth(int d);
-  void SetQuality(int q);
-  void SetOk(bool isOk);
+    wxBitmap(); // Platform-specific
+
+    // Initialize with raw data.
+    wxBitmap(const char bits[], int width, int height, int depth = 1);
+
+    // Initialize with XPM data
+    wxBitmap(const char* const* bits);
+
+    // Load a file or resource
+    wxBitmap(const wxString& name, wxBitmapType type = wxBITMAP_TYPE_PICT_RESOURCE);
+
+    // Constructor for generalised creation from data
+    wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth = 1);
+
+    // If depth is omitted, will create a bitmap compatible with the display
+    wxBitmap(int width, int height, int depth = -1);
+
+    // Convert from wxImage:
+    wxBitmap(const wxImage& image, int depth = -1);
+
+    // Convert from wxIcon
+    wxBitmap(const wxIcon& icon) { CopyFromIcon(icon); }
+
+    virtual ~wxBitmap();
+
+    wxImage ConvertToImage() const;
+
+    // get the given part of bitmap
+    wxBitmap GetSubBitmap( const wxRect& rect ) const;
+
+    virtual bool Create(int width, int height, int depth = -1);
+    virtual bool Create(const void* data, wxBitmapType type, int width, int height, int depth = 1);
+    // virtual bool Create( WXHICON icon) ;
+    virtual bool LoadFile(const wxString& name, wxBitmapType type = wxBITMAP_TYPE_BMP_RESOURCE);
+    virtual bool SaveFile(const wxString& name, wxBitmapType type, const wxPalette *cmap = NULL) const;
+
+    wxBitmapRefData *GetBitmapData() const
+        { return (wxBitmapRefData *)m_refData; }
+
+    // copies the contents and mask of the given (colour) icon to the bitmap
+    virtual bool CopyFromIcon(const wxIcon& icon);
+
+    int GetWidth() const;
+    int GetHeight() const;
+    int GetDepth() const;
+    void SetWidth(int w);
+    void SetHeight(int h);
+    void SetDepth(int d);
+    void SetOk(bool isOk);

 
 #if wxUSE_PALETTE
 
 #if wxUSE_PALETTE

-   wxPalette* GetPalette() const;
-   void SetPalette(const wxPalette& palette);
+    wxPalette* GetPalette() const;
+    void SetPalette(const wxPalette& palette);

 #endif // wxUSE_PALETTE
 
 #endif // wxUSE_PALETTE
 

-  wxMask *GetMask() const;
-  void SetMask(wxMask *mask) ;
-
-  int GetBitmapType() const;
-  
-  inline wxBitmap& operator = (const wxBitmap& bitmap) { if (*this == bitmap) return (*this); Ref(bitmap); return *this; }
-  inline bool operator == (const wxBitmap& bitmap) const { return m_refData == bitmap.m_refData; }
-  inline bool operator != (const wxBitmap& bitmap) const { return m_refData != bitmap.m_refData; }
+    wxMask *GetMask() const;
+    void SetMask(wxMask *mask) ;

 
 

-  static void InitStandardHandlers();
+    static void InitStandardHandlers();

 
     // raw bitmap access support functions, for internal use only
     void *GetRawData(wxPixelDataBase& data, int bpp);
     void UngetRawData(wxPixelDataBase& data);
 
 
     // raw bitmap access support functions, for internal use only
     void *GetRawData(wxPixelDataBase& data, int bpp);
     void UngetRawData(wxPixelDataBase& data);
 

+    // these functions are internal and shouldn't be used, they risk to
+    // disappear in the future
+    bool HasAlpha() const;

     void UseAlpha();
 
     void UseAlpha();
 

-public:
-  WXHBITMAP GetHBITMAP() const;
-  inline WXHICON GetHICON() const { return (M_BITMAPDATA ? M_BITMAPDATA->m_hIcon : 0); }
-  WXHMETAFILE GetPict(bool *created = NULL ) const;
+    // returns the 'native' implementation, a GWorldPtr for the content and one for the mask
+    WXHBITMAP GetHBITMAP( WXHBITMAP * mask = NULL ) const;
+
+    // returns a CGImageRef which must released after usage with CGImageRelease
+    CGImageRef CreateCGImage() const ;

 
 

-  void SetHBITMAP(WXHBITMAP bmp);
-  void SetHICON(WXHICON ico);
-  void SetPict( WXHMETAFILE pict ) ;
+    // returns a IconRef which must be retained before and released after usage
+    IconRef GetIconRef() const;
+    // returns a IconRef which must be released after usage
+    IconRef CreateIconRef() const;
+    // get read only access to the underlying buffer
+    void *GetRawAccess() const ;
+    // brackets to the underlying OS structure for read/write access
+    // makes sure that no cached images will be constructed until terminated
+    void *BeginRawAccess() ;
+    void EndRawAccess() ;

 
 

-  bool FreeResource(bool force = FALSE);
+protected:
+    virtual wxGDIRefData *CreateGDIRefData() const;
+    virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;

 };
 };

-#endif
-  // _WX_BITMAP_H_
+
+#endif // _WX_BITMAP_H_