1 /* -*- c -*- */ 2 3 /* 4 * zoom.h 5 * 6 * metapixel 7 * 8 * Copyright (C) 2004 Mark Probst 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 2 13 * of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 23 */ 24 25 #ifndef __ZOOM_H__ 26 #define __ZOOM_H__ 27 28 typedef float (*filter_func_t) (float); 29 30 typedef struct 31 { 32 filter_func_t func; 33 float support_radius; 34 } filter_t; 35 36 #define FILTER_BOX 0 37 #define FILTER_TRIANGLE 1 38 #define FILTER_MITCHELL 2 39 40 filter_t* get_filter (int index); 41 42 void zoom_image (unsigned char *dest, unsigned char *src, 43 filter_t *filter, int num_channels, 44 int dest_width, int dest_height, int dest_row_stride, 45 int src_width, int src_height, int src_row_stride); 46 47 #endif 48