add a test case for issue #99 (blendMode="multiply" in NiftyGUI)

.gitignore

@@ -40,6 +40,7 @@
 !/jme3-bullet-native/libs/native/osx/x86_64/libbulletjme.dylib
 !/jme3-bullet-native/libs/native/linux/x86/libbulletjme.so
 !/jme3-bullet-native/libs/native/linux/x86_64/libbulletjme.so
+/jme3-examples/private/
 !/jme3-vr/src/main/resources/**/*.dylib
 !/jme3-vr/src/main/resources/**/*.so
 !/jme3-vr/src/main/resources/**/*.so.dbg

jme3-examples/src/main/java/jme3test/niftygui/TestIssue99.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2019 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package jme3test.niftygui;
+
+import com.jme3.app.SimpleApplication;
+import com.jme3.niftygui.NiftyJmeDisplay;
+import de.lessvoid.nifty.Nifty;
+import de.lessvoid.nifty.screen.Screen;
+import de.lessvoid.nifty.screen.ScreenController;
+
+/**
+ * Test case for JME issue #99: blendMode="multiply" in Nifty renders
+ * incorrectly.
+ * <p>
+ * If successful, two text labels will be visible. If unsuccessful, only the top
+ * one will be visible.
+ *
+ * @author Stephen Gold sgold@sonic.net
+ */
+public class TestIssue99
+        extends SimpleApplication
+        implements ScreenController {
+
+    public static void main(String[] args) {
+        TestIssue99 app = new TestIssue99();
+        app.start();
+    }
+
+    @Override
+    public void simpleInitApp() {
+        /*
+         * GUI requires a cursor; prevent flyCam from hiding it.
+         */
+        flyCam.setDragToRotate(true);
+        /*
+         * Start NiftyGUI without the batched renderer.
+         */
+        NiftyJmeDisplay niftyDisplay = new NiftyJmeDisplay(
+                assetManager, inputManager, audioRenderer, guiViewPort);
+        guiViewPort.addProcessor(niftyDisplay);
+        /*
+         * Load GUI controls, styles, and layout from XML assets.
+         */
+        Nifty nifty = niftyDisplay.getNifty();
+        nifty.loadControlFile("nifty-default-controls.xml");
+        nifty.loadStyleFile("nifty-default-styles.xml");
+        nifty.fromXml("Interface/Nifty/test-issue-99.xml",
+                "test-issue-99", this);
+    }
+
+    /**
+     * A callback from Nifty, invoked when the screen gets enabled for the first
+     * time.
+     *
+     * @param nifty (not null)
+     * @param screen (not null)
+     */
+    @Override
+    public void bind(Nifty nifty, Screen screen) {
+    }
+
+    /**
+     * A callback from Nifty, invoked each time the screen shuts down.
+     */
+    @Override
+    public void onEndScreen() {
+    }
+
+    /**
+     * A callback from Nifty, invoked each time the screen starts up.
+     */
+    @Override
+    public void onStartScreen() {
+    }
+}

jme3-examples/src/main/resources/Interface/Nifty/test-issue-99.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+The GUI layout for the TestIssue99 application.
+-->
+<nifty xmlns="http://nifty-gui.lessvoid.com/nifty-gui">
+    <screen id="test-issue-99"
+            controller="jme3test.niftygui.TestIssue99">
+        <layer childLayout="vertical">
+            <panel/>
+
+            <panel childLayout="horizontal"
+                   backgroundColor="#888f"
+                   height="160px">
+                <control name="label"
+                         color="#000f"
+                         text="The text of a label."
+                         width="*"/>
+            </panel>
+
+            <panel/>
+
+            <control name="scrollPanel"
+                     horizontal="false">
+                <panel childLayout="vertical">
+
+                    <panel childLayout="horizontal"
+                           backgroundColor="#888f"
+                           height="160px">
+                        <control name="label"
+                                 color="#000f"
+                                 text="The text of another label."
+                                 width="*"/>
+                    </panel>
+
+                </panel>
+            </control>
+
+            <panel/>
+        </layer>
+    </screen>
+</nifty>

jme3-testdata/build.gradle

@@ -10,4 +10,5 @@ repositories {
 
 dependencies {
     compile 'lessvoid:nifty-examples:1.4.1'
+    runtime 'com.github.nifty-gui:nifty-style-black:1.4.3'
 }