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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qfontenginemultifontconfig_p.h"
#include <QtGui/private/qfontengine_ft_p.h>
QT_BEGIN_NAMESPACE
QFontEngineMultiFontConfig::QFontEngineMultiFontConfig(QFontEngine *fe, int script)
: QFontEngineMulti(fe, script)
{
}
QFontEngineMultiFontConfig::~QFontEngineMultiFontConfig()
{
for (FcPattern *pattern : qAsConst(cachedMatchPatterns)) {
if (pattern)
FcPatternDestroy(pattern);
}
}
bool QFontEngineMultiFontConfig::shouldLoadFontEngineForCharacter(int at, uint ucs4) const
{
bool charSetHasChar = true;
FcPattern *matchPattern = getMatchPatternForFallback(at - 1);
if (matchPattern != nullptr) {
FcCharSet *charSet;
FcPatternGetCharSet(matchPattern, FC_CHARSET, 0, &charSet);
charSetHasChar = FcCharSetHasChar(charSet, ucs4);
}
return charSetHasChar;
}
FcPattern * QFontEngineMultiFontConfig::getMatchPatternForFallback(int fallBackIndex) const
{
Q_ASSERT(fallBackIndex < fallbackFamilyCount());
if (fallbackFamilyCount() > cachedMatchPatterns.size())
cachedMatchPatterns.resize(fallbackFamilyCount());
FcPattern *ret = cachedMatchPatterns.at(fallBackIndex);
if (ret)
return ret;
FcPattern *requestPattern = FcPatternCreate();
FcValue value;
value.type = FcTypeString;
QByteArray cs = fallbackFamilyAt(fallBackIndex).toUtf8();
value.u.s = reinterpret_cast<const FcChar8 *>(cs.data());
FcPatternAdd(requestPattern, FC_FAMILY, value, true);
FcResult result;
ret = FcFontMatch(nullptr, requestPattern, &result);
cachedMatchPatterns.insert(fallBackIndex, ret);
FcPatternDestroy(requestPattern);
return ret;
}
QT_END_NAMESPACE
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