| /* |
| * Copyright (c) 2000, 2017, 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. |
| */ |
| |
| /** |
| * The main package of the Java Image I/O API. |
| * <p> |
| * Many common image I/O operations may be performed using the static methods of |
| * the {@code ImageIO} class. |
| * <p> |
| * This package contains the basic classes and interfaces for describing the |
| * contents of image files, including metadata and thumbnails |
| * ({@code IIOImage}); for controlling the image reading process |
| * ({@code ImageReader}, {@code ImageReadParam}, and {@code ImageTypeSpecifier}) |
| * and image writing process ({@code ImageWriter} and {@code ImageWriteParam}); |
| * for performing transcoding between formats ({@code ImageTranscoder}), and for |
| * reporting errors ({@code IIOException}). |
| * <p> |
| * All implementations of javax.imageio provide the following standard image |
| * format plug-ins: |
| * |
| * <table class="striped"> |
| * <caption>Standard image format plug-ins</caption> |
| * <thead> |
| * <tr> |
| * <th scope="col">Image format |
| * <th scope="col">Reading |
| * <th scope="col">Writing |
| * <th scope="col">Notes |
| * <th scope="col">Metadata |
| * </thead> |
| * <tbody> |
| * <!-- BMP plugin --> |
| * <tr> |
| * <th scope="row"> |
| * <a href="https://msdn.microsoft.com/en-us/library/dd183391.aspx">BMP</a> |
| * <td>yes |
| * <td>yes |
| * <td>none |
| * <td><a href='metadata/doc-files/bmp_metadata.html'>BMP |
| * metadata format</a> |
| * <!-- GIF plugin --> |
| * <tr> |
| * <th scope="row"> |
| * <a href="http://www.w3.org/Graphics/GIF/spec-gif89a.txt">GIF</a> |
| * <td>yes |
| * <td>yes |
| * <td><a href="#gif_plugin_notes">GIF plug-in notes</a> |
| * <td><a href='metadata/doc-files/gif_metadata.html'>GIF |
| * metadata format</a> |
| * <!-- JPEG plugin --> |
| * <tr> |
| * <th scope="row"><a href="http://www.jpeg.org">JPEG</a> |
| * <td>yes |
| * <td>yes |
| * <td>none |
| * <td><a href='metadata/doc-files/jpeg_metadata.html'> |
| * JPEG metadata format</a> |
| * <!-- PNG plugin --> |
| * <tr> |
| * <th scope="row"><a href="http://www.libpng.org/pub/png/spec/">PNG</a> |
| * <td>yes |
| * <td>yes |
| * <td>none |
| * <td><a href='metadata/doc-files/png_metadata.html'>PNG |
| * metadata format</a> |
| * <!-- TIFF plugin --> |
| * <tr> |
| * <th scope="row"> |
| * <a href="https://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf"> |
| * TIFF</a> |
| * <td>yes |
| * <td>yes |
| * <td> |
| * <a href='metadata/doc-files/tiff_metadata.html#Reading'>TIFF plug-in |
| * notes</a> |
| * <td> |
| * <a href='metadata/doc-files/tiff_metadata.html#StreamMetadata'>TIFF |
| * metadata format</a> |
| * <!-- WBMP plugin --> |
| * <tr> |
| * <th scope="row"> |
| * <a href="http://www.wapforum.org/what/technical/SPEC-WAESpec-19990524.pdf"> |
| * WBMP</a> |
| * <td>yes |
| * <td>yes |
| * <td>none |
| * <td><a href='metadata/doc-files/wbmp_metadata.html'> |
| * WBMP metadata format</a> |
| * </tbody> |
| * </table> |
| * |
| * <h2> Standard Plug-in Notes</h2> |
| * |
| * <h3><a id="gif_plugin_notes">Standard plug-in for GIF image format</a></h3> |
| * ImageIO provides {@code ImageReader} and {@code ImageWriter}plug-ins for the |
| * <a href="http://www.w3.org/Graphics/GIF/spec-gif89a.txt"> Graphics |
| * Interchange Format (GIF)</a> image format. These are the "standard" GIF |
| * plug-ins, meaning those that are included in the JRE, as distinct from those |
| * included in standard extensions, or 3rd party plug-ins. The following notes |
| * and metadata specification apply to the standard plug-ins. |
| * |
| * <h3>Writing GIF images</h3> |
| * The GIF image writer plug-in guarantees lossless writing for images which |
| * meet the following requirements: |
| * <ul> |
| * <li>the number of bands is 1;</li> |
| * <li>the number of bits per sample is not greater than 8;</li> |
| * <li>the size of a color component is not greater than 8;</li> |
| * </ul> |
| * <p> |
| * By default the GIF writer plug-in creates version "89a" images. This can be |
| * changed to "87a" by explicitly setting the version in the stream metadata |
| * (see |
| * <a href="metadata/doc-files/gif_metadata.html#gif_stream_metadata_format"> |
| * GIF Stream Metadata Format Specification</a>). |
| * |
| * <!-- animated images --> |
| * <p> |
| * The GIF writer plug-in supports the creation of animated GIF images through |
| * the standard sequence writing methods defined in the {@code ImageWriter} |
| * class. |
| * |
| * <!-- TODO: add example here --> |
| * |
| * <!-- color tables --> |
| * <p> |
| * A global color table is written to the output stream if one of the following |
| * conditions is met: |
| * <ul> |
| * <li>stream metadata containing a GlobalColorTable element is supplied; |
| * </li> |
| * <li>a sequence is being written and image metadata containing a |
| * LocalColorTable element is supplied for the first image in the sequence; |
| * </li> |
| * <li>image metadata is not supplied or does not contain a LocalColorTable |
| * element.</li> |
| * </ul> |
| * <p> |
| * In the first case the global color table in the stream metadata is used, in |
| * the second the local color table in the image metadata is used, and in the |
| * third a global color table is created from the ColorModel or SampleModel of |
| * the (first) image. |
| * <p> |
| * A local color table is written to the output stream only if image metadata |
| * containing a LocalColorTable element is supplied to the writer, or no image |
| * metadata is supplied to the writer and the local color table which would be |
| * generated from the image itself is not equal to the global color table. |
| * <p> |
| * A Graphic Control Extension block is written to the output stream only if |
| * image metadata containing a GraphicControlExtension element is supplied to |
| * the writer, or no image metadata is supplied and the local color table |
| * generated from the image requires a transparent index. Application, Plain |
| * Text, and Comment Extension blocks are written only if they are supplied to |
| * the writer via image metadata. |
| * |
| * <!-- writing interlaced images --> |
| * <p> |
| * The writing of interlaced images can be controlled by the progressive mode of |
| * the provided {@code ImageWriteParam} instance. If progressive mode is |
| * {@code MODE_DISABLED} then a non-interlaced image will be written. If |
| * progressive mode is {@code MODE_DEFAULT} then an interlaced image will be |
| * written. If progressive mode is {@code MODE_COPY_FROM_METADATA}, then the |
| * metadata setting is used (if it is provided, otherwise an interlaced image |
| * will be written). |
| * <p> |
| * The GIF image writer plug-in supports setting output stream metadata from |
| * metadata supplied to the writer in either the native GIF stream metadata |
| * format |
| * <a href="metadata/doc-files/gif_metadata.html#gif_stream_metadata_format"> |
| * javax_imageio_gif_stream_1.0</a> or the standard metadata format |
| * <a href="metadata/doc-files/standard_metadata.html">javax_imageio_1.0</a>, |
| * and setting output image metadata from metadata supplied to the writer in |
| * either the native GIF image metadata format |
| * <a href="metadata/doc-files/gif_metadata.html#gif_image_metadata_format"> |
| * javax_imageio_gif_image_1.0</a> or the standard metadata format |
| * <a href="metadata/doc-files/standard_metadata.html">javax_imageio_1.0</a>. |
| * The mapping of standard metadata format to the GIF native stream and image |
| * metadata formats is given in the tables |
| * <a href="metadata/doc-files/gif_metadata.html#mapping">here</a>. |
| * |
| * @since 1.4 |
| */ |
| package javax.imageio; |
