Get Image "quality" value from $image instance?

[Gazley]

Hi there,

I'm using ImageSizerEngineIMagic and it has an overridable, default image quality value.

In my application code, you can override the module's value based on a user Page field value. However, if there is no "custom" value in the page field, I'd like to be able to access the ImageSizerEngineIMagic module's default value.

There is likely a very easy way to do this. If anyone could point me to it, I'd be very grateful!

Many thanks. 

[horst]

Hi Gazley,

I'm not sure if I fully get what you are after, but I try to answer.

You can access an Imagesizer instance like this:

$ImageSizer = new ImageSizer();

// or, maybe better, with an image-filename
$filename = $page->images->first()->filename;
$ImageSizer = new ImageSizer($filename);

Now you can query everything you want:

• https://github.com/ryancramerdesign/ProcessWire/blob/devns/wire/core/ImageSizer.php#L312-L321
• https://github.com/ryancramerdesign/ProcessWire/blob/devns/wire%2Fcore%2FImageSizerEngine.php#L1110-L1131
• https://github.com/ryancramerdesign/ProcessWire/blob/devns/wire%2Fcore%2FImageSizerEngine.php#L205-L216

$quality = $ImageSizer->quality; // returns the calculated value from: engine-default-setting => wire/config.php => site/config.php

EDIT:

Or do you mean the new modules configurable default settings of the ImagesizerEngines?

If yes, you can use the $modules method getModuleConfigData()

$configdata = wire('modules')->getModuleConfigData('ImageSizerEngineIMagic');
$defaultQuality = $configdata['quality'];

Edited April 25, 2016 by horst

[Gazley]

Hi @horst - many thanks for your reply. It's a really great answer and I appreciate you taking the time to provide this information.

I guess I thought some metadata, like "quality", could be accessed directly from an Image instance but as you have shown, it's easy enough to new-up an ImageSizer object.

Thank you!