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/*
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* Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.awt.image;
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import java.awt.geom.AffineTransform;
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import java.awt.image.AffineTransformOp;
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import java.awt.image.BufferedImage;
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import java.awt.image.BufferedImageOp;
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import java.awt.image.ByteLookupTable;
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import java.awt.image.ConvolveOp;
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import java.awt.image.Kernel;
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import java.awt.image.LookupOp;
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import java.awt.image.LookupTable;
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import java.awt.image.RasterOp;
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import java.awt.image.Raster;
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import java.awt.image.WritableRaster;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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/**
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* This class provides a hook to access platform-specific
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* imaging code.
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*
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* If the implementing class cannot handle the op, tile format or
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* image format, the method will return null;
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* If there is an error when processing the
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* data, the implementing class may either return null
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* (in which case our java code will be executed) or may throw
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* an exception.
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*/
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public class ImagingLib {
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static boolean useLib = true;
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static boolean verbose = false;
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private static final int NUM_NATIVE_OPS = 3;
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private static final int LOOKUP_OP = 0;
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private static final int AFFINE_OP = 1;
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private static final int CONVOLVE_OP = 2;
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private static Class[] nativeOpClass = new Class[NUM_NATIVE_OPS];
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/**
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* Returned value indicates whether the library initailization was
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* succeded.
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*
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* There could be number of reasons to failure:
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* - failed to load library.
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* - failed to get all required entry points.
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*/
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private static native boolean init();
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static public native int transformBI(BufferedImage src, BufferedImage dst,
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double[] matrix, int interpType);
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static public native int transformRaster(Raster src, Raster dst,
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double[] matrix,
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int interpType);
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static public native int convolveBI(BufferedImage src, BufferedImage dst,
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Kernel kernel, int edgeHint);
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static public native int convolveRaster(Raster src, Raster dst,
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Kernel kernel, int edgeHint);
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static public native int lookupByteBI(BufferedImage src, BufferedImage dst,
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byte[][] table);
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static public native int lookupByteRaster(Raster src, Raster dst,
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byte[][] table);
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static {
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PrivilegedAction<Boolean> doMlibInitialization =
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new PrivilegedAction<Boolean>() {
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public Boolean run() {
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String arch = System.getProperty("os.arch");
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if (arch == null || !arch.startsWith("sparc")) {
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try {
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System.loadLibrary("mlib_image");
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} catch (UnsatisfiedLinkError e) {
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return Boolean.FALSE;
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}
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}
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boolean success = init();
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return Boolean.valueOf(success);
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}
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};
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useLib = AccessController.doPrivileged(doMlibInitialization);
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//
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// Cache the class references of the operations we know about
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// at the time this class is initially loaded.
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//
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try {
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nativeOpClass[LOOKUP_OP] =
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Class.forName("java.awt.image.LookupOp");
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} catch (ClassNotFoundException e) {
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System.err.println("Could not find class: "+e);
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}
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try {
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nativeOpClass[AFFINE_OP] =
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Class.forName("java.awt.image.AffineTransformOp");
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} catch (ClassNotFoundException e) {
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System.err.println("Could not find class: "+e);
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}
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try {
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nativeOpClass[CONVOLVE_OP] =
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Class.forName("java.awt.image.ConvolveOp");
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} catch (ClassNotFoundException e) {
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System.err.println("Could not find class: "+e);
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}
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}
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private static int getNativeOpIndex(Class opClass) {
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//
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// Search for this class in cached list of
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// classes supplying native acceleration
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//
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int opIndex = -1;
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for (int i=0; i<NUM_NATIVE_OPS; i++) {
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if (opClass == nativeOpClass[i]) {
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opIndex = i;
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break;
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}
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}
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return opIndex;
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}
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public static WritableRaster filter(RasterOp op, Raster src,
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WritableRaster dst) {
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if (useLib == false) {
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return null;
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}
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// Create the destination tile
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if (dst == null) {
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dst = op.createCompatibleDestRaster(src);
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}
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WritableRaster retRaster = null;
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switch (getNativeOpIndex(op.getClass())) {
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case LOOKUP_OP:
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// REMIND: Fix this!
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LookupTable table = ((LookupOp)op).getTable();
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if (table.getOffset() != 0) {
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// Right now the native code doesn't support offsets
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return null;
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}
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if (table instanceof ByteLookupTable) {
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ByteLookupTable bt = (ByteLookupTable) table;
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if (lookupByteRaster(src, dst, bt.getTable()) > 0) {
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retRaster = dst;
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}
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}
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break;
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case AFFINE_OP:
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AffineTransformOp bOp = (AffineTransformOp) op;
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double[] matrix = new double[6];
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bOp.getTransform().getMatrix(matrix);
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if (transformRaster(src, dst, matrix,
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bOp.getInterpolationType()) > 0) {
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retRaster = dst;
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}
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break;
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case CONVOLVE_OP:
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ConvolveOp cOp = (ConvolveOp) op;
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if (convolveRaster(src, dst,
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cOp.getKernel(), cOp.getEdgeCondition()) > 0) {
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retRaster = dst;
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}
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break;
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default:
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break;
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}
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if (retRaster != null) {
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SunWritableRaster.markDirty(retRaster);
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}
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return retRaster;
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}
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public static BufferedImage filter(BufferedImageOp op, BufferedImage src,
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BufferedImage dst)
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{
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if (verbose) {
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System.out.println("in filter and op is "+op
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+ "bufimage is "+src+" and "+dst);
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}
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if (useLib == false) {
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return null;
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}
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// Create the destination image
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if (dst == null) {
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dst = op.createCompatibleDestImage(src, null);
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}
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BufferedImage retBI = null;
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switch (getNativeOpIndex(op.getClass())) {
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case LOOKUP_OP:
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// REMIND: Fix this!
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LookupTable table = ((LookupOp)op).getTable();
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if (table.getOffset() != 0) {
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// Right now the native code doesn't support offsets
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return null;
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}
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if (table instanceof ByteLookupTable) {
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ByteLookupTable bt = (ByteLookupTable) table;
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if (lookupByteBI(src, dst, bt.getTable()) > 0) {
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retBI = dst;
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}
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}
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break;
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case AFFINE_OP:
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AffineTransformOp bOp = (AffineTransformOp) op;
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double[] matrix = new double[6];
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AffineTransform xform = bOp.getTransform();
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bOp.getTransform().getMatrix(matrix);
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if (transformBI(src, dst, matrix,
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bOp.getInterpolationType())>0) {
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retBI = dst;
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}
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break;
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case CONVOLVE_OP:
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ConvolveOp cOp = (ConvolveOp) op;
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if (convolveBI(src, dst, cOp.getKernel(),
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cOp.getEdgeCondition()) > 0) {
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retBI = dst;
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}
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break;
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default:
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break;
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}
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if (retBI != null) {
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SunWritableRaster.markDirty(retBI);
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}
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return retBI;
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}
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}
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