Screencast #133: Figuring Out Responsive Images. Picturefill 2.0: Responsive Images And The Perfect Polyfill. Advertisement Not since the early days of web standards have I seen our community rally around a seemingly small issue: responsive images.
Over the last four years (yeah, it’s been about four years), we’ve seen many permutations of images in responsive design. From the lazier days of setting max-width: 100% (the absolute minimum you should be doing) to more full-featured JavaScript implementations, such as Picturefill and Zurb’s data-interchange method, we’ve spent a lot of time spinning our wheels, banging our heads and screaming at the wall. I’m happy to say that our tireless journey is coming to a close. The W3C and browser makers got the hint. The State Of Responsive Images In our search for the holy grail of serving the right image to the user, our attitude towards browser makers until now has largely been, “Forget you — we’ll do it ourselves.”
The difference between a CSS transition and a responsive image is, of course, how they degrade. That really isn’t the case with images. Responsive Images: Experimenting with Context-Aware Image Sizing. High DPI Images for Variable Pixel Densities. Introduction One of the features of today's complex device landscape is that there's a very wide range of screen pixel densities available.
Some devices feature very high resolution displays, while others straggle behind. Application developers need to support a range of pixel densities, which can be quite challenging. On the mobile web, the challenges are compounded by several factors: Large variety of devices with different form factors.Constrained network bandwidth and battery life.
In terms of images, the goal of web app developers is to serve the best quality images as efficiently as possible. Responsive Images Community Group. Meeting report On Tuesday, the 10th September, 2013 various W3C members and folks from the developer community got together at Mozilla’s Paris offices to try to agree on a way forward for responsive images.
As no official minutes were taken during the meetup, this meeting summary is based on the following unofficial notes and blog posts from attendees: Many thanks to the authors above for allowing their text to be reused here. Meeting outcomes Browser vendors agree that srcset + DPR-switching is the right initial step forward (i.e., the 2x, 3x, etc. syntax). What the meeting was about. Wilto/picturefill-proposal. Scottjehl/picturefill. Picturefill. For more info: see project home.
This markup pattern is further detailed in the original proposal by Florian Rivoal. This syntax combines the resolution switching of srcset with picture’s ability to tailor sources to the viewport. Brett Jankord – Cross Browser Retina/High Resolution Media Queries. Fantasai, Ben Frain, and Peter Gasston have all written about this topic before, though I still see a lot developers using verbose media queries for retina/high resolution displays so I figured I would write up my own post.
Most developers are currently writing retina/high resolution media queries similar to the examples below: This media query example is from 37signals article on retina images and scss. It is based on the one in Thomas Fuchs’ Retinafy book but, it has been modified to define the Google Nexus 7 with it’s 1.3 pixel ratio as a retina-capable device. @media (min--moz-device-pixel-ratio: 1.3), (-o-min-device-pixel-ratio: 2.6/2), (-webkit-min-device-pixel-ratio: 1.3), (min-device-pixel-ratio: 1.3), (min-resolution: 1.3dppx) { /* Retina-specific stuff here */ } Chris Coyier has a retina display media query example that looks like this: What’s wrong with the above solutions Nothing really, though they could be a lot cleaner. Responsive images: what's the problem, and how do we fix it? By Matt Wilcox Introduction Responsive images is a surprisingly complicated topic, and one that's been steadily gaining attention over the last year as more developers discover they need them and then discover there's no good solution yet.
This article aims to give an overview of the problem itself, and show the different proposals in the works to address it. So, grab a brew, buckle up, and set your brain to concentrate — there's only so much condensing of a year's effort and thought an author can do... Responsive image context First of all we need to establish some context: what is it we want to do, and why? Display dimensions Display quality (pixel density, colour capability) Connectivity (network conditions) Input types (touch, mouse, keyboard) By adapting a design to these conditions we aim to provide the best clarity of content, ease of use, load times, and device performance for any given user. How this is done is managed differently in the three different languages of the web. Adaptive Images in HTML. Joshje/Responsive-Enhance ? GitHub. Retina graphics for your website.
How it works When your users load a page, retina.js checks each image on the page to see if there is a high-resolution version of that image on your server.
Designing for the Retina display. Website-Bilder für das Retina Display optimieren. Erstellt man Websites und betrachtet sie zum ersten Mal z.B. auf einem iPhone 4/4s, stellt eventuell man fest: Manche Bilder sind irgendwie nicht richtig scharf!
Die Ursache ist einfach erklärt: Im Falle der Apple-Geräte (ab iPhone 4) haben diese das sogenannte Retina-Display mit sehr hoher Pixeldichte, die „normale” Bilder vergleichweise unscharf aussehen lässt, wenn man diese mit „optimierten” Bildern vergleicht. Im Folgenden deshalb zwei Möglichkeiten, wie man recht einfach Bilder mit höherer Auflösung integrieren kann, die dann deutlich besser aussehen.