libansilove

Library for converting ANSI, ASCII, and other formats to PNG
Log | Files | Refs | README | LICENSE

drawchar.c (1057B)

      1 /*
      2  * drawchar.c
      3  * libansilove 1.3.1
      4  * https://www.ansilove.org
      5  *
      6  * Copyright (c) 2011-2022 Stefan Vogt, Brian Cassidy, and Frederic Cambus
      7  * All rights reserved.
      8  *
      9  * libansilove is licensed under the BSD 2-Clause license.
     10  * See LICENSE file for details.
     11  *
     12  * SPDX-License-Identifier: BSD-2-Clause
     13  */
     14 
     15 #include <gd.h>
     16 
     17 #include "drawchar.h"
     18 
     19 void
     20 drawchar(gdImagePtr im, const uint8_t *font_data, uint32_t bits,
     21     uint32_t height, uint32_t column, uint32_t row,
     22     uint32_t background, uint32_t foreground, uint8_t character)
     23 {
     24 	uint32_t x, y;
     25 
     26 	gdImageFilledRectangle(im, column * bits, row*height, column * bits +
     27 	    bits - 1, row * height + height - 1, background);
     28 
     29 	for (y = 0; y < height; y++) {
     30 		for (x = 0; x < bits; x++) {
     31 
     32 			if (font_data[y+character*height] & (0x80 >> x)) {
     33 				gdImageSetPixel(im, column * bits + x,
     34 				    row*height + y, foreground);
     35 
     36 				if (bits == 9 && x == 7 &&
     37 				    character > 191 && character < 224)
     38 					gdImageSetPixel(im, column * bits + 8,
     39 					    row * height + y, foreground);
     40 			}
     41 		}
     42 	}
     43 }