\section{\class{wxImage}}\label{wximage}
This class encapsulates a platform-independent image. An image can be created
-from data, or using the constructor taking a wxBitmap object. An image
+from data, or using \helpref{wxBitmap::ConvertToImage}{wxbitmapconverttoimage}. An image
can be loaded from a file in a variety of formats, and is extensible to new formats
via image format handlers. Functions are available to set and get image bits, so
it can be used for basic image manipulation.
-A wxImage cannot (currently) be drawn directly to a wxDC. Instead, a platform-specific
-wxBitmap object must be created from it, and that bitmap drawn on the wxDC, using
-wxDC::DrawBitmap.
+A wxImage cannot (currently) be drawn directly to a \helpref{wxDC}{wxdc}. Instead,
+a platform-specific \helpref{wxBitmap}{wxbitmap} object must be created from it using
+the \helpref{wxBitmap::wxBitmap(wxImage,int depth)}{wxbitmapconstr} constructor.
+This bitmap can then
+be drawn in a device context, using \helpref{wxDC::DrawBitmap}{wxdcdrawbitmap}.
+
+One colour value of the image may be used as a mask colour which will lead to the automatic
+creation of a \helpref{wxMask}{wxmask} object associated to the bitmap object.
+
+\wxheading{Available image handlers}
+
+The following image handlers are available. {\bf wxBMPHandler} is always
+installed by default. To use other image formats, install the appropriate
+handler with \helpref{wxImage::AddHandler}{wximageaddhandler} or
+\helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}.
+
+\twocolwidtha{5cm}%
+\begin{twocollist}
+\twocolitem{\indexit{wxBMPHandler}}{For loading and saving, always installed.}
+\twocolitem{\indexit{wxPNGHandler}}{For loading and saving.}
+\twocolitem{\indexit{wxJPEGHandler}}{For loading and saving.}
+\twocolitem{\indexit{wxGIFHandler}}{Only for loading, due to legal issues.}
+\twocolitem{\indexit{wxPCXHandler}}{For loading and saving (see below).}
+\twocolitem{\indexit{wxPNMHandler}}{For loading and saving (see below).}
+\twocolitem{\indexit{wxTIFFHandler}}{For loading and saving.}
+\twocolitem{\indexit{wxIFFHandler}}{For loading only.}
+\twocolitem{\indexit{wxXPMHandler}}{For loading and saving.}
+\twocolitem{\indexit{wxICOHandler}}{For loading and saving.}
+\twocolitem{\indexit{wxCURHandler}}{For loading and saving.}
+\twocolitem{\indexit{wxANIHandler}}{For loading only.}
+\end{twocollist}
+
+When saving in PCX format, {\bf wxPCXHandler} will count the number of
+different colours in the image; if there are 256 or less colours, it will
+save as 8 bit, else it will save as 24 bit.
+
+Loading PNMs only works for ASCII or raw RGB images. When saving in
+PNM format, {\bf wxPNMHandler} will always save as raw RGB.
\wxheading{Derived from}
\wxheading{See also}
-\helpref{wxBitmap}{wxbitmap}
+\helpref{wxBitmap}{wxbitmap},
\helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}
\latexignore{\rtfignore{\wxheading{Members}}}
\func{}{wxImage}{\param{const wxBitmap\&}{ bitmap}}
-Constructs an image from a platform-dependent bitmap. This preserves
+(Deprecated form, use \helpref{wxBitmap::ConvertToImage}{wxbitmapconverttoimage}
+instead.) Constructs an image from a platform-dependent bitmap. This preserves
mask information so that bitmaps and images can be converted back
and forth without loss in that respect.
Creates an image with the given width and height.
-\func{}{wxImage}{\param{const wxString\& }{name}, \param{long}{ type = wxBITMAP\_TYPE\_PNG}}
+\func{}{wxImage}{\param{int}{ width}, \param{int}{ height}, \param{unsigned char*}{ data}, \param{bool}{ static\_data=FALSE}}
-\func{}{wxImage}{\param{const wxString\& }{name}, \param{const wxString\&}{ mimetype}}
+Creates an image from given data with the given width and height. If
+{\it static\_data} is TRUE, then wxImage will not delete the actual
+image data in its destructor, otherwise it will free it by calling
+{\it free()}.
+
+\func{}{wxImage}{\param{const wxString\& }{name}, \param{long}{ type = wxBITMAP\_TYPE\_ANY}, \param{int}{ index = -1}}
+
+\func{}{wxImage}{\param{const wxString\& }{name}, \param{const wxString\&}{ mimetype}, \param{int}{ index = -1}}
Loads an image from a file.
-\func{}{wxImage}{\param{wxInputStream\& }{stream}, \param{long}{ type = wxBITMAP\_TYPE\_PNG}}
+\func{}{wxImage}{\param{wxInputStream\& }{stream}, \param{long}{ type = wxBITMAP\_TYPE\_ANY}, \param{int}{ index = -1}}
-\func{}{wxImage}{\param{wxInputStream\& }{stream}, \param{const wxString\&}{ mimetype}}
+\func{}{wxImage}{\param{wxInputStream\& }{stream}, \param{const wxString\&}{ mimetype}, \param{int}{ index = -1}}
Loads an image from an input stream.
\docparam{height}{Specifies the height of the image.}
-\docparam{name}{This refers to an image filename. Its meaning is determined by the {\it type} parameter.}
+\docparam{name}{Name of the file from which to load the image.}
-\docparam{stream}{This refers to an input stream. Its meaning is determined by the {\it type} parameter. It is equal to loading from file except that you provide opened stream (file, HTTP or any other custom class).}
+\docparam{stream}{Opened input stream from which to load the image. Currently, the stream must support seeking.}
\docparam{type}{May be one of the following:
\twocolwidtha{5cm}%
\begin{twocollist}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_BMP}}}{Load a Windows bitmap file.}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_PNG}}}{Load a PNG bitmap file.}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_JPEG}}}{Load a JPEG bitmap file.}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_GIF}}}{Load a GIF bitmap file.}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_PCX}}}{Load a PCX bitmap file.}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_PNM}}}{Load a PNM bitmap file.}
-\end{twocollist}
-
-The validity of these flags depends on the platform and wxWindows configuration.
-If all possible wxWindows settings are used, the loading a BMP (Windows bitmap) file,
-a PNG (portable network graphics) file and a JPEG file is supported on all platforms that
-implement wxImage.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_BMP}}{Load a Windows bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_GIF}}{Load a GIF bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_JPEG}}{Load a JPEG bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_PNG}}{Load a PNG bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_PCX}}{Load a PCX bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_PNM}}{Load a PNM bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_TIF}}{Load a TIFF bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_XPM}}{Load a XPM bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_ICO}}{Load a Windows icon file (ICO).}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_CUR}}{Load a Windows cursor file (CUR).}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_ANI}}{Load a Windows animated cursor file (ANI).}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_ANY}}{Will try to autodetect the format.}
+\end{twocollist}}
\docparam{mimetype}{MIME type string (for example 'image/jpeg')}
-Note : you must call wxImage::AddHandler(new wxJPEGHandler) during application
-initialization in order to work with JPEGs.
+\docparam{index}{Index of the image to load in the case that the image file contains multiple images.
+This is only used by GIF, ICO and TIFF handlers. The default value (-1) means
+"choose the default image" and is interpreted as the first image (index=0) by
+the GIF and TIFF handler and as the largest and most colourful one by the ICO handler.}
+
+\wxheading{Remarks}
+
+Depending on how wxWindows has been configured, not all formats may be available.
+
+Note: any handler other than BMP must be previously
+initialized with \helpref{wxImage::AddHandler}{wximageaddhandler} or
+\helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}.
+
+Note: you can use \helpref{GetOptionInt}{wximagegetoptionint} to get the
+hotspot for loaded cursor file:
+\begin{verbatim}
+ int hotspot_x = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X);
+ int hotspot_y = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y);
+
+\end{verbatim}
\wxheading{See also}
\pythonnote{Constructors supported by wxPython are:\par
\indented{2cm}{\begin{twocollist}
-\twocolitem{\bf{wxImage(name, flag)}}{Loads an image from a file}
-\twocolitem{\bf{wxNullImage()}}{Create a null image (has no size or
+\twocolitem{{\bf wxImage(name, flag)}}{Loads an image from a file}
+\twocolitem{{\bf wxNullImage()}}{Create a null image (has no size or
image data)}
-\twocolitem{\bf{wxEmptyImage(width, height)}}{Creates an empty image
+\twocolitem{{\bf wxEmptyImage(width, height)}}{Creates an empty image
of the given size}
-\twocolitem{\bf{wxImageFromMime(name, mimetype}}{Creates an image from
+\twocolitem{{\bf wxImageFromMime(name, mimetype}}{Creates an image from
the given file of the given mimetype}
-\twocolitem{\bf{wxImageFromBitmap(bitmap)}}{Creates an image from a
+\twocolitem{{\bf wxImageFromBitmap(bitmap)}}{Creates an image from a
platform-dependent bitmap}
\end{twocollist}}
}
+\perlnote{Constructors supported by wxPerl are:\par
+\begin{itemize}
+\item{Wx::Image->new( bitmap )}
+\item{Wx::Image->new( width, height )}
+\item{Wx::Image->new( name, type )}
+\item{Wx::Image->new( name, mimetype )}
+\end{itemize}
+}
+
\membersection{wxImage::\destruct{wxImage}}
\func{}{\destruct{wxImage}}{\void}
\helpref{wxImageHandler}{wximagehandler}
-\pythonnote{In wxPython this static method is named \tt{wxImage_AddHandler}.}
+\func{bool}{CanRead}{\param{const wxString\&}{ filename}}
+
+returns TRUE if the current image handlers can read this file
+
+\pythonnote{In wxPython this static method is named {\tt wxImage\_AddHandler}.}
\membersection{wxImage::CleanUpHandlers}
\func{static void}{CleanUpHandlers}{\void}
This function is called by wxWindows on exit.
+\membersection{wxImage::ComputeHistogram}\label{wximagecomputehistogram}
+
+\constfunc{unsigned long}{ComputeHistogram}{\param{wxImageHistogram\& }{histogram}}
+
+Computes the histogram of the image. {\it histogram} is a reference to
+wxImageHistogram object. wxImageHistogram is a specialization of
+\helpref{wxHashMap}{wxhashmap} "template" and is defined as follows:
+
+\begin{verbatim}
+class WXDLLEXPORT wxImageHistogramEntry
+{
+public:
+ wxImageHistogramEntry() : index(0), value(0) {}
+ unsigned long index;
+ unsigned long value;
+};
+
+WX_DECLARE_EXPORTED_HASH_MAP(unsigned long, wxImageHistogramEntry,
+ wxIntegerHash, wxIntegerEqual,
+ wxImageHistogram);
+\end{verbatim}
+
+\wxheading{Return value}
+
+Returns number of colours in the histogram.
+
\membersection{wxImage::ConvertToBitmap}\label{wximageconverttobitmap}
\constfunc{wxBitmap}{ConvertToBitmap}{\void}
-Converts the image to a platform-specific bitmap object. This has to be done
-to actually display an image as you cannot draw an image directly on a window.
-The resulting bitmap will use the colour depth of the current system which entails
-that a (crude) colour reduction has to take place. When in 8-bit mode, this
-routine will use a color cube created on program start-up to look up colors.
-Still, the image quality won't be perfect for photo images.
+Deprecated, use equivalent \helpref{wxBitmap constructor}{wxbitmapconstr}
+(which takes wxImage and depth as its arguments) instead.
+
+\membersection{wxImage::ConvertToMono}\label{wxbitmapconverttomono}
+
+\constfunc{wxImage}{ConvertToMono}{\param{unsigned char}{ r}, \param{unsigned char}{ g}, \param{unsigned char}{ b}}
+
+Returns monochromatic version of the image. The returned image has white
+colour where the original has {\it (r,g,b)} colour and black colour
+everywhere else.
+
+\membersection{wxImage::Copy}\label{wximagecopy}
+
+\constfunc{wxImage}{Copy}{\void}
+
+Returns an identical copy of the image.
\membersection{wxImage::Create}\label{wximagecreate}
Destroys the image data.
+\membersection{wxImage::FindFirstUnusedColour}\label{wximagefindfirstunusedcolour}
+
+\func{bool}{FindFirstUnusedColour}{\param{unsigned char *}{ r}, \param{unsigned char *}{ g}, \param{unsigned char *}{ b}, \param{unsigned char}{ startR = 1}, \param{unsigned char}{ startG = 0}, \param{unsigned char}{ startB = 0}}
+
+\wxheading{Parameters}
+
+\docparam{r,g,b}{Pointers to variables to save the colour.}
+
+\docparam{startR,startG,startB}{Initial values of the colour. Returned colour
+will have RGB values equal to or greater than these.}
+
+Finds the first colour that is never used in the image. The search begins at
+given initial colour and continues by increasing R, G and B components (in this
+order) by 1 until an unused colour is found or the colour space exhausted.
+
+\wxheading{Return value}
+
+Returns FALSE if there is no unused colour left, TRUE on success.
+
+\wxheading{Notes}
+
+Note that this method involves computing the histogram, which is
+computationally intensive operation.
+
\membersection{wxImage::FindHandler}
\func{static wxImageHandler*}{FindHandler}{\param{const wxString\& }{name}}
Returns the image data as an array. This is most often used when doing
direct image manipulation. The return value points to an array of
-chararcters in RGBGBRGB... format.
+characters in RGBRGBRGB$\ldots$ format.
+
+You should not delete the returned pointer nor pass it to
+\helpref{wxImage::SetData}{wximagesetdata}.
\membersection{wxImage::GetGreen}\label{wximagegetgreen}
Returns the green intensity at the given coordinate.
+\membersection{wxImage::GetImageCount}\label{wximagegetimagecount}
+
+\func{static int}{GetImageCount}{\param{const wxString\&}{ filename}, \param{long}{ type = wxBITMAP\_TYPE\_ANY}}
+
+\func{static int}{GetImageCount}{\param{wxInputStream\&}{ stream}, \param{long}{ type = wxBITMAP\_TYPE\_ANY}}
+
+If the image file contains more than one image and the image handler is capable
+of retrieving these individually, this function will return the number of
+available images.
+
+\docparam{name}{Name of the file to query.}
+
+\docparam{stream}{Opened input stream with image data. Currently, the stream must support seeking.}
+
+\docparam{type}{May be one of the following:
+
+\twocolwidtha{5cm}%
+\begin{twocollist}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_BMP}}{Load a Windows bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_GIF}}{Load a GIF bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_JPEG}}{Load a JPEG bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_PNG}}{Load a PNG bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_PCX}}{Load a PCX bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_PNM}}{Load a PNM bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_TIF}}{Load a TIFF bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_XPM}}{Load a XPM bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_ICO}}{Load a Windows icon file (ICO).}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_CUR}}{Load a Windows cursor file (CUR).}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_ANI}}{Load a Windows animated cursor file (ANI).}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_ANY}}{Will try to autodetect the format.}
+\end{twocollist}}
+
+\wxheading{Return value}
+
+Number of available images. For most image handlers, this is 1 (exceptions
+are TIFF and ICO formats).
+
\membersection{wxImage::GetRed}\label{wximagegetred}
\constfunc{unsigned char}{GetRed}{\param{int}{ x}, \param{int}{ y}}
Gets the red value of the mask colour.
+\membersection{wxImage::GetPalette}\label{wximagegetpalette}
+
+\constfunc{const wxPalette\&}{GetPalette}{\void}
+
+Returns the palette associated with the image. Currently the palette is only
+used when converting to wxBitmap under Windows.
+
+Eventually wxImage handlers will set the palette if one exists in the image file.
+
\membersection{wxImage::GetSubImage}\label{wximagegetsubimage}
-\constfunc{wxImage}{GetSubImage}{\param{const wxRect&}{rect}}
+\constfunc{wxImage}{GetSubImage}{\param{const wxRect\&}{ rect}}
Returns a sub image of the current one as long as the rect belongs entirely to
the image.
Returns TRUE if there is a mask active, FALSE otherwise.
+\membersection{wxImage::GetOption}\label{wximagegetoption}
+
+\constfunc{wxString}{GetOption}{\param{const wxString\&}{ name}}
+
+Gets a user-defined option. The function is case-insensitive to {\it name}.
+
+For example, when saving as a JPEG file, the option {\bf quality} is
+used, which is a number between 0 and 100 (0 is terrible, 100 is very good).
+
+\wxheading{See also}
+
+\helpref{wxImage::SetOption}{wximagesetoption},\rtfsp
+\helpref{wxImage::GetOptionInt}{wximagegetoptionint},\rtfsp
+\helpref{wxImage::HasOption}{wximagehasoption}
+
+\membersection{wxImage::GetOptionInt}\label{wximagegetoptionint}
+
+\constfunc{int}{GetOptionInt}{\param{const wxString\&}{ name}}
+
+Gets a user-defined option as an integer. The function is case-insensitive to {\it name}.
+
+\wxheading{See also}
+
+\helpref{wxImage::SetOption}{wximagesetoption},\rtfsp
+\helpref{wxImage::GetOption}{wximagegetoption},\rtfsp
+\helpref{wxImage::HasOption}{wximagehasoption}
+
+\membersection{wxImage::HasOption}\label{wximagehasoption}
+
+\constfunc{bool}{HasOption}{\param{const wxString\&}{ name}}
+
+Returns TRUE if the given option is present. The function is case-insensitive to {\it name}.
+
+\wxheading{See also}
+
+\helpref{wxImage::SetOption}{wximagesetoption},\rtfsp
+\helpref{wxImage::GetOption}{wximagegetoption},\rtfsp
+\helpref{wxImage::GetOptionInt}{wximagegetoptionint}
+
\membersection{wxImage::InitStandardHandlers}
\func{static void}{InitStandardHandlers}{\void}
Internal use only. Adds standard image format handlers. It only install BMP
-for the time being, which is use by wxBitmap.
+for the time being, which is used by wxBitmap.
This function is called by wxWindows on startup, and shouldn't be called by
the user.
\wxheading{See also}
-\helpref{wxImageHandler}{wximagehandler}
+\helpref{wxImageHandler}{wximagehandler},
\helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}
\membersection{wxImage::InsertHandler}
\membersection{wxImage::LoadFile}\label{wximageloadfile}
-\func{bool}{LoadFile}{\param{const wxString\&}{ name}, \param{long}{ type = wxBITMAP\_TYPE\_ANY}}
+\func{bool}{LoadFile}{\param{const wxString\&}{ name}, \param{long}{ type = wxBITMAP\_TYPE\_ANY}, \param{int}{ index = -1}}
-\func{bool}{LoadFile}{\param{const wxString\&}{ name}, \param{const wxString\&}{ mimetype}}
+\func{bool}{LoadFile}{\param{const wxString\&}{ name}, \param{const wxString\&}{ mimetype}, \param{int}{ index = -1}}
Loads an image from a file. If no handler type is provided, the library will
-try to use wxBITMAP\_TYPE\_BMP.
+try to autodetect the format.
-\func{bool}{LoadFile}{\param{wxInputStream\&}{ stream}, \param{long}{ type}}
+\func{bool}{LoadFile}{\param{wxInputStream\&}{ stream}, \param{long}{ type}, \param{int}{ index = -1}}
-\func{bool}{LoadFile}{\param{wxInputStream\&}{ stream}, \param{const wxString\&}{ mimetype}}
+\func{bool}{LoadFile}{\param{wxInputStream\&}{ stream}, \param{const wxString\&}{ mimetype}, \param{int}{ index = -1}}
Loads an image from an input stream.
\wxheading{Parameters}
-\docparam{name}{A filename.
-The meaning of {\it name} is determined by the {\it type} parameter.}
+\docparam{name}{Name of the file from which to load the image.}
-\docparam{stream}{An input stream.
-The meaning of {\it stream} data is determined by the {\it type} parameter.}
+\docparam{stream}{Opened input stream from which to load the image. Currently, the stream must support seeking.}
\docparam{type}{One of the following values:
\twocolitem{{\bf wxBITMAP\_TYPE\_PCX}}{Load a PCX image file.}
\twocolitem{{\bf wxBITMAP\_TYPE\_PNG}}{Load a PNG image file.}
\twocolitem{{\bf wxBITMAP\_TYPE\_PNM}}{Load a PNM image file.}
-\end{twocollist}
-
-The validity of these flags depends on the platform and wxWindows configuration.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_TIF}}{Load a TIFF image file.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_XPM}}{Load a XPM image file.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_ICO}}{Load a Windows icon file (ICO).}
+\twocolitem{{\bf wxBITMAP\_TYPE\_CUR}}{Load a Windows cursor file (CUR).}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_ANI}}{Load a Windows animated cursor file (ANI).}
+\twocolitem{{\bf wxBITMAP\_TYPE\_ANY}}{Will try to autodetect the format.}
+\end{twocollist}}
\docparam{mimetype}{MIME type string (for example 'image/jpeg')}
+\docparam{index}{Index of the image to load in the case that the image file contains multiple images.
+This is only used by GIF, ICO and TIFF handlers. The default value (-1) means
+"choose the default image" and is interpreted as the first image (index=0) by
+the GIF and TIFF handler and as the largest and most colourful one by the ICO handler.}
+
+\wxheading{Remarks}
+
+Depending on how wxWindows has been configured, not all formats may be available.
+
+Note: you can use \helpref{GetOptionInt}{wximagegetoptionint} to get the
+hotspot for loaded cursor file:
+\begin{verbatim}
+ int hotspot_x = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X);
+ int hotspot_y = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y);
+
+\end{verbatim}
+
\wxheading{Return value}
-TRUE if the operation succeeded, FALSE otherwise.
+TRUE if the operation succeeded, FALSE otherwise. If the optional index parameter is out of range,
+FALSE is returned and a call to wxLogError() takes place.
\wxheading{See also}
\pythonnote{In place of a single overloaded method name, wxPython
implements the following methods:\par
\indented{2cm}{\begin{twocollist}
-\twocolitem{\bf{LoadFile(filename, type)}}{Loads an image of the given
+\twocolitem{{\bf LoadFile(filename, type)}}{Loads an image of the given
type from a file}
-\twocolitem{\bf{LoadMimeFile(filename, mimetype)}}{Loads an image of the given
+\twocolitem{{\bf LoadMimeFile(filename, mimetype)}}{Loads an image of the given
mimetype from a file}
\end{twocollist}}
}
+\perlnote{Methods supported by wxPerl are:\par
+\begin{itemize}
+\item{bitmap->LoadFile( name, type )}
+\item{bitmap->LoadFile( name, mimetype )}
+\end{itemize}
+}
+
\membersection{wxImage::Ok}\label{wximageok}
\membersection{wxImage::SaveFile}\label{wximagesavefile}
-\func{bool}{SaveFile}{\param{const wxString\& }{name}, \param{int}{ type}}
+\constfunc{bool}{SaveFile}{\param{const wxString\& }{name}, \param{int}{ type}}
-\func{bool}{SaveFile}{\param{const wxString\& }{name}, \param{const wxString\&}{ mimetype}}
+\constfunc{bool}{SaveFile}{\param{const wxString\& }{name}, \param{const wxString\&}{ mimetype}}
-Saves a image in the named file.
+Saves an image in the named file.
-\func{bool}{SaveFile}{\param{wxOutputStream\& }{stream}, \param{int}{ type}}
+\constfunc{bool}{SaveFile}{\param{const wxString\& }{name}}
-\func{bool}{SaveFile}{\param{wxOutputStream\& }{stream}, \param{const wxString\&}{ mimetype}}
+Saves an image in the named file. File type is determined from the extension of the
+file name. Note that this function may fail if the extension is not recognized! You
+can use one of the forms above to save images to files with non-standard extensions.
-Saves a image in the given stream.
+\constfunc{bool}{SaveFile}{\param{wxOutputStream\& }{stream}, \param{int}{ type}}
+
+\constfunc{bool}{SaveFile}{\param{wxOutputStream\& }{stream}, \param{const wxString\&}{ mimetype}}
+
+Saves an image in the given stream.
\wxheading{Parameters}
-\docparam{name}{A filename. The meaning of {\it name} is determined by the {\it type} parameter.}
+\docparam{name}{Name of the file to save the image to.}
-\docparam{stream}{An output stream. The meaning of {\it stream} is determined by the {\it type} parameter.}
+\docparam{stream}{Opened output stream to save the image to.}
-\docparam{type}{Currently two types can be used:
+\docparam{type}{Currently these types can be used:
\twocolwidtha{5cm}%
\begin{twocollist}
-\twocolitem{{\bf wxBITMAP\_TYPE\_PNG}}{Save a PNG image file.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_BMP}}{Save a BMP image file.}
\twocolitem{{\bf wxBITMAP\_TYPE\_JPEG}}{Save a JPEG image file.}
-\end{twocollist}
-
-The validity of these flags depends on the platform and wxWindows configuration
-as well as user-added handlers.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_PNG}}{Save a PNG image file.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_PCX}}{Save a PCX image file (tries to save as 8-bit if possible, falls back to 24-bit otherwise).}
+\twocolitem{{\bf wxBITMAP\_TYPE\_PNM}}{Save a PNM image file (as raw RGB always).}
+\twocolitem{{\bf wxBITMAP\_TYPE\_TIFF}}{Save a TIFF image file.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_XPM}}{Save a XPM image file.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_ICO}}{Save a Windows icon file (ICO) (the size may be up to 255 wide by 127 high. A single image is saved in 8 colors at the size supplied).}
+\twocolitem{{\bf wxBITMAP\_TYPE\_CUR}}{Save a Windows cursor file (CUR).}
+\end{twocollist}}
\docparam{mimetype}{MIME type.}
Depending on how wxWindows has been configured, not all formats may be available.
+Note: you can use \helpref{GetOptionInt}{wximagegetoptionint} to set the
+hotspot before saving an image into a cursor file (default hotspot is in
+the centre of the image):
+\begin{verbatim}
+ image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, hotspotX);
+ image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, hotspotY);
+
+\end{verbatim}
+
\wxheading{See also}
\helpref{wxImage::LoadFile}{wximageloadfile}
\pythonnote{In place of a single overloaded method name, wxPython
implements the following methods:\par
\indented{2cm}{\begin{twocollist}
-\twocolitem{\bf{SaveFile(filename, type)}}{Saves the image using the given
+\twocolitem{{\bf SaveFile(filename, type)}}{Saves the image using the given
type to the named file}
-\twocolitem{\bf{SaveMimeFile(filename, mimetype)}}{Saves the image using the given
+\twocolitem{{\bf SaveMimeFile(filename, mimetype)}}{Saves the image using the given
mimetype to the named file}
\end{twocollist}}
}
+\perlnote{Methods supported by wxPerl are:\par
+\begin{itemize}
+\item{bitmap->SaveFile( name, type )}
+\item{bitmap->SaveFile( name, mimetype )}
+\end{itemize}
+}
+
+\membersection{wxImage::Mirror}\label{wximagemirror}
+
+\constfunc{wxImage}{Mirror}{\param{bool}{ horizontally = TRUE}}
+
+Returns a mirrored copy of the image. The parameter {\it horizontally}
+indicates the orientation.
+
+\membersection{wxImage::Replace}\label{wximagereplace}
+
+\func{void}{Replace}{\param{unsigned char}{ r1}, \param{unsigned char}{ g1}, \param{unsigned char}{ b1},
+\param{unsigned char}{ r2}, \param{unsigned char}{ g2}, \param{unsigned char}{ b2}}
+
+Replaces the colour specified by {\it r1,g1,b1} by the colour {\it r2,g2,b2}.
+
\membersection{wxImage::Rescale}\label{wximagerescale}
\func{wxImage \&}{Rescale}{\param{int}{ width}, \param{int}{ height}}
\helpref{Scale}{wximagescale}
+\membersection{wxImage::Rotate}\label{wximagerotate}
+
+\func{wxImage}{Rotate}{\param{double}{ angle}, \param{const wxPoint\& }{rotationCentre},
+ \param{bool}{ interpolating = TRUE}, \param{wxPoint*}{ offsetAfterRotation = NULL}}
+
+Rotates the image about the given point, by {\it angle} radians. Passing TRUE
+to {\it interpolating} results in better image quality, but is slower. If the
+image has a mask, then the mask colour is used for the uncovered pixels in the
+rotated image background. Else, black (rgb 0, 0, 0) will be used.
+
+Returns the rotated image, leaving this image intact.
+
+\membersection{wxImage::Rotate90}\label{wximagerotate90}
+
+\constfunc{wxImage}{Rotate90}{\param{bool}{ clockwise = TRUE}}
+
+Returns a copy of the image rotated 90 degrees in the direction
+indicated by {\it clockwise}.
+
\membersection{wxImage::Scale}\label{wximagescale}
\constfunc{wxImage}{Scale}{\param{int}{ width}, \param{int}{ height}}
scaling bitmaps in general as the only other way to scale bitmaps
is to blit a wxMemoryDC into another wxMemoryDC.
-It may be mentioned that the GTK post uses this function internally
-to scale bitmaps when using mapping mode in wxDC.
+It may be mentioned that the GTK port uses this function internally
+to scale bitmaps when using mapping modes in wxDC.
Example:
if ( bmp.GetWidth() != 32 || bmp.GetHeight() != 32 )
{
wxImage image(bmp);
- bmp = image.Scale(32, 32).ConvertToBitmap();
+ bmp = wxBitmap(image.Scale(32, 32));
// another possibility:
image.Rescale(32, 32);
the size (width*height*3) or results will be unexpected. Don't use this
method if you aren't sure you know what you are doing.
+The data must have been allocated with malloc(), NOT with operator new.
+
+After this call the pointer to the data is owned by the wxImage object,
+that will be responsible for deleting it.
+Do not pass to this function a pointer obtained through
+\helpref{wxImage::GetData}{wximagegetdata}.
+
\membersection{wxImage::SetMask}\label{wximagesetmask}
\func{void}{SetMask}{\param{bool}{ hasMask = TRUE}}
Sets the mask colour for this image (and tells the image to use the mask).
+\membersection{wxImage::SetMaskFromImage}\label{wximagesetmaskfromimage}
+
+\func{bool}{SetMaskFromImage}{\param{const wxImage\&}{ mask}, \param{unsigned char}{ mr}, \param{unsigned char}{ mg}, \param{unsigned char}{ mb}}
+
+\wxheading{Parameters}
+
+\docparam{mask}{The mask image to extract mask shape from. Must have same dimensions as the image.}
+
+\docparam{mr,mg,mb}{RGB value of pixels in {\it mask} that will be used to create the mask.}
+
+Sets image's mask so that the pixels that have RGB value of {\it mr,mg,mb}
+in {\it mask} will be masked in the image. This is done by first finding an
+unused colour in the image, setting this colour as the mask colour and then
+using this colour to draw all pixels in the image who corresponding pixel
+in {\it mask} has given RGB value.
+
+\wxheading{Return value}
+
+Returns FALSE if {\it mask} does not have same dimensions as the image or if
+there is no unused colour left. Returns TRUE if the mask was successfully
+applied.
+
+\wxheading{Notes}
+
+Note that this method involves computing the histogram, which is
+computationally intensive operation.
+
+\membersection{wxImage::SetOption}\label{wximagesetoption}
+
+\func{void}{SetOption}{\param{const wxString\&}{ name}, \param{const wxString\&}{ value}}
+
+\func{void}{SetOption}{\param{const wxString\&}{ name}, \param{int}{ value}}
+
+Sets a user-defined option. The function is case-insensitive to {\it name}.
+
+For example, when saving as a JPEG file, the option {\bf quality} is
+used, which is a number between 0 and 100 (0 is terrible, 100 is very good).
+
+\wxheading{See also}
+
+\helpref{wxImage::GetOption}{wximagegetoption},\rtfsp
+\helpref{wxImage::GetOptionInt}{wximagegetoptionint},\rtfsp
+\helpref{wxImage::HasOption}{wximagehasoption}
+
+\membersection{wxImage::SetPalette}\label{wximagesetpalette}
+
+\func{void}{SetPalette}{\param{const wxPalette\&}{ palette}}
+
+Associates a palette with the image. The palette may be used when converting
+wxImage to wxBitmap (MSW only at present) or in file save operations (none as yet).
+
\membersection{wxImage::SetRGB}\label{wximagesetrgb}
-\func{void}{SetRGB}{\param{int }{x}, \param{int }{y}, \param{unsigned char }{red}, \param{unsigned char }{blue}, \param{unsigned char }{green}}
+\func{void}{SetRGB}{\param{int }{x}, \param{int }{y}, \param{unsigned char }{red}, \param{unsigned char }{green}, \param{unsigned char }{blue}}
Sets the pixel at the given coordinate. This routine performs bounds-checks
for the coordinate so it can be considered a safe way to manipulate the
data, but in some cases this might be too slow so that the data will have to
-be set directly. In that case you have to get that data by calling GetData().
+be set directly. In that case you will have to get access to the image data
+using the \helpref{GetData}{wximagegetdata} method.
\membersection{wxImage::operator $=$}
\membersection{wxImage::operator $==$}
-\func{bool}{operator $==$}{\param{const wxImage\& }{image}}
+\constfunc{bool}{operator $==$}{\param{const wxImage\& }{image}}
Equality operator. This operator tests whether the internal data pointers are
equal (a fast test).
\membersection{wxImage::operator $!=$}
-\func{bool}{operator $!=$}{\param{const wxImage\& }{image}}
+\constfunc{bool}{operator $!=$}{\param{const wxImage\& }{image}}
Inequality operator. This operator tests whether the internal data pointers are
unequal (a fast test).
\wxheading{See also}
-\helpref{wxImage}{wximage}
+\helpref{wxImage}{wximage},
\helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}
\latexignore{\rtfignore{\wxheading{Members}}}
of retrieving these individually, this function will return the number of
available images.
-\docparam{stream}{Opened input stream for reading image file.}
+\docparam{stream}{Opened input stream for reading image data. Currently, the stream must support seeking.}
\wxheading{Return value}
-Number of available images. For most image handles, this defaults to 1.
+Number of available images. For most image handlers, this is 1 (exceptions
+are TIFF and ICO formats).
\membersection{wxImageHandler::GetType}
\docparam{image}{The image object which is to be affected by this operation.}
-\docparam{stream}{Opened input stream for reading images.}
+\docparam{stream}{Opened input stream for reading image data.}
\docparam{verbose}{If set to TRUE, errors reported by the image handler will produce wxLogMessages.}
\wxheading{See also}
-\helpref{wxImage::LoadFile}{wximageloadfile}\\
-\helpref{wxImage::SaveFile}{wximagesavefile}\\
+\helpref{wxImage::LoadFile}{wximageloadfile},
+\helpref{wxImage::SaveFile}{wximagesavefile},
\helpref{wxImageHandler::SaveFile}{wximagehandlersavefile}
\membersection{wxImageHandler::SaveFile}\label{wximagehandlersavefile}
\docparam{image}{The image object which is to be affected by this operation.}
-\docparam{stream}{An opened stream for writing images.}
+\docparam{stream}{Opened output stream for writing the data.}
\wxheading{Return value}
\wxheading{See also}
-\helpref{wxImage::LoadFile}{wximageloadfile}\\
-\helpref{wxImage::SaveFile}{wximagesavefile}\\
+\helpref{wxImage::LoadFile}{wximageloadfile},
+\helpref{wxImage::SaveFile}{wximagesavefile},
\helpref{wxImageHandler::LoadFile}{wximagehandlerloadfile}
\membersection{wxImageHandler::SetName}
\docparam{extension}{Handler extension.}
-\membersection{wxImageHandler::SetType}
+\membersection{wxImageHandler::SetMimeType}\label{wximagehandlersetmimetype}
-\func{void}{SetType}{\param{long }{type}}
+\func{void}{SetMimeType}{\param{const wxString\& }{mimetype}}
-Sets the handler type.
+Sets the handler MIME type.
\wxheading{Parameters}
-\docparam{name}{Handler type.}
-
+\docparam{mimename}{Handler MIME type.}
-\membersection{wxImageHandler::SetMimeType}
+\membersection{wxImageHandler::SetType}
-\func{void}{SetMimeType}{\param{const wxString\& }{mimetype}}
+\func{void}{SetType}{\param{long }{type}}
-Sets the handler MIME type.
+Sets the handler type.
\wxheading{Parameters}
-\docparam{mimename}{Handler MIME type.}
+\docparam{name}{Handler type.}
projects / wxWidgets.git / blobdiff