1 /* 2 * Common font-related functions. 3 * 4 * Copyright (C) 2018 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 3 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef __FONT_H__ 21 #define __FONT_H__ 22 23 #include <stdint.h> 24 25 26 27 /* Character definition structure. */ 28 29 typedef struct 30 { 31 uint8_t width; 32 uint8_t height; 33 uint8_t data[]; 34 35 } char_definition_t; 36 37 typedef struct 38 { 39 uint32_t base; 40 uint32_t limit; 41 uint32_t table[]; 42 43 } font_range_t; 44 45 /* Font configuration type. */ 46 47 typedef struct 48 { 49 char_definition_t *chars; 50 font_range_t *range; 51 52 } font_config_t; 53 54 55 56 /* Initialise a font. 57 58 Font(<name>, uint8_t *chars, font_range_t *range) 59 */ 60 61 #define Font(NAME, CHARS, RANGE) \ 62 font_config_t NAME = { \ 63 .chars = (char_definition_t *) (CHARS), \ 64 .range = RANGE}; 65 66 /* Access functions. */ 67 68 char_definition_t *get_char_definition(font_config_t *cfg, char c); 69 70 int write_char(display_config_t *cfg, font_config_t *fcfg, char c, 71 int x, int y, uint8_t colour); 72 73 void write_string(display_config_t *cfg, font_config_t *fcfg, const char *s, 74 int *x, int *y, uint8_t colour); 75 76 #endif /* __FONT_H__ */