gr_slot.cpp (4519B)
1 /* GRAPHITE2 LICENSING 2 3 Copyright 2010, SIL International 4 All rights reserved. 5 6 This library is free software; you can redistribute it and/or modify 7 it under the terms of the GNU Lesser General Public License as published 8 by the Free Software Foundation; either version 2.1 of License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should also have received a copy of the GNU Lesser General Public 17 License along with this library in the file named "LICENSE". 18 If not, write to the Free Software Foundation, 51 Franklin Street, 19 Suite 500, Boston, MA 02110-1335, USA or visit their web page on the 20 internet at http://www.fsf.org/licenses/lgpl.html. 21 22 Alternatively, the contents of this file may be used under the terms of the 23 Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public 24 License, as published by the Free Software Foundation, either version 2 25 of the License or (at your option) any later version. 26 */ 27 #include "graphite2/Segment.h" 28 #include "inc/Segment.h" 29 #include "inc/Slot.h" 30 #include "inc/Font.h" 31 32 33 extern "C" { 34 35 36 const gr_slot* gr_slot_next_in_segment(const gr_slot* p/*not NULL*/) 37 { 38 assert(p); 39 return static_cast<const gr_slot*>(p->next()); 40 } 41 42 const gr_slot* gr_slot_prev_in_segment(const gr_slot* p/*not NULL*/) 43 { 44 assert(p); 45 return static_cast<const gr_slot*>(p->prev()); 46 } 47 48 const gr_slot* gr_slot_attached_to(const gr_slot* p/*not NULL*/) //returns NULL iff base. If called repeatedly on result, will get to a base 49 { 50 assert(p); 51 return static_cast<const gr_slot*>(p->attachedTo()); 52 } 53 54 55 const gr_slot* gr_slot_first_attachment(const gr_slot* p/*not NULL*/) //returns NULL iff no attachments. 56 { //if slot_first_attachment(p) is not NULL, then slot_attached_to(slot_first_attachment(p))==p. 57 assert(p); 58 return static_cast<const gr_slot*>(p->firstChild()); 59 } 60 61 62 const gr_slot* gr_slot_next_sibling_attachment(const gr_slot* p/*not NULL*/) //returns NULL iff no more attachments. 63 { //if slot_next_sibling_attachment(p) is not NULL, then slot_attached_to(slot_next_sibling_attachment(p))==slot_attached_to(p). 64 assert(p); 65 return static_cast<const gr_slot*>(p->nextSibling()); 66 } 67 68 69 unsigned short gr_slot_gid(const gr_slot* p/*not NULL*/) 70 { 71 assert(p); 72 return p->glyph(); 73 } 74 75 76 float gr_slot_origin_X(const gr_slot* p/*not NULL*/) 77 { 78 assert(p); 79 return p->origin().x; 80 } 81 82 83 float gr_slot_origin_Y(const gr_slot* p/*not NULL*/) 84 { 85 assert(p); 86 return p->origin().y; 87 } 88 89 90 float gr_slot_advance_X(const gr_slot* p/*not NULL*/, const gr_face *face, const gr_font *font) 91 { 92 assert(p); 93 float scale = 1.0; 94 float res = p->advance(); 95 if (font) 96 { 97 scale = font->scale(); 98 int gid = p->glyph(); 99 if (face && font->isHinted() && gid < face->glyphs().numGlyphs()) 100 res = (res - face->glyphs().glyph(gid)->theAdvance().x) * scale + font->advance(gid); 101 else 102 res = res * scale; 103 } 104 return res; 105 } 106 107 float gr_slot_advance_Y(const gr_slot *p/*not NULL*/, GR_MAYBE_UNUSED const gr_face *face, const gr_font *font) 108 { 109 assert(p); 110 float res = p->advancePos().y; 111 if (font) 112 return res * font->scale(); 113 else 114 return res; 115 } 116 117 int gr_slot_before(const gr_slot* p/*not NULL*/) 118 { 119 assert(p); 120 return p->before(); 121 } 122 123 124 int gr_slot_after(const gr_slot* p/*not NULL*/) 125 { 126 assert(p); 127 return p->after(); 128 } 129 130 unsigned int gr_slot_index(const gr_slot *p/*not NULL*/) 131 { 132 assert(p); 133 return p->index(); 134 } 135 136 int gr_slot_attr(const gr_slot* p/*not NULL*/, const gr_segment* pSeg/*not NULL*/, gr_attrCode index, gr_uint8 subindex) 137 { 138 assert(p); 139 return p->getAttr(pSeg, index, subindex); 140 } 141 142 143 int gr_slot_can_insert_before(const gr_slot* p/*not NULL*/) 144 { 145 assert(p); 146 return (p->isInsertBefore())? 1 : 0; 147 } 148 149 150 int gr_slot_original(const gr_slot* p/*not NULL*/) 151 { 152 assert(p); 153 return p->original(); 154 } 155 156 void gr_slot_linebreak_before(gr_slot* p/*not NULL*/) 157 { 158 assert(p); 159 gr_slot *prev = (gr_slot *)p->prev(); 160 prev->sibling(NULL); 161 prev->next(NULL); 162 p->prev(NULL); 163 } 164 165 #if 0 //what should this be 166 size_t id(const gr_slot* p/*not NULL*/) 167 { 168 return (size_t)p->id(); 169 } 170 #endif 171 172 173 } // extern "C"