Fix missing documentation for several GDI functions.

[wxWidgets.git] / include / wx / image.h

diff --git a/include/wx/image.h b/include/wx/image.h
index fd7695684176e7140d1493b2dcea06df61c42f18..575b96b362f7b6bf7b112547308a41755d995cdc 100644 (file)
--- a/include/wx/image.h
+++ b/include/wx/image.h
@@ -18,6 +18,7 @@
 #include "wx/string.h"
 #include "wx/gdicmn.h"
 #include "wx/hashmap.h"
 #include "wx/string.h"
 #include "wx/gdicmn.h"
 #include "wx/hashmap.h"

+#include "wx/arrstr.h"

 
 #if wxUSE_STREAMS
 #  include "wx/stream.h"
 
 #if wxUSE_STREAMS
 #  include "wx/stream.h"


@@ -27,17 +28,20 @@
 // which breaks the compilation below
 #undef index
 
 // 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(wxS("quality"))
+#define wxIMAGE_OPTION_FILENAME              wxString(wxS("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(wxS("Resolution"))
+#define wxIMAGE_OPTION_RESOLUTIONX           wxString(wxS("ResolutionX"))
+#define wxIMAGE_OPTION_RESOLUTIONY           wxString(wxS("ResolutionY"))

 
 

-#define wxIMAGE_OPTION_RESOLUTIONUNIT        wxString(_T("ResolutionUnit"))
+#define wxIMAGE_OPTION_RESOLUTIONUNIT        wxString(wxS("ResolutionUnit"))

 
 

-#define wxIMAGE_OPTION_MAX_WIDTH             wxString(_T("MaxWidth"))
-#define wxIMAGE_OPTION_MAX_HEIGHT            wxString(_T("MaxHeight"))
+#define wxIMAGE_OPTION_MAX_WIDTH             wxString(wxS("MaxWidth"))
+#define wxIMAGE_OPTION_MAX_HEIGHT            wxString(wxS("MaxHeight"))
+
+#define wxIMAGE_OPTION_ORIGINAL_WIDTH        wxString(wxS("OriginalWidth"))
+#define wxIMAGE_OPTION_ORIGINAL_HEIGHT       wxString(wxS("OriginalHeight"))

 
 // constants used with wxIMAGE_OPTION_RESOLUTIONUNIT
 //
 
 // constants used with wxIMAGE_OPTION_RESOLUTIONUNIT
 //


@@ -55,10 +59,19 @@ enum wxImageResolution
 };
 
 // Constants for wxImage::Scale() for determining the level of quality
 };
 
 // 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,
+    wxIMAGE_QUALITY_BOX_AVERAGE = 3,
+
+    // default quality is low (but fast)
+    wxIMAGE_QUALITY_NORMAL = wxIMAGE_QUALITY_NEAREST,
+
+    // highest (but best) quality
+    wxIMAGE_QUALITY_HIGH = 4

 };
 
 // alpha channel values: fully transparent, default threshold separating
 };
 
 // alpha channel values: fully transparent, default threshold separating


@@ -97,10 +110,17 @@ public:
         { }
 
 #if wxUSE_STREAMS
         { }
 
 #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 );
 
     bool CanRead( wxInputStream& stream ) { return CallDoCanRead(stream); }
     bool CanRead( const wxString& name );


@@ -108,10 +128,12 @@ public:
 
     void SetName(const wxString& name) { m_name = name; }
     void SetExtension(const wxString& ext) { m_extension = ext; }
 
     void SetName(const wxString& name) { m_name = name; }
     void SetExtension(const wxString& ext) { m_extension = ext; }

+    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; }
     const wxString& GetExtension() const { return m_extension; }
     void SetType(wxBitmapType type) { m_type = type; }
     void SetMimeType(const wxString& type) { m_mime = type; }
     const wxString& GetName() const { return m_name; }
     const wxString& GetExtension() const { return m_extension; }

+    const wxArrayString& GetAltExtensions() const { return m_altExtensions; }

     wxBitmapType GetType() const { return m_type; }
     const wxString& GetMimeType() const { return m_mime; }
 
     wxBitmapType GetType() const { return m_type; }
     const wxString& GetMimeType() const { return m_mime; }
 


@@ -123,6 +145,13 @@ public:
 
 protected:
 #if wxUSE_STREAMS
 
 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
     virtual bool DoCanRead( wxInputStream& stream ) = 0;
 
     // save the stream position, call DoCanRead() and restore the position


@@ -138,6 +167,7 @@ protected:
 
     wxString  m_name;
     wxString  m_extension;
 
     wxString  m_name;
     wxString  m_extension;

+    wxArrayString m_altExtensions;

     wxString  m_mime;
     wxBitmapType m_type;
 
     wxString  m_mime;
     wxBitmapType m_type;
 


@@ -218,29 +248,56 @@ public:
     };
 
     wxImage() {}
     };
 
     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, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 );
-    wxImage( const wxString& name, const wxString& mimetype, int index = -1 );
-    wxImage( const char* const* xpmData );
+    wxImage( int width, int height, bool clear = true )
+        { Create( width, height, clear ); }
+    wxImage( int width, int height, unsigned char* data, bool static_data = false )
+        { Create( width, height, data, static_data ); }
+    wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false )
+        { Create( width, height, data, alpha, static_data ); }
+
+    // ctor variants using wxSize:
+    wxImage( const wxSize& sz, bool clear = true )
+        { Create( sz, clear ); }
+    wxImage( const wxSize& sz, unsigned char* data, bool static_data = false )
+        { Create( sz, data, static_data ); }
+    wxImage( const wxSize& sz, unsigned char* data, unsigned char* alpha, bool static_data = false )
+        { Create( sz, data, alpha, static_data ); }
+
+    wxImage( const wxString& name, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 )
+        { LoadFile( name, type, index ); }
+    wxImage( const wxString& name, const wxString& mimetype, int index = -1 )
+        { LoadFile( name, mimetype, index ); }
+    wxImage( const char* const* xpmData )
+        { Create(xpmData); }

 
 #if wxUSE_STREAMS
 
 #if wxUSE_STREAMS

-    wxImage( wxInputStream& stream, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 );
-    wxImage( wxInputStream& stream, const wxString& mimetype, int index = -1 );
+    wxImage( wxInputStream& stream, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 )
+        { LoadFile( stream, type, index ); }
+    wxImage( wxInputStream& stream, const wxString& mimetype, int index = -1 )
+        { LoadFile( stream, mimetype, index ); }

 #endif // wxUSE_STREAMS
 
 #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* const* xpmData );
 #ifdef __BORLANDC__
     // needed for Borland 5.5
     wxImage( char** xpmData ) { Create(const_cast<const char* const*>(xpmData)); }
     bool Create( char** xpmData ) { return Create(const_cast<const char* const*>(xpmData)); }
 #endif
     bool Create( const char* const* xpmData );
 #ifdef __BORLANDC__
     // needed for Borland 5.5
     wxImage( char** xpmData ) { Create(const_cast<const char* const*>(xpmData)); }
     bool Create( char** xpmData ) { return Create(const_cast<const char* const*>(xpmData)); }
 #endif

+
+    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); }
+    bool Create( const wxSize& sz, unsigned char* data, bool static_data = false )
+        { return Create(sz.GetWidth(), sz.GetHeight(), data, static_data); }
+    bool Create( const wxSize& sz, unsigned char* data, unsigned char* alpha, bool static_data = false )
+        { return Create(sz.GetWidth(), sz.GetHeight(), data, alpha, static_data); }
+

     void Destroy();
     void Destroy();

-   
+

     // initialize the image data with zeroes
     void Clear(unsigned char value = 0);
 
     // initialize the image data with zeroes
     void Clear(unsigned char value = 0);
 


@@ -263,10 +320,13 @@ public:
     void Paste( const wxImage &image, int x, int y );
 
     // return the new image with size width*height
     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
 
     // box averager and bicubic filters for up/down sampling

+    wxImage ResampleNearest(int width, int height) const;

     wxImage ResampleBox(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 ResampleBicubic(int width, int height) const;
 
     // blur the image according to the specified pixel radius


@@ -277,7 +337,9 @@ public:
     wxImage ShrinkBy( int xFactor , int yFactor ) const ;
 
     // rescales the image in place
     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,
 
     // resizes the image in place
     wxImage& Resize( const wxSize& size, const wxPoint& pos,


@@ -286,9 +348,10 @@ public:
     // 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,
     // 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 = NULL) const;

 
     wxImage Rotate90( bool clockwise = true ) const;
 
     wxImage Rotate90( bool clockwise = true ) const;

+    wxImage Rotate180() const;

     wxImage Mirror( bool horizontally = true ) const;
 
     // replace one colour with another
     wxImage Mirror( bool horizontally = true ) const;
 
     // replace one colour with another


@@ -296,13 +359,17 @@ public:
                   unsigned char r2, unsigned char g2, unsigned char b2 );
 
     // Convert to greyscale image. Uses the luminance component (Y) of the image.
                   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 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 );
     // 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 );


@@ -322,9 +389,13 @@ public:
     bool SetMaskFromImage(const wxImage & mask,
                           unsigned char mr, unsigned char mg, unsigned char mb);
 
     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:
+    // converts image's alpha channel to mask (choosing mask colour
+    // automatically or using the specified colour for the mask), if it has
+    // any, does nothing otherwise:

     bool ConvertAlphaToMask(unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
     bool ConvertAlphaToMask(unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);

+    bool ConvertAlphaToMask(unsigned char mr, unsigned char mg, unsigned char mb,
+                            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
 
     // This method converts an image where the original alpha
     // information is only available as a shades of a colour


@@ -385,6 +456,7 @@ public:
     bool HasAlpha() const { return GetAlpha() != NULL; }
     void SetAlpha(unsigned char *alpha = NULL, bool static_data=false);
     void InitAlpha();
     bool HasAlpha() const { return GetAlpha() != NULL; }
     void SetAlpha(unsigned char *alpha = NULL, bool static_data=false);
     void InitAlpha();

+    void ClearAlpha();

 
     // return true if this pixel is masked or has alpha less than specified
     // threshold
 
     // return true if this pixel is masked or has alpha less than specified
     // threshold


@@ -493,15 +565,15 @@ public:
         }
     )
 
         }
     )
 

-    wxDEPRECATED(
-        static wxImageHandler *FindHandler(const wxString& ext, long type)
+    static wxDEPRECATED(
+        wxImageHandler *FindHandler(const wxString& ext, long type)

         {
             return FindHandler(ext, (wxBitmapType)type);
         }
     )
 
         {
             return FindHandler(ext, (wxBitmapType)type);
         }
     )
 

-    wxDEPRECATED(
-        static wxImageHandler *FindHandler(long imageType)
+    static wxDEPRECATED(
+        wxImageHandler *FindHandler(long imageType)

         {
             return FindHandler((wxBitmapType)imageType);
         }
         {
             return FindHandler((wxBitmapType)imageType);
         }


@@ -523,6 +595,24 @@ protected:
 private:
     friend class WXDLLIMPEXP_FWD_CORE wxImageHandler;
 
 private:
     friend class WXDLLIMPEXP_FWD_CORE wxImageHandler;
 

+    // Possible values for MakeEmptyClone() flags.
+    enum
+    {
+        // Create an image with the same orientation as this one. This is the
+        // default and only exists for symmetry with SwapOrientation.
+        Clone_SameOrientation = 0,
+
+        // Create an image with the same height as this image width and the
+        // same width as this image height.
+        Clone_SwapOrientation = 1
+    };
+
+    // Returns a new blank image with the same dimensions (or with width and
+    // height swapped if Clone_SwapOrientation flag is given), alpha, and mask
+    // as this image itself. This is used by several functions creating
+    // modified versions of this image.
+    wxImage MakeEmptyClone(int flags = Clone_SameOrientation) const;
+

 #if wxUSE_STREAMS
     // read the image from the specified stream updating image type if
     // successful
 #if wxUSE_STREAMS
     // read the image from the specified stream updating image type if
     // successful