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annotate nuklear_ui/font.c @ 1976:3dd9c68472fb

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Specify desired language when invoking fc-match to find an appropriate font on Linux
author Michael Pavone <pavone@retrodev.com>
date Sat, 09 May 2020 13:15:49 -0700
parents 253c62b7144e
children 369a52e302e2
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <stdint.h>
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4 #include <string.h>
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5 #include "../util.h"
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6 #include "sfnt.h"
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7
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8 char *default_font_path(void)
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9 {
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10 #ifdef FONT_PATH
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11 FILE *f = fopen(FONT_PATH, "rb");
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12 if (f) {
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13 fclose(f);
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14 return strdup(FONT_PATH);
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15 }
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16 #endif
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3dd9c68472fb Specify desired language when invoking fc-match to find an appropriate font on Linux
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17 //TODO: specify language dynamically once BlastEm is localized
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parents: 1934
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18 FILE *fc_pipe = popen("fc-match :lang=en -f '%{file}'", "r");
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19 if (!fc_pipe) {
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20 return NULL;
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21 }
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22 size_t buf_size = 128;
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23 char *buffer = NULL;
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24 size_t total = 0, read = 0;
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25 do {
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26 total += read;
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27 buf_size *= 2;
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28 buffer = realloc(buffer, buf_size);
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29 if (!buffer) {
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30 return NULL;
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31 }
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32 read = fread(buffer, 1, buf_size - total, fc_pipe);
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33 } while (read == (buf_size - total));
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34 total += read;
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35 buffer[total] = 0;
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36
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37 return buffer;
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38 }
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4f6e8acd7b6a Added support for TTC and dfont format true type fonts. More robust font selection on Windows
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parents: 1474
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39
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40 uint8_t *default_font(uint32_t *size_out)
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41 {
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42 char *path = default_font_path();
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43 if (!path) {
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44 goto error;
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Michael Pavone <pavone@retrodev.com>
parents: 1474
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45 }
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parents: 1474
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46 FILE *f = fopen(path, "rb");
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24508cb54f87 Fix a number of other memory errors (mostly leaks again) identified by valgrind
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47 free(path);
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48 if (!f) {
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49 goto error;
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parents: 1474
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50 }
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51 long size = file_size(f);
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52 uint8_t *buffer = malloc(size);
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53 if (size != fread(buffer, 1, size, f)) {
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54 fclose(f);
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55 goto error;
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56 }
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57 fclose(f);
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58 sfnt_container *sfnt = load_sfnt(buffer, size);
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59 if (!sfnt) {
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60 free(buffer);
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61 goto error;
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62 }
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63 return sfnt_flatten(sfnt->tables, size_out);
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64 error:
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65 //TODO: try to find a suitable font in /usr/share/fonts as a fallback
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66 return NULL;
4f6e8acd7b6a Added support for TTC and dfont format true type fonts. More robust font selection on Windows
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parents: 1474
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67 }