how do I change or off in backend for uploading image default MAX WIDTH?

Question

In Backend -> PRODUCTS -> CATALOG -> [any product] -> Images and Videos when uploading images, Magento automatically makes resize(max-width 1920px). I need a image width 2600px. each product with self background. I created the Image-attribute: produkt_bg and show it on the product page. but the width is not enough.

How do I change this or turn it off in backend for uploading image default MAX WIDTH?

Answer 1

After a lot of digging in the code, I found that M2 resize the image on the client, that's it, before even uploading to the server. This will be true if you use a browser that support Canvas and the File API.

To prevent this, you have to remove:

// vendor/magento/module-backend/view/adminhtml/web/js/media-uploader.js:113
{
     action: 'resize',
     maxWidth: this.options.maxWidth,
     maxHeight: this.options.maxHeight
},

To be honest, I don't know exactly how to remove it in a clean way. The "easy way" would be remapping Magento_Backend/js/media-uploader to a custom js file and brutally copy/paste.

By the way, the above file is called here:
vendor/magento/module-backend/view/adminhtml/templates/media/uploader.phtml

Answer 2

Some clarification:

The upload image size limitation is done in multiple area :

• Upload images on configurable product creation steps:

  vendor/magento/module-configurable-product/view/adminhtml/web/js/variations/steps/bulk.js:317

• Upload image for a product

  vendor/magento/module-backend/view/adminhtml/templates/media/uploader.phtml:17

• Upload image for CMS

  vendor/magento/module-cms/view/adminhtml/templates/browser/content/uploader.phtml:103

• Abstract class with the constant value

  vendor/magento/framework/File/Uploader.php:138

To my mind Magento do not finish to implement correctly this feature because the value is harcoded for the configurable creation.

Answer 3

In Magento 2.2.3 the max image sizes can be found in /vendor/magento/framework/File/Uploader.php