1 files changed, 109 insertions, 0 deletions
diff --git a/src/proguard/gui/splash/ShadowedSprite.java b/src/proguard/gui/splash/ShadowedSprite.java
new file mode 100644
index 0000000..c3504f3
--- /dev/null
+++ b/src/proguard/gui/splash/ShadowedSprite.java
@@ -0,0 +1,109 @@
+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
+ *
+ * This program 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 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package proguard.gui.splash;
+
+import java.awt.*;
+
+/**
+ * This Sprite adds a drop shadow to another Sprite.
+ *
+ * @author Eric Lafortune
+ */
+public class ShadowedSprite implements Sprite
+{
+    private final VariableInt    xOffset;
+    private final VariableInt    yOffset;
+    private final VariableDouble alpha;
+    private final VariableInt    blur;
+    private final Sprite         sprite;
+
+    private float cachedAlpha = -1.0f;
+    private Color cachedColor;
+
+
+    /**
+     * Creates a new ShadowedSprite.
+     * @param xOffset the variable x-offset of the shadow, relative to the sprite itself.
+     * @param yOffset the variable y-offset of the shadow, relative to the sprite itself.
+     * @param alpha   the variable darkness of the shadow (between 0 and 1).
+     * @param blur    the variable blur of the shadow (0 for sharp shadows, 1 or
+     *                more for increasingly blurry shadows).
+     * @param sprite  the Sprite to be painted with its shadow.
+     */
+    public ShadowedSprite(VariableInt    xOffset,
+                          VariableInt    yOffset,
+                          VariableDouble alpha,
+                          VariableInt    blur,
+                          Sprite         sprite)
+    {
+        this.xOffset = xOffset;
+        this.yOffset = yOffset;
+        this.alpha   = alpha;
+        this.blur    = blur;
+        this.sprite  = sprite;
+    }
+
+
+    // Implementation for Sprite.
+
+    public void paint(Graphics graphics, long time)
+    {
+        double l = alpha.getDouble(time);
+        int    b = blur.getInt(time) + 1;
+
+        float a = 1.0f - (float)Math.pow(1.0 - l, 1.0/(b*b));
+        if (a != cachedAlpha)
+        {
+            cachedAlpha = a;
+            cachedColor = new Color(0f, 0f, 0f, a);
+        }
+
+        // Set up the shadow graphics.
+        //OverrideGraphics2D g = new OverrideGraphics2D((Graphics2D)graphics);
+        //g.setOverrideColor(cachedColor);
+
+        // Set the shadow color.
+        Color actualColor = graphics.getColor();
+        graphics.setColor(cachedColor);
+
+        int xo = xOffset.getInt(time) - b/2;
+        int yo = yOffset.getInt(time) - b/2;
+
+        // Draw the sprite's shadow.
+        for (int x = 0; x < b; x++)
+        {
+            for (int y = 0; y < b; y++)
+            {
+                int xt = xo + x;
+                int yt = yo + y;
+                graphics.translate(xt, yt);
+                sprite.paint(graphics, time);
+                graphics.translate(-xt, -yt);
+            }
+        }
+
+        // Restore the actual sprite color.
+        graphics.setColor(actualColor);
+
+        // Draw the sprite itself in the ordinary graphics.
+        sprite.paint(graphics, time);
+    }
+}