1 files changed, 0 insertions, 172 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngLzBlockReader.java b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngLzBlockReader.java
deleted file mode 100755
index d05db3742d..0000000000
--- a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngLzBlockReader.java
+++ /dev/null
@@ -1,172 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2000, 2004 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;
-
-import java.io.*;
-
-public class PngLzBlockReader {
-	boolean isLastBlock;
-	byte compressionType;
-	int uncompressedBytesRemaining;
-	PngDecodingDataStream stream;
-	PngHuffmanTables huffmanTables;
-	
-	byte[] window;
-	int windowIndex;
-	int copyIndex;
-	int copyBytesRemaining;
-	
-	static final int UNCOMPRESSED = 0;
-	static final int COMPRESSED_FIXED = 1;
-	static final int COMPRESSED_DYNAMIC = 2;
-
-	static final int END_OF_COMPRESSED_BLOCK = 256;
-	static final int FIRST_LENGTH_CODE = 257;
-	static final int LAST_LENGTH_CODE = 285;
-	static final int FIRST_DISTANCE_CODE = 1;
-	static final int LAST_DISTANCE_CODE = 29;
-	static final int FIRST_CODE_LENGTH_CODE = 4;
-	static final int LAST_CODE_LENGTH_CODE = 19;
-
-	static final int[] lengthBases = {
-		3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 
-		31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258
-	} ;	
-	static final int[] extraLengthBits = {
-		0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 
-		3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0,
-	};
-	static final int[] distanceBases = {
-		1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129,
-		193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097,
-		6145, 8193, 12289, 16385, 24577,
-	};
-	static final int[] extraDistanceBits = {
-		0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7,  7,
-		8,  8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13,
-	};	
-
-
-PngLzBlockReader(PngDecodingDataStream stream) {
-	this.stream = stream;
-	isLastBlock = false;
-}
-
-void setWindowSize(int windowSize) {
-	window = new byte[windowSize];
-}	
-
-void readNextBlockHeader() throws IOException {
-	isLastBlock = stream.getNextIdatBit() != 0;
-	compressionType = (byte)(stream.getNextIdatBits(2) & 0xFF);
-	if (compressionType > 2) stream.error();	
-	
-	if (compressionType == UNCOMPRESSED) {
-		byte b1 = stream.getNextIdatByte();
-		byte b2 = stream.getNextIdatByte();
-		byte b3 = stream.getNextIdatByte();
-		byte b4 = stream.getNextIdatByte();
-		if (b1 != ~b3 || b2 != ~b4) stream.error();
-		uncompressedBytesRemaining = (b1 & 0xFF) | ((b2 & 0xFF) << 8);
-	} else if (compressionType == COMPRESSED_DYNAMIC) {
-		huffmanTables = PngHuffmanTables.getDynamicTables(stream);
-	} else {
-		huffmanTables = PngHuffmanTables.getFixedTables();
-	}
-}
-
-byte getNextByte() throws IOException {
-	if (compressionType == UNCOMPRESSED) {
-		if (uncompressedBytesRemaining == 0) {
-			readNextBlockHeader();
-			return getNextByte();
-		}
-		uncompressedBytesRemaining--;
-		return stream.getNextIdatByte();
-	} else {
-		byte value = getNextCompressedByte();
-		if (value == END_OF_COMPRESSED_BLOCK) {
-			if (isLastBlock) stream.error();
-			readNextBlockHeader();
-			return getNextByte();
-		} else {
-			return value;
-		}
-	}
-}
-
-private void assertBlockAtEnd() throws IOException {
-	if (compressionType == UNCOMPRESSED) {
-		if (uncompressedBytesRemaining > 0) stream.error();
-	} else if (copyBytesRemaining > 0 ||
-		(huffmanTables.getNextLiteralValue(stream) != END_OF_COMPRESSED_BLOCK)) 
-	{
-		stream.error();		
-	}
-}
-void assertCompressedDataAtEnd() throws IOException {
-	assertBlockAtEnd();		
-	while (!isLastBlock) {
-		readNextBlockHeader();
-		assertBlockAtEnd();
-	}	
-}
-
-private byte getNextCompressedByte() throws IOException {
-	if (copyBytesRemaining > 0) {
-		byte value = window[copyIndex];
-		window[windowIndex] = value;
-		copyBytesRemaining--;
-		
-		copyIndex++;
-		windowIndex++;		
-		if (copyIndex == window.length) copyIndex = 0;
-		if (windowIndex == window.length) windowIndex = 0;
-
-		return value;		
-	}
-	
-	int value = huffmanTables.getNextLiteralValue(stream);
-	if (value < END_OF_COMPRESSED_BLOCK) {
-		window[windowIndex] = (byte) (value & 0xFF);
-		windowIndex++;
-		if (windowIndex >= window.length) windowIndex = 0;
-		return (byte) (value & 0xFF);		
-	} else if (value == END_OF_COMPRESSED_BLOCK) {
-		readNextBlockHeader();
-		return getNextByte();
-	} else if (value <= LAST_LENGTH_CODE) {
-		int extraBits = extraLengthBits[value - FIRST_LENGTH_CODE];
-		int length = lengthBases[value - FIRST_LENGTH_CODE];
-		if (extraBits > 0) {
-			length += stream.getNextIdatBits(extraBits);
-		}
-		
-		value = huffmanTables.getNextDistanceValue(stream);
-		if (value > LAST_DISTANCE_CODE) stream.error();
-		extraBits = extraDistanceBits[value];
-		int distance = distanceBases[value];
-		if (extraBits > 0) {
-			distance += stream.getNextIdatBits(extraBits);
-		}
-		
-		copyIndex = windowIndex - distance;
-		if (copyIndex < 0) copyIndex += window.length;
-
-		copyBytesRemaining = length;
-		return getNextCompressedByte();
-	} else {
-		stream.error();
-		return 0;
-	}
-}
-	
-}