\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}.
-This class is currently only available under GTK and Windows.
+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 appropiate
+handler with \helpref{wxImage::AddHandler}{wximageaddhandler} or
+\helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}.
+
+\twocolwidtha{5cm}%
+\begin{twocollist}
+\twocolitem{\indexit{wxBMPHandler}}{Only for loading, 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{wxXPMHandler}}{For loading and saving.}
+\twocolitem{\indexit{wxICOHandler}}{For loading and saving.}
+\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}
\helpref{wxObject}{wxobject}
+\wxheading{Include files}
+
+<wx/image.h>
+
\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 = wxIMAGE\_TYPE\_PNG}}
+\func{}{wxImage}{\param{int}{ width}, \param{int}{ height}, \param{unsigned char*}{ data}, \param{bool}{ static\_data=FALSE}}
+
+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}}
+
+\func{}{wxImage}{\param{const wxString\& }{name}, \param{const wxString\&}{ mimetype}}
Loads an image from a file.
+\func{}{wxImage}{\param{wxInputStream\& }{stream}, \param{long}{ type = wxBITMAP\_TYPE\_ANY}}
+
+\func{}{wxImage}{\param{wxInputStream\& }{stream}, \param{const wxString\&}{ mimetype}}
+
+Loads an image from an input stream.
+
\wxheading{Parameters}
\docparam{width}{Specifies the width of the image.}
\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}{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}
+\twocolwidtha{5cm}%
\begin{twocollist}
-\twocolitem{{\bf \indexit{wxIMAGE\_TYPE\_BMP}}}{Load a Windows bitmap file.}
-\twocolitem{{\bf \indexit{wxIMAGE\_TYPE\_PNG}}}{Load a PNG bitmap file.}
-\end{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 ICO Icon file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_ANY}}{Will try to autodetect the format.}
+\end{twocollist}}
+
+\docparam{mimetype}{MIME type string (for example 'image/jpeg')}
-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
-and a PNG (portable network graphics) file is supported on all platforms that
-implement wxImage.}
+\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}.
\wxheading{See also}
\helpref{wxImage::LoadFile}{wximageloadfile}
+\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
+image data)}
+\twocolitem{{\bf wxEmptyImage(width, height)}}{Creates an empty image
+of the given size}
+\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
+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}.}
\membersection{wxImage::CleanUpHandlers}
\func{static void}{CleanUpHandlers}{\void}
\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. Especially when converting
-to 8-bit (or even less) bitmaps, the routine is slow and will reduce the
-quality of the resulting bitmap. A proper set of colour reduction methods has
-not yet been written.
+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}}
Finds the handler associated with the given image type.
+\func{static wxImageHandler*}{FindHandlerMime}{\param{const wxString\& }{mimetype}}
+
+Finds the handler associated with the given MIME type.
+
\docparam{name}{The handler name.}
\docparam{extension}{The file extension, such as ``bmp".}
-\docparam{imageType}{The image type, such as wxIMAGE\_TYPE\_BMP.}
+\docparam{imageType}{The image type, such as wxBITMAP\_TYPE\_BMP.}
+
+\docparam{mimetype}{MIME type.}
\wxheading{Return value}
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}}
+
+Returns a sub image of the current one as long as the rect belongs entirely to
+the image.
+
\membersection{wxImage::GetWidth}\label{wximagegetwidth}
\constfunc{int}{GetWidth}{\void}
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}
-Adds the standard image format handlers, which, depending on wxWindows
-configuration, can be handlers for Windows BMP (loading) and PNG
-(loading and saving) file formats.
+Internal use only. Adds standard image format handlers. It only install BMP
+for the time being, which is used by wxBitmap.
-This function is called by wxWindows on startup.
+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}}
+\func{bool}{LoadFile}{\param{const wxString\&}{ name}, \param{long}{ type = wxBITMAP\_TYPE\_ANY}}
-Loads an image from a file.
+\func{bool}{LoadFile}{\param{const wxString\&}{ name}, \param{const wxString\&}{ mimetype}}
+
+Loads an image from a file. If no handler type is provided, the library will
+try to autodetect the format.
+
+\func{bool}{LoadFile}{\param{wxInputStream\&}{ stream}, \param{long}{ type}}
+
+\func{bool}{LoadFile}{\param{wxInputStream\&}{ stream}, \param{const wxString\&}{ mimetype}}
+
+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}{Opened input stream from which to load the image. Currently, the stream must support seeking.}
\docparam{type}{One of the following values:
-\twocolwidtha{5cm}
+\twocolwidtha{5cm}%
\begin{twocollist}
-\twocolitem{{\bf wxIMAGE\_TYPE\_BMP}}{Load a Windows image file.}
-\twocolitem{{\bf wxIMAGE\_TYPE\_PNG}}{Load a PNG image file.}
-\end{twocollist}
+\twocolitem{{\bf wxBITMAP\_TYPE\_BMP}}{Load a Windows image file.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_GIF}}{Load a GIF image file.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_JPEG}}{Load a JPEG image file.}
+\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.}
+\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 ICO icon file.}
+\twocolitem{{\bf wxBITMAP\_TYPE\_ANY}}{Will try to autodetect the format.}
+\end{twocollist}}
+
+\docparam{mimetype}{MIME type string (for example 'image/jpeg')}
+
+\wxheading{Remarks}
+
+Depending on how wxWindows has been configured, not all formats may be available.
-The validity of these flags depends on the platform and wxWindows configuration.}
+wxBITMAP\_TYPE\_ICO will laod the largest image found, with the most colours
\wxheading{Return value}
\helpref{wxImage::SaveFile}{wximagesavefile}
+\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
+type from a file}
+\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}
\constfunc{bool}{Ok}{\void}
\func{bool}{SaveFile}{\param{const wxString\& }{name}, \param{int}{ type}}
+\func{bool}{SaveFile}{\param{const wxString\& }{name}, \param{const wxString\&}{ mimetype}}
+
Saves a image in the named file.
+\func{bool}{SaveFile}{\param{wxOutputStream\& }{stream}, \param{int}{ type}}
+
+\func{bool}{SaveFile}{\param{wxOutputStream\& }{stream}, \param{const wxString\&}{ mimetype}}
+
+Saves a 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{type}{Currently only one type can be used:
+\docparam{stream}{Opened output stream to save the image to.}
-\twocolwidtha{5cm}
+\docparam{type}{Currently three types can be used:
+
+\twocolwidtha{5cm}%
\begin{twocollist}
-\twocolitem{{\bf wxIMAGE\_TYPE\_PNG}}{Save a PNG image file.}
-\end{twocollist}
+\twocolitem{{\bf wxBITMAP\_TYPE\_JPEG}}{Save a JPEG image file.}
+\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 ICO image file. (The size may be up to 255 wide by 127 high. A single image is saved in 8 colors at the size supplied.)}
+\end{twocollist}}
-The validity of these flags depends on the platform and wxWindows configuration
-as well as user-added handlers.}
+\docparam{mimetype}{MIME type.}
\wxheading{Return value}
\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
+type to the named file}
+\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}}
+
+Changes the size of the image in-place: after a call to this function, the
+image will have the given width and height.
+
+Returns the (modified) image itself.
+
+\wxheading{See also}
+
+\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}
-\func{wxImage}{Scale}{\param{int}{ width}, \param{int}{ height}}
+\constfunc{wxImage}{Scale}{\param{int}{ width}, \param{int}{ height}}
Returns a scaled version of the image. This is also useful for
scaling bitmaps in general as the only other way to scale bitmaps
-is do blit a wxMemoryDC into another wxMemoryDC. Windows can such scaling
-itself, but on GTK scaling bitmaps is done using this routine
-internally.
+is to blit a wxMemoryDC into another wxMemoryDC.
+
+It may be mentioned that the GTK port uses this function internally
+to scale bitmaps when using mapping modes in wxDC.
+
+Example:
+
+\begin{verbatim}
+ // get the bitmap from somewhere
+ wxBitmap bmp = ...;
+
+ // rescale it to have size of 32*32
+ if ( bmp.GetWidth() != 32 || bmp.GetHeight() != 32 )
+ {
+ wxImage image(bmp);
+ bmp = wxBitmap(image.Scale(32, 32));
+
+ // another possibility:
+ image.Rescale(32, 32);
+ bmp = image;
+ }
+
+\end{verbatim}
+
+\wxheading{See also}
+
+\helpref{Rescale}{wximagerescale}
\membersection{wxImage::SetData}\label{wximagesetdata}
\func{void}{SetData}{\param{unsigned char*}{data}}
-Sets the image data without performing checks. The data given must have
+Sets the image data without performing checks. The data given must have
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.
\func{void}{SetMaskColour}{\param{unsigned char }{red}, \param{unsigned char }{blue}, \param{unsigned char }{green}}
-Sets the mask colour for this image.
+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 $=$}
and add the handler using \helpref{wxImage::AddHandler}{wximageaddhandler} in your
application initialisation.
+\wxheading{Note (Legal Issue)}
+
+This software is based in part on the work of the Independent JPEG Group.
+
+(Applies when wxWindows is linked with JPEG support. wxJPEGHandler uses libjpeg
+created by IJG.)
+
\wxheading{Derived from}
\helpref{wxObject}{wxobject}
+\wxheading{Include files}
+
+<wx/image.h>
+
\wxheading{See also}
-\helpref{wxImage}{wximage}
+\helpref{wxImage}{wximage},
+\helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}
\latexignore{\rtfignore{\wxheading{Members}}}
Gets the file extension associated with this handler.
+\membersection{wxImageHandler::GetImageCount}\label{wximagehandlergetimagecount}
+
+\func{int}{GetImageCount}{\param{wxInputStream\&}{ stream}}
+
+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{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.
+
\membersection{wxImageHandler::GetType}
\constfunc{long}{GetType}{\void}
Gets the image type associated with this handler.
+\membersection{wxImageHandler::GetMimeType}
+
+\constfunc{wxString}{GetMimeType}{\void}
+
+Gets the MIME type associated with this handler.
+
\membersection{wxImageHandler::LoadFile}\label{wximagehandlerloadfile}
-\func{bool}{LoadFile}{\param{wxImage* }{image}, \param{const wxString\&}{ name}}
+\func{bool}{LoadFile}{\param{wxImage* }{image}, \param{wxInputStream\&}{ stream}, \param{bool}{ verbose=TRUE}, \param{int}{ index=0}}
-Loads a image from a file or resource, putting the resulting data into {\it image}.
+Loads a image from a stream, putting the resulting data into {\it image}. If the image file contains
+more than one image and the image handler is capable of retrieving these individually, {\it index}
+indicates which image to read from the stream.
\wxheading{Parameters}
\docparam{image}{The image object which is to be affected by this operation.}
-\docparam{name}{Either a filename or a Windows resource name.
-The meaning of {\it name} is determined by the {\it type} parameter.}
+\docparam{stream}{Opened input stream for reading image data.}
+
+\docparam{verbose}{If set to TRUE, errors reported by the image handler will produce wxLogMessages.}
+
+\docparam{index}{The index of the image in the file (starting from zero).}
\wxheading{Return value}
\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}
-\func{bool}{SaveFile}{\param{wxImage* }{image}, \param{const wxString\& }{name}}
+\func{bool}{SaveFile}{\param{wxImage* }{image}, \param{wxOutputStream\& }{stream}}
-Saves a image in the named file.
+Saves a image in the output stream.
\wxheading{Parameters}
\docparam{image}{The image object which is to be affected by this operation.}
-\docparam{name}{A filename. The meaning of {\it name} is determined by the {\it type} parameter.}
+\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::SetMimeType}\label{wximagehandlersetmimetype}
+
+\func{void}{SetMimeType}{\param{const wxString\& }{mimetype}}
+
+Sets the handler MIME type.
+
+\wxheading{Parameters}
+
+\docparam{mimename}{Handler MIME type.}
+
\membersection{wxImageHandler::SetType}
\func{void}{SetType}{\param{long }{type}}
\docparam{name}{Handler type.}
-
projects / wxWidgets.git / blobdiff