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Parallelized tile loader

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This commit is contained in:
Martin Tůma 2018-11-10 13:18:54 +01:00
parent b6e9400392
commit 9842214bb6
1 changed files with 73 additions and 23 deletions
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96
src/map/tileloader.cpp
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@ -1,17 +1,43 @@
#include <QDir>
#include <QFileInfo>
#include <QEventLoop>
#include <QPixmapCache>
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
#include <QtCore>
#else // QT_VERSION < 5
#include <QtConcurrent>
#endif // QT_VERSION < 5
#include "tileloader.h"
static bool loadTileFile(Tile &tile, const QString &file)
class TileImage
{
if (!tile.pixmap().load(file, tile.zoom().toString().toLatin1())) {
qWarning("%s: error loading tile file", qPrintable(file));
return false;
public:
TileImage(const QString &file, Tile &tile)
: _file(file), _tile(tile) {}
void createPixmap()
{
_tile.pixmap().convertFromImage(_image);
}
void load()
{
QByteArray z(_tile.zoom().toString().toLatin1());
_image.load(_file, z);
}
return true;
const QString &file() const {return _file;}
Tile &tile() {return _tile;}
private:
QString _file;
Tile &_tile;
QImage _image;
};
static void render(TileImage &ti)
{
ti.load();
}
TileLoader::TileLoader(const QString &dir, QObject *parent)
@ -27,18 +53,23 @@ TileLoader::TileLoader(const QString &dir, QObject *parent)
void TileLoader::loadTilesAsync(QVector<Tile> &list)
{
QList<Download> dl;
QList<TileImage> imgs;
for (int i = 0; i < list.size(); i++) {
Tile &t = list[i];
QString file(tileFile(t));
if (QPixmapCache::find(file, t.pixmap()))
continue;
QFileInfo fi(file);
if (fi.exists())
loadTileFile(t, file);
imgs.append(TileImage(file, t));
else {
QUrl url(tileUrl(t));
if (url.isLocalFile())
loadTileFile(t, url.toLocalFile());
imgs.append(TileImage(url.toLocalFile(), t));
else
dl.append(Download(url, file));
}
@ -46,45 +77,64 @@ void TileLoader::loadTilesAsync(QVector<Tile> &list)
if (!dl.empty())
_downloader->get(dl, _authorization);
QFuture<void> future = QtConcurrent::map(imgs, render);
future.waitForFinished();
for (int i = 0; i < imgs.size(); i++) {
TileImage &ti = imgs[i];
ti.createPixmap();
QPixmapCache::insert(ti.file(), ti.tile().pixmap());
}
}
void TileLoader::loadTilesSync(QVector<Tile> &list)
{
QList<Download> dl;
QList<Tile *> tl;
QList<TileImage> imgs;
for (int i = 0; i < list.size(); i++) {
Tile &t = list[i];
QString file(tileFile(t));
if (QPixmapCache::find(file, t.pixmap()))
continue;
QFileInfo fi(file);
if (fi.exists())
loadTileFile(t, file);
imgs.append(TileImage(file, t));
else {
QUrl url(tileUrl(t));
if (url.isLocalFile())
loadTileFile(t, url.toLocalFile());
else
imgs.append(TileImage(url.toLocalFile(), t));
else {
dl.append(Download(url, file));
tl.append(&t);
}
}
}
if (dl.empty())
return;
if (!dl.empty()) {
QEventLoop wait;
QObject::connect(_downloader, SIGNAL(finished()), &wait, SLOT(quit()));
if (_downloader->get(dl, _authorization))
wait.exec();
QEventLoop wait;
QObject::connect(_downloader, SIGNAL(finished()), &wait, SLOT(quit()));
if (_downloader->get(dl, _authorization))
wait.exec();
for (int i = 0; i < list.size(); i++) {
Tile &t = list[i];
if (t.pixmap().isNull()) {
QString file = tileFile(t);
for (int i = 0; i < tl.size(); i++) {
Tile *t = tl[i];
QString file = tileFile(*t);
if (QFileInfo(file).exists())
loadTileFile(t, file);
imgs.append(TileImage(file, *t));
}
}
QFuture<void> future = QtConcurrent::map(imgs, render);
future.waitForFinished();
for (int i = 0; i < imgs.size(); i++)
imgs[i].createPixmap();
}
void TileLoader::clearCache()