#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/bitmap.h"
+#include "wx/hashmap.h"
#if wxUSE_STREAMS
# include "wx/stream.h"
#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 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=-1 );
- 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;
};
//-----------------------------------------------------------------------------
-// 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( int width, int height, unsigned char* data, bool static_data = FALSE );
+ 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 wxImage& image );
wxImage( const wxImage* image );
-#if wxUSE_GUI
- // convertion to/from wxBitmap (deprecated, use wxBitmap's methods instead):
- wxImage( const wxBitmap &bitmap );
- wxBitmap ConvertToBitmap() const;
-#ifdef __WXGTK__
- wxBitmap ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) const;
-#endif
-#endif
-
- void Create( int width, int height );
- void Create( int width, int height, unsigned char* data, bool static_data = FALSE );
+ 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 Destroy();
// creates an identical copy of the image (the = operator
// 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;
+ bool interpolating = true, wxPoint * offset_after_rotation = (wxPoint*) NULL) const;
- wxImage Rotate90( bool clockwise = TRUE ) const;
- wxImage Mirror( bool horizontally = TRUE ) 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)
+ // 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
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 );
+ 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( 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 );
- void SetData( char unsigned *data, int new_width, int new_height );
+ // 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 );
+ void SetMask( bool mask = true );
bool HasMask() const;
#if wxUSE_PALETTE
int GetOptionInt(const wxString& name) const;
bool HasOption(const wxString& name) const;
- unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 );
- unsigned long ComputeHistogram( wxHashTable &h );
+ 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)
{
return *this;
}
- bool operator == (const wxImage& image)
+ 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();
extern void WXDLLEXPORT wxInitAllImageHandlers();
-WXDLLEXPORT_DATA(extern wxImage) wxNullImage;
+extern WXDLLEXPORT_DATA(wxImage) wxNullImage;
//-----------------------------------------------------------------------------
// wxImage handlers
projects / wxWidgets.git / blobdiff