Image

[cefer]

Using basilisk for shopping, some images appear rotates (turned 90 degrees left or right) when in others web navigators (edge, firefox, waterfox, and others) the images appear in different position

For example, point to:

http://www.magnoshop.com/1-start.php?ce ... o=parlante

http://www.magnoshop.com/1-start.php?ce ... o=sombrero

http://www.magnoshop.com/1-start.php?ce ... tulo=termo

Using Archlinux updated to 20230708

[Moonchild]

If the website wants browsers to extract the JPEG orientation from the image's meta-data (EXIF), they should indicate this with the following CSS rule:

Code: Select all

image-orientation: from-image;

This website doesn't do that - as a result, the browser will display the image in its native orientation.

[FranklinDM]

The spec was changed (csswg-drafts#3799) and they switched the default value of the image-orientation property from none to from-image, which is likely why this site doesn't explicitly set that property.

[Moonchild]

The approach that images should always be rotated according to EXIF and the developers can use image-orientation:none if they want to disable this behaviour doesn't always work. This is because image-orientation is only applied if the element is in the DOM (as noted in the Chromium bug about this change). For image and canvas elements that are not in the DOM, currently no method exists to disable auto-rotation according to EXIF, removing control over images by webmasters who may want to use native.

Another problem with that is that opaque requests can no longer use image-orientation:none because of a security/privacy issue with reading and responding to EXIF data by default, so approaching this from the "don't implicitly extract meta data" side will provide a website with full control over the image. New spec implementations will not be able to override the image orientation and using the native orientation when they want, unless they complicate matters a lot by using CORS headers and what not.

So, I really don't want to follow what they have done there. Asking webmasters to explicitly indicate if they want to read EXIF data (especially from remote sources) before anything is rendered is IMHO the proper and sane solution.

[Basilisk-Dev]

I'm definitely don't like the idea of using EXIF data for image rotation. Every time I think developers of "modern" sites can't make ruin the web any further than they have they somehow continue to do it anyways.

[Moonchild]

The image decoder and display in the platform does use it for stand-alone images by default (it makes sense there).