76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/quantize.h
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// Purpose: wxQuantizer class
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// Author: Julian Smart
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// Modified by:
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// Created: 22/6/2000
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// Copyright: (c) Julian Smart
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// Licence:
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_QUANTIZE_H_
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#define _WX_QUANTIZE_H_
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#include "wx/object.h"
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/*
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* From jquant2.c
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*
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* Copyright (C) 1991-1996, Thomas G. Lane.
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* This file is part of the Independent JPEG Group's software.
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* For conditions of distribution and use, see the accompanying README file.
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*/
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class WXDLLIMPEXP_FWD_CORE wxImage;
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class WXDLLIMPEXP_FWD_CORE wxPalette;
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/*
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* wxQuantize
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* Based on the JPEG quantization code. Reduces the number of colours in a wxImage.
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*/
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#define wxQUANTIZE_INCLUDE_WINDOWS_COLOURS 0x01
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#define wxQUANTIZE_RETURN_8BIT_DATA 0x02
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#define wxQUANTIZE_FILL_DESTINATION_IMAGE 0x04
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class WXDLLIMPEXP_CORE wxQuantize: public wxObject
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{
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public:
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DECLARE_DYNAMIC_CLASS(wxQuantize)
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//// Constructor
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wxQuantize() {}
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virtual ~wxQuantize() {}
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//// Operations
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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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static bool Quantize(const wxImage& src, wxImage& dest, wxPalette** pPalette, int desiredNoColours = 236,
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unsigned char** eightBitData = 0, 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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static bool Quantize(const wxImage& src, wxImage& dest, int desiredNoColours = 236,
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unsigned char** eightBitData = 0, int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS|wxQUANTIZE_FILL_DESTINATION_IMAGE|wxQUANTIZE_RETURN_8BIT_DATA);
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//// Helpers
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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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static void DoQuantize(unsigned w, unsigned h, unsigned char **in_rows, unsigned char **out_rows, unsigned char *palette, int desiredNoColours);
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};
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#endif
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// _WX_QUANTIZE_H_
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