| | 1 | ///////////////////////////////////////////////////////////////////////////// |
| | 2 | // Name: wx/quantize.h |
| | 3 | // Purpose: wxQuantizer class |
| | 4 | // Author: Julian Smart |
| | 5 | // Modified by: |
| | 6 | // Created: 22/6/2000 |
| | 7 | // RCS-ID: $Id$ |
| | 8 | // Copyright: (c) Julian Smart |
| | 9 | // Licence: |
| | 10 | ///////////////////////////////////////////////////////////////////////////// |
| | 11 | |
| | 12 | #ifndef _WX_QUANTIZE_H_ |
| | 13 | #define _WX_QUANTIZE_H_ |
| | 14 | |
| | 15 | #include "wx/object.h" |
| | 16 | |
| | 17 | /* |
| | 18 | * From jquant2.c |
| | 19 | * |
| | 20 | * Copyright (C) 1991-1996, Thomas G. Lane. |
| | 21 | * This file is part of the Independent JPEG Group's software. |
| | 22 | * For conditions of distribution and use, see the accompanying README file. |
| | 23 | */ |
| | 24 | |
| | 25 | class WXDLLEXPORT wxImage; |
| | 26 | class WXDLLEXPORT wxPalette; |
| | 27 | |
| | 28 | /* |
| | 29 | * wxQuantize |
| | 30 | * Based on the JPEG quantization code. Reduces the number of colours in a wxImage. |
| | 31 | */ |
| | 32 | |
| | 33 | #define wxQUANTIZE_INCLUDE_WINDOWS_COLOURS 0x01 |
| | 34 | #define wxQUANTIZE_RETURN_8BIT_DATA 0x02 |
| | 35 | #define wxQUANTIZE_FILL_DESTINATION_IMAGE 0x04 |
| | 36 | |
| | 37 | class WXDLLEXPORT wxQuantize: public wxObject |
| | 38 | { |
| | 39 | public: |
| | 40 | DECLARE_DYNAMIC_CLASS(wxQuantize) |
| | 41 | |
| | 42 | //// Constructor |
| | 43 | |
| | 44 | wxQuantize() {} |
| | 45 | virtual ~wxQuantize() {} |
| | 46 | |
| | 47 | //// Operations |
| | 48 | |
| | 49 | // Reduce the colours in the source image and put the result into the |
| | 50 | // destination image. Both images may be the same, to overwrite the source image. |
| | 51 | // Specify an optional palette pointer to receive the resulting palette. |
| | 52 | // This palette may be passed to ConvertImageToBitmap, for example. |
| | 53 | // If you pass a palette pointer, you must free the palette yourself. |
| | 54 | |
| | 55 | static bool Quantize(const wxImage& src, wxImage& dest, wxPalette** pPalette, int desiredNoColours = 236, |
| | 56 | unsigned char** eightBitData = 0, int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS|wxQUANTIZE_FILL_DESTINATION_IMAGE|wxQUANTIZE_RETURN_8BIT_DATA); |
| | 57 | |
| | 58 | // This version sets a palette in the destination image so you don't |
| | 59 | // have to manage it yourself. |
| | 60 | |
| | 61 | static bool Quantize(const wxImage& src, wxImage& dest, int desiredNoColours = 236, |
| | 62 | unsigned char** eightBitData = 0, int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS|wxQUANTIZE_FILL_DESTINATION_IMAGE|wxQUANTIZE_RETURN_8BIT_DATA); |
| | 63 | |
| | 64 | //// Helpers |
| | 65 | |
| | 66 | // Converts input bitmap(s) into 8bit representation with custom palette |
| | 67 | |
| | 68 | // in_rows and out_rows are arrays [0..h-1] of pointer to rows |
| | 69 | // (in_rows contains w * 3 bytes per row, out_rows w bytes per row) |
| | 70 | // fills out_rows with indexes into palette (which is also stored into palette variable) |
| | 71 | static void DoQuantize(unsigned w, unsigned h, unsigned char **in_rows, unsigned char **out_rows, unsigned char *palette, int desiredNoColours); |
| | 72 | |
| | 73 | }; |
| | 74 | |
| | 75 | #endif |
| | 76 | // _WX_QUANTIZE_H_ |
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