e3c10211e4
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@8499 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
50 lines
2.2 KiB
TeX
50 lines
2.2 KiB
TeX
\section{\class{wxQuantize}}\label{wxquantize}
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Performs quantization, or colour reduction, on a wxImage.
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Functions in this class are static and so a wxQuantize object need not be created.
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\wxheading{Derived from}
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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<wx/quantize.h>
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxQuantize::wxQuantize}\label{wxquantizewxquantize}
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\func{}{wxQuantize}{\void}
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Constructor. You do not need to construct a wxQuantize object since its functions are static.
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\membersection{wxQuantize::Quantize}\label{wxquantizequantize}
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\func{bool}{Quantize}{\param{const wxImage\& }{src}, \param{wxImage\& }{dest}, \param{wxPalette** }{pPalette}, \param{int }{desiredNoColours = 236}, \param{unsigned char** }{eightBitData = 0}, \param{int }{flags = wxQUANTIZE\_INCLUDE\_WINDOWS\_COLOURS|wxQUANTIZE\_FILL\_DESTINATION\_IMAGE|wxQUANTIZE\_RETURN\_8BIT\_DATA}}
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Reduce the colours in the source image and put the result into the
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destination image. Both images may be the same, to overwrite the source image.
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Specify an optional palette pointer to receive the resulting palette.
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This palette may be passed to ConvertImageToBitmap, for example.
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If you pass a palette pointer, you must free the palette yourself.
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\func{bool}{Quantize}{\param{const wxImage\& }{src}, \param{wxImage\& }{dest}, \param{int }{desiredNoColours = 236}, \param{unsigned char** }{eightBitData = 0}, \param{int }{flags = wxQUANTIZE\_INCLUDE\_WINDOWS\_COLOURS|wxQUANTIZE\_FILL\_DESTINATION\_IMAGE|wxQUANTIZE\_RETURN\_8BIT\_DATA}}
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This version sets a palette in the destination image so you don't
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have to manage it yourself.
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\membersection{wxQuantize::DoQuantize}\label{wxquantizedoquantize}
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\func{void}{DoQuantize}{\param{unsigned }{w}, \param{unsigned }{h}, \param{unsigned char** }{in\_rows}, \param{unsigned char** }{out\_rows}, \param{unsigned char* }{palette}, \param{int }{desiredNoColours}}
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Converts input bitmap(s) into 8bit representation with custom palette.
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in\_rows and out\_rows are arrays [0..h-1] of pointer to rows
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(in\_rows contains w * 3 bytes per row, out\_rows w bytes per row).
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Fills out\_rows with indexes into palette (which is also stored into palette variable).
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