Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2468 insertions, 0 deletions

diff --git a/vcl/source/fontsubset/sft.cxx b/vcl/source/fontsubset/sft.cxx
new file mode 100644
index 000000000..93ad3e98d
--- /dev/null
+++ b/vcl/source/fontsubset/sft.cxx
@@ -0,0 +1,2468 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+/*
+ * Sun Font Tools
+ *
+ * Author: Alexander Gelfenbain
+ *
+ */
+
+#include <assert.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#ifdef UNX
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#endif
+#include <sft.hxx>
+#include <impfontcharmap.hxx>
+#ifdef SYSTEM_LIBFIXMATH
+#include <libfixmath/fix16.hpp>
+#else
+#include <tools/fix16.hxx>
+#endif
+#include "ttcr.hxx"
+#include "xlat.hxx"
+#include <rtl/crc.h>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+#include <o3tl/safeint.hxx>
+#include <osl/endian.h>
+#include <fontsubset.hxx>
+#include <algorithm>
+
+namespace vcl
+{
+
+/*- module identification */
+
+const char * const modname  = "SunTypeTools-TT";
+const char * const modver   = "1.0";
+const char * const modextra = "gelf";
+
+/*- private functions, constants and data types */
+
+namespace {
+
+enum PathSegmentType {
+    PS_NOOP      = 0,
+    PS_MOVETO    = 1,
+    PS_LINETO    = 2,
+    PS_CURVETO   = 3,
+    PS_CLOSEPATH = 4
+};
+
+struct PSPathElement
+{
+    PathSegmentType type;
+    int x1, y1;
+    int x2, y2;
+    int x3, y3;
+
+    explicit PSPathElement( PathSegmentType i_eType ) : type( i_eType ),
+                                   x1( 0 ), y1( 0 ),
+                                   x2( 0 ), y2( 0 ),
+                                   x3( 0 ), y3( 0 )
+    {
+    }
+};
+
+/*- In horizontal writing mode right sidebearing is calculated using this formula
+ *- rsb = aw - (lsb + xMax - xMin) -*/
+struct TTGlyphMetrics {
+    sal_Int16  xMin;
+    sal_Int16  yMin;
+    sal_Int16  xMax;
+    sal_Int16  yMax;
+    sal_uInt16 aw;                /*- Advance Width (horizontal writing mode)    */
+    sal_Int16  lsb;               /*- Left sidebearing (horizontal writing mode) */
+    sal_uInt16 ah;                /*- advance height (vertical writing mode)     */
+};
+
+#define HFORMAT_LINELEN 64
+
+struct HexFmt {
+    FILE *o;
+    char buffer[HFORMAT_LINELEN];
+    size_t bufpos;
+    int total;
+};
+
+struct GlyphOffsets {
+    sal_uInt32 nGlyphs;           /* number of glyphs in the font + 1 */
+    sal_uInt32 *offs;             /* array of nGlyphs offsets */
+};
+
+}
+
+static void *smalloc(size_t size)
+{
+    void *res = malloc(size);
+    assert(res != nullptr);
+    return res;
+}
+
+static void *scalloc(size_t n, size_t size)
+{
+    void *res = calloc(n, size);
+    assert(res != nullptr);
+    return res;
+}
+
+/*- Data access methods for data stored in big-endian format */
+static sal_Int16 GetInt16(const sal_uInt8 *ptr, size_t offset)
+{
+    sal_Int16 t;
+    assert(ptr != nullptr);
+
+    t = (ptr+offset)[0] << 8 | (ptr+offset)[1];
+
+    return t;
+}
+
+static sal_uInt16 GetUInt16(const sal_uInt8 *ptr, size_t offset)
+{
+    sal_uInt16 t;
+    assert(ptr != nullptr);
+
+    t = (ptr+offset)[0] << 8 | (ptr+offset)[1];
+
+    return t;
+}
+
+static sal_Int32  GetInt32(const sal_uInt8 *ptr, size_t offset)
+{
+    sal_Int32 t;
+    assert(ptr != nullptr);
+
+    t = (ptr+offset)[0] << 24 | (ptr+offset)[1] << 16 |
+        (ptr+offset)[2] << 8  | (ptr+offset)[3];
+
+    return t;
+}
+
+static sal_uInt32 GetUInt32(const sal_uInt8 *ptr, size_t offset)
+{
+    sal_uInt32 t;
+    assert(ptr != nullptr);
+
+    t = (ptr+offset)[0] << 24 | (ptr+offset)[1] << 16 |
+        (ptr+offset)[2] << 8  | (ptr+offset)[3];
+
+    return t;
+}
+
+static F16Dot16 fixedMul(F16Dot16 a, F16Dot16 b)
+{
+    return fix16_mul(a, b);
+}
+
+static F16Dot16 fixedDiv(F16Dot16 a, F16Dot16 b)
+{
+    return fix16_div(a, b);
+}
+
+/*- returns a * b / c -*/
+/* XXX provide a real implementation that preserves accuracy */
+static F16Dot16 fixedMulDiv(F16Dot16 a, F16Dot16 b, F16Dot16 c)
+{
+    F16Dot16 res = fixedMul(a, b);
+    return fixedDiv(res, c);
+}
+
+/*- Translate units from TT to PS (standard 1/1000) -*/
+static int XUnits(int unitsPerEm, int n)
+{
+    return (n * 1000) / unitsPerEm;
+}
+
+static char toHex(sal_uInt8 nIndex)
+{
+    /* Hex Formatter functions */
+    static const char HexChars[] = "0123456789ABCDEF";
+    assert(nIndex < SAL_N_ELEMENTS(HexChars));
+    return HexChars[nIndex];
+}
+
+static HexFmt *HexFmtNew(FILE *outf)
+{
+    HexFmt* res = static_cast<HexFmt*>(smalloc(sizeof(HexFmt)));
+    res->bufpos = res->total = 0;
+    res->o = outf;
+    return res;
+}
+
+static bool HexFmtFlush(HexFmt *_this)
+{
+    bool bRet = true;
+    if (_this->bufpos) {
+        size_t nWritten = fwrite(_this->buffer, 1, _this->bufpos, _this->o);
+        bRet = nWritten == _this->bufpos;
+        _this->bufpos = 0;
+    }
+    return bRet;
+}
+
+static void HexFmtOpenString(HexFmt *_this)
+{
+    fputs("<\n", _this->o);
+}
+
+static void HexFmtCloseString(HexFmt *_this)
+{
+    HexFmtFlush(_this);
+    fputs("00\n>\n", _this->o);
+}
+
+static void HexFmtDispose(HexFmt *_this)
+{
+    HexFmtFlush(_this);
+    free(_this);
+}
+
+static void HexFmtBlockWrite(HexFmt *_this, const void *ptr, sal_uInt32 size)
+{
+    if (_this->total + size > 65534) {
+        HexFmtFlush(_this);
+        HexFmtCloseString(_this);
+        _this->total = 0;
+        HexFmtOpenString(_this);
+    }
+
+    for (sal_uInt32 i = 0; i < size; ++i) {
+        sal_uInt8 Ch = static_cast<sal_uInt8 const *>(ptr)[i];
+        _this->buffer[_this->bufpos++] = toHex(Ch >> 4);
+        _this->buffer[_this->bufpos++] = toHex(Ch & 0xF);
+        if (_this->bufpos == HFORMAT_LINELEN) {
+            HexFmtFlush(_this);
+            fputc('\n', _this->o);
+        }
+
+    }
+    _this->total += size;
+}
+
+/* Outline Extraction functions */
+
+/* fills the aw and lsb entries of the TTGlyphMetrics structure from hmtx table -*/
+static void GetMetrics(AbstractTrueTypeFont const *ttf, sal_uInt32 glyphID, TTGlyphMetrics *metrics)
+{
+    sal_uInt32 nSize;
+    const sal_uInt8* table = ttf->table(O_hmtx, nSize);
+
+    metrics->aw = metrics->lsb = metrics->ah = 0;
+    if (!table || !ttf->horzMetricCount())
+        return;
+
+    if (glyphID < ttf->horzMetricCount())
+    {
+        metrics->aw = GetUInt16(table, 4 * glyphID);
+        metrics->lsb = GetInt16(table, 4 * glyphID + 2);
+    }
+    else
+    {
+        metrics->aw = GetUInt16(table, 4 * (ttf->horzMetricCount() - 1));
+        metrics->lsb = GetInt16(table + ttf->horzMetricCount() * 4, (glyphID - ttf->horzMetricCount()) * 2);
+    }
+
+    table = ttf->table(O_vmtx, nSize);
+    if (!table || !ttf->vertMetricCount())
+        return;
+
+    if (glyphID < ttf->vertMetricCount())
+        metrics->ah = GetUInt16(table, 4 * glyphID);
+    else
+        metrics->ah = GetUInt16(table, 4 * (ttf->vertMetricCount() - 1));
+}
+
+static int GetTTGlyphOutline(AbstractTrueTypeFont *, sal_uInt32 , ControlPoint **, TTGlyphMetrics *, std::vector< sal_uInt32 >* );
+
+/* returns the number of control points, allocates the pointArray */
+static int GetSimpleTTOutline(AbstractTrueTypeFont const *ttf, sal_uInt32 glyphID, ControlPoint **pointArray, TTGlyphMetrics *metrics)
+{
+    sal_uInt32 nTableSize;
+    const sal_uInt8* table = ttf->table(O_glyf, nTableSize);
+    sal_uInt8 n;
+    int i, j, z;
+
+    *pointArray = nullptr;
+
+    if (glyphID >= ttf->glyphCount())
+        return 0;
+
+    sal_uInt32 nGlyphOffset = ttf->glyphOffset(glyphID);
+    if (nGlyphOffset > nTableSize)
+        return 0;
+
+    const sal_uInt8* ptr = table + nGlyphOffset;
+    const sal_uInt32 nMaxGlyphSize = nTableSize - nGlyphOffset;
+    constexpr sal_uInt32 nContourOffset = 10;
+    if (nMaxGlyphSize < nContourOffset)
+        return 0;
+
+    const sal_Int16 numberOfContours = GetInt16(ptr, GLYF_numberOfContours_offset);
+    if( numberOfContours <= 0 )             /*- glyph is not simple */
+        return 0;
+
+    const sal_Int32 nMaxContours = (nMaxGlyphSize - nContourOffset)/2;
+    if (numberOfContours > nMaxContours)
+        return 0;
+
+    if (metrics) {                                                    /*- GetCompoundTTOutline() calls this function with NULL metrics -*/
+        metrics->xMin = GetInt16(ptr, GLYF_xMin_offset);
+        metrics->yMin = GetInt16(ptr, GLYF_yMin_offset);
+        metrics->xMax = GetInt16(ptr, GLYF_xMax_offset);
+        metrics->yMax = GetInt16(ptr, GLYF_yMax_offset);
+        GetMetrics(ttf, glyphID, metrics);
+    }
+
+    /* determine the last point and be extra safe about it. But probably this code is not needed */
+    sal_uInt16 lastPoint=0;
+    for (i=0; i<numberOfContours; i++)
+    {
+        const sal_uInt16 t = GetUInt16(ptr, nContourOffset + i * 2);
+        if (t > lastPoint)
+            lastPoint = t;
+    }
+
+    sal_uInt32 nInstLenOffset = nContourOffset + numberOfContours * 2;
+    if (nInstLenOffset + 2 > nMaxGlyphSize)
+        return 0;
+    sal_uInt16 instLen = GetUInt16(ptr, nInstLenOffset);
+
+    sal_uInt32 nOffset = nContourOffset + 2 * numberOfContours + 2 + instLen;
+    if (nOffset > nMaxGlyphSize)
+        return 0;
+    const sal_uInt8* p = ptr + nOffset;
+
+    sal_uInt32 nBytesRemaining = nMaxGlyphSize - nOffset;
+    const sal_uInt32 palen = lastPoint+1;
+
+    //at a minimum its one byte per entry
+    if (palen > nBytesRemaining || lastPoint > nBytesRemaining-1)
+    {
+        SAL_WARN("vcl.fonts", "Font " << OUString::createFromAscii(ttf->fileName()) <<
+            "claimed a palen of "
+            << palen << " but max bytes remaining is " << nBytesRemaining);
+        return 0;
+    }
+
+    ControlPoint* pa = static_cast<ControlPoint*>(calloc(palen, sizeof(ControlPoint)));
+
+    i = 0;
+    while (i <= lastPoint) {
+        if (!nBytesRemaining)
+        {
+            SAL_WARN("vcl.fonts", "short read");
+            break;
+        }
+        sal_uInt8 flag = *p++;
+        --nBytesRemaining;
+        pa[i++].flags = static_cast<sal_uInt32>(flag);
+        if (flag & 8) {                                     /*- repeat flag */
+            if (!nBytesRemaining)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                break;
+            }
+            n = *p++;
+            --nBytesRemaining;
+            // coverity[tainted_data : FALSE] - i > lastPoint extra checks the n loop bound
+            for (j=0; j<n; j++) {
+                if (i > lastPoint) {                        /*- if the font is really broken */
+                    free(pa);
+                    return 0;
+                }
+                pa[i++].flags = flag;
+            }
+        }
+    }
+
+    /*- Process the X coordinate */
+    z = 0;
+    for (i = 0; i <= lastPoint; i++) {
+        if (pa[i].flags & 0x02) {
+            if (!nBytesRemaining)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                break;
+            }
+            if (pa[i].flags & 0x10) {
+                z += static_cast<int>(*p++);
+            } else {
+                z -= static_cast<int>(*p++);
+            }
+            --nBytesRemaining;
+        } else if ( !(pa[i].flags & 0x10)) {
+            if (nBytesRemaining < 2)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                break;
+            }
+            z += GetInt16(p, 0);
+            p += 2;
+            nBytesRemaining -= 2;
+        }
+        pa[i].x = static_cast<sal_Int16>(z);
+    }
+
+    /*- Process the Y coordinate */
+    z = 0;
+    for (i = 0; i <= lastPoint; i++) {
+        if (pa[i].flags & 0x04) {
+            if (!nBytesRemaining)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                break;
+            }
+            if (pa[i].flags & 0x20) {
+                z += *p++;
+            } else {
+                z -= *p++;
+            }
+            --nBytesRemaining;
+        } else if ( !(pa[i].flags & 0x20)) {
+            if (nBytesRemaining < 2)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                break;
+            }
+            z += GetInt16(p, 0);
+            p += 2;
+            nBytesRemaining -= 2;
+        }
+        pa[i].y = static_cast<sal_Int16>(z);
+    }
+
+    for (i=0; i<numberOfContours; i++) {
+        sal_uInt16 offset = GetUInt16(ptr, 10 + i * 2);
+        SAL_WARN_IF(offset >= palen, "vcl.fonts", "Font " << OUString::createFromAscii(ttf->fileName()) <<
+            " contour " << i << " claimed an illegal offset of "
+            << offset << " but max offset is " << palen-1);
+        if (offset >= palen)
+            continue;
+        pa[offset].flags |= 0x00008000;      /*- set the end contour flag */
+    }
+
+    *pointArray = pa;
+    return lastPoint + 1;
+}
+
+static F16Dot16 fromF2Dot14(sal_Int16 n)
+{
+    // Avoid undefined shift of negative values prior to C++2a:
+    return sal_uInt32(n) << 2;
+}
+
+static int GetCompoundTTOutline(AbstractTrueTypeFont *ttf, sal_uInt32 glyphID, ControlPoint **pointArray, TTGlyphMetrics *metrics, std::vector< sal_uInt32 >& glyphlist)
+{
+    sal_uInt16 flags, index;
+    sal_Int16 e, f;
+    sal_uInt32 nTableSize;
+    const sal_uInt8* table = ttf->table(O_glyf, nTableSize);
+    std::vector<ControlPoint> myPoints;
+    ControlPoint *nextComponent, *pa;
+    int i, np;
+    F16Dot16 a = 0x10000, b = 0, c = 0, d = 0x10000, m, n, abs1, abs2, abs3;
+
+    *pointArray = nullptr;
+
+    if (glyphID >= ttf->glyphCount())
+        return 0;
+
+    sal_uInt32 nGlyphOffset = ttf->glyphOffset(glyphID);
+    if (nGlyphOffset > nTableSize)
+        return 0;
+
+    const sal_uInt8* ptr = table + nGlyphOffset;
+    sal_uInt32 nAvailableBytes = nTableSize - nGlyphOffset;
+
+    if (GLYF_numberOfContours_offset + 2 > nAvailableBytes)
+        return 0;
+
+    if (GetInt16(ptr, GLYF_numberOfContours_offset) != -1)   /* number of contours - glyph is not compound */
+        return 0;
+
+    if (metrics) {
+        metrics->xMin = GetInt16(ptr, GLYF_xMin_offset);
+        metrics->yMin = GetInt16(ptr, GLYF_yMin_offset);
+        metrics->xMax = GetInt16(ptr, GLYF_xMax_offset);
+        metrics->yMax = GetInt16(ptr, GLYF_yMax_offset);
+        GetMetrics(ttf, glyphID, metrics);
+    }
+
+    if (nAvailableBytes < 10)
+    {
+        SAL_WARN("vcl.fonts", "short read");
+        return 0;
+    }
+
+    ptr += 10;
+    nAvailableBytes -= 10;
+
+    do {
+
+        if (nAvailableBytes < 4)
+        {
+            SAL_WARN("vcl.fonts", "short read");
+            return 0;
+        }
+        flags = GetUInt16(ptr, 0);
+        /* printf("flags: 0x%X\n", flags); */
+        index = GetUInt16(ptr, 2);
+        ptr += 4;
+        nAvailableBytes -= 4;
+
+        if( std::find( glyphlist.begin(), glyphlist.end(), index ) != glyphlist.end() )
+        {
+            SAL_WARN("vcl.fonts", "Endless loop found in a compound glyph.");
+
+#if OSL_DEBUG_LEVEL > 1
+            std::ostringstream oss;
+            oss << index << " -> [";
+            for( const auto& rGlyph : glyphlist )
+            {
+                oss << (int) rGlyph << " ";
+            }
+            oss << "]";
+            SAL_INFO("vcl.fonts", oss.str());
+        /**/
+#endif
+            return 0;
+        }
+
+        glyphlist.push_back( index );
+
+        np = GetTTGlyphOutline(ttf, index, &nextComponent, nullptr, &glyphlist);
+
+        if( ! glyphlist.empty() )
+            glyphlist.pop_back();
+
+        if (np == 0)
+        {
+            /* XXX that probably indicates a corrupted font */
+            SAL_WARN("vcl.fonts", "An empty compound!");
+            /* assert(!"An empty compound"); */
+            return 0;
+        }
+
+        if ((flags & USE_MY_METRICS) && metrics)
+            GetMetrics(ttf, index, metrics);
+
+        if (flags & ARG_1_AND_2_ARE_WORDS) {
+            if (nAvailableBytes < 4)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                free(nextComponent);
+                return 0;
+            }
+            e = GetInt16(ptr, 0);
+            f = GetInt16(ptr, 2);
+            /* printf("ARG_1_AND_2_ARE_WORDS: %d %d\n", e & 0xFFFF, f & 0xFFFF); */
+            ptr += 4;
+            nAvailableBytes -= 4;
+        } else {
+            if (nAvailableBytes < 2)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                free(nextComponent);
+                return 0;
+            }
+            if (flags & ARGS_ARE_XY_VALUES) {     /* args are signed */
+                e = static_cast<sal_Int8>(*ptr++);
+                f = static_cast<sal_Int8>(*ptr++);
+                /* printf("ARGS_ARE_XY_VALUES: %d %d\n", e & 0xFF, f & 0xFF); */
+            } else {                              /* args are unsigned */
+                /* printf("!ARGS_ARE_XY_VALUES\n"); */
+                e = *ptr++;
+                f = *ptr++;
+            }
+            nAvailableBytes -= 2;
+        }
+
+        a = d = 0x10000;
+        b = c = 0;
+
+        if (flags & WE_HAVE_A_SCALE) {
+            if (nAvailableBytes < 2)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                free(nextComponent);
+                return 0;
+            }
+            a = fromF2Dot14(GetInt16(ptr, 0));
+            d = a;
+            ptr += 2;
+            nAvailableBytes -= 2;
+        } else if (flags & WE_HAVE_AN_X_AND_Y_SCALE) {
+            if (nAvailableBytes < 4)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                free(nextComponent);
+                return 0;
+            }
+            a = fromF2Dot14(GetInt16(ptr, 0));
+            d = fromF2Dot14(GetInt16(ptr, 2));
+            ptr += 4;
+            nAvailableBytes -= 4;
+        } else if (flags & WE_HAVE_A_TWO_BY_TWO) {
+            if (nAvailableBytes < 8)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                free(nextComponent);
+                return 0;
+            }
+            a = fromF2Dot14(GetInt16(ptr, 0));
+            b = fromF2Dot14(GetInt16(ptr, 2));
+            c = fromF2Dot14(GetInt16(ptr, 4));
+            d = fromF2Dot14(GetInt16(ptr, 6));
+            ptr += 8;
+            nAvailableBytes -= 8;
+        }
+
+        abs1 = (a < 0) ? -a : a;
+        abs2 = (b < 0) ? -b : b;
+        m    = std::max(abs1, abs2);
+        abs3 = abs1 - abs2;
+        if (abs3 < 0) abs3 = -abs3;
+        if (abs3 <= 33) m *= 2;
+
+        abs1 = (c < 0) ? -c : c;
+        abs2 = (d < 0) ? -d : d;
+        n    = std::max(abs1, abs2);
+        abs3 = abs1 - abs2;
+        if (abs3 < 0) abs3 = -abs3;
+        if (abs3 <= 33) n *= 2;
+
+        SAL_WARN_IF(np && (!m || !n), "vcl.fonts", "Parsing error in " << OUString::createFromAscii(ttf->fileName()) <<
+                     ": divide by zero");
+
+        if (m != 0 && n != 0) {
+            for (i=0; i<np; i++) {
+                F16Dot16 t;
+                ControlPoint cp;
+                cp.flags = nextComponent[i].flags;
+                const sal_uInt16 x = nextComponent[i].x;
+                const sal_uInt16 y = nextComponent[i].y;
+                t = o3tl::saturating_add(o3tl::saturating_add(fixedMulDiv(a, x << 16, m), fixedMulDiv(c, y << 16, m)), sal_Int32(sal_uInt16(e) << 16));
+                cp.x = static_cast<sal_Int16>(fixedMul(t, m) >> 16);
+                t = o3tl::saturating_add(o3tl::saturating_add(fixedMulDiv(b, x << 16, n), fixedMulDiv(d, y << 16, n)), sal_Int32(sal_uInt16(f) << 16));
+                cp.y = static_cast<sal_Int16>(fixedMul(t, n) >> 16);
+
+                myPoints.push_back( cp );
+            }
+        }
+
+        free(nextComponent);
+
+    } while (flags & MORE_COMPONENTS);
+
+    // #i123417# some fonts like IFAOGrec have no outline points in some compound glyphs
+    // so this unlikely but possible scenario should be handled gracefully
+    if( myPoints.empty() )
+        return 0;
+
+    np = myPoints.size();
+    if (np > 0)
+    {
+        pa = static_cast<ControlPoint*>(calloc(np, sizeof(ControlPoint)));
+        assert(pa != nullptr);
+
+        memcpy(pa, myPoints.data(), np * sizeof(ControlPoint));
+
+        *pointArray = pa;
+    }
+    return np;
+}
+
+/* NOTE: GetTTGlyphOutline() returns -1 if the glyphID is incorrect,
+ * but Get{Simple|Compound}GlyphOutline returns 0 in such a case.
+ *
+ * NOTE: glyphlist is the stack of glyphs traversed while constructing
+ * a composite glyph. This is a safeguard against endless recursion
+ * in corrupted fonts.
+ */
+static int GetTTGlyphOutline(AbstractTrueTypeFont *ttf, sal_uInt32 glyphID, ControlPoint **pointArray, TTGlyphMetrics *metrics, std::vector< sal_uInt32 >* glyphlist)
+{
+    sal_uInt32 glyflength;
+    const sal_uInt8 *table = ttf->table(O_glyf, glyflength);
+    sal_Int16 numberOfContours;
+    int res;
+    *pointArray = nullptr;
+
+    if (metrics)
+        memset(metrics, 0, sizeof(TTGlyphMetrics));
+
+    if (glyphID >= ttf->glyphCount())
+        return -1;
+
+    sal_uInt32 nNextOffset = ttf->glyphOffset(glyphID + 1);
+    if (nNextOffset > glyflength)
+        return -1;
+
+    sal_uInt32 nOffset = ttf->glyphOffset(glyphID);
+    if (nOffset > nNextOffset)
+        return -1;
+
+    int length = nNextOffset - nOffset;
+    if (length == 0) {                                      /*- empty glyphs still have hmtx and vmtx metrics values */
+        if (metrics) GetMetrics(ttf, glyphID, metrics);
+        return 0;
+    }
+
+    const sal_uInt8* ptr = table + nOffset;
+    const sal_uInt32 nMaxGlyphSize = glyflength - nOffset;
+
+    if (nMaxGlyphSize < 2)
+        return -1;
+
+    numberOfContours = GetInt16(ptr, 0);
+
+    if (numberOfContours >= 0)
+    {
+        res=GetSimpleTTOutline(ttf, glyphID, pointArray, metrics);
+    }
+    else
+    {
+        std::vector< sal_uInt32 > aPrivList { glyphID };
+        res = GetCompoundTTOutline(ttf, glyphID, pointArray, metrics, glyphlist ? *glyphlist : aPrivList );
+    }
+
+    return res;
+}
+
+/*- returns the number of items in the path -*/
+
+static int BSplineToPSPath(ControlPoint const *srcA, int srcCount, PSPathElement **path)
+{
+    std::vector< PSPathElement > aPathList;
+    int nPathCount = 0;
+    PSPathElement p( PS_NOOP );
+
+    int x0 = 0, y0 = 0, x1 = 0, y1 = 0, x2, y2, curx, cury;
+    bool lastOff = false;                                   /*- last point was off-contour */
+    int scflag = 1;                                         /*- start contour flag */
+    bool ecflag = false;                                    /*- end contour flag */
+    int cp = 0;                                             /*- current point */
+    int StartContour = 0, EndContour = 1;
+
+    *path = nullptr;
+
+    /* if (srcCount > 0) for(;;) */
+    while (srcCount > 0) {                                  /*- srcCount does not get changed inside the loop. */
+        if (scflag) {
+            int l = cp;
+            StartContour = cp;
+            while (!(srcA[l].flags & 0x8000)) l++;
+            EndContour = l;
+            if (StartContour == EndContour) {
+                if (cp + 1 < srcCount) {
+                    cp++;
+                    continue;
+                } else {
+                    break;
+                }
+            }
+            p = PSPathElement(PS_MOVETO);
+            if (!(srcA[cp].flags & 1)) {
+                if (!(srcA[EndContour].flags & 1)) {
+                    p.x1 = x0 = (srcA[cp].x + srcA[EndContour].x + 1) / 2;
+                    p.y1 = y0 = (srcA[cp].y + srcA[EndContour].y + 1) / 2;
+                } else {
+                    p.x1 = x0 = srcA[EndContour].x;
+                    p.y1 = y0 = srcA[EndContour].y;
+                }
+            } else {
+                p.x1 = x0 = srcA[cp].x;
+                p.y1 = y0 = srcA[cp].y;
+                cp++;
+            }
+            aPathList.push_back( p );
+            lastOff = false;
+            scflag = 0;
+        }
+
+        curx = srcA[cp].x;
+        cury = srcA[cp].y;
+
+        if (srcA[cp].flags & 1)
+        {
+            if (lastOff)
+            {
+                p = PSPathElement(PS_CURVETO);
+                p.x1 = x0 + (2 * (x1 - x0) + 1) / 3;
+                p.y1 = y0 + (2 * (y1 - y0) + 1) / 3;
+                p.x2 = x1 + (curx - x1 + 1) / 3;
+                p.y2 = y1 + (cury - y1 + 1) / 3;
+                p.x3 = curx;
+                p.y3 = cury;
+                aPathList.push_back( p );
+            }
+            else
+            {
+                if (x0 != curx || y0 != cury)
+                {                              /* eliminate empty lines */
+                    p = PSPathElement(PS_LINETO);
+                    p.x1 = curx;
+                    p.y1 = cury;
+                    aPathList.push_back( p );
+                }
+            }
+            x0 = curx; y0 = cury; lastOff = false;
+        }
+        else
+        {
+            if (lastOff)
+            {
+                x2 = (x1 + curx + 1) / 2;
+                y2 = (y1 + cury + 1) / 2;
+                p = PSPathElement(PS_CURVETO);
+                p.x1 = x0 + (2 * (x1 - x0) + 1) / 3;
+                p.y1 = y0 + (2 * (y1 - y0) + 1) / 3;
+                p.x2 = x1 + (x2 - x1 + 1) / 3;
+                p.y2 = y1 + (y2 - y1 + 1) / 3;
+                p.x3 = x2;
+                p.y3 = y2;
+                aPathList.push_back( p );
+                x0 = x2; y0 = y2;
+                x1 = curx; y1 = cury;
+            } else {
+                x1 = curx; y1 = cury;
+            }
+            lastOff = true;
+        }
+
+        if (ecflag) {
+            aPathList.emplace_back(PS_CLOSEPATH );
+            scflag = 1;
+            ecflag = false;
+            cp = EndContour + 1;
+            if (cp >= srcCount) break;
+            continue;
+        }
+
+        if (cp == EndContour) {
+            cp = StartContour;
+            ecflag = true;
+        } else {
+            cp++;
+        }
+    }
+
+    if( (nPathCount = static_cast<int>(aPathList.size())) > 0)
+    {
+        *path = static_cast<PSPathElement*>(calloc(nPathCount, sizeof(PSPathElement)));
+        assert(*path != nullptr);
+        memcpy( *path, aPathList.data(), nPathCount * sizeof(PSPathElement) );
+    }
+
+    return nPathCount;
+}
+
+/*- Extracts a string from the name table and allocates memory for it -*/
+
+static char *nameExtract( const sal_uInt8* name, int nTableSize, int n, int dbFlag, sal_Unicode** ucs2result )
+{
+    char *res;
+    const sal_uInt8* ptr = name + GetUInt16(name, 4) + GetUInt16(name + 6, 12 * n + 10);
+    int len = GetUInt16(name+6, 12 * n + 8);
+
+    // sanity check
+    const sal_uInt8* end_table = name+nTableSize;
+    const int available_space = ptr > end_table ? 0 : (end_table - ptr);
+    if( (len <= 0) || len > available_space)
+    {
+        if( ucs2result )
+            *ucs2result = nullptr;
+        return nullptr;
+    }
+
+    if( ucs2result )
+        *ucs2result = nullptr;
+    if (dbFlag) {
+        res = static_cast<char*>(malloc(1 + len/2));
+        assert(res != nullptr);
+        for (int i = 0; i < len/2; i++)
+            res[i] = *(ptr + i * 2 + 1);
+        res[len/2] = 0;
+        if( ucs2result )
+        {
+            *ucs2result = static_cast<sal_Unicode*>(malloc( len+2 ));
+            for (int i = 0; i < len/2; i++ )
+                (*ucs2result)[i] = GetUInt16( ptr, 2*i );
+            (*ucs2result)[len/2] = 0;
+        }
+    } else {
+        res = static_cast<char*>(malloc(1 + len));
+        assert(res != nullptr);
+        memcpy(res, ptr, len);
+        res[len] = 0;
+    }
+
+    return res;
+}
+
+static int findname( const sal_uInt8 *name, sal_uInt16 n, sal_uInt16 platformID,
+    sal_uInt16 encodingID, sal_uInt16 languageID, sal_uInt16 nameID )
+{
+    if (n == 0) return -1;
+
+    int l = 0, r = n-1;
+    sal_uInt32 t1, t2;
+    sal_uInt32 m1, m2;
+
+    m1 = (platformID << 16) | encodingID;
+    m2 = (languageID << 16) | nameID;
+
+    do {
+        const int i = (l + r) >> 1;
+        t1 = GetUInt32(name + 6, i * 12 + 0);
+        t2 = GetUInt32(name + 6, i * 12 + 4);
+
+        if (! ((m1 < t1) || ((m1 == t1) && (m2 < t2)))) l = i + 1;
+        if (! ((m1 > t1) || ((m1 == t1) && (m2 > t2)))) r = i - 1;
+    } while (l <= r);
+
+    if (l - r == 2) {
+        return l - 1;
+    }
+
+    return -1;
+}
+
+/* XXX marlett.ttf uses (3, 0, 1033) instead of (3, 1, 1033) and does not have any Apple tables.
+ * Fix: if (3, 1, 1033) is not found - need to check for (3, 0, 1033)
+ *
+ * /d/fonts/ttzh_tw/Big5/Hanyi/ma6b5p uses (1, 0, 19) for English strings, instead of (1, 0, 0)
+ * and does not have (3, 1, 1033)
+ * Fix: if (1, 0, 0) and (3, 1, 1033) are not found need to look for (1, 0, *) - that will
+ * require a change in algorithm
+ *
+ * /d/fonts/fdltest/Korean/h2drrm has unsorted names and an unknown (to me) Mac LanguageID,
+ * but (1, 0, 1042) strings usable
+ * Fix: change algorithm, and use (1, 0, *) if both standard Mac and MS strings are not found
+ */
+
+static void GetNames(TrueTypeFont *t)
+{
+    sal_uInt32 nTableSize;
+    const sal_uInt8* table = t->table(O_name, nTableSize);
+
+    if (nTableSize < 6)
+    {
+#if OSL_DEBUG_LEVEL > 1
+        SAL_WARN("vcl.fonts", "O_name table too small.");
+#endif
+        return;
+    }
+
+    sal_uInt16 n = GetUInt16(table, 2);
+
+    /* simple sanity check for name table entry count */
+    const size_t nMinRecordSize = 12;
+    const size_t nSpaceAvailable = nTableSize - 6;
+    const size_t nMaxRecords = nSpaceAvailable/nMinRecordSize;
+    if (n >= nMaxRecords)
+        n = 0;
+
+    int i, r;
+    bool bPSNameOK = true;
+
+    /* PostScript name: preferred Microsoft */
+    t->psname = nullptr;
+    if ((r = findname(table, n, 3, 1, 0x0409, 6)) != -1)
+        t->psname = nameExtract(table, nTableSize, r, 1, nullptr);
+    if ( ! t->psname && (r = findname(table, n, 1, 0, 0, 6)) != -1)
+        t->psname = nameExtract(table, nTableSize, r, 0, nullptr);
+    if ( ! t->psname && (r = findname(table, n, 3, 0, 0x0409, 6)) != -1)
+    {
+        // some symbol fonts like Marlett have a 3,0 name!
+        t->psname = nameExtract(table, nTableSize, r, 1, nullptr);
+    }
+    // for embedded font in Ghostscript PDFs
+    if ( ! t->psname && (r = findname(table, n, 2, 2, 0, 6)) != -1)
+    {
+        t->psname = nameExtract(table, nTableSize, r, 0, nullptr);
+    }
+    if ( ! t->psname )
+    {
+        if (!t->fileName().empty())
+        {
+            const char* pReverse = t->fileName().data() + t->fileName().length();
+            /* take only last token of filename */
+            while (pReverse != t->fileName() && *pReverse != '/') pReverse--;
+            if(*pReverse == '/') pReverse++;
+            t->psname = strdup(pReverse);
+            assert(t->psname != nullptr);
+            for (i=strlen(t->psname) - 1; i > 0; i--)
+            {
+                /*- Remove the suffix  -*/
+                if (t->psname[i] == '.' ) {
+                    t->psname[i] = 0;
+                    break;
+                }
+            }
+        }
+        else
+            t->psname = strdup( "Unknown" );
+    }
+
+    /* Font family and subfamily names: preferred Apple */
+    t->family = nullptr;
+    if ((r = findname(table, n, 0, 0, 0, 1)) != -1)
+        t->family = nameExtract(table, nTableSize, r, 1, &t->ufamily);
+    if ( ! t->family && (r = findname(table, n, 3, 1, 0x0409, 1)) != -1)
+        t->family = nameExtract(table, nTableSize, r, 1, &t->ufamily);
+    if ( ! t->family && (r = findname(table, n, 1, 0, 0, 1)) != -1)
+        t->family = nameExtract(table, nTableSize, r, 0, nullptr);
+    if ( ! t->family && (r = findname(table, n, 3, 1, 0x0411, 1)) != -1)
+        t->family = nameExtract(table, nTableSize, r, 1, &t->ufamily);
+    if ( ! t->family && (r = findname(table, n, 3, 0, 0x0409, 1)) != -1)
+        t->family = nameExtract(table, nTableSize, r, 1, &t->ufamily);
+    if ( ! t->family )
+    {
+        t->family = strdup(t->psname);
+        assert(t->family != nullptr);
+    }
+
+    t->subfamily = nullptr;
+    t->usubfamily = nullptr;
+    if ((r = findname(table, n, 1, 0, 0, 2)) != -1)
+        t->subfamily = nameExtract(table, nTableSize, r, 0, &t->usubfamily);
+    if ( ! t->subfamily && (r = findname(table, n, 3, 1, 0x0409, 2)) != -1)
+        t->subfamily = nameExtract(table, nTableSize, r, 1, &t->usubfamily);
+    if ( ! t->subfamily )
+    {
+        t->subfamily = strdup("");
+    }
+
+    /* #i60349# sanity check psname
+     * psname practically has to be 7bit ASCII and should not contain spaces
+     * there is a class of broken fonts which do not fulfill that at all, so let's try
+     * if the family name is 7bit ASCII and take it instead if so
+     */
+    /* check psname */
+    for( i = 0; t->psname[i] != 0 && bPSNameOK; i++ )
+        if( t->psname[ i ] < 33 || (t->psname[ i ] & 0x80) )
+            bPSNameOK = false;
+    if( bPSNameOK )
+        return;
+
+    /* check if family is a suitable replacement */
+    if( !(t->ufamily && t->family) )
+        return;
+
+    bool bReplace = true;
+
+    for( i = 0; t->ufamily[ i ] != 0 && bReplace; i++ )
+        if( t->ufamily[ i ] < 33 || t->ufamily[ i ] > 127 )
+            bReplace = false;
+    if( bReplace )
+    {
+        free( t->psname );
+        t->psname = strdup( t->family );
+    }
+}
+
+/*- Public functions */
+
+int CountTTCFonts(const char* fname)
+{
+    int nFonts = 0;
+    sal_uInt8 buffer[12];
+    FILE* fd = fopen(fname, "rb");
+    if( fd ) {
+        if (fread(buffer, 1, 12, fd) == 12) {
+            if(GetUInt32(buffer, 0) == T_ttcf )
+                nFonts = GetUInt32(buffer, 8);
+        }
+        fclose(fd);
+    }
+    return nFonts;
+}
+
+#if !defined(_WIN32)
+SFErrCodes OpenTTFontFile(const char* fname, sal_uInt32 facenum, TrueTypeFont** ttf,
+                          const FontCharMapRef xCharMap)
+{
+    SFErrCodes ret;
+    int fd = -1;
+    struct stat st;
+
+    if (!fname || !*fname) return SFErrCodes::BadFile;
+
+    *ttf = new TrueTypeFont(fname, xCharMap);
+    if( ! *ttf )
+        return SFErrCodes::Memory;
+
+    if( (*ttf)->fileName().empty() )
+    {
+        ret = SFErrCodes::Memory;
+        goto cleanup;
+    }
+
+    fd = open(fname, O_RDONLY);
+
+    if (fd == -1) {
+        ret = SFErrCodes::BadFile;
+        goto cleanup;
+    }
+
+    if (fstat(fd, &st) == -1) {
+        ret = SFErrCodes::FileIo;
+        goto cleanup;
+    }
+
+    (*ttf)->fsize = st.st_size;
+
+    /* On Mac OS, most likely will happen if a Mac user renames a font file
+     * to be .ttf when it's really a Mac resource-based font.
+     * Size will be 0, but fonts smaller than 4 bytes would be broken anyway.
+     */
+    if ((*ttf)->fsize == 0) {
+        ret = SFErrCodes::BadFile;
+        goto cleanup;
+    }
+
+    if (((*ttf)->ptr = static_cast<sal_uInt8 *>(mmap(nullptr, (*ttf)->fsize, PROT_READ, MAP_SHARED, fd, 0))) == MAP_FAILED) {
+        ret = SFErrCodes::Memory;
+        goto cleanup;
+    }
+
+    ret = (*ttf)->open(facenum);
+
+cleanup:
+    if (fd != -1) close(fd);
+    if (ret != SFErrCodes::Ok)
+    {
+        delete *ttf;
+        *ttf = nullptr;
+    }
+    return ret;
+}
+#endif
+
+SFErrCodes OpenTTFontBuffer(const void* pBuffer, sal_uInt32 nLen, sal_uInt32 facenum, TrueTypeFont** ttf,
+                            const FontCharMapRef xCharMap)
+{
+    *ttf = new TrueTypeFont(nullptr, xCharMap);
+    if( *ttf == nullptr )
+        return SFErrCodes::Memory;
+
+    (*ttf)->fsize = nLen;
+    (*ttf)->ptr   = const_cast<sal_uInt8 *>(static_cast<sal_uInt8 const *>(pBuffer));
+
+    SFErrCodes ret = (*ttf)->open(facenum);
+    if (ret != SFErrCodes::Ok)
+    {
+        delete *ttf;
+        *ttf = nullptr;
+    }
+    return ret;
+}
+
+namespace {
+
+bool withinBounds(sal_uInt32 tdoffset, sal_uInt32 moreoffset, sal_uInt32 len, sal_uInt32 available)
+{
+    sal_uInt32 result;
+    if (o3tl::checked_add(tdoffset, moreoffset, result))
+        return false;
+    if (o3tl::checked_add(result, len, result))
+        return false;
+    return result <= available;
+}
+}
+
+AbstractTrueTypeFont::AbstractTrueTypeFont(const char* pFileName, const FontCharMapRef xCharMap)
+    : m_nGlyphs(0xFFFFFFFF)
+    , m_nHorzMetrics(0)
+    , m_nVertMetrics(0)
+    , m_nUnitsPerEm(0)
+    , m_xCharMap(xCharMap)
+{
+    if (pFileName)
+        m_sFileName = pFileName;
+}
+
+AbstractTrueTypeFont::~AbstractTrueTypeFont()
+{
+}
+
+TrueTypeFont::TrueTypeFont(const char* pFileName, const FontCharMapRef xCharMap)
+    : AbstractTrueTypeFont(pFileName, xCharMap)
+    , fsize(-1)
+    , ptr(nullptr)
+    , psname(nullptr)
+    , family(nullptr)
+    , ufamily(nullptr)
+    , subfamily(nullptr)
+    , usubfamily(nullptr)
+    , ntables(0)
+{
+}
+
+TrueTypeFont::~TrueTypeFont()
+{
+#if !defined(_WIN32)
+    if (!fileName().empty())
+        munmap(ptr, fsize);
+#endif
+    free(psname);
+    free(family);
+    free(ufamily);
+    free(subfamily);
+    free(usubfamily);
+}
+
+void CloseTTFont(TrueTypeFont* ttf) { delete ttf; }
+
+sal_uInt32 AbstractTrueTypeFont::glyphOffset(sal_uInt32 glyphID) const
+{
+    if (m_aGlyphOffsets.empty()) // the O_CFF and Bitmap cases
+        return 0;
+    return m_aGlyphOffsets[glyphID];
+}
+
+SFErrCodes AbstractTrueTypeFont::indexGlyphData()
+{
+    if (!(hasTable(O_maxp) && hasTable(O_head) && hasTable(O_name) && hasTable(O_cmap)))
+        return SFErrCodes::TtFormat;
+
+    sal_uInt32 table_size;
+    const sal_uInt8* table = this->table(O_maxp, table_size);
+    m_nGlyphs = table_size >= 6 ? GetUInt16(table, 4) : 0;
+
+    table = this->table(O_head, table_size);
+    if (table_size < HEAD_Length)
+        return SFErrCodes::TtFormat;
+
+    m_nUnitsPerEm = GetUInt16(table, HEAD_unitsPerEm_offset);
+    int indexfmt = GetInt16(table, HEAD_indexToLocFormat_offset);
+
+    if (((indexfmt != 0) && (indexfmt != 1)) || (m_nUnitsPerEm <= 0))
+        return SFErrCodes::TtFormat;
+
+    if (hasTable(O_glyf) && (table = this->table(O_loca, table_size))) /* TTF or TTF-OpenType */
+    {
+        int k = (table_size / (indexfmt ? 4 : 2)) - 1;
+        if (k < static_cast<int>(m_nGlyphs))       /* Hack for broken Chinese fonts */
+            m_nGlyphs = k;
+
+        m_aGlyphOffsets.clear();
+        m_aGlyphOffsets.reserve(m_nGlyphs + 1);
+        for (int i = 0; i <= static_cast<int>(m_nGlyphs); ++i)
+            m_aGlyphOffsets.push_back(indexfmt ? GetUInt32(table, i << 2) : static_cast<sal_uInt32>(GetUInt16(table, i << 1)) << 1);
+    }
+    else if (this->table(O_CFF, table_size)) /* PS-OpenType */
+    {
+        int k = (table_size / 2) - 1; /* set a limit here, presumably much lower than the table size, but establishes some sort of physical bound */
+        if (k < static_cast<int>(m_nGlyphs))
+            m_nGlyphs = k;
+
+        m_aGlyphOffsets.clear();
+        /* TODO: implement to get subsetting */
+    }
+    else {
+        // Bitmap font, accept for now.
+        m_aGlyphOffsets.clear();
+        /* TODO: implement to get subsetting */
+    }
+
+    table = this->table(O_hhea, table_size);
+    m_nHorzMetrics = (table && table_size >= 36) ? GetUInt16(table, 34) : 0;
+
+    table = this->table(O_vhea, table_size);
+    m_nVertMetrics = (table && table_size >= 36) ? GetUInt16(table, 34) : 0;
+
+    if (!m_xCharMap.is())
+    {
+        CmapResult aCmapResult;
+        table = this->table(O_cmap, table_size);
+        if (!ParseCMAP(table, table_size, aCmapResult))
+            return SFErrCodes::TtFormat;
+        m_xCharMap = new FontCharMap(aCmapResult);
+    }
+
+    return SFErrCodes::Ok;
+}
+
+SFErrCodes TrueTypeFont::open(sal_uInt32 facenum)
+{
+    if (fsize < 4)
+        return SFErrCodes::TtFormat;
+
+    int i;
+    sal_uInt32 length, tag;
+    sal_uInt32 tdoffset = 0;        /* offset to TableDirectory in a TTC file. For TTF files is 0 */
+
+    sal_uInt32 TTCTag = GetInt32(ptr, 0);
+
+    if ((TTCTag == 0x00010000) || (TTCTag == T_true)) {
+        tdoffset = 0;
+    } else if (TTCTag == T_otto) {                         /* PS-OpenType font */
+        tdoffset = 0;
+    } else if (TTCTag == T_ttcf) {                         /* TrueType collection */
+        if (!withinBounds(12, 4 * facenum, sizeof(sal_uInt32), fsize))
+            return SFErrCodes::FontNo;
+        sal_uInt32 Version = GetUInt32(ptr, 4);
+        if (Version != 0x00010000 && Version != 0x00020000) {
+            return SFErrCodes::TtFormat;
+        }
+        if (facenum >= GetUInt32(ptr, 8))
+            return SFErrCodes::FontNo;
+        tdoffset = GetUInt32(ptr, 12 + 4 * facenum);
+    } else {
+        return SFErrCodes::TtFormat;
+    }
+
+    if (withinBounds(tdoffset, 0, 4 + sizeof(sal_uInt16), fsize))
+        ntables = GetUInt16(ptr + tdoffset, 4);
+
+    if (ntables >= 128 || ntables == 0)
+        return SFErrCodes::TtFormat;
+
+    /* parse the tables */
+    for (i = 0; i < static_cast<int>(ntables); i++)
+    {
+        int nIndex;
+        const sal_uInt32 nStart = tdoffset + 12;
+        const sal_uInt32 nOffset = 16 * i;
+        if (withinBounds(nStart, nOffset, sizeof(sal_uInt32), fsize))
+            tag = GetUInt32(ptr + nStart, nOffset);
+        else
+            tag = static_cast<sal_uInt32>(-1);
+        switch( tag ) {
+            case T_maxp: nIndex = O_maxp; break;
+            case T_glyf: nIndex = O_glyf; break;
+            case T_head: nIndex = O_head; break;
+            case T_loca: nIndex = O_loca; break;
+            case T_name: nIndex = O_name; break;
+            case T_hhea: nIndex = O_hhea; break;
+            case T_hmtx: nIndex = O_hmtx; break;
+            case T_cmap: nIndex = O_cmap; break;
+            case T_vhea: nIndex = O_vhea; break;
+            case T_vmtx: nIndex = O_vmtx; break;
+            case T_OS2 : nIndex = O_OS2;  break;
+            case T_post: nIndex = O_post; break;
+            case T_cvt : nIndex = O_cvt;  break;
+            case T_prep: nIndex = O_prep; break;
+            case T_fpgm: nIndex = O_fpgm; break;
+            case T_gsub: nIndex = O_gsub; break;
+            case T_CFF:  nIndex = O_CFF; break;
+            default: nIndex = -1; break;
+        }
+
+        if ((nIndex >= 0) && withinBounds(nStart, nOffset, 12 + sizeof(sal_uInt32), fsize))
+        {
+            sal_uInt32 nTableOffset = GetUInt32(ptr + nStart, nOffset + 8);
+            length = GetUInt32(ptr + nStart, nOffset + 12);
+            m_aTableList[nIndex].pData = ptr + nTableOffset;
+            m_aTableList[nIndex].nSize = length;
+        }
+    }
+
+    /* Fixup offsets when only a TTC extract was provided */
+    if (facenum == sal_uInt32(~0))
+    {
+        sal_uInt8* pHead = const_cast<sal_uInt8*>(m_aTableList[O_head].pData);
+        if (!pHead)
+            return SFErrCodes::TtFormat;
+
+        /* limit Head candidate to TTC extract's limits */
+        if (pHead > ptr + (fsize - 54))
+            pHead = ptr + (fsize - 54);
+
+        /* TODO: find better method than searching head table's magic */
+        sal_uInt8* p = nullptr;
+        for (p = pHead + 12; p > ptr; --p)
+        {
+            if( p[0]==0x5F && p[1]==0x0F && p[2]==0x3C && p[3]==0xF5 ) {
+                int nDelta = (pHead + 12) - p;
+                if( nDelta )
+                    for( int j = 0; j < NUM_TAGS; ++j )
+                        if (hasTable(j))
+                            m_aTableList[j].pData -= nDelta;
+                break;
+            }
+        }
+        if (p <= ptr)
+            return SFErrCodes::TtFormat;
+    }
+
+    /* Check the table offsets after TTC correction */
+    for (i=0; i<NUM_TAGS; i++) {
+        /* sanity check: table must lay completely within the file
+         * at this point one could check the checksum of all contained
+         * tables, but this would be quite time intensive.
+         * Try to fix tables, so we can cope with minor problems.
+         */
+
+        if (m_aTableList[i].pData < ptr)
+        {
+#if OSL_DEBUG_LEVEL > 1
+            SAL_WARN_IF(m_aTableList[i].pData, "vcl.fonts", "font file " << fileName()
+                    << " has bad table offset "
+                    << (sal_uInt8*)m_aTableList[i].pData - ptr
+                    << "d (tagnum=" << i << ").");
+#endif
+            m_aTableList[i].nSize = 0;
+            m_aTableList[i].pData = nullptr;
+        }
+        else if (const_cast<sal_uInt8*>(m_aTableList[i].pData) + m_aTableList[i].nSize > ptr + fsize)
+        {
+            sal_PtrDiff nMaxLen = (ptr + fsize) - m_aTableList[i].pData;
+            if( nMaxLen < 0 )
+                nMaxLen = 0;
+            m_aTableList[i].nSize = nMaxLen;
+#if OSL_DEBUG_LEVEL > 1
+            SAL_WARN("vcl.fonts", "font file " << fileName()
+                    << " has too big table (tagnum=" << i << ").");
+#endif
+        }
+    }
+
+    /* At this point TrueTypeFont is constructed, now need to verify the font format
+       and read the basic font properties */
+
+    SFErrCodes ret = indexGlyphData();
+    if (ret != SFErrCodes::Ok)
+        return ret;
+
+    GetNames(this);
+
+    return SFErrCodes::Ok;
+}
+
+int GetTTGlyphPoints(AbstractTrueTypeFont *ttf, sal_uInt32 glyphID, ControlPoint **pointArray)
+{
+    return GetTTGlyphOutline(ttf, glyphID, pointArray, nullptr, nullptr);
+}
+
+int GetTTGlyphComponents(AbstractTrueTypeFont *ttf, sal_uInt32 glyphID, std::vector< sal_uInt32 >& glyphlist)
+{
+    int n = 1;
+
+    if (glyphID >= ttf->glyphCount())
+        return 0;
+
+    sal_uInt32 glyflength;
+    const sal_uInt8* glyf = ttf->table(O_glyf, glyflength);
+
+    sal_uInt32 nNextOffset = ttf->glyphOffset(glyphID + 1);
+    if (nNextOffset > glyflength)
+        return 0;
+
+    sal_uInt32 nOffset = ttf->glyphOffset(glyphID);
+    if (nOffset > nNextOffset)
+        return 0;
+
+    const sal_uInt8* ptr = glyf + nOffset;
+    const sal_uInt8* nptr = glyf + nNextOffset;
+    if (nptr < ptr)
+        return 0;
+
+    if (std::find(glyphlist.begin(), glyphlist.end(), glyphID) != glyphlist.end())
+    {
+        SAL_WARN("vcl.fonts", "Endless loop found in a compound glyph.");
+        return 0;
+    }
+
+    glyphlist.push_back( glyphID );
+
+    // Empty glyph.
+    if (nptr == ptr)
+        return n;
+
+    sal_uInt32 nRemainingData = glyflength - nOffset;
+
+    if (nRemainingData >= 10 && GetInt16(ptr, 0) == -1) {
+        sal_uInt16 flags, index;
+        ptr += 10;
+        nRemainingData -= 10;
+        do {
+            if (nRemainingData < 4)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                break;
+            }
+            flags = GetUInt16(ptr, 0);
+            index = GetUInt16(ptr, 2);
+
+            ptr += 4;
+            nRemainingData -= 4;
+            n += GetTTGlyphComponents(ttf, index, glyphlist);
+
+            sal_uInt32 nAdvance;
+            if (flags & ARG_1_AND_2_ARE_WORDS) {
+                nAdvance = 4;
+            } else {
+                nAdvance = 2;
+            }
+
+            if (flags & WE_HAVE_A_SCALE) {
+                nAdvance += 2;
+            } else if (flags & WE_HAVE_AN_X_AND_Y_SCALE) {
+                nAdvance += 4;
+            } else if (flags & WE_HAVE_A_TWO_BY_TWO) {
+                nAdvance += 8;
+            }
+            if (nRemainingData < nAdvance)
+            {
+                SAL_WARN("vcl.fonts", "short read");
+                break;
+            }
+            ptr += nAdvance;
+            nRemainingData -= nAdvance;
+        } while (flags & MORE_COMPONENTS);
+    }
+
+    return n;
+}
+
+SFErrCodes CreateT3FromTTGlyphs(TrueTypeFont *ttf, FILE *outf, const char *fname,
+                          sal_uInt16 const *glyphArray, sal_uInt8 *encoding, int nGlyphs,
+                          int wmode)
+{
+    ControlPoint *pa;
+    PSPathElement *path;
+    int i, j, n;
+    sal_uInt32 nSize;
+    const sal_uInt8* table = ttf->table(O_head, nSize);
+    TTGlyphMetrics metrics;
+    int UPEm = ttf->unitsPerEm();
+
+    const char * const h01 = "%%!PS-AdobeFont-%d.%d-%d.%d\n";
+    const char * const h02 = "%% Creator: %s %s %s\n";
+    const char * const h09 = "%% Original font name: %s\n";
+
+    const char * const h10 =
+        "30 dict begin\n"
+        "/PaintType 0 def\n"
+        "/FontType 3 def\n"
+        "/StrokeWidth 0 def\n";
+
+    const char * const h11 = "/FontName (%s) cvn def\n";
+
+    /*
+      const char *h12 = "%/UniqueID %d def\n";
+    */
+    const char * const h13 = "/FontMatrix [.001 0 0 .001 0 0] def\n";
+    const char * const h14 = "/FontBBox [%d %d %d %d] def\n";
+
+    const char * const h15=
+        "/Encoding 256 array def\n"
+        "    0 1 255 {Encoding exch /.notdef put} for\n";
+
+    const char * const h16 = "    Encoding %d /glyph%d put\n";
+    const char * const h17 = "/XUID [103 0 0 16#%08" SAL_PRIXUINT32 " %d 16#%08" SAL_PRIXUINT32 " 16#%08" SAL_PRIXUINT32 "] def\n";
+
+    const char * const h30 = "/CharProcs %d dict def\n";
+    const char * const h31 = "  CharProcs begin\n";
+    const char * const h32 = "    /.notdef {} def\n";
+    const char * const h33 = "    /glyph%d {\n";
+    const char * const h34 = "    } bind def\n";
+    const char * const h35 = "  end\n";
+
+    const char * const h40 =
+        "/BuildGlyph {\n"
+        "  exch /CharProcs get exch\n"
+        "  2 copy known not\n"
+        "    {pop /.notdef} if\n"
+        "  get exec\n"
+        "} bind def\n"
+        "/BuildChar {\n"
+        "  1 index /Encoding get exch get\n"
+        "  1 index /BuildGlyph get exec\n"
+        "} bind def\n"
+        "currentdict end\n";
+
+    const char * const h41 = "(%s) cvn exch definefont pop\n";
+
+    if ((nGlyphs <= 0) || (nGlyphs > 256)) return SFErrCodes::GlyphNum;
+    if (!glyphArray) return SFErrCodes::BadArg;
+    if (!fname) fname = ttf->psname;
+
+    fprintf(outf, h01, GetInt16(table, 0), GetUInt16(table, 2), GetInt16(table, 4), GetUInt16(table, 6));
+    fprintf(outf, h02, modname, modver, modextra);
+    fprintf(outf, h09, ttf->psname);
+
+    fprintf(outf, "%s", h10);
+    fprintf(outf, h11, fname);
+/*    fprintf(outf, h12, 4000000); */
+
+    /* XUID generation:
+     * 103 0 0 C1 C2 C3 C4
+     * C1 - CRC-32 of the entire source TrueType font
+     * C2 - number of glyphs in the subset
+     * C3 - CRC-32 of the glyph array
+     * C4 - CRC-32 of the encoding array
+     *
+     * All CRC-32 numbers are presented as hexadecimal numbers
+     */
+
+    fprintf(outf, h17, rtl_crc32(0, ttf->ptr, ttf->fsize), nGlyphs, rtl_crc32(0, glyphArray, nGlyphs * 2), rtl_crc32(0, encoding, nGlyphs));
+    fprintf(outf, "%s", h13);
+    fprintf(outf, h14, XUnits(UPEm, GetInt16(table, 36)), XUnits(UPEm, GetInt16(table, 38)), XUnits(UPEm, GetInt16(table, 40)), XUnits(UPEm, GetInt16(table, 42)));
+    fprintf(outf, "%s", h15);
+
+    for (i = 0; i < nGlyphs; i++) {
+        fprintf(outf, h16, encoding[i], i);
+    }
+
+    fprintf(outf, h30, nGlyphs+1);
+    fprintf(outf, "%s", h31);
+    fprintf(outf, "%s", h32);
+
+    for (i = 0; i < nGlyphs; i++) {
+        fprintf(outf, h33, i);
+        int r = GetTTGlyphOutline(ttf, glyphArray[i] < ttf->glyphCount() ? glyphArray[i] : 0, &pa, &metrics, nullptr);
+
+        if (r > 0) {
+            n =  BSplineToPSPath(pa, r, &path);
+        } else {
+            n = 0;                      /* glyph might have zero contours but valid metrics ??? */
+            path = nullptr;
+            if (r < 0) {                /* glyph is not present in the font - pa array was not allocated, so no need to free it */
+                continue;
+            }
+        }
+        fprintf(outf, "\t%d %d %d %d %d %d setcachedevice\n",
+                wmode == 0 ? XUnits(UPEm, metrics.aw) : 0,
+                wmode == 0 ? 0 : -XUnits(UPEm, metrics.ah),
+                XUnits(UPEm, metrics.xMin),
+                XUnits(UPEm, metrics.yMin),
+                XUnits(UPEm, metrics.xMax),
+                XUnits(UPEm, metrics.yMax));
+
+        for (j = 0; j < n; j++)
+        {
+            switch (path[j].type)
+            {
+                case PS_MOVETO:
+                    fprintf(outf, "\t%d %d moveto\n", XUnits(UPEm, path[j].x1), XUnits(UPEm, path[j].y1));
+                    break;
+
+                case PS_LINETO:
+                    fprintf(outf, "\t%d %d lineto\n", XUnits(UPEm, path[j].x1), XUnits(UPEm, path[j].y1));
+                    break;
+
+                case PS_CURVETO:
+                    fprintf(outf, "\t%d %d %d %d %d %d curveto\n", XUnits(UPEm, path[j].x1), XUnits(UPEm, path[j].y1), XUnits(UPEm, path[j].x2), XUnits(UPEm, path[j].y2), XUnits(UPEm, path[j].x3), XUnits(UPEm, path[j].y3));
+                    break;
+
+                case PS_CLOSEPATH:
+                    fprintf(outf, "\tclosepath\n");
+                    break;
+                case PS_NOOP:
+                    break;
+            }
+        }
+        if (n > 0) fprintf(outf, "\tfill\n");     /* if glyph is not a whitespace character */
+
+        fprintf(outf, "%s", h34);
+
+        free(pa);
+        free(path);
+    }
+    fprintf(outf, "%s", h35);
+
+    fprintf(outf, "%s", h40);
+    fprintf(outf, h41, fname);
+
+    return SFErrCodes::Ok;
+}
+
+SFErrCodes CreateTTFromTTGlyphs(AbstractTrueTypeFont  *ttf,
+                          const char    *fname,
+                          sal_uInt16 const *glyphArray,
+                          sal_uInt8 const *encoding,
+                          int            nGlyphs)
+{
+    TrueTypeCreator *ttcr;
+    TrueTypeTable *head=nullptr, *hhea=nullptr, *maxp=nullptr, *cvt=nullptr, *prep=nullptr, *glyf=nullptr, *fpgm=nullptr, *cmap=nullptr, *name=nullptr, *post = nullptr, *os2 = nullptr;
+    int i;
+    SFErrCodes res;
+
+    TrueTypeCreatorNewEmpty(T_true, &ttcr);
+
+    /**                       name                         **/
+
+    NameRecord *names = nullptr;
+    int n = GetTTNameRecords(ttf, &names);
+    name = TrueTypeTableNew_name(n, names);
+    DisposeNameRecords(names, n);
+
+    /**                       maxp                         **/
+    sal_uInt32 nTableSize;
+    const sal_uInt8* p = ttf->table(O_maxp, nTableSize);
+    maxp = TrueTypeTableNew_maxp(p, nTableSize);
+
+    /**                       hhea                         **/
+    p = ttf->table(O_hhea, nTableSize);
+    if (p && nTableSize >= HHEA_caretSlopeRun_offset + 2)
+        hhea = TrueTypeTableNew_hhea(GetInt16(p, HHEA_ascender_offset), GetInt16(p, HHEA_descender_offset), GetInt16(p, HHEA_lineGap_offset), GetInt16(p, HHEA_caretSlopeRise_offset), GetInt16(p, HHEA_caretSlopeRun_offset));
+    else
+        hhea = TrueTypeTableNew_hhea(0, 0, 0, 0, 0);
+
+    /**                       head                         **/
+
+    p = ttf->table(O_head, nTableSize);
+    assert(p != nullptr);
+    head = TrueTypeTableNew_head(GetInt32(p, HEAD_fontRevision_offset),
+                                 GetUInt16(p, HEAD_flags_offset),
+                                 GetUInt16(p, HEAD_unitsPerEm_offset),
+                                 p+HEAD_created_offset,
+                                 GetUInt16(p, HEAD_macStyle_offset),
+                                 GetUInt16(p, HEAD_lowestRecPPEM_offset),
+                                 GetInt16(p, HEAD_fontDirectionHint_offset));
+
+    /**                       glyf                          **/
+
+    glyf = TrueTypeTableNew_glyf();
+    sal_uInt32* gID = static_cast<sal_uInt32*>(scalloc(nGlyphs, sizeof(sal_uInt32)));
+
+    for (i = 0; i < nGlyphs; i++) {
+        gID[i] = glyfAdd(glyf, GetTTRawGlyphData(ttf, glyphArray[i]), ttf);
+    }
+
+    /**                       cmap                          **/
+    cmap = TrueTypeTableNew_cmap();
+
+    for (i=0; i < nGlyphs; i++) {
+        cmapAdd(cmap, 0x010000, encoding[i], gID[i]);
+    }
+
+    /**                       cvt                           **/
+    if ((p = ttf->table(O_cvt, nTableSize)) != nullptr)
+        cvt = TrueTypeTableNew(T_cvt, nTableSize, p);
+
+    /**                       prep                          **/
+    if ((p = ttf->table(O_prep, nTableSize)) != nullptr)
+        prep = TrueTypeTableNew(T_prep, nTableSize, p);
+
+    /**                       fpgm                          **/
+    if ((p = ttf->table(O_fpgm, nTableSize)) != nullptr)
+        fpgm = TrueTypeTableNew(T_fpgm, nTableSize, p);
+
+    /**                       post                          **/
+    if ((p = ttf->table(O_post, nTableSize)) != nullptr)
+    {
+        sal_Int32 nItalic = (POST_italicAngle_offset + 4 < nTableSize) ?
+            GetInt32(p, POST_italicAngle_offset) : 0;
+        sal_Int16 nPosition = (POST_underlinePosition_offset + 2 < nTableSize) ?
+            GetInt16(p, POST_underlinePosition_offset) : 0;
+        sal_Int16 nThickness = (POST_underlineThickness_offset + 2 < nTableSize) ?
+            GetInt16(p, POST_underlineThickness_offset) : 0;
+        sal_uInt32 nFixedPitch = (POST_isFixedPitch_offset + 4 < nTableSize) ?
+            GetUInt32(p, POST_isFixedPitch_offset) : 0;
+
+        post = TrueTypeTableNew_post(0x00030000,
+                                     nItalic, nPosition,
+                                     nThickness, nFixedPitch);
+    }
+    else
+        post = TrueTypeTableNew_post(0x00030000, 0, 0, 0, 0);
+
+    AddTable(ttcr, name); AddTable(ttcr, maxp); AddTable(ttcr, hhea);
+    AddTable(ttcr, head); AddTable(ttcr, glyf); AddTable(ttcr, cmap);
+    AddTable(ttcr, cvt ); AddTable(ttcr, prep); AddTable(ttcr, fpgm);
+    AddTable(ttcr, post); AddTable(ttcr, os2);
+
+    res = StreamToFile(ttcr, fname);
+#if OSL_DEBUG_LEVEL > 1
+    SAL_WARN_IF(res != SFErrCodes::Ok, "vcl.fonts", "StreamToFile: error code: "
+            << (int) res << ".");
+#endif
+
+    TrueTypeCreatorDispose(ttcr);
+    free(gID);
+
+    return res;
+}
+
+static GlyphOffsets *GlyphOffsetsNew(sal_uInt8 *sfntP, sal_uInt32 sfntLen)
+{
+    GlyphOffsets* res = static_cast<GlyphOffsets*>(smalloc(sizeof(GlyphOffsets)));
+    sal_uInt8 *loca = nullptr;
+    sal_uInt16 numTables = GetUInt16(sfntP, 4);
+    sal_uInt32 locaLen = 0;
+    sal_Int16 indexToLocFormat = 0;
+
+    sal_uInt32 nMaxPossibleTables = sfntLen / (3*sizeof(sal_uInt32)); /*the three GetUInt32 calls*/
+    if (numTables > nMaxPossibleTables)
+    {
+        SAL_WARN( "vcl.fonts", "GlyphOffsetsNew claimed to have "
+            << numTables  << " tables, but that's impossibly large");
+        numTables = nMaxPossibleTables;
+    }
+
+    for (sal_uInt16 i = 0; i < numTables; i++) {
+        sal_uInt32 nLargestFixedOffsetPos = 12 + 16 * i + 12;
+        sal_uInt32 nMinSize = nLargestFixedOffsetPos + sizeof(sal_uInt32);
+        if (nMinSize > sfntLen)
+        {
+            SAL_WARN( "vcl.fonts", "GlyphOffsetsNew claimed to have "
+                << numTables  << " tables, but only space for " << i);
+            break;
+        }
+
+        sal_uInt32 tag = GetUInt32(sfntP, 12 + 16 * i);
+        sal_uInt32 off = GetUInt32(sfntP, 12 + 16 * i + 8);
+        sal_uInt32 len = GetUInt32(sfntP, nLargestFixedOffsetPos);
+
+        if (tag == T_loca) {
+            loca = sfntP + off;
+            locaLen = len;
+        } else if (tag == T_head) {
+            indexToLocFormat = GetInt16(sfntP + off, 50);
+        }
+    }
+
+    res->nGlyphs = locaLen / ((indexToLocFormat == 1) ? 4 : 2);
+    assert(res->nGlyphs != 0);
+    res->offs = static_cast<sal_uInt32*>(scalloc(res->nGlyphs, sizeof(sal_uInt32)));
+
+    for (sal_uInt32 i = 0; i < res->nGlyphs; i++) {
+        if (indexToLocFormat == 1) {
+            res->offs[i] = GetUInt32(loca, i * 4);
+        } else {
+            res->offs[i] = GetUInt16(loca, i * 2) << 1;
+        }
+    }
+    return res;
+}
+
+static void GlyphOffsetsDispose(GlyphOffsets *_this)
+{
+    if (_this) {
+        free(_this->offs);
+        free(_this);
+    }
+}
+
+static void DumpSfnts(FILE *outf, sal_uInt8 *sfntP, sal_uInt32 sfntLen)
+{
+    if (sfntLen < 12)
+    {
+        SAL_WARN( "vcl.fonts", "DumpSfnts sfntLen is too short: "
+            << sfntLen << " legal min is: " << 12);
+        return;
+    }
+
+    const sal_uInt32 nSpaceForTables = sfntLen - 12;
+    const sal_uInt32 nTableSize = 16;
+    const sal_uInt32 nMaxPossibleTables = nSpaceForTables/nTableSize;
+
+    HexFmt *h = HexFmtNew(outf);
+    sal_uInt16 i, numTables = GetUInt16(sfntP, 4);
+    GlyphOffsets *go = GlyphOffsetsNew(sfntP, sfntLen);
+    sal_uInt8 const pad[] = {0,0,0,0};                     /* zeroes                       */
+
+    if (numTables > nMaxPossibleTables)
+    {
+        SAL_WARN( "vcl.fonts", "DumpSfnts claimed to have "
+            << numTables  << " tables, but only space for " << nMaxPossibleTables);
+        numTables = nMaxPossibleTables;
+    }
+
+    assert(numTables <= 9);                                 /* Type42 has 9 required tables */
+
+    sal_uInt32* offs = static_cast<sal_uInt32*>(scalloc(numTables, sizeof(sal_uInt32)));
+
+    fputs("/sfnts [", outf);
+    HexFmtOpenString(h);
+    HexFmtBlockWrite(h, sfntP, 12);                         /* stream out the Offset Table    */
+    HexFmtBlockWrite(h, sfntP+12, 16 * numTables);          /* stream out the Table Directory */
+
+    for (i=0; i<numTables; i++)
+    {
+        sal_uInt32 nLargestFixedOffsetPos = 12 + 16 * i + 12;
+        sal_uInt32 nMinSize = nLargestFixedOffsetPos + sizeof(sal_uInt32);
+        if (nMinSize > sfntLen)
+        {
+            SAL_WARN( "vcl.fonts", "DumpSfnts claimed to have "
+                << numTables  << " tables, but only space for " << i);
+            break;
+        }
+
+        sal_uInt32 tag = GetUInt32(sfntP, 12 + 16 * i);
+        sal_uInt32 off = GetUInt32(sfntP, 12 + 16 * i + 8);
+        if (off > sfntLen)
+        {
+            SAL_WARN( "vcl.fonts", "DumpSfnts claims offset of "
+                << off << " but max possible is " << sfntLen);
+            break;
+        }
+        sal_uInt8 *pRecordStart = sfntP + off;
+        sal_uInt32 len = GetUInt32(sfntP, nLargestFixedOffsetPos);
+        sal_uInt32 nMaxLenPossible = sfntLen - off;
+        if (len > nMaxLenPossible)
+        {
+            SAL_WARN( "vcl.fonts", "DumpSfnts claims len of "
+                << len << " but only space for " << nMaxLenPossible);
+            break;
+        }
+
+        if (tag != T_glyf)
+        {
+            HexFmtBlockWrite(h, pRecordStart, len);
+        }
+        else
+        {
+            sal_uInt8 *glyf = pRecordStart;
+            sal_uInt8 *eof = pRecordStart + nMaxLenPossible;
+            for (sal_uInt32 j = 0; j < go->nGlyphs - 1; j++)
+            {
+                sal_uInt32 nStartOffset = go->offs[j];
+                sal_uInt8 *pSubRecordStart = glyf + nStartOffset;
+                if (pSubRecordStart > eof)
+                {
+                    SAL_WARN( "vcl.fonts", "DumpSfnts start glyf claims offset of "
+                        << pSubRecordStart - sfntP << " but max possible is " << eof - sfntP);
+                    break;
+                }
+
+                sal_uInt32 nEndOffset = go->offs[j + 1];
+                sal_uInt8 *pSubRecordEnd = glyf + nEndOffset;
+                if (pSubRecordEnd > eof)
+                {
+                    SAL_WARN( "vcl.fonts", "DumpSfnts end glyf offset of "
+                        << pSubRecordEnd - sfntP << " but max possible is " << eof - sfntP);
+                    break;
+                }
+
+                sal_uInt32 l = pSubRecordEnd - pSubRecordStart;
+                HexFmtBlockWrite(h, pSubRecordStart, l);
+            }
+        }
+        HexFmtBlockWrite(h, pad, (4 - (len & 3)) & 3);
+    }
+    HexFmtCloseString(h);
+    fputs("] def\n", outf);
+    GlyphOffsetsDispose(go);
+    HexFmtDispose(h);
+    free(offs);
+}
+
+SFErrCodes CreateT42FromTTGlyphs(TrueTypeFont  *ttf,
+                           FILE          *outf,
+                           const char    *psname,
+                           sal_uInt16 const *glyphArray,
+                           sal_uInt8          *encoding,
+                           int            nGlyphs)
+{
+    TrueTypeCreator *ttcr;
+    TrueTypeTable *head=nullptr, *hhea=nullptr, *maxp=nullptr, *cvt=nullptr, *prep=nullptr, *glyf=nullptr, *fpgm=nullptr;
+    int i;
+    SFErrCodes res;
+
+    sal_uInt16 ver;
+    sal_Int32 rev;
+
+    sal_uInt8 *sfntP;
+    sal_uInt32 sfntLen;
+    int UPEm = ttf->unitsPerEm();
+
+    if (nGlyphs >= 256) return SFErrCodes::GlyphNum;
+
+    assert(psname != nullptr);
+
+    TrueTypeCreatorNewEmpty(T_true, &ttcr);
+
+    /*                        head                          */
+    sal_uInt32 nTableSize;
+    const sal_uInt8* p = ttf->table(O_head, nTableSize);
+    const sal_uInt8* headP = p;
+    assert(p != nullptr);
+    head = TrueTypeTableNew_head(GetInt32(p, HEAD_fontRevision_offset), GetUInt16(p, HEAD_flags_offset), GetUInt16(p, HEAD_unitsPerEm_offset), p+HEAD_created_offset, GetUInt16(p, HEAD_macStyle_offset), GetUInt16(p, HEAD_lowestRecPPEM_offset), GetInt16(p, HEAD_fontDirectionHint_offset));
+    ver = GetUInt16(p, HEAD_majorVersion_offset);
+    rev = GetInt32(p, HEAD_fontRevision_offset);
+
+    /**                       hhea                         **/
+    p = ttf->table(O_hhea, nTableSize);
+    if (p)
+        hhea = TrueTypeTableNew_hhea(GetInt16(p, HHEA_ascender_offset), GetInt16(p, HHEA_descender_offset), GetInt16(p, HHEA_lineGap_offset), GetInt16(p, HHEA_caretSlopeRise_offset), GetInt16(p, HHEA_caretSlopeRun_offset));
+    else
+        hhea = TrueTypeTableNew_hhea(0, 0, 0, 0, 0);
+
+    /**                       maxp                         **/
+    p = ttf->table(O_maxp, nTableSize);
+    maxp = TrueTypeTableNew_maxp(p, nTableSize);
+
+    /**                       cvt                           **/
+    if ((p = ttf->table(O_cvt, nTableSize)) != nullptr)
+        cvt = TrueTypeTableNew(T_cvt, nTableSize, p);
+
+    /**                       prep                          **/
+    if ((p = ttf->table(O_prep, nTableSize)) != nullptr)
+        prep = TrueTypeTableNew(T_prep, nTableSize, p);
+
+    /**                       fpgm                          **/
+    if ((p = ttf->table(O_fpgm, nTableSize)) != nullptr)
+        fpgm = TrueTypeTableNew(T_fpgm, nTableSize, p);
+
+    /**                       glyf                          **/
+    glyf = TrueTypeTableNew_glyf();
+    sal_uInt16* gID = static_cast<sal_uInt16*>(scalloc(nGlyphs, sizeof(sal_uInt32)));
+
+    for (i = 0; i < nGlyphs; i++) {
+        gID[i] = static_cast<sal_uInt16>(glyfAdd(glyf, GetTTRawGlyphData(ttf, glyphArray[i]), ttf));
+    }
+
+    AddTable(ttcr, head); AddTable(ttcr, hhea); AddTable(ttcr, maxp); AddTable(ttcr, cvt);
+    AddTable(ttcr, prep); AddTable(ttcr, glyf); AddTable(ttcr, fpgm);
+
+    if ((res = StreamToMemory(ttcr, &sfntP, &sfntLen)) != SFErrCodes::Ok) {
+        TrueTypeCreatorDispose(ttcr);
+        free(gID);
+        return res;
+    }
+
+    fprintf(outf, "%%!PS-TrueTypeFont-%d.%d-%d.%d\n", static_cast<int>(ver), static_cast<int>(ver & 0xFF), static_cast<int>(rev>>16), static_cast<int>(rev & 0xFFFF));
+    fprintf(outf, "%%%%Creator: %s %s %s\n", modname, modver, modextra);
+    fprintf(outf, "%%- Font subset generated from a source font file: '%s'\n", ttf->fileName().data());
+    fprintf(outf, "%%- Original font name: %s\n", ttf->psname);
+    fprintf(outf, "%%- Original font family: %s\n", ttf->family);
+    fprintf(outf, "%%- Original font sub-family: %s\n", ttf->subfamily);
+    fprintf(outf, "11 dict begin\n");
+    fprintf(outf, "/FontName (%s) cvn def\n", psname);
+    fprintf(outf, "/PaintType 0 def\n");
+    fprintf(outf, "/FontMatrix [1 0 0 1 0 0] def\n");
+    fprintf(outf, "/FontBBox [%d %d %d %d] def\n", XUnits(UPEm, GetInt16(headP, HEAD_xMin_offset)), XUnits(UPEm, GetInt16(headP, HEAD_yMin_offset)), XUnits(UPEm, GetInt16(headP, HEAD_xMax_offset)), XUnits(UPEm, GetInt16(headP, HEAD_yMax_offset)));
+    fprintf(outf, "/FontType 42 def\n");
+    fprintf(outf, "/Encoding 256 array def\n");
+    fprintf(outf, "    0 1 255 {Encoding exch /.notdef put} for\n");
+
+    for (i = 1; i<nGlyphs; i++) {
+        fprintf(outf, "Encoding %d /glyph%u put\n", encoding[i], gID[i]);
+    }
+    fprintf(outf, "/XUID [103 0 1 16#%08X %u 16#%08X 16#%08X] def\n", static_cast<unsigned int>(rtl_crc32(0, ttf->ptr, ttf->fsize)), static_cast<unsigned int>(nGlyphs), static_cast<unsigned int>(rtl_crc32(0, glyphArray, nGlyphs * 2)), static_cast<unsigned int>(rtl_crc32(0, encoding, nGlyphs)));
+
+    DumpSfnts(outf, sfntP, sfntLen);
+
+    /* dump charstrings */
+    fprintf(outf, "/CharStrings %d dict dup begin\n", nGlyphs);
+    fprintf(outf, "/.notdef 0 def\n");
+    for (i = 1; i < static_cast<int>(glyfCount(glyf)); i++) {
+        fprintf(outf,"/glyph%d %d def\n", i, i);
+    }
+    fprintf(outf, "end readonly def\n");
+
+    fprintf(outf, "FontName currentdict end definefont pop\n");
+    TrueTypeCreatorDispose(ttcr);
+    free(gID);
+    free(sfntP);
+    return SFErrCodes::Ok;
+}
+
+std::unique_ptr<sal_uInt16[]> GetTTSimpleGlyphMetrics(AbstractTrueTypeFont const *ttf, const sal_uInt16 *glyphArray, int nGlyphs, bool vertical)
+{
+    const sal_uInt8* pTable;
+    sal_uInt32 n;
+    sal_uInt32 nTableSize;
+
+    if (!vertical)
+    {
+        n = ttf->horzMetricCount();
+        pTable = ttf->table(O_hmtx, nTableSize);
+    }
+    else
+    {
+        n = ttf->vertMetricCount();
+        pTable = ttf->table(O_vmtx, nTableSize);
+    }
+
+    if (!nGlyphs || !glyphArray) return nullptr;        /* invalid parameters */
+    if (!n || !pTable) return nullptr;                  /* the font does not contain the requested metrics */
+
+    std::unique_ptr<sal_uInt16[]> res(new sal_uInt16[nGlyphs]);
+
+    const int UPEm = ttf->unitsPerEm();
+    for( int i = 0; i < nGlyphs; ++i) {
+        sal_uInt32 nAdvOffset;
+        sal_uInt16 glyphID = glyphArray[i];
+
+        if (glyphID < n) {
+            nAdvOffset = 4 * glyphID;
+        } else {
+            nAdvOffset = 4 * (n - 1);
+        }
+
+        if (nAdvOffset >= nTableSize || UPEm == 0)
+            res[i] = 0; /* better than a crash for buggy fonts */
+        else
+            res[i] = static_cast<sal_uInt16>(
+                XUnits( UPEm, GetUInt16( pTable, nAdvOffset) ) );
+    }
+
+    return res;
+}
+
+// TODO, clean up table parsing and re-use it elsewhere in this file.
+void GetTTFontMetrics(const uint8_t *pHhea, size_t nHhea,
+                      const uint8_t *pOs2, size_t nOs2,
+                      TTGlobalFontInfo *info)
+{
+    /* There are 3 different versions of OS/2 table: original (68 bytes long),
+     * Microsoft old (78 bytes long) and Microsoft new (86 bytes long,)
+     * Apple's documentation recommends looking at the table length.
+     */
+    if (nOs2 >= OS2_V0_length)
+    {
+        info->fsSelection   = GetUInt16(pOs2, OS2_fsSelection_offset);
+        info->typoAscender  = GetInt16(pOs2, OS2_typoAscender_offset);
+        info->typoDescender = GetInt16(pOs2, OS2_typoDescender_offset);
+        info->typoLineGap   = GetInt16(pOs2, OS2_typoLineGap_offset);
+        info->winAscent     = GetUInt16(pOs2, OS2_winAscent_offset);
+        info->winDescent    = GetUInt16(pOs2, OS2_winDescent_offset);
+    }
+
+    if (nHhea >= HHEA_lineGap_offset + 2) {
+        info->ascender      = GetInt16(pHhea, HHEA_ascender_offset);
+        info->descender     = GetInt16(pHhea, HHEA_descender_offset);
+        info->linegap       = GetInt16(pHhea, HHEA_lineGap_offset);
+    }
+}
+
+bool GetTTGlobalFontHeadInfo(const AbstractTrueTypeFont *ttf, int& xMin, int& yMin, int& xMax, int& yMax, sal_uInt16& macStyle)
+{
+    sal_uInt32 table_size;
+    const sal_uInt8* table = ttf->table(O_head, table_size);
+    if (table_size < 46)
+        return false;
+
+    const int UPEm = ttf->unitsPerEm();
+    if (UPEm == 0)
+        return false;
+    xMin = XUnits(UPEm, GetInt16(table, HEAD_xMin_offset));
+    yMin = XUnits(UPEm, GetInt16(table, HEAD_yMin_offset));
+    xMax = XUnits(UPEm, GetInt16(table, HEAD_xMax_offset));
+    yMax = XUnits(UPEm, GetInt16(table, HEAD_yMax_offset));
+    macStyle = GetUInt16(table, HEAD_macStyle_offset);
+    return true;
+}
+
+void GetTTGlobalFontInfo(TrueTypeFont *ttf, TTGlobalFontInfo *info)
+{
+    int UPEm = ttf->unitsPerEm();
+
+    memset(info, 0, sizeof(TTGlobalFontInfo));
+
+    info->family = ttf->family;
+    info->ufamily = ttf->ufamily;
+    info->subfamily = ttf->subfamily;
+    info->usubfamily = ttf->usubfamily;
+    info->psname = ttf->psname;
+    info->symbolEncoded = ttf->GetCharMap()->isSymbolic();
+
+    sal_uInt32 table_size;
+    const sal_uInt8* table = ttf->table(O_OS2, table_size);
+    if (table_size >= 42)
+    {
+        info->weight = GetUInt16(table, OS2_usWeightClass_offset);
+        info->width  = GetUInt16(table, OS2_usWidthClass_offset);
+
+        if (table_size >= OS2_V0_length && UPEm != 0) {
+            info->typoAscender = XUnits(UPEm,GetInt16(table, OS2_typoAscender_offset));
+            info->typoDescender = XUnits(UPEm, GetInt16(table, OS2_typoDescender_offset));
+            info->typoLineGap = XUnits(UPEm, GetInt16(table, OS2_typoLineGap_offset));
+            info->winAscent = XUnits(UPEm, GetUInt16(table, OS2_winAscent_offset));
+            info->winDescent = XUnits(UPEm, GetUInt16(table, OS2_winDescent_offset));
+            /* sanity check; some fonts treat winDescent as signed
+           * violating the standard */
+            if( info->winDescent > 5*UPEm )
+                info->winDescent = XUnits(UPEm, GetInt16(table, OS2_winDescent_offset));
+        }
+        memcpy(info->panose, table + OS2_panose_offset, OS2_panoseNbBytes_offset);
+        info->typeFlags = GetUInt16( table, OS2_fsType_offset );
+    }
+
+    table = ttf->table(O_post, table_size);
+    if (table_size >= 12 + sizeof(sal_uInt32))
+    {
+        info->pitch  = GetUInt32(table, POST_isFixedPitch_offset);
+        info->italicAngle = GetInt32(table, POST_italicAngle_offset);
+    }
+
+    GetTTGlobalFontHeadInfo(ttf, info->xMin, info->yMin, info->xMax, info->yMax, info->macStyle);
+
+    table  = ttf->table(O_hhea, table_size);
+    if (table_size >= 10 && UPEm != 0)
+    {
+        info->ascender  = XUnits(UPEm, GetInt16(table, HHEA_ascender_offset));
+        info->descender = XUnits(UPEm, GetInt16(table, HHEA_descender_offset));
+        info->linegap   = XUnits(UPEm, GetInt16(table, HHEA_lineGap_offset));
+    }
+}
+
+GlyphData *GetTTRawGlyphData(AbstractTrueTypeFont *ttf, sal_uInt32 glyphID)
+{
+    if (glyphID >= ttf->glyphCount())
+        return nullptr;
+
+    sal_uInt32 hmtxlength;
+    const sal_uInt8* hmtx = ttf->table(O_hmtx, hmtxlength);
+
+    if (!hmtxlength)
+        return nullptr;
+
+    sal_uInt32 glyflength;
+    const sal_uInt8* glyf = ttf->table(O_glyf, glyflength);
+    int n;
+
+    /* #127161# check the glyph offsets */
+    sal_uInt32 nNextOffset = ttf->glyphOffset(glyphID + 1);
+    if (nNextOffset > glyflength)
+        return nullptr;
+
+    sal_uInt32 nOffset = ttf->glyphOffset(glyphID);
+    if (nOffset > nNextOffset)
+        return nullptr;
+
+    sal_uInt32 length = nNextOffset - nOffset;
+
+    GlyphData* d = static_cast<GlyphData*>(malloc(sizeof(GlyphData))); assert(d != nullptr);
+
+    if (length > 0) {
+        const sal_uInt8* srcptr = glyf + ttf->glyphOffset(glyphID);
+        const size_t nChunkLen = ((length + 1) & ~1);
+        d->ptr = static_cast<sal_uInt8*>(malloc(nChunkLen)); assert(d->ptr != nullptr);
+        memcpy(d->ptr, srcptr, length);
+        memset(d->ptr + length, 0, nChunkLen - length);
+        d->compflag = (GetInt16( srcptr, 0 ) < 0);
+    } else {
+        d->ptr = nullptr;
+        d->compflag = false;
+    }
+
+    d->glyphID = glyphID;
+    d->nbytes = static_cast<sal_uInt16>((length + 1) & ~1);
+
+    /* now calculate npoints and ncontours */
+    ControlPoint *cp;
+    n = GetTTGlyphPoints(ttf, glyphID, &cp);
+    if (n > 0)
+    {
+        int m = 0;
+        for (int i = 0; i < n; i++)
+        {
+            if (cp[i].flags & 0x8000)
+                m++;
+        }
+        d->npoints = static_cast<sal_uInt16>(n);
+        d->ncontours = static_cast<sal_uInt16>(m);
+        free(cp);
+    } else {
+        d->npoints = 0;
+        d->ncontours = 0;
+    }
+
+    /* get advance width and left sidebearing */
+    sal_uInt32 nAwOffset;
+    sal_uInt32 nLsboffset;
+    if (glyphID < ttf->horzMetricCount()) {
+        nAwOffset = 4 * glyphID;
+        nLsboffset = 4 * glyphID + 2;
+    } else {
+        nAwOffset = 4 * (ttf->horzMetricCount() - 1);
+        nLsboffset = (ttf->horzMetricCount() * 4) + ((glyphID - ttf->horzMetricCount()) * 2);
+    }
+
+    if (nAwOffset + 2 <= hmtxlength)
+        d->aw = GetUInt16(hmtx, nAwOffset);
+    else
+    {
+        SAL_WARN("vcl.fonts", "hmtx offset " << nAwOffset << " not available");
+        d->aw = 0;
+    }
+    if (nLsboffset + 2 <= hmtxlength)
+        d->lsb = GetInt16(hmtx, nLsboffset);
+    else
+    {
+        SAL_WARN("vcl.fonts", "hmtx offset " << nLsboffset << " not available");
+        d->lsb = 0;
+    }
+
+    return d;
+}
+
+int GetTTNameRecords(AbstractTrueTypeFont const *ttf, NameRecord **nr)
+{
+    sal_uInt32 nTableSize;
+    const sal_uInt8* table = ttf->table(O_name, nTableSize);
+
+    if (nTableSize < 6)
+    {
+#if OSL_DEBUG_LEVEL > 1
+        SAL_WARN("vcl.fonts", "O_name table too small.");
+#endif
+        return 0;
+    }
+
+    sal_uInt16 n = GetUInt16(table, 2);
+    sal_uInt32 nStrBase = GetUInt16(table, 4);
+    int i;
+
+    *nr = nullptr;
+    if (n == 0) return 0;
+
+    const sal_uInt32 remaining_table_size = nTableSize-6;
+    const sal_uInt32 nMinRecordSize = 12;
+    const sal_uInt32 nMaxRecords = remaining_table_size / nMinRecordSize;
+    if (n > nMaxRecords)
+    {
+        SAL_WARN("vcl.fonts", "Parsing error in " << OUString::createFromAscii(ttf->fileName()) <<
+                 ": " << nMaxRecords << " max possible entries, but " <<
+                 n << " claimed, truncating");
+        n = nMaxRecords;
+    }
+
+    NameRecord* rec = static_cast<NameRecord*>(calloc(n, sizeof(NameRecord)));
+    assert(rec);
+
+    for (i = 0; i < n; i++) {
+        sal_uInt32 nLargestFixedOffsetPos = 6 + 10 + 12 * i;
+        sal_uInt32 nMinSize = nLargestFixedOffsetPos + sizeof(sal_uInt16);
+        if (nMinSize > nTableSize)
+        {
+            SAL_WARN( "vcl.fonts", "Font " << OUString::createFromAscii(ttf->fileName()) << " claimed to have "
+                << n << " name records, but only space for " << i);
+            n = i;
+            break;
+        }
+
+        rec[i].platformID = GetUInt16(table, 6 + 0 + 12 * i);
+        rec[i].encodingID = GetUInt16(table, 6 + 2 + 12 * i);
+        rec[i].languageID = LanguageType(GetUInt16(table, 6 + 4 + 12 * i));
+        rec[i].nameID = GetUInt16(table, 6 + 6 + 12 * i);
+        rec[i].slen = GetUInt16(table, 6 + 8 + 12 * i);
+        sal_uInt32 nStrOffset = GetUInt16(table, nLargestFixedOffsetPos);
+        if (rec[i].slen) {
+            if (nStrBase + nStrOffset + rec[i].slen >= nTableSize)
+            {
+                rec[i].sptr = nullptr;
+                rec[i].slen = 0;
+                continue;
+            }
+
+            const sal_uInt32 rec_string = nStrBase + nStrOffset;
+            const size_t available_space = rec_string > nTableSize ? 0 : (nTableSize - rec_string);
+            if (rec[i].slen <= available_space)
+            {
+                rec[i].sptr = static_cast<sal_uInt8 *>(malloc(rec[i].slen)); assert(rec[i].sptr != nullptr);
+                memcpy(rec[i].sptr, table + rec_string, rec[i].slen);
+            }
+            else
+            {
+                rec[i].sptr = nullptr;
+                rec[i].slen = 0;
+            }
+        } else {
+            rec[i].sptr = nullptr;
+        }
+        // some fonts have 3.0 names => fix them to 3.1
+        if( (rec[i].platformID == 3) && (rec[i].encodingID == 0) )
+            rec[i].encodingID = 1;
+    }
+
+    *nr = rec;
+    return n;
+}
+
+void DisposeNameRecords(NameRecord* nr, int n)
+{
+    int i;
+    for (i = 0; i < n; i++) {
+        if (nr[i].sptr) free(nr[i].sptr);
+    }
+    free(nr);
+}
+
+template<size_t N> static void
+append(std::bitset<N> & rSet, size_t const nOffset, sal_uInt32 const nValue)
+{
+    for (size_t i = 0; i < 32; ++i)
+    {
+        rSet.set(nOffset + i, (nValue & (1U << i)) != 0);
+    }
+}
+
+bool getTTCoverage(
+    std::optional<std::bitset<UnicodeCoverage::MAX_UC_ENUM>> &rUnicodeRange,
+    std::optional<std::bitset<CodePageCoverage::MAX_CP_ENUM>> &rCodePageRange,
+    const unsigned char* pTable, size_t nLength)
+{
+    bool bRet = false;
+    // parse OS/2 header
+    if (nLength >= OS2_Legacy_length)
+    {
+        rUnicodeRange = std::bitset<UnicodeCoverage::MAX_UC_ENUM>();
+        append(*rUnicodeRange,  0, GetUInt32(pTable, OS2_ulUnicodeRange1_offset));
+        append(*rUnicodeRange, 32, GetUInt32(pTable, OS2_ulUnicodeRange2_offset));
+        append(*rUnicodeRange, 64, GetUInt32(pTable, OS2_ulUnicodeRange3_offset));
+        append(*rUnicodeRange, 96, GetUInt32(pTable, OS2_ulUnicodeRange4_offset));
+        bRet = true;
+        if (nLength >= OS2_V1_length)
+        {
+            rCodePageRange = std::bitset<CodePageCoverage::MAX_CP_ENUM>();
+            append(*rCodePageRange,  0, GetUInt32(pTable, OS2_ulCodePageRange1_offset));
+            append(*rCodePageRange, 32, GetUInt32(pTable, OS2_ulCodePageRange2_offset));
+        }
+    }
+    return bRet;
+}
+
+} // namespace vcl
+
+int TestFontSubset(const void* data, sal_uInt32 size)
+{
+    int nResult = -1;
+    vcl::TrueTypeFont* pTTF = nullptr;
+    if (OpenTTFontBuffer(data, size, 0, &pTTF) == vcl::SFErrCodes::Ok)
+    {
+        vcl::TTGlobalFontInfo aInfo;
+        GetTTGlobalFontInfo(pTTF, &aInfo);
+
+        sal_uInt16 aGlyphIds[ 256 ] = {};
+        sal_uInt8 aEncoding[ 256 ] = {};
+
+        for (sal_uInt16 c = 32; c < 256; ++c)
+        {
+            aEncoding[c] = c;
+            aGlyphIds[c] = c - 31;
+        }
+
+        CreateTTFromTTGlyphs(pTTF, nullptr, aGlyphIds, aEncoding, 256);
+
+
+        // cleanup
+        CloseTTFont( pTTF );
+        // success
+        nResult = 0;
+    }
+
+    return nResult;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */