author | prr |
Thu, 07 Dec 2017 11:55:06 -0800 | |
changeset 48274 | 51772bf1fb0c |
parent 47216 | 71c04702a3d5 |
child 50826 | f5b95be8b6e2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright © 2013 Google, Inc. |
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* |
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* This is part of HarfBuzz, a text shaping library. |
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* |
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* Permission is hereby granted, without written agreement and without |
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* license or royalty fees, to use, copy, modify, and distribute this |
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* software and its documentation for any purpose, provided that the |
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* above copyright notice and the following two paragraphs appear in |
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* all copies of this software. |
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* |
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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* |
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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* |
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* Google Author(s): Behdad Esfahbod |
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*/ |
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#include "hb-ot-shape-complex-private.hh" |
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/* Hangul shaper */ |
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/* Same order as the feature array below */ |
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enum { |
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_JMO, |
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LJMO, |
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VJMO, |
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TJMO, |
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FIRST_HANGUL_FEATURE = LJMO, |
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HANGUL_FEATURE_COUNT = TJMO + 1 |
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}; |
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static const hb_tag_t hangul_features[HANGUL_FEATURE_COUNT] = |
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{ |
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HB_TAG_NONE, |
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HB_TAG('l','j','m','o'), |
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HB_TAG('v','j','m','o'), |
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HB_TAG('t','j','m','o') |
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}; |
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static void |
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collect_features_hangul (hb_ot_shape_planner_t *plan) |
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{ |
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hb_ot_map_builder_t *map = &plan->map; |
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for (unsigned int i = FIRST_HANGUL_FEATURE; i < HANGUL_FEATURE_COUNT; i++) |
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map->add_feature (hangul_features[i], 1, F_NONE); |
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} |
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static void |
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override_features_hangul (hb_ot_shape_planner_t *plan) |
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{ |
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/* Uniscribe does not apply 'calt' for Hangul, and certain fonts |
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* (Noto Sans CJK, Source Sans Han, etc) apply all of jamo lookups |
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* in calt, which is not desirable. */ |
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plan->map.add_feature (HB_TAG('c','a','l','t'), 0, F_GLOBAL); |
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} |
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struct hangul_shape_plan_t |
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{ |
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ASSERT_POD (); |
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hb_mask_t mask_array[HANGUL_FEATURE_COUNT]; |
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}; |
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static void * |
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data_create_hangul (const hb_ot_shape_plan_t *plan) |
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{ |
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hangul_shape_plan_t *hangul_plan = (hangul_shape_plan_t *) calloc (1, sizeof (hangul_shape_plan_t)); |
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if (unlikely (!hangul_plan)) |
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return nullptr; |
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for (unsigned int i = 0; i < HANGUL_FEATURE_COUNT; i++) |
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hangul_plan->mask_array[i] = plan->map.get_1_mask (hangul_features[i]); |
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return hangul_plan; |
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} |
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static void |
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data_destroy_hangul (void *data) |
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{ |
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free (data); |
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} |
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/* Constants for algorithmic hangul syllable [de]composition. */ |
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#define LBase 0x1100u |
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#define VBase 0x1161u |
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#define TBase 0x11A7u |
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#define LCount 19u |
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#define VCount 21u |
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#define TCount 28u |
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#define SBase 0xAC00u |
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#define NCount (VCount * TCount) |
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#define SCount (LCount * NCount) |
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#define isCombiningL(u) (hb_in_range<hb_codepoint_t> ((u), LBase, LBase+LCount-1)) |
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#define isCombiningV(u) (hb_in_range<hb_codepoint_t> ((u), VBase, VBase+VCount-1)) |
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#define isCombiningT(u) (hb_in_range<hb_codepoint_t> ((u), TBase+1, TBase+TCount-1)) |
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#define isCombinedS(u) (hb_in_range<hb_codepoint_t> ((u), SBase, SBase+SCount-1)) |
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#define isL(u) (hb_in_ranges<hb_codepoint_t> ((u), 0x1100u, 0x115Fu, 0xA960u, 0xA97Cu)) |
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#define isV(u) (hb_in_ranges<hb_codepoint_t> ((u), 0x1160u, 0x11A7u, 0xD7B0u, 0xD7C6u)) |
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#define isT(u) (hb_in_ranges<hb_codepoint_t> ((u), 0x11A8u, 0x11FFu, 0xD7CBu, 0xD7FBu)) |
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#define isHangulTone(u) (hb_in_range<hb_codepoint_t> ((u), 0x302Eu, 0x302Fu)) |
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/* buffer var allocations */ |
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#define hangul_shaping_feature() complex_var_u8_0() /* hangul jamo shaping feature */ |
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static bool |
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is_zero_width_char (hb_font_t *font, |
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hb_codepoint_t unicode) |
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{ |
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hb_codepoint_t glyph; |
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return hb_font_get_glyph (font, unicode, 0, &glyph) && hb_font_get_glyph_h_advance (font, glyph) == 0; |
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128 |
} |
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129 |
|
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130 |
static void |
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131 |
preprocess_text_hangul (const hb_ot_shape_plan_t *plan, |
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132 |
hb_buffer_t *buffer, |
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133 |
hb_font_t *font) |
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134 |
{ |
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135 |
HB_BUFFER_ALLOCATE_VAR (buffer, hangul_shaping_feature); |
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136 |
|
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137 |
/* Hangul syllables come in two shapes: LV, and LVT. Of those: |
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138 |
* |
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139 |
* - LV can be precomposed, or decomposed. Lets call those |
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140 |
* <LV> and <L,V>, |
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141 |
* - LVT can be fully precomposed, partically precomposed, or |
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142 |
* fully decomposed. Ie. <LVT>, <LV,T>, or <L,V,T>. |
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143 |
* |
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144 |
* The composition / decomposition is mechanical. However, not |
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145 |
* all <L,V> sequences compose, and not all <LV,T> sequences |
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146 |
* compose. |
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147 |
* |
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148 |
* Here are the specifics: |
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149 |
* |
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150 |
* - <L>: U+1100..115F, U+A960..A97F |
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151 |
* - <V>: U+1160..11A7, U+D7B0..D7C7 |
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152 |
* - <T>: U+11A8..11FF, U+D7CB..D7FB |
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153 |
* |
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154 |
* - Only the <L,V> sequences for the 11xx ranges combine. |
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155 |
* - Only <LV,T> sequences for T in U+11A8..11C3 combine. |
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156 |
* |
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157 |
* Here is what we want to accomplish in this shaper: |
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158 |
* |
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159 |
* - If the whole syllable can be precomposed, do that, |
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160 |
* - Otherwise, fully decompose and apply ljmo/vjmo/tjmo features. |
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161 |
* - If a valid syllable is followed by a Hangul tone mark, reorder the tone |
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162 |
* mark to precede the whole syllable - unless it is a zero-width glyph, in |
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163 |
* which case we leave it untouched, assuming it's designed to overstrike. |
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164 |
* |
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165 |
* That is, of the different possible syllables: |
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166 |
* |
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167 |
* <L> |
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168 |
* <L,V> |
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169 |
* <L,V,T> |
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170 |
* <LV> |
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171 |
* <LVT> |
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172 |
* <LV, T> |
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173 |
* |
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174 |
* - <L> needs no work. |
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175 |
* |
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176 |
* - <LV> and <LVT> can stay the way they are if the font supports them, otherwise we |
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177 |
* should fully decompose them if font supports. |
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178 |
* |
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179 |
* - <L,V> and <L,V,T> we should compose if the whole thing can be composed. |
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180 |
* |
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181 |
* - <LV,T> we should compose if the whole thing can be composed, otherwise we should |
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182 |
* decompose. |
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183 |
*/ |
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184 |
|
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185 |
buffer->clear_output (); |
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186 |
unsigned int start = 0, end = 0; /* Extent of most recently seen syllable; |
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187 |
* valid only if start < end |
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188 |
*/ |
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189 |
unsigned int count = buffer->len; |
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190 |
|
40435 | 191 |
for (buffer->idx = 0; buffer->idx < count && !buffer->in_error;) |
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192 |
{ |
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193 |
hb_codepoint_t u = buffer->cur().codepoint; |
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194 |
|
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195 |
if (isHangulTone (u)) |
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196 |
{ |
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197 |
/* |
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198 |
* We could cache the width of the tone marks and the existence of dotted-circle, |
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199 |
* but the use of the Hangul tone mark characters seems to be rare enough that |
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200 |
* I didn't bother for now. |
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201 |
*/ |
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202 |
if (start < end && end == buffer->out_len) |
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203 |
{ |
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204 |
/* Tone mark follows a valid syllable; move it in front, unless it's zero width. */ |
48274 | 205 |
buffer->unsafe_to_break_from_outbuffer (start, buffer->idx); |
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206 |
buffer->next_glyph (); |
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207 |
if (!is_zero_width_char (font, u)) |
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208 |
{ |
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209 |
buffer->merge_out_clusters (start, end + 1); |
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210 |
hb_glyph_info_t *info = buffer->out_info; |
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211 |
hb_glyph_info_t tone = info[end]; |
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212 |
memmove (&info[start + 1], &info[start], (end - start) * sizeof (hb_glyph_info_t)); |
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213 |
info[start] = tone; |
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214 |
} |
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215 |
} |
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216 |
else |
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217 |
{ |
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218 |
/* No valid syllable as base for tone mark; try to insert dotted circle. */ |
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219 |
if (font->has_glyph (0x25CCu)) |
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220 |
{ |
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221 |
hb_codepoint_t chars[2]; |
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222 |
if (!is_zero_width_char (font, u)) { |
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223 |
chars[0] = u; |
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224 |
chars[1] = 0x25CCu; |
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225 |
} else { |
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226 |
chars[0] = 0x25CCu; |
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227 |
chars[1] = u; |
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228 |
} |
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229 |
buffer->replace_glyphs (1, 2, chars); |
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230 |
} |
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231 |
else |
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232 |
{ |
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233 |
/* No dotted circle available in the font; just leave tone mark untouched. */ |
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234 |
buffer->next_glyph (); |
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235 |
} |
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236 |
} |
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237 |
start = end = buffer->out_len; |
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238 |
continue; |
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239 |
} |
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240 |
|
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241 |
start = buffer->out_len; /* Remember current position as a potential syllable start; |
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242 |
* will only be used if we set end to a later position. |
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243 |
*/ |
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244 |
|
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245 |
if (isL (u) && buffer->idx + 1 < count) |
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246 |
{ |
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247 |
hb_codepoint_t l = u; |
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248 |
hb_codepoint_t v = buffer->cur(+1).codepoint; |
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249 |
if (isV (v)) |
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250 |
{ |
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251 |
/* Have <L,V> or <L,V,T>. */ |
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|
252 |
hb_codepoint_t t = 0; |
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|
253 |
unsigned int tindex = 0; |
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diff
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|
254 |
if (buffer->idx + 2 < count) |
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|
255 |
{ |
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|
256 |
t = buffer->cur(+2).codepoint; |
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|
257 |
if (isT (t)) |
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diff
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|
258 |
tindex = t - TBase; /* Only used if isCombiningT (t); otherwise invalid. */ |
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|
259 |
else |
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|
260 |
t = 0; /* The next character was not a trailing jamo. */ |
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|
261 |
} |
48274 | 262 |
buffer->unsafe_to_break (buffer->idx, buffer->idx + (t ? 3 : 2)); |
34414
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|
263 |
|
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|
264 |
/* We've got a syllable <L,V,T?>; see if it can potentially be composed. */ |
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|
265 |
if (isCombiningL (l) && isCombiningV (v) && (t == 0 || isCombiningT (t))) |
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|
266 |
{ |
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|
267 |
/* Try to compose; if this succeeds, end is set to start+1. */ |
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|
268 |
hb_codepoint_t s = SBase + (l - LBase) * NCount + (v - VBase) * TCount + tindex; |
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|
269 |
if (font->has_glyph (s)) |
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|
270 |
{ |
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|
271 |
buffer->replace_glyphs (t ? 3 : 2, 1, &s); |
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|
272 |
if (unlikely (buffer->in_error)) |
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|
273 |
return; |
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parents:
diff
changeset
|
274 |
end = start + 1; |
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parents:
diff
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|
275 |
continue; |
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parents:
diff
changeset
|
276 |
} |
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|
277 |
} |
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changeset
|
278 |
|
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diff
changeset
|
279 |
/* We didn't compose, either because it's an Old Hangul syllable without a |
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diff
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|
280 |
* precomposed character in Unicode, or because the font didn't support the |
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diff
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|
281 |
* necessary precomposed glyph. |
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diff
changeset
|
282 |
* Set jamo features on the individual glyphs, and advance past them. |
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|
283 |
*/ |
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changeset
|
284 |
buffer->cur().hangul_shaping_feature() = LJMO; |
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parents:
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changeset
|
285 |
buffer->next_glyph (); |
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parents:
diff
changeset
|
286 |
buffer->cur().hangul_shaping_feature() = VJMO; |
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parents:
diff
changeset
|
287 |
buffer->next_glyph (); |
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parents:
diff
changeset
|
288 |
if (t) |
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parents:
diff
changeset
|
289 |
{ |
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parents:
diff
changeset
|
290 |
buffer->cur().hangul_shaping_feature() = TJMO; |
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parents:
diff
changeset
|
291 |
buffer->next_glyph (); |
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prr
parents:
diff
changeset
|
292 |
end = start + 3; |
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prr
parents:
diff
changeset
|
293 |
} |
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prr
parents:
diff
changeset
|
294 |
else |
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parents:
diff
changeset
|
295 |
end = start + 2; |
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parents:
diff
changeset
|
296 |
if (buffer->cluster_level == HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES) |
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parents:
diff
changeset
|
297 |
buffer->merge_out_clusters (start, end); |
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parents:
diff
changeset
|
298 |
continue; |
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prr
parents:
diff
changeset
|
299 |
} |
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parents:
diff
changeset
|
300 |
} |
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parents:
diff
changeset
|
301 |
|
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prr
parents:
diff
changeset
|
302 |
else if (isCombinedS (u)) |
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parents:
diff
changeset
|
303 |
{ |
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prr
parents:
diff
changeset
|
304 |
/* Have <LV>, <LVT>, or <LV,T> */ |
e496a8d8fc8a
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parents:
diff
changeset
|
305 |
hb_codepoint_t s = u; |
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prr
parents:
diff
changeset
|
306 |
bool has_glyph = font->has_glyph (s); |
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parents:
diff
changeset
|
307 |
unsigned int lindex = (s - SBase) / NCount; |
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prr
parents:
diff
changeset
|
308 |
unsigned int nindex = (s - SBase) % NCount; |
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parents:
diff
changeset
|
309 |
unsigned int vindex = nindex / TCount; |
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parents:
diff
changeset
|
310 |
unsigned int tindex = nindex % TCount; |
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prr
parents:
diff
changeset
|
311 |
|
e496a8d8fc8a
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prr
parents:
diff
changeset
|
312 |
if (!tindex && |
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prr
parents:
diff
changeset
|
313 |
buffer->idx + 1 < count && |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
314 |
isCombiningT (buffer->cur(+1).codepoint)) |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
315 |
{ |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
316 |
/* <LV,T>, try to combine. */ |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
317 |
unsigned int new_tindex = buffer->cur(+1).codepoint - TBase; |
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parents:
diff
changeset
|
318 |
hb_codepoint_t new_s = s + new_tindex; |
e496a8d8fc8a
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parents:
diff
changeset
|
319 |
if (font->has_glyph (new_s)) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
320 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
321 |
buffer->replace_glyphs (2, 1, &new_s); |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
322 |
if (unlikely (buffer->in_error)) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
323 |
return; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
324 |
end = start + 1; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
325 |
continue; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
326 |
} |
48274 | 327 |
else |
328 |
buffer->unsafe_to_break (buffer->idx, buffer->idx + 2); /* Mark unsafe between LV and T. */ |
|
34414
e496a8d8fc8a
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prr
parents:
diff
changeset
|
329 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
330 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
331 |
/* Otherwise, decompose if font doesn't support <LV> or <LVT>, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
332 |
* or if having non-combining <LV,T>. Note that we already handled |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
333 |
* combining <LV,T> above. */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
334 |
if (!has_glyph || |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
335 |
(!tindex && |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
336 |
buffer->idx + 1 < count && |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
337 |
isT (buffer->cur(+1).codepoint))) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
338 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
339 |
hb_codepoint_t decomposed[3] = {LBase + lindex, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
340 |
VBase + vindex, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
341 |
TBase + tindex}; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
342 |
if (font->has_glyph (decomposed[0]) && |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
343 |
font->has_glyph (decomposed[1]) && |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
344 |
(!tindex || font->has_glyph (decomposed[2]))) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
345 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
346 |
unsigned int s_len = tindex ? 3 : 2; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
347 |
buffer->replace_glyphs (1, s_len, decomposed); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
348 |
if (unlikely (buffer->in_error)) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
349 |
return; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
350 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
351 |
/* We decomposed S: apply jamo features to the individual glyphs |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
352 |
* that are now in buffer->out_info. |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
353 |
*/ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
354 |
hb_glyph_info_t *info = buffer->out_info; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
355 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
356 |
/* If we decomposed an LV because of a non-combining T following, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
357 |
* we want to include this T in the syllable. |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
358 |
*/ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
359 |
if (has_glyph && !tindex) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
360 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
361 |
buffer->next_glyph (); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
362 |
s_len++; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
363 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
364 |
end = start + s_len; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
365 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
366 |
unsigned int i = start; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
367 |
info[i++].hangul_shaping_feature() = LJMO; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
368 |
info[i++].hangul_shaping_feature() = VJMO; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
369 |
if (i < end) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
370 |
info[i++].hangul_shaping_feature() = TJMO; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
371 |
if (buffer->cluster_level == HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
372 |
buffer->merge_out_clusters (start, end); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
373 |
continue; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
374 |
} |
48274 | 375 |
else if ((!tindex && buffer->idx + 1 < count && isT (buffer->cur(+1).codepoint))) |
376 |
buffer->unsafe_to_break (buffer->idx, buffer->idx + 2); /* Mark unsafe between LV and T. */ |
|
34414
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
377 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
378 |
|
e496a8d8fc8a
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prr
parents:
diff
changeset
|
379 |
if (has_glyph) |
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prr
parents:
diff
changeset
|
380 |
{ |
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prr
parents:
diff
changeset
|
381 |
/* We didn't decompose the S, so just advance past it. */ |
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parents:
diff
changeset
|
382 |
end = start + 1; |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
383 |
buffer->next_glyph (); |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
384 |
continue; |
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prr
parents:
diff
changeset
|
385 |
} |
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prr
parents:
diff
changeset
|
386 |
} |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
387 |
|
e496a8d8fc8a
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prr
parents:
diff
changeset
|
388 |
/* Didn't find a recognizable syllable, so we leave end <= start; |
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parents:
diff
changeset
|
389 |
* this will prevent tone-mark reordering happening. |
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prr
parents:
diff
changeset
|
390 |
*/ |
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prr
parents:
diff
changeset
|
391 |
buffer->next_glyph (); |
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prr
parents:
diff
changeset
|
392 |
} |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
393 |
buffer->swap_buffers (); |
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prr
parents:
diff
changeset
|
394 |
} |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
395 |
|
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prr
parents:
diff
changeset
|
396 |
static void |
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parents:
diff
changeset
|
397 |
setup_masks_hangul (const hb_ot_shape_plan_t *plan, |
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prr
parents:
diff
changeset
|
398 |
hb_buffer_t *buffer, |
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prr
parents:
diff
changeset
|
399 |
hb_font_t *font HB_UNUSED) |
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prr
parents:
diff
changeset
|
400 |
{ |
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prr
parents:
diff
changeset
|
401 |
const hangul_shape_plan_t *hangul_plan = (const hangul_shape_plan_t *) plan->data; |
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prr
parents:
diff
changeset
|
402 |
|
e496a8d8fc8a
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prr
parents:
diff
changeset
|
403 |
if (likely (hangul_plan)) |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
404 |
{ |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
405 |
unsigned int count = buffer->len; |
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prr
parents:
diff
changeset
|
406 |
hb_glyph_info_t *info = buffer->info; |
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prr
parents:
diff
changeset
|
407 |
for (unsigned int i = 0; i < count; i++, info++) |
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parents:
diff
changeset
|
408 |
info->mask |= hangul_plan->mask_array[info->hangul_shaping_feature()]; |
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prr
parents:
diff
changeset
|
409 |
} |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
410 |
|
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prr
parents:
diff
changeset
|
411 |
HB_BUFFER_DEALLOCATE_VAR (buffer, hangul_shaping_feature); |
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prr
parents:
diff
changeset
|
412 |
} |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
413 |
|
e496a8d8fc8a
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prr
parents:
diff
changeset
|
414 |
|
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prr
parents:
diff
changeset
|
415 |
const hb_ot_complex_shaper_t _hb_ot_complex_shaper_hangul = |
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prr
parents:
diff
changeset
|
416 |
{ |
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prr
parents:
diff
changeset
|
417 |
collect_features_hangul, |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
418 |
override_features_hangul, |
40435 | 419 |
data_create_hangul, |
420 |
data_destroy_hangul, |
|
34414
e496a8d8fc8a
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prr
parents:
diff
changeset
|
421 |
preprocess_text_hangul, |
48274 | 422 |
nullptr, /* postprocess_glyphs */ |
34414
e496a8d8fc8a
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prr
parents:
diff
changeset
|
423 |
HB_OT_SHAPE_NORMALIZATION_MODE_NONE, |
48274 | 424 |
nullptr, /* decompose */ |
425 |
nullptr, /* compose */ |
|
40435 | 426 |
setup_masks_hangul, |
48274 | 427 |
nullptr, /* disable_otl */ |
428 |
nullptr, /* reorder_marks */ |
|
34414
e496a8d8fc8a
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prr
parents:
diff
changeset
|
429 |
HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE, |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
430 |
false, /* fallback_position */ |
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prr
parents:
diff
changeset
|
431 |
}; |