8334124: Rendering issues with CSS "text-shadow" in WebView

Backport-of: e0ceafb7dba15b4faa683c336828e79f19a59d30
openjdk · Sep 3, 2024 · ece461b · ece461b · openjdk-notifier · Sep 3, 2024
1 parent 5a81743
commit ece461b
Show file tree

Hide file tree

Showing 2 changed files with 84 additions and 0 deletions.
diff --git a/.../javafx.web/src/main/native/Source/WebCore/platform/graphics/java/GraphicsContextJava.cpp b/.../javafx.web/src/main/native/Source/WebCore/platform/graphics/java/GraphicsContextJava.cpp
@@ -1025,6 +1025,11 @@ void GraphicsContextJava::didUpdateState(GraphicsContextState& state)
         if (dropShadowOpt.has_value()) {
             const auto& dropShadow = dropShadowOpt.value();
             setPlatformShadow(dropShadow.offset,dropShadow.radius, dropShadow.color);
+        } else {
+            float clr = 0.0f;
+            platformContext()->rq().freeSpace(32)
+            << (jint)com_sun_webkit_graphics_GraphicsDecoder_SETSHADOW
+            << clr << clr << clr << clr << clr << clr << clr;
         }
     }
 

diff --git a/modules/javafx.web/src/test/java/test/javafx/scene/web/ShadowTest.java b/modules/javafx.web/src/test/java/test/javafx/scene/web/ShadowTest.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package test.javafx.scene.web;
+
+import com.sun.webkit.WebPage;
+import com.sun.webkit.WebPageShim;
+import javafx.scene.web.WebEngineShim;
+import org.junit.Test;
+
+import java.awt.Color;
+import java.awt.image.BufferedImage;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+public class ShadowTest extends TestBase {
+    /**
+     * @test
+     * @bug 8334124
+     * summary
+     * Paints an text with a red shadow, and another text without shadow.
+     * Checks by red pixel count if the shadow exists and only exists on the first text.
+     */
+    @Test public void testShadow() {
+        loadContent("<html>\n" +
+                    "<body style='margin: 0px;'>\n" +
+                    "<p style='text-shadow:5px 5px 0 #FF0000;height: 100px;'>text</p>\n" +
+                    "<p style='height: 100px'>text</p>\n" +
+                    "</body>\n" +
+                    "</html>");
+        submit(() -> {
+                final WebPage webPage = WebEngineShim.getPage(getEngine());
+                assertNotNull(webPage);
+                final BufferedImage img = WebPageShim.paint(webPage, 0, 0, 800, 600);
+                assertNotNull(img);
+
+                int redShadowCnt = 0;
+                int noShadowCnt = 0;
+                for (int x = 0; x < 100; x++) {
+                    for (int y = 0; y < 200; y++) {
+                        Color pixelColor = new Color(img.getRGB(x, y), true);
+                        if (isColorsSimilar(Color.RED, pixelColor, 1)) {
+                            if (y < 100) {
+                                redShadowCnt++;
+                            } else {
+                                noShadowCnt++;
+                            }
+                        }
+                    }
+                }
+
+                assertTrue("no shadow found", redShadowCnt > 0);
+                assertTrue("wrong shadow found", noShadowCnt == 0);
+        });
+    }
+}