X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/7468b994be5579ff57516f07e2d771831e73f65e..76ff52f7c9f4e0c33f44e2e3564b74530bab2641:/docs/latex/wx/image.tex?ds=sidebyside

diff --git a/docs/latex/wx/image.tex b/docs/latex/wx/image.tex
index 87ead917f6..78a3f2f121 100644
--- a/docs/latex/wx/image.tex
+++ b/docs/latex/wx/image.tex
@@ -14,6 +14,31 @@ 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 appropiate
+handler with \helpref{wxImage::AddHandler}{wximageaddhandler} or 
+\helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}.
+
+\twocolwidtha{5cm}%
+\begin{twocollist}
+\twocolitem{{\bf \indexit{wxBMPHandler}}}{Only for loading, always installed.}
+\twocolitem{{\bf \indexit{wxPNGHandler}}}{For loading and saving.}
+\twocolitem{{\bf \indexit{wxJPEGHandler}}}{For loading and saving.}
+\twocolitem{{\bf \indexit{wxGIFHandler}}}{Only for loading, due to legal issues.}
+\twocolitem{{\bf \indexit{wxPCXHandler}}}{For loading and saving (see below).}
+\twocolitem{{\bf \indexit{wxPNMHandler}}}{For loading and saving (see below).}
+\twocolitem{{\bf \indexit{wxTIFFHandler}}}{For loading.}
+\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}
@@ -24,7 +49,7 @@ creation of a \helpref{wxMask}{wxmask} object associated to the bitmap object.
 
 \wxheading{See also}
 
-\helpref{wxBitmap}{wxbitmap}
+\helpref{wxBitmap}{wxbitmap}, 
 \helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}
 
 \latexignore{\rtfignore{\wxheading{Members}}}
@@ -49,13 +74,20 @@ 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}}
+
+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\_PNG}}
+\func{}{wxImage}{\param{wxInputStream\& }{stream}, \param{long}{ type = wxBITMAP\_TYPE\_ANY}}
 
 \func{}{wxImage}{\param{wxInputStream\& }{stream}, \param{const wxString\&}{ mimetype}}
 
@@ -67,31 +99,33 @@ 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\_JPEG}}}{Load a JPEG bitmap file.}
+\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_PNG}}}{Load a PNG 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{{\bf \indexit{wxBITMAP\_TYPE\_TIF}}}{Load a TIFF bitmap file.}
+\twocolitem{{\bf \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.
+\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}
 
@@ -111,6 +145,15 @@ 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}
@@ -153,6 +196,16 @@ on program start-up to look up colors. This ensures a very fast conversion, but
 the image quality won't be perfect (and could be better for photo images using more
 sophisticated dithering algorithms).
 
+On Windows, if there is a palette present (set with SetPalette), it will be used when
+creating the wxBitmap (most useful in 8-bit display mode). On other platforms,
+the palette is currently ignored.
+
+\membersection{wxImage::Copy}\label{wximagecopy}
+
+\constfunc{wxImage}{Copy}{\void}
+
+Returns an identical copy of the image.
+
 \membersection{wxImage::Create}\label{wximagecreate}
 
 \func{bool}{Create}{\param{int}{ width}, \param{int}{ height}}
@@ -269,6 +322,15 @@ Gets the green value of the mask colour.
 
 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 in ConvertToBitmap 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}}
@@ -292,19 +354,58 @@ Gets the width of the image in pixels.
 
 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}
@@ -327,7 +428,7 @@ of a given handler class in an application session.}
 \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 use wxBITMAP\_TYPE\_BMP.
+try to autodetect the format.
 
 \func{bool}{LoadFile}{\param{wxInputStream\&}{ stream}, \param{long}{ type}}
 
@@ -337,11 +438,9 @@ 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:
 
@@ -349,17 +448,20 @@ The meaning of {\it stream} data is determined by the {\it type} parameter.}
 \begin{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\_TIF}}{Load a TIFF 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.}
-\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\_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.
+
 \wxheading{Return value}
 
 TRUE if the operation succeeded, FALSE otherwise.
@@ -378,6 +480,13 @@ 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}
 
@@ -418,21 +527,19 @@ 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{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 three types can be used:
 
 \twocolwidtha{5cm}%
 \begin{twocollist}
-\twocolitem{{\bf wxBITMAP\_TYPE\_PNG}}{Save a PNG image file.}
 \twocolitem{{\bf wxBITMAP\_TYPE\_JPEG}}{Save a JPEG image file.}
-\twocolitem{{\bf wxBITMAP\_TYPE\_PCX}}{Save a PCX 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).}
+\end{twocollist}}
 
 \docparam{mimetype}{MIME type.}
 
@@ -458,6 +565,20 @@ 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},
@@ -478,6 +599,25 @@ Returns the (modified) image itself.
 
 \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}}
@@ -487,7 +627,7 @@ 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 port uses this function internally
-to scale bitmaps when using mapping mode in wxDC. 
+to scale bitmaps when using mapping modes in wxDC. 
 
 Example:
 
@@ -532,9 +672,33 @@ Specifies whether there is a mask or not. The area of the mask is determined by
 
 Sets the mask colour for this image (and tells the image to use the mask).
 
+\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 in ConvertToBitmap (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
@@ -614,7 +778,7 @@ created by IJG.)
 
 \wxheading{See also}
 
-\helpref{wxImage}{wximage}
+\helpref{wxImage}{wximage}, 
 \helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}
 
 \latexignore{\rtfignore{\wxheading{Members}}}
@@ -652,7 +816,7 @@ 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 file.}
+\docparam{stream}{Opened input stream for reading image data. Currently, the stream must support seeking.}
 
 \wxheading{Return value}
 
@@ -682,7 +846,7 @@ indicates which image to read from the stream.
 
 \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.}
 
@@ -694,8 +858,8 @@ TRUE if the operation succeeded, FALSE otherwise.
 
 \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}
@@ -708,7 +872,7 @@ Saves a image in the output stream.
 
 \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}
 
@@ -716,8 +880,8 @@ TRUE if the operation succeeded, FALSE otherwise.
 
 \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}
@@ -740,24 +904,23 @@ Sets the handler extension.
 
 \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.}