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annotate nuklear_ui/font_android.c @ 1965:3a46ff899fa6
More correct implementation of byte printing in builtin debugger. Fix GDB debugger to use helper in backend.c for reading bytes
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 03 May 2020 23:28:42 -0700 |
parents | 78abbabfd58d |
children | 13abdc98379e |
rev | line source |
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1839
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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 "../util.h" |
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6 #include "../paths.h" |
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7 #include "sfnt.h" |
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8 |
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9 typedef enum { |
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10 STATE_DEFAULT, |
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11 STATE_DECL, |
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12 STATE_COMMENT, |
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13 STATE_TAG, |
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14 STATE_PRE_ATTRIB, |
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15 STATE_ATTRIB, |
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16 STATE_PRE_VALUE, |
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17 STATE_VALUE |
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18 } parse_state; |
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19 |
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20 #define DEFAULT_WEIGHT 400 |
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21 |
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22 char *default_font_path(void) |
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23 { |
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24 //Would probably be better to call into Java for this, but this should do for now |
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25 FILE *f = fopen("/system/etc/fonts.xml", "rb"); |
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26 if (!f) { |
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27 return NULL; |
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28 } |
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29 long size = file_size(f); |
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30 char *font_xml = malloc(size+1); |
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31 if (size != fread(font_xml, 1, size, f)) { |
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32 free(font_xml); |
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33 fclose(f); |
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34 return NULL; |
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35 } |
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36 fclose(f); |
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37 font_xml[size] = 0; |
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38 |
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39 char *last_tag = NULL, *last_attrib = NULL, *last_value = NULL; |
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40 uint8_t last_style_was_normal = 0; |
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41 char *capture_best = NULL; |
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42 char *best = NULL; |
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43 int best_weight_diff = INT_MAX; |
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44 int last_weight = INT_MAX; |
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45 parse_state state = STATE_DEFAULT; |
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46 for(char *cur = font_xml; *cur; ++cur) { |
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47 switch (state) |
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48 { |
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49 case STATE_DEFAULT: |
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50 if (*cur == '<' && cur[1]) { |
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51 cur++; |
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52 switch(*cur) |
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53 { |
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54 case '?': |
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55 state = STATE_DECL; |
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56 break; |
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57 case '!': |
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58 if (cur[1] == '-' && cur[2] == '-') { |
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59 state = STATE_COMMENT; |
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60 cur++; |
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61 } else { |
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62 debug_message("Invalid comment\n"); |
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63 cur = font_xml + size - 1; |
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64 } |
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65 break; |
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66 default: |
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67 if (capture_best) { |
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68 cur[-1] = 0; |
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69 best = strip_ws(capture_best); |
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70 capture_best = NULL; |
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71 best_weight_diff = abs(last_weight - DEFAULT_WEIGHT); |
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72 debug_message("Found candidate %s with weight %d\n", best, last_weight); |
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73 } |
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74 state = STATE_TAG; |
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75 last_tag = cur; |
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76 last_attrib = NULL; |
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77 last_value = NULL; |
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78 last_weight = INT_MAX; |
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79 break; |
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80 } |
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81 } |
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82 break; |
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83 case STATE_DECL: |
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84 if (*cur == '?' && cur[1] == '>') { |
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85 cur++; |
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86 state = STATE_DEFAULT; |
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87 } |
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88 break; |
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89 case STATE_COMMENT: |
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90 if (*cur == '-' && cur[1] == '-' && cur[2] == '>') { |
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91 cur += 2; |
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92 state = STATE_DEFAULT; |
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93 } |
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94 break; |
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95 case STATE_TAG: |
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96 if (*cur == ' ' || *cur == '\t' || *cur == '\n' || *cur == '\r') { |
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97 *cur = 0; |
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98 state = STATE_PRE_ATTRIB; |
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99 } else if (*cur == '>') { |
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100 *cur = 0; |
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101 state = STATE_DEFAULT; |
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102 } |
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103 break; |
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104 case STATE_PRE_ATTRIB: |
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105 if (!(*cur == ' ' || *cur == '\t' || *cur == '\n' || *cur == '\r')) { |
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106 if (*cur == '>') { |
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107 state = STATE_DEFAULT; |
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108 if (last_style_was_normal && abs(last_weight - DEFAULT_WEIGHT) < best_weight_diff) { |
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109 capture_best = cur + 1; |
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110 } else if (best && !strcmp("/family", last_tag)) { |
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111 debug_message("found family close tag, stopping search\n"); |
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112 cur = font_xml + size - 1; |
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113 } |
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114 } else { |
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115 last_attrib = cur; |
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116 state = STATE_ATTRIB; |
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117 } |
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118 } |
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119 break; |
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120 case STATE_ATTRIB: |
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121 if (*cur == '=') { |
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122 *cur = 0; |
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123 state = STATE_PRE_VALUE; |
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124 } else if (*cur == ' ' || *cur == '\t' || *cur == '\n' || *cur == '\r') { |
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125 *cur = 0; |
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126 } |
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127 break; |
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128 case STATE_PRE_VALUE: |
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129 if (*cur == '"') { |
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130 state = STATE_VALUE; |
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131 last_value = cur + 1; |
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132 } |
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133 break; |
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134 case STATE_VALUE: |
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135 if (*cur == '"') { |
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136 *cur = 0; |
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137 state = STATE_PRE_ATTRIB; |
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138 if (!strcmp("weight", last_attrib)) { |
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139 last_weight = atoi(last_value); |
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140 } else if (!strcmp("style", last_attrib)) { |
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141 last_style_was_normal = !strcmp("normal", last_value); |
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142 } |
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143 } |
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144 break; |
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145 } |
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146 } |
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147 if (best) { |
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148 best = path_append("/system/fonts", best); |
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149 } |
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150 free(font_xml); |
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151 return best; |
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152 } |
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153 |
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154 static uint8_t *try_load_font(char *path, uint32_t *size_out) |
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155 { |
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156 debug_message("Trying to load font %s\n", path); |
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157 FILE *f = fopen(path, "rb"); |
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158 free(path); |
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159 if (!f) { |
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160 return NULL; |
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161 } |
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162 long size = file_size(f); |
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163 uint8_t *buffer = malloc(size); |
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164 if (size != fread(buffer, 1, size, f)) { |
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165 fclose(f); |
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166 return NULL; |
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167 } |
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168 fclose(f); |
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169 sfnt_container *sfnt = load_sfnt(buffer, size); |
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170 if (!sfnt) { |
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171 free(buffer); |
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172 return NULL; |
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173 } |
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174 return sfnt_flatten(sfnt->tables, size_out); |
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175 } |
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176 |
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177 uint8_t *default_font(uint32_t *size_out) |
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178 { |
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179 char *path = default_font_path(); |
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180 if (!path) { |
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181 goto error; |
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182 } |
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183 uint8_t *ret = try_load_font(path, size_out); |
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184 if (ret) { |
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185 return ret; |
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186 } |
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187 error: |
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188 //try some likely suspects if we failed to parse fonts.xml or failed to find the indicated font |
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189 ret = try_load_font("/system/fonts/Roboto-Regular.ttf", size_out); |
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190 if (!ret) { |
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191 ret = try_load_font("/system/fonts/DroidSans.ttf", size_out); |
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192 } |
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193 return ret; |
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194 } |