projects / wxWidgets.git / blame
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| 3f4fc796 JS |
1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: 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 | /* | |
| 13 | * From jquant2.c | |
| 14 | * | |
| 15 | * Copyright (C) 1991-1996, Thomas G. Lane. | |
| 16 | * This file is part of the Independent JPEG Group's software. | |
| 17 | * For conditions of distribution and use, see the accompanying README file. | |
| 18 | */ | |
| 19 | ||
| 20 | #ifdef __GNUG__ | |
| 21 | #pragma interface "quantize.h" | |
| 22 | #endif | |
| 23 | ||
| 24 | #ifndef _WX_QUANTIZE_H_ | |
| 25 | #define _WX_QUANTIZE_H_ | |
| 26 | ||
| 27 | class WXDLLEXPORT wxImage; | |
| 28 | ||
| 29 | /* | |
| 30 | * wxQuantize | |
| 31 | * Based on the JPEG quantization code. Reduces the number of colours in a wxImage. | |
| 32 | */ | |
| 33 | ||
| 34 | #define wxQUANTIZE_INCLUDE_WINDOWS_COLOURS 0x01 | |
| 35 | #define wxQUANTIZE_RETURN_8BIT_DATA 0x02 | |
| 36 | #define wxQUANTIZE_FILL_DESTINATION_IMAGE 0x04 | |
| 37 | ||
| 38 | class WXDLLEXPORT wxQuantize: public wxObject | |
| 39 | { | |
| 40 | public: | |
| 41 | DECLARE_DYNAMIC_CLASS(wxQuantize) | |
| 42 | ||
| 43 | //// Constructor | |
| 44 | ||
| d84afea9 GD |
45 | wxQuantize() {} |
| 46 | ~wxQuantize() {} | |
| 3f4fc796 JS |
47 | |
| 48 | //// Operations | |
| 49 | ||
| 50 | // Reduce the colours in the source image and put the result into the | |
| 51 | // destination image. Both images may be the same, to overwrite the source image. | |
| 52 | // Specify an optional palette pointer to receive the resulting palette. | |
| 53 | // This palette may be passed to ConvertImageToBitmap, for example. | |
| 54 | // If you pass a palette pointer, you must free the palette yourself. | |
| 55 | ||
| 85d03040 | 56 | static bool Quantize(const wxImage& src, wxImage& dest, wxPalette** pPalette, int desiredNoColours = 236, |
| 3f4fc796 JS |
57 | unsigned char** eightBitData = 0, int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS|wxQUANTIZE_FILL_DESTINATION_IMAGE|wxQUANTIZE_RETURN_8BIT_DATA); |
| 58 | ||
| 2f382cc6 JS |
59 | // This version sets a palette in the destination image so you don't |
| 60 | // have to manage it yourself. | |
| 61 | ||
| 62 | static bool Quantize(const wxImage& src, wxImage& dest, int desiredNoColours = 236, | |
| 63 | unsigned char** eightBitData = 0, int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS|wxQUANTIZE_FILL_DESTINATION_IMAGE|wxQUANTIZE_RETURN_8BIT_DATA); | |
| 64 | ||
| 3f4fc796 JS |
65 | //// Helpers |
| 66 | ||
| 67 | // Converts input bitmap(s) into 8bit representation with custom palette | |
| 68 | ||
| 69 | // in_rows and out_rows are arrays [0..h-1] of pointer to rows | |
| 70 | // (in_rows contains w * 3 bytes per row, out_rows w bytes per row) | |
| 71 | // fills out_rows with indexes into palette (which is also stored into palette variable) | |
| 72 | static void DoQuantize(unsigned w, unsigned h, unsigned char **in_rows, unsigned char **out_rows, unsigned char *palette, int desiredNoColours); | |
| 73 | ||
| 74 | }; | |
| 75 | ||
| 76 | #endif | |
| 77 | // _WX_QUANTIZE_H_ | |
| 78 |