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| 1 | /* | ||
| 2 | * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package com.sun.imageio.plugins.gif; | ||
| 27 | |||
| 28 | /* | ||
| 29 | * The source for this class was copied verbatim from the source for | ||
| 30 | * package com.sun.imageio.plugins.gif.GIFImageMetadata and then modified | ||
| 31 | * to make the class read-write capable. | ||
| 32 | */ | ||
| 33 | |||
| 34 | import javax.imageio.ImageTypeSpecifier; | ||
| 35 | import javax.imageio.metadata.IIOInvalidTreeException; | ||
| 36 | import javax.imageio.metadata.IIOMetadata; | ||
| 37 | import javax.imageio.metadata.IIOMetadataNode; | ||
| 38 | import javax.imageio.metadata.IIOMetadataFormat; | ||
| 39 | import javax.imageio.metadata.IIOMetadataFormatImpl; | ||
| 40 | import org.w3c.dom.Node; | ||
| 41 | |||
| 42 | class GIFWritableStreamMetadata extends GIFStreamMetadata { | ||
| 43 | |||
| 44 | // package scope | ||
| 45 | static final String | ||
| 46 | NATIVE_FORMAT_NAME = "javax_imageio_gif_stream_1.0"; | ||
| 47 | |||
| 48 | public GIFWritableStreamMetadata() { | ||
| 49 | super(true, | ||
| 50 | NATIVE_FORMAT_NAME, | ||
| 51 | "com.sun.imageio.plugins.gif.GIFStreamMetadataFormat", // XXX J2SE | ||
| 52 | null, null); | ||
| 53 | |||
| 54 | // initialize metadata fields by default values | ||
| 55 | reset(); | ||
| 56 | } | ||
| 57 | |||
| 58 | public boolean isReadOnly() { | ||
| 59 | return false; | ||
| 60 | } | ||
| 61 | |||
| 62 | public void mergeTree(String formatName, Node root) | ||
| 63 | throws IIOInvalidTreeException { | ||
| 64 | if (formatName.equals(nativeMetadataFormatName)) { | ||
| 65 | if (root == null) { | ||
| 66 | throw new IllegalArgumentException("root == null!"); | ||
| 67 | } | ||
| 68 | mergeNativeTree(root); | ||
| 69 | } else if (formatName.equals | ||
| 70 | (IIOMetadataFormatImpl.standardMetadataFormatName)) { | ||
| 71 | if (root == null) { | ||
| 72 | throw new IllegalArgumentException("root == null!"); | ||
| 73 | } | ||
| 74 | mergeStandardTree(root); | ||
| 75 | } else { | ||
| 76 | throw new IllegalArgumentException("Not a recognized format!"); | ||
| 77 | } | ||
| 78 | } | ||
| 79 | |||
| 80 | public void reset() { | ||
| 81 | version = null; | ||
| 82 | |||
| 83 | logicalScreenWidth = UNDEFINED_INTEGER_VALUE; | ||
| 84 | logicalScreenHeight = UNDEFINED_INTEGER_VALUE; | ||
| 85 | colorResolution = UNDEFINED_INTEGER_VALUE; | ||
| 86 | pixelAspectRatio = 0; | ||
| 87 | |||
| 88 | backgroundColorIndex = 0; | ||
| 89 | sortFlag = false; | ||
| 90 | globalColorTable = null; | ||
| 91 | } | ||
| 92 | |||
| 93 | protected void mergeNativeTree(Node root) throws IIOInvalidTreeException { | ||
| 94 | Node node = root; | ||
| 95 | if (!node.getNodeName().equals(nativeMetadataFormatName)) { | ||
| 96 | fatal(node, "Root must be " + nativeMetadataFormatName); | ||
| 97 | } | ||
| 98 | |||
| 99 | node = node.getFirstChild(); | ||
| 100 | while (node != null) { | ||
| 101 | String name = node.getNodeName(); | ||
| 102 | |||
| 103 | if (name.equals("Version")) { | ||
| 104 | version = getStringAttribute(node, "value", null, | ||
| 105 | true, versionStrings); | ||
| 106 | } else if (name.equals("LogicalScreenDescriptor")) { | ||
| 107 | /* NB: At the moment we use empty strings to support undefined | ||
| 108 | * integer values in tree representation. | ||
| 109 | * We need to add better support for undefined/default values | ||
| 110 | * later. | ||
| 111 | */ | ||
| 112 | logicalScreenWidth = getIntAttribute(node, | ||
| 113 | "logicalScreenWidth", | ||
| 114 | UNDEFINED_INTEGER_VALUE, | ||
| 115 | true, | ||
| 116 | true, 1, 65535); | ||
| 117 | |||
| 118 | logicalScreenHeight = getIntAttribute(node, | ||
| 119 | "logicalScreenHeight", | ||
| 120 | UNDEFINED_INTEGER_VALUE, | ||
| 121 | true, | ||
| 122 | true, 1, 65535); | ||
| 123 | |||
| 124 | colorResolution = getIntAttribute(node, | ||
| 125 | "colorResolution", | ||
| 126 | UNDEFINED_INTEGER_VALUE, | ||
| 127 | true, | ||
| 128 | true, 1, 8); | ||
| 129 | |||
| 130 | pixelAspectRatio = getIntAttribute(node, | ||
| 131 | "pixelAspectRatio", | ||
| 132 | 0, true, | ||
| 133 | true, 0, 255); | ||
| 134 | } else if (name.equals("GlobalColorTable")) { | ||
| 135 | int sizeOfGlobalColorTable = | ||
| 136 | getIntAttribute(node, "sizeOfGlobalColorTable", | ||
| 137 | true, 2, 256); | ||
| 138 | if (sizeOfGlobalColorTable != 2 && | ||
| 139 | sizeOfGlobalColorTable != 4 && | ||
| 140 | sizeOfGlobalColorTable != 8 && | ||
| 141 | sizeOfGlobalColorTable != 16 && | ||
| 142 | sizeOfGlobalColorTable != 32 && | ||
| 143 | sizeOfGlobalColorTable != 64 && | ||
| 144 | sizeOfGlobalColorTable != 128 && | ||
| 145 | sizeOfGlobalColorTable != 256) { | ||
| 146 | fatal(node, | ||
| 147 | "Bad value for GlobalColorTable attribute sizeOfGlobalColorTable!"); | ||
| 148 | } | ||
| 149 | |||
| 150 | backgroundColorIndex = getIntAttribute(node, | ||
| 151 | "backgroundColorIndex", | ||
| 152 | 0, true, | ||
| 153 | true, 0, 255); | ||
| 154 | |||
| 155 | sortFlag = getBooleanAttribute(node, "sortFlag", false, true); | ||
| 156 | |||
| 157 | globalColorTable = getColorTable(node, "ColorTableEntry", | ||
| 158 | true, sizeOfGlobalColorTable); | ||
| 159 | } else { | ||
| 160 | fatal(node, "Unknown child of root node!"); | ||
| 161 | } | ||
| 162 | |||
| 163 | node = node.getNextSibling(); | ||
| 164 | } | ||
| 165 | } | ||
| 166 | |||
| 167 | protected void mergeStandardTree(Node root) | ||
| 168 | throws IIOInvalidTreeException { | ||
| 169 | Node node = root; | ||
| 170 | if (!node.getNodeName() | ||
| 171 | .equals(IIOMetadataFormatImpl.standardMetadataFormatName)) { | ||
| 172 | fatal(node, "Root must be " + | ||
| 173 | IIOMetadataFormatImpl.standardMetadataFormatName); | ||
| 174 | } | ||
| 175 | |||
| 176 | node = node.getFirstChild(); | ||
| 177 | while (node != null) { | ||
| 178 | String name = node.getNodeName(); | ||
| 179 | |||
| 180 | if (name.equals("Chroma")) { | ||
| 181 | Node childNode = node.getFirstChild(); | ||
| 182 | while(childNode != null) { | ||
| 183 | String childName = childNode.getNodeName(); | ||
| 184 | if (childName.equals("Palette")) { | ||
| 185 | globalColorTable = getColorTable(childNode, | ||
| 186 | "PaletteEntry", | ||
| 187 | false, -1); | ||
| 188 | |||
| 189 | } else if (childName.equals("BackgroundIndex")) { | ||
| 190 | backgroundColorIndex = getIntAttribute(childNode, | ||
| 191 | "value", | ||
| 192 | -1, true, | ||
| 193 | true, 0, 255); | ||
| 194 | } | ||
| 195 | childNode = childNode.getNextSibling(); | ||
| 196 | } | ||
| 197 | } else if (name.equals("Data")) { | ||
| 198 | Node childNode = node.getFirstChild(); | ||
| 199 | while(childNode != null) { | ||
| 200 | String childName = childNode.getNodeName(); | ||
| 201 | if (childName.equals("BitsPerSample")) { | ||
| 202 | colorResolution = getIntAttribute(childNode, | ||
| 203 | "value", | ||
| 204 | -1, true, | ||
| 205 | true, 1, 8); | ||
| 206 | break; | ||
| 207 | } | ||
| 208 | childNode = childNode.getNextSibling(); | ||
| 209 | } | ||
| 210 | } else if (name.equals("Dimension")) { | ||
| 211 | Node childNode = node.getFirstChild(); | ||
| 212 | while(childNode != null) { | ||
| 213 | String childName = childNode.getNodeName(); | ||
| 214 | if (childName.equals("PixelAspectRatio")) { | ||
| 215 | float aspectRatio = getFloatAttribute(childNode, | ||
| 216 | "value"); | ||
| 217 | if (aspectRatio == 1.0F) { | ||
| 218 | pixelAspectRatio = 0; | ||
| 219 | } else { | ||
| 220 | int ratio = (int)(aspectRatio*64.0F - 15.0F); | ||
| 221 | pixelAspectRatio = | ||
| 222 | Math.max(Math.min(ratio, 255), 0); | ||
| 223 | } | ||
| 224 | } else if (childName.equals("HorizontalScreenSize")) { | ||
| 225 | logicalScreenWidth = getIntAttribute(childNode, | ||
| 226 | "value", | ||
| 227 | -1, true, | ||
| 228 | true, 1, 65535); | ||
| 229 | } else if (childName.equals("VerticalScreenSize")) { | ||
| 230 | logicalScreenHeight = getIntAttribute(childNode, | ||
| 231 | "value", | ||
| 232 | -1, true, | ||
| 233 | true, 1, 65535); | ||
| 234 | } | ||
| 235 | childNode = childNode.getNextSibling(); | ||
| 236 | } | ||
| 237 | } else if (name.equals("Document")) { | ||
| 238 | Node childNode = node.getFirstChild(); | ||
| 239 | while(childNode != null) { | ||
| 240 | String childName = childNode.getNodeName(); | ||
| 241 | if (childName.equals("FormatVersion")) { | ||
| 242 | String formatVersion = | ||
| 243 | getStringAttribute(childNode, "value", null, | ||
| 244 | true, null); | ||
| 245 | for (int i = 0; i < versionStrings.length; i++) { | ||
| 246 | if (formatVersion.equals(versionStrings[i])) { | ||
| 247 | version = formatVersion; | ||
| 248 | break; | ||
| 249 | } | ||
| 250 | } | ||
| 251 | break; | ||
| 252 | } | ||
| 253 | childNode = childNode.getNextSibling(); | ||
| 254 | } | ||
| 255 | } | ||
| 256 | |||
| 257 | node = node.getNextSibling(); | ||
| 258 | } | ||
| 259 | } | ||
| 260 | |||
| 261 | public void setFromTree(String formatName, Node root) | ||
| 262 | throws IIOInvalidTreeException | ||
| 263 | { | ||
| 264 | reset(); | ||
| 265 | mergeTree(formatName, root); | ||
| 266 | } | ||
| 267 | } | ||