X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2259e007898a6ffa793e129845e1fa416b42e6d3..8962e1d9383d615ea48979cd76bd53d5aa5b3026:/docs/latex/wx/bitmap.tex

diff --git a/docs/latex/wx/bitmap.tex b/docs/latex/wx/bitmap.tex
index a1e0e2dd30..1e7feb5b16 100644
--- a/docs/latex/wx/bitmap.tex
+++ b/docs/latex/wx/bitmap.tex
@@ -10,7 +10,7 @@ either monochrome or colour.
 \helpref{wxGDIObject}{wxgdiobject}\\
 \helpref{wxObject}{wxobject}
 
-\wxheading{Include files}
+\wxheading{Include file}
 
 <wx/bitmap.h>
 
@@ -42,22 +42,29 @@ Copy constructor.
 
 \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.
-Windows only, I think.
+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. 
+Creates a bitmap from an array of bits.
 
-Note that the bit depth is ignored on GTK+ and Motif. If you want to create a bitmap 
-from something else than a 1-bit data array, use the \helpref{wxImage}{wximage} class.
+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}}
 
-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.
+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}}
 
@@ -67,6 +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.}
@@ -85,18 +109,24 @@ Its meaning is determined by the {\it type} parameter.}
 
 \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.
 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.}
+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}
 
@@ -142,15 +172,27 @@ 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{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
+\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}
@@ -186,7 +228,15 @@ Deletes all bitmap handlers.
 
 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}}
 
@@ -306,6 +356,13 @@ Gets the width of the bitmap in pixels.
 
 \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}
@@ -354,7 +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}
 
-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}
 
@@ -413,7 +474,11 @@ 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 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
@@ -465,32 +530,27 @@ 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}
 
-\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{Remarks}
-
-The bitmap object owns the palette once this has been called.
-
 \wxheading{See also}
 
 \helpref{wxPalette}{wxpalette}