--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/internal/image/JPEGQuantizationTable.d	Sun Jan 06 22:54:14 2008 +0100
@@ -0,0 +1,156 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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
+ *******************************************************************************/
+module dwt.internal.image.JPEGQuantizationTable;
+
+import dwt.internal.image.LEDataInputStream;
+import dwt.internal.image.JPEGVariableSizeSegment;
+import dwt.internal.image.JPEGFileFormat;
+
+final class JPEGQuantizationTable : JPEGVariableSizeSegment {
+	public static byte[] DefaultLuminanceQTable = [
+		cast(byte)255, cast(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 = [
+		cast(byte)255, cast(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 this(byte[] reference) {
+	super(reference);
+}
+
+public this(LEDataInputStream byteStream) {
+	super(byteStream);
+}
+
+public static JPEGQuantizationTable defaultChrominanceTable() {
+	return new JPEGQuantizationTable(DefaultChrominanceQTable.dup);
+}
+
+public static JPEGQuantizationTable defaultLuminanceTable() {
+	return new JPEGQuantizationTable(DefaultLuminanceQTable.dup);
+}
+
+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) {
+			keys.length = keys.length + 4;
+		}
+		keys[keysIndex] = tq;
+		keysIndex++;
+	}
+	return keys[ 0 .. keysIndex ].dup;
+}
+
+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) {
+            values.length = values.length + 4;
+		}
+		values[valuesIndex] = qk;
+		valuesIndex++;
+	}
+	return values[ 0 .. valuesIndex ].dup;
+}
+
+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] = cast(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] = cast(byte)(temp >> 8);
+				reference[i + 1] = cast(byte)(temp & 0xFF);
+			}
+			ofs += 129;
+			totalLength -= 129;
+		}
+	}
+}
+
+public int signature() {
+	return JPEGFileFormat.DQT;
+}
+}