New Technology Reviews!.: a-picture-and

<img alt="" class="aligncenter" height="90" src="http://img695.imageshack.us/img695/3020/main200200.jpg" width="120" /> When IE head Dean Hachamovitch announced the first platform preview of IE 10 at the MIX conference in April he said further preview releases would be "between 8 and 12 weeks apart". Platform Preview 2 arrives after 11 weeks and adds features for web apps, including Drag-drop and File Reader; so you can drag objects around on a web page - look for a magnetic fridge poetry demo on the IE test drive site soon - or drag files into browser windows to upload them and have that happen in the background. File access is possibly the first feature from the HTML5 Labs previews to make it into IE. PP2 also gets the web workers spec. Rob Mauceri, the lead program manager on the IE team, calls that "a popular request from developers" (we count it as the most common request in the IE blog after Flebox, which arrived in PP1) and it's going to make a big difference to the performance of web apps – and maybe your battery life. With web workers, a web app can shift some code to a thread running in the background – so a game can be working out the next turn without slowing you down while you play (usually the JavaScript for that would slow down what you're doing). This should work particularly well in IE because of the way the Chakra JavaScript engine can split code across multiple cores (and Microsoft's latest figures say that as of March 2011, the average PC has 2.4 cores). Other browsers already support web workers, although Firefox 5 does not allow messages sent through a direct 'channel' between different pieces of background code which Microsoft says explains why PP2 does better than Firefox at its new Bellagio Fountain test drive demo. <img alt="IE10" class="aligncenter" height="161" src="http://img840.imageshack.us/img840/2152/bellagioff5242090.jpg" width="252" /> FASTER: IE10 gets Web workers after other browsers… <img alt="IE10" class="aligncenter" height="268" src="http://img52.imageshack.us/img52/929/bellagioff5142090.jpg" width="420" /> FIREFOX 5: …Microsoft says Firefox is slower at this test because it doesn't have message channels PP2 is the first browser to support three new performance APIs, including the Page Visibility setting that the Chrome team has been suggesting web sites use to check if a page is in a background or tab or a minimised window. "If a web app is pinging the server for data it could be doing a lot of work and increasing the cost of running that server, none of which is needed because the window isn't visible to the user," Mauceri explained. The IE team confirmed that IE10 PP2 is "the same HTML5 engine seen in the recent public "Windows 8" demos". One new feature that would explain the snappiness of the interface reflowing as you change the size of windows is Media Query Listeners; instead of the browser having to check periodically to see if you've changed the window size, changing the size sends a message to the server that it's changed and might need a new layout. IE10 PP2 is also the first browser to include CSS3 Positioned Floats (a spec Microsoft recently proposed to the W3C) and Rob Mauceri told us this is "part of the bigger picture of where reading is going online, towards a more print-like experience"; once you have a multi-column page flowing through a grid (all standards added in PP1), you want to be able to position a picture and have the columns flow around it – and that could be useful for web app layouts too. <img alt="IE10" class="aligncenter" height="172" src="http://img98.imageshack.us/img98/2241/bellagioff5442090.jpg" width="252" /> FULL HARDWARE: Using hardware acceleration PP2 shows more fireflies… <img alt="IE10" src="http://img59.imageshack.us/img59/4753/bellagioff5342090.jpg" width="420" /> CHROME: It might run on XP but Microsoft shows Chrome lagging on this demo There are also security improvements for embedding content like maps, ads or feeds form social networks in a web page using iframes; these will now run in a sandbox for extra security (again, something Microsoft tools us Firefox 5 doesn't support). PP2 also adds HTML5 forms and fields that will only accept specific types of information like email addresses or telephone numbers (something Joe Marini first mentioned to us as coming in the Windows Phone version of IE in the Mango update, suggesting that might be a version somewhere between IE9 and IE10). Mozilla evangelist Chris Blizzard recently told us Firefox is "almost as fast as IE9 and faster in some places" and Mike Belshie of the Chrome team showed background tabs in Chrome running faster than in IE9 at the Velocity conference this month (but using more battery to do it) but it looks like Microsoft is keeping up with performance improvements. The IE team isn't afraid to point at problems in other browsers either. <img alt="IE10" class="aligncenter" height="161" src="http://img89.imageshack.us/img89/5622/bellagioff5742090.jpg" width="252" /> COLOURFUL IE10: It's not enough to implement HTML5 if you get it wrong, says Microsoft A demo titled 'how stuff works' (showing an HTML5 Canvas app that works in Chrome and Firefox but displays the wrong colours) could almost be called 'how IE10 works better'. <img alt="IE10" class="aligncenter" height="161" src="http://img687.imageshack.us/img687/7771/bellagioff5642090.jpg" width="252" /> OFF-COLOUR FIREFOX: HTML5 is supposed to cope better with pages that aren't quite perfect – Firefox doesn't seem to manage that as well <img alt="IE10" class="aligncenter" height="161" src="http://img813.imageshack.us/img813/6679/bellagioff5542090.jpg" width="252" /> GREY GOOGLE: Even worse, Chrome gets no colours at all Although Mauceri diplomatically phrases it as "we've made a lot of progress as an industry but there is still work to do". --------------------------------------------------------------------------------------------------

In Depth: What's new in Internet Explorer 10 Platform Preview 2

When IE head Dean Hachamovitch announced the first platform preview of IE 10 at the MIX conference in April he said further preview releases...

A US start-up company is poised to release new camera technology allowing photographers to set the point of focus in their images after taking the picture. California-based Lytro claims it has developed a new camera to be released later this year that uses 'light field' technology to allow photographers to take a picture and set the focus on any point in the picture later on the computer. Creating what it calls interactive 'living pictures,' Lytro says its new technology uses the light field - the amount of light travelling in every direction through every point in space - which conventional cameras cannot record. Using a new kind of sensor called a light field sensor, the company claims its camera "captures the color, intensity and vector direction of the rays of light. This directional information is completely lost with traditional camera sensors, which simply add up all the light rays and record them as a single amount of light." Lytro adds: "By substituting powerful software for many of the internal parts of regular cameras, light field processing introduces new capabilities that were never before possible. Sophisticated algorithms use the full light field to unleash new ways to make and view pictures." The Lytro camera's pictures would allow photographers not only to focus pictures after they are taken, but also shift their perspective of a scene and switch between 2D and 3D views, the company claims.

New camera tech to allow shoot first, focus later

A US start-up company is poised to release new camera technology allowing photographers to set the point of focus in their images after taki...