GNU Unifont: src/unigencircles.c Source File

GNU Unifont 15.1.02 Pan-Unicode font with complete Unicode Plane 0 coverage and partial coverage of higher planes

unigencircles.c
Go to the documentation of this file.
1/**
2 @file unigencircles.c
3
4 @brief unigencircles - Superimpose dashed combining circles
5 on combining glyphs
6
7 @author Paul Hardy
8
9 @copyright Copyright (C) 2013, Paul Hardy.
10*/
11/*
12 LICENSE:
13
14 This program is free software: you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation, either version 2 of the License, or
17 (at your option) any later version.
18
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
23
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>.
26*/
27
28/*
29 8 July 2017 [Paul Hardy]:
30 - Reads new second field that contains an x-axis offset for
31 each combining character in "*combining.txt" files.
32 - Uses the above x-axis offset value for a combining character
33 to print combining circle in the left half of a double
34 diacritic combining character grid, or in the center for
35 other combining characters.
36 - Adds exceptions for U+01107F (Brahmi number joiner) and
37 U+01D1A0 (vertical stroke musical ornament); they are in
38 a combining.txt file for positioning, but are not actually
39 Unicode combining characters.
40 - Typo fix: "single-width"-->"double-width" in comment for
41 add_double_circle function.
42
43 12 August 2017 [Paul Hardy]:
44 - Hard-code Miao vowels to show combining circles after
45 removing them from font/plane01/plane01-combining.txt.
46
47 26 December 2017 [Paul Hardy]:
48 - Remove Miao hard-coding; they are back in unibmp2hex.c and
49 in font/plane01/plane01-combining.txt.
50
51 11 May 2019 [Paul Hardy]:
52 - Changed strncpy calls to memcpy calls to avoid a compiler
53 warning.
54*/
55
56
57#include <stdio.h>
58#include <stdlib.h>
59#include <string.h>
60#include <ctype.h>
61
62#define MAXSTRING 256 ///< Maximum input line length - 1.
63
64
65/**
66 @brief The main function.
67
68 @param[in] argc The count of command line arguments.
69 @param[in] argv Pointer to array of command line arguments.
70 @return This program exits with status EXIT_SUCCESS.
71*/
72int
73main (int argc, char **argv)
74{
75
76 char teststring[MAXSTRING]; /* current input line */
77 int loc; /* Unicode code point of current input line */
78 int offset; /* offset value of a combining character */
79 char *gstart; /* glyph start, pointing into teststring */
80
81 char combining[0x110000]; /* 1 --> combining glyph; 0 --> non-combining */
82 char x_offset [0x110000]; /* second value in *combining.txt files */
83
84 void add_single_circle(char *); /* add a single-width dashed circle */
85 void add_double_circle(char *, int); /* add a double-width dashed circle */
86
87 FILE *infilefp;
88
89 /*
90 if (argc != 3) {
91 fprintf (stderr,
92 "\n\nUsage: %s combining.txt nonprinting.hex < unifont.hex > unifontfull.hex\n\n");
93 exit (EXIT_FAILURE);
94 }
95 */
96
97 /*
98 Read the combining characters list.
99 */
100 /* Start with no combining code points flagged */
101 memset (combining, 0, 0x110000 * sizeof (char));
102 memset (x_offset , 0, 0x110000 * sizeof (char));
103
104 if ((infilefp = fopen (argv[1],"r")) == NULL) {
105 fprintf (stderr,"ERROR - combining characters file %s not found.\n\n",
106 argv[1]);
107 exit (EXIT_FAILURE);
108 }
109
110 /* Flag list of combining characters to add a dashed circle. */
111 while (fscanf (infilefp, "%X:%d", &loc, &offset) != EOF) {
112 /*
113 U+01107F and U+01D1A0 are not defined as combining characters
114 in Unicode; they were added in a combining.txt file as the
115 only way to make them look acceptable in proximity to other
116 glyphs in their script.
117 */
118 if (loc != 0x01107F && loc != 0x01D1A0) {
119 combining[loc] = 1;
120 x_offset [loc] = offset;
121 }
122 }
123 fclose (infilefp); /* all done reading combining.txt */
124
125 /* Now read the non-printing glyphs; they never have dashed circles */
126 if ((infilefp = fopen (argv[2],"r")) == NULL) {
127 fprintf (stderr,"ERROR - nonprinting characters file %s not found.\n\n",
128 argv[1]);
129 exit (EXIT_FAILURE);
130 }
131
132 /* Reset list of nonprinting characters to avoid adding a dashed circle. */
133 while (fscanf (infilefp, "%X:%*s", &loc) != EOF) combining[loc] = 0;
134
135 fclose (infilefp); /* all done reading nonprinting.hex */
136
137 /*
138 Read the hex glyphs.
139 */
140 teststring[MAXSTRING - 1] = '\0'; /* so there's no chance we leave array */
141 while (fgets (teststring, MAXSTRING-1, stdin) != NULL) {
142 sscanf (teststring, "%X", &loc); /* loc == the Uniocde code point */
143 gstart = strchr (teststring,':') + 1; /* start of glyph bitmap */
144 if (combining[loc]) { /* if a combining character */
145 if (strlen (gstart) < 35)
146 add_single_circle (gstart); /* single-width */
147 else
148 add_double_circle (gstart, x_offset[loc]); /* double-width */
149 }
150 printf ("%s", teststring); /* output the new character .hex string */
151 }
152
153 exit (EXIT_SUCCESS);
154}
155
156
157/**
158 @brief Superimpose a single-width dashed combining circle on a glyph bitmap.
159
160 @param[in,out] glyphstring A single-width glyph, 8x16 pixels.
161*/
162void
163add_single_circle (char *glyphstring)
164{
165
166 char newstring[256];
167 /* Circle hex string pattern is "00000008000024004200240000000000" */
168 char circle[32]={0x0,0x0, /* row 1 */
169 0x0,0x0, /* row 2 */
170 0x0,0x0, /* row 3 */
171 0x0,0x0, /* row 4 */
172 0x0,0x0, /* row 5 */
173 0x0,0x0, /* row 6 */
174 0x2,0x4, /* row 7 */
175 0x0,0x0, /* row 8 */
176 0x4,0x2, /* row 9 */
177 0x0,0x0, /* row 10 */
178 0x2,0x4, /* row 11 */
179 0x0,0x0, /* row 12 */
180 0x0,0x0, /* row 13 */
181 0x0,0x0, /* row 14 */
182 0x0,0x0, /* row 15 */
183 0x0,0x0}; /* row 16 */
184
185 int digit1, digit2; /* corresponding digits in each string */
186
187 int i; /* index variables */
188
189 /* for each character position, OR the corresponding circle glyph value */
190 for (i = 0; i < 32; i++) {
191 glyphstring[i] = toupper (glyphstring[i]);
192
193 /* Convert ASCII character to a hexadecimal integer */
194 digit1 = (glyphstring[i] <= '9') ?
195 (glyphstring[i] - '0') : (glyphstring[i] - 'A' + 0xA);
196
197 /* Superimpose dashed circle */
198 digit2 = digit1 | circle[i];
199
200 /* Convert hexadecimal integer to an ASCII character */
201 newstring[i] = (digit2 <= 9) ?
202 ('0' + digit2) : ('A' + digit2 - 0xA);
203 }
204
205 /* Terminate string for output */
206 newstring[i++] = '\n';
207 newstring[i++] = '\0';
208
209 memcpy (glyphstring, newstring, i);
210
211 return;
212}
213
214
215/**
216 @brief Superimpose a double-width dashed combining circle on a glyph bitmap.
217
218 @param[in,out] glyphstring A double-width glyph, 16x16 pixels.
219*/
220void
221add_double_circle (char *glyphstring, int offset)
222{
223
224 char newstring[256];
225 /* Circle hex string pattern is "00000008000024004200240000000000" */
226
227 /* For double diacritical glyphs (offset = -8) */
228 /* Combining circle is left-justified. */
229 char circle08[64]={0x0,0x0,0x0,0x0, /* row 1 */
230 0x0,0x0,0x0,0x0, /* row 2 */
231 0x0,0x0,0x0,0x0, /* row 3 */
232 0x0,0x0,0x0,0x0, /* row 4 */
233 0x0,0x0,0x0,0x0, /* row 5 */
234 0x0,0x0,0x0,0x0, /* row 6 */
235 0x2,0x4,0x0,0x0, /* row 7 */
236 0x0,0x0,0x0,0x0, /* row 8 */
237 0x4,0x2,0x0,0x0, /* row 9 */
238 0x0,0x0,0x0,0x0, /* row 10 */
239 0x2,0x4,0x0,0x0, /* row 11 */
240 0x0,0x0,0x0,0x0, /* row 12 */
241 0x0,0x0,0x0,0x0, /* row 13 */
242 0x0,0x0,0x0,0x0, /* row 14 */
243 0x0,0x0,0x0,0x0, /* row 15 */
244 0x0,0x0,0x0,0x0}; /* row 16 */
245
246 /* For all other combining glyphs (offset = -16) */
247 /* Combining circle is centered in 16 columns. */
248 char circle16[64]={0x0,0x0,0x0,0x0, /* row 1 */
249 0x0,0x0,0x0,0x0, /* row 2 */
250 0x0,0x0,0x0,0x0, /* row 3 */
251 0x0,0x0,0x0,0x0, /* row 4 */
252 0x0,0x0,0x0,0x0, /* row 5 */
253 0x0,0x0,0x0,0x0, /* row 6 */
254 0x0,0x2,0x4,0x0, /* row 7 */
255 0x0,0x0,0x0,0x0, /* row 8 */
256 0x0,0x4,0x2,0x0, /* row 9 */
257 0x0,0x0,0x0,0x0, /* row 10 */
258 0x0,0x2,0x4,0x0, /* row 11 */
259 0x0,0x0,0x0,0x0, /* row 12 */
260 0x0,0x0,0x0,0x0, /* row 13 */
261 0x0,0x0,0x0,0x0, /* row 14 */
262 0x0,0x0,0x0,0x0, /* row 15 */
263 0x0,0x0,0x0,0x0}; /* row 16 */
264
265 char *circle; /* points into circle16 or circle08 */
266
267 int digit1, digit2; /* corresponding digits in each string */
268
269 int i; /* index variables */
270
271
272 /*
273 Determine if combining circle is left-justified (offset = -8)
274 or centered (offset = -16).
275 */
276 circle = (offset >= -8) ? circle08 : circle16;
277
278 /* for each character position, OR the corresponding circle glyph value */
279 for (i = 0; i < 64; i++) {
280 glyphstring[i] = toupper (glyphstring[i]);
281
282 /* Convert ASCII character to a hexadecimal integer */
283 digit1 = (glyphstring[i] <= '9') ?
284 (glyphstring[i] - '0') : (glyphstring[i] - 'A' + 0xA);
285
286 /* Superimpose dashed circle */
287 digit2 = digit1 | circle[i];
288
289 /* Convert hexadecimal integer to an ASCII character */
290 newstring[i] = (digit2 <= 9) ?
291 ('0' + digit2) : ('A' + digit2 - 0xA);
292 }
293
294 /* Terminate string for output */
295 newstring[i++] = '\n';
296 newstring[i++] = '\0';
297
298 memcpy (glyphstring, newstring, i);
299
300 return;
301}
302
add_double_circle
void add_double_circle(char *glyphstring, int offset)
Superimpose a double-width dashed combining circle on a glyph bitmap.
Definition: unigencircles.c:221
MAXSTRING
#define MAXSTRING
Maximum input line length - 1.
Definition: unigencircles.c:62
main
int main(int argc, char **argv)
The main function.
Definition: unigencircles.c:73
add_single_circle
void add_single_circle(char *glyphstring)
Superimpose a single-width dashed combining circle on a glyph bitmap.
Definition: unigencircles.c:163