1 files changed, 371 insertions, 371 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngIhdrChunk.java b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngIhdrChunk.java
index 780e6051e5..4c2a60182e 100755
--- a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngIhdrChunk.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngIhdrChunk.java
@@ -1,375 +1,375 @@
-package org.eclipse.swt.internal.image;
-
-/*
+package org.eclipse.swt.internal.image;
+
+/*
  * Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
  * This file is made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v10.html
- */
-
-import org.eclipse.swt.*;
-import org.eclipse.swt.graphics.*;
-import org.eclipse.swt.internal.Compatibility;
-
-class PngIhdrChunk extends PngChunk {
-	static final int EXPECTED_DATA_LENGTH = 13;
-	
-	static final int WIDTH_DATA_OFFSET = DATA_OFFSET + 0;
-	static final int HEIGHT_DATA_OFFSET = DATA_OFFSET + 4;
-	static final int BIT_DEPTH_OFFSET = DATA_OFFSET + 8;
-	static final int COLOR_TYPE_OFFSET = DATA_OFFSET + 9;
-	static final int COMPRESSION_METHOD_OFFSET = DATA_OFFSET + 10;
-	static final int FILTER_METHOD_OFFSET = DATA_OFFSET + 11;
-	static final int INTERLACE_METHOD_OFFSET = DATA_OFFSET + 12;
-	
-	static final int COLOR_TYPE_GRAYSCALE = 0;
-	static final int COLOR_TYPE_RGB = 2;
-	static final int COLOR_TYPE_PALETTE = 3;
-	static final int COLOR_TYPE_GRAYSCALE_WITH_ALPHA = 4;
-	static final int COLOR_TYPE_RGB_WITH_ALPHA = 6;
-	
-	static final int INTERLACE_METHOD_NONE = 0;
-	static final int INTERLACE_METHOD_ADAM7 = 1;
-	
-	static final int FILTER_NONE = 0;
-	static final int FILTER_SUB = 1;
-	static final int FILTER_UP = 2;
-	static final int FILTER_AVERAGE = 3;
-	static final int FILTER_PAETH = 4;
-	
-	static final byte[] ValidBitDepths = {1, 2, 4, 8, 16};
-	static final byte[] ValidColorTypes = {0, 2, 3, 4, 6};
-	
-/**
- * Construct a PNGChunk using the reference bytes
- * given.
- */	
-PngIhdrChunk(byte[] reference) {
-	super(reference);
-}
-
-/**
- * Get the image's width in pixels.
- */
-int getWidth() {
-	return getInt32(WIDTH_DATA_OFFSET);
-}
-
-/**
- * Set the image's width in pixels.
- */
-void setWidth(int value) {
-	setInt32(WIDTH_DATA_OFFSET, value);
-}
-
-/**
- * Get the image's height in pixels.
- */
-int getHeight() {
-	return getInt32(HEIGHT_DATA_OFFSET);
-}
-
-/**
- * Set the image's height in pixels.
- */
-void setHeight(int value) {
-	setInt32(HEIGHT_DATA_OFFSET, value);
-}
-
-/**
- * Get the image's bit depth.
- * This is limited to the values 1, 2, 4, 8, or 16.
- */
-byte getBitDepth() {
-	return reference[BIT_DEPTH_OFFSET];
-}
-
-/**
- * Set the image's bit depth.
- * This is limited to the values 1, 2, 4, 8, or 16.
- */
-void setBitDepth(byte value) {
-	reference[BIT_DEPTH_OFFSET] = value;
-}
-
-/**
- * Get the image's color type.
- * This is limited to the values:
- * 0 - Grayscale image.
- * 2 - RGB triple.
- * 3 - Palette.
- * 4 - Grayscale with Alpha channel.
- * 6 - RGB with Alpha channel.
- */
-byte getColorType() {
-	return reference[COLOR_TYPE_OFFSET];
-}
-
-/**
- * Set the image's color type.
- * This is limited to the values:
- * 0 - Grayscale image.
- * 2 - RGB triple.
- * 3 - Palette.
- * 4 - Grayscale with Alpha channel.
- * 6 - RGB with Alpha channel.
- */
-void setColorType(byte value) {
-	reference[COLOR_TYPE_OFFSET] = value;
-}
-
-/**
- * Get the image's compression method.
- * This value must be 0.
- */
-byte getCompressionMethod() {
-	return reference[COMPRESSION_METHOD_OFFSET];
-}
-
-/**
- * Set the image's compression method.
- * This value must be 0.
- */
-void setCompressionMethod(byte value) {
-	reference[COMPRESSION_METHOD_OFFSET] = value;
-}
-
-/**
- * Get the image's filter method.
- * This value must be 0.
- */
-byte getFilterMethod() {
-	return reference[FILTER_METHOD_OFFSET];
-}
-
-/**
- * Set the image's filter method.
- * This value must be 0.
- */
-void setFilterMethod(byte value) {
-	reference[FILTER_METHOD_OFFSET] = value;
-}
-
-/**
- * Get the image's interlace method.
- * This value is limited to:
- * 0 - No interlacing used.
- * 1 - Adam7 interlacing used.
- */
-byte getInterlaceMethod() {
-	return reference[INTERLACE_METHOD_OFFSET];
-}
-
-/**
- * Set the image's interlace method.
- * This value is limited to:
- * 0 - No interlacing used.
- * 1 - Adam7 interlacing used.
- */
-void setInterlaceMethod(byte value) {
-	reference[INTERLACE_METHOD_OFFSET] = value;
-}
-
-/**
- * Answer whether the chunk is a valid IHDR chunk.
- */
-void validate(PngFileReadState readState, PngIhdrChunk headerChunk) {
-	// An IHDR chunk is invalid if any other chunk has
-	// been read.
-	if (readState.readIHDR 
-		|| readState.readPLTE
-		|| readState.readIDAT
-		|| readState.readIEND) 
-	{
-		SWT.error(SWT.ERROR_INVALID_IMAGE);
-	} else {
-		readState.readIHDR = true;
-	}
-	
-	super.validate(readState, headerChunk);
-	
-	if (getLength() != EXPECTED_DATA_LENGTH) SWT.error(SWT.ERROR_INVALID_IMAGE);
-	if (getCompressionMethod() != 0) SWT.error(SWT.ERROR_INVALID_IMAGE);
-	if (getInterlaceMethod() != INTERLACE_METHOD_NONE &&
-		getInterlaceMethod() != INTERLACE_METHOD_ADAM7) {
-			SWT.error(SWT.ERROR_INVALID_IMAGE);
-	}
-	
-	boolean colorTypeIsValid = false;
-	byte colorType = getColorType();
-	for (int i = 0; i < ValidColorTypes.length; i++) {
-		if (ValidColorTypes[i] == colorType) {
-			colorTypeIsValid = true;
-			break;
-		}
-	}
-	if (!colorTypeIsValid) SWT.error(SWT.ERROR_INVALID_IMAGE);;
-
-	boolean bitDepthIsValid = false;
-	byte bitDepth = getBitDepth();
-	for (int i = 0; i < ValidBitDepths.length; i++) {
-		if (ValidBitDepths[i] == bitDepth) {
-			bitDepthIsValid = true;
-			break;
-		}
-	}
-	if (!bitDepthIsValid) SWT.error(SWT.ERROR_INVALID_IMAGE);
-	
-	if ((colorType == COLOR_TYPE_RGB 
-		|| colorType == COLOR_TYPE_RGB_WITH_ALPHA
-		|| colorType == COLOR_TYPE_GRAYSCALE_WITH_ALPHA)
-		&& bitDepth < 8) 
-	{
-			SWT.error(SWT.ERROR_INVALID_IMAGE);
-	}
-	
-	if (colorType == COLOR_TYPE_PALETTE && bitDepth > 8) {
-		SWT.error(SWT.ERROR_INVALID_IMAGE);
-	}
-}
-
-String getColorTypeString() {
-	switch (getColorType()) {
-		case COLOR_TYPE_GRAYSCALE: 				return "Grayscale";
-		case COLOR_TYPE_RGB: 					return "RGB";		
-		case COLOR_TYPE_PALETTE:				return "Palette";
-		case COLOR_TYPE_GRAYSCALE_WITH_ALPHA:	return "Grayscale with Alpha";
-		case COLOR_TYPE_RGB_WITH_ALPHA:			return "RGB with Alpha";
-		default:								return "Unknown - " + getColorType();
-	}
-}
-
-String getFilterMethodString() {
-	switch (getFilterMethod()) {
-		case FILTER_NONE:		return "None";
-		case FILTER_SUB:		return "Sub";
-		case FILTER_UP:			return "Up";
-		case FILTER_AVERAGE:	return "Average";
-		case FILTER_PAETH:		return "Paeth";
-		default:				return "Unknown";
-	}
-}
-
-String getInterlaceMethodString() {
-	switch (getInterlaceMethod()) {
-		case INTERLACE_METHOD_NONE: 	return "Not Interlaced";
-		case INTERLACE_METHOD_ADAM7:	return "Interlaced - ADAM7";
-		default:				return "Unknown";
-	}
-}
-
-void contributeToString(StringBuffer buffer) {
-	buffer.append("\n\tWidth: ");
-	buffer.append(getWidth());
-	buffer.append("\n\tHeight: ");
-	buffer.append(getHeight());
-	buffer.append("\n\tBit Depth: ");
-	buffer.append(getBitDepth());
-	buffer.append("\n\tColor Type: ");
-	buffer.append(getColorTypeString());
-	buffer.append("\n\tCompression Method: ");
-	buffer.append(getCompressionMethod());
-	buffer.append("\n\tFilter Method: ");
-	buffer.append(getFilterMethodString());
-	buffer.append("\n\tInterlace Method: ");
-	buffer.append(getInterlaceMethodString());
-}
-
-boolean getMustHavePalette() {
-	return getColorType() == COLOR_TYPE_PALETTE;
-}
-
-boolean getCanHavePalette() {
-	int colorType = getColorType();
-	return colorType != COLOR_TYPE_GRAYSCALE && 
-		colorType != COLOR_TYPE_GRAYSCALE_WITH_ALPHA;
-}
-
-/**
- * Answer the pixel size in bits based on the color type
- * and bit depth.
- */
-int getBitsPerPixel() {
-	int bitDepth = getBitDepth();
-	switch (getColorType()) {
-		case COLOR_TYPE_RGB_WITH_ALPHA:
-			return 4 * bitDepth;
-		case COLOR_TYPE_RGB:
-			return 3 * bitDepth;
-		case COLOR_TYPE_GRAYSCALE_WITH_ALPHA:
-			return 2 * bitDepth;
-		case COLOR_TYPE_GRAYSCALE:
-		case COLOR_TYPE_PALETTE:
-			return bitDepth;
-		default:
-			SWT.error(SWT.ERROR_INVALID_IMAGE);
-			return 0;
-	}
-}
-
-/**
- * Answer the pixel size in bits based on the color type
- * and bit depth.
- */
-int getSwtBitsPerPixel() {
-	int bitDepth = getBitDepth();
-	switch (getColorType()) {
-		case COLOR_TYPE_RGB_WITH_ALPHA:
-		case COLOR_TYPE_RGB:
-		case COLOR_TYPE_GRAYSCALE_WITH_ALPHA:
-			return 24;
-		case COLOR_TYPE_GRAYSCALE:
-		case COLOR_TYPE_PALETTE:
-			return Math.min(bitDepth, 8);
-		default:
-			SWT.error(SWT.ERROR_INVALID_IMAGE);
-			return 0;
-	}
-}
-
-int getFilterByteOffset() {
-	if (getBitDepth() < 8) return 1;
-	return getBitsPerPixel() / 8;
-}
-
-boolean usesDirectColor() {
-	switch (getColorType()) {
-		case COLOR_TYPE_GRAYSCALE:
-		case COLOR_TYPE_GRAYSCALE_WITH_ALPHA:
-		case COLOR_TYPE_RGB:
-		case COLOR_TYPE_RGB_WITH_ALPHA:
-			return true;
-		default:
-			return false;
-	}
-}
-
-PaletteData createGrayscalePalette() {
-	int bitDepth = Math.min(getBitDepth(), 8);
-	int max = Compatibility.pow2(bitDepth) - 1;
-	int delta = 255 / max;
-	int gray = 0;
-	RGB[] rgbs = new RGB[max + 1]; 
-	for (int i = 0; i <= max; i++) {
-		rgbs[i] = new RGB(gray, gray, gray);
-		gray += delta;
-	}
-	return new PaletteData(rgbs);
-}
-
-PaletteData getPaletteData() {
-	switch (getColorType()) {
-		case COLOR_TYPE_GRAYSCALE:
-			return createGrayscalePalette();
-		case COLOR_TYPE_GRAYSCALE_WITH_ALPHA:
-		case COLOR_TYPE_RGB:
-		case COLOR_TYPE_RGB_WITH_ALPHA:
-			return new PaletteData(0xFF0000, 0xFF00, 0xFF);
-		default:
-			return null;
-	}	
-}
-
-
-
+ * http://www.eclipse.org/legal/cpl-v10.html
+ */
+
+import org.eclipse.swt.*;
+import org.eclipse.swt.graphics.*;
+import org.eclipse.swt.internal.Compatibility;
+
+class PngIhdrChunk extends PngChunk {
+	static final int EXPECTED_DATA_LENGTH = 13;
+	
+	static final int WIDTH_DATA_OFFSET = DATA_OFFSET + 0;
+	static final int HEIGHT_DATA_OFFSET = DATA_OFFSET + 4;
+	static final int BIT_DEPTH_OFFSET = DATA_OFFSET + 8;
+	static final int COLOR_TYPE_OFFSET = DATA_OFFSET + 9;
+	static final int COMPRESSION_METHOD_OFFSET = DATA_OFFSET + 10;
+	static final int FILTER_METHOD_OFFSET = DATA_OFFSET + 11;
+	static final int INTERLACE_METHOD_OFFSET = DATA_OFFSET + 12;
+	
+	static final int COLOR_TYPE_GRAYSCALE = 0;
+	static final int COLOR_TYPE_RGB = 2;
+	static final int COLOR_TYPE_PALETTE = 3;
+	static final int COLOR_TYPE_GRAYSCALE_WITH_ALPHA = 4;
+	static final int COLOR_TYPE_RGB_WITH_ALPHA = 6;
+	
+	static final int INTERLACE_METHOD_NONE = 0;
+	static final int INTERLACE_METHOD_ADAM7 = 1;
+	
+	static final int FILTER_NONE = 0;
+	static final int FILTER_SUB = 1;
+	static final int FILTER_UP = 2;
+	static final int FILTER_AVERAGE = 3;
+	static final int FILTER_PAETH = 4;
+	
+	static final byte[] ValidBitDepths = {1, 2, 4, 8, 16};
+	static final byte[] ValidColorTypes = {0, 2, 3, 4, 6};
+	
+/**
+ * Construct a PNGChunk using the reference bytes
+ * given.
+ */	
+PngIhdrChunk(byte[] reference) {
+	super(reference);
+}
+
+/**
+ * Get the image's width in pixels.
+ */
+int getWidth() {
+	return getInt32(WIDTH_DATA_OFFSET);
+}
+
+/**
+ * Set the image's width in pixels.
+ */
+void setWidth(int value) {
+	setInt32(WIDTH_DATA_OFFSET, value);
+}
+
+/**
+ * Get the image's height in pixels.
+ */
+int getHeight() {
+	return getInt32(HEIGHT_DATA_OFFSET);
+}
+
+/**
+ * Set the image's height in pixels.
+ */
+void setHeight(int value) {
+	setInt32(HEIGHT_DATA_OFFSET, value);
+}
+
+/**
+ * Get the image's bit depth.
+ * This is limited to the values 1, 2, 4, 8, or 16.
+ */
+byte getBitDepth() {
+	return reference[BIT_DEPTH_OFFSET];
+}
+
+/**
+ * Set the image's bit depth.
+ * This is limited to the values 1, 2, 4, 8, or 16.
+ */
+void setBitDepth(byte value) {
+	reference[BIT_DEPTH_OFFSET] = value;
+}
+
+/**
+ * Get the image's color type.
+ * This is limited to the values:
+ * 0 - Grayscale image.
+ * 2 - RGB triple.
+ * 3 - Palette.
+ * 4 - Grayscale with Alpha channel.
+ * 6 - RGB with Alpha channel.
+ */
+byte getColorType() {
+	return reference[COLOR_TYPE_OFFSET];
+}
+
+/**
+ * Set the image's color type.
+ * This is limited to the values:
+ * 0 - Grayscale image.
+ * 2 - RGB triple.
+ * 3 - Palette.
+ * 4 - Grayscale with Alpha channel.
+ * 6 - RGB with Alpha channel.
+ */
+void setColorType(byte value) {
+	reference[COLOR_TYPE_OFFSET] = value;
+}
+
+/**
+ * Get the image's compression method.
+ * This value must be 0.
+ */
+byte getCompressionMethod() {
+	return reference[COMPRESSION_METHOD_OFFSET];
+}
+
+/**
+ * Set the image's compression method.
+ * This value must be 0.
+ */
+void setCompressionMethod(byte value) {
+	reference[COMPRESSION_METHOD_OFFSET] = value;
+}
+
+/**
+ * Get the image's filter method.
+ * This value must be 0.
+ */
+byte getFilterMethod() {
+	return reference[FILTER_METHOD_OFFSET];
+}
+
+/**
+ * Set the image's filter method.
+ * This value must be 0.
+ */
+void setFilterMethod(byte value) {
+	reference[FILTER_METHOD_OFFSET] = value;
+}
+
+/**
+ * Get the image's interlace method.
+ * This value is limited to:
+ * 0 - No interlacing used.
+ * 1 - Adam7 interlacing used.
+ */
+byte getInterlaceMethod() {
+	return reference[INTERLACE_METHOD_OFFSET];
+}
+
+/**
+ * Set the image's interlace method.
+ * This value is limited to:
+ * 0 - No interlacing used.
+ * 1 - Adam7 interlacing used.
+ */
+void setInterlaceMethod(byte value) {
+	reference[INTERLACE_METHOD_OFFSET] = value;
+}
+
+/**
+ * Answer whether the chunk is a valid IHDR chunk.
+ */
+void validate(PngFileReadState readState, PngIhdrChunk headerChunk) {
+	// An IHDR chunk is invalid if any other chunk has
+	// been read.
+	if (readState.readIHDR 
+		|| readState.readPLTE
+		|| readState.readIDAT
+		|| readState.readIEND) 
+	{
+		SWT.error(SWT.ERROR_INVALID_IMAGE);
+	} else {
+		readState.readIHDR = true;
+	}
+	
+	super.validate(readState, headerChunk);
+	
+	if (getLength() != EXPECTED_DATA_LENGTH) SWT.error(SWT.ERROR_INVALID_IMAGE);
+	if (getCompressionMethod() != 0) SWT.error(SWT.ERROR_INVALID_IMAGE);
+	if (getInterlaceMethod() != INTERLACE_METHOD_NONE &&
+		getInterlaceMethod() != INTERLACE_METHOD_ADAM7) {
+			SWT.error(SWT.ERROR_INVALID_IMAGE);
+	}
+	
+	boolean colorTypeIsValid = false;
+	byte colorType = getColorType();
+	for (int i = 0; i < ValidColorTypes.length; i++) {
+		if (ValidColorTypes[i] == colorType) {
+			colorTypeIsValid = true;
+			break;
+		}
+	}
+	if (!colorTypeIsValid) SWT.error(SWT.ERROR_INVALID_IMAGE);;
+
+	boolean bitDepthIsValid = false;
+	byte bitDepth = getBitDepth();
+	for (int i = 0; i < ValidBitDepths.length; i++) {
+		if (ValidBitDepths[i] == bitDepth) {
+			bitDepthIsValid = true;
+			break;
+		}
+	}
+	if (!bitDepthIsValid) SWT.error(SWT.ERROR_INVALID_IMAGE);
+	
+	if ((colorType == COLOR_TYPE_RGB 
+		|| colorType == COLOR_TYPE_RGB_WITH_ALPHA
+		|| colorType == COLOR_TYPE_GRAYSCALE_WITH_ALPHA)
+		&& bitDepth < 8) 
+	{
+			SWT.error(SWT.ERROR_INVALID_IMAGE);
+	}
+	
+	if (colorType == COLOR_TYPE_PALETTE && bitDepth > 8) {
+		SWT.error(SWT.ERROR_INVALID_IMAGE);
+	}
+}
+
+String getColorTypeString() {
+	switch (getColorType()) {
+		case COLOR_TYPE_GRAYSCALE: 				return "Grayscale";
+		case COLOR_TYPE_RGB: 					return "RGB";		
+		case COLOR_TYPE_PALETTE:				return "Palette";
+		case COLOR_TYPE_GRAYSCALE_WITH_ALPHA:	return "Grayscale with Alpha";
+		case COLOR_TYPE_RGB_WITH_ALPHA:			return "RGB with Alpha";
+		default:								return "Unknown - " + getColorType();
+	}
+}
+
+String getFilterMethodString() {
+	switch (getFilterMethod()) {
+		case FILTER_NONE:		return "None";
+		case FILTER_SUB:		return "Sub";
+		case FILTER_UP:			return "Up";
+		case FILTER_AVERAGE:	return "Average";
+		case FILTER_PAETH:		return "Paeth";
+		default:				return "Unknown";
+	}
+}
+
+String getInterlaceMethodString() {
+	switch (getInterlaceMethod()) {
+		case INTERLACE_METHOD_NONE: 	return "Not Interlaced";
+		case INTERLACE_METHOD_ADAM7:	return "Interlaced - ADAM7";
+		default:				return "Unknown";
+	}
+}
+
+void contributeToString(StringBuffer buffer) {
+	buffer.append("\n\tWidth: ");
+	buffer.append(getWidth());
+	buffer.append("\n\tHeight: ");
+	buffer.append(getHeight());
+	buffer.append("\n\tBit Depth: ");
+	buffer.append(getBitDepth());
+	buffer.append("\n\tColor Type: ");
+	buffer.append(getColorTypeString());
+	buffer.append("\n\tCompression Method: ");
+	buffer.append(getCompressionMethod());
+	buffer.append("\n\tFilter Method: ");
+	buffer.append(getFilterMethodString());
+	buffer.append("\n\tInterlace Method: ");
+	buffer.append(getInterlaceMethodString());
+}
+
+boolean getMustHavePalette() {
+	return getColorType() == COLOR_TYPE_PALETTE;
+}
+
+boolean getCanHavePalette() {
+	int colorType = getColorType();
+	return colorType != COLOR_TYPE_GRAYSCALE && 
+		colorType != COLOR_TYPE_GRAYSCALE_WITH_ALPHA;
+}
+
+/**
+ * Answer the pixel size in bits based on the color type
+ * and bit depth.
+ */
+int getBitsPerPixel() {
+	int bitDepth = getBitDepth();
+	switch (getColorType()) {
+		case COLOR_TYPE_RGB_WITH_ALPHA:
+			return 4 * bitDepth;
+		case COLOR_TYPE_RGB:
+			return 3 * bitDepth;
+		case COLOR_TYPE_GRAYSCALE_WITH_ALPHA:
+			return 2 * bitDepth;
+		case COLOR_TYPE_GRAYSCALE:
+		case COLOR_TYPE_PALETTE:
+			return bitDepth;
+		default:
+			SWT.error(SWT.ERROR_INVALID_IMAGE);
+			return 0;
+	}
+}
+
+/**
+ * Answer the pixel size in bits based on the color type
+ * and bit depth.
+ */
+int getSwtBitsPerPixel() {
+	int bitDepth = getBitDepth();
+	switch (getColorType()) {
+		case COLOR_TYPE_RGB_WITH_ALPHA:
+		case COLOR_TYPE_RGB:
+		case COLOR_TYPE_GRAYSCALE_WITH_ALPHA:
+			return 24;
+		case COLOR_TYPE_GRAYSCALE:
+		case COLOR_TYPE_PALETTE:
+			return Math.min(bitDepth, 8);
+		default:
+			SWT.error(SWT.ERROR_INVALID_IMAGE);
+			return 0;
+	}
+}
+
+int getFilterByteOffset() {
+	if (getBitDepth() < 8) return 1;
+	return getBitsPerPixel() / 8;
+}
+
+boolean usesDirectColor() {
+	switch (getColorType()) {
+		case COLOR_TYPE_GRAYSCALE:
+		case COLOR_TYPE_GRAYSCALE_WITH_ALPHA:
+		case COLOR_TYPE_RGB:
+		case COLOR_TYPE_RGB_WITH_ALPHA:
+			return true;
+		default:
+			return false;
+	}
+}
+
+PaletteData createGrayscalePalette() {
+	int bitDepth = Math.min(getBitDepth(), 8);
+	int max = Compatibility.pow2(bitDepth) - 1;
+	int delta = 255 / max;
+	int gray = 0;
+	RGB[] rgbs = new RGB[max + 1]; 
+	for (int i = 0; i <= max; i++) {
+		rgbs[i] = new RGB(gray, gray, gray);
+		gray += delta;
+	}
+	return new PaletteData(rgbs);
+}
+
+PaletteData getPaletteData() {
+	switch (getColorType()) {
+		case COLOR_TYPE_GRAYSCALE:
+			return createGrayscalePalette();
+		case COLOR_TYPE_GRAYSCALE_WITH_ALPHA:
+		case COLOR_TYPE_RGB:
+		case COLOR_TYPE_RGB_WITH_ALPHA:
+			return new PaletteData(0xFF0000, 0xFF00, 0xFF);
+		default:
+			return null;
+	}	
+}
+
+
+
 }