#include "wx/string.h"
#include "wx/gdicmn.h"
#include "wx/hashmap.h"
+#include "wx/arrstr.h"
#if wxUSE_STREAMS
# include "wx/stream.h"
// which breaks the compilation below
#undef index
-#define wxIMAGE_OPTION_QUALITY wxString(_T("quality"))
-#define wxIMAGE_OPTION_FILENAME wxString(_T("FileName"))
+#define wxIMAGE_OPTION_QUALITY wxString(wxT("quality"))
+#define wxIMAGE_OPTION_FILENAME wxString(wxT("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_RESOLUTION wxString(wxT("Resolution"))
+#define wxIMAGE_OPTION_RESOLUTIONX wxString(wxT("ResolutionX"))
+#define wxIMAGE_OPTION_RESOLUTIONY wxString(wxT("ResolutionY"))
-#define wxIMAGE_OPTION_RESOLUTIONUNIT wxString(_T("ResolutionUnit"))
+#define wxIMAGE_OPTION_RESOLUTIONUNIT wxString(wxT("ResolutionUnit"))
-#define wxIMAGE_OPTION_MAX_WIDTH wxString(_T("MaxWidth"))
-#define wxIMAGE_OPTION_MAX_HEIGHT wxString(_T("MaxHeight"))
+#define wxIMAGE_OPTION_MAX_WIDTH wxString(wxT("MaxWidth"))
+#define wxIMAGE_OPTION_MAX_HEIGHT wxString(wxT("MaxHeight"))
// constants used with wxIMAGE_OPTION_RESOLUTIONUNIT
//
};
// Constants for wxImage::Scale() for determining the level of quality
-enum
+enum wxImageResizeQuality
{
- wxIMAGE_QUALITY_NORMAL = 0,
- wxIMAGE_QUALITY_HIGH = 1
+ // different image resizing algorithms used by Scale() and Rescale()
+ wxIMAGE_QUALITY_NEAREST = 0,
+ wxIMAGE_QUALITY_BILINEAR = 1,
+ wxIMAGE_QUALITY_BICUBIC = 2,
+
+ // default quality is low (but fast)
+ wxIMAGE_QUALITY_NORMAL = wxIMAGE_QUALITY_NEAREST,
+
+ // highest (but best) quality
+ wxIMAGE_QUALITY_HIGH = wxIMAGE_QUALITY_BICUBIC
};
// alpha channel values: fully transparent, default threshold separating
{ }
#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 );
+ // NOTE: LoadFile and SaveFile are not pure virtuals to allow derived classes
+ // to implement only one of the two
+ virtual bool LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream),
+ bool WXUNUSED(verbose)=true, int WXUNUSED(index)=-1 )
+ { return false; }
+ virtual bool SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream),
+ bool WXUNUSED(verbose)=true )
+ { return false; }
+
+ int GetImageCount( wxInputStream& stream );
+ // save the stream position, call DoGetImageCount() and restore the position
bool CanRead( wxInputStream& stream ) { return CallDoCanRead(stream); }
bool CanRead( const wxString& name );
void SetName(const wxString& name) { m_name = name; }
void SetExtension(const wxString& ext) { m_extension = ext; }
- void SetAlExtensions(const wxArrayString& exts) { m_altExtensions = exts; }
+ void SetAltExtensions(const wxArrayString& exts) { m_altExtensions = exts; }
void SetType(wxBitmapType type) { m_type = type; }
void SetMimeType(const wxString& type) { m_mime = type; }
const wxString& GetName() const { return m_name; }
protected:
#if wxUSE_STREAMS
+ // NOTE: this function is allowed to change the current stream position
+ // since GetImageCount() will take care of restoring it later
+ virtual int DoGetImageCount( wxInputStream& WXUNUSED(stream) )
+ { return 1; } // default return value is 1 image
+
+ // NOTE: this function is allowed to change the current stream position
+ // since CallDoCanRead() will take care of restoring it later
virtual bool DoCanRead( wxInputStream& stream ) = 0;
// save the stream position, call DoCanRead() and restore the position
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 );
-
+
// Create() variants using wxSize:
bool Create( const wxSize& sz, bool clear = true )
{ return Create(sz.GetWidth(), sz.GetHeight(), clear); }
{ return Create(sz.GetWidth(), sz.GetHeight(), data, alpha, static_data); }
void Destroy();
-
+
// initialize the image data with zeroes
void Clear(unsigned char value = 0);
void Paste( const wxImage &image, int x, int y );
// return the new image with size width*height
- wxImage Scale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) const;
+ wxImage Scale( int width, int height,
+ wxImageResizeQuality quality = wxIMAGE_QUALITY_NORMAL ) const;
// box averager and bicubic filters for up/down sampling
+ wxImage ResampleNearest(int width, int height) const;
wxImage ResampleBox(int width, int height) const;
+ wxImage ResampleBilinear(int width, int height) const;
wxImage ResampleBicubic(int width, int height) const;
// blur the image according to the specified pixel radius
wxImage ShrinkBy( int xFactor , int yFactor ) const ;
// rescales the image in place
- wxImage& Rescale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) { return *this = Scale(width, height, quality); }
+ wxImage& Rescale( int width, int height,
+ wxImageResizeQuality quality = wxIMAGE_QUALITY_NORMAL )
+ { return *this = Scale(width, height, quality); }
// resizes the image in place
wxImage& Resize( const wxSize& size, const wxPoint& pos,
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;
+ // The luma value (YUV) is calculated using (R * weight_r) + (G * weight_g) + (B * weight_b), defaults to ITU-T BT.601
+ wxImage ConvertToGreyscale(double weight_r, double weight_g, double weight_b) const;
+ wxImage ConvertToGreyscale(void) 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;
+ // Convert to disabled (dimmed) image.
+ wxImage ConvertToDisabled(unsigned char brightness = 255) const;
+
// these routines are slow but safe
void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
void SetRGB( const wxRect& rect, unsigned char r, unsigned char g, unsigned char b );
projects / wxWidgets.git / blobdiff