The silkscreen print-out has a separate page for parts placed on the bottom of the board

diylc/diylc-swing/src/main/java/org/diylc/swing/plugins/file/SilkScreenDrawingProvider.java

@@ -23,6 +23,9 @@ package org.diylc.swing.plugins.file;
 
 import org.diylc.common.DrawOption;
 import org.diylc.common.IPlugInPort;
+import org.diylc.common.PCBLayer;
+import org.diylc.core.IBoardSideComponent;
+import org.diylc.core.IDIYComponent;
 import org.diylc.filter.PCBLayerFilter;
 import org.diylc.filter.SilkScreenFilter;
 import org.diylc.swingframework.IDrawingProvider;
@@ -53,11 +56,17 @@ public class SilkScreenDrawingProvider implements IDrawingProvider {
   @Override
   public void draw(int page, Graphics g, double zoomFactor) {
     plugInPort.draw((Graphics2D) g, EnumSet.of(DrawOption.ANTIALIASING, DrawOption.OUTLINE_MODE, DrawOption.MONOCHROMATIC),
-        new SilkScreenFilter(), zoomFactor, null, null);
+        new SilkScreenFilter(page == 0 ? PCBLayer._2 : PCBLayer._1), zoomFactor, null, null);
   }
 
+  // the top side, followed by the bottom side when a part is mounted there
   @Override
   public int getPageCount() {
+    for (IDIYComponent<?> c : plugInPort.getCurrentProject().getComponents()) {
+      if (c instanceof IBoardSideComponent && ((IBoardSideComponent) c).getBoardSide() == PCBLayer._1) {
+        return 2;
+      }
+    }
     return 1;
   }
 }

diylc/diylc-swing/src/test/java/org/diylc/swing/plugins/file/SilkScreenDrawingProviderTest.java

@@ -0,0 +1,50 @@
+/*
+
+    DIY Layout Creator (DIYLC).
+    Copyright (c) 2009-2025 held jointly by the individual authors.
+
+    This file is part of DIYLC.
+
+    DIYLC is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    DIYLC is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DIYLC.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+package org.diylc.swing.plugins.file;
+
+import static org.junit.Assert.assertEquals;
+
+import java.awt.Point;
+
+import org.diylc.TestBase;
+import org.diylc.common.PCBLayer;
+import org.diylc.components.passive.Resistor;
+import org.junit.Test;
+
+public class SilkScreenDrawingProviderTest extends TestBase {
+
+  @Test
+  public void testOnePageWithoutBottomParts() {
+    instantiateTwoClick("Passive", "Resistor", new Point(1000, 1000), new Point(1200, 1000));
+
+    assertEquals(1, new SilkScreenDrawingProvider(presenter).getPageCount());
+  }
+
+  @Test
+  public void testBottomPageForBottomParts() {
+    instantiateTwoClick("Passive", "Resistor", new Point(1000, 1000), new Point(1200, 1000));
+    Resistor resistor = (Resistor) presenter.getCurrentProject().getComponents().get(0);
+    resistor.setBoardSide(PCBLayer._1);
+
+    assertEquals(2, new SilkScreenDrawingProvider(presenter).getPageCount());
+  }
+}