Inversed slider and wrapper for datepicker control on PalmOS. WinHandle instead of...

[wxWidgets.git] / include / wx / image.h

diff --git a/include/wx/image.h b/include/wx/image.h
index af2bd95b709037162cf41dd3ca17e811ddc23305..6fb884955b062e61ec306cf1a72bd836aafffd03 100644 (file)
--- a/include/wx/image.h
+++ b/include/wx/image.h
@@ -10,7 +10,7 @@
 #ifndef _WX_IMAGE_H_
 #define _WX_IMAGE_H_
 
 #ifndef _WX_IMAGE_H_
 #define _WX_IMAGE_H_
 

-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)

 #pragma interface "image.h"
 #endif
 
 #pragma interface "image.h"
 #endif
 


@@ -18,18 +18,27 @@
 #include "wx/object.h"
 #include "wx/string.h"
 #include "wx/gdicmn.h"
 #include "wx/object.h"
 #include "wx/string.h"
 #include "wx/gdicmn.h"

-#include "wx/bitmap.h"
+#include "wx/hashmap.h"

 
 #if wxUSE_STREAMS
 #  include "wx/stream.h"
 #endif
 
 
 #if wxUSE_STREAMS
 #  include "wx/stream.h"
 #endif
 

+#if wxUSE_IMAGE
+
+// on some systems (Unixware 7.x) index is defined as a macro in the headers
+// which breaks the compilation below
+#undef index
+
+#define wxIMAGE_OPTION_FILENAME wxString(_T("FileName"))
+

 //-----------------------------------------------------------------------------
 // classes
 //-----------------------------------------------------------------------------
 
 class WXDLLEXPORT wxImageHandler;
 class WXDLLEXPORT wxImage;
 //-----------------------------------------------------------------------------
 // classes
 //-----------------------------------------------------------------------------
 
 class WXDLLEXPORT wxImageHandler;
 class WXDLLEXPORT wxImage;

+class WXDLLEXPORT wxPalette;

 
 //-----------------------------------------------------------------------------
 // wxImageHandler
 
 //-----------------------------------------------------------------------------
 // wxImageHandler


@@ -38,15 +47,17 @@ class WXDLLEXPORT wxImage;
 class WXDLLEXPORT wxImageHandler: public wxObject
 {
 public:
 class WXDLLEXPORT wxImageHandler: public wxObject
 {
 public:

-    wxImageHandler() { m_name = ""; m_extension = ""; m_type = 0; }
+    wxImageHandler()
+        : m_name(wxEmptyString), m_extension(wxEmptyString), m_mime(), m_type(0)
+        { }

 
 #if wxUSE_STREAMS
 
 #if wxUSE_STREAMS

-    virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=TRUE, int index=0 );
-    virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=TRUE );
+    virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=true, int index=-1 );
+    virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=true );

 
     virtual int GetImageCount( wxInputStream& stream );
 
 
     virtual int GetImageCount( wxInputStream& stream );
 

-    bool CanRead( wxInputStream& stream ) { return DoCanRead(stream); }
+    bool CanRead( wxInputStream& stream ) { return CallDoCanRead(stream); }

     bool CanRead( const wxString& name );
 #endif // wxUSE_STREAMS
 
     bool CanRead( const wxString& name );
 #endif // wxUSE_STREAMS
 


@@ -62,127 +73,224 @@ public:
 protected:
 #if wxUSE_STREAMS
     virtual bool DoCanRead( wxInputStream& stream ) = 0;
 protected:
 #if wxUSE_STREAMS
     virtual bool DoCanRead( wxInputStream& stream ) = 0;

+
+    // save the stream position, call DoCanRead() and restore the position
+    bool CallDoCanRead(wxInputStream& stream);

 #endif // wxUSE_STREAMS
 
     wxString  m_name;
     wxString  m_extension;
     wxString  m_mime;
     long      m_type;
 #endif // wxUSE_STREAMS
 
     wxString  m_name;
     wxString  m_extension;
     wxString  m_mime;
     long      m_type;

-    
+

 private:
     DECLARE_CLASS(wxImageHandler)
 };
 
 //-----------------------------------------------------------------------------
 private:
     DECLARE_CLASS(wxImageHandler)
 };
 
 //-----------------------------------------------------------------------------

-// wxImage
+// wxImageHistogram

 //-----------------------------------------------------------------------------
 
 //-----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxHNode
+class WXDLLEXPORT wxImageHistogramEntry

 {
 public:
 {
 public:

+    wxImageHistogramEntry() { index = value = 0; }

     unsigned long index;
     unsigned long value;
 };
 
     unsigned long index;
     unsigned long value;
 };
 

+WX_DECLARE_EXPORTED_HASH_MAP(unsigned long, wxImageHistogramEntry,
+                             wxIntegerHash, wxIntegerEqual,
+                             wxImageHistogramBase);
+
+class WXDLLEXPORT wxImageHistogram : public wxImageHistogramBase
+{
+public:
+    wxImageHistogram() : wxImageHistogramBase(256) { }
+
+    // get the key in the histogram for the given RGB values
+    static unsigned long MakeKey(unsigned char r,
+                                 unsigned char g,
+                                 unsigned char b)
+    {
+        return (r << 16) | (g << 8) | b;
+    }
+
+    // find first colour that is not used in the image and has higher
+    // RGB values than RGB(startR, startG, startB)
+    //
+    // returns true and puts this colour in r, g, b (each of which may be NULL)
+    // on success or returns false if there are no more free colours
+    bool FindFirstUnusedColour(unsigned char *r,
+                               unsigned char *g,
+                               unsigned char *b,
+                               unsigned char startR = 1,
+                               unsigned char startG = 0,
+                               unsigned char startB = 0 ) const;
+};
+
+//-----------------------------------------------------------------------------
+// wxImage
+//-----------------------------------------------------------------------------
+

 class WXDLLEXPORT wxImage: public wxObject
 {
 public:
 class WXDLLEXPORT wxImage: public wxObject
 {
 public:

-    wxImage();
-    wxImage( int width, int height );
-    wxImage( int width, int height, unsigned char* data, bool static_data = FALSE );
-    wxImage( const wxString& name, long type = wxBITMAP_TYPE_ANY );
-    wxImage( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
-    wxImage( const wxString& name, const wxString& mimetype );
-    wxImage( wxInputStream& stream, const wxString& mimetype );
+    wxImage(){}
+    wxImage( int width, int height, bool clear = true );
+    wxImage( int width, int height, unsigned char* data, bool static_data = false );
+    wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false );
+    wxImage( const wxString& name, long type = wxBITMAP_TYPE_ANY, int index = -1 );
+    wxImage( const wxString& name, const wxString& mimetype, int index = -1 );
+
+#if wxUSE_STREAMS
+    wxImage( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY, int index = -1 );
+    wxImage( wxInputStream& stream, const wxString& mimetype, int index = -1 );
+#endif // wxUSE_STREAMS

 
     wxImage( const wxImage& image );
     wxImage( const wxImage* image );
 
 
     wxImage( const wxImage& image );
     wxImage( const wxImage* image );
 

-    wxImage( const wxBitmap &bitmap );
-    operator wxBitmap() const { return ConvertToBitmap(); }
-    wxBitmap ConvertToBitmap() const;
-#ifdef __WXGTK__
-    wxBitmap ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue );
-#endif
-
-    void Create( int width, int height );
-    void Create( int width, int height, unsigned char* data, bool static_data = FALSE );
+    bool Create( int width, int height, bool clear = true );
+    bool Create( int width, int height, unsigned char* data, bool static_data = false );
+    bool Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false );

     void Destroy();
 
     // creates an identical copy of the image (the = operator
     // just raises the ref count)
     wxImage Copy() const;
     void Destroy();
 
     // creates an identical copy of the image (the = operator
     // just raises the ref count)
     wxImage Copy() const;

-    
+

     // return the new image with size width*height
     wxImage GetSubImage( const wxRect& ) const;
     // return the new image with size width*height
     wxImage GetSubImage( const wxRect& ) const;

-    
+

     // pastes image into this instance and takes care of
     // the mask colour and out of bounds problems
     // pastes image into this instance and takes care of
     // the mask colour and out of bounds problems

-    void Paste( const wxImage &image, int x, int y );    
+    void Paste( const wxImage &image, int x, int y );

 
     // return the new image with size width*height
     wxImage Scale( int width, int height ) const;
 
 
     // return the new image with size width*height
     wxImage Scale( int width, int height ) const;
 

+    wxImage ShrinkBy( int xFactor , int yFactor ) const ;
+

     // rescales the image in place
     wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); }
 
     // Rotates the image about the given point, 'angle' radians.
     // Returns the rotated image, leaving this image intact.
     wxImage Rotate(double angle, const wxPoint & centre_of_rotation,
     // rescales the image in place
     wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); }
 
     // Rotates the image about the given point, 'angle' radians.
     // Returns the rotated image, leaving this image intact.
     wxImage Rotate(double angle, const wxPoint & centre_of_rotation,

-                   bool interpolating = TRUE, wxPoint * offset_after_rotation = (wxPoint*) NULL) const;
+                   bool interpolating = true, wxPoint * offset_after_rotation = (wxPoint*) NULL) const;

 
 

-    wxImage Rotate90( bool clockwise = TRUE ) const;
-    wxImage Mirror( bool horizontally = TRUE ) const;
+    wxImage Rotate90( bool clockwise = true ) const;
+    wxImage Mirror( bool horizontally = true ) const;

 
     // replace one colour with another
     void Replace( unsigned char r1, unsigned char g1, unsigned char b1,
                   unsigned char r2, unsigned char g2, unsigned char b2 );
 
 
     // replace one colour with another
     void Replace( unsigned char r1, unsigned char g1, unsigned char b1,
                   unsigned char r2, unsigned char g2, unsigned char b2 );
 

+    // convert to monochrome image (<r,g,b> will be replaced by white,
+    // everything else by black)
+    wxImage ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const;
+

     // these routines are slow but safe
     void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
     unsigned char GetRed( int x, int y ) const;
     unsigned char GetGreen( int x, int y ) const;
     unsigned char GetBlue( int x, int y ) const;
 
     // these routines are slow but safe
     void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
     unsigned char GetRed( int x, int y ) const;
     unsigned char GetGreen( int x, int y ) const;
     unsigned char GetBlue( int x, int y ) const;
 

+    void SetAlpha(int x, int y, unsigned char alpha);
+    unsigned char GetAlpha(int x, int y) const;
+
+    // find first colour that is not used in the image and has higher
+    // RGB values than <startR,startG,startB>
+    bool FindFirstUnusedColour( unsigned char *r, unsigned char *g, unsigned char *b,
+                                unsigned char startR = 1, unsigned char startG = 0,
+                                unsigned char startB = 0 ) const;
+    // Set image's mask to the area of 'mask' that has <r,g,b> colour
+    bool SetMaskFromImage(const wxImage & mask,
+                          unsigned char mr, unsigned char mg, unsigned char mb);
+
+    // converts image's alpha channel to mask, if it has any, does nothing
+    // otherwise:
+    bool ConvertAlphaToMask(unsigned char threshold = 128);
+
+    // This method converts an image where the original alpha
+    // information is only available as a shades of a colour
+    // (actually shades of grey) typically when you draw anti-
+    // aliased text into a bitmap. The DC drawinf routines
+    // draw grey values on the black background although they
+    // actually mean to draw white with differnt alpha values.
+    // This method reverses it, assuming a black (!) background
+    // and white text (actually only the red channel is read).
+    // The method will then fill up the whole image with the
+    // colour given.
+    bool ConvertColourToAlpha( unsigned char r, unsigned char g, unsigned char b );
+

     static bool CanRead( const wxString& name );
     static bool CanRead( const wxString& name );

-    virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY );
-    virtual bool LoadFile( const wxString& name, const wxString& mimetype );
+    static int GetImageCount( const wxString& name, long type = wxBITMAP_TYPE_ANY );
+    virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY, int index = -1 );
+    virtual bool LoadFile( const wxString& name, const wxString& mimetype, int index = -1 );

 
 #if wxUSE_STREAMS
     static bool CanRead( wxInputStream& stream );
 
 #if wxUSE_STREAMS
     static bool CanRead( wxInputStream& stream );

-    virtual bool LoadFile( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
-    virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype );
+    static int GetImageCount( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
+    virtual bool LoadFile( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY, int index = -1 );
+    virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype, int index = -1 );

 #endif
 
 #endif
 

-    virtual bool SaveFile( const wxString& name, int type );
-    virtual bool SaveFile( const wxString& name, const wxString& mimetype );
+    virtual bool SaveFile( const wxString& name ) const;
+    virtual bool SaveFile( const wxString& name, int type ) const;
+    virtual bool SaveFile( const wxString& name, const wxString& mimetype ) const;

 
 #if wxUSE_STREAMS
 
 #if wxUSE_STREAMS

-    virtual bool SaveFile( wxOutputStream& stream, int type );
-    virtual bool SaveFile( wxOutputStream& stream, const wxString& mimetype );
+    virtual bool SaveFile( wxOutputStream& stream, int type ) const;
+    virtual bool SaveFile( wxOutputStream& stream, const wxString& mimetype ) const;

 #endif
 
     bool Ok() const;
     int GetWidth() const;
     int GetHeight() const;
 
 #endif
 
     bool Ok() const;
     int GetWidth() const;
     int GetHeight() const;
 

-    char unsigned *GetData() const;
-    void SetData( char unsigned *data );
-    void SetData( char unsigned *data, int new_width, int new_height );
-    
+    // these functions provide fastest access to wxImage data but should be
+    // used carefully as no checks are done
+    unsigned char *GetData() const;
+    void SetData( unsigned char *data );
+    void SetData( unsigned char *data, int new_width, int new_height );
+
+    unsigned char *GetAlpha() const;    // may return NULL!
+    bool HasAlpha() const { return GetAlpha() != NULL; }
+    void SetAlpha(unsigned char *alpha = NULL);
+
+    // Mask functions

     void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
     unsigned char GetMaskRed() const;
     unsigned char GetMaskGreen() const;
     unsigned char GetMaskBlue() const;
     void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
     unsigned char GetMaskRed() const;
     unsigned char GetMaskGreen() const;
     unsigned char GetMaskBlue() const;

-    void SetMask( bool mask = TRUE );
+    void SetMask( bool mask = true );

     bool HasMask() const;
 
     bool HasMask() const;
 

-    bool HasPalette() const { return m_palette.Ok(); }
-    const wxPalette& GetPalette() const { return m_palette; }
-    void SetPalette(const wxPalette& palette) { m_palette = palette; }
-
-    unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 );
-    unsigned long ComputeHistogram( wxHashTable &h );
+#if wxUSE_PALETTE
+    // Palette functions
+    bool HasPalette() const;
+    const wxPalette& GetPalette() const;
+    void SetPalette(const wxPalette& palette);
+#endif // wxUSE_PALETTE
+
+    // Option functions (arbitrary name/value mapping)
+    void SetOption(const wxString& name, const wxString& value);
+    void SetOption(const wxString& name, int value);
+    wxString GetOption(const wxString& name) const;
+    int GetOptionInt(const wxString& name) const;
+    bool HasOption(const wxString& name) const;
+
+    unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 ) const;
+
+    // Computes the histogram of the image and fills a hash table, indexed
+    // with integer keys built as 0xRRGGBB, containing wxImageHistogramEntry
+    // objects. Each of them contains an 'index' (useful to build a palette
+    // with the image colours) and a 'value', which is the number of pixels
+    // in the image with that colour.
+    // Returned value: # of entries in the histogram
+    unsigned long ComputeHistogram( wxImageHistogram &h ) const;

 
     wxImage& operator = (const wxImage& image)
     {
 
     wxImage& operator = (const wxImage& image)
     {


@@ -191,9 +299,9 @@ public:
         return *this;
     }
 
         return *this;
     }
 

-    bool operator == (const wxImage& image)
+    bool operator == (const wxImage& image) const

         { return m_refData == image.m_refData; }
         { return m_refData == image.m_refData; }

-    bool operator != (const wxImage& image)
+    bool operator != (const wxImage& image) const

         { return m_refData != image.m_refData; }
 
     static wxList& GetHandlers() { return sm_handlers; }
         { return m_refData != image.m_refData; }
 
     static wxList& GetHandlers() { return sm_handlers; }


@@ -205,12 +313,13 @@ public:
     static wxImageHandler *FindHandler( long imageType );
     static wxImageHandler *FindHandlerMime( const wxString& mimetype );
 
     static wxImageHandler *FindHandler( long imageType );
     static wxImageHandler *FindHandlerMime( const wxString& mimetype );
 

+    static wxString GetImageExtWildcard();
+

     static void CleanUpHandlers();
     static void InitStandardHandlers();
 
 protected:
     static void CleanUpHandlers();
     static void InitStandardHandlers();
 
 protected:

-    static wxList sm_handlers;
-    wxPalette m_palette;
+    static wxList   sm_handlers;

 
 private:
     friend class WXDLLEXPORT wxImageHandler;
 
 private:
     friend class WXDLLEXPORT wxImageHandler;


@@ -221,6 +330,7 @@ private:
 
 extern void WXDLLEXPORT wxInitAllImageHandlers();
 
 
 extern void WXDLLEXPORT wxInitAllImageHandlers();
 

+extern WXDLLEXPORT_DATA(wxImage)    wxNullImage;

 
 //-----------------------------------------------------------------------------
 // wxImage handlers
 
 //-----------------------------------------------------------------------------
 // wxImage handlers


@@ -233,6 +343,10 @@ extern void WXDLLEXPORT wxInitAllImageHandlers();
 #include "wx/imagjpeg.h"
 #include "wx/imagtiff.h"
 #include "wx/imagpnm.h"
 #include "wx/imagjpeg.h"
 #include "wx/imagtiff.h"
 #include "wx/imagpnm.h"

+#include "wx/imagxpm.h"
+#include "wx/imagiff.h"
+
+#endif // wxUSE_IMAGE

 
 #endif
   // _WX_IMAGE_H_
 
 #endif
   // _WX_IMAGE_H_