| author | erikj |
| Tue, 12 Sep 2017 19:03:39 +0200 | |
| changeset 47216 | 71c04702a3d5 |
| parent 25859 | jdk/src/java.desktop/share/classes/javax/imageio/metadata/doc-files/png_metadata.html@3317bb8137f4 |
| child 48264 | efda6932a433 |
| permissions | -rw-r--r-- |
| 2 | 1 |
<!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, 2005, 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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<title>PNG Metadata Format Specification</title> |
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</head> |
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<body bgcolor="white"> |
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<center><h1> |
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PNG Metadata Format Specification |
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</h1></center> |
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<p> |
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The PNG native format encodes the complete contents of a PNG file |
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chunk by chunk, except for the IDAT chunks that contain the actual |
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image data. Chunks that are not defined in the PNG 1.2 specification |
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are stored under the <code>UnknownChunks</code> element. Note that it |
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is the responsibility of application software to implement the rules |
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for PNG readers, writers, and editors (<i>e.g.</i>, the rules |
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concerning unsafe-to-copy chunks) described in the PNG specification. |
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The Image I/O library is not, in and of itself, a PNG reader, writer, |
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or editor in the sense of the specification. Rather, it is a tool |
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that may be used to build PNG readers, writers, and editors. |
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<p> |
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The image's actual width, height, bit depth, and color type will |
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override any values passed to the writer via metadata, with one |
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exception. If the image has an <code>IndexColorModel</code>, the |
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color table entries will be checked to determine if they form a |
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uniform grayscale ramp. If so, the image will normally be encoded |
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using as grayscale instead of palette color. However, if the color |
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type set in the metadata is "Palette", palette color will be used. |
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<p> |
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If no metadata is supplied when encoding an image, the header is |
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initialized from the image being encoded, and no optional chunks are |
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included. |
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<p> |
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The semantics of the standard chunks are described in the <A |
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HREF="http://www.libpng.org/pub/png/spec/">PNG specification</A>. |
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Note that there are some restrictions on which chunks may appear |
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for each color type. In particular, |
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<ul> |
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<li>A <code>PLTE</code> chunk may not appear in a <code>Gray</code> |
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or <code>GrayAlpha</code> image |
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<li><code>hIST</code> and <code>tRNS</code> chunks require a prior |
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<code>PLTE</code> chunk |
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<li>A <code>tRNS</code> chunk may not appear in |
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<code>GrayAlpha</code> and <code>RGBA</code> images |
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</ul> |
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The child nodes of the <code>bKGD</code>, <code>sBIT</code>, and |
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<code>tRNS</code> chunks must match the image's color type. |
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<p> |
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Certain chunks may meaningfully appear multiple times in a PNG file, |
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in particular the text-related chunks. In order to simplify the |
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metadata format, multiple instances of these chunks are consolidated |
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under a single parent node (<i>e.g.</i>, the <code>tEXt</code> node), |
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which may have zero or more children (<i>e.g.</i>, |
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<code>tEXtEntry</code> nodes). If no children are present, no chunk |
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will be written. Similarly, unknown chunks are stored as children of |
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a single <code>UnknownChunks</code> node. |
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<p> |
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It is not possible to control the ordering of the chunks as they are |
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written, or to determine the order of the chunks in a file being read. |
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<pre> |
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<!DOCTYPE "javax_imageio_png_1.0" [ |
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<!ELEMENT "javax_imageio_png_1.0" (IHDR?, PLTE?, bKGD?, cHRM?, |
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gAMA?, hIST?, iCCP?, iTXt?, pHYS?, sBIT?, sPLT?, sRGB?, tEXt?, |
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tIME?, tRNS?, zTXt?, UnknownChunks?)> |
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<!ELEMENT "IHDR" EMPTY> |
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<!-- The IHDR chunk, containing the header --> |
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<!ATTLIST "IHDR" "width" #CDATA #REQUIRED> |
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<!-- The width of the image in pixels --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 1 (inclusive) --> |
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<!-- Max value: 2147483647 (inclusive) --> |
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<!ATTLIST "IHDR" "height" #CDATA #REQUIRED> |
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<!-- The height of the image in pixels --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 1 (inclusive) --> |
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<!-- Max value: 2147483647 (inclusive) --> |
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<!ATTLIST "IHDR" "bitDepth" ("1" | "2" | "4" | "8" | "16")
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#REQUIRED> |
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<!-- The bit depth of the image samples --> |
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<!ATTLIST "IHDR" "colorType" ("Grayscale" | "RGB" | "Palette" |
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"GrayAlpha" | "RGBAlpha") #REQUIRED> |
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<!-- The color type of the image --> |
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<!ATTLIST "IHDR" "compressionMethod" ("deflate") #REQUIRED>
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<!-- The compression used for image data, always "deflate" --> |
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<!ATTLIST "IHDR" "filterMethod" ("adaptive") #REQUIRED>
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<!-- The filtering method used for compression, always "adaptive" --> |
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<!ATTLIST "IHDR" "interlaceMethod" ("none" | "adam7") #REQUIRED>
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<!-- The interlacing method, "none" or "adam7" --> |
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<!ELEMENT "PLTE" (PLTEEntry)*> |
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<!-- The PLTE chunk, containing the palette --> |
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<!-- Min children: 1 --> |
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<!-- Max children: 256 --> |
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<!ELEMENT "PLTEEntry" EMPTY> |
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<!-- A palette entry --> |
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<!ATTLIST "PLTEEntry" "index" #CDATA #REQUIRED> |
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<!-- The index of a palette entry --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ATTLIST "PLTEEntry" "red" #CDATA #REQUIRED> |
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<!-- The red value of a palette entry --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ATTLIST "PLTEEntry" "green" #CDATA #REQUIRED> |
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<!-- The green value of a palette entry --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ATTLIST "PLTEEntry" "blue" #CDATA #REQUIRED> |
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<!-- The blue value of a palette entry --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ELEMENT "bKGD" (bKGD_Grayscale | bKGD_RGB | bKGD_Palette)> |
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<!-- The bKGD chunk, containing the background color --> |
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<!ELEMENT "bKGD_Grayscale" EMPTY> |
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<!-- A grayscale background color, for Gray and GrayAlpha images --> |
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<!ATTLIST "bKGD_Grayscale" "gray" #CDATA #REQUIRED> |
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<!-- A gray value to be used as a background --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ELEMENT "bKGD_RGB" EMPTY> |
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<!-- An RGB background color, for RGB and RGBAlpha images --> |
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<!ATTLIST "bKGD_RGB" "red" #CDATA #REQUIRED> |
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<!-- A red value to be used as a background --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ATTLIST "bKGD_RGB" "green" #CDATA #REQUIRED> |
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<!-- A green value to be used as a background --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ATTLIST "bKGD_RGB" "blue" #CDATA #REQUIRED> |
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<!-- A blue value to be used as a background --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ELEMENT "bKGD_Palette" EMPTY> |
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<!-- A background palette index --> |
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<!ATTLIST "bKGD_Palette" "index" #CDATA #REQUIRED> |
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<!-- A palette index to be used as a background --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ELEMENT "cHRM" EMPTY> |
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<!-- The cHRM chunk, containing color calibration --> |
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<!ATTLIST "cHRM" "whitePointX" #CDATA #REQUIRED> |
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<!-- The CIE x coordinate of the white point, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ATTLIST "cHRM" "whitePointY" #CDATA #REQUIRED> |
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<!-- The CIE y coordinate of the white point, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ATTLIST "cHRM" "redX" #CDATA #REQUIRED> |
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<!-- The CIE x coordinate of the red primary, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ATTLIST "cHRM" "redY" #CDATA #REQUIRED> |
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<!-- The CIE y coordinate of the red primary, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ATTLIST "cHRM" "greenX" #CDATA #REQUIRED> |
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<!-- The CIE x coordinate of the green primary, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ATTLIST "cHRM" "greenY" #CDATA #REQUIRED> |
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<!-- The CIE y coordinate of the green primary, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ATTLIST "cHRM" "blueX" #CDATA #REQUIRED> |
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<!-- The CIE x coordinate of the blue primary, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ATTLIST "cHRM" "blueY" #CDATA #REQUIRED> |
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<!-- The CIE y coordinate of the blue primary, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ELEMENT "gAMA" EMPTY> |
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<!-- The gAMA chunk, containing the image gamma --> |
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<!ATTLIST "gAMA" "value" #CDATA #REQUIRED> |
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<!-- The image gamma, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 2147483647 (inclusive) --> |
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<!ELEMENT "hIST" (hISTEntry)*> |
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<!-- The hIST chunk, containing histogram information --> |
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<!-- Min children: 1 --> |
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<!-- Max children: 256 --> |
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<!ELEMENT "hISTEntry" EMPTY> |
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<!-- A histogram entry --> |
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<!ATTLIST "hISTEntry" "index" #CDATA #REQUIRED> |
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<!-- The palette index of this histogram entry --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ATTLIST "hISTEntry" "value" #CDATA #REQUIRED> |
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<!-- The frequency of this histogram entry --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 65535 (inclusive) --> |
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<!ELEMENT "iCCP" EMPTY> |
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<!-- The iCCP chunk, containing an ICC color profile --> |
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<!-- User object: array of byte --> |
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<!-- Min length: 0 --> |
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<!-- Max length: 2147483647 --> |
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<!ATTLIST "iCCP" "profileName" #CDATA #REQUIRED> |
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<!-- The name of this ICC profile --> |
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<!-- Data type: String --> |
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<!ATTLIST "iCCP" "compressionMethod" ("deflate") #REQUIRED>
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<!-- The compression method used to store this ICC profile --> |
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<!ELEMENT "iTXt" (iTXtEntry)*> |
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<!-- The iTXt chunk, containing internationalized text --> |
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<!-- Min children: 1 --> |
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<!-- Max children: 2147483647 --> |
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<!ELEMENT "iTXtEntry" EMPTY> |
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<!-- A localized text entry --> |
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<!ATTLIST "iTXtEntry" "keyword" #CDATA #REQUIRED> |
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<!-- The keyword --> |
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<!-- Data type: String --> |
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<!ATTLIST "iTXtEntry" "compressionFlag" ("TRUE" | "FALSE")
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#REQUIRED> |
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<!ATTLIST "iTXtEntry" "compressionMethod" #CDATA #REQUIRED> |
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<!-- The compression method used to store this iTXt entry --> |
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<!-- Data type: String --> |
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<!ATTLIST "iTXtEntry" "languageTag" #CDATA #REQUIRED> |
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<!-- The ISO tag describing the language this iTXt entry --> |
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<!-- Data type: String --> |
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<!ATTLIST "iTXtEntry" "translatedKeyword" #CDATA #REQUIRED> |
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<!-- The translated keyword for iTXt entry --> |
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<!-- Data type: String --> |
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<!ATTLIST "iTXtEntry" "text" #CDATA #REQUIRED> |
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<!-- The localized text --> |
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<!-- Data type: String --> |
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<!ELEMENT "pHYS" EMPTY> |
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<!-- The pHYS chunk, containing the pixel size and aspect ratio --> |
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<!ATTLIST "pHYS" "pixelsPerUnitXAxis" #CDATA #REQUIRED> |
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<!-- The number of horizontal pixels per unit, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 2147483647 (inclusive) --> |
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<!ATTLIST "pHYS" "pixelsPerUnitYAxis" #CDATA #REQUIRED> |
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<!-- The number of vertical pixels per unit, multiplied by 1e5 --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 2147483647 (inclusive) --> |
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<!ATTLIST "pHYS" "unitSpecifier" ("unknown" | "meter") #REQUIRED>
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<!-- The unit specifier for this chunk (i.e., meters) --> |
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<!ELEMENT "sBIT" (sBIT_Grayscale | sBIT_GrayAlpha | sBIT_RGB | |
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sBIT_RGBAlpha | sBIT_Palette)> |
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<!-- The sBIT chunk, containing significant bit information --> |
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<!ELEMENT "sBIT_Grayscale" EMPTY> |
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<!-- Significant bit information for gray samples --> |
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<!ATTLIST "sBIT_Grayscale" "gray" #CDATA #REQUIRED> |
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<!-- The number of significant bits of the gray samples --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ELEMENT "sBIT_GrayAlpha" EMPTY> |
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<!-- Significant bit information for gray and alpha samples --> |
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<!ATTLIST "sBIT_GrayAlpha" "gray" #CDATA #REQUIRED> |
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<!-- The number of significant bits of the gray samples --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ATTLIST "sBIT_GrayAlpha" "alpha" #CDATA #REQUIRED> |
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<!-- The number of significant bits of the alpha samples --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ELEMENT "sBIT_RGB" EMPTY> |
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<!-- Significant bit information for RGB samples --> |
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<!ATTLIST "sBIT_RGB" "red" #CDATA #REQUIRED> |
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<!-- The number of significant bits of the red samples --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ATTLIST "sBIT_RGB" "green" #CDATA #REQUIRED> |
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<!-- The number of significant bits of the green samples --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ATTLIST "sBIT_RGB" "blue" #CDATA #REQUIRED> |
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<!-- The number of significant bits of the blue samples --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ELEMENT "sBIT_RGBAlpha" EMPTY> |
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<!-- Significant bit information for RGBA samples --> |
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<!ATTLIST "sBIT_RGBAlpha" "red" #CDATA #REQUIRED> |
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<!-- The number of significant bits of the red samples --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ATTLIST "sBIT_RGBAlpha" "green" #CDATA #REQUIRED> |
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<!-- The number of significant bits of the green samples --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ATTLIST "sBIT_RGBAlpha" "blue" #CDATA #REQUIRED> |
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<!-- The number of significant bits of the blue samples --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
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<!ATTLIST "sBIT_RGBAlpha" "alpha" #CDATA #REQUIRED> |
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<!-- The number of significant bits of the alpha samples --> |
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<!-- Data type: Integer --> |
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<!-- Min value: 0 (inclusive) --> |
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<!-- Max value: 255 (inclusive) --> |
|
386 |
||
387 |
<!ELEMENT "sBIT_Palette" EMPTY> |
|
388 |
<!-- Significant bit information for RGB palette entries --> |
|
389 |
<!ATTLIST "sBIT_Palette" "red" #CDATA #REQUIRED> |
|
390 |
<!-- The number of significant bits of the red palette entries --> |
|
391 |
<!-- Data type: Integer --> |
|
392 |
<!-- Min value: 0 (inclusive) --> |
|
393 |
<!-- Max value: 255 (inclusive) --> |
|
394 |
<!ATTLIST "sBIT_Palette" "green" #CDATA #REQUIRED> |
|
395 |
<!-- The number of significant bits of the green palette entries --> |
|
396 |
<!-- Data type: Integer --> |
|
397 |
<!-- Min value: 0 (inclusive) --> |
|
398 |
<!-- Max value: 255 (inclusive) --> |
|
399 |
<!ATTLIST "sBIT_Palette" "blue" #CDATA #REQUIRED> |
|
400 |
<!-- The number of significant bits of the blue palette entries --> |
|
401 |
<!-- Data type: Integer --> |
|
402 |
<!-- Min value: 0 (inclusive) --> |
|
403 |
<!-- Max value: 255 (inclusive) --> |
|
404 |
||
405 |
<!ELEMENT "sPLT" (sPLTEntry)*> |
|
406 |
<!-- The sPLT chunk, containing a suggested palette --> |
|
407 |
<!-- Min children: 1 --> |
|
408 |
<!-- Max children: 256 --> |
|
409 |
||
410 |
<!ELEMENT "sPLTEntry" EMPTY> |
|
411 |
<!-- A suggested palette entry --> |
|
412 |
<!ATTLIST "sPLTEntry" "index" #CDATA #REQUIRED> |
|
413 |
<!-- The index of a suggested palette entry --> |
|
414 |
<!-- Data type: Integer --> |
|
415 |
<!-- Min value: 0 (inclusive) --> |
|
416 |
<!-- Max value: 255 (inclusive) --> |
|
417 |
<!ATTLIST "sPLTEntry" "red" #CDATA #REQUIRED> |
|
418 |
<!-- The red value of a suggested palette entry --> |
|
419 |
<!-- Data type: Integer --> |
|
420 |
<!-- Min value: 0 (inclusive) --> |
|
421 |
<!-- Max value: 255 (inclusive) --> |
|
422 |
<!ATTLIST "sPLTEntry" "green" #CDATA #REQUIRED> |
|
423 |
<!-- The green value of a suggested palette entry --> |
|
424 |
<!-- Data type: Integer --> |
|
425 |
<!-- Min value: 0 (inclusive) --> |
|
426 |
<!-- Max value: 255 (inclusive) --> |
|
427 |
<!ATTLIST "sPLTEntry" "blue" #CDATA #REQUIRED> |
|
428 |
<!-- The blue value of a suggested palette entry --> |
|
429 |
<!-- Data type: Integer --> |
|
430 |
<!-- Min value: 0 (inclusive) --> |
|
431 |
<!-- Max value: 255 (inclusive) --> |
|
432 |
<!ATTLIST "sPLTEntry" "alpha" #CDATA #REQUIRED> |
|
433 |
<!-- The blue value of a suggested palette entry --> |
|
434 |
<!-- Data type: Integer --> |
|
435 |
<!-- Min value: 0 (inclusive) --> |
|
436 |
<!-- Max value: 255 (inclusive) --> |
|
437 |
||
438 |
<!ELEMENT "sRGB" EMPTY> |
|
439 |
<!-- The sRGB chunk, containing rendering intent information --> |
|
440 |
<!ATTLIST "sRGB" "renderingIntent" ("Perceptual" |
|
|
441 |
"Relative colorimetric" | "Saturation" | |
|
442 |
"Absolute colorimetric") #REQUIRED> |
|
443 |
<!-- The rendering intent --> |
|
444 |
||
445 |
<!ELEMENT "tEXt" (tEXtEntry)*> |
|
446 |
<!-- The tEXt chunk, containing text --> |
|
447 |
<!-- Min children: 1 --> |
|
448 |
<!-- Max children: 2147483647 --> |
|
449 |
||
450 |
<!ELEMENT "tEXtEntry" EMPTY> |
|
451 |
<!-- A text entry --> |
|
452 |
<!ATTLIST "tEXtEntry" "keyword" #CDATA #REQUIRED> |
|
453 |
<!-- The keyword --> |
|
454 |
<!-- Data type: String --> |
|
455 |
<!ATTLIST "tEXtEntry" "value" #CDATA #REQUIRED> |
|
456 |
<!-- The text --> |
|
457 |
<!-- Data type: String --> |
|
458 |
||
459 |
<!ELEMENT "tIME" EMPTY> |
|
460 |
<!-- The tIME chunk, containing the image modification time --> |
|
461 |
<!ATTLIST "tIME" "year" #CDATA #REQUIRED> |
|
462 |
<!-- The year when the image was last modified --> |
|
463 |
<!-- Data type: Integer --> |
|
464 |
<!-- Min value: 0 (inclusive) --> |
|
465 |
<!-- Max value: 65535 (inclusive) --> |
|
466 |
<!ATTLIST "tIME" "month" #CDATA #REQUIRED> |
|
467 |
<!-- The month when the image was last modified, 1 = January --> |
|
468 |
<!-- Data type: Integer --> |
|
469 |
<!-- Min value: 1 (inclusive) --> |
|
470 |
<!-- Max value: 12 (inclusive) --> |
|
471 |
<!ATTLIST "tIME" "day" #CDATA #REQUIRED> |
|
472 |
<!-- The day of the month when the image was last modified --> |
|
473 |
<!-- Data type: Integer --> |
|
474 |
<!-- Min value: 1 (inclusive) --> |
|
475 |
<!-- Max value: 31 (inclusive) --> |
|
476 |
<!ATTLIST "tIME" "hour" #CDATA #REQUIRED> |
|
477 |
<!-- The hour when the image was last modified --> |
|
478 |
<!-- Data type: Integer --> |
|
479 |
<!-- Min value: 0 (inclusive) --> |
|
480 |
<!-- Max value: 23 (inclusive) --> |
|
481 |
<!ATTLIST "tIME" "minute" #CDATA #REQUIRED> |
|
482 |
<!-- The minute when the image was last modified --> |
|
483 |
<!-- Data type: Integer --> |
|
484 |
<!-- Min value: 0 (inclusive) --> |
|
485 |
<!-- Max value: 59 (inclusive) --> |
|
486 |
<!ATTLIST "tIME" "second" #CDATA #REQUIRED> |
|
487 |
<!-- The second when the image was last modified, 60 = leap second --> |
|
488 |
<!-- Data type: Integer --> |
|
489 |
<!-- Min value: 0 (inclusive) --> |
|
490 |
<!-- Max value: 60 (inclusive) --> |
|
491 |
||
492 |
<!ELEMENT "tRNS" (tRNS_Grayscale | tRNS_RGB | tRNS_Palette)> |
|
493 |
<!-- The tRNS chunk, containing transparency information --> |
|
494 |
||
495 |
<!ELEMENT "tRNS_Grayscale" EMPTY> |
|
496 |
<!-- A grayscale value that should be considered transparent --> |
|
497 |
<!ATTLIST "tRNS_Grayscale" "gray" #CDATA #REQUIRED> |
|
498 |
<!-- The gray value to be considered transparent --> |
|
499 |
<!-- Data type: Integer --> |
|
500 |
<!-- Min value: 0 (inclusive) --> |
|
501 |
<!-- Max value: 65535 (inclusive) --> |
|
502 |
||
503 |
<!ELEMENT "tRNS_RGB" EMPTY> |
|
504 |
<!-- An RGB value that should be considered transparent --> |
|
505 |
<!ATTLIST "tRNS_RGB" "red" #CDATA #REQUIRED> |
|
506 |
<!-- The red value to be considered transparent --> |
|
507 |
<!-- Data type: Integer --> |
|
508 |
<!-- Min value: 0 (inclusive) --> |
|
509 |
<!-- Max value: 65535 (inclusive) --> |
|
510 |
<!ATTLIST "tRNS_RGB" "green" #CDATA #REQUIRED> |
|
511 |
<!-- The green value to be considered transparent --> |
|
512 |
<!-- Data type: Integer --> |
|
513 |
<!-- Min value: 0 (inclusive) --> |
|
514 |
<!-- Max value: 65535 (inclusive) --> |
|
515 |
<!ATTLIST "tRNS_RGB" "blue" #CDATA #REQUIRED> |
|
516 |
<!-- The blure value to be considered transparent --> |
|
517 |
<!-- Data type: Integer --> |
|
518 |
<!-- Min value: 0 (inclusive) --> |
|
519 |
<!-- Max value: 65535 (inclusive) --> |
|
520 |
||
521 |
<!ELEMENT "tRNS_Palette" EMPTY> |
|
522 |
<!-- A palette index that should be considered transparent --> |
|
523 |
<!ATTLIST "tRNS_Palette" "index" #CDATA #REQUIRED> |
|
524 |
<!-- A palette index to be considered transparent --> |
|
525 |
<!-- Data type: Integer --> |
|
526 |
<!-- Min value: 0 (inclusive) --> |
|
527 |
<!-- Max value: 255 (inclusive) --> |
|
528 |
<!ATTLIST "tRNS_Palette" "alpha" #CDATA #REQUIRED> |
|
529 |
<!-- The transparency associated with the palette entry --> |
|
530 |
<!-- Data type: Integer --> |
|
531 |
<!-- Min value: 0 (inclusive) --> |
|
532 |
<!-- Max value: 255 (inclusive) --> |
|
533 |
||
534 |
<!ELEMENT "zTXt" (zTXtEntry)*> |
|
535 |
<!-- The zTXt chunk, containing compressed text --> |
|
536 |
<!-- Min children: 1 --> |
|
537 |
<!-- Max children: 2147483647 --> |
|
538 |
||
539 |
<!ELEMENT "zTXtEntry" EMPTY> |
|
540 |
<!-- A compressed text entry --> |
|
541 |
<!-- User object: array of byte --> |
|
542 |
<!-- Min length: 0 --> |
|
543 |
<!-- Max length: 2147483647 --> |
|
544 |
<!ATTLIST "zTXtEntry" "keyword" #CDATA #REQUIRED> |
|
545 |
<!-- The keyword --> |
|
546 |
<!-- Data type: String --> |
|
547 |
<!ATTLIST "zTXtEntry" "compressionMethod" ("deflate")
|
|
548 |
#REQUIRED> |
|
549 |
<!-- The compressed text --> |
|
550 |
||
551 |
<!ELEMENT "UnknownChunks" (UnknownChunk)*> |
|
552 |
<!-- A set of unknown chunks --> |
|
553 |
<!-- Min children: 1 --> |
|
554 |
<!-- Max children: 2147483647 --> |
|
555 |
||
556 |
<!ELEMENT "UnknownChunk" EMPTY> |
|
557 |
<!-- Unknown chunk data stored as a byte array --> |
|
558 |
<!-- User object: array of byte --> |
|
559 |
<!-- Min length: 0 --> |
|
560 |
<!-- Max length: 2147483647 --> |
|
561 |
<!ATTLIST "UnknownChunk" "type" #CDATA #REQUIRED> |
|
562 |
<!-- The 4-character type of the unknown chunk --> |
|
563 |
<!-- Data type: String --> |
|
564 |
]> |
|
565 |
</pre> |
|
566 |
||
567 |
</body> |
|
568 |
</html> |