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office-gobmx/vcl/source/fontsubset/sft.cxx
Rene Engelhard 90babff284 add system-libfixmath 
Change-Id: Ia0bd884d6fefde77c75889bf2ea831ebf1b401cd
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/131876
Tested-by: Jenkins
Tested-by: René Engelhard <rene@debian.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: René Engelhard <rene@debian.org>
2022-03-20 22:26:29 +01:00

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/* -*- 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 );
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: */
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