com.github.jaiimageio.impl.plugins.gif.GIFWritableStreamMetadata Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jai-imageio-core Show documentation
Show all versions of jai-imageio-core Show documentation
Java Advanced Imaging Image I/O Tools API core, but without the classes
involved with javax.media.jai dependencies, JPEG2000 or
codecLibJIIO, meaning that this library can be distributed under the
modified BSD license and should be GPL compatible.
The newest version!
/*
* $RCSfile: GIFWritableStreamMetadata.java,v $
*
*
* Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for
* use in the design, construction, operation or maintenance of any
* nuclear facility.
*
* $Revision: 1.2 $
* $Date: 2006/03/24 22:30:11 $
* $State: Exp $
*/
package com.github.jaiimageio.impl.plugins.gif;
/*
* The source for this class was copied verbatim from the source for
* package com.sun.imageio.plugins.gif.GIFImageMetadata and then modified
* to make the class read-write capable.
*/
import javax.imageio.metadata.IIOInvalidTreeException;
import javax.imageio.metadata.IIOMetadataFormatImpl;
import org.w3c.dom.Node;
class GIFWritableStreamMetadata extends GIFStreamMetadata {
// package scope
static final String
NATIVE_FORMAT_NAME = "javax_imageio_gif_stream_1.0";
public GIFWritableStreamMetadata() {
super(true,
NATIVE_FORMAT_NAME,
"com.github.jaiimageio.impl.plugins.gif.GIFStreamMetadataFormat",
null, null);
// initialize metadata fields by default values
reset();
}
public boolean isReadOnly() {
return false;
}
public void mergeTree(String formatName, Node root)
throws IIOInvalidTreeException {
if (formatName.equals(nativeMetadataFormatName)) {
if (root == null) {
throw new IllegalArgumentException("root == null!");
}
mergeNativeTree(root);
} else if (formatName.equals
(IIOMetadataFormatImpl.standardMetadataFormatName)) {
if (root == null) {
throw new IllegalArgumentException("root == null!");
}
mergeStandardTree(root);
} else {
throw new IllegalArgumentException("Not a recognized format!");
}
}
public void reset() {
version = null;
logicalScreenWidth = UNDEFINED_INTEGER_VALUE;
logicalScreenHeight = UNDEFINED_INTEGER_VALUE;
colorResolution = UNDEFINED_INTEGER_VALUE;
pixelAspectRatio = 0;
backgroundColorIndex = 0;
sortFlag = false;
globalColorTable = null;
}
protected void mergeNativeTree(Node root) throws IIOInvalidTreeException {
Node node = root;
if (!node.getNodeName().equals(nativeMetadataFormatName)) {
fatal(node, "Root must be " + nativeMetadataFormatName);
}
node = node.getFirstChild();
while (node != null) {
String name = node.getNodeName();
if (name.equals("Version")) {
version = getStringAttribute(node, "value", null,
true, versionStrings);
} else if (name.equals("LogicalScreenDescriptor")) {
/* NB: At the moment we use empty strings to support undefined
* integer values in tree representation.
* We need to add better support for undefined/default values
* later.
*/
logicalScreenWidth = getIntAttribute(node,
"logicalScreenWidth",
UNDEFINED_INTEGER_VALUE,
true,
true, 1, 65535);
logicalScreenHeight = getIntAttribute(node,
"logicalScreenHeight",
UNDEFINED_INTEGER_VALUE,
true,
true, 1, 65535);
colorResolution = getIntAttribute(node,
"colorResolution",
UNDEFINED_INTEGER_VALUE,
true,
true, 1, 8);
pixelAspectRatio = getIntAttribute(node,
"pixelAspectRatio",
0, true,
true, 0, 255);
} else if (name.equals("GlobalColorTable")) {
int sizeOfGlobalColorTable =
getIntAttribute(node, "sizeOfGlobalColorTable",
true, 2, 256);
if (sizeOfGlobalColorTable != 2 &&
sizeOfGlobalColorTable != 4 &&
sizeOfGlobalColorTable != 8 &&
sizeOfGlobalColorTable != 16 &&
sizeOfGlobalColorTable != 32 &&
sizeOfGlobalColorTable != 64 &&
sizeOfGlobalColorTable != 128 &&
sizeOfGlobalColorTable != 256) {
fatal(node,
"Bad value for GlobalColorTable attribute sizeOfGlobalColorTable!");
}
backgroundColorIndex = getIntAttribute(node,
"backgroundColorIndex",
0, true,
true, 0, 255);
sortFlag = getBooleanAttribute(node, "sortFlag", false, true);
globalColorTable = getColorTable(node, "ColorTableEntry",
true, sizeOfGlobalColorTable);
} else {
fatal(node, "Unknown child of root node!");
}
node = node.getNextSibling();
}
}
protected void mergeStandardTree(Node root)
throws IIOInvalidTreeException {
Node node = root;
if (!node.getNodeName()
.equals(IIOMetadataFormatImpl.standardMetadataFormatName)) {
fatal(node, "Root must be " +
IIOMetadataFormatImpl.standardMetadataFormatName);
}
node = node.getFirstChild();
while (node != null) {
String name = node.getNodeName();
if (name.equals("Chroma")) {
Node childNode = node.getFirstChild();
while(childNode != null) {
String childName = childNode.getNodeName();
if (childName.equals("Palette")) {
globalColorTable = getColorTable(childNode,
"PaletteEntry",
false, -1);
} else if (childName.equals("BackgroundIndex")) {
backgroundColorIndex = getIntAttribute(childNode,
"value",
-1, true,
true, 0, 255);
}
childNode = childNode.getNextSibling();
}
} else if (name.equals("Data")) {
Node childNode = node.getFirstChild();
while(childNode != null) {
String childName = childNode.getNodeName();
if (childName.equals("BitsPerSample")) {
colorResolution = getIntAttribute(childNode,
"value",
-1, true,
true, 1, 8);
break;
}
childNode = childNode.getNextSibling();
}
} else if (name.equals("Dimension")) {
Node childNode = node.getFirstChild();
while(childNode != null) {
String childName = childNode.getNodeName();
if (childName.equals("PixelAspectRatio")) {
float aspectRatio = getFloatAttribute(childNode,
"value");
if (aspectRatio == 1.0F) {
pixelAspectRatio = 0;
} else {
int ratio = (int)(aspectRatio*64.0F - 15.0F);
pixelAspectRatio =
Math.max(Math.min(ratio, 255), 0);
}
} else if (childName.equals("HorizontalScreenSize")) {
logicalScreenWidth = getIntAttribute(childNode,
"value",
-1, true,
true, 1, 65535);
} else if (childName.equals("VerticalScreenSize")) {
logicalScreenHeight = getIntAttribute(childNode,
"value",
-1, true,
true, 1, 65535);
}
childNode = childNode.getNextSibling();
}
} else if (name.equals("Document")) {
Node childNode = node.getFirstChild();
while(childNode != null) {
String childName = childNode.getNodeName();
if (childName.equals("FormatVersion")) {
String formatVersion =
getStringAttribute(childNode, "value", null,
true, null);
for (int i = 0; i < versionStrings.length; i++) {
if (formatVersion.equals(versionStrings[i])) {
version = formatVersion;
break;
}
}
break;
}
childNode = childNode.getNextSibling();
}
}
node = node.getNextSibling();
}
}
public void setFromTree(String formatName, Node root)
throws IIOInvalidTreeException
{
reset();
mergeTree(formatName, root);
}
}