/////////////////////////////////////////////////////////////////////////////
-// Name: image.h
+// Name: wx/image.h
// Purpose: wxImage class
// Author: Robert Roebling
// RCS-ID: $Id$
#ifndef _WX_IMAGE_H_
#define _WX_IMAGE_H_
-#ifdef __GNUG__
-#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/bitmap.h"
+#include "wx/hashmap.h"
#if wxUSE_STREAMS
# include "wx/stream.h"
#endif
+// 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
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=0 );
- 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
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;
wxString m_extension;
wxString m_mime;
long m_type;
-
+
private:
DECLARE_CLASS(wxImageHandler)
};
//-----------------------------------------------------------------------------
-// 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( const wxString& name, long type = wxBITMAP_TYPE_ANY );
- wxImage( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
- wxImage( const wxString& name, const wxString& mimetype );
- wxImage( wxInputStream& stream, const wxString& mimetype );
-
- wxImage( const wxImage& image );
- wxImage( const wxImage* image );
-
- // these functions get implemented in /src/(platform)/bitmap.cpp
- wxImage( const wxBitmap &bitmap );
- operator wxBitmap() const { return ConvertToBitmap(); }
- wxBitmap ConvertToBitmap() const;
-
- void Create( int width, int height );
+ // 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 );
+ wxImage( wxInputStream& stream, const wxString& mimetype, int index = -1 );
+#endif // wxUSE_STREAMS
+
+ 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
+ // just raises the ref count)
+ 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
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;
+
+ 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 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 );
- unsigned char GetRed( int x, int y );
- unsigned char GetGreen( int x, int y );
- unsigned char GetBlue( int x, int y );
+ 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 <startR,startG,startB>
+ bool FindFirstUnusedColour( unsigned char *r, unsigned char *g, unsigned char *b,
+ unsigned char startR = 1, unsigned char startG = 0,
+ unsigned char startB = 0 ) const;
+ // Set image's mask to the area of 'mask' that has <r,g,b> 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 );
- virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY );
- virtual bool LoadFile( const wxString& name, const wxString& mimetype );
+ 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 );
+ virtual bool LoadFile( const wxString& name, const wxString& mimetype, int index = -1 );
#if wxUSE_STREAMS
static bool CanRead( wxInputStream& stream );
- virtual bool LoadFile( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
- virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype );
+ static int GetImageCount( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
+ virtual bool LoadFile( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY, int index = -1 );
+ 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 );
+ // 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;
- unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 );
- unsigned long ComputeHistogram( wxHashTable &h );
-
- wxImage& operator = (const wxImage& image)
- {
- if ( (*this) != image )
- Ref(image);
- return *this;
- }
-
- bool operator == (const wxImage& image)
+#if wxUSE_PALETTE
+ // Palette functions
+ bool HasPalette() const;
+ const wxPalette& GetPalette() const;
+ void SetPalette(const wxPalette& palette);
+#endif // wxUSE_PALETTE
+
+ // Option functions (arbitrary name/value mapping)
+ void SetOption(const wxString& name, const wxString& value);
+ void SetOption(const wxString& name, int value);
+ wxString GetOption(const wxString& name) const;
+ int GetOptionInt(const wxString& name) const;
+ bool HasOption(const wxString& name) const;
+
+ 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);
+
+ 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; }
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;
+ 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;
extern void WXDLLEXPORT wxInitAllImageHandlers();
+extern WXDLLEXPORT_DATA(wxImage) wxNullImage;
//-----------------------------------------------------------------------------
// wxImage handlers
#include "wx/imagjpeg.h"
#include "wx/imagtiff.h"
#include "wx/imagpnm.h"
+#include "wx/imagxpm.h"
+#include "wx/imagiff.h"
+
+#endif // wxUSE_IMAGE
#endif
// _WX_IMAGE_H_
-
projects / wxWidgets.git / blobdiff