X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4b6b4dfcf48af89d910df5a21786fbcd02db8c97..da9e956384a0619a0ecaa0bd1e4ba26b133b60a9:/include/wx/image.h?ds=sidebyside diff --git a/include/wx/image.h b/include/wx/image.h index 05cee7069d..e685022009 100644 --- a/include/wx/image.h +++ b/include/wx/image.h @@ -10,15 +10,11 @@ #ifndef _WX_IMAGE_H_ #define _WX_IMAGE_H_ -#ifdef __GNUG__ -#pragma interface "image.h" -#endif - -#include "wx/setup.h" +#include "wx/defs.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" @@ -26,12 +22,40 @@ #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_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 +}; + +// 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 //----------------------------------------------------------------------------- class WXDLLEXPORT wxImageHandler; class WXDLLEXPORT wxImage; +class WXDLLEXPORT wxPalette; //----------------------------------------------------------------------------- // wxImageHandler @@ -40,15 +64,17 @@ class WXDLLEXPORT wxImage; 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 - 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 ); - bool CanRead( wxInputStream& stream ) { return DoCanRead(stream); } + bool CanRead( wxInputStream& stream ) { return CallDoCanRead(stream); } bool CanRead( const wxString& name ); #endif // wxUSE_STREAMS @@ -64,6 +90,9 @@ public: 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; @@ -76,24 +105,85 @@ private: }; //----------------------------------------------------------------------------- -// wxImage +// wxImageHistogram //----------------------------------------------------------------------------- -class WXDLLEXPORT wxHNode +class WXDLLEXPORT wxImageHistogramEntry { public: + wxImageHistogramEntry() { index = value = 0; } 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: - 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 char** xpmData ); + wxImage( char** xpmData ); #if wxUSE_STREAMS wxImage( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY, int index = -1 ); @@ -103,17 +193,10 @@ public: wxImage( const wxImage& image ); wxImage( const wxImage* image ); -#if wxUSE_GUI - // convertion to/from wxBitmap (deprecated, use wxBitmap's methods instead): - wxImage( const wxBitmap &bitmap ); - 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 @@ -121,7 +204,14 @@ public: 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 @@ -130,39 +220,66 @@ 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); } + // 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, - 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 ); - // convert to monochrome image ( will be replaced by white, everything else by black) + // convert to monochrome image ( 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 ); + 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; + 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 bool FindFirstUnusedColour( unsigned char *r, unsigned char *g, unsigned char *b, unsigned char startR = 1, unsigned char startG = 0, - unsigned char startB = 0 ); + unsigned char startB = 0 ) const; // Set image's mask to the area of 'mask' that has 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 = 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 ); @@ -175,28 +292,44 @@ public: virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype, int index = -1 ); #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 - 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; - 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 ); + // 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; - void SetMask( bool mask = TRUE ); + void SetMask( bool mask = true ); bool HasMask() const; #if wxUSE_PALETTE @@ -213,8 +346,19 @@ public: int GetOptionInt(const wxString& name) const; bool HasOption(const wxString& name) const; - unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 ); - unsigned long ComputeHistogram( wxHashTable &h ); + 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; + + // 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); wxImage& operator = (const wxImage& image) { @@ -223,9 +367,9 @@ public: return *this; } - bool operator == (const wxImage& image) + bool operator == (const wxImage& image) const { 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; } @@ -237,12 +381,24 @@ public: static wxImageHandler *FindHandler( long imageType ); static wxImageHandler *FindHandlerMime( const wxString& mimetype ); + static wxString GetImageExtWildcard(); + static void CleanUpHandlers(); static void InitStandardHandlers(); + static HSVValue RGBtoHSV(const RGBValue& rgb); + static RGBValue HSVtoRGB(const HSVValue& hsv); + + 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; + private: friend class WXDLLEXPORT wxImageHandler; @@ -252,7 +408,7 @@ private: extern void WXDLLEXPORT wxInitAllImageHandlers(); -WXDLLEXPORT_DATA(extern wxImage) wxNullImage; +extern WXDLLEXPORT_DATA(wxImage) wxNullImage; //----------------------------------------------------------------------------- // wxImage handlers