Added project files for STC; fixed wxStringList memory leaks; small doc changes;

[wxWidgets.git] / docs / latex / wx / image.tex

diff --git a/docs/latex/wx/image.tex b/docs/latex/wx/image.tex
index 87ead917f65cfdb27c79b49f478e33a54a3c668c..68e11bd14c91d1b9b05857f9c2822b5e2fc4e653 100644 (file)
--- 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.
 
 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 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{Derived from}
 
 \helpref{wxObject}{wxobject}


@@ -24,7 +49,7 @@ creation of a \helpref{wxMask}{wxmask} object associated to the bitmap object.
 
 \wxheading{See also}
 
 
 \wxheading{See also}
 

-\helpref{wxBitmap}{wxbitmap}
+\helpref{wxBitmap}{wxbitmap}, 

 \helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 \helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}
 
 \latexignore{\rtfignore{\wxheading{Members}}}


@@ -49,13 +74,13 @@ and forth without loss in that respect.
 
 Creates an image with the given width and height.
 
 
 Creates an image with the given width and height.
 

-\func{}{wxImage}{\param{const wxString\& }{name}, \param{long}{ type = wxBITMAP\_TYPE\_PNG}}
+\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{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}}
 
 
 \func{}{wxImage}{\param{wxInputStream\& }{stream}, \param{const wxString\&}{ mimetype}}
 


@@ -67,31 +92,33 @@ Loads an image from an input stream.
 
 \docparam{height}{Specifies the height 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}{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.}
 
 \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\_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.}
 \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')}
 
 
 \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}
 
 
 \wxheading{See also}
 


@@ -297,7 +324,7 @@ Returns TRUE if there is a mask active, FALSE otherwise.
 \func{static void}{InitStandardHandlers}{\void}
 
 Internal use only. Adds standard image format handlers. It only install BMP
 \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.
 
 This function is called by wxWindows on startup, and shouldn't be called by
 the user.


@@ -327,7 +354,7 @@ 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
 \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}}
 
 
 \func{bool}{LoadFile}{\param{wxInputStream\&}{ stream}, \param{long}{ type}}
 


@@ -337,11 +364,9 @@ Loads an image from an input stream.
 
 \wxheading{Parameters}
 
 
 \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:
 
 
 \docparam{type}{One of the following values:
 


@@ -349,17 +374,20 @@ 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.}
 \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.}
 \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')}
 
 
 \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.
 \wxheading{Return value}
 
 TRUE if the operation succeeded, FALSE otherwise.


@@ -418,21 +446,20 @@ Saves a image in the given stream.
 
 \wxheading{Parameters}
 
 
 \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}
 
 \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\_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).}
+\twocolitem{{\bf wxBITMAP\_TYPE\_TIF}}{Save a TIFF image file.}
+\end{twocollist}}

 
 \docparam{mimetype}{MIME type.}
 
 
 \docparam{mimetype}{MIME type.}
 


@@ -478,6 +505,18 @@ Returns the (modified) image itself.
 
 \helpref{Scale}{wximagescale}
 
 
 \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::Scale}\label{wximagescale}
 
 \constfunc{wxImage}{Scale}{\param{int}{ width}, \param{int}{ height}}
 \membersection{wxImage::Scale}\label{wximagescale}
 
 \constfunc{wxImage}{Scale}{\param{int}{ width}, \param{int}{ height}}


@@ -652,7 +691,7 @@ 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.
 
 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}
 
 
 \wxheading{Return value}
 


@@ -682,7 +721,7 @@ indicates which image to read from the stream.
 
 \docparam{image}{The image object which is to be affected by this operation.}
 
 
 \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.}
 
 
 \docparam{verbose}{If set to TRUE, errors reported by the image handler will produce wxLogMessages.}
 


@@ -708,7 +747,7 @@ Saves a image in the output stream.
 
 \docparam{image}{The image object which is to be affected by this operation.}
 
 
 \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{Return value}