commit 484937bc519cedaca2e44297366098d3dd581c98
Author: Martin Tůma <tumic@cbox.cz>
Date:   Fri Jul 3 00:17:29 2020 +0200

    PBF(MVT) tiles to PNG tiles converter
    (QtPBFImagePlugin example/benchmark app)

diff --git a/pbf2png.cpp b/pbf2png.cpp
new file mode 100644
index 0000000..7001310
--- /dev/null
+++ b/pbf2png.cpp
@@ -0,0 +1,111 @@
+#include <QImage>
+#include <QImageReader>
+#include <QCommandLineParser>
+#include <QFileInfo>
+#include <QDir>
+#include <QTextStream>
+#include <QtConcurrent>
+#include <QGuiApplication>
+#include <QRegularExpression>
+
+
+class App : public QGuiApplication
+{
+public:
+	App(int &argc, char **argv);
+
+	int run();
+
+private:
+	static void render(QFileInfo &fi);
+
+	static bool _hidpi;
+	static QRegularExpression _re;
+	static QDir _outdir;
+};
+
+bool App::_hidpi = false;
+QRegularExpression App::_re;
+QDir App::_outdir;
+
+void App::render(QFileInfo &fi)
+{
+	QImage image;
+	QRegularExpressionMatch match = _re.match(fi.baseName());
+	QByteArray zoom(match.captured(1).toLatin1());
+
+	QImageReader reader(fi.absoluteFilePath(), zoom);
+	if (_hidpi)
+		reader.setScaledSize(QSize(1024, 1024));
+
+	if (reader.read(&image)) {
+		QString outfile(_outdir.absoluteFilePath(fi.completeBaseName() + ".png"));
+		if (!image.save(outfile, "PNG")) {
+			QTextStream err(stderr);
+			err << outfile << ": error saving image\n";
+		}
+	} else {
+		QTextStream err(stderr);
+		err << fi.absoluteFilePath() << ": " << reader.errorString() << "\n";
+	}
+}
+
+App::App(int &argc, char **argv) : QGuiApplication(argc, argv)
+{
+	setApplicationName("pbf2png");
+}
+
+int App::run()
+{
+	QCommandLineParser parser;
+	QCommandLineOption hidpi("H", "Create HIDPI images");
+	QCommandLineOption mask("M", "Tile name mask", "mask", "([0-9]+).*");
+	QCommandLineOption outdir("O", "Output directory", "dir");
+	parser.setApplicationDescription("Create PNG tiles from PBF(MVT) tiles");
+	parser.addHelpOption();
+	parser.addOption(hidpi);
+	parser.addOption(mask);
+	parser.addOption(outdir);
+	parser.addPositionalArgument("DIR", "PBF Tiles directory");
+	if (!parser.parse(arguments()))
+		return -1;
+
+	QTextStream err(stderr);
+
+	const QStringList args = parser.positionalArguments();
+	if (!args.size()) {
+		err << parser.helpText();
+		return -1;
+	}
+	QDir dir(args.at(0));
+	if (!dir.exists()) {
+		err << args.at(0) << ": No such directory\n";
+		return -1;
+	}
+	if (!parser.value(outdir).isNull()) {
+		_outdir = QDir(parser.value(outdir));
+		if (!_outdir.exists()) {
+			if (!_outdir.mkpath(".")) {
+				err << parser.value(outdir) << ": error creating directory\n";
+				return -1;
+			}
+		}
+	} else
+		_outdir = dir;
+
+	QFileInfoList list(dir.entryInfoList(QDir::NoDotAndDotDot | QDir::Files));
+
+	_re.setPattern(parser.value(mask));
+	_hidpi = parser.isSet(hidpi);
+
+	QFuture<void> future = QtConcurrent::map(list, render);
+	future.waitForFinished();
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	App a(argc, argv);
+	return a.run();
+}
diff --git a/pbf2png.pro b/pbf2png.pro
new file mode 100644
index 0000000..6ccb434
--- /dev/null
+++ b/pbf2png.pro
@@ -0,0 +1,4 @@
+QT += concurrent
+CONFIG += console
+CONFIG -= app_bundle
+SOURCES += pbf2png.cpp