What should I do if the thumbnail is distorted when calling DreamWeaver CMS?

Solution to the distortion of thumbnails called by DreamWeaver cms: 1. In "System-Attachment Settings", set the default width and height of the thumbnails to be greater than or equal to the maximum size of all called thumbnails in the entire site; 2. Open the "/include/extend.func.php" file and add the code as "function thumb($imgurl, $width, $height, $bg = true){...}".

The operating environment of this tutorial: Windows 10 system, DedeCMS version 5.7, Dell G3 computer.

What should I do if the thumbnail is distorted when calling DreamWeaver cms?

Solution to dede thumbnail distortion and blurring

Since dedecms only generates one size thumbnail by default, the thumbnails required in different pages of a website are often The thumbnails are inconsistent in size and proportion, which results in unclear and distorted thumbnails, which cannot meet the needs of most websites. This article gives an ultimate solution

Modification method:

1. To obtain clear thumbnails, you need to have a large enough image and crop it accurately. The following method is to crop based on the thumbnail (because some websites in the original image have watermarks), so you must Make sure that the original thumbnail is large enough, so you need to make some settings: System - Attachment Settings, set the default width and default height of the thumbnail to be greater than or equal to the maximum size of all the thumbnails called in your entire site. Please also cut it to be large enough for manual cutting. (No need to cut it by hand)

2. Open the /include/extend.func.php file (Note: This file is prepared for secondary development and used for functional method expansion)

Add the following code before the last ?>:

function thumb($imgurl, $width, $height, $bg = true)
{
global $cfg_mainsite,$cfg_multi_site;
$thumb = eregi("http://",$imgurl)?str_replace($cfg_mainsite,'',$imgurl):$imgurl;
list($thumbname,$extname) = explode('.',$thumb);
$newthumb = $thumbname.'_'.$width.'_'.$height.'.'.$extname;
if(!$thumbname || !$extname || !file_exists(DEDEROOT.$thumb)) return $imgurl;
if(!file_exists(DEDEROOT.$newthumb))
{
include_once DEDEINC.'/image.func.php';
if($bg==true)
{
ImageResizeNew(DEDEROOT.$thumb, $width, $height, DEDEROOT.$newthumb);
}
else
{
ImageResize(DEDEROOT.$thumb, $width, $height, DEDEROOT.$newthumb);
}
}
return $cfg_multi_site=='Y'?$cfg_mainsite.$newthumb:$newthumb;
}

Calling method:

[field:picname function='thumb(@me,$width,$height,$bg)'/]

Parameter description:

$width: thumbnail width (integer)

$height: Thumbnail height (integer)

$bg: Whether to fill with blanks, automatically filled by default, background fill color is in the system-accessory settings (true/false)

Example:

Call a thumbnail with a length and width of 100 pixels: [field:picname function='thumb(@me,100,100)'/]

Retain the original proportion , no automatic filling (not recommended): [field:picname function='thumb(@me,100,100,false)'/]

Recommended learning: dedecms tutorial

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