Skip unnecessary dive map rendering, fix rendering small connections

include/editor.h

@@ -78,6 +78,7 @@ public:
     void setMapEditingButtonsEnabled(bool enabled);
     void setConnectionsVisibility(bool visible);
     void updateDivingMapsVisibility();
+    void displayDivingConnections();
     void addConnection(MapConnection* connection);
     void removeConnection(MapConnection* connection);
     void removeSelectedConnection();

include/ui/divingmappixmapitem.h

@@ -13,7 +13,6 @@ public:
     : QGraphicsPixmapItem(getBasePixmap(connection))
     {
         m_connection = connection;
-        setZValue(2);
 
         // Update pixmap if the connected map is swapped.
         connect(m_connection, &MapConnection::targetMapNameChanged, this, &DivingMapPixmapItem::updatePixmap);

src/core/map.cpp

@@ -216,23 +216,29 @@ QPixmap Map::renderBorder(bool ignoreCache) {
 }
 
 QPixmap Map::renderConnection(const QString &direction, MapLayout * fromLayout) {
-    if (direction == "dive" || direction == "emerge")
-        return render(true);
-
-    if (!MapConnection::isCardinal(direction))
-        return QPixmap();
-
+    // Cardinal connections are rendered within the bounds of the border draw distance,
+    // and we need to render the nearest segment of the map.
+    // Dive/Emerge maps are rendered normally, but within the bounds of their parent map.
     int x = 0, y = 0, w = getWidth(), h = getHeight();
     if (direction == "up") {
-        y = getHeight() - BORDER_DISTANCE;
-        h = BORDER_DISTANCE;
+        h = qMin(h, BORDER_DISTANCE);
+        y = getHeight() - h;
     } else if (direction == "down") {
-        h = BORDER_DISTANCE;
+        h = qMin(h, BORDER_DISTANCE);
     } else if (direction == "left") {
-        x = getWidth() - BORDER_DISTANCE;
-        w = BORDER_DISTANCE;
+        w = qMin(w, BORDER_DISTANCE);
+        x = getWidth() - w;
     } else if (direction == "right") {
-        w = BORDER_DISTANCE;
+        w = qMin(w, BORDER_DISTANCE);
+    } else if (MapConnection::isDiving(direction)) {
+        if (fromLayout) {
+            w = qMin(w, fromLayout->getWidth());
+            h = qMin(h, fromLayout->getHeight());
+            fromLayout = nullptr; // This would be used for palettes later, but we want our own palettes, not the parent's.
+        }
+    } else {
+        // Unknown direction
+        return QPixmap();
     }
 
     render(true, fromLayout, QRect(x, y, w, h));

src/editor.cpp

@@ -737,10 +737,6 @@ void Editor::displayConnection(MapConnection* connection) {
     if (!connection)
         return;
 
-    // It's possible for a map connection to be displayed repeatedly if it's being
-    // updated by mirroring and the target map is changing to/from the current map.
-    connection->disconnect();
-
     if (MapConnection::isDiving(connection->direction())) {
         displayDivingConnection(connection);
         return;
@@ -758,6 +754,10 @@ void Editor::displayConnection(MapConnection* connection) {
     ConnectionsListItem *listItem = new ConnectionsListItem(ui->scrollAreaContents_ConnectionsList, pixmapItem->connection, project->mapNames);
     ui->layout_ConnectionsList->insertWidget(ui->layout_ConnectionsList->count() - 1, listItem); // Insert above the vertical spacer
 
+    // It's possible for a map connection to be displayed repeatedly if it's being
+    // updated by mirroring and the target map is changing to/from the current map.
+    connection->disconnect();
+
     // Double clicking the list item or pixmap opens the connected map
     connect(listItem, &ConnectionsListItem::doubleClicked, this, &Editor::onMapConnectionDoubleClicked);
     connect(pixmapItem, &ConnectionPixmapItem::connectionItemDoubleClicked, this, &Editor::onMapConnectionDoubleClicked);
@@ -871,6 +871,14 @@ void Editor::removeConnectionPixmap(MapConnection* connection) {
     delete pixmapItem;
 }
 
+void Editor::displayDivingConnections() {
+    if (!this->map)
+        return;
+
+    for (auto connection : this->map->getConnections())
+        displayDivingConnection(connection);
+}
+
 void Editor::displayDivingConnection(MapConnection* connection) {
     if (!connection)
         return;
@@ -879,6 +887,10 @@ void Editor::displayDivingConnection(MapConnection* connection) {
     if (!MapConnection::isDiving(direction))
         return;
 
+    // Save some rendering time if it won't be displayed
+    if (!porymapConfig.showDiveEmergeMaps)
+        return;
+
     // Note: We only support editing 1 Dive and Emerge connection per map.
     //       In a vanilla game only the first Dive/Emerge connection is considered, so allowing
     //       users to have multiple is likely to lead to confusion. In case users have changed
@@ -890,7 +902,6 @@ void Editor::displayDivingConnection(MapConnection* connection) {
     auto item = new DivingMapPixmapItem(connection);
     scene->addItem(item);
     diving_map_items.insert(direction, item);
-    maskNonVisibleConnectionTiles();
 
     // Display map name in combo box
     auto comboBox = (direction == "dive") ? ui->comboBox_DiveMap : ui->comboBox_EmergeMap;
@@ -963,7 +974,6 @@ void Editor::setDivingMapName(QString mapName, QString direction) {
         addConnection(new MapConnection(mapName, direction));
     }
     updateDivingMapsVisibility();
-    maskNonVisibleConnectionTiles();
 }
 
 void Editor::updateDivingMapsVisibility() {
@@ -1810,7 +1820,6 @@ void Editor::maskNonVisibleConnectionTiles() {
     QBrush brush(ui->graphicsView_Map->palette().color(QPalette::Active, QPalette::Base));
 
     connection_mask = scene->addPath(mask, pen, brush);
-    connection_mask->setZValue(3); // Above diving maps
 }
 
 void Editor::clearMapBorder() {

src/mainwindow.cpp

@@ -2302,6 +2302,12 @@ void MainWindow::setDivingMapsVisible(bool visible) {
     ui->actionDive_Emerge_Map->setChecked(visible);
 
     porymapConfig.showDiveEmergeMaps = visible;
+
+    if (visible) {
+        // We skip rendering diving maps if this setting is not enabled,
+        // so when we enable it we need to make sure they've rendered.
+        this->editor->displayDivingConnections();
+    }
     this->editor->updateDivingMapsVisibility();
 }