// Author: Robert Roebling
// RCS-ID: $Id$
// Copyright: (c) Robert Roebling
-// Licence: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_IMAGE_H_
#define _WX_IMAGE_H_
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma interface "image.h"
#endif
#include "wx/object.h"
#include "wx/string.h"
#include "wx/gdicmn.h"
+#include "wx/hashmap.h"
+
+#if wxUSE_STREAMS
+# 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
+
+#define wxIMAGE_OPTION_FILENAME wxString(_T("FileName"))
//-----------------------------------------------------------------------------
// classes
//-----------------------------------------------------------------------------
class WXDLLEXPORT wxImageHandler;
-class WXDLLEXPORT wxPNGHandler;
-class WXDLLEXPORT wxBMPHandler;
class WXDLLEXPORT wxImage;
+class WXDLLEXPORT wxPalette;
//-----------------------------------------------------------------------------
// wxImageHandler
class WXDLLEXPORT wxImageHandler: public wxObject
{
- DECLARE_DYNAMIC_CLASS(wxImageHandler)
-
public:
- wxImageHandler() { m_name = ""; m_extension = ""; m_type = 0; }
-
- virtual bool LoadFile( wxImage *image, const wxString& name );
- virtual bool SaveFile( wxImage *image, const wxString& name );
-
- inline void SetName(const wxString& name) { m_name = name; }
- inline void SetExtension(const wxString& ext) { m_extension = ext; }
- inline void SetType(long type) { m_type = type; }
- inline wxString GetName() const { return m_name; }
- inline wxString GetExtension() const { return m_extension; }
- inline long GetType() const { return m_type; }
-
+ 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 int GetImageCount( wxInputStream& stream );
+
+ bool CanRead( wxInputStream& stream ) { return CallDoCanRead(stream); }
+ bool CanRead( const wxString& name );
+#endif // wxUSE_STREAMS
+
+ void SetName(const wxString& name) { m_name = name; }
+ void SetExtension(const wxString& ext) { m_extension = ext; }
+ void SetType(long type) { m_type = type; }
+ void SetMimeType(const wxString& type) { m_mime = type; }
+ wxString GetName() const { return m_name; }
+ wxString GetExtension() const { return m_extension; }
+ long GetType() const { return m_type; }
+ wxString GetMimeType() const { return m_mime; }
+
protected:
- wxString m_name;
- wxString m_extension;
- long m_type;
-
+#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)
};
//-----------------------------------------------------------------------------
-// wxPNGHandler
+// wxImageHistogram
//-----------------------------------------------------------------------------
-class WXDLLEXPORT wxPNGHandler: public wxImageHandler
+class WXDLLEXPORT wxImageHistogramEntry
{
- DECLARE_DYNAMIC_CLASS(wxPNGHandler)
-
public:
-
- inline wxPNGHandler()
- {
- m_name = "PNG file";
- m_extension = "png";
- m_type = wxBITMAP_TYPE_PNG;
- };
-
- virtual bool LoadFile( wxImage *image, const wxString& name );
- virtual bool SaveFile( wxImage *image, const wxString& name );
+ wxImageHistogramEntry() { index = value = 0; }
+ unsigned long index;
+ unsigned long value;
};
-//-----------------------------------------------------------------------------
-// wxBMPHandler
-//-----------------------------------------------------------------------------
+WX_DECLARE_EXPORTED_HASH_MAP(unsigned long, wxImageHistogramEntry,
+ wxIntegerHash, wxIntegerEqual,
+ wxImageHistogramBase);
-class WXDLLEXPORT wxBMPHandler: public wxImageHandler
+class WXDLLEXPORT wxImageHistogram : public wxImageHistogramBase
{
- DECLARE_DYNAMIC_CLASS(wxBMPHandler)
-
public:
+ wxImageHistogram() : wxImageHistogramBase(256) { }
- inline wxBMPHandler()
+ // get the key in the histogram for the given RGB values
+ static unsigned long MakeKey(unsigned char r,
+ unsigned char g,
+ unsigned char b)
{
- m_name = "BMP file";
- m_extension = "bmp";
- m_type = wxBITMAP_TYPE_BMP;
- };
+ return (r << 16) | (g << 8) | b;
+ }
- virtual bool LoadFile( wxImage *image, const wxString& name );
+ // 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
{
- DECLARE_DYNAMIC_CLASS(wxImage)
+public:
+ wxImage(){}
+ wxImage( int width, int height, bool clear = true );
+ wxImage( int width, int height, unsigned char* data, 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 );
- friend class WXDLLEXPORT wxImageHandler;
+#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
-public:
+ 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 );
+ 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;
+
+ // 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); }
+
+ // 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 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 ) const;
+ unsigned char GetGreen( int x, int y ) const;
+ unsigned char GetBlue( int x, int y ) const;
- wxImage();
- wxImage( int width, int height );
- wxImage( const wxString& name, long type = wxBITMAP_TYPE_PNG );
-
- wxImage( const wxImage& image );
- wxImage( const wxImage* image );
-
- void Create( int width, int height );
- void Destroy();
-
- virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_PNG );
- virtual bool SaveFile( const wxString& name, int type );
-
- bool Ok() const;
- int GetWidth() const;
- int GetHeight() const;
-
- char unsigned *GetData() const;
- void SetData( char unsigned *data );
-
- void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
- unsigned char GetMaskRed() const;
- unsigned char GetMaskGreen() const;
- unsigned char GetMaskBlue() const;
- void SetMask( bool mask = TRUE );
- bool HasMask() const;
-
- inline wxImage& operator = (const wxImage& image)
- { if (*this == image) return (*this); Ref(image); return *this; }
- inline bool operator == (const wxImage& image)
- { return m_refData == image.m_refData; }
- inline bool operator != (const wxImage& image)
- { return m_refData != image.m_refData; }
-
- static inline wxList& GetHandlers() { return sm_handlers; }
- static void AddHandler( wxImageHandler *handler );
- static void InsertHandler( wxImageHandler *handler );
- static bool RemoveHandler( const wxString& name );
- static wxImageHandler *FindHandler( const wxString& name );
- static wxImageHandler *FindHandler( const wxString& extension, long imageType );
- static wxImageHandler *FindHandler( long imageType );
-
- static void CleanUpHandlers();
+ 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 = 128);
+
+ // 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 );
+ virtual bool LoadFile( const wxString& name, const wxString& mimetype, int index = -1 );
+
+#if wxUSE_STREAMS
+ static bool CanRead( wxInputStream& stream );
+ 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 ) 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 ) const;
+ virtual bool SaveFile( wxOutputStream& stream, const wxString& mimetype ) const;
+#endif
+
+ bool Ok() const;
+ int GetWidth() const;
+ int GetHeight() const;
+
+ // 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 );
+
+ unsigned char *GetAlpha() const; // may return NULL!
+ bool HasAlpha() const { return GetAlpha() != NULL; }
+ void SetAlpha(unsigned char *alpha = NULL);
+
+ // Mask functions
+ void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
+ unsigned char GetMaskRed() const;
+ unsigned char GetMaskGreen() const;
+ unsigned char GetMaskBlue() const;
+ void SetMask( bool mask = true );
+ bool HasMask() const;
+
+#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;
+
+ wxImage& operator = (const wxImage& image)
+ {
+ if ( (*this) != image )
+ Ref(image);
+ return *this;
+ }
+
+ bool operator == (const wxImage& image) const
+ { return m_refData == image.m_refData; }
+ bool operator != (const wxImage& image) const
+ { return m_refData != image.m_refData; }
+
+ static wxList& GetHandlers() { return sm_handlers; }
+ static void AddHandler( wxImageHandler *handler );
+ static void InsertHandler( wxImageHandler *handler );
+ static bool RemoveHandler( const wxString& name );
+ static wxImageHandler *FindHandler( const wxString& name );
+ static wxImageHandler *FindHandler( const wxString& extension, long imageType );
+ static wxImageHandler *FindHandler( long imageType );
+ static wxImageHandler *FindHandlerMime( const wxString& mimetype );
+
+ static wxString GetImageExtWildcard();
+
+ static void CleanUpHandlers();
+ static void InitStandardHandlers();
protected:
+ static wxList sm_handlers;
- static wxList sm_handlers;
-
+private:
+ friend class WXDLLEXPORT wxImageHandler;
+
+ DECLARE_DYNAMIC_CLASS(wxImage)
};
+
+extern void WXDLLEXPORT wxInitAllImageHandlers();
+
+WXDLLEXPORT_DATA(extern wxImage) wxNullImage;
+
+//-----------------------------------------------------------------------------
+// wxImage handlers
+//-----------------------------------------------------------------------------
+
+#include "wx/imagbmp.h"
+#include "wx/imagpng.h"
+#include "wx/imaggif.h"
+#include "wx/imagpcx.h"
+#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