GNU Unifont: src/unigencircles.c File Reference

GNU Unifont 15.1.05 Pan-Unicode font with complete Unicode Plane 0 coverage and partial coverage of higher planes

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unigencircles.c File Reference

unigencircles - Superimpose dashed combining circles on combining glyphs More...

`#include <stdio.h>`
`#include <stdlib.h>`
`#include <string.h>`
`#include <ctype.h>`
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## Macros
#define | MAXSTRING 256
| Maximum input line length - 1.

## Functions
int | main (int argc, char **argv)
| The main function.
void | add_single_circle (char *glyphstring)
| Superimpose a single-width dashed combining circle on a glyph bitmap.
void | add_double_circle (char *glyphstring, int offset)
| Superimpose a double-width dashed combining circle on a glyph bitmap.

## Detailed Description

unigencircles - Superimpose dashed combining circles on combining glyphs

Author
  Paul Hardy

Copyright
  Copyright (C) 2013, Paul Hardy.

Definition in file unigencircles.c.

## Macro Definition Documentation

## ◆ MAXSTRING

#define MAXSTRING 256

Maximum input line length - 1.

Definition at line 62 of file unigencircles.c.

## Function Documentation

## ◆ add_double_circle()

void add_double_circle | ( | char * | glyphstring,
|  | int | offset
| ) |  |

Superimpose a double-width dashed combining circle on a glyph bitmap.

Parameters

  [in,out] | glyphstring | A double-width glyph, 16x16 pixels.

Definition at line 221 of file unigencircles.c.

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}
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## ◆ add_single_circle()

void add_single_circle | ( | char * | glyphstring | ) |

Superimpose a single-width dashed combining circle on a glyph bitmap.

Parameters

  [in,out] | glyphstring | A single-width glyph, 8x16 pixels.

Definition at line 163 of file unigencircles.c.

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}
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## ◆ main()

int main | ( | int | argc,
|  | char ** | argv
| ) |  |

The main function.

Parameters

  [in] | argc | The count of command line arguments.
  [in] | argv | Pointer to array of command line arguments.

Returns
  This program exits with status EXIT_SUCCESS.

Definition at line 73 of file unigencircles.c.

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}
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
add_single_circle
void add_single_circle(char *glyphstring)
Superimpose a single-width dashed combining circle on a glyph bitmap.
Definition: unigencircles.c:163
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