Core now moved to common.

2026-05-21 00:00:01 -04:00 · 2009-11-08 19:01:36 +01:00
parent e0a6c0a2bd
commit 7167a7a4ad
36 changed files with 36 additions and 223 deletions
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2008, Harald Kuhr
+ * 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 "TwelveMonkeys" 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 com.twelvemonkeys.image;
+
+import java.awt.*;
+
+/**
+ * GraphicsUtil
+ *
+ * @author <a href="mailto:harald.kuhr@gmail.no">Harald Kuhr</a>
+ * @author last modified by $Author: haku $
+ * @version $Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/image/GraphicsUtil.java#1 $
+ */
+public final class GraphicsUtil {
+
+    /**
+     * Enables anti-aliasing in the {@code Graphics} object.
+     * <p/>
+     * Anti-aliasing is enabled by casting to {@code Graphics2D} and setting
+     * the rendering hint {@code RenderingHints.KEY_ANTIALIASING} to
+     * {@code RenderingHints.VALUE_ANTIALIAS_ON}.
+     *
+     * @param pGraphics the graphics object
+     * @throws ClassCastException if {@code pGraphics} is not an instance of
+     *         {@code Graphics2D}.
+     *
+     * @see java.awt.RenderingHints#KEY_ANTIALIASING
+     */
+    public static void enableAA(final Graphics pGraphics) {
+        ((Graphics2D) pGraphics).setRenderingHint(
+                RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON
+        );
+    }
+
+    /**
+     * Sets the alpha in the {@code Graphics} object.
+     * <p/>
+     * Alpha is set by casting to {@code Graphics2D} and setting the composite
+     * to the rule {@code AlphaComposite.SRC_OVER} multiplied by the given
+     * alpha.
+     *
+     * @param pGraphics the graphics object
+     * @param pAlpha the alpha level, {@code alpha} must be a floating point
+     *        number in the inclusive range [0.0,&nbsp;1.0].
+     * @throws ClassCastException if {@code pGraphics} is not an instance of
+     *         {@code Graphics2D}.
+     *
+     * @see java.awt.AlphaComposite#SRC_OVER
+     * @see java.awt.AlphaComposite#getInstance(int, float)
+     */
+    public static void setAlpha(final Graphics pGraphics, final float pAlpha) {
+        ((Graphics2D) pGraphics).setComposite(
+                AlphaComposite.getInstance(AlphaComposite.SRC_OVER, pAlpha)
+        );
+    }
+}