1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/graphite2/src/gr_segment.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,174 @@
1.4 +/* GRAPHITE2 LICENSING
1.5 +
1.6 + Copyright 2010, SIL International
1.7 + All rights reserved.
1.8 +
1.9 + This library is free software; you can redistribute it and/or modify
1.10 + it under the terms of the GNU Lesser General Public License as published
1.11 + by the Free Software Foundation; either version 2.1 of License, or
1.12 + (at your option) any later version.
1.13 +
1.14 + This program is distributed in the hope that it will be useful,
1.15 + but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1.17 + Lesser General Public License for more details.
1.18 +
1.19 + You should also have received a copy of the GNU Lesser General Public
1.20 + License along with this library in the file named "LICENSE".
1.21 + If not, write to the Free Software Foundation, 51 Franklin Street,
1.22 + Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
1.23 + internet at http://www.fsf.org/licenses/lgpl.html.
1.24 +
1.25 +Alternatively, the contents of this file may be used under the terms of the
1.26 +Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
1.27 +License, as published by the Free Software Foundation, either version 2
1.28 +of the License or (at your option) any later version.
1.29 +*/
1.30 +#include "graphite2/Segment.h"
1.31 +#include "inc/UtfCodec.h"
1.32 +#include "inc/Segment.h"
1.33 +
1.34 +using namespace graphite2;
1.35 +
1.36 +namespace
1.37 +{
1.38 +
1.39 + gr_segment* makeAndInitialize(const Font *font, const Face *face, uint32 script, const Features* pFeats/*must not be NULL*/, gr_encform enc, const void* pStart, size_t nChars, int dir)
1.40 + {
1.41 + if (script == 0x20202020) script = 0;
1.42 + else if ((script & 0x00FFFFFF) == 0x00202020) script = script & 0xFF000000;
1.43 + else if ((script & 0x0000FFFF) == 0x00002020) script = script & 0xFFFF0000;
1.44 + else if ((script & 0x000000FF) == 0x00000020) script = script & 0xFFFFFF00;
1.45 + // if (!font) return NULL;
1.46 + Segment* pRes=new Segment(nChars, face, script, dir);
1.47 +
1.48 +
1.49 + if (!pRes->read_text(face, pFeats, enc, pStart, nChars) || !pRes->runGraphite())
1.50 + {
1.51 + delete pRes;
1.52 + return NULL;
1.53 + }
1.54 + // run the line break passes
1.55 + // run the substitution passes
1.56 + pRes->prepare_pos(font);
1.57 + // run the positioning passes
1.58 + pRes->finalise(font);
1.59 +
1.60 + return static_cast<gr_segment*>(pRes);
1.61 + }
1.62 +
1.63 +
1.64 +}
1.65 +
1.66 +
1.67 +template <typename utf_iter>
1.68 +inline size_t count_unicode_chars(utf_iter first, const utf_iter last, const void **error)
1.69 +{
1.70 + size_t n_chars = 0;
1.71 + uint32 usv = 0;
1.72 +
1.73 + if (last)
1.74 + {
1.75 + for (;first != last; ++first, ++n_chars)
1.76 + if ((usv = *first) == 0 || first.error()) break;
1.77 + }
1.78 + else
1.79 + {
1.80 + while ((usv = *first) != 0 && !first.error())
1.81 + {
1.82 + ++first;
1.83 + ++n_chars;
1.84 + }
1.85 + }
1.86 +
1.87 + if (error) *error = first.error() ? first : 0;
1.88 + return n_chars;
1.89 +}
1.90 +
1.91 +extern "C" {
1.92 +
1.93 +size_t gr_count_unicode_characters(gr_encform enc, const void* buffer_begin, const void* buffer_end/*don't go on or past end, If NULL then ignored*/, const void** pError) //Also stops on nul. Any nul is not in the count
1.94 +{
1.95 + assert(buffer_begin);
1.96 +
1.97 + switch (enc)
1.98 + {
1.99 + case gr_utf8: return count_unicode_chars<utf8::const_iterator>(buffer_begin, buffer_end, pError); break;
1.100 + case gr_utf16: return count_unicode_chars<utf16::const_iterator>(buffer_begin, buffer_end, pError); break;
1.101 + case gr_utf32: return count_unicode_chars<utf32::const_iterator>(buffer_begin, buffer_end, pError); break;
1.102 + default: return 0;
1.103 + }
1.104 +}
1.105 +
1.106 +
1.107 +gr_segment* gr_make_seg(const gr_font *font, const gr_face *face, gr_uint32 script, const gr_feature_val* pFeats, gr_encform enc, const void* pStart, size_t nChars, int dir)
1.108 +{
1.109 + const gr_feature_val * tmp_feats = 0;
1.110 + if (pFeats == 0)
1.111 + pFeats = tmp_feats = static_cast<const gr_feature_val*>(face->theSill().cloneFeatures(0));
1.112 + gr_segment * seg = makeAndInitialize(font, face, script, pFeats, enc, pStart, nChars, dir);
1.113 + delete tmp_feats;
1.114 +
1.115 + return seg;
1.116 +}
1.117 +
1.118 +
1.119 +void gr_seg_destroy(gr_segment* p)
1.120 +{
1.121 + delete p;
1.122 +}
1.123 +
1.124 +
1.125 +float gr_seg_advance_X(const gr_segment* pSeg/*not NULL*/)
1.126 +{
1.127 + assert(pSeg);
1.128 + return pSeg->advance().x;
1.129 +}
1.130 +
1.131 +
1.132 +float gr_seg_advance_Y(const gr_segment* pSeg/*not NULL*/)
1.133 +{
1.134 + assert(pSeg);
1.135 + return pSeg->advance().y;
1.136 +}
1.137 +
1.138 +
1.139 +unsigned int gr_seg_n_cinfo(const gr_segment* pSeg/*not NULL*/)
1.140 +{
1.141 + assert(pSeg);
1.142 + return pSeg->charInfoCount();
1.143 +}
1.144 +
1.145 +
1.146 +const gr_char_info* gr_seg_cinfo(const gr_segment* pSeg/*not NULL*/, unsigned int index/*must be <number_of_CharInfo*/)
1.147 +{
1.148 + assert(pSeg);
1.149 + return static_cast<const gr_char_info*>(pSeg->charinfo(index));
1.150 +}
1.151 +
1.152 +unsigned int gr_seg_n_slots(const gr_segment* pSeg/*not NULL*/)
1.153 +{
1.154 + assert(pSeg);
1.155 + return pSeg->slotCount();
1.156 +}
1.157 +
1.158 +const gr_slot* gr_seg_first_slot(gr_segment* pSeg/*not NULL*/)
1.159 +{
1.160 + assert(pSeg);
1.161 + return static_cast<const gr_slot*>(pSeg->first());
1.162 +}
1.163 +
1.164 +const gr_slot* gr_seg_last_slot(gr_segment* pSeg/*not NULL*/)
1.165 +{
1.166 + assert(pSeg);
1.167 + return static_cast<const gr_slot*>(pSeg->last());
1.168 +}
1.169 +
1.170 +float gr_seg_justify(gr_segment* pSeg/*not NULL*/, const gr_slot* pSlot/*not NULL*/, const gr_font *pFont, double width, enum gr_justFlags flags, const gr_slot *pFirst, const gr_slot *pLast)
1.171 +{
1.172 + assert(pSeg);
1.173 + assert(pSlot);
1.174 + return pSeg->justify(const_cast<gr_slot *>(pSlot), pFont, float(width), justFlags(flags), const_cast<gr_slot *>(pFirst), const_cast<gr_slot *>(pLast));
1.175 +}
1.176 +
1.177 +} // extern "C"
