mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
147 lines
5.3 KiB
C++
147 lines
5.3 KiB
C++
/* 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.
|
|
*/
|
|
|
|
#ifndef GRAPHITE2_NSEGCACHE
|
|
|
|
#include <graphite2/Segment.h>
|
|
#include "inc/CachedFace.h"
|
|
#include "inc/SegCacheStore.h"
|
|
|
|
|
|
using namespace graphite2;
|
|
|
|
CachedFace::CachedFace(const void* appFaceHandle/*non-NULL*/, gr_get_table_fn getTable2)
|
|
: Face(appFaceHandle, getTable2), m_cacheStore(0)
|
|
{
|
|
}
|
|
|
|
CachedFace::~CachedFace()
|
|
{
|
|
delete m_cacheStore;
|
|
}
|
|
|
|
bool CachedFace::setupCache(unsigned int cacheSize)
|
|
{
|
|
m_cacheStore = new SegCacheStore(this, m_numSilf, cacheSize);
|
|
return (m_cacheStore != NULL);
|
|
}
|
|
|
|
|
|
bool CachedFace::runGraphite(Segment *seg, const Silf *pSilf) const
|
|
{
|
|
assert(pSilf);
|
|
pSilf->runGraphite(seg, 0, pSilf->substitutionPass());
|
|
|
|
SegCache * segCache = NULL;
|
|
unsigned int silfIndex = 0;
|
|
|
|
for (unsigned int i = 0; i < m_numSilf; i++)
|
|
{
|
|
if (&(m_silfs[i]) == pSilf)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
assert(silfIndex < m_numSilf);
|
|
assert(m_cacheStore);
|
|
segCache = m_cacheStore->getOrCreate(silfIndex, seg->getFeatures(0));
|
|
// find where the segment can be broken
|
|
Slot * subSegStartSlot = seg->first();
|
|
Slot * subSegEndSlot = subSegStartSlot;
|
|
uint16 cmapGlyphs[eMaxSpliceSize];
|
|
int subSegStart = 0;
|
|
bool spaceOnly = true;
|
|
for (unsigned int i = 0; i < seg->charInfoCount(); i++)
|
|
{
|
|
if (i - subSegStart < eMaxSpliceSize)
|
|
{
|
|
cmapGlyphs[i-subSegStart] = subSegEndSlot->gid();
|
|
}
|
|
if (!m_cacheStore->isSpaceGlyph(subSegEndSlot->gid()))
|
|
{
|
|
spaceOnly = false;
|
|
}
|
|
// at this stage the character to slot mapping is still 1 to 1
|
|
int breakWeight = seg->charinfo(i)->breakWeight();
|
|
int nextBreakWeight = (i + 1 < seg->charInfoCount())?
|
|
seg->charinfo(i+1)->breakWeight() : 0;
|
|
if (((breakWeight > 0) &&
|
|
(breakWeight <= gr_breakWord)) ||
|
|
(i + 1 == seg->charInfoCount()) ||
|
|
m_cacheStore->isSpaceGlyph(subSegEndSlot->gid()) ||
|
|
((i + 1 < seg->charInfoCount()) &&
|
|
(((nextBreakWeight < 0) &&
|
|
(nextBreakWeight >= gr_breakBeforeWord)) ||
|
|
(subSegEndSlot->next() && m_cacheStore->isSpaceGlyph(subSegEndSlot->next()->gid())))))
|
|
{
|
|
// record the next slot before any splicing
|
|
Slot * nextSlot = subSegEndSlot->next();
|
|
if (spaceOnly)
|
|
{
|
|
// spaces should be left untouched by graphite rules in any sane font
|
|
}
|
|
else
|
|
{
|
|
// found a break position, check for a cache of the sub sequence
|
|
const SegCacheEntry * entry = (segCache)?
|
|
segCache->find(cmapGlyphs, i - subSegStart + 1) : NULL;
|
|
// TODO disable cache for words at start/end of line with contextuals
|
|
if (!entry)
|
|
{
|
|
unsigned int length = i - subSegStart + 1;
|
|
SegmentScopeState scopeState = seg->setScope(subSegStartSlot, subSegEndSlot, length);
|
|
pSilf->runGraphite(seg, pSilf->substitutionPass(), pSilf->numPasses());
|
|
//entry =runGraphiteOnSubSeg(segCache, seg, cmapGlyphs,
|
|
// subSegStartSlot, subSegEndSlot,
|
|
// subSegStart, i - subSegStart + 1);
|
|
if ((length < eMaxSpliceSize) && segCache)
|
|
entry = segCache->cache(m_cacheStore, cmapGlyphs, length, seg, subSegStart);
|
|
seg->removeScope(scopeState);
|
|
}
|
|
else
|
|
{
|
|
//seg->splice(subSegStart, i - subSegStart + 1, subSegStartSlot, subSegEndSlot, entry);
|
|
seg->splice(subSegStart, i - subSegStart + 1, subSegStartSlot, subSegEndSlot,
|
|
entry->first(), entry->glyphLength());
|
|
}
|
|
}
|
|
subSegEndSlot = nextSlot;
|
|
subSegStartSlot = nextSlot;
|
|
subSegStart = i + 1;
|
|
spaceOnly = true;
|
|
}
|
|
else
|
|
{
|
|
subSegEndSlot = subSegEndSlot->next();
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#endif
|
|
|