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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 .
*/
#include <sal/config.h>
#include <i18nlangtag/mslangid.hxx>
#include <officecfg/Office/Common.hxx>
#include <sal/log.hxx>
#include <tools/stream.hxx>
#include <unotools/configmgr.hxx>
#include <vcl/metric.hxx>
#include <vcl/outdev.hxx>
#include <font/FontSelectPattern.hxx>
#include <font/PhysicalFontFace.hxx>
#include <font/LogicalFontInstance.hxx>
#include <impfontmetricdata.hxx>
#include <sft.hxx>
#include <com/sun/star/uno/Sequence.hxx>
#include <comphelper/sequence.hxx>
#include <hb-ot.h>
using namespace ::com::sun::star;
using namespace ::com::sun::star::uno;
using namespace ::rtl;
using namespace ::utl;
FontMetric::FontMetric()
: mnAscent( 0 ),
mnDescent( 0 ),
mnIntLeading( 0 ),
mnExtLeading( 0 ),
mnLineHeight( 0 ),
mnSlant( 0 ),
mnBulletOffset( 0 ),
mnHangingBaseline( 0 ),
mbFullstopCentered( false )
{}
FontMetric::FontMetric( const FontMetric& rFontMetric ) = default;
FontMetric::FontMetric(vcl::font::PhysicalFontFace const& rFace)
: FontMetric()
{
SetFamilyName(rFace.GetFamilyName());
SetStyleName(rFace.GetStyleName());
SetCharSet(rFace.IsMicrosoftSymbolEncoded() ? RTL_TEXTENCODING_SYMBOL : RTL_TEXTENCODING_UNICODE);
SetFamily(rFace.GetFamilyType());
SetPitch(rFace.GetPitch());
SetWeight(rFace.GetWeight());
SetItalic(rFace.GetItalic());
SetAlignment(TextAlign::ALIGN_TOP);
SetWidthType(rFace.GetWidthType());
SetQuality(rFace.GetQuality() );
}
FontMetric::~FontMetric()
{
}
FontMetric& FontMetric::operator=(const FontMetric& rFontMetric) = default;
FontMetric& FontMetric::operator=(FontMetric&& rFontMetric) = default;
bool FontMetric::EqualNoBase( const FontMetric& r ) const
{
if (mbFullstopCentered != r.mbFullstopCentered)
return false;
if( mnAscent != r.mnAscent )
return false;
if( mnDescent != r.mnDescent )
return false;
if( mnIntLeading != r.mnIntLeading )
return false;
if( mnExtLeading != r.mnExtLeading )
return false;
if( mnSlant != r.mnSlant )
return false;
return true;
}
bool FontMetric::operator==( const FontMetric& r ) const
{
if( Font::operator!=(r) )
return false;
return EqualNoBase(r);
}
bool FontMetric::EqualIgnoreColor( const FontMetric& r ) const
{
if( !Font::EqualIgnoreColor(r) )
return false;
return EqualNoBase(r);
}
size_t FontMetric::GetHashValueNoBase() const
{
size_t hash = 0;
o3tl::hash_combine( hash, mbFullstopCentered );
o3tl::hash_combine( hash, mnAscent );
o3tl::hash_combine( hash, mnDescent );
o3tl::hash_combine( hash, mnIntLeading );
o3tl::hash_combine( hash, mnExtLeading );
o3tl::hash_combine( hash, mnSlant );
return hash;
}
size_t FontMetric::GetHashValueIgnoreColor() const
{
size_t hash = GetHashValueNoBase();
o3tl::hash_combine( hash, Font::GetHashValueIgnoreColor());
return hash;
}
ImplFontMetricData::ImplFontMetricData( const vcl::font::FontSelectPattern& rFontSelData )
: FontAttributes( rFontSelData )
, mnHeight ( rFontSelData.mnHeight )
, mnWidth ( rFontSelData.mnWidth )
, mnOrientation( static_cast<short>(rFontSelData.mnOrientation) )
, mnAscent( 0 )
, mnDescent( 0 )
, mnIntLeading( 0 )
, mnExtLeading( 0 )
, mnSlant( 0 )
, mnMinKashida( 0 )
, mnHangingBaseline( 0 )
, mbFullstopCentered( false )
, mnBulletOffset( 0 )
, mnUnderlineSize( 0 )
, mnUnderlineOffset( 0 )
, mnBUnderlineSize( 0 )
, mnBUnderlineOffset( 0 )
, mnDUnderlineSize( 0 )
, mnDUnderlineOffset1( 0 )
, mnDUnderlineOffset2( 0 )
, mnWUnderlineSize( 0 )
, mnWUnderlineOffset( 0 )
, mnAboveUnderlineSize( 0 )
, mnAboveUnderlineOffset( 0 )
, mnAboveBUnderlineSize( 0 )
, mnAboveBUnderlineOffset( 0 )
, mnAboveDUnderlineSize( 0 )
, mnAboveDUnderlineOffset1( 0 )
, mnAboveDUnderlineOffset2( 0 )
, mnAboveWUnderlineSize( 0 )
, mnAboveWUnderlineOffset( 0 )
, mnStrikeoutSize( 0 )
, mnStrikeoutOffset( 0 )
, mnBStrikeoutSize( 0 )
, mnBStrikeoutOffset( 0 )
, mnDStrikeoutSize( 0 )
, mnDStrikeoutOffset1( 0 )
, mnDStrikeoutOffset2( 0 )
{
// initialize the used font name
sal_Int32 nTokenPos = 0;
SetFamilyName( OUString(GetNextFontToken( rFontSelData.GetFamilyName(), nTokenPos )) );
SetStyleName( rFontSelData.GetStyleName() );
}
bool ImplFontMetricData::ShouldNotUseUnderlineMetrics() const
{
if (utl::ConfigManager::IsFuzzing())
return false;
css::uno::Sequence<OUString> rNoUnderlineMetricsList(
officecfg::Office::Common::Misc::FontsDontUseUnderlineMetrics::get());
if (comphelper::findValue(rNoUnderlineMetricsList, GetFamilyName()) != -1)
{
SAL_INFO("vcl.gdi.fontmetric", "Not using underline metrics for: " << GetFamilyName());
return true;
}
return false;
}
bool ImplFontMetricData::ImplInitTextLineSizeHarfBuzz(LogicalFontInstance* pFont)
{
if (ShouldNotUseUnderlineMetrics())
return false;
auto* pHbFont = pFont->GetHbFont();
hb_position_t nUnderlineSize;
if (!hb_ot_metrics_get_position(pHbFont, HB_OT_METRICS_TAG_UNDERLINE_SIZE, &nUnderlineSize))
return false;
hb_position_t nUnderlineOffset;
if (!hb_ot_metrics_get_position(pHbFont, HB_OT_METRICS_TAG_UNDERLINE_OFFSET, &nUnderlineOffset))
return false;
hb_position_t nStrikeoutSize;
if (!hb_ot_metrics_get_position(pHbFont, HB_OT_METRICS_TAG_STRIKEOUT_SIZE, &nStrikeoutSize))
return false;
hb_position_t nStrikeoutOffset;
if (!hb_ot_metrics_get_position(pHbFont, HB_OT_METRICS_TAG_STRIKEOUT_OFFSET, &nStrikeoutOffset))
return false;
double fScale = 0;
pFont->GetScale(nullptr, &fScale);
double nOffset = -nUnderlineOffset * fScale;
double nSize = nUnderlineSize * fScale;
double nSize2 = nSize / 2.;
double nBSize = nSize * 2.;
double n2Size = nBSize / 3.;
mnUnderlineSize = std::ceil(nSize);
mnUnderlineOffset = std::ceil(nOffset);
mnBUnderlineSize = std::ceil(nBSize);
mnBUnderlineOffset = std::ceil(nOffset - nSize2);
mnDUnderlineSize = std::ceil(n2Size);
mnDUnderlineOffset1 = mnBUnderlineOffset;
mnDUnderlineOffset2 = mnBUnderlineOffset + mnDUnderlineSize * 2;
mnWUnderlineSize = mnBUnderlineSize;
mnWUnderlineOffset = std::ceil(nOffset + nSize);
nOffset = -nStrikeoutOffset * fScale;
nSize = nStrikeoutSize * fScale;
nSize2 = nSize / 2.;
nBSize = nSize * 2.;
n2Size = nBSize / 3.;
mnStrikeoutSize = std::ceil(nSize);
mnStrikeoutOffset = std::ceil(nOffset);
mnBStrikeoutSize = std::ceil(nBSize);
mnBStrikeoutOffset = std::round(nOffset - nSize2);
mnDStrikeoutSize = std::ceil(n2Size);
mnDStrikeoutOffset1 = mnBStrikeoutOffset;
mnDStrikeoutOffset2 = mnBStrikeoutOffset + mnDStrikeoutSize * 2;
return true;
}
void ImplFontMetricData::ImplInitTextLineSize( const OutputDevice* pDev )
{
mnBulletOffset = ( pDev->GetTextWidth( OUString( u' ' ) ) - pDev->GetTextWidth( OUString( u'\x00b7' ) ) ) >> 1 ;
if (ImplInitTextLineSizeHarfBuzz(const_cast<LogicalFontInstance*>(pDev->GetFontInstance())))
return;
tools::Long nDescent = mnDescent;
if ( nDescent <= 0 )
{
nDescent = mnAscent / 10;
if ( !nDescent )
nDescent = 1;
}
// #i55341# for some fonts it is not a good idea to calculate
// their text line metrics from the real font descent
// => work around this problem just for these fonts
if( 3*nDescent > mnAscent )
nDescent = mnAscent / 3;
tools::Long nLineHeight = ((nDescent*25)+50) / 100;
if ( !nLineHeight )
nLineHeight = 1;
tools::Long nLineHeight2 = nLineHeight / 2;
if ( !nLineHeight2 )
nLineHeight2 = 1;
tools::Long nBLineHeight = ((nDescent*50)+50) / 100;
if ( nBLineHeight == nLineHeight )
nBLineHeight++;
tools::Long nBLineHeight2 = nBLineHeight/2;
if ( !nBLineHeight2 )
nBLineHeight2 = 1;
tools::Long n2LineHeight = ((nDescent*16)+50) / 100;
if ( !n2LineHeight )
n2LineHeight = 1;
tools::Long n2LineDY = n2LineHeight;
/* #117909#
* add some pixels to minimum double line distance on higher resolution devices
*/
tools::Long nMin2LineDY = 1 + pDev->GetDPIY()/150;
if ( n2LineDY < nMin2LineDY )
n2LineDY = nMin2LineDY;
tools::Long n2LineDY2 = n2LineDY/2;
if ( !n2LineDY2 )
n2LineDY2 = 1;
const vcl::Font& rFont ( pDev->GetFont() );
bool bCJKVertical = MsLangId::isCJK(rFont.GetLanguage()) && rFont.IsVertical();
tools::Long nUnderlineOffset = bCJKVertical ? mnDescent : (mnDescent/2 + 1);
tools::Long nStrikeoutOffset = rFont.IsVertical() ? -((mnAscent - mnDescent) / 2) : -((mnAscent - mnIntLeading) / 3);
mnUnderlineSize = nLineHeight;
mnUnderlineOffset = nUnderlineOffset - nLineHeight2;
mnBUnderlineSize = nBLineHeight;
mnBUnderlineOffset = nUnderlineOffset - nBLineHeight2;
mnDUnderlineSize = n2LineHeight;
mnDUnderlineOffset1 = nUnderlineOffset - n2LineDY2 - n2LineHeight;
mnDUnderlineOffset2 = mnDUnderlineOffset1 + n2LineDY + n2LineHeight;
tools::Long nWCalcSize = mnDescent;
if ( nWCalcSize < 6 )
{
if ( (nWCalcSize == 1) || (nWCalcSize == 2) )
mnWUnderlineSize = nWCalcSize;
else
mnWUnderlineSize = 3;
}
else
mnWUnderlineSize = ((nWCalcSize*50)+50) / 100;
// Don't assume that wavelines are never placed below the descent, because for most fonts the waveline
// is drawn into the text
mnWUnderlineOffset = nUnderlineOffset;
mnStrikeoutSize = nLineHeight;
mnStrikeoutOffset = nStrikeoutOffset - nLineHeight2;
mnBStrikeoutSize = nBLineHeight;
mnBStrikeoutOffset = nStrikeoutOffset - nBLineHeight2;
mnDStrikeoutSize = n2LineHeight;
mnDStrikeoutOffset1 = nStrikeoutOffset - n2LineDY2 - n2LineHeight;
mnDStrikeoutOffset2 = mnDStrikeoutOffset1 + n2LineDY + n2LineHeight;
}
void ImplFontMetricData::ImplInitAboveTextLineSize( const OutputDevice* pDev )
{
ImplInitTextLineSize(pDev);
tools::Long nIntLeading = mnIntLeading;
// TODO: assess usage of nLeading below (changed in extleading CWS)
// if no leading is available, we assume 15% of the ascent
if ( nIntLeading <= 0 )
{
nIntLeading = mnAscent*15/100;
if ( !nIntLeading )
nIntLeading = 1;
}
tools::Long nCeiling = -mnAscent;
mnAboveUnderlineSize = mnUnderlineSize;
mnAboveUnderlineOffset = nCeiling + (nIntLeading - mnUnderlineSize + 1) / 2;
mnAboveBUnderlineSize = mnBUnderlineSize;
mnAboveBUnderlineOffset = nCeiling + (nIntLeading - mnBUnderlineSize + 1) / 2;
mnAboveDUnderlineSize = mnDUnderlineSize;
mnAboveDUnderlineOffset1 = nCeiling + (nIntLeading - 3*mnDUnderlineSize + 1) / 2;
mnAboveDUnderlineOffset2 = nCeiling + (nIntLeading + mnDUnderlineSize + 1) / 2;
mnAboveWUnderlineSize = mnWUnderlineSize;
mnAboveWUnderlineOffset = nCeiling + (nIntLeading + 1) / 2;
}
void ImplFontMetricData::ImplInitFlags( const OutputDevice* pDev )
{
const vcl::Font& rFont ( pDev->GetFont() );
bool bCentered = true;
if (MsLangId::isCJK(rFont.GetLanguage()))
{
tools::Rectangle aRect;
pDev->GetTextBoundRect( aRect, u"\x3001" ); // Fullwidth fullstop
const auto nH = rFont.GetFontSize().Height();
const auto nB = aRect.Left();
// Use 18.75% as a threshold to define a centered fullwidth fullstop.
// In general, nB/nH < 5% for most Japanese fonts.
bCentered = nB > (((nH >> 1)+nH)>>3);
}
SetFullstopCenteredFlag( bCentered );
}
bool ImplFontMetricData::ShouldUseWinMetrics(int nAscent, int nDescent, int nTypoAscent,
int nTypoDescent, int nWinAscent,
int nWinDescent) const
{
if (utl::ConfigManager::IsFuzzing())
return false;
OUString aFontIdentifier(
GetFamilyName() + ","
+ OUString::number(nAscent) + "," + OUString::number(nDescent) + ","
+ OUString::number(nTypoAscent) + "," + OUString::number(nTypoDescent) + ","
+ OUString::number(nWinAscent) + "," + OUString::number(nWinDescent));
css::uno::Sequence<OUString> rWinMetricFontList(
officecfg::Office::Common::Misc::FontsUseWinMetrics::get());
if (comphelper::findValue(rWinMetricFontList, aFontIdentifier) != -1)
{
SAL_INFO("vcl.gdi.fontmetric", "Using win metrics for: " << aFontIdentifier);
return true;
}
return false;
}
// These are “private” HarfBuzz metrics tags, they are supported by not exposed
// in the public header. They are safe to use, HarfBuzz just does not want to
// advertise them.
constexpr auto ASCENT_OS2 = static_cast<hb_ot_metrics_tag_t>(HB_TAG('O', 'a', 's', 'c'));
constexpr auto DESCENT_OS2 = static_cast<hb_ot_metrics_tag_t>(HB_TAG('O', 'd', 's', 'c'));
constexpr auto LINEGAP_OS2 = static_cast<hb_ot_metrics_tag_t>(HB_TAG('O', 'l', 'g', 'p'));
constexpr auto ASCENT_HHEA = static_cast<hb_ot_metrics_tag_t>(HB_TAG('H', 'a', 's', 'c'));
constexpr auto DESCENT_HHEA = static_cast<hb_ot_metrics_tag_t>(HB_TAG('H', 'd', 's', 'c'));
constexpr auto LINEGAP_HHEA = static_cast<hb_ot_metrics_tag_t>(HB_TAG('H', 'l', 'g', 'p'));
void ImplFontMetricData::ImplCalcLineSpacing(LogicalFontInstance* pFontInstance)
{
mnAscent = mnDescent = mnExtLeading = mnIntLeading = 0;
auto* pFace = pFontInstance->GetFontFace();
auto* pHbFont = pFontInstance->GetHbFont();
double fScale = 0;
pFontInstance->GetScale(nullptr, &fScale);
double fAscent = 0, fDescent = 0, fExtLeading = 0;
auto aFvar(pFace->GetRawFontData(HB_TAG('f', 'v', 'a', 'r')));
if (!aFvar.empty())
{
// This is a variable font, trust HarfBuzz to give us the right metrics
// and apply variations to them.
hb_position_t nAscent, nDescent, nLineGap;
if (hb_ot_metrics_get_position(pHbFont, HB_OT_METRICS_TAG_HORIZONTAL_ASCENDER, &nAscent)
&& hb_ot_metrics_get_position(pHbFont, HB_OT_METRICS_TAG_HORIZONTAL_DESCENDER,
&nDescent)
&& hb_ot_metrics_get_position(pHbFont, HB_OT_METRICS_TAG_HORIZONTAL_LINE_GAP,
&nLineGap))
{
fAscent = nAscent * fScale;
fDescent = -nDescent * fScale;
fExtLeading = nLineGap * fScale;
}
}
else
{
// This is not a variable font, we try to choose the best metrics
// ourselves for backward comparability:
//
// - hhea metrics should be used, since hhea is a mandatory font table
// and should always be present.
// - But if OS/2 is present, it should be used since it is mandatory in
// Windows.
// OS/2 has Typo and Win metrics, but the later was meant to control
// text clipping not line spacing and can be ridiculously large.
// Unfortunately many Windows application incorrectly use the Win
// metrics (thanks to GDI’s TEXTMETRIC) and old fonts might be
// designed with this in mind, so OpenType introduced a flag for
// fonts to indicate that they really want to use Typo metrics. So
// for best backward compatibility:
// - Use Win metrics if available.
// - Unless USE_TYPO_METRICS flag is set, in which case use Typo
// metrics.
// Try hhea table first.
hb_position_t nAscent = 0, nDescent = 0, nLineGap = 0;
if (hb_ot_metrics_get_position(pHbFont, ASCENT_HHEA, &nAscent)
&& hb_ot_metrics_get_position(pHbFont, DESCENT_HHEA, &nDescent)
&& hb_ot_metrics_get_position(pHbFont, LINEGAP_HHEA, &nLineGap))
{
// tdf#107605: Some fonts have weird values here, so check that
// ascender is +ve and descender is -ve as they normally should.
if (nAscent >= 0 && nDescent <= 0)
{
fAscent = nAscent * fScale;
fDescent = -nDescent * fScale;
fExtLeading = nLineGap * fScale;
}
}
// But if OS/2 is present, prefer it.
hb_position_t nTypoAscent, nTypoDescent, nTypoLineGap, nWinAscent, nWinDescent;
if (hb_ot_metrics_get_position(pHbFont, ASCENT_OS2, &nTypoAscent)
&& hb_ot_metrics_get_position(pHbFont, DESCENT_OS2, &nTypoDescent)
&& hb_ot_metrics_get_position(pHbFont, LINEGAP_OS2, &nTypoLineGap)
&& hb_ot_metrics_get_position(pHbFont, HB_OT_METRICS_TAG_HORIZONTAL_CLIPPING_ASCENT,
&nWinAscent)
&& hb_ot_metrics_get_position(pHbFont, HB_OT_METRICS_TAG_HORIZONTAL_CLIPPING_DESCENT,
&nWinDescent))
{
if ((fAscent == 0.0 && fDescent == 0.0)
|| ShouldUseWinMetrics(nAscent, nDescent, nTypoAscent, nTypoDescent, nWinAscent,
nWinDescent))
{
fAscent = nWinAscent * fScale;
fDescent = nWinDescent * fScale;
fExtLeading = 0;
}
bool bUseTypoMetrics = false;
{
// TODO: Use HarfBuzz API instead of raw access
// https://github.com/harfbuzz/harfbuzz/issues/1920
sal_uInt16 fsSelection = 0;
auto aOS2(pFace->GetRawFontData(HB_TAG('O', 'S', '/', '2')));
SvMemoryStream aStream(const_cast<uint8_t*>(aOS2.data()), aOS2.size(),
StreamMode::READ);
// Font data are big endian.
aStream.SetEndian(SvStreamEndian::BIG);
if (aStream.Seek(vcl::OS2_fsSelection_offset) == vcl::OS2_fsSelection_offset)
aStream.ReadUInt16(fsSelection);
bUseTypoMetrics = fsSelection & (1 << 7);
}
if (bUseTypoMetrics && nTypoAscent >= 0 && nTypoDescent <= 0)
{
fAscent = nTypoAscent * fScale;
fDescent = -nTypoDescent * fScale;
fExtLeading = nTypoLineGap * fScale;
}
}
}
mnAscent = round(fAscent);
mnDescent = round(fDescent);
mnExtLeading = round(fExtLeading);
if (mnAscent || mnDescent)
mnIntLeading = mnAscent + mnDescent - mnHeight;
}
void ImplFontMetricData::ImplInitBaselines(LogicalFontInstance *pFontInstance)
{
hb_font_t* pHbFont = pFontInstance->GetHbFont();
double fScale = 0;
pFontInstance->GetScale(nullptr, &fScale);
hb_position_t nBaseline = 0;
if (hb_ot_layout_get_baseline(pHbFont,
HB_OT_LAYOUT_BASELINE_TAG_HANGING,
HB_DIRECTION_INVALID,
HB_SCRIPT_UNKNOWN,
HB_TAG_NONE,
&nBaseline))
{
mnHangingBaseline = nBaseline * fScale;
}
else
{
mnHangingBaseline = 0;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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