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Diffstat (limited to 'gfx/graphite2/src/gr_segment.cpp')
| -rw-r--r-- | gfx/graphite2/src/gr_segment.cpp | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/gfx/graphite2/src/gr_segment.cpp b/gfx/graphite2/src/gr_segment.cpp new file mode 100644 index 000000000..0ab7a0854 --- /dev/null +++ b/gfx/graphite2/src/gr_segment.cpp @@ -0,0 +1,170 @@ +/* GRAPHITE2 LICENSING + + Copyright 2010, SIL International + All rights reserved. + + This library is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should also have received a copy of the GNU Lesser General Public + License along with this library in the file named "LICENSE". + If not, write to the Free Software Foundation, 51 Franklin Street, + Suite 500, Boston, MA 02110-1335, USA or visit their web page on the + internet at http://www.fsf.org/licenses/lgpl.html. + +Alternatively, the contents of this file may be used under the terms of the +Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public +License, as published by the Free Software Foundation, either version 2 +of the License or (at your option) any later version. +*/ +#include "graphite2/Segment.h" +#include "inc/UtfCodec.h" +#include "inc/Segment.h" + +using namespace graphite2; + +namespace +{ + + 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) + { + if (script == 0x20202020) script = 0; + else if ((script & 0x00FFFFFF) == 0x00202020) script = script & 0xFF000000; + else if ((script & 0x0000FFFF) == 0x00002020) script = script & 0xFFFF0000; + else if ((script & 0x000000FF) == 0x00000020) script = script & 0xFFFFFF00; + // if (!font) return NULL; + Segment* pRes=new Segment(nChars, face, script, dir); + + + if (!pRes->read_text(face, pFeats, enc, pStart, nChars) || !pRes->runGraphite()) + { + delete pRes; + return NULL; + } + pRes->finalise(font, true); + + return static_cast<gr_segment*>(pRes); + } + + +} + + +template <typename utf_iter> +inline size_t count_unicode_chars(utf_iter first, const utf_iter last, const void **error) +{ + size_t n_chars = 0; + uint32 usv = 0; + + if (last) + { + for (;first != last; ++first, ++n_chars) + if ((usv = *first) == 0 || first.error()) break; + } + else + { + while ((usv = *first) != 0 && !first.error()) + { + ++first; + ++n_chars; + } + } + + if (error) *error = first.error() ? first : 0; + return n_chars; +} + +extern "C" { + +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 +{ + assert(buffer_begin); + + switch (enc) + { + case gr_utf8: return count_unicode_chars<utf8::const_iterator>(buffer_begin, buffer_end, pError); break; + case gr_utf16: return count_unicode_chars<utf16::const_iterator>(buffer_begin, buffer_end, pError); break; + case gr_utf32: return count_unicode_chars<utf32::const_iterator>(buffer_begin, buffer_end, pError); break; + default: return 0; + } +} + + +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) +{ + const gr_feature_val * tmp_feats = 0; + if (pFeats == 0) + pFeats = tmp_feats = static_cast<const gr_feature_val*>(face->theSill().cloneFeatures(0)); + gr_segment * seg = makeAndInitialize(font, face, script, pFeats, enc, pStart, nChars, dir); + delete tmp_feats; + + return seg; +} + + +void gr_seg_destroy(gr_segment* p) +{ + delete p; +} + + +float gr_seg_advance_X(const gr_segment* pSeg/*not NULL*/) +{ + assert(pSeg); + return pSeg->advance().x; +} + + +float gr_seg_advance_Y(const gr_segment* pSeg/*not NULL*/) +{ + assert(pSeg); + return pSeg->advance().y; +} + + +unsigned int gr_seg_n_cinfo(const gr_segment* pSeg/*not NULL*/) +{ + assert(pSeg); + return pSeg->charInfoCount(); +} + + +const gr_char_info* gr_seg_cinfo(const gr_segment* pSeg/*not NULL*/, unsigned int index/*must be <number_of_CharInfo*/) +{ + assert(pSeg); + return static_cast<const gr_char_info*>(pSeg->charinfo(index)); +} + +unsigned int gr_seg_n_slots(const gr_segment* pSeg/*not NULL*/) +{ + assert(pSeg); + return pSeg->slotCount(); +} + +const gr_slot* gr_seg_first_slot(gr_segment* pSeg/*not NULL*/) +{ + assert(pSeg); + return static_cast<const gr_slot*>(pSeg->first()); +} + +const gr_slot* gr_seg_last_slot(gr_segment* pSeg/*not NULL*/) +{ + assert(pSeg); + return static_cast<const gr_slot*>(pSeg->last()); +} + +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) +{ + assert(pSeg); + assert(pSlot); + return pSeg->justify(const_cast<gr_slot *>(pSlot), pFont, float(width), justFlags(flags), const_cast<gr_slot *>(pFirst), const_cast<gr_slot *>(pLast)); +} + +} // extern "C" |