1 files changed, 97 insertions, 0 deletions
diff --git a/src/main/java/com/kitfox/svg/composite/AdobeCompositeContext.java b/src/main/java/com/kitfox/svg/composite/AdobeCompositeContext.java
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+/*
+ * AdobeCompositeContext.java
+ *
+ *
+ *  The Salamander Project - 2D and 3D graphics libraries in Java
+ *  Copyright (C) 2004 Mark McKay
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *  Mark McKay can be contacted at mark@kitfox.com.  Salamander and other
+ *  projects can be found at http://www.kitfox.com
+ *
+ * Created on April 1, 2004, 6:41 AM
+ */
+
+package com.kitfox.svg.composite;
+
+import java.awt.*;
+import java.awt.image.*;
+
+/**
+ * @author Mark McKay
+ * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
+ */
+public class AdobeCompositeContext implements CompositeContext
+{
+    final int compositeType;
+    final float extraAlpha;
+
+    float[] rgba_src = new float[4];
+    float[] rgba_dstIn = new float[4];
+    float[] rgba_dstOut = new float[4];
+
+    /** Creates a new instance of AdobeCompositeContext */
+    public AdobeCompositeContext(int compositeType, float extraAlpha)
+    {
+        this.compositeType = compositeType;
+        this.extraAlpha = extraAlpha;
+
+        rgba_dstOut[3] = 1f;
+    }
+
+    public void compose(Raster src, Raster dstIn, WritableRaster dstOut)
+    {
+        int width = src.getWidth();
+        int height = src.getHeight();
+
+        for (int j = 0; j < height; j++)
+        {
+            for (int i = 0; i < width; i++)
+            {
+                src.getPixel(i, j, rgba_src);
+                dstIn.getPixel(i, j, rgba_dstIn);
+
+                //Ignore transparent pixels
+                if (rgba_src[3] == 0)
+                {
+//                    dstOut.setPixel(i, j, rgba_dstIn);
+                    continue;
+                }
+
+                float alpha = rgba_src[3];
+
+                switch (compositeType)
+                {
+                    default:
+                    case AdobeComposite.CT_NORMAL:
+                        rgba_dstOut[0] = rgba_src[0] * alpha + rgba_dstIn[0] * (1f - alpha);
+                        rgba_dstOut[1] = rgba_src[1] * alpha + rgba_dstIn[1] * (1f - alpha);
+                        rgba_dstOut[2] = rgba_src[2] * alpha + rgba_dstIn[2] * (1f - alpha);
+                        break;
+                    case AdobeComposite.CT_MULTIPLY:
+                        rgba_dstOut[0] = rgba_src[0] * rgba_dstIn[0] * alpha + rgba_dstIn[0] * (1f - alpha);
+                        rgba_dstOut[1] = rgba_src[1] * rgba_dstIn[1] * alpha + rgba_dstIn[1] * (1f - alpha);
+                        rgba_dstOut[2] = rgba_src[2] * rgba_dstIn[2] * alpha + rgba_dstIn[2] * (1f - alpha);
+                        break;
+                }
+            }
+        }
+    }
+
+    public void dispose() {
+    }
+
+}