X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ed39ff57b30a70a2395e07887a70bc01e7a3b7ec..ef094fa075bc56bcbc33b12159c395ea28afda3b:/include/wx/image.h?ds=sidebyside diff --git a/include/wx/image.h b/include/wx/image.h index a165ad2794..12a0223cc7 100644 --- a/include/wx/image.h +++ b/include/wx/image.h @@ -29,6 +29,10 @@ #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")) //----------------------------------------------------------------------------- @@ -93,14 +97,40 @@ private: 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, - 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 @@ -110,7 +140,7 @@ class WXDLLEXPORT wxImage: public wxObject { public: wxImage(); - wxImage( int width, int height ); + wxImage( int width, int height, bool clear = true ); wxImage( int width, int height, unsigned char* data, 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 ); @@ -132,8 +162,8 @@ public: #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 ); void Destroy(); // creates an identical copy of the image (the = operator @@ -150,6 +180,8 @@ public: // 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); } @@ -174,6 +206,9 @@ public: 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); + // find first colour that is not used in the image and has higher // RGB values than bool FindFirstUnusedColour( unsigned char *r, unsigned char *g, unsigned char *b, @@ -208,9 +243,15 @@ public: 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 ); @@ -238,8 +279,8 @@ public: // 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;