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diff --git a/gfx/graphite2/src/gr_logging.cpp b/gfx/graphite2/src/gr_logging.cpp
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+/* 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 <cstdio>
+
+#include "graphite2/Log.h"
+#include "inc/debug.h"
+#include "inc/CharInfo.h"
+#include "inc/Slot.h"
+#include "inc/Segment.h"
+#include "inc/json.h"
+#include "inc/Collider.h"
+
+#if defined _WIN32
+#include "windows.h"
+#endif
+
+using namespace graphite2;
+
+#if !defined GRAPHITE2_NTRACING
+json *global_log = 0;
+#endif
+
+extern "C" {
+
+bool gr_start_logging(GR_MAYBE_UNUSED gr_face * face, const char *log_path)
+{
+ if (!log_path) return false;
+
+#if !defined GRAPHITE2_NTRACING
+ gr_stop_logging(face);
+#if defined _WIN32
+ int n = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, log_path, -1, 0, 0);
+ if (n == 0 || n > MAX_PATH - 12) return false;
+
+ LPWSTR wlog_path = gralloc<WCHAR>(n);
+ if (!wlog_path) return false;
+ FILE *log = 0;
+ if (wlog_path && MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, log_path, -1, wlog_path, n))
+ log = _wfopen(wlog_path, L"wt");
+
+ free(wlog_path);
+#else // _WIN32
+ FILE *log = fopen(log_path, "wt");
+#endif // _WIN32
+ if (!log) return false;
+
+ if (face)
+ {
+ face->setLogger(log);
+ if (!face->logger()) return false;
+
+ *face->logger() << json::array;
+#ifdef GRAPHITE2_TELEMETRY
+ *face->logger() << face->tele;
+#endif
+ }
+ else
+ {
+ global_log = new json(log);
+ *global_log << json::array;
+ }
+
+ return true;
+#else // GRAPHITE2_NTRACING
+ return false;
+#endif // GRAPHITE2_NTRACING
+}
+
+bool graphite_start_logging(FILE * /* log */, GrLogMask /* mask */)
+{
+//#if !defined GRAPHITE2_NTRACING
+// graphite_stop_logging();
+//
+// if (!log) return false;
+//
+// dbgout = new json(log);
+// if (!dbgout) return false;
+//
+// *dbgout << json::array;
+// return true;
+//#else
+ return false;
+//#endif
+}
+
+void gr_stop_logging(GR_MAYBE_UNUSED gr_face * face)
+{
+#if !defined GRAPHITE2_NTRACING
+ if (face && face->logger())
+ {
+ FILE * log = face->logger()->stream();
+ face->setLogger(0);
+ fclose(log);
+ }
+ else if (!face && global_log)
+ {
+ FILE * log = global_log->stream();
+ delete global_log;
+ global_log = 0;
+ fclose(log);
+ }
+#endif
+}
+
+void graphite_stop_logging()
+{
+// if (dbgout) delete dbgout;
+// dbgout = 0;
+}
+
+} // extern "C"
+
+#ifdef GRAPHITE2_TELEMETRY
+size_t * graphite2::telemetry::_category = 0UL;
+#endif
+
+#if !defined GRAPHITE2_NTRACING
+
+#ifdef GRAPHITE2_TELEMETRY
+
+json & graphite2::operator << (json & j, const telemetry & t) throw()
+{
+ j << json::object
+ << "type" << "telemetry"
+ << "silf" << t.silf
+ << "states" << t.states
+ << "starts" << t.starts
+ << "transitions" << t.transitions
+ << "glyphs" << t.glyph
+ << "code" << t.code
+ << "misc" << t.misc
+ << "total" << (t.silf + t.states + t.starts + t.transitions + t.glyph + t.code + t.misc)
+ << json::close;
+ return j;
+}
+#else
+json & graphite2::operator << (json & j, const telemetry &) throw()
+{
+ return j;
+}
+#endif
+
+
+json & graphite2::operator << (json & j, const CharInfo & ci) throw()
+{
+ return j << json::object
+ << "offset" << ci.base()
+ << "unicode" << ci.unicodeChar()
+ << "break" << ci.breakWeight()
+ << "flags" << ci.flags()
+ << "slot" << json::flat << json::object
+ << "before" << ci.before()
+ << "after" << ci.after()
+ << json::close
+ << json::close;
+}
+
+
+json & graphite2::operator << (json & j, const dslot & ds) throw()
+{
+ assert(ds.first);
+ assert(ds.second);
+ const Segment & seg = *ds.first;
+ const Slot & s = *ds.second;
+ const SlotCollision *cslot = seg.collisionInfo(ds.second);
+
+ j << json::object
+ << "id" << objectid(ds)
+ << "gid" << s.gid()
+ << "charinfo" << json::flat << json::object
+ << "original" << s.original()
+ << "before" << s.before()
+ << "after" << s.after()
+ << json::close
+ << "origin" << s.origin()
+ << "shift" << Position(float(s.getAttr(0, gr_slatShiftX, 0)),
+ float(s.getAttr(0, gr_slatShiftY, 0)))
+ << "advance" << s.advancePos()
+ << "insert" << s.isInsertBefore()
+ << "break" << s.getAttr(&seg, gr_slatBreak, 0);
+ if (s.just() > 0)
+ j << "justification" << s.just();
+ if (s.getBidiLevel() > 0)
+ j << "bidi" << s.getBidiLevel();
+ if (!s.isBase())
+ j << "parent" << json::flat << json::object
+ << "id" << objectid(dslot(&seg, s.attachedTo()))
+ << "level" << s.getAttr(0, gr_slatAttLevel, 0)
+ << "offset" << s.attachOffset()
+ << json::close;
+ j << "user" << json::flat << json::array;
+ for (int n = 0; n!= seg.numAttrs(); ++n)
+ j << s.userAttrs()[n];
+ j << json::close;
+ if (s.firstChild())
+ {
+ j << "children" << json::flat << json::array;
+ for (const Slot *c = s.firstChild(); c; c = c->nextSibling())
+ j << objectid(dslot(&seg, c));
+ j << json::close;
+ }
+ if (cslot)
+ {
+ // Note: the reason for using Positions to lump together related attributes is to make the
+ // JSON output slightly more compact.
+ j << "collision" << json::flat << json::object
+// << "shift" << cslot->shift() -- not used pass level, only within the collision routine itself
+ << "offset" << cslot->offset()
+ << "limit" << cslot->limit()
+ << "flags" << cslot->flags()
+ << "margin" << Position(cslot->margin(), cslot->marginWt())
+ << "exclude" << cslot->exclGlyph()
+ << "excludeoffset" << cslot->exclOffset();
+ if (cslot->seqOrder() != 0)
+ {
+ j << "seqclass" << Position(cslot->seqClass(), cslot->seqProxClass())
+ << "seqorder" << cslot->seqOrder()
+ << "seqabove" << Position(cslot->seqAboveXoff(), cslot->seqAboveWt())
+ << "seqbelow" << Position(cslot->seqBelowXlim(), cslot->seqBelowWt())
+ << "seqvalign" << Position(cslot->seqValignHt(), cslot->seqValignWt());
+ }
+ j << json::close;
+ }
+ return j << json::close;
+}
+
+
+graphite2::objectid::objectid(const dslot & ds) throw()
+{
+ const Slot * const p = ds.second;
+ uint32 s = uint32(reinterpret_cast<size_t>(p));
+ sprintf(name, "%.4x-%.2x-%.4hx", uint16(s >> 16), uint16(p ? p->userAttrs()[ds.first->silf()->numUser()] : 0), uint16(s));
+ name[sizeof name-1] = 0;
+}
+
+graphite2::objectid::objectid(const Segment * const p) throw()
+{
+ uint32 s = uint32(reinterpret_cast<size_t>(p));
+ sprintf(name, "%.4x-%.2x-%.4hx", uint16(s >> 16), 0, uint16(s));
+ name[sizeof name-1] = 0;
+}
+
+#endif
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