author | prr |
Thu, 21 Jun 2018 12:54:30 -0700 | |
changeset 50826 | f5b95be8b6e2 |
parent 50352 | 25db2c8f3cf8 |
child 54232 | 7c11a7cc7c1d |
permissions | -rw-r--r-- |
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/* |
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* Copyright © 2007,2008,2009 Red Hat, Inc. |
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* Copyright © 2010,2011,2012 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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* Red Hat Author(s): Behdad Esfahbod |
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* Google Author(s): Behdad Esfahbod |
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*/ |
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#ifndef HB_OT_LAYOUT_GDEF_TABLE_HH |
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#define HB_OT_LAYOUT_GDEF_TABLE_HH |
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#include "hb-ot-layout-common-private.hh" |
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#include "hb-font-private.hh" |
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namespace OT { |
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/* |
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* Attachment List Table |
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*/ |
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typedef ArrayOf<HBUINT16> AttachPoint; /* Array of contour point indices--in |
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* increasing numerical order */ |
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struct AttachList |
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{ |
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inline unsigned int get_attach_points (hb_codepoint_t glyph_id, |
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unsigned int start_offset, |
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unsigned int *point_count /* IN/OUT */, |
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unsigned int *point_array /* OUT */) const |
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{ |
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unsigned int index = (this+coverage).get_coverage (glyph_id); |
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if (index == NOT_COVERED) |
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{ |
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if (point_count) |
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*point_count = 0; |
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return 0; |
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} |
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const AttachPoint &points = this+attachPoint[index]; |
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if (point_count) { |
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const HBUINT16 *array = points.sub_array (start_offset, point_count); |
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unsigned int count = *point_count; |
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for (unsigned int i = 0; i < count; i++) |
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point_array[i] = array[i]; |
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} |
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return points.len; |
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} |
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inline bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (coverage.sanitize (c, this) && attachPoint.sanitize (c, this)); |
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} |
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protected: |
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OffsetTo<Coverage> |
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coverage; /* Offset to Coverage table -- from |
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* beginning of AttachList table */ |
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OffsetArrayOf<AttachPoint> |
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attachPoint; /* Array of AttachPoint tables |
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* in Coverage Index order */ |
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public: |
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DEFINE_SIZE_ARRAY (4, attachPoint); |
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}; |
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/* |
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* Ligature Caret Table |
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*/ |
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struct CaretValueFormat1 |
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{ |
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friend struct CaretValue; |
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private: |
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inline hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction) const |
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{ |
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return HB_DIRECTION_IS_HORIZONTAL (direction) ? font->em_scale_x (coordinate) : font->em_scale_y (coordinate); |
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} |
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inline bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (c->check_struct (this)); |
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} |
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protected: |
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HBUINT16 caretValueFormat; /* Format identifier--format = 1 */ |
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FWORD coordinate; /* X or Y value, in design units */ |
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public: |
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DEFINE_SIZE_STATIC (4); |
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}; |
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struct CaretValueFormat2 |
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{ |
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friend struct CaretValue; |
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private: |
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inline hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction, hb_codepoint_t glyph_id) const |
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{ |
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hb_position_t x, y; |
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if (font->get_glyph_contour_point_for_origin (glyph_id, caretValuePoint, direction, &x, &y)) |
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return HB_DIRECTION_IS_HORIZONTAL (direction) ? x : y; |
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else |
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return 0; |
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130 |
} |
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131 |
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inline bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (c->check_struct (this)); |
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} |
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137 |
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138 |
protected: |
50352 | 139 |
HBUINT16 caretValueFormat; /* Format identifier--format = 2 */ |
140 |
HBUINT16 caretValuePoint; /* Contour point index on glyph */ |
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public: |
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DEFINE_SIZE_STATIC (4); |
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143 |
}; |
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144 |
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struct CaretValueFormat3 |
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{ |
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friend struct CaretValue; |
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148 |
|
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inline hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction, const VariationStore &var_store) const |
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150 |
{ |
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return HB_DIRECTION_IS_HORIZONTAL (direction) ? |
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font->em_scale_x (coordinate) + (this+deviceTable).get_x_delta (font, var_store) : |
153 |
font->em_scale_y (coordinate) + (this+deviceTable).get_y_delta (font, var_store); |
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} |
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155 |
|
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inline bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (c->check_struct (this) && deviceTable.sanitize (c, this)); |
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} |
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161 |
|
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protected: |
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HBUINT16 caretValueFormat; /* Format identifier--format = 3 */ |
164 |
FWORD coordinate; /* X or Y value, in design units */ |
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OffsetTo<Device> |
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deviceTable; /* Offset to Device table for X or Y |
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* value--from beginning of CaretValue |
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* table */ |
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public: |
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DEFINE_SIZE_STATIC (6); |
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171 |
}; |
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172 |
|
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struct CaretValue |
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174 |
{ |
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inline hb_position_t get_caret_value (hb_font_t *font, |
176 |
hb_direction_t direction, |
|
177 |
hb_codepoint_t glyph_id, |
|
178 |
const VariationStore &var_store) const |
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179 |
{ |
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switch (u.format) { |
43232 | 181 |
case 1: return u.format1.get_caret_value (font, direction); |
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182 |
case 2: return u.format2.get_caret_value (font, direction, glyph_id); |
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case 3: return u.format3.get_caret_value (font, direction, var_store); |
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default:return 0; |
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185 |
} |
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186 |
} |
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187 |
|
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188 |
inline bool sanitize (hb_sanitize_context_t *c) const |
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189 |
{ |
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190 |
TRACE_SANITIZE (this); |
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191 |
if (!u.format.sanitize (c)) return_trace (false); |
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192 |
switch (u.format) { |
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193 |
case 1: return_trace (u.format1.sanitize (c)); |
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194 |
case 2: return_trace (u.format2.sanitize (c)); |
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195 |
case 3: return_trace (u.format3.sanitize (c)); |
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196 |
default:return_trace (true); |
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197 |
} |
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198 |
} |
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199 |
|
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200 |
protected: |
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201 |
union { |
50352 | 202 |
HBUINT16 format; /* Format identifier */ |
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203 |
CaretValueFormat1 format1; |
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204 |
CaretValueFormat2 format2; |
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205 |
CaretValueFormat3 format3; |
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206 |
} u; |
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207 |
public: |
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208 |
DEFINE_SIZE_UNION (2, format); |
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209 |
}; |
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210 |
|
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211 |
struct LigGlyph |
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212 |
{ |
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213 |
inline unsigned int get_lig_carets (hb_font_t *font, |
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214 |
hb_direction_t direction, |
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215 |
hb_codepoint_t glyph_id, |
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const VariationStore &var_store, |
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217 |
unsigned int start_offset, |
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218 |
unsigned int *caret_count /* IN/OUT */, |
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219 |
hb_position_t *caret_array /* OUT */) const |
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220 |
{ |
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221 |
if (caret_count) { |
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222 |
const OffsetTo<CaretValue> *array = carets.sub_array (start_offset, caret_count); |
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223 |
unsigned int count = *caret_count; |
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224 |
for (unsigned int i = 0; i < count; i++) |
43232 | 225 |
caret_array[i] = (this+array[i]).get_caret_value (font, direction, glyph_id, var_store); |
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226 |
} |
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227 |
|
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228 |
return carets.len; |
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229 |
} |
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230 |
|
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231 |
inline bool sanitize (hb_sanitize_context_t *c) const |
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232 |
{ |
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233 |
TRACE_SANITIZE (this); |
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234 |
return_trace (carets.sanitize (c, this)); |
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235 |
} |
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236 |
|
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237 |
protected: |
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238 |
OffsetArrayOf<CaretValue> |
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239 |
carets; /* Offset array of CaretValue tables |
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240 |
* --from beginning of LigGlyph table |
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241 |
* --in increasing coordinate order */ |
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242 |
public: |
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243 |
DEFINE_SIZE_ARRAY (2, carets); |
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244 |
}; |
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245 |
|
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246 |
struct LigCaretList |
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247 |
{ |
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248 |
inline unsigned int get_lig_carets (hb_font_t *font, |
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249 |
hb_direction_t direction, |
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250 |
hb_codepoint_t glyph_id, |
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const VariationStore &var_store, |
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252 |
unsigned int start_offset, |
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253 |
unsigned int *caret_count /* IN/OUT */, |
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254 |
hb_position_t *caret_array /* OUT */) const |
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255 |
{ |
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256 |
unsigned int index = (this+coverage).get_coverage (glyph_id); |
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257 |
if (index == NOT_COVERED) |
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258 |
{ |
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259 |
if (caret_count) |
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260 |
*caret_count = 0; |
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261 |
return 0; |
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262 |
} |
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263 |
const LigGlyph &lig_glyph = this+ligGlyph[index]; |
43232 | 264 |
return lig_glyph.get_lig_carets (font, direction, glyph_id, var_store, start_offset, caret_count, caret_array); |
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265 |
} |
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266 |
|
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inline bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (coverage.sanitize (c, this) && ligGlyph.sanitize (c, this)); |
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} |
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protected: |
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OffsetTo<Coverage> |
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coverage; /* Offset to Coverage table--from |
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* beginning of LigCaretList table */ |
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OffsetArrayOf<LigGlyph> |
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ligGlyph; /* Array of LigGlyph tables |
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* in Coverage Index order */ |
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public: |
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DEFINE_SIZE_ARRAY (4, ligGlyph); |
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}; |
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283 |
|
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284 |
|
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struct MarkGlyphSetsFormat1 |
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286 |
{ |
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287 |
inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const |
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{ return (this+coverage[set_index]).get_coverage (glyph_id) != NOT_COVERED; } |
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289 |
|
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inline bool sanitize (hb_sanitize_context_t *c) const |
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291 |
{ |
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292 |
TRACE_SANITIZE (this); |
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293 |
return_trace (coverage.sanitize (c, this)); |
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294 |
} |
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295 |
|
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296 |
protected: |
50352 | 297 |
HBUINT16 format; /* Format identifier--format = 1 */ |
48274 | 298 |
ArrayOf<LOffsetTo<Coverage> > |
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coverage; /* Array of long offsets to mark set |
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300 |
* coverage tables */ |
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301 |
public: |
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302 |
DEFINE_SIZE_ARRAY (4, coverage); |
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303 |
}; |
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304 |
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305 |
struct MarkGlyphSets |
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306 |
{ |
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307 |
inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const |
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308 |
{ |
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switch (u.format) { |
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310 |
case 1: return u.format1.covers (set_index, glyph_id); |
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311 |
default:return false; |
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312 |
} |
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313 |
} |
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314 |
|
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315 |
inline bool sanitize (hb_sanitize_context_t *c) const |
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316 |
{ |
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317 |
TRACE_SANITIZE (this); |
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318 |
if (!u.format.sanitize (c)) return_trace (false); |
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319 |
switch (u.format) { |
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320 |
case 1: return_trace (u.format1.sanitize (c)); |
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321 |
default:return_trace (true); |
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322 |
} |
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323 |
} |
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324 |
|
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325 |
protected: |
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326 |
union { |
50352 | 327 |
HBUINT16 format; /* Format identifier */ |
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328 |
MarkGlyphSetsFormat1 format1; |
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329 |
} u; |
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330 |
public: |
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331 |
DEFINE_SIZE_UNION (2, format); |
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332 |
}; |
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333 |
|
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334 |
|
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335 |
/* |
50826 | 336 |
* GDEF -- Glyph Definition |
337 |
* https://docs.microsoft.com/en-us/typography/opentype/spec/gdef |
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338 |
*/ |
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339 |
|
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340 |
struct GDEF |
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341 |
{ |
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342 |
static const hb_tag_t tableTag = HB_OT_TAG_GDEF; |
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343 |
|
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344 |
enum GlyphClasses { |
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UnclassifiedGlyph = 0, |
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346 |
BaseGlyph = 1, |
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347 |
LigatureGlyph = 2, |
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348 |
MarkGlyph = 3, |
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ComponentGlyph = 4 |
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350 |
}; |
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351 |
|
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352 |
inline bool has_glyph_classes (void) const { return glyphClassDef != 0; } |
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353 |
inline unsigned int get_glyph_class (hb_codepoint_t glyph) const |
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354 |
{ return (this+glyphClassDef).get_class (glyph); } |
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355 |
inline void get_glyphs_in_class (unsigned int klass, hb_set_t *glyphs) const |
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356 |
{ (this+glyphClassDef).add_class (glyphs, klass); } |
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357 |
|
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358 |
inline bool has_mark_attachment_types (void) const { return markAttachClassDef != 0; } |
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359 |
inline unsigned int get_mark_attachment_type (hb_codepoint_t glyph) const |
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360 |
{ return (this+markAttachClassDef).get_class (glyph); } |
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361 |
|
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362 |
inline bool has_attach_points (void) const { return attachList != 0; } |
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363 |
inline unsigned int get_attach_points (hb_codepoint_t glyph_id, |
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364 |
unsigned int start_offset, |
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365 |
unsigned int *point_count /* IN/OUT */, |
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366 |
unsigned int *point_array /* OUT */) const |
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367 |
{ return (this+attachList).get_attach_points (glyph_id, start_offset, point_count, point_array); } |
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368 |
|
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369 |
inline bool has_lig_carets (void) const { return ligCaretList != 0; } |
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370 |
inline unsigned int get_lig_carets (hb_font_t *font, |
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371 |
hb_direction_t direction, |
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372 |
hb_codepoint_t glyph_id, |
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373 |
unsigned int start_offset, |
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374 |
unsigned int *caret_count /* IN/OUT */, |
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375 |
hb_position_t *caret_array /* OUT */) const |
43232 | 376 |
{ return (this+ligCaretList).get_lig_carets (font, |
377 |
direction, glyph_id, get_var_store(), |
|
378 |
start_offset, caret_count, caret_array); } |
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379 |
|
43232 | 380 |
inline bool has_mark_sets (void) const { return version.to_int () >= 0x00010002u && markGlyphSetsDef != 0; } |
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381 |
inline bool mark_set_covers (unsigned int set_index, hb_codepoint_t glyph_id) const |
43232 | 382 |
{ return version.to_int () >= 0x00010002u && (this+markGlyphSetsDef).covers (set_index, glyph_id); } |
383 |
||
384 |
inline bool has_var_store (void) const { return version.to_int () >= 0x00010003u && varStore != 0; } |
|
385 |
inline const VariationStore &get_var_store (void) const |
|
386 |
{ return version.to_int () >= 0x00010003u ? this+varStore : Null(VariationStore); } |
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387 |
|
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388 |
inline bool sanitize (hb_sanitize_context_t *c) const |
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389 |
{ |
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390 |
TRACE_SANITIZE (this); |
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391 |
return_trace (version.sanitize (c) && |
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392 |
likely (version.major == 1) && |
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393 |
glyphClassDef.sanitize (c, this) && |
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394 |
attachList.sanitize (c, this) && |
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395 |
ligCaretList.sanitize (c, this) && |
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396 |
markAttachClassDef.sanitize (c, this) && |
43232 | 397 |
(version.to_int () < 0x00010002u || markGlyphSetsDef.sanitize (c, this)) && |
398 |
(version.to_int () < 0x00010003u || varStore.sanitize (c, this))); |
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399 |
} |
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400 |
|
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/* glyph_props is a 16-bit integer where the lower 8-bit have bits representing |
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* glyph class and other bits, and high 8-bit gthe mark attachment type (if any). |
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* Not to be confused with lookup_props which is very similar. */ |
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inline unsigned int get_glyph_props (hb_codepoint_t glyph) const |
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{ |
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unsigned int klass = get_glyph_class (glyph); |
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407 |
|
48274 | 408 |
static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH == (unsigned int) LookupFlag::IgnoreBaseGlyphs), ""); |
409 |
static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE == (unsigned int) LookupFlag::IgnoreLigatures), ""); |
|
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static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_MARK == (unsigned int) LookupFlag::IgnoreMarks), ""); |
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411 |
|
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switch (klass) { |
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default: return 0; |
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case BaseGlyph: return HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH; |
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case LigatureGlyph: return HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE; |
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case MarkGlyph: |
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klass = get_mark_attachment_type (glyph); |
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return HB_OT_LAYOUT_GLYPH_PROPS_MARK | (klass << 8); |
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419 |
} |
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420 |
} |
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421 |
|
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422 |
|
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protected: |
40435 | 424 |
FixedVersion<>version; /* Version of the GDEF table--currently |
43232 | 425 |
* 0x00010003u */ |
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OffsetTo<ClassDef> |
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glyphClassDef; /* Offset to class definition table |
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* for glyph type--from beginning of |
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* GDEF header (may be Null) */ |
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430 |
OffsetTo<AttachList> |
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attachList; /* Offset to list of glyphs with |
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* attachment points--from beginning |
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* of GDEF header (may be Null) */ |
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OffsetTo<LigCaretList> |
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ligCaretList; /* Offset to list of positioning points |
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* for ligature carets--from beginning |
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* of GDEF header (may be Null) */ |
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OffsetTo<ClassDef> |
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markAttachClassDef; /* Offset to class definition table for |
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* mark attachment type--from beginning |
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* of GDEF header (may be Null) */ |
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OffsetTo<MarkGlyphSets> |
43232 | 443 |
markGlyphSetsDef; /* Offset to the table of mark set |
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* definitions--from beginning of GDEF |
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* header (may be NULL). Introduced |
43232 | 446 |
* in version 0x00010002. */ |
48274 | 447 |
LOffsetTo<VariationStore> |
43232 | 448 |
varStore; /* Offset to the table of Item Variation |
449 |
* Store--from beginning of GDEF |
|
450 |
* header (may be NULL). Introduced |
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* in version 0x00010003. */ |
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public: |
43232 | 453 |
DEFINE_SIZE_MIN (12); |
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}; |
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455 |
|
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456 |
|
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457 |
} /* namespace OT */ |
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458 |
|
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459 |
|
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#endif /* HB_OT_LAYOUT_GDEF_TABLE_HH */ |