/////////////////////////////////////////////////////////////////////////////
-// Name: image.h
+// Name: wx/image.h
// Purpose: wxImage class
// Author: Robert Roebling
// RCS-ID: $Id$
#ifndef _WX_IMAGE_H_
#define _WX_IMAGE_H_
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma interface "image.h"
-#endif
-
#include "wx/defs.h"
+
+#if wxUSE_IMAGE
+
#include "wx/object.h"
#include "wx/string.h"
#include "wx/gdicmn.h"
# 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
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 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 );
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 );
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 (<r,g,b> will be replaced by white,
// everything else by black)
wxImage ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const;
// 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
// 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
// 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; }
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;
+
+ virtual wxObjectRefData* CreateRefData() const;
+ virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
+
private:
friend class WXDLLEXPORT wxImageHandler;
#endif
// _WX_IMAGE_H_
-
projects / wxWidgets.git / blobdiff