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

diff --git a/docs/latex/wx/bitmap.tex b/docs/latex/wx/bitmap.tex
index f847a82bf030eb809bc021d3f97776bf9576b732..1e7feb5b168b4d1b34969a95a38fdab088f88c33 100644 (file)
--- a/docs/latex/wx/bitmap.tex
+++ b/docs/latex/wx/bitmap.tex
@@ -10,9 +10,23 @@ either monochrome or colour.
 \helpref{wxGDIObject}{wxgdiobject}\\
 \helpref{wxObject}{wxobject}
 
 \helpref{wxGDIObject}{wxgdiobject}\\
 \helpref{wxObject}{wxobject}
 

+\wxheading{Include file}
+
+<wx/bitmap.h>
+
+\wxheading{Predefined objects}
+
+Objects:
+
+{\bf wxNullBitmap}
+

 \wxheading{See also}
 
 \wxheading{See also}
 

-\helpref{wxBitmap overview}{wxbitmapoverview}, \helpref{wxDC::Blit}{wxdcblit}, \helpref{wxIcon}{wxicon}, \helpref{wxCursor}{wxcursor}, \helpref{wxMemoryDC}{wxmemorydc}
+\helpref{wxBitmap overview}{wxbitmapoverview},
+\helpref{supported bitmap file formats}{supportedbitmapformats},
+\helpref{wxDC::Blit}{wxdcblit},
+\helpref{wxIcon}{wxicon}, \helpref{wxCursor}{wxcursor}, \helpref{wxBitmap}{wxbitmap},
+\helpref{wxMemoryDC}{wxmemorydc}

 
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 


@@ -28,16 +42,29 @@ Copy constructor.
 
 \func{}{wxBitmap}{\param{void*}{ data}, \param{int}{ type}, \param{int}{ width}, \param{int}{ height}, \param{int}{ depth = -1}}
 
 
 \func{}{wxBitmap}{\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.
+Creates a bitmap from the given data which is interpreted in platform-dependent
+manner.

 
 \func{}{wxBitmap}{\param{const char}{ bits[]}, \param{int}{ width}, \param{int}{ height}\\
   \param{int}{ depth = 1}}
 
 Creates a bitmap from an array of bits.
 
 
 \func{}{wxBitmap}{\param{const char}{ bits[]}, \param{int}{ width}, \param{int}{ height}\\
   \param{int}{ depth = 1}}
 
 Creates a bitmap from an array of bits.
 

+You should only use this function for monochrome bitmaps ({\it depth} 1) in
+portable programs: in this case the {\it bits} parameter should contain an XBM
+image.
+
+For other bit depths, the behaviour is platform dependent: under Windows, the
+data is passed without any changes to the underlying {\tt CreateBitmap()} API.
+Under other platforms, only monochrome bitmaps may be created using this
+constructor and \helpref{wxImage}{wximage} should be used for creating colour
+bitmaps from static data.
+

 \func{}{wxBitmap}{\param{int}{ width}, \param{int}{ height}, \param{int}{ depth = -1}}
 
 \func{}{wxBitmap}{\param{int}{ width}, \param{int}{ height}, \param{int}{ depth = -1}}
 

-Creates a new bitmap.
+Creates a new bitmap. A depth of -1 indicates the depth of the current screen
+or visual. Some platforms only support 1 for monochrome and -1 for the current
+colour setting.

 
 \func{}{wxBitmap}{\param{const char**}{ bits}}
 
 
 \func{}{wxBitmap}{\param{const char**}{ bits}}
 


@@ -47,6 +74,23 @@ Creates a bitmap from XPM data.
 
 Loads a bitmap from a file or resource.
 
 
 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.}
 \wxheading{Parameters}
 
 \docparam{bits}{Specifies an array of pixel values.}


@@ -65,17 +109,24 @@ Its meaning is determined by the {\it type} parameter.}
 
 \twocolwidtha{5cm}
 \begin{twocollist}
 
 \twocolwidtha{5cm}
 \begin{twocollist}

-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_BMP}}}{Load a Windows bitmap file.}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_BMP\_RESOURCE}}}{Load a Windows bitmap from the resource database.}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_GIF}}}{Load a GIF bitmap file.}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_XBM}}}{Load an X bitmap file.}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_XPM}}}{Load an XPM bitmap file.}
-\twocolitem{{\bf \indexit{wxBITMAP\_TYPE\_RESOURCE}}}{Load a Windows resource name.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_BMP}}{Load a Windows bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_BMP\_RESOURCE}}{Load a Windows bitmap from the resource database.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_GIF}}{Load a GIF bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_XBM}}{Load an X bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_XPM}}{Load an XPM bitmap file.}
+\twocolitem{\indexit{wxBITMAP\_TYPE\_RESOURCE}}{Load a Windows resource name.}

 \end{twocollist}
 
 The validity of these flags depends on the platform and wxWindows configuration.
 \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, BMP\_RESOURCE,
-XPM\_DATA, and XPM. Under X, the available formats are BMP, GIF, XBM, and XPM.}
+If all possible wxWindows 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,
+and wxBITMAP\_TYPE\_PNM. Of course, you must have wxImage handlers loaded. }
+
+\docparam{img}{Platform-independent wxImage object.}

 
 \wxheading{Remarks}
 
 
 \wxheading{Remarks}
 


@@ -113,12 +164,35 @@ The eighth form constructs a bitmap from a file or resource. {\it name} can refe
 to a resource name under MS Windows, or a filename under MS Windows and X.
 
 Under Windows, {\it type} defaults to wxBITMAP\_TYPE\_BMP\_RESOURCE.
 to a resource name under MS Windows, or a filename under MS Windows and X.
 
 Under Windows, {\it type} defaults to wxBITMAP\_TYPE\_BMP\_RESOURCE.

-Under X, {\it type} defaults to wxBITMAP\_TYPE\_XBM.
+Under X, {\it type} defaults to wxBITMAP\_TYPE\_XPM.

 
 \wxheading{See also}
 
 \helpref{wxBitmap::LoadFile}{wxbitmaploadfile}
 
 
 \wxheading{See also}
 
 \helpref{wxBitmap::LoadFile}{wxbitmaploadfile}
 

+\pythonnote{Constructors supported by wxPython are:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf wxBitmap(name, flag)}}{Loads a bitmap from a file}
+\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}}
+}
+
+\perlnote{Constructors supported by wxPerl are:\par
+\begin{itemize}
+\item{Wx::Bitmap->new( width, height, depth = -1 )}
+\item{Wx::Bitmap->new( name, type )}
+\item{Wx::Bitmap->new( icon )}
+\end{itemize}
+}
+

 \membersection{wxBitmap::\destruct{wxBitmap}}
 
 \func{}{\destruct{wxBitmap}}{\void}
 \membersection{wxBitmap::\destruct{wxBitmap}}
 
 \func{}{\destruct{wxBitmap}}{\void}


@@ -154,7 +228,15 @@ Deletes all bitmap handlers.
 
 This function is called by wxWindows on exit.
 
 
 This function is called by wxWindows on exit.
 

-\membersection{wxBitmap::Create}
+\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::Create}\label{wxbitmapcreate}

 
 \func{virtual bool}{Create}{\param{int}{ width}, \param{int}{ height}, \param{int}{ depth = -1}}
 
 
 \func{virtual bool}{Create}{\param{int}{ width}, \param{int}{ height}, \param{int}{ depth = -1}}
 


@@ -274,6 +356,13 @@ Gets the width of the bitmap in pixels.
 
 \helpref{wxBitmap::GetHeight}{wxbitmapgetheight}
 
 
 \helpref{wxBitmap::GetHeight}{wxbitmapgetheight}
 

+\membersection{wxBitmap::GetSubBitmap}\label{wxbitmapgetsubbitmap}
+
+\constfunc{wxBitmap}{GetSubBitmap}{\param{const wxRect\&}{rect}}
+
+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}
 \membersection{wxBitmap::InitStandardHandlers}
 
 \func{static void}{InitStandardHandlers}{\void}


@@ -322,7 +411,11 @@ The meaning of {\it name} is determined by the {\it type} parameter.}
 \twocolitem{{\bf wxBITMAP\_TYPE\_XPM}}{Load an XPM bitmap file.}
 \end{twocollist}
 
 \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 wxWindows configuration.
+
+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}
 
 
 \wxheading{Return value}
 


@@ -381,10 +474,15 @@ Saves a bitmap in the named file.
 \twocolitem{{\bf wxBITMAP\_TYPE\_XPM}}{Save an XPM bitmap file.}
 \end{twocollist}
 
 \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 wxWindows configuration.
+
+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.) }

 
 

-\docparam{palette}{An optional palette used for saving the bitmap. TODO: this parameter should
-probably be eliminated; instead the app should set the palette before saving.}
+\docparam{palette}{An optional palette used for saving the bitmap.}
+% TODO: this parameter should
+%probably be eliminated; instead the app should set the palette before saving.

 
 \wxheading{Return value}
 
 
 \wxheading{Return value}
 


@@ -432,32 +530,27 @@ The bitmap object owns the mask once this has been called.
 
 \helpref{wxBitmap::GetMask}{wxbitmapgetmask}, \helpref{wxMask}{wxmask}
 
 
 \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}
 
 
 \membersection{wxBitmap::SetPalette}\label{wxbitmapsetpalette}
 

-\func{void}{SetPalette}{\param{wxPalette* }{palette}}
+\func{void}{SetPalette}{\param{const wxPalette\& }{palette}}

 
 

-Sets the associated palette: it will be deleted in the wxBitmap
-destructor, so if you do not wish it to be deleted automatically,
-reset the palette to NULL before the bitmap is deleted.
+Sets the associated palette.

 
 \wxheading{Parameters}
 
 \docparam{palette}{The palette to set.}
 
 
 \wxheading{Parameters}
 
 \docparam{palette}{The palette to set.}
 

-\wxheading{Remarks}
-
-The bitmap object owns the palette once this has been called.
-

 \wxheading{See also}
 
 \helpref{wxPalette}{wxpalette}
 \wxheading{See also}
 
 \helpref{wxPalette}{wxpalette}


@@ -533,6 +626,10 @@ application initialisation.
 
 \helpref{wxObject}{wxobject}
 
 
 \helpref{wxObject}{wxobject}
 

+\wxheading{Include files}
+
+<wx/bitmap.h>
+

 \wxheading{See also}
 
 \helpref{wxBitmap}{wxbitmap}, \helpref{wxIcon}{wxicon}, \helpref{wxCursor}{wxcursor}
 \wxheading{See also}
 
 \helpref{wxBitmap}{wxbitmap}, \helpref{wxIcon}{wxicon}, \helpref{wxCursor}{wxcursor}


@@ -635,8 +732,7 @@ Saves a bitmap in the named file.
 
 \docparam{type}{See \helpref{wxBitmap::wxBitmap}{wxbitmapconstr} for values this can take.}
 
 
 \docparam{type}{See \helpref{wxBitmap::wxBitmap}{wxbitmapconstr} for values this can take.}
 

-\docparam{palette}{An optional palette used for saving the bitmap. TODO: this parameter should
-probably be eliminated; instead the app should set the palette before saving.}
+\docparam{palette}{An optional palette used for saving the bitmap.}

 
 \wxheading{Return value}
 
 
 \wxheading{Return value}