X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f690fb046b8a685f8ef35657c2f305ca0e1481a0..801d040762d0d875126935b79d660d4e2fe1b177:/docs/latex/wx/bitmap.tex diff --git a/docs/latex/wx/bitmap.tex b/docs/latex/wx/bitmap.tex index 4e5f5c4575..3fde13a915 100644 --- a/docs/latex/wx/bitmap.tex +++ b/docs/latex/wx/bitmap.tex @@ -74,6 +74,23 @@ Creates a bitmap from XPM data. Loads a bitmap from a file or resource. +\func{}{wxBitmap}{\param{const wxImage\&}{ img}, \param{int}{ depth = -1}} + +Creates bitmap object from the image. 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 provided colour depth (or that of the +current system if depth is -1) which entails that a colour reduction has +to take place. + +When in 8-bit mode (PseudoColour mode), the GTK port will use a color cube created +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. + \wxheading{Parameters} \docparam{bits}{Specifies an array of pixel values.} @@ -100,15 +117,17 @@ Its meaning is determined by the {\it type} parameter.} \twocolitem{\indexit{wxBITMAP\_TYPE\_RESOURCE}}{Load a Windows resource name.} \end{twocollist} -The validity of these flags depends on the platform and wxWindows configuration. -If all possible wxWindows settings are used, the Windows platform supports BMP file, BMP resource, +The validity of these flags depends on the platform and wxWidgets configuration. +If all possible wxWidgets settings are used, the Windows platform supports BMP file, BMP resource, XPM data, and XPM. Under wxGTK, the available formats are BMP file, XPM data, XPM file, and PNG file. Under wxMotif, the available formats are XBM data, XBM file, XPM data, XPM file. -In addition, wxBitmap can read all formats that \helpref{wxImage}{wximage} can, which currently include -wxBITMAP\_TYPE\_JPEG, wxBITMAP\_TYPE\_TIF, wxBITMAP\_TYPE\_PNG, wxBITMAP\_TYPE\_GIF, wxBITMAP\_TYPE\_PCX, +In addition, wxBitmap can read all formats that \helpref{wxImage}{wximage} can, which currently include +wxBITMAP\_TYPE\_JPEG, wxBITMAP\_TYPE\_TIF, wxBITMAP\_TYPE\_PNG, wxBITMAP\_TYPE\_GIF, wxBITMAP\_TYPE\_PCX, and wxBITMAP\_TYPE\_PNM. Of course, you must have wxImage handlers loaded. } +\docparam{img}{Platform-independent wxImage object.} + \wxheading{Remarks} The first form constructs a bitmap object with no data; an assignment or another member function such as Create @@ -126,7 +145,7 @@ X and Windows. The sixth form constructs a new bitmap. -The seventh form constructs a bitmap from pixmap (XPM) data, if wxWindows has been configured +The seventh form constructs a bitmap from pixmap (XPM) data, if wxWidgets has been configured to incorporate this feature. To use this constructor, you must first include an XPM file. For @@ -154,13 +173,15 @@ Under X, {\it type} defaults to wxBITMAP\_TYPE\_XPM. \pythonnote{Constructors supported by wxPython are:\par \indented{2cm}{\begin{twocollist} \twocolitem{{\bf wxBitmap(name, flag)}}{Loads a bitmap from a file} -\twocolitem{{\bf wxBitmapFromData(data, type, width, height, depth=1)}}{Creates -a bitmap from the given data, which can be of arbitrary type.} -\twocolitem{{\bf wxNoRefBitmap(name, flag)}}{This one won't own the -reference, so Python won't call the destructor, this is good for toolbars -and such where the parent will manage the bitmap.} \twocolitem{{\bf wxEmptyBitmap(width, height, depth = -1)}}{Creates an empty bitmap with the given specifications} +\twocolitem{{\bf wxBitmapFromXPMData(listOfStrings)}}{Create a bitmap +from a Python list of strings whose contents are XPM data.} +\twocolitem{{\bf wxBitmapFromBits(bits, width, height, +depth=-1)}}{Create a bitmap from an array of bits contained in a +string.} +\twocolitem{{\bf wxBitmapFromImage(image, depth=-1)}}{Convert a +wxImage to a wxBitmap.} \end{twocollist}} } @@ -169,6 +190,8 @@ empty bitmap with the given specifications} \item{Wx::Bitmap->new( width, height, depth = -1 )} \item{Wx::Bitmap->new( name, type )} \item{Wx::Bitmap->new( icon )} +\item{Wx::Bitmap->newFromBits( bits, width, height, depth = 1 )} +\item{Wx::Bitmap->newFromXPM( data )} \end{itemize} } @@ -182,7 +205,7 @@ destroyed at this point - only when the reference count is zero will the data be deleted. If the application omits to delete the bitmap explicitly, the bitmap will be -destroyed automatically by wxWindows when the application exits. +destroyed automatically by wxWidgets when the application exits. Do not delete a bitmap that is selected into a memory device context. @@ -205,7 +228,21 @@ of a given handler class in an application session.} Deletes all bitmap handlers. -This function is called by wxWindows on exit. +This function is called by wxWidgets on exit. + +\membersection{wxBitmap::ConvertToImage}\label{wxbitmapconverttoimage} + +\func{wxImage}{ConvertToImage}{\void} + +Creates 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. + +\membersection{wxBitmap::CopyFromIcon}\label{wxbitmapcopyfromicon} + +\func{bool}{CopyFromIcon}{\param{const wxIcon\&}{ icon}} + +Creates the bitmap from an icon. \membersection{wxBitmap::Create}\label{wxbitmapcreate} @@ -233,7 +270,7 @@ of possible values.} \wxheading{Return value} -TRUE if the call succeeded, FALSE otherwise. +true if the call succeeded, false otherwise. \wxheading{Remarks} @@ -331,17 +368,17 @@ Gets the width of the bitmap in pixels. \constfunc{wxBitmap}{GetSubBitmap}{\param{const wxRect\&}{rect}} -Returns a sub bitmap of the current one as long as the rect belongs entirely to +Returns a sub bitmap of the current one as long as the rect belongs entirely to the bitmap. This function preserves bit depth and mask information. \membersection{wxBitmap::InitStandardHandlers} \func{static void}{InitStandardHandlers}{\void} -Adds the standard bitmap format handlers, which, depending on wxWindows +Adds the standard bitmap format handlers, which, depending on wxWidgets configuration, can be handlers for Windows bitmap, Windows bitmap resource, and XPM. -This function is called by wxWindows on startup. +This function is called by wxWidgets on startup. \wxheading{See also} @@ -382,15 +419,15 @@ The meaning of {\it name} is determined by the {\it type} parameter.} \twocolitem{{\bf wxBITMAP\_TYPE\_XPM}}{Load an XPM bitmap file.} \end{twocollist} -The validity of these flags depends on the platform and wxWindows configuration. +The validity of these flags depends on the platform and wxWidgets configuration. -In addition, wxBitmap can read all formats that \helpref{wxImage}{wximage} can +In addition, wxBitmap can read all formats that \helpref{wxImage}{wximage} can (wxBITMAP\_TYPE\_JPEG, wxBITMAP\_TYPE\_PNG, wxBITMAP\_TYPE\_GIF, wxBITMAP\_TYPE\_PCX, wxBITMAP\_TYPE\_PNM). (Of course you must have wxImage handlers loaded.) } \wxheading{Return value} -TRUE if the operation succeeded, FALSE otherwise. +true if the operation succeeded, false otherwise. \wxheading{Remarks} @@ -406,7 +443,7 @@ if one has been created by using the \helpref{GetPalette}{wxbitmapgetpalette} me \constfunc{bool}{Ok}{\void} -Returns TRUE if bitmap data is present. +Returns true if bitmap data is present. \membersection{wxBitmap::RemoveHandler} @@ -419,7 +456,7 @@ is not deleted. \wxheading{Return value} -TRUE if the handler was found and removed, FALSE otherwise. +true if the handler was found and removed, false otherwise. \wxheading{See also} @@ -445,9 +482,9 @@ Saves a bitmap in the named file. \twocolitem{{\bf wxBITMAP\_TYPE\_XPM}}{Save an XPM bitmap file.} \end{twocollist} -The validity of these flags depends on the platform and wxWindows configuration. +The validity of these flags depends on the platform and wxWidgets configuration. -In addition, wxBitmap can save all formats that \helpref{wxImage}{wximage} can +In addition, wxBitmap can save all formats that \helpref{wxImage}{wximage} can (wxBITMAP\_TYPE\_JPEG, wxBITMAP\_TYPE\_PNG). (Of course you must have wxImage handlers loaded.) } @@ -457,11 +494,11 @@ In addition, wxBitmap can save all formats that \helpref{wxImage}{wximage} can \wxheading{Return value} -TRUE if the operation succeeded, FALSE otherwise. +true if the operation succeeded, false otherwise. \wxheading{Remarks} -Depending on how wxWindows has been configured, not all formats may be available. +Depending on how wxWidgets has been configured, not all formats may be available. \wxheading{See also} @@ -501,15 +538,16 @@ The bitmap object owns the mask once this has been called. \helpref{wxBitmap::GetMask}{wxbitmapgetmask}, \helpref{wxMask}{wxmask} -\membersection{wxBitmap::SetOk} - -\func{void}{SetOk}{\param{int }{isOk}} - -Sets the validity member (does not affect the bitmap data). - -\wxheading{Parameters} - -\docparam{isOk}{Validity flag.} +%% VZ: this function is an implementation detail and shouldn't be documented +%%\membersection{wxBitmap::SetOk} +%% +%%\func{void}{SetOk}{\param{int }{isOk}} +%% +%%Sets the validity member (does not affect the bitmap data). +%% +%%\wxheading{Parameters} +%% +%%\docparam{isOk}{Validity flag.} \membersection{wxBitmap::SetPalette}\label{wxbitmapsetpalette} @@ -564,7 +602,7 @@ equal (a fast test). \wxheading{Return value} -Returns TRUE if the bitmaps were effectively equal, FALSE otherwise. +Returns true if the bitmaps were effectively equal, false otherwise. \membersection{wxBitmap::operator $!=$} @@ -579,169 +617,5 @@ unequal (a fast test). \wxheading{Return value} -Returns TRUE if the bitmaps were unequal, FALSE otherwise. - -\section{\class{wxBitmapHandler}}\label{wxbitmaphandler} - -\overview{Overview}{wxbitmapoverview} - -This is the base class for implementing bitmap file loading/saving, and bitmap creation from data. -It is used within wxBitmap and is not normally seen by the application. - -If you wish to extend the capabilities of wxBitmap, derive a class from wxBitmapHandler -and add the handler using \helpref{wxBitmap::AddHandler}{wxbitmapaddhandler} in your -application initialisation. - -\wxheading{Derived from} - -\helpref{wxObject}{wxobject} - -\wxheading{Include files} - - - -\wxheading{See also} - -\helpref{wxBitmap}{wxbitmap}, \helpref{wxIcon}{wxicon}, \helpref{wxCursor}{wxcursor} - -\latexignore{\rtfignore{\wxheading{Members}}} - -\membersection{wxBitmapHandler::wxBitmapHandler}\label{wxbitmaphandlerconstr} - -\func{}{wxBitmapHandler}{\void} - -Default constructor. In your own default constructor, initialise the members -m\_name, m\_extension and m\_type. - -\membersection{wxBitmapHandler::\destruct{wxBitmapHandler}} - -\func{}{\destruct{wxBitmapHandler}}{\void} - -Destroys the wxBitmapHandler object. - -\membersection{wxBitmapHandler::Create} - -\func{virtual bool}{Create}{\param{wxBitmap* }{bitmap}, \param{void*}{ data}, \param{int}{ type}, \param{int}{ width}, \param{int}{ height}, \param{int}{ depth = -1}} - -Creates a bitmap from the given data, which can be of arbitrary type. The wxBitmap object {\it bitmap} is -manipulated by this function. - -\wxheading{Parameters} - -\docparam{bitmap}{The wxBitmap object.} - -\docparam{width}{The width of the bitmap in pixels.} - -\docparam{height}{The height of the bitmap in pixels.} - -\docparam{depth}{The depth of the bitmap in pixels. If this is -1, the screen depth is used.} - -\docparam{data}{Data whose type depends on the value of {\it type}.} - -\docparam{type}{A bitmap type identifier - see \helpref{wxBitmapHandler::wxBitmapHandler}{wxbitmapconstr} for a list -of possible values.} - -\wxheading{Return value} - -TRUE if the call succeeded, FALSE otherwise (the default). - -\membersection{wxBitmapHandler::GetName} - -\constfunc{wxString}{GetName}{\void} - -Gets the name of this handler. - -\membersection{wxBitmapHandler::GetExtension} - -\constfunc{wxString}{GetExtension}{\void} - -Gets the file extension associated with this handler. - -\membersection{wxBitmapHandler::GetType} - -\constfunc{long}{GetType}{\void} - -Gets the bitmap type associated with this handler. - -\membersection{wxBitmapHandler::LoadFile}\label{wxbitmaphandlerloadfile} - -\func{bool}{LoadFile}{\param{wxBitmap* }{bitmap}, \param{const wxString\&}{ name}, \param{long}{ type}} - -Loads a bitmap from a file or resource, putting the resulting data into {\it bitmap}. - -\wxheading{Parameters} - -\docparam{bitmap}{The bitmap 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{type}{See \helpref{wxBitmap::wxBitmap}{wxbitmapconstr} for values this can take.} - -\wxheading{Return value} - -TRUE if the operation succeeded, FALSE otherwise. - -\wxheading{See also} - -\helpref{wxBitmap::LoadFile}{wxbitmaploadfile}\\ -\helpref{wxBitmap::SaveFile}{wxbitmapsavefile}\\ -\helpref{wxBitmapHandler::SaveFile}{wxbitmaphandlersavefile} - -\membersection{wxBitmapHandler::SaveFile}\label{wxbitmaphandlersavefile} - -\func{bool}{SaveFile}{\param{wxBitmap* }{bitmap}, \param{const wxString\& }{name}, \param{int}{ type}, \param{wxPalette* }{palette = NULL}} - -Saves a bitmap in the named file. - -\wxheading{Parameters} - -\docparam{bitmap}{The bitmap 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{type}{See \helpref{wxBitmap::wxBitmap}{wxbitmapconstr} for values this can take.} - -\docparam{palette}{An optional palette used for saving the bitmap.} - -\wxheading{Return value} - -TRUE if the operation succeeded, FALSE otherwise. - -\wxheading{See also} - -\helpref{wxBitmap::LoadFile}{wxbitmaploadfile}\\ -\helpref{wxBitmap::SaveFile}{wxbitmapsavefile}\\ -\helpref{wxBitmapHandler::LoadFile}{wxbitmaphandlerloadfile} - -\membersection{wxBitmapHandler::SetName} - -\func{void}{SetName}{\param{const wxString\& }{name}} - -Sets the handler name. - -\wxheading{Parameters} - -\docparam{name}{Handler name.} - -\membersection{wxBitmapHandler::SetExtension} - -\func{void}{SetExtension}{\param{const wxString\& }{extension}} - -Sets the handler extension. - -\wxheading{Parameters} - -\docparam{extension}{Handler extension.} - -\membersection{wxBitmapHandler::SetType} - -\func{void}{SetType}{\param{long }{type}} - -Sets the handler type. - -\wxheading{Parameters} - -\docparam{name}{Handler type.} - +Returns true if the bitmaps were unequal, false otherwise.