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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "distancefieldmodel.h"
#include "distancefieldmodelworker.h"
#include <QThread>
#include <QMetaEnum>
QT_BEGIN_NAMESPACE
DistanceFieldModel::DistanceFieldModel(QObject *parent)
: QAbstractListModel(parent)
, m_glyphCount(0)
{
int index = metaObject()->indexOfEnumerator("UnicodeRange");
Q_ASSERT(index >= 0);
m_rangeEnum = metaObject()->enumerator(index);
m_workerThread.reset(new QThread);
m_worker = new DistanceFieldModelWorker;
m_worker->moveToThread(m_workerThread.data());
connect(m_workerThread.data(), &QThread::finished,
m_worker, &QObject::deleteLater);
connect(m_worker, &DistanceFieldModelWorker::fontLoaded,
this, &DistanceFieldModel::startGeneration);
connect(m_worker, &DistanceFieldModelWorker::fontLoaded,
this, &DistanceFieldModel::reserveSpace);
connect(m_worker, &DistanceFieldModelWorker::distanceFieldGenerated,
this, &DistanceFieldModel::addDistanceField);
connect(m_worker, &DistanceFieldModelWorker::fontGenerated,
this, &DistanceFieldModel::stopGeneration);
connect(m_worker, &DistanceFieldModelWorker::distanceFieldGenerated,
this, &DistanceFieldModel::distanceFieldGenerated);
connect(m_worker, &DistanceFieldModelWorker::error,
this, &DistanceFieldModel::error);
m_workerThread->start();
}
DistanceFieldModel::~DistanceFieldModel()
{
m_workerThread->quit();
m_workerThread->wait();
}
QVariant DistanceFieldModel::headerData(int section, Qt::Orientation orientation, int role) const
{
Q_UNUSED(section);
Q_UNUSED(orientation);
Q_UNUSED(role);
return QVariant();
}
int DistanceFieldModel::rowCount(const QModelIndex &parent) const
{
if (parent.isValid())
return 0;
else
return m_glyphCount;
}
QVariant DistanceFieldModel::data(const QModelIndex &index, int role) const
{
static QPixmap defaultImage;
if (defaultImage.isNull()) {
defaultImage = QPixmap(64, 64);
defaultImage.fill(Qt::white);
}
if (!index.isValid())
return QVariant();
if (role == Qt::DecorationRole) {
if (index.row() < m_distanceFields.size()) {
return QPixmap::fromImage(m_distanceFields.at(index.row()).scaled(64, 64));
} else {
return defaultImage;
}
}
return QVariant();
}
void DistanceFieldModel::setFont(const QString &fileName)
{
QMetaObject::invokeMethod(m_worker,
[this, fileName] { m_worker->loadFont(fileName); },
Qt::QueuedConnection);
}
void DistanceFieldModel::reserveSpace(quint16 glyphCount,
bool doubleResolution,
qreal pixelSize)
{
beginResetModel();
m_glyphsPerUnicodeRange.clear();
m_distanceFields.clear();
m_glyphCount = glyphCount;
if (glyphCount > 0)
m_distanceFields.reserve(glyphCount);
endResetModel();
m_doubleGlyphResolution = doubleResolution;
m_pixelSize = pixelSize;
QMetaObject::invokeMethod(m_worker,
[this] { m_worker->generateOneDistanceField(); },
Qt::QueuedConnection);
}
DistanceFieldModel::UnicodeRange DistanceFieldModel::unicodeRangeForUcs4(quint32 ucs4) const
{
int index = metaObject()->indexOfEnumerator("UnicodeRange");
Q_ASSERT(index >= 0);
QMetaEnum range = metaObject()->enumerator(index);
for (int i = 0; i < range.keyCount() - 1; ++i) {
int rangeStart = range.value(i);
int rangeEnd = range.value(i + 1);
if (quint32(rangeStart) <= ucs4 && quint32(rangeEnd) >= ucs4)
return UnicodeRange(rangeStart);
}
return Other;
}
QList<DistanceFieldModel::UnicodeRange> DistanceFieldModel::unicodeRanges() const
{
return m_glyphsPerUnicodeRange.uniqueKeys();
}
QList<glyph_t> DistanceFieldModel::glyphIndexesForUnicodeRange(UnicodeRange range) const
{
return m_glyphsPerUnicodeRange.values(range);
}
QString DistanceFieldModel::nameForUnicodeRange(UnicodeRange range) const
{
return QString::fromLatin1(m_rangeEnum.valueToKey(int(range)));
}
void DistanceFieldModel::addDistanceField(const QImage &distanceField,
const QPainterPath &path,
glyph_t glyphId,
quint32 ucs4)
{
if (glyphId >= quint16(m_distanceFields.size()))
m_distanceFields.resize(glyphId + 1);
m_distanceFields[glyphId] = distanceField;
if (glyphId >= quint16(m_paths.size()))
m_paths.resize(glyphId + 1);
m_paths[glyphId] = path;
if (ucs4 != 0) {
UnicodeRange range = unicodeRangeForUcs4(ucs4);
m_glyphsPerUnicodeRange.insert(range, glyphId);
m_glyphsPerUcs4.insert(ucs4, glyphId);
}
emit dataChanged(createIndex(glyphId, 0), createIndex(glyphId, 0));
QMetaObject::invokeMethod(m_worker,
[this] { m_worker->generateOneDistanceField(); },
Qt::QueuedConnection);
}
glyph_t DistanceFieldModel::glyphIndexForUcs4(quint32 ucs4) const
{
return m_glyphsPerUcs4.value(ucs4);
}
QT_END_NAMESPACE
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