| /* |
| * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.imageio.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.ImageTypeSpecifier; |
| import javax.imageio.metadata.IIOInvalidTreeException; |
| import javax.imageio.metadata.IIOMetadata; |
| import javax.imageio.metadata.IIOMetadataNode; |
| import javax.imageio.metadata.IIOMetadataFormat; |
| 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.sun.imageio.plugins.gif.GIFStreamMetadataFormat", // XXX J2SE |
| 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); |
| } |
| } |
