Fixed main chat room lag

cockatrice/src/gamesmodel.cpp

@@ -151,7 +151,7 @@ QVariant GamesModel::data(const QModelIndex &index, int role) const
                 return result.join(", ");
             }
             case Qt::DecorationRole:{
-                return g.with_password() ? QIcon(":/resources/lock.svg") : QVariant();
+                return g.with_password() ? QIcon(LockPixmapGenerator::generatePixmap(13)) : QVariant();
             case Qt::TextAlignmentRole:
                 return Qt::AlignLeft;
             default:

cockatrice/src/pixmapgenerator.cpp

@@ -166,3 +166,24 @@ QPixmap UserLevelPixmapGenerator::generatePixmap(int height, UserLevelFlags user
 }
 
 QMap<int, QPixmap> UserLevelPixmapGenerator::pmCache;
+
+
+QPixmap LockPixmapGenerator::generatePixmap(int height)
+{
+
+    int key = height;
+    if (pmCache.contains(key))
+        return pmCache.value(key);
+
+    QSvgRenderer svg(QString(":/resources/lock.svg"));
+    int width = (int) round(height * (double) svg.defaultSize().width() / (double) svg.defaultSize().height());
+    QPixmap pixmap(width, height);
+    pixmap.fill(Qt::transparent);
+    QPainter painter(&pixmap);
+    svg.render(&painter, QRectF(0, 0, width, height));
+
+    pmCache.insert(key, pixmap);
+    return pixmap;
+}
+
+QMap<int, QPixmap> LockPixmapGenerator::pmCache;

cockatrice/src/pixmapgenerator.h

@@ -54,4 +54,12 @@ public:
     static void clear() { pmCache.clear(); }
 };
 
+class LockPixmapGenerator {
+private:
+    static QMap<int, QPixmap> pmCache;
+public:
+    static QPixmap generatePixmap(int height);
+    static void clear() { pmCache.clear(); }
+};
+
 #endif