From 9dd4e117f6db6aac2b1d971bf4dc8852b25d498c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Sat, 29 Feb 2020 13:47:27 +0100
Subject: [PATCH] Added missing WMS 1.1 ScaleHint handling

---
 src/map/wms.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/map/wms.cpp b/src/map/wms.cpp
index fafc3fe3..0567f908 100644
--- a/src/map/wms.cpp
+++ b/src/map/wms.cpp
@@ -1,3 +1,4 @@
+#include <cmath>
 #include <QFileInfo>
 #include <QEventLoop>
 #include <QXmlStreamReader>
@@ -7,6 +8,11 @@
 #include "wms.h"
 
 
+static inline double hint2denominator(double h)
+{
+	return sqrt((h * h) / 2.0) / 0.28e-3;
+}
+
 WMS::CTX::CTX(const Setup &setup) : setup(setup), formatSupported(false)
 {
 	QStringList ll = setup.layer().split(',');
@@ -97,7 +103,13 @@ void WMS::layer(QXmlStreamReader &reader, CTX &ctx,
 			CRSs.append(reader.readElementText());
 		else if (reader.name() == "Style")
 			styles.append(style(reader));
-		else if (reader.name() == "MinScaleDenominator") {
+		else if (reader.name() == "ScaleHint") {
+			QXmlStreamAttributes attr = reader.attributes();
+			double minHint = attr.value("min").toString().toDouble();
+			double maxHint = attr.value("max").toString().toDouble();
+			scaleDenominator.setMin(hint2denominator(minHint));
+			scaleDenominator.setMax(hint2denominator(maxHint));
+		} else if (reader.name() == "MinScaleDenominator") {
 			double sd = reader.readElementText().toDouble();
 			if (sd > 0)
 				scaleDenominator.setMin(sd);