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28
29#include "distancefieldmodel.h"
30#include "distancefieldmodelworker.h"
31
32#include <QThread>
33#include <QMetaEnum>
34
35QT_BEGIN_NAMESPACE
36
37DistanceFieldModel::DistanceFieldModel(QObject *parent)
38 : QAbstractListModel(parent)
39 , m_glyphCount(0)
40{
41 int index = metaObject()->indexOfEnumerator(name: "UnicodeRange");
42 Q_ASSERT(index >= 0);
43
44 m_rangeEnum = metaObject()->enumerator(index);
45
46 m_workerThread.reset(other: new QThread);
47
48 m_worker = new DistanceFieldModelWorker;
49 m_worker->moveToThread(thread: m_workerThread.data());
50 connect(sender: m_workerThread.data(), signal: &QThread::finished,
51 receiver: m_worker, slot: &QObject::deleteLater);
52
53 connect(sender: m_worker, signal: &DistanceFieldModelWorker::fontLoaded,
54 receiver: this, slot: &DistanceFieldModel::startGeneration);
55 connect(sender: m_worker, signal: &DistanceFieldModelWorker::fontLoaded,
56 receiver: this, slot: &DistanceFieldModel::reserveSpace);
57 connect(sender: m_worker, signal: &DistanceFieldModelWorker::distanceFieldGenerated,
58 receiver: this, slot: &DistanceFieldModel::addDistanceField);
59 connect(sender: m_worker, signal: &DistanceFieldModelWorker::fontGenerated,
60 receiver: this, slot: &DistanceFieldModel::stopGeneration);
61 connect(sender: m_worker, signal: &DistanceFieldModelWorker::distanceFieldGenerated,
62 receiver: this, slot: &DistanceFieldModel::distanceFieldGenerated);
63 connect(sender: m_worker, signal: &DistanceFieldModelWorker::error,
64 receiver: this, slot: &DistanceFieldModel::error);
65
66 m_workerThread->start();
67}
68
69DistanceFieldModel::~DistanceFieldModel()
70{
71 m_workerThread->quit();
72 m_workerThread->wait();
73}
74
75QVariant DistanceFieldModel::headerData(int section, Qt::Orientation orientation, int role) const
76{
77 Q_UNUSED(section);
78 Q_UNUSED(orientation);
79 Q_UNUSED(role);
80 return QVariant();
81}
82
83int DistanceFieldModel::rowCount(const QModelIndex &parent) const
84{
85 if (parent.isValid())
86 return 0;
87 else
88 return m_glyphCount;
89}
90
91QVariant DistanceFieldModel::data(const QModelIndex &index, int role) const
92{
93 static QPixmap defaultImage;
94 if (defaultImage.isNull()) {
95 defaultImage = QPixmap(64, 64);
96 defaultImage.fill(fillColor: Qt::white);
97 }
98
99 if (!index.isValid())
100 return QVariant();
101
102 if (role == Qt::DecorationRole) {
103 if (index.row() < m_distanceFields.size()) {
104 return QPixmap::fromImage(image: m_distanceFields.at(i: index.row()).scaled(w: 64, h: 64));
105 } else {
106 return defaultImage;
107 }
108
109 }
110
111 return QVariant();
112}
113
114void DistanceFieldModel::setFont(const QString &fileName)
115{
116 QMetaObject::invokeMethod(context: m_worker,
117 function: [this, fileName] { m_worker->loadFont(fileName); },
118 type: Qt::QueuedConnection);
119}
120
121void DistanceFieldModel::reserveSpace(quint16 glyphCount,
122 bool doubleResolution,
123 qreal pixelSize)
124{
125 beginResetModel();
126 m_glyphsPerUnicodeRange.clear();
127 m_distanceFields.clear();
128 m_glyphCount = glyphCount;
129 if (glyphCount > 0)
130 m_distanceFields.reserve(asize: glyphCount);
131 endResetModel();
132
133 m_doubleGlyphResolution = doubleResolution;
134 m_pixelSize = pixelSize;
135
136 QMetaObject::invokeMethod(context: m_worker,
137 function: [this] { m_worker->generateOneDistanceField(); },
138 type: Qt::QueuedConnection);
139}
140
141DistanceFieldModel::UnicodeRange DistanceFieldModel::unicodeRangeForUcs4(quint32 ucs4) const
142{
143 int index = metaObject()->indexOfEnumerator(name: "UnicodeRange");
144 Q_ASSERT(index >= 0);
145
146 QMetaEnum range = metaObject()->enumerator(index);
147 for (int i = 0; i < range.keyCount() - 1; ++i) {
148 int rangeStart = range.value(index: i);
149 int rangeEnd = range.value(index: i + 1);
150 if (quint32(rangeStart) <= ucs4 && quint32(rangeEnd) >= ucs4)
151 return UnicodeRange(rangeStart);
152 }
153
154 return Other;
155}
156
157QList<DistanceFieldModel::UnicodeRange> DistanceFieldModel::unicodeRanges() const
158{
159 return m_glyphsPerUnicodeRange.uniqueKeys();
160}
161
162QList<glyph_t> DistanceFieldModel::glyphIndexesForUnicodeRange(UnicodeRange range) const
163{
164 return m_glyphsPerUnicodeRange.values(akey: range);
165}
166
167QString DistanceFieldModel::nameForUnicodeRange(UnicodeRange range) const
168{
169 return QString::fromLatin1(str: m_rangeEnum.valueToKey(value: int(range)));
170}
171
172void DistanceFieldModel::addDistanceField(const QImage &distanceField,
173 const QPainterPath &path,
174 glyph_t glyphId,
175 quint32 ucs4)
176{
177 if (glyphId >= quint16(m_distanceFields.size()))
178 m_distanceFields.resize(asize: glyphId + 1);
179 m_distanceFields[glyphId] = distanceField;
180 if (glyphId >= quint16(m_paths.size()))
181 m_paths.resize(asize: glyphId + 1);
182 m_paths[glyphId] = path;
183
184 if (ucs4 != 0) {
185 UnicodeRange range = unicodeRangeForUcs4(ucs4);
186 m_glyphsPerUnicodeRange.insert(akey: range, avalue: glyphId);
187 m_glyphsPerUcs4.insert(akey: ucs4, avalue: glyphId);
188 }
189
190 emit dataChanged(topLeft: createIndex(arow: glyphId, acolumn: 0), bottomRight: createIndex(arow: glyphId, acolumn: 0));
191
192 QMetaObject::invokeMethod(context: m_worker,
193 function: [this] { m_worker->generateOneDistanceField(); },
194 type: Qt::QueuedConnection);
195}
196
197glyph_t DistanceFieldModel::glyphIndexForUcs4(quint32 ucs4) const
198{
199 return m_glyphsPerUcs4.value(akey: ucs4);
200}
201
202QT_END_NAMESPACE
203

source code of qttools/src/distancefieldgenerator/distancefieldmodel.cpp