X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b737ad10dec946cd7d5e38c43c666e8efe89f0ae..9b2a74693ea0ac096f5099caac4a5ead3268e07f:/include/wx/image.h diff --git a/include/wx/image.h b/include/wx/image.h index 61f54d16cf..aa801035f6 100644 --- a/include/wx/image.h +++ b/include/wx/image.h @@ -10,11 +10,7 @@ #ifndef _WX_IMAGE_H_ #define _WX_IMAGE_H_ -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -#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" @@ -46,6 +42,13 @@ enum 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 //----------------------------------------------------------------------------- @@ -150,6 +153,29 @@ public: class WXDLLEXPORT wxImage: public wxObject { public: + // 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 ); @@ -164,9 +190,6 @@ public: wxImage( wxInputStream& stream, const wxString& mimetype, int index = -1 ); #endif // wxUSE_STREAMS - wxImage( const wxImage& image ); - wxImage( const wxImage* image ); - 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 ); @@ -182,9 +205,9 @@ public: // 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 + // 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, + 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 @@ -200,7 +223,7 @@ public: wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); } // resizes the image in place - wxImage& Resize( const wxSize& size, const wxPoint& pos, + 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. @@ -215,6 +238,10 @@ public: void Replace( unsigned char r1, unsigned char g1, unsigned char b1, unsigned char r2, unsigned char g2, unsigned char b2 ); + // 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 ( will be replaced by white, // everything else by black) wxImage ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const; @@ -240,7 +267,7 @@ public: // converts image's alpha channel to mask, if it has any, does nothing // otherwise: - bool ConvertAlphaToMask(unsigned char threshold = 128); + 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 @@ -282,14 +309,19 @@ public: // 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 ); + 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); + 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 @@ -325,12 +357,9 @@ public: // 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; } @@ -351,9 +380,19 @@ public: 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;