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-<?xml version="1.0" encoding="utf-8" ?>
-<!DOCTYPE chapter SYSTEM "chapter.dtd">
-
-<chapter>
- <header>
- <copyright>
- <year>2007</year>
- <year>2016</year>
- <holder>Ericsson AB, All Rights Reserved</holder>
- </copyright>
- <legalnotice>
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-
- The Initial Developer of the Original Code is Ericsson AB.
- </legalnotice>
-
- <title>egd</title>
- <prepared>Björn-Egil Dahlberg</prepared>
- <docno></docno>
- <date>2007-11-03</date>
- <rev>A</rev>
- <file>egd_ug.xml</file>
- </header>
- <section>
- <title>Introduction</title>
- <p>
- The egd module is an interface for 2d-image rendering and is used by
- Percept to generate dynamic graphs to its web pages. All code is pure
- erlang, no drivers needed.
- </p>
- <p>
- The library is intended for small to medium image sizes with low
- complexity for optimal performance. The library handles horizontal
- lines better then vertical lines.
- </p>
- <p>
- The foremost purpose for this module is to enable users to
- generate images from erlang code and/or datasets and to
- send these images to either files or web servers.
- </p>
- </section>
- <section>
- <title>File example</title>
- <p>Drawing examples:</p>
- <codeinclude file="img.erl" tag="" type="none"></codeinclude>
- <p> First save. </p>
- <image file="test1.gif">
- <icaption>test1.png</icaption>
- </image>
-
- <p> Second save. </p>
- <image file="test2.gif">
- <icaption>test2.png</icaption>
- </image>
-
- <p> Third save. </p>
- <image file="test3.gif">
- <icaption>test3.png</icaption>
- </image>
-
- <p> Fourth save. </p>
- <image file="test4.gif">
- <icaption>test4.png</icaption>
- </image>
- </section>
- <section>
- <title>ESI example</title>
- <p>Using egd with inets ESI to generate images on the fly:</p>
- <codeinclude file="img_esi.erl" tag="" type="none"></codeinclude>
- <image file="img_esi_result.gif">
- <icaption>Example of result.</icaption>
- </image>
- <p>
- For more information regarding ESI, please see inets application
- <seealso marker="inets:mod_esi">mod_esi</seealso>.
- </p>
- </section>
-</chapter>
-
-