jdk/src/java.desktop/share/classes/javax/imageio/package.html
changeset 46338 e84b501fa52e
parent 46337 307e52ec20cd
parent 44236 d1cab6c7e608
child 46339 b80e814907b1
--- a/jdk/src/java.desktop/share/classes/javax/imageio/package.html	Sun Mar 19 16:40:09 2017 -0400
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-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
-<html>
-<head>
-<!--
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--->
-
-</head>
-
-<body bgcolor="white">
-
-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</code> class.
-
-<p>
-
-This package contains the basic classes and interfaces for describing
-the contents of image files, including metadata and thumbnails
-(<code>IIOImage</code>); for controlling the image reading process
-(<code>ImageReader</code>, <code>ImageReadParam</code>, and
-<code>ImageTypeSpecifier</code>) and image writing process
-(<code>ImageWriter</code> and <code>ImageWriteParam</code>); for
-performing transcoding between formats (<code>ImageTranscoder</code>),
-and for reporting errors (<code>IIOException</code>).
-
-<p>
-All implementations of javax.imageio provide the following standard
-image format plug-ins:
-</p>
-<div>
-<table border=1 align='center' cellpadding=5>
-<tr>
-    <th>&nbsp;</th> <th>Reading</th> <th>Writing</th>
-    <th>Notes</th> <th>Metadata</th>
-</tr>
-<!-- BMP plugin -->
-<tr>
-    <td><a href="https://msdn.microsoft.com/en-us/library/dd183391.aspx">BMP</a></td>
-    <td align='center'>yes</td>
-    <td align='center'>yes</td>
-    <td align='center'>none</td>
-    <td align='center'><a href='metadata/doc-files/bmp_metadata.html'>
-    BMP metadata format</a></td>
-</tr>
-<!-- GIF plugin -->
-<tr>
-    <td><a href="http://www.w3.org/Graphics/GIF/spec-gif89a.txt">GIF</a></td>
-    <td align='center'>yes</td>
-    <td align='center'>yes</td>
-    <td align='center'><a href="#gif_plugin_notes">
-    GIF plug-in notes</a></td>
-    <td align='center'><a href='metadata/doc-files/gif_metadata.html'>
-    GIF metadata format</a></td>
-</tr>
-<!-- JPEG plugin -->
-<tr>
-    <td> <a href="http://www.jpeg.org">JPEG</a></td>
-    <td align='center'>yes</td>
-    <td align='center'>yes</td>
-    <td align='center'>none</td>
-    <td align='center'><a href='metadata/doc-files/jpeg_metadata.html'>
-    JPEG metadata format</a></td>
-</tr>
-<!-- PNG plugin -->
-<tr>
-    <td><a href="http://www.libpng.org/pub/png/spec/">PNG</a></td>
-    <td align='center'>yes</td>
-    <td align='center'>yes</td>
-    <td align='center'>none</td>
-    <td align='center'><a href='metadata/doc-files/png_metadata.html'>
-    PNG metadata format</a></td>
-</tr>
-<!-- TIFF plugin -->
-<tr>
-    <td><a href="https://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf">TIFF</a></td>
-    <td align='center'>yes</td>
-    <td align='center'>yes</td>
-    <td align='center'><a href='metadata/doc-files/tiff_metadata.html#Reading'>
-    TIFF plug-in notes</td>
-    <td align='center'><a href='metadata/doc-files/tiff_metadata.html#StreamMetadata'>
-    TIFF metadata format</a></td>
-</tr>
-<!-- WBMP plugin -->
-<tr>
-    <td><a href="http://www.wapforum.org/what/technical/SPEC-WAESpec-19990524.pdf">WBMP</a></td>
-    <td align='center'>yes</td>
-    <td align='center'>yes</td>
-    <td align='center'>none</td>
-    <td align='center'><a href='metadata/doc-files/wbmp_metadata.html'>
-    WBMP metadata format</a></td>
-</tr>
-</table>
-</div>
-<BR>
-<BR>
-<BR>
-
-<h2> Standard Plug-in Notes</h2>
-<h3><a name="gif_plugin_notes">Standard plug-in for GIF image format</a></h3>
-
-
-<p>
-ImageIO provides <code>ImageReader</code> and <code>ImageWriter</code>
-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>the number of bits per sample is not greater than 8;
-<li>the size of a color component is not greater than 8;
-</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>).
-</p> 
- 
- 
-<!-- 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</code> class.
- 
- <!-- TODO: add example here --> 
-</p>
- 
-<!--  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>
- 
- <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>
- 
- <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. 
- 
- </p>
- 
- <!-- writing interlaced images -->
- <p>
- 
-  The writing of interlaced images can be controlled by the progressive
-  mode of the provided <code>ImageWriteParam</code> instance.
-  If progressive mode is
-  <code>MODE_DISABLED</code> then a non-interlaced image will be written. If
-  progressive mode is <code>MODE_DEFAULT</code> then an interlaced image will
-  be written. If progressive mode is <code>MODE_COPY_FROM_METADATA</code>, then
-  the metadata setting is used (if it is provided, otherwise an interlaced
-  image will be written).
- </p>
- 
- <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>.
- </p>
-
-
-<!--
-
-<HR>
-
-Java<SUP><FONT SIZE="-2">TM</FONT></SUP> Image I/O API Specification
-<BR>
-<BR>
-Public Draft 2 (specification version 0.5)
-<BR>
-Release: October 1, 2000
-<BR>
-<BR>
-
-<HR>
-
--->
-
-@since 1.4
-</body>
-</html>