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The osx x86_64 swt jar as available in the Eclipse 4.6 (Neon) release for OSX. It is suitable for use with jface and other dependencies available from maven central in the org.eclipse.scout.sdk.deps group. The sources is copied from swt-4.6-cocoa-macosx-x86_64.zip from http://download.eclipse.org/eclipse/downloads/drops4/R-4.6-201606061100/ and javadoc is generated from sources.

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/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.internal.image;


final class JPEGQuantizationTable extends JPEGVariableSizeSegment {
	public static byte[] DefaultLuminanceQTable = {
		(byte)255, (byte)219, 0, 67, 0,
		16, 11, 10, 16, 24, 40, 51, 61,
		12, 12, 14, 19, 26, 58, 60, 55,
		14, 13, 16, 24, 40, 57, 69, 56,
		14, 17, 22, 29, 51, 87, 80, 62,
		18, 22, 37, 56, 68, 109, 103, 77,
		24, 35, 55, 64, 81, 104, 113, 92,
		49, 64, 78, 87, 103, 121, 120, 101,
		72, 92, 95, 98, 112, 100, 103, 99
	};
	public static byte[] DefaultChrominanceQTable = {
		(byte)255, (byte)219, 0, 67, 1,
		17, 18, 24, 47, 99, 99, 99, 99,
		18, 21, 26, 66, 99, 99, 99, 99,
		24, 26, 56, 99, 99, 99, 99, 99,
		47, 66, 99, 99, 99, 99, 99, 99,
		99, 99, 99, 99, 99, 99, 99, 99,
		99, 99, 99, 99, 99, 99, 99, 99,
		99, 99, 99, 99, 99, 99, 99, 99,
		99, 99, 99, 99, 99, 99, 99, 99
	};

public JPEGQuantizationTable(byte[] reference) {
	super(reference);
}

public JPEGQuantizationTable(LEDataInputStream byteStream) {
	super(byteStream);
}

public static JPEGQuantizationTable defaultChrominanceTable() {
	byte[] data = new byte[DefaultChrominanceQTable.length];
	System.arraycopy(DefaultChrominanceQTable, 0, data, 0, data.length);
	return new JPEGQuantizationTable(data);
}

public static JPEGQuantizationTable defaultLuminanceTable() {
	byte[] data = new byte[DefaultLuminanceQTable.length];
	System.arraycopy(DefaultLuminanceQTable, 0, data, 0, data.length);
	return new JPEGQuantizationTable(data);
}

public int[] getQuantizationTablesKeys() {
	int[] keys = new int[4];
	int keysIndex = 0;
	int totalLength = getSegmentLength() - 2;
	int ofs = 4;
	while (totalLength > 64) {
		int tq = reference[ofs] & 0xF;
		int pq = (reference[ofs] & 0xFF) >> 4;
		if (pq == 0) {
			ofs += 65;
			totalLength -= 65;
		} else {
			ofs += 129;
			totalLength -= 129;
		}
		if (keysIndex >= keys.length) {
			int[] newKeys = new int[keys.length + 4];
			System.arraycopy(keys, 0, newKeys, 0, keys.length);
			keys = newKeys;
		}
		keys[keysIndex] = tq;
		keysIndex++;
	}
	int[] newKeys = new int[keysIndex];
	System.arraycopy(keys, 0, newKeys, 0, keysIndex);
	return newKeys;
}

public int[][] getQuantizationTablesValues() {
	int[][] values = new int[4][];
	int valuesIndex = 0;
	int totalLength = getSegmentLength() - 2;
	int ofs = 4;
	while (totalLength > 64) {
		int[] qk = new int[64];
		int pq = (reference[ofs] & 0xFF) >> 4;
		if (pq == 0) {
			for (int i = 0; i < qk.length; i++) {
				qk[i] = reference[ofs + i + 1] & 0xFF;
			}
			ofs += 65;
			totalLength -= 65;
		} else {
			for (int i = 0; i < qk.length; i++) {
				int idx = (i - 1) * 2 ;
				qk[i] = (reference[ofs + idx + 1] & 0xFF) * 256 + (reference[ofs + idx + 2] & 0xFF);
			}
			ofs += 129;
			totalLength -= 129;
		}
		if (valuesIndex >= values.length) {
			int[][] newValues = new int[values.length + 4][];
			System.arraycopy(values, 0, newValues, 0, values.length);
			values = newValues;
		}
		values[valuesIndex] = qk;
		valuesIndex++;
	}
	int[][] newValues = new int[valuesIndex][];
	System.arraycopy(values, 0, newValues, 0, valuesIndex);
	return newValues;
}

public void scaleBy(int qualityFactor) {
	int qFactor = qualityFactor;
	if (qFactor <= 0) {
		qFactor = 1;
	}
	if (qFactor > 100) {
		qFactor = 100;
	}
	if (qFactor < 50) {
		qFactor = 5000 / qFactor;
	} else {
		qFactor = 200 - (qFactor * 2);
	}
	int totalLength = getSegmentLength() - 2;
	int ofs = 4;
	while (totalLength > 64) {
//		int tq = reference[ofs] & 0xFF;
		int pq = (reference[ofs] & 0xFF) >> 4;
		if (pq == 0) {
			for (int i = ofs + 1; i <= ofs + 64; i++) {
				int temp = ((reference[i] & 0xFF) * qFactor + 50) / 100;
				if (temp <= 0) temp = 1;
				if (temp > 255) temp = 255;
				reference[i] = (byte)temp;
			}
			ofs += 65;
			totalLength -= 65;
		} else {
			for (int i = ofs + 1; i <= ofs + 128; i += 2) {
				int temp = (((reference[i] & 0xFF) * 256 + (reference[i + 1] & 0xFF)) * qFactor + 50) / 100;
				if (temp <= 0) temp = 1;
				if (temp > 32767) temp = 32767;
				reference[i] = (byte)(temp >> 8);
				reference[i + 1] = (byte)(temp & 0xFF);
			}
			ofs += 129;
			totalLength -= 129;
		}
	}
}

@Override
public int signature() {
	return JPEGFileFormat.DQT;
}
}