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|
<?php // -*-php-*-
rcs_id('$Id: CacheTest.php,v 1.2 2003/01/18 21:19:25 carstenklapp Exp $');
// +---------------------------------------------------------------------+
// | CacheTest.php |
// +---------------------------------------------------------------------+
// | simple test of the WikiPluginCached class which provides a |
// | text to image conversion. |
// | This is a usage example of WikiPluginCached. |
// | |
// | Copyright (C) 2002 Johannes Groe (Johannes Große) |
// | You may copy this code freely under the conditions of the GPL |
// +---------------------------------------------------------------------+
/*------------------------------------------------------------------------
| CacheTest
*------------------------------------------------------------------------
|
| You may call this plugin as follows:
|
| <?plugin CacheTest text="What a wonderful test!" ?>
|
/*-----------------------------------------------------------------------
|
| Source
|
*----------------------------------------------------------------------*/
/*-----------------------------------------------------------------------
| WikiPlugin_CacheTest
*----------------------------------------------------------------------*/
require_once "lib/WikiPluginCached.php";
class WikiPlugin_CacheTest
extends WikiPluginCached
{
/* --------- overwrite virtual or abstract methods ---------------- */
function getPluginType() {
return PLUGIN_CACHED_IMG_ONDEMAND;
}
function getName() {
return "CacheTest";
}
function getDescription() {
return 'This is a simple example using WikiPluginCached.';
}
function getVersion() {
return preg_replace("/[Revision: $]/", '',
"\$Revision: 1.2 $");
}
function getDefaultArguments() {
return array('text' => $this->getDescription(),
'font' => '3',
'type' => 'png' );
}
// should return image handle
//
// if an error occurs you MUST call
// $this->complain('aboutwhichidocomplain') you may produce an
// image handle to an error image if you do not,
// WikiPluginImageCache will do so.
function getImage($dbi, $argarray, $request) {
extract($argarray);
return $this->produceGraphics($text,$font);
// This should also work
// return $this->lazy_produceGraphics($text,$font);
} // getImage
function getImageType($dbi, $argarray, $request) {
extract($argarray);
if (in_array($type, array('png', 'gif', 'jpg'))) {
return $type;
}
return 'png';
}
function getAlt($dbi, $argarray, $request) {
// ALT-text for <img> tag
extract($argarray);
return $text;
}
function getExpire($dbi, $argarray, $request) {
return '+600'; // 600 seconds life time
}
/* -------------------- extremely simple converter -------------------- */
function produceGraphics($text, $font ) {
// The idea (and some code) is stolen from the text2png plugin
// but I did not want to use TTF. ImageString is quite ugly
// and quite compatible. It's only a usage example.
if ($font<1 || $font>5) {
$text = "Fontnr. (font=\"$font\") should be in range 1-5";
$this->complain($text);
$font = 3;
}
$ok = ($im = @ImageCreate(400, 40));
$bg_color = ImageColorAllocate($im, 240, 240, 240);
$text_color1 = ImageColorAllocate($im, 120, 120, 120);
$text_color2 = ImageColorAllocate($im, 0, 0, 0);
ImageFilledRectangle($im, 0, 0, 149, 49, $bg_color);
ImageString($im, $font, 11, 12, $text, $text_color1);
ImageString($im, $font, 10, 10, $text, $text_color2);
if (!$ok) {
// simple error handling by WikiPluginImageCache
$this->complain("Could not create image");
return false;
}
// image creation takes really _much_ time :-)
// so caching is very useful!
sleep(4);
return $im;
} // produce_Graphics
/* -------------------------------------------------------------------- */
// we could have used the simple built-in text2img function
// instead of writing our own:
function lazy_produceGraphics( $text, $font ) {
if ($font<1 || $font>5) {
$text = "Fontnr. (font=\"$font\") should be in range 1-5";
$this->complain($text);
$font = 3;
}
return $this->text2img($text, $font, array(0, 0, 0),
array(255, 255, 255));
} // lazy_produceGraphics
} // WikiPlugin_CacheTest
// $Log: CacheTest.php,v $
// Revision 1.2 2003/01/18 21:19:25 carstenklapp
// Code cleanup:
// Reformatting; added copyleft, getVersion, getDescription
//
// For emacs users
// Local Variables:
// mode: php
// tab-width: 4
// c-basic-offset: 4
// c-hanging-comment-ender-p: nil
// indent-tabs-mode: nil
// End:
?>
|
