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Atlas loading optimization

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This commit is contained in:
Martin Tůma 2017-03-27 02:41:30 +02:00
parent 0c7601c831
commit c1844f9557
4 changed files with 105 additions and 31 deletions
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13
src/atlas.cpp
View File

@ -35,13 +35,12 @@ bool Atlas::isAtlas(const QFileInfoList &files)
for (int i = 0; i < files.count(); i++) {
const QString &fileName = files.at(i).fileName();
if (fileName.endsWith(".tar")) {
Tar tar;
if (!tar.load(files.at(i).absoluteFilePath())) {
if (!_tar.load(files.at(i).absoluteFilePath())) {
qWarning("%s: %s: error loading tar file", qPrintable(_name),
qPrintable(fileName));
return false;
}
QStringList tarFiles = tar.files();
QStringList tarFiles = _tar.files();
for (int j = 0; j < tarFiles.size(); j++)
if (tarFiles.at(j).endsWith(".tba"))
return true;
@ -126,7 +125,11 @@ Atlas::Atlas(const QString &path, QObject *parent) : Map(parent)
QFileInfoList maps = zdir.entryInfoList(QDir::Dirs
| QDir::NoDotAndDotDot);
for (int i = 0; i < maps.count(); i++) {
OfflineMap *map = new OfflineMap(maps.at(i).absoluteFilePath());
OfflineMap *map;
if (_tar.isOpen())
map = new OfflineMap(_tar, maps.at(i).absoluteFilePath(), this);
else
map = new OfflineMap(maps.at(i).absoluteFilePath(), this);
if (map->isValid())
_maps.append(map);
}
@ -253,6 +256,8 @@ void Atlas::draw(QPainter *painter, const QRectF &rect)
const QPointF offset = _bounds.at(i).second.topLeft();
QRectF pr = QRectF(ir.topLeft() - offset, ir.size());
map->load();
painter->translate(offset);
map->draw(painter, pr);
painter->translate(-offset);

1
src/atlas.h
View File

@ -38,6 +38,7 @@ private:
QString _name;
bool _valid;
Tar _tar;
QList<OfflineMap*> _maps;
QVector<QPair<int, int> > _zooms;
QVector<QPair<QRectF, QRectF> > _bounds;

119
src/offlinemap.cpp
View File

@ -82,8 +82,11 @@ int OfflineMap::parseMapFile(QIODevice &device, QList<ReferencePoint> &points)
bool OfflineMap::computeTransformation(const QList<ReferencePoint> &points)
{
if (points.count() < 2)
if (points.count() < 2) {
qWarning("%s: insufficient number of reference points",
qPrintable(_name));
return false;
}
Matrix c(3, 2);
c.zeroize();
@ -118,8 +121,10 @@ bool OfflineMap::computeTransformation(const QList<ReferencePoint> &points)
}
Matrix M = Q.augemented(c);
if (!M.eliminate())
if (!M.eliminate()) {
qWarning("%s: singular transformation matrix", qPrintable(_name));
return false;
}
_transform = QTransform(M.m(0,3), M.m(1,3), M.m(0,4), M.m(1,4),
M.m(2,3), M.m(2,4));
@ -129,8 +134,7 @@ bool OfflineMap::computeTransformation(const QList<ReferencePoint> &points)
bool OfflineMap::computeResolution(QList<ReferencePoint> &points)
{
if (points.count() < 2)
return false;
Q_ASSERT(points.count() >= 2);
int maxLon = 0, minLon = 0, maxLat = 0, minLat = 0;
qreal dLon, pLon, dLat, pLat;
@ -173,7 +177,8 @@ bool OfflineMap::getImageInfo(const QString &path)
return true;
}
bool OfflineMap::getTileInfo(const QStringList &tiles, const QString &path)
bool OfflineMap::getTileInfo(const QStringList &tiles,
const QString &path)
{
if (!_size.isValid()) {
qWarning("%s: missing total image size (IWH)", qPrintable(_name));
@ -190,7 +195,7 @@ bool OfflineMap::getTileInfo(const QStringList &tiles, const QString &path)
if (tiles.at(i).contains(rx)) {
_tileName = QString(tiles.at(i)).replace(rx, "_%1_%2.");
if (_tar.isOpen()) {
if (path.isNull()) {
QByteArray ba = _tar.file(tiles.at(i));
QBuffer buffer(&ba);
_tileSize = QImageReader(&buffer).size();
@ -214,12 +219,27 @@ bool OfflineMap::getTileInfo(const QStringList &tiles, const QString &path)
return false;
}
bool OfflineMap::mapLoaded(int res)
{
if (res) {
if (res == -2)
qWarning("%s: no map file found", qPrintable(_name));
else if (res == -1)
qWarning("%s: error opening map file", qPrintable(_name));
else
qWarning("%s: map file parse error on line: %d", qPrintable(_name),
res);
return false;
}
return true;
}
OfflineMap::OfflineMap(const QString &path, QObject *parent) : Map(parent)
{
int errorLine = -2;
QList<ReferencePoint> points;
_valid = false;
QFileInfo fi(path);
@ -241,6 +261,7 @@ OfflineMap::OfflineMap(const QString &path, QObject *parent) : Map(parent)
QByteArray ba = _tar.file(tarFiles.at(j));
QBuffer buffer(&ba);
errorLine = parseMapFile(buffer, points);
_imgPath = QString();
break;
}
}
@ -251,21 +272,11 @@ OfflineMap::OfflineMap(const QString &path, QObject *parent) : Map(parent)
break;
}
}
if (errorLine) {
if (errorLine == -2)
qWarning("%s: no map file found", qPrintable(_name));
else if (errorLine == -1)
qWarning("%s: error opening map file", qPrintable(_name));
else
qWarning("%s: map file parse error on line: %d", qPrintable(_name),
errorLine);
if (!mapLoaded(errorLine))
return;
}
if (!computeTransformation(points)) {
qWarning("%s: error computing map transformation", qPrintable(_name));
if (!computeTransformation(points))
return;
}
computeResolution(points);
if (_tar.isOpen()) {
@ -274,8 +285,9 @@ OfflineMap::OfflineMap(const QString &path, QObject *parent) : Map(parent)
} else {
QDir set(fi.absoluteFilePath() + "/" + "set");
if (set.exists()) {
if (!getTileInfo(set.entryList(), set.absolutePath()))
if (!getTileInfo(set.entryList(), set.canonicalPath()))
return;
_imgPath = QString();
} else {
if (!getImageInfo(fi.absoluteFilePath()))
return;
@ -286,20 +298,73 @@ OfflineMap::OfflineMap(const QString &path, QObject *parent) : Map(parent)
_valid = true;
}
void OfflineMap::load()
OfflineMap::OfflineMap(Tar &tar, const QString &path, QObject *parent)
: Map(parent)
{
if (_tileSize.isValid())
int errorLine = -2;
QList<ReferencePoint> points;
_valid = false;
QFileInfo fi(path);
_name = fi.fileName();
QFileInfo li(fi.absoluteDir().dirName());
QString prefix = li.fileName() + "/" + fi.fileName() + "/";
QStringList tarFiles = tar.files();
for (int j = 0; j < tarFiles.size(); j++) {
if (tarFiles.at(j).startsWith(prefix)) {
QByteArray ba = tar.file(tarFiles.at(j));
QBuffer buffer(&ba);
errorLine = parseMapFile(buffer, points);
break;
}
}
if (!mapLoaded(errorLine))
return;
_img = new QImage(_imgPath);
if (_img->isNull())
qWarning("%s: error loading map image", qPrintable(_imgPath));
if (!computeTransformation(points))
return;
computeResolution(points);
QDir dir(path);
QFileInfoList mapFiles = dir.entryInfoList(QDir::Files);
for (int i = 0; i < mapFiles.count(); i++) {
const QString &fileName = mapFiles.at(i).absoluteFilePath();
if (fileName.endsWith(".tar"))
_tarPath = fileName;
}
_imgPath = QString();
_img = 0;
_valid = true;
}
void OfflineMap::load()
{
if (!_tarPath.isNull() && !_tileSize.isValid()) {
if (!_tar.load(_tarPath)) {
qWarning("%s: %s: error loading tar file", qPrintable(_name),
qPrintable(_tarPath));
return;
}
getTileInfo(_tar.files());
return;
}
if (!_img && !_imgPath.isNull()) {
_img = new QImage(_imgPath);
if (_img->isNull())
qWarning("%s: error loading map image", qPrintable(_imgPath));
}
}
void OfflineMap::unload()
{
if (_img)
if (_img) {
delete _img;
_img = 0;
}
}
QRectF OfflineMap::bounds() const
@ -369,7 +434,7 @@ void OfflineMap::draw(QPainter *painter, const QRectF &rect)
}
}
} else {
if (_img->isNull())
if (!_img || _img->isNull())
painter->fillRect(rect, Qt::white);
else {
QPoint p = rect.topLeft().toPoint();

3
src/offlinemap.h
View File

@ -15,6 +15,7 @@ class OfflineMap : public Map
public:
OfflineMap(const QString &path, QObject *parent = 0);
OfflineMap(Tar &tar, const QString &path, QObject *parent = 0);
const QString &name() const {return _name;}
@ -40,6 +41,7 @@ private:
typedef QPair<QPoint, Coordinates> ReferencePoint;
int parseMapFile(QIODevice &device, QList<ReferencePoint> &points);
bool mapLoaded(int res);
bool computeTransformation(const QList<ReferencePoint> &points);
bool computeResolution(QList<ReferencePoint> &points);
bool getTileInfo(const QStringList &tiles, const QString &path = QString());
@ -51,6 +53,7 @@ private:
qreal _resolution;
Tar _tar;
QString _tarPath;
QImage *_img;
QString _imgPath;
QSize _tileSize;