828f093601
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32213 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
368 lines
13 KiB
C++
368 lines
13 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: image.h
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// Purpose: wxImage class
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// Author: Robert Roebling
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// RCS-ID: $Id$
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// Copyright: (c) Robert Roebling
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_IMAGE_H_
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#define _WX_IMAGE_H_
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#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
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#pragma interface "image.h"
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#endif
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#include "wx/setup.h"
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#include "wx/object.h"
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#include "wx/string.h"
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#include "wx/gdicmn.h"
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#include "wx/hashmap.h"
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#if wxUSE_STREAMS
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# include "wx/stream.h"
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#endif
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#if wxUSE_IMAGE
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// on some systems (Unixware 7.x) index is defined as a macro in the headers
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// which breaks the compilation below
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#undef index
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#define wxIMAGE_OPTION_FILENAME wxString(_T("FileName"))
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#define wxIMAGE_OPTION_RESOLUTION wxString(_T("Resolution"))
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#define wxIMAGE_OPTION_RESOLUTIONX wxString(_T("ResolutionX"))
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#define wxIMAGE_OPTION_RESOLUTIONY wxString(_T("ResolutionY"))
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#define wxIMAGE_OPTION_RESOLUTIONUNIT wxString(_T("ResolutionUnit"))
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// constants used with wxIMAGE_OPTION_RESOLUTIONUNIT
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enum
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{
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wxIMAGE_RESOLUTION_INCHES = 1,
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wxIMAGE_RESOLUTION_CM = 2
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};
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//-----------------------------------------------------------------------------
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// classes
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//-----------------------------------------------------------------------------
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class WXDLLEXPORT wxImageHandler;
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class WXDLLEXPORT wxImage;
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class WXDLLEXPORT wxPalette;
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//-----------------------------------------------------------------------------
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// wxImageHandler
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//-----------------------------------------------------------------------------
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class WXDLLEXPORT wxImageHandler: public wxObject
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{
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public:
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wxImageHandler()
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: m_name(wxEmptyString), m_extension(wxEmptyString), m_mime(), m_type(0)
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{ }
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#if wxUSE_STREAMS
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virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=true, int index=-1 );
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virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=true );
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virtual int GetImageCount( wxInputStream& stream );
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bool CanRead( wxInputStream& stream ) { return CallDoCanRead(stream); }
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bool CanRead( const wxString& name );
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#endif // wxUSE_STREAMS
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void SetName(const wxString& name) { m_name = name; }
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void SetExtension(const wxString& ext) { m_extension = ext; }
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void SetType(long type) { m_type = type; }
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void SetMimeType(const wxString& type) { m_mime = type; }
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wxString GetName() const { return m_name; }
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wxString GetExtension() const { return m_extension; }
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long GetType() const { return m_type; }
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wxString GetMimeType() const { return m_mime; }
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protected:
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#if wxUSE_STREAMS
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virtual bool DoCanRead( wxInputStream& stream ) = 0;
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// save the stream position, call DoCanRead() and restore the position
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bool CallDoCanRead(wxInputStream& stream);
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#endif // wxUSE_STREAMS
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wxString m_name;
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wxString m_extension;
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wxString m_mime;
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long m_type;
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private:
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DECLARE_CLASS(wxImageHandler)
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};
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//-----------------------------------------------------------------------------
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// wxImageHistogram
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//-----------------------------------------------------------------------------
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class WXDLLEXPORT wxImageHistogramEntry
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{
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public:
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wxImageHistogramEntry() { index = value = 0; }
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unsigned long index;
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unsigned long value;
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};
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WX_DECLARE_EXPORTED_HASH_MAP(unsigned long, wxImageHistogramEntry,
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wxIntegerHash, wxIntegerEqual,
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wxImageHistogramBase);
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class WXDLLEXPORT wxImageHistogram : public wxImageHistogramBase
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{
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public:
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wxImageHistogram() : wxImageHistogramBase(256) { }
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// get the key in the histogram for the given RGB values
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static unsigned long MakeKey(unsigned char r,
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unsigned char g,
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unsigned char b)
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{
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return (r << 16) | (g << 8) | b;
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}
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// find first colour that is not used in the image and has higher
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// RGB values than RGB(startR, startG, startB)
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//
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// returns true and puts this colour in r, g, b (each of which may be NULL)
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// on success or returns false if there are no more free colours
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bool FindFirstUnusedColour(unsigned char *r,
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unsigned char *g,
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unsigned char *b,
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unsigned char startR = 1,
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unsigned char startG = 0,
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unsigned char startB = 0 ) const;
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};
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//-----------------------------------------------------------------------------
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// wxImage
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//-----------------------------------------------------------------------------
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class WXDLLEXPORT wxImage: public wxObject
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{
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public:
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wxImage(){}
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wxImage( int width, int height, bool clear = true );
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wxImage( int width, int height, unsigned char* data, bool static_data = false );
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wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false );
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wxImage( const wxString& name, long type = wxBITMAP_TYPE_ANY, int index = -1 );
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wxImage( const wxString& name, const wxString& mimetype, int index = -1 );
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#if wxUSE_STREAMS
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wxImage( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY, int index = -1 );
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wxImage( wxInputStream& stream, const wxString& mimetype, int index = -1 );
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#endif // wxUSE_STREAMS
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wxImage( const wxImage& image );
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wxImage( const wxImage* image );
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bool Create( int width, int height, bool clear = true );
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bool Create( int width, int height, unsigned char* data, bool static_data = false );
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bool Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false );
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void Destroy();
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// creates an identical copy of the image (the = operator
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// just raises the ref count)
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wxImage Copy() const;
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// return the new image with size width*height
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wxImage GetSubImage( const wxRect& ) const;
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// pastes image into this instance and takes care of
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// the mask colour and out of bounds problems
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void Paste( const wxImage &image, int x, int y );
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// return the new image with size width*height
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wxImage Scale( int width, int height ) const;
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wxImage ShrinkBy( int xFactor , int yFactor ) const ;
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// rescales the image in place
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wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); }
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// Rotates the image about the given point, 'angle' radians.
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// Returns the rotated image, leaving this image intact.
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wxImage Rotate(double angle, const wxPoint & centre_of_rotation,
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bool interpolating = true, wxPoint * offset_after_rotation = (wxPoint*) NULL) const;
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wxImage Rotate90( bool clockwise = true ) const;
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wxImage Mirror( bool horizontally = true ) const;
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// replace one colour with another
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void Replace( unsigned char r1, unsigned char g1, unsigned char b1,
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unsigned char r2, unsigned char g2, unsigned char b2 );
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// convert to monochrome image (<r,g,b> will be replaced by white,
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// everything else by black)
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wxImage ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const;
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// these routines are slow but safe
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void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
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unsigned char GetRed( int x, int y ) const;
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unsigned char GetGreen( int x, int y ) const;
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unsigned char GetBlue( int x, int y ) const;
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void SetAlpha(int x, int y, unsigned char alpha);
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unsigned char GetAlpha(int x, int y) const;
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// find first colour that is not used in the image and has higher
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// RGB values than <startR,startG,startB>
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bool FindFirstUnusedColour( unsigned char *r, unsigned char *g, unsigned char *b,
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unsigned char startR = 1, unsigned char startG = 0,
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unsigned char startB = 0 ) const;
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// Set image's mask to the area of 'mask' that has <r,g,b> colour
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bool SetMaskFromImage(const wxImage & mask,
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unsigned char mr, unsigned char mg, unsigned char mb);
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// converts image's alpha channel to mask, if it has any, does nothing
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// otherwise:
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bool ConvertAlphaToMask(unsigned char threshold = 128);
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// This method converts an image where the original alpha
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// information is only available as a shades of a colour
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// (actually shades of grey) typically when you draw anti-
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// aliased text into a bitmap. The DC drawinf routines
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// draw grey values on the black background although they
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// actually mean to draw white with differnt alpha values.
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// This method reverses it, assuming a black (!) background
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// and white text (actually only the red channel is read).
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// The method will then fill up the whole image with the
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// colour given.
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bool ConvertColourToAlpha( unsigned char r, unsigned char g, unsigned char b );
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static bool CanRead( const wxString& name );
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static int GetImageCount( const wxString& name, long type = wxBITMAP_TYPE_ANY );
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virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY, int index = -1 );
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virtual bool LoadFile( const wxString& name, const wxString& mimetype, int index = -1 );
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#if wxUSE_STREAMS
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static bool CanRead( wxInputStream& stream );
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static int GetImageCount( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
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virtual bool LoadFile( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY, int index = -1 );
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virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype, int index = -1 );
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#endif
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virtual bool SaveFile( const wxString& name ) const;
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virtual bool SaveFile( const wxString& name, int type ) const;
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virtual bool SaveFile( const wxString& name, const wxString& mimetype ) const;
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#if wxUSE_STREAMS
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virtual bool SaveFile( wxOutputStream& stream, int type ) const;
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virtual bool SaveFile( wxOutputStream& stream, const wxString& mimetype ) const;
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#endif
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bool Ok() const;
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int GetWidth() const;
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int GetHeight() const;
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// these functions provide fastest access to wxImage data but should be
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// used carefully as no checks are done
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unsigned char *GetData() const;
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void SetData( unsigned char *data );
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void SetData( unsigned char *data, int new_width, int new_height );
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unsigned char *GetAlpha() const; // may return NULL!
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bool HasAlpha() const { return GetAlpha() != NULL; }
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void SetAlpha(unsigned char *alpha = NULL);
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void InitAlpha();
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// Mask functions
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void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
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unsigned char GetMaskRed() const;
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unsigned char GetMaskGreen() const;
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unsigned char GetMaskBlue() const;
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void SetMask( bool mask = true );
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bool HasMask() const;
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#if wxUSE_PALETTE
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// Palette functions
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bool HasPalette() const;
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const wxPalette& GetPalette() const;
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void SetPalette(const wxPalette& palette);
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#endif // wxUSE_PALETTE
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// Option functions (arbitrary name/value mapping)
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void SetOption(const wxString& name, const wxString& value);
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void SetOption(const wxString& name, int value);
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wxString GetOption(const wxString& name) const;
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int GetOptionInt(const wxString& name) const;
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bool HasOption(const wxString& name) const;
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unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 ) const;
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// Computes the histogram of the image and fills a hash table, indexed
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// with integer keys built as 0xRRGGBB, containing wxImageHistogramEntry
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// objects. Each of them contains an 'index' (useful to build a palette
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// with the image colours) and a 'value', which is the number of pixels
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// in the image with that colour.
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// Returned value: # of entries in the histogram
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unsigned long ComputeHistogram( wxImageHistogram &h ) const;
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wxImage& operator = (const wxImage& image)
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{
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if ( (*this) != image )
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Ref(image);
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return *this;
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}
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bool operator == (const wxImage& image) const
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{ return m_refData == image.m_refData; }
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bool operator != (const wxImage& image) const
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{ return m_refData != image.m_refData; }
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static wxList& GetHandlers() { return sm_handlers; }
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static void AddHandler( wxImageHandler *handler );
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static void InsertHandler( wxImageHandler *handler );
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static bool RemoveHandler( const wxString& name );
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static wxImageHandler *FindHandler( const wxString& name );
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static wxImageHandler *FindHandler( const wxString& extension, long imageType );
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static wxImageHandler *FindHandler( long imageType );
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static wxImageHandler *FindHandlerMime( const wxString& mimetype );
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static wxString GetImageExtWildcard();
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static void CleanUpHandlers();
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static void InitStandardHandlers();
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protected:
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static wxList sm_handlers;
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private:
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friend class WXDLLEXPORT wxImageHandler;
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DECLARE_DYNAMIC_CLASS(wxImage)
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};
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extern void WXDLLEXPORT wxInitAllImageHandlers();
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extern WXDLLEXPORT_DATA(wxImage) wxNullImage;
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//-----------------------------------------------------------------------------
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// wxImage handlers
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//-----------------------------------------------------------------------------
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#include "wx/imagbmp.h"
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#include "wx/imagpng.h"
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#include "wx/imaggif.h"
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#include "wx/imagpcx.h"
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#include "wx/imagjpeg.h"
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#include "wx/imagtiff.h"
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#include "wx/imagpnm.h"
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#include "wx/imagxpm.h"
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#include "wx/imagiff.h"
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#endif // wxUSE_IMAGE
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#endif
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// _WX_IMAGE_H_
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