Minor doc updates.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5123 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
parent
be25e48093
commit
7468b994be
@ -6,9 +6,13 @@ can be loaded from a file in a variety of formats, and is extensible to new form
|
||||
via image format handlers. Functions are available to set and get image bits, so
|
||||
it can be used for basic image manipulation.
|
||||
|
||||
A wxImage cannot (currently) be drawn directly to a wxDC. Instead, a platform-specific
|
||||
wxBitmap object must be created from it, and that bitmap drawn on the wxDC, using
|
||||
wxDC::DrawBitmap.
|
||||
A wxImage cannot (currently) be drawn directly to a \helpref{wxDC}{wxdc}. Instead,
|
||||
a platform-specific \helpref{wxBitmap}{wxbitmap} object must be created from it using
|
||||
the \helpref{ConvertToBitmap}{wximageconverttobitmap} function. This bitmap can then
|
||||
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{Derived from}
|
||||
|
||||
@ -142,9 +146,12 @@ This function is called by wxWindows on exit.
|
||||
Converts the image to a platform-specific bitmap object. 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 colour depth of the current system which entails
|
||||
that a (crude) colour reduction has to take place. When in 8-bit mode, this
|
||||
routine will use a color cube created on program start-up to look up colors.
|
||||
Still, the image quality won't be perfect for photo images.
|
||||
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).
|
||||
|
||||
\membersection{wxImage::Create}\label{wximagecreate}
|
||||
|
||||
@ -264,7 +271,7 @@ Gets the red value of the mask colour.
|
||||
|
||||
\membersection{wxImage::GetSubImage}\label{wximagegetsubimage}
|
||||
|
||||
\constfunc{wxImage}{GetSubImage}{\param{const wxRect\&}{rect}}
|
||||
\constfunc{wxImage}{GetSubImage}{\param{const wxRect\&}{ rect}}
|
||||
|
||||
Returns a sub image of the current one as long as the rect belongs entirely to
|
||||
the image.
|
||||
@ -342,6 +349,7 @@ 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.}
|
||||
@ -414,12 +422,13 @@ Saves a image in the given stream.
|
||||
|
||||
\docparam{stream}{An output stream. The meaning of {\it stream} is determined by the {\it type} parameter.}
|
||||
|
||||
\docparam{type}{Currently two types can be used:
|
||||
\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
|
||||
@ -449,6 +458,13 @@ mimetype to the named file}
|
||||
\end{twocollist}}
|
||||
}
|
||||
|
||||
\membersection{wxImage::Replace}\label{wximagereplace}
|
||||
|
||||
\func{void}{Replace}{\param{unsigned char}{ r1}, \param{unsigned char}{ g1}, \param{unsigned char}{ b1},
|
||||
\param{unsigned char}{ r2}, \param{unsigned char}{ g2}, \param{unsigned char}{ b2}}
|
||||
|
||||
Replaces the colour specified by {\it r1,g1,b1} by the colour {\it r2,g2,b2}.
|
||||
|
||||
\membersection{wxImage::Rescale}\label{wximagerescale}
|
||||
|
||||
\func{wxImage \&}{Rescale}{\param{int}{ width}, \param{int}{ height}}
|
||||
@ -470,7 +486,7 @@ Returns a scaled version of the image. This is also useful for
|
||||
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 post uses this function internally
|
||||
It may be mentioned that the GTK port uses this function internally
|
||||
to scale bitmaps when using mapping mode in wxDC.
|
||||
|
||||
Example:
|
||||
@ -523,7 +539,8 @@ Sets the mask colour for this image (and tells the image to use the mask).
|
||||
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
|
||||
data, but in some cases this might be too slow so that the data will have to
|
||||
be set directly. In that case you have to get that data by calling GetData().
|
||||
be set directly. In that case you will have to get access to the image data
|
||||
using the \helpref{GetData}{wximagegetdata} method.
|
||||
|
||||
\membersection{wxImage::operator $=$}
|
||||
|
||||
|
@ -3,6 +3,9 @@
|
||||
% -----------------------------------------------------------------------------
|
||||
\section{\class{wxStreamBase}}\label{wxstreambase}
|
||||
|
||||
This class is the base class of most stream related classes in wxWindows. It must
|
||||
not be used directly.
|
||||
|
||||
\wxheading{Derived from}
|
||||
|
||||
None
|
||||
@ -43,32 +46,32 @@ Destructor.
|
||||
This function returns the last error.
|
||||
\twocolwidtha{5cm}
|
||||
\begin{twocollist}\itemsep=0pt
|
||||
\twocolitem{{\bf wxStream\_NOERROR}}{No error occured.}
|
||||
\twocolitem{{\bf wxStream\_EOF}}{An End-Of-File occured.}
|
||||
\twocolitem{{\bf wxStream\_WRITE\_ERR}}{A generic error occured on the last write call.}
|
||||
\twocolitem{{\bf wxStream\_READ\_ERR}}{A generic error occured on the last read call.}
|
||||
\twocolitem{{\bf wxSTREAM\_NO\_ERROR}}{No error occured.}
|
||||
\twocolitem{{\bf wxSTREAM\_EOF}}{An End-Of-File occured.}
|
||||
\twocolitem{{\bf wxSTREAM\_WRITE\_ERROR}}{A generic error occured on the last write call.}
|
||||
\twocolitem{{\bf wxSTREAM\_READ\_ERROR}}{A generic error occured on the last read call.}
|
||||
\end{twocollist}
|
||||
|
||||
\membersection{wxStreamBase::OnSysRead}\label{wxstreambaseonsysread}
|
||||
|
||||
\func{size\_t}{OnSysRead}{\param{void*}{ buffer}, \param{size\_t}{ bufsize}}
|
||||
|
||||
Internal function. It is called when the stream buffer needs a buffer of the
|
||||
Internal function. It is called when the stream wants to read data of the
|
||||
specified size. It should return the size that was actually read.
|
||||
|
||||
\membersection{wxStreamBase::OnSysSeek}
|
||||
|
||||
\func{off\_t}{OnSysSeek}{\param{off\_t}{ pos}, \param{wxSeekMode}{ mode}}
|
||||
|
||||
Internal function. It is called when the stream buffer needs to change the
|
||||
current position in the stream. See \helpref{wxStreamBuffer::Seek}{wxstreambufferseek}
|
||||
Internal function. It is called when the stream needs to change the
|
||||
current position.
|
||||
|
||||
\membersection{wxStreamBase::OnSysTell}
|
||||
|
||||
\constfunc{off\_t}{OnSysTell}{\void}
|
||||
|
||||
Internal function. Is is called when the stream buffer needs to know the
|
||||
real position in the stream.
|
||||
Internal function. Is is called when the stream needs to know the
|
||||
real position.
|
||||
|
||||
\membersection{wxStreamBase::OnSysWrite}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user