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/////////////////////////////////////////////////////////////////////////////
// Name: wx/quantize.h
// Purpose: wxQuantizer class
// Author: Julian Smart
// Modified by:
// Created: 22/6/2000
// RCS-ID: $Id: quantize.h 52834 2008-03-26 15:06:00Z FM $
// Copyright: (c) Julian Smart
// Licence:
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_QUANTIZE_H_
#define _WX_QUANTIZE_H_
#include "wx/object.h"
/*
* From jquant2.c
*
* Copyright (C) 1991-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*/
class WXDLLIMPEXP_FWD_CORE wxImage;
class WXDLLIMPEXP_FWD_CORE wxPalette;
/*
* wxQuantize
* Based on the JPEG quantization code. Reduces the number of colours in a wxImage.
*/
#define wxQUANTIZE_INCLUDE_WINDOWS_COLOURS 0x01
#define wxQUANTIZE_RETURN_8BIT_DATA 0x02
#define wxQUANTIZE_FILL_DESTINATION_IMAGE 0x04
class WXDLLIMPEXP_CORE wxQuantize: public wxObject
{
public:
DECLARE_DYNAMIC_CLASS(wxQuantize)
//// Constructor
wxQuantize() {}
virtual ~wxQuantize() {}
//// Operations
// Reduce the colours in the source image and put the result into the
// destination image. Both images may be the same, to overwrite the source image.
// Specify an optional palette pointer to receive the resulting palette.
// This palette may be passed to ConvertImageToBitmap, for example.
// If you pass a palette pointer, you must free the palette yourself.
static bool Quantize(const wxImage& src, wxImage& dest, wxPalette** pPalette, int desiredNoColours = 236,
unsigned char** eightBitData = 0, int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS|wxQUANTIZE_FILL_DESTINATION_IMAGE|wxQUANTIZE_RETURN_8BIT_DATA);
// This version sets a palette in the destination image so you don't
// have to manage it yourself.
static bool Quantize(const wxImage& src, wxImage& dest, int desiredNoColours = 236,
unsigned char** eightBitData = 0, int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS|wxQUANTIZE_FILL_DESTINATION_IMAGE|wxQUANTIZE_RETURN_8BIT_DATA);
//// Helpers
// Converts input bitmap(s) into 8bit representation with custom palette
// in_rows and out_rows are arrays [0..h-1] of pointer to rows
// (in_rows contains w * 3 bytes per row, out_rows w bytes per row)
// fills out_rows with indexes into palette (which is also stored into palette variable)
static void DoQuantize(unsigned w, unsigned h, unsigned char **in_rows, unsigned char **out_rows, unsigned char *palette, int desiredNoColours);
};
#endif
// _WX_QUANTIZE_H_
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