Not everything has to be virtual.

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

diff --git a/include/wx/image.h b/include/wx/image.h
index a165ad27949b1d21ad65820d365a5f04c8a9fd61..8718380516efeaf0f426c0d7729556ee59a928b2 100644 (file)
--- a/include/wx/image.h
+++ b/include/wx/image.h
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        image.h
+// Name:        wx/image.h

 // Purpose:     wxImage class
 // Author:      Robert Roebling
 // RCS-ID:      $Id$
 // Purpose:     wxImage class
 // Author:      Robert Roebling
 // RCS-ID:      $Id$


@@ -10,27 +10,53 @@
 #ifndef _WX_IMAGE_H_
 #define _WX_IMAGE_H_
 
 #ifndef _WX_IMAGE_H_
 #define _WX_IMAGE_H_
 

-#if defined(__GNUG__) && !defined(__APPLE__)
-#pragma interface "image.h"
-#endif
+#include "wx/defs.h"
+
+#if wxUSE_IMAGE

 
 

-#include "wx/setup.h"

 #include "wx/object.h"
 #include "wx/string.h"
 #include "wx/gdicmn.h"
 #include "wx/object.h"
 #include "wx/string.h"
 #include "wx/gdicmn.h"

-#if WXWIN_COMPATIBILITY_2_2
-#  include "wx/bitmap.h"
-#endif

 #include "wx/hashmap.h"
 
 #if wxUSE_STREAMS
 #  include "wx/stream.h"
 #endif
 
 #include "wx/hashmap.h"
 
 #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_QUALITY  wxString(_T("quality"))

 #define wxIMAGE_OPTION_FILENAME wxString(_T("FileName"))
 
 #define wxIMAGE_OPTION_FILENAME wxString(_T("FileName"))
 

+#define wxIMAGE_OPTION_RESOLUTION            wxString(_T("Resolution"))
+#define wxIMAGE_OPTION_RESOLUTIONX           wxString(_T("ResolutionX"))
+#define wxIMAGE_OPTION_RESOLUTIONY           wxString(_T("ResolutionY"))
+
+#define wxIMAGE_OPTION_RESOLUTIONUNIT        wxString(_T("ResolutionUnit"))
+
+// constants used with wxIMAGE_OPTION_RESOLUTIONUNIT
+enum
+{
+    wxIMAGE_RESOLUTION_INCHES = 1,
+    wxIMAGE_RESOLUTION_CM = 2
+};
+
+// Constants for wxImage::Scale() for determining the level of quality
+enum
+{
+    wxIMAGE_QUALITY_NORMAL = 0,
+    wxIMAGE_QUALITY_HIGH = 1
+};
+
+// alpha channel values: fully transparent, default threshold separating
+// transparent pixels from opaque for a few functions dealing with alpha and
+// fully opaque
+const unsigned char wxIMAGE_ALPHA_TRANSPARENT = 0;
+const unsigned char wxIMAGE_ALPHA_THRESHOLD = 0x80;
+const unsigned char wxIMAGE_ALPHA_OPAQUE = 0xff;
+

 //-----------------------------------------------------------------------------
 // classes
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 // classes
 //-----------------------------------------------------------------------------


@@ -39,6 +65,15 @@ class WXDLLEXPORT wxImageHandler;
 class WXDLLEXPORT wxImage;
 class WXDLLEXPORT wxPalette;
 
 class WXDLLEXPORT wxImage;
 class WXDLLEXPORT wxPalette;
 

+//-----------------------------------------------------------------------------
+// wxVariant support
+//-----------------------------------------------------------------------------
+
+#if wxUSE_VARIANT
+#include "wx/variant.h"
+DECLARE_VARIANT_OBJECT_EXPORTED(wxImage,WXDLLEXPORT)
+#endif
+

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


@@ -47,12 +82,12 @@ class WXDLLEXPORT wxImageHandler: public wxObject
 {
 public:
     wxImageHandler()
 {
 public:
     wxImageHandler()

-        : m_name(wxT("")), m_extension(wxT("")), m_mime(), m_type(0)
+        : 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=-1 );
-    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 );
 


@@ -93,14 +128,40 @@ private:
 class WXDLLEXPORT wxImageHistogramEntry
 {
 public:
 class WXDLLEXPORT wxImageHistogramEntry
 {
 public:

-    wxImageHistogramEntry() : index(0), value(0) {}
+    wxImageHistogramEntry() { index = value = 0; }

     unsigned long index;
     unsigned long value;
 };
 
 WX_DECLARE_EXPORTED_HASH_MAP(unsigned long, wxImageHistogramEntry,
                              wxIntegerHash, wxIntegerEqual,
     unsigned long index;
     unsigned long value;
 };
 
 WX_DECLARE_EXPORTED_HASH_MAP(unsigned long, wxImageHistogramEntry,
                              wxIntegerHash, wxIntegerEqual,

-                             wxImageHistogram);
+                             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
 
 //-----------------------------------------------------------------------------
 // wxImage


@@ -109,31 +170,47 @@ WX_DECLARE_EXPORTED_HASH_MAP(unsigned long, wxImageHistogramEntry,
 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 );
+    // red, green and blue are 8 bit unsigned integers in the range of 0..255
+    // We use the identifier RGBValue instead of RGB, since RGB is #defined
+    class RGBValue
+    {
+    public:
+      RGBValue(unsigned char r=0, unsigned char g=0, unsigned char b=0)
+        : red(r), green(g), blue(b) {}
+        unsigned char red;
+        unsigned char green;
+        unsigned char blue;
+    };
+
+    // hue, saturation and value are doubles in the range 0.0..1.0
+    class HSVValue
+    {
+    public:
+        HSVValue(double h=0.0, double s=0.0, double v=0.0)
+            : hue(h), saturation(s), value(v) {}
+        double hue;
+        double saturation;
+        double value;
+    };
+
+    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 );
     wxImage( const wxString& name, long type = wxBITMAP_TYPE_ANY, int index = -1 );
     wxImage( const wxString& name, const wxString& mimetype, int index = -1 );

+    wxImage( const char** xpmData );
+    wxImage( char** xpmData );

 
 #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
 
 
 #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 );
-
-#if WXWIN_COMPATIBILITY_2_2 && wxUSE_GUI
-    // conversion to/from wxBitmap (deprecated, use wxBitmap's methods instead):
-    wxDEPRECATED( wxImage(const wxBitmap &bitmap) );
-    wxDEPRECATED( wxBitmap ConvertToBitmap() const );
-#ifdef __WXGTK__
-    wxBitmap ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) const;
-#endif
-#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 );
+    bool Create( const char** xpmData );

     void Destroy();
 
     // creates an identical copy of the image (the = operator
     void Destroy();
 
     // creates an identical copy of the image (the = operator


@@ -141,39 +218,70 @@ public:
     wxImage Copy() const;
 
     // return the new image with size width*height
     wxImage Copy() const;
 
     // return the new image with size width*height

-    wxImage GetSubImage( const wxRect& ) const;
+    wxImage GetSubImage( const wxRect& rect) const;
+
+    // Paste the image or part of this image into an image of the given size at the pos
+    //  any newly exposed areas will be filled with the rgb colour
+    //  by default if r = g = b = -1 then fill with this image's mask colour or find and
+    //  set a suitable mask colour
+    wxImage Size( const wxSize& size, const wxPoint& pos,
+                  int r = -1, int g = -1, int b = -1 ) const;

 
     // 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 );
 
     // return the new image with size width*height
 
     // 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 );
 
     // return the new image with size width*height

-    wxImage Scale( int width, int height ) const;
+    wxImage Scale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) const;
+
+    // box averager and bicubic filters for up/down sampling
+    wxImage ResampleBox(int width, int height) const;
+    wxImage ResampleBicubic(int width, int height) const;
+
+    // blur the image according to the specified pixel radius
+    wxImage Blur(int radius);
+    wxImage BlurHorizontal(int radius);
+    wxImage BlurVertical(int radius);
+
+    wxImage ShrinkBy( int xFactor , int yFactor ) const ;

 
     // rescales the image in place
 
     // rescales the image in place

-    wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); }
+    wxImage& Rescale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) { return *this = Scale(width, height, quality); }
+
+    // resizes the image in place
+    wxImage& Resize( const wxSize& size, const wxPoint& pos,
+                     int r = -1, int g = -1, int b = -1 ) { return *this = Size(size, pos, r, g, b); }

 
     // 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,
 
     // 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)
+    // Convert to greyscale image. Uses the luminance component (Y) of the image.
+    // The luma value (YUV) is calculated using (R * lr) + (G * lg) + (B * lb), defaults to ITU-T BT.601
+    wxImage ConvertToGreyscale( double lr = 0.299, double lg = 0.587, double lb = 0.114 ) const;
+
+    // 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 );
     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 );

+    void SetRGB( const wxRect& rect, 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;
 
     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,
     // 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,


@@ -183,6 +291,22 @@ public:
     bool SetMaskFromImage(const wxImage & mask,
                           unsigned char mr, unsigned char mg, unsigned char mb);
 
     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 = wxIMAGE_ALPHA_THRESHOLD);
+
+    // 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 int GetImageCount( const wxString& name, long type = wxBITMAP_TYPE_ANY );
     virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY, int index = -1 );
     static bool CanRead( const wxString& name );
     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 );


@@ -208,16 +332,31 @@ public:
     int GetWidth() const;
     int GetHeight() 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, bool static_data=false );
+    void SetData( unsigned char *data, int new_width, int new_height, bool static_data=false );
+
+    unsigned char *GetAlpha() const;    // may return NULL!
+    bool HasAlpha() const { return GetAlpha() != NULL; }
+    void SetAlpha(unsigned char *alpha = NULL, bool static_data=false);
+    void InitAlpha();
+
+    // return true if this pixel is masked or has alpha less than specified
+    // threshold
+    bool IsTransparent(int x, int y,
+                       unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD) const;

 
     // Mask functions
     void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
 
     // Mask functions
     void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );

+    // Get the current mask colour or find a suitable colour
+    // returns true if using current mask colour
+    bool GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const;

     unsigned char GetMaskRed() const;
     unsigned char GetMaskGreen() const;
     unsigned char GetMaskBlue() const;
     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;
 
 #if wxUSE_PALETTE
     bool HasMask() const;
 
 #if wxUSE_PALETTE


@@ -238,18 +377,15 @@ public:
 
     // Computes the histogram of the image and fills a hash table, indexed
     // with integer keys built as 0xRRGGBB, containing wxImageHistogramEntry
 
     // 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 
+    // 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;
 
     // in the image with that colour.
     // Returned value: # of entries in the histogram
     unsigned long ComputeHistogram( wxImageHistogram &h ) const;
 

-    wxImage& operator = (const wxImage& image)
-    {
-        if ( (*this) != image )
-            Ref(image);
-        return *this;
-    }
+    // Rotates the hue of each pixel of the image. angle is a double in the range
+    // -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees
+    void RotateHue(double angle);

 
     bool operator == (const wxImage& image) const
         { return m_refData == image.m_refData; }
 
     bool operator == (const wxImage& image) const
         { return m_refData == image.m_refData; }


@@ -265,12 +401,27 @@ 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();
 
     static void CleanUpHandlers();
     static void InitStandardHandlers();
 

+    static HSVValue RGBtoHSV(const RGBValue& rgb);
+    static RGBValue HSVtoRGB(const HSVValue& hsv);
+
+

 protected:
     static wxList   sm_handlers;
 
 protected:
     static wxList   sm_handlers;
 

+    // return the index of the point with the given coordinates or -1 if the
+    // image is invalid of the coordinates are out of range
+    //
+    // note that index must be multiplied by 3 when using it with RGB array
+    long XYToIndex(int x, int y) const;
+
+    virtual wxObjectRefData* CreateRefData() const;
+    virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
+

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


@@ -280,7 +431,7 @@ private:
 
 extern void WXDLLEXPORT wxInitAllImageHandlers();
 
 
 extern void WXDLLEXPORT wxInitAllImageHandlers();
 

-WXDLLEXPORT_DATA(extern wxImage)    wxNullImage;
+extern WXDLLEXPORT_DATA(wxImage)    wxNullImage;

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


@@ -300,4 +451,3 @@ WXDLLEXPORT_DATA(extern wxImage)    wxNullImage;
 
 #endif
   // _WX_IMAGE_H_
 
 #endif
   // _WX_IMAGE_H_

-