Mercurial > repos > blastem
annotate nuklear_ui/font_android.c @ 2045:b119e0de9a70 proprietary
Strip out mega wifi support and debugger
author | Michael Pavone <pavone@retrodev.com> |
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date | Tue, 21 Sep 2021 23:17:34 -0700 |
parents | 13abdc98379e |
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rev | line source |
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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 <limits.h> |
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5 #include <string.h> |
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6 #include "../util.h" |
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7 #include "../paths.h" |
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8 #include "sfnt.h" |
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9 |
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10 typedef enum { |
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11 STATE_DEFAULT, |
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12 STATE_DECL, |
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13 STATE_COMMENT, |
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14 STATE_TAG, |
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15 STATE_PRE_ATTRIB, |
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16 STATE_ATTRIB, |
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17 STATE_PRE_VALUE, |
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18 STATE_VALUE |
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19 } parse_state; |
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20 |
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21 #define DEFAULT_WEIGHT 400 |
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22 |
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23 char *default_font_path(void) |
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24 { |
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25 //Would probably be better to call into Java for this, but this should do for now |
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26 FILE *f = fopen("/system/etc/fonts.xml", "rb"); |
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27 if (!f) { |
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28 return NULL; |
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29 } |
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30 long size = file_size(f); |
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31 char *font_xml = malloc(size+1); |
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32 if (size != fread(font_xml, 1, size, f)) { |
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33 free(font_xml); |
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34 fclose(f); |
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35 return NULL; |
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36 } |
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37 fclose(f); |
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38 font_xml[size] = 0; |
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39 |
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40 char *last_tag = NULL, *last_attrib = NULL, *last_value = NULL; |
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41 uint8_t last_style_was_normal = 0; |
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42 char *capture_best = NULL; |
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43 char *best = NULL; |
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44 int best_weight_diff = INT_MAX; |
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45 int last_weight = INT_MAX; |
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46 parse_state state = STATE_DEFAULT; |
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47 for(char *cur = font_xml; *cur; ++cur) { |
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48 switch (state) |
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49 { |
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50 case STATE_DEFAULT: |
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51 if (*cur == '<' && cur[1]) { |
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52 cur++; |
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53 switch(*cur) |
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54 { |
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55 case '?': |
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56 state = STATE_DECL; |
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57 break; |
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58 case '!': |
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59 if (cur[1] == '-' && cur[2] == '-') { |
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60 state = STATE_COMMENT; |
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61 cur++; |
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62 } else { |
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63 debug_message("Invalid comment\n"); |
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64 cur = font_xml + size - 1; |
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65 } |
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66 break; |
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67 default: |
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68 if (capture_best) { |
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69 cur[-1] = 0; |
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70 best = strip_ws(capture_best); |
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71 capture_best = NULL; |
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72 best_weight_diff = abs(last_weight - DEFAULT_WEIGHT); |
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73 debug_message("Found candidate %s with weight %d\n", best, last_weight); |
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74 } |
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75 state = STATE_TAG; |
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76 last_tag = cur; |
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77 last_attrib = NULL; |
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78 last_value = NULL; |
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79 last_weight = INT_MAX; |
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80 break; |
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81 } |
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82 } |
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83 break; |
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84 case STATE_DECL: |
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85 if (*cur == '?' && cur[1] == '>') { |
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86 cur++; |
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87 state = STATE_DEFAULT; |
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88 } |
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89 break; |
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90 case STATE_COMMENT: |
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91 if (*cur == '-' && cur[1] == '-' && cur[2] == '>') { |
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92 cur += 2; |
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93 state = STATE_DEFAULT; |
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94 } |
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95 break; |
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96 case STATE_TAG: |
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97 if (*cur == ' ' || *cur == '\t' || *cur == '\n' || *cur == '\r') { |
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98 *cur = 0; |
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99 state = STATE_PRE_ATTRIB; |
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100 } else if (*cur == '>') { |
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101 *cur = 0; |
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102 state = STATE_DEFAULT; |
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103 } |
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104 break; |
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105 case STATE_PRE_ATTRIB: |
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106 if (!(*cur == ' ' || *cur == '\t' || *cur == '\n' || *cur == '\r')) { |
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107 if (*cur == '>') { |
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108 state = STATE_DEFAULT; |
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109 if (last_style_was_normal && abs(last_weight - DEFAULT_WEIGHT) < best_weight_diff) { |
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110 capture_best = cur + 1; |
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111 } else if (best && !strcmp("/family", last_tag)) { |
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112 debug_message("found family close tag, stopping search\n"); |
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113 cur = font_xml + size - 1; |
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114 } |
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115 } else { |
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116 last_attrib = cur; |
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117 state = STATE_ATTRIB; |
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118 } |
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119 } |
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120 break; |
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121 case STATE_ATTRIB: |
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122 if (*cur == '=') { |
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123 *cur = 0; |
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124 state = STATE_PRE_VALUE; |
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125 } else if (*cur == ' ' || *cur == '\t' || *cur == '\n' || *cur == '\r') { |
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126 *cur = 0; |
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127 } |
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128 break; |
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129 case STATE_PRE_VALUE: |
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130 if (*cur == '"') { |
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131 state = STATE_VALUE; |
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132 last_value = cur + 1; |
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133 } |
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134 break; |
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135 case STATE_VALUE: |
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136 if (*cur == '"') { |
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137 *cur = 0; |
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138 state = STATE_PRE_ATTRIB; |
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139 if (!strcmp("weight", last_attrib)) { |
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140 last_weight = atoi(last_value); |
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141 } else if (!strcmp("style", last_attrib)) { |
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142 last_style_was_normal = !strcmp("normal", last_value); |
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143 } |
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144 } |
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145 break; |
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146 } |
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147 } |
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148 if (best) { |
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149 best = path_append("/system/fonts", best); |
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150 } |
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151 free(font_xml); |
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152 return best; |
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153 } |
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154 |
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155 static uint8_t *try_load_font(char *path, uint32_t *size_out) |
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156 { |
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157 debug_message("Trying to load font %s\n", path); |
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158 FILE *f = fopen(path, "rb"); |
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159 free(path); |
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160 if (!f) { |
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161 return NULL; |
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162 } |
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163 long size = file_size(f); |
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164 uint8_t *buffer = malloc(size); |
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165 if (size != fread(buffer, 1, size, f)) { |
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166 fclose(f); |
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167 return NULL; |
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168 } |
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169 fclose(f); |
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170 sfnt_container *sfnt = load_sfnt(buffer, size); |
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171 if (!sfnt) { |
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172 free(buffer); |
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173 return NULL; |
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174 } |
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175 return sfnt_flatten(sfnt->tables, size_out); |
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176 } |
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177 |
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178 uint8_t *default_font(uint32_t *size_out) |
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179 { |
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180 char *path = default_font_path(); |
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181 if (!path) { |
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182 goto error; |
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183 } |
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184 uint8_t *ret = try_load_font(path, size_out); |
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185 if (ret) { |
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186 return ret; |
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187 } |
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188 error: |
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189 //try some likely suspects if we failed to parse fonts.xml or failed to find the indicated font |
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190 ret = try_load_font(strdup("/system/fonts/Roboto-Regular.ttf"), size_out); |
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191 if (!ret) { |
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192 ret = try_load_font(strdup("/system/fonts/DroidSans.ttf"), size_out); |
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193 } |
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194 return ret; |
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195 } |