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Mozilla: Firefox Extensions, WebRender, ARCore and Arkit, Privacy

Submitted by Roy Schestowitz on Thursday 3rd of January 2019 02:23:15 PM Filed under
Moz/FF
  • [Firefox] January’s featured extensions
  • WebRender newsletter #34

    Happy new year! I’ll introduce WebRender’s 34th newsletter with a rather technical overview of a neat trick we call primitive segmentation. In previous posts I wrote about how we deal with batching and how we use the depth buffer both as a culling mechanism and as a way to save memory bandwidth. As a result, pixels rendered in the opaque pass are much cheaper than pixels rendered in the blend pass. This works great with rectangular opaque primitives that are axis-aligned so they don’t need anti-aliasing. Anti-aliasing, however, requires us to do some blending to smoothen the edges and rounded corners have some transparent pixels. We could tessellate a mesh that covers exactly the rounded primitive but we’d still need blending for the anti-aliasing of the border. What a shame, rounded corners are so common on the web, and they are often quite big.

    Well, we don’t really need to render whole primitives at a time. for a transformed primitive we can always extract out the opaque part of the primitive and render the anti-aliased edges separately. Likewise, we can break rounded rectangles up into smaller opaque rectangles and the rectangles that contain the corners. We call this primitive segmentation and it helps at several levels: opaque segments can move to the opaque pass which means we get good memory bandwidth savings and better batching since batching complexity is mostly affected by the amount of work to perform during the blend pass. This also opens the door to interesting optimizations. For example we can break a primitive into segments, not only depending on the shapes of the primitive itself, but also on the shape of masks that are applied to it. This lets us create large rounded rectangle masks where only the rounded parts of the masks occupy significant amounts of space in the mask. More generally, there are a lot of complicated elements that can be reduced to simpler or more compact segments by applying the same family of tricks and render them as nine-patches or some more elaborate patchwork of segments (for example the box-shadow of a rectangle).

  • ARCore and Arkit: What is under the hood : Anchors and World Mapping (Part 1)

    Some of you know I have been recently experimenting a bit more with WebXR than a WebVR and when we talk about mobile Mixed Reality, ARkit and ARCore is something which plays a pivotal role to map and understand the environment inside our applications.

    I am planning to write a series of blog posts on how you can start developing WebXR applications now and play with them starting with the basics and then going on to using different features of it. But before that, I planned to pen down this series of how actually the "world mapping" works in arcore and arkit. So that we have a better understanding of the Mixed Reality capabilities of the devices we will be working with.

  • Rabimba: ARCore and Arkit, What is under the hood: SLAM (Part 2)

    In our last blog post (part 1), we took a look at how algorithms detect keypoints in camera images. These form the basis of our world tracking and environment recognition. But for Mixed Reality, that alone is not enough. We have to be able to calculate the 3d position in the real world. It is often calculated by the spatial distance between itself and multiple keypoints. This is often called Simultaneous Localization and Mapping (SLAM). And this is what is responsible for all the world tracking we see in ARCore/ARKit.

  • India attempts to turn online companies into censors and undermines security – Mozilla responds

    Last week, the Indian government proposed sweeping changes to the legal protections for “intermediaries”, which affect every internet company today. Intermediary liability protections have been fundamental to the growth of the internet as an open and secure medium of communication and commerce. Whether Section 79 of the Information Technology Act in India (under which these new rules are proposed), the EU’s E-Commerce Directive, or Section 230 of the US’ Communications Decency Act, these legal provisions ensure that companies generally have no obligations to actively censor and limited liability for illegal activities and postings of their users until they know about it. In India, the landmark Shreya Singhal judgment had clarified in 2015 that companies would only be expected to remove content when directed by a court order to do so.

  • Kenya Considers Protection of Privacy and Personal Data

    Mozilla applauds the government of Kenya for publishing the Data Protection Bill, 2018. This highly anticipated bill gives effect to Article 31 of the Constitution of Kenya, which protects the right to privacy, and, if passed, will be Kenya’s first data protection law.

»

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