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	/*
	* Copyright (c) 1997, 2007, 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 sun.awt.image;

	import java.awt.geom.AffineTransform;
	import java.awt.image.AffineTransformOp;
	import java.awt.image.BufferedImage;
	import java.awt.image.BufferedImageOp;
	import java.awt.image.ByteLookupTable;
	import java.awt.image.ConvolveOp;
	import java.awt.image.Kernel;
	import java.awt.image.LookupOp;
	import java.awt.image.LookupTable;
	import java.awt.image.RasterOp;
	import java.awt.image.Raster;
	import java.awt.image.WritableRaster;
	import java.security.AccessController;
	import java.security.PrivilegedAction;

	/**
	* This class provides a hook to access platform-specific
	* imaging code.
	*
	* If the implementing class cannot handle the op, tile format or
	* image format, the method will return null;
	* If there is an error when processing the
	* data, the implementing class may either return null
	* (in which case our java code will be executed) or may throw
	* an exception.
	*/
	public class ImagingLib {

	static boolean useLib = true;
	static boolean verbose = false;

	private static final int NUM_NATIVE_OPS = 3;
	private static final int LOOKUP_OP = 0;
	private static final int AFFINE_OP = 1;
	private static final int CONVOLVE_OP = 2;

	private static Class[] nativeOpClass = new Class[NUM_NATIVE_OPS];

	/**
	* Returned value indicates whether the library initailization was
	* succeded.
	*
	* There could be number of reasons to failure:
	* - failed to load library.
	* - failed to get all required entry points.
	*/
	private static native boolean init();

	static public native int transformBI(BufferedImage src, BufferedImage dst,
	double[] matrix, int interpType);
	static public native int transformRaster(Raster src, Raster dst,
	double[] matrix,
	int interpType);
	static public native int convolveBI(BufferedImage src, BufferedImage dst,
	Kernel kernel, int edgeHint);
	static public native int convolveRaster(Raster src, Raster dst,
	Kernel kernel, int edgeHint);
	static public native int lookupByteBI(BufferedImage src, BufferedImage dst,
	byte[][] table);
	static public native int lookupByteRaster(Raster src, Raster dst,
	byte[][] table);

	static {

	PrivilegedAction<Boolean> doMlibInitialization =
	new PrivilegedAction<Boolean>() {
	public Boolean run() {
	String arch = System.getProperty("os.arch");

	if (arch == null \|\| !arch.startsWith("sparc")) {
	try {
	System.loadLibrary("mlib_image");
	} catch (UnsatisfiedLinkError e) {
	return Boolean.FALSE;
	}

	}
	boolean success = init();
	return Boolean.valueOf(success);
	}
	};

	useLib = AccessController.doPrivileged(doMlibInitialization);

	//
	// Cache the class references of the operations we know about
	// at the time this class is initially loaded.
	//
	try {
	nativeOpClass[LOOKUP_OP] =
	Class.forName("java.awt.image.LookupOp");
	} catch (ClassNotFoundException e) {
	System.err.println("Could not find class: "+e);
	}
	try {
	nativeOpClass[AFFINE_OP] =
	Class.forName("java.awt.image.AffineTransformOp");
	} catch (ClassNotFoundException e) {
	System.err.println("Could not find class: "+e);
	}
	try {
	nativeOpClass[CONVOLVE_OP] =
	Class.forName("java.awt.image.ConvolveOp");
	} catch (ClassNotFoundException e) {
	System.err.println("Could not find class: "+e);
	}

	}

	private static int getNativeOpIndex(Class opClass) {
	//
	// Search for this class in cached list of
	// classes supplying native acceleration
	//
	int opIndex = -1;
	for (int i=0; i<NUM_NATIVE_OPS; i++) {
	if (opClass == nativeOpClass[i]) {
	opIndex = i;
	break;
	}
	}
	return opIndex;
	}


	public static WritableRaster filter(RasterOp op, Raster src,
	WritableRaster dst) {
	if (useLib == false) {
	return null;
	}

	// Create the destination tile
	if (dst == null) {
	dst = op.createCompatibleDestRaster(src);
	}


	WritableRaster retRaster = null;
	switch (getNativeOpIndex(op.getClass())) {

	case LOOKUP_OP:
	// REMIND: Fix this!
	LookupTable table = ((LookupOp)op).getTable();
	if (table.getOffset() != 0) {
	// Right now the native code doesn't support offsets
	return null;
	}
	if (table instanceof ByteLookupTable) {
	ByteLookupTable bt = (ByteLookupTable) table;
	if (lookupByteRaster(src, dst, bt.getTable()) > 0) {
	retRaster = dst;
	}
	}
	break;

	case AFFINE_OP:
	AffineTransformOp bOp = (AffineTransformOp) op;
	double[] matrix = new double[6];
	bOp.getTransform().getMatrix(matrix);
	if (transformRaster(src, dst, matrix,
	bOp.getInterpolationType()) > 0) {
	retRaster = dst;
	}
	break;

	case CONVOLVE_OP:
	ConvolveOp cOp = (ConvolveOp) op;
	if (convolveRaster(src, dst,
	cOp.getKernel(), cOp.getEdgeCondition()) > 0) {
	retRaster = dst;
	}
	break;

	default:
	break;
	}

	if (retRaster != null) {
	SunWritableRaster.markDirty(retRaster);
	}

	return retRaster;
	}


	public static BufferedImage filter(BufferedImageOp op, BufferedImage src,
	BufferedImage dst)
	{
	if (verbose) {
	System.out.println("in filter and op is "+op
	+ "bufimage is "+src+" and "+dst);
	}

	if (useLib == false) {
	return null;
	}

	// Create the destination image
	if (dst == null) {
	dst = op.createCompatibleDestImage(src, null);
	}

	BufferedImage retBI = null;
	switch (getNativeOpIndex(op.getClass())) {

	case LOOKUP_OP:
	// REMIND: Fix this!
	LookupTable table = ((LookupOp)op).getTable();
	if (table.getOffset() != 0) {
	// Right now the native code doesn't support offsets
	return null;
	}
	if (table instanceof ByteLookupTable) {
	ByteLookupTable bt = (ByteLookupTable) table;
	if (lookupByteBI(src, dst, bt.getTable()) > 0) {
	retBI = dst;
	}
	}
	break;

	case AFFINE_OP:
	AffineTransformOp bOp = (AffineTransformOp) op;
	double[] matrix = new double[6];
	AffineTransform xform = bOp.getTransform();
	bOp.getTransform().getMatrix(matrix);

	if (transformBI(src, dst, matrix,
	bOp.getInterpolationType())>0) {
	retBI = dst;
	}
	break;

	case CONVOLVE_OP:
	ConvolveOp cOp = (ConvolveOp) op;
	if (convolveBI(src, dst, cOp.getKernel(),
	cOp.getEdgeCondition()) > 0) {
	retBI = dst;
	}
	break;

	default:
	break;
	}

	if (retBI != null) {
	SunWritableRaster.markDirty(retBI);
	}

	return retBI;
	}
	}

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