| author | ohair |
| Wed, 26 May 2010 20:28:04 -0700 | |
| changeset 5551 | 327690766109 |
| parent 5506 | 202f599c92aa |
| permissions | -rw-r--r-- |
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> |
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<html> |
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<head> |
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<!-- |
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Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved. |
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DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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This code is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License version 2 only, as |
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published by the Free Software Foundation. Oracle designates this |
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particular file as subject to the "Classpath" exception as provided |
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by Oracle in the LICENSE file that accompanied this code. |
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This code is distributed in the hope that it will be useful, but WITHOUT |
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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version 2 for more details (a copy is included in the LICENSE file that |
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accompanied this code). |
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You should have received a copy of the GNU General Public License version |
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2 along with this work; if not, write to the Free Software Foundation, |
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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327690766109
6956202: Fix a few missed rebranding issues, please contact lines etc.
ohair
parents:
5506
diff
changeset
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Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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327690766109
6956202: Fix a few missed rebranding issues, please contact lines etc.
ohair
parents:
5506
diff
changeset
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or visit www.oracle.com if you need additional information or have any |
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327690766109
6956202: Fix a few missed rebranding issues, please contact lines etc.
ohair
parents:
5506
diff
changeset
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questions. |
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--> |
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</head> |
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<body bgcolor="white"> |
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A package of the Java Image I/O API dealing with reading and writing |
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metadata. |
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<p> |
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When reading an image, its per-stream and per-image metadata is made |
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available as an <code>IIOMetadata</code> object. The internals of |
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this object are specific to the plug-in that created it. Its contents |
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may be accessed in the form of an XML <code>Document</code>, which is |
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implemented as a tree of <code>IIOMetadataNode</code> objects. |
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<p> |
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When writing an image, its metadata may be set by defining or |
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modifying an <code>IIOMetadata</code> object. Such an object may be |
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obtained from an <code>ImageWriter</code> or |
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<code>ImageTranscoder</code> (from the |
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<code>javax.imageio</code> package). Once such an object has |
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been obtained, its contents may be set of modified via a |
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<code>Document</code> consisting of <code>IIOMetadataNode</code>s. |
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The document format may optionally be described using an |
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<code>IIOMetadataFormat</code> object. |
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<p> |
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The format of the metadata contained in the XML <code>Document</code> |
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is identified by a string which appears as the root node of the tree |
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of <code>IIOMetadataNode</code> objects. This string contains a version |
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number, e.g. "javax_imageio_jpeg_image_1.0". Readers and writers may |
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support multiple versions of the same basic format and the Image I/O |
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API has methods that allow specifying which version to use by passing |
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the string to the method/constructor used to obtain an <code>IIOMetadata</code> |
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object. In some cases, a more recent version may not be strictly |
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compatible with a program written expecting an older version (for |
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an example, see the Native Metadata Format section of the JPEG Metadata |
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Usage Notes below). |
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<p> |
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Plug-ins may choose to support a <A |
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HREF="doc-files/standard_metadata.html">standard (plug-in neutral) |
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format</A>. This format does not provide lossless encoding of |
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metadata, but allows a portion of the metadata to be accessed in a |
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generic manner. |
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<p> |
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Each of the standard plug-ins supports a so-called "native" metadata |
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format, which encodes its metadata losslessly: |
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<ul> |
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<li> |
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<A HREF="doc-files/gif_metadata.html"> |
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GIF metadata |
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</A> |
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<li> |
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<A HREF="doc-files/jpeg_metadata.html"> |
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JPEG metadata |
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</A> |
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<li> |
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<A HREF="doc-files/png_metadata.html"> |
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PNG metadata |
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</A> |
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<li> |
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<A HREF="doc-files/bmp_metadata.html"> |
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BMP metadata |
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</A> |
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<li> |
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<A HREF="doc-files/wbmp_metadata.html"> |
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WBMP metadata |
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</A> |
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</ul> |
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@since 1.4 |
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</body> |
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</html> |