Resizing the container of a CSS-transformed image to match its dimensions. (Twitter Bootstrap)

Currently working on a new project using Twitter Bootstrap. The main focus is on a thumbnail gallery, similar to the examples provided by Bootstrap (found here: ).

The issue I am facing involves applying css transformations, particularly rotations, to images based on their EXIF orientation data. When I rotate an image (using -webkit-transform for testing in Chrome), the parent element of the image remains the same, causing the image to "overflow" its container.

In Chrome, you can replicate this behavior by visiting the example thumbnail gallery link mentioned earlier, inspecting one of the placeholder images, and adding a 

style="-webkit-transform: rotate(90deg)"
property to the img tag. This causes the image to overflow the li container and disrupt the layout.

Is there a solution to have bootstrap recognize a css-rotated image as if it were originally that way? One idea was manually setting the height and width of the img tag, but since the server-side rendering size is unknown beforehand, this approach seems impractical.

Although rotating the images on the server-side is possible, I strongly prefer achieving this effect in the browser.

Any suggestions or ideas would be greatly appreciated!

EDIT: A suggestion was made to rotate the entire container, however, this method would also rotate any text nodes inside the thumbnail lis which is not desirable.

csstwitter-bootstrapcss-transformswebkit-transform

Answer №1

If you're looking for a solution to image rotation based on EXIF data using CSS, the image-orientation: from-image property is the way to go.

You can find more information at

The introduction of the CSS image-orientation property in Firefox 26 has provided a solution to various image orientation challenges. By applying the style image-orientation: from-image to a JPEG image, the browser will consider its EXIF orientation tag during layout and rendering. This makes it possible for smartphone and digital camera images to be displayed correctly by simply adding a single CSS property!

Take a look at the first image in this article with image-orientation applied. Users of Firefox 26 will see the image displayed as intended, with the sky at the top and the ground at the bottom.

Answer №2

Alright, in that situation it's best to implement it as follows:

<ul>
<li class="span3 cw rotated">
    <div class="thumbnail">
        <img src="http://placehold.it/200x180" alt="">
        <div class="caption">
            <h5>Thumbnail label</h5>
            <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
            <p><a href="#" class="btn btn-primary">Action</a> <a href="#" class="btn">Action</a></p>
        </div>
    </div>
</li>


.cw img{
  -webkit-transform: rotate(90deg);
  height: 210px; /* Width of container - padding (Height is now width since the image is rotated.) */
}
.ccw img{
  -webkit-transform: rotate(-90deg);
  height: 210px; /* Width of container - padding (Height is now width since the image is rotated.) */
}

​ Take a look at the fiddle: http://jsfiddle.net/dGgrG/4/

The downside is that the max-width feature in Bootstrap might distort your aspect ratio. This issue can arise when utilizing the Bootstrap grid system. You could either override it with CSS or consider using JavaScript as a potential solution.

To address this with JS, refer to these two helpful discussions:

Get the real width and height of an image using JavaScript? (in Safari/Chrome)

Implementing jQuery resize while maintaining aspect ratio

Answer №3

Applying the rotation to the container, rather than the image, is recommended.

http://jsfiddle.net/amy/qRgkH/2/

One issue you may encounter is that the rotation is based on the image's original position.

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