Extension:ImageSizeInfoFunctions

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ImageSizeInfoFunctions Release status: stable
Implementation	Parser function
Description	return image width and height in pixel
Author(s)	Dario de Judicibus, (mantainer Giuseppe Briotti)
Last Version	1.0.1 (2009-01-24)
MediaWiki	1.8, 1.9, 1.10
License	No license specified
Download	ImageSizeInfoFunctions.php
check usage (experimental)

[edit] Introduction

ImageSizeInfoFunctions is an extension to MediaWiki that gives two parser functions returning width and height size of a given image, available in the wiki.

Its purpose is to make it easier to create a template for resizing an image in percentage instead of absolute size. This is useful for images gallery based on images of the same scale but different size.

[edit] Features

• imageWidth (imgw) returns the image width in pixel.
• imageHeight (imgh) returns the image height in pixel.

[edit] Installation

1. Download ImageSizeInfoFunctions.php
2. Download ImageSizeInfoFunctions.i18n.php
3. Save both files in the new extensions/ImageSizeInfoFunctions directory of your wiki.
4. Insert these lines in the LocalSettings.php file:

// Activate ImageSizeInfoFunctions extension
include_once('extensions/ImageSizeInfoFunctions/ImageSizeInfoFunctions.php');

[edit] Configuration

no configuration required

[edit] Usage

As for all parser functions:

{{#imgw: [image name] }}

{{#imgh: [image name] }}

[edit] Template Example

This template is useful for scaling the given image by percentage or, as usual, by absolute size:

<includeonly>[[Image:{{{imagename}}}|{{ #if:{{#pos:{{{newwidth|100}}}|px}}|{{{newwidth|100}}}| {{#expr: ({{#imgw: {{{imagename}}} }} * {{{newwidth|100}}}) / 100 }}px }}|{{{caption|}}}]]</includeonly>

Thus, assuming that the template is called ScaleImage:

Scaling the image to 15%:

{{ScaleImage
|imagename=eland.png
|caption=Città di Eland
|newwidth=15
}}

Scaling the image to 80 pixel:

{{ScaleImage
|imagename=eland.png
|caption=Città di Eland
|newwidth=80px
}}

[edit] Version history

• 0.0.1 - testing
• 1.0.0 - first stable release
• 1.0.1 - improvement suggested by G.Hagedorn in discussion page

[edit] Alternatives

[edit] Feedback

Use the discussion page for feedback, questions, feature requests and bug reports.

[edit] Sites using this extension

• wiki dedicated to DSA role playing game