Category: Wayland

  • November 4, 2016 - Chris Michael

    Ecore_Wl2: An EFL Library for Wayland Applications

    Throughout the years of developing Wayland support for EFL, few EFL libraries have had as much impact on EFL Wayland applications as the Ecore_Wayland library has. This library was one of the first to make it possible to truly run EFL applications in a Wayland environment. As the years progressed, it became apparent that Ecore_Wayland had some shortcomings; this blog post will introduce you to the replacement for Ecore_Wayland, called Ecore_Wl2. Ecore_Wayland’s Shortcomings While testing our first Wayland implementation, it became apparent that the initial implementation of the Ecore_Wayland library had some drawbacks. Publicly exposed structures could not be changed easily without breaking existing applications, and any changes to existing Wayland protocols would require significant changes to our Ecore_Wayland library. It was also discovered that when an EFL Wayland application creates a new window, the backend library also creates an entirely new display and connection to the Wayland server. This […]

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  • November 3, 2016 - Bryce Harrington

    Compose Key Support in Weston

    I recently added support to Weston for compose sequences via the configured compose key. This is now available in all of the Weston clients. What are “compose sequences”? Let’s say I need to write to someone named Zoë, but I don’t have an “ë” key on my keyboard. I can create the letter using separate key strokes:

    The first key, RAlt (the Alt key on the right side of the keyboard), is the compose key (also called the Multi-key). It signals that a compose sequence is beginning. The next key is double-quote, constructed by holding one of the Shift keys while pressing the single-quote key. Third we type the letter e. This completes the sequence. Or, more correctly, the system finds a match for this sequence in a table of available sequences, and thus considers it finished. The entry in the table indicates that the ‘ë’ symbol should be […]

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  • October 27, 2016 - Bryce Harrington

    The Basics of Input Methods in Weston

    Wayland provides an optional protocol, zwp_input_method, for defining alternate ways of sending keystrokes and mouse activity to clients. This could be things such as an onscreen keyboard or a popup for building Korean characters. The design of the protocol allows for different kinds of input methods to be made available via modular plugins, allowing them to be coded as discrete client applications, separate from the compositor’s core. The Wayland project maintains a reference compositor named Weston that provides implementations of the various protocols for demonstrative purposes, including two implementations of the zwp_input_method protocol. One input method, weston-keyboard, manages an on-screen keyboard that pops up at the bottom of the screen, similar to on-screen keyboards typically seen on touch-based mobile devices. The other input method, weston-simple-im, enables a compose key functionality. The user can configure which input method to use via their weston.ini file. No more than one input method can […]

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  • October 26, 2016 - Chris Michael

    Ecore_Drm2: How to Use Atomic Modesetting

    In a previous article, I briefly discussed how the Ecore_Drm2 library came into being. This article will expand on that article and provide a brief introduction to the Atomic Modesetting and Nuclear Pageflip features inside the new Ecore_Drm2 library. What Makes Atomic Modesetting and Nuclear Pageflip so Great? For those that are unaware of what “modesetting” is, you may read more about it here. Atomic Modesetting is a feature that allows for output modes (resolutions, refresh rate, etc) to be tested in advance on a single screen or on multiple outputs. A benefit of this feature is that the given mode may be tested prior to being applied. If the test of a given output mode fails, the screen image doesn’t need to be changed to confirm a given mode works or not, thus reducing screen flickering. Atomic/Nuclear Pageflipping allows for a given scanout framebuffer object and/or one or more hardware […]

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  • October 7, 2016 - Chris Michael

    Introducing the New & Improved Ecore_Drm2 Library

    In the early days of developing Wayland support in EFL/Enlightenment, it was quickly apparent that EFL would need an abstraction library to interface with libdrm. We wanted users of EFL to be able to call simple functions without having to know about the underlying internals of libdrm, thus the original Ecore_Drm library was born. First, efforts to develop this library were undertaken with much enthusiasm and little fan-fare. After the birth of Ecore_Drm, we then proceeded to integrate it’s usage into some new Evas and Ecore_Evas engines so that the Enlightenment Desktop Shell could make use of it and render our first standalone Wayland desktop implementation. After kicking the tires of our Wayland desktop for a while, we came to realize some shortcomings of the existing Ecore_Drm implementation. For starters, it would create it’s own Ecore_Drm_Device structure when launching the Enlightenment Wayland desktop (this structure was a representation of the […]

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  • September 20, 2016 - Bryce Harrington

    What’s New in Wayland and Weston 1.12?

    The 1.12 release of the Wayland core protocol and its reference compositor Weston will be later today; this post will give an overview of the major changes since the last release. New Features and Improvements to Wayland The Wayland core protocol documentation has received numerous refinements to improve its clarity and consistency. Along with this, many blank areas of the protocol documentation have been fleshed out. A new wl_display_add_protocol logger API provides a new, interactive way to debug requests; along with this are new APIs for examining clients and their resources. This is analogous to using WAYLAND_DEBUG=1, but more powerful since it allows run time review of log data such as through a UI view. There have been improvements to how the protocol XML scanner handles version identification in protocol headers. This enables better detection and fallback handling when compositors and clients support differt versions of their protocols. New Features […]

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  • September 6, 2016 - Reynaldo Verdejo

    Wayland Uninstalled, the Easy Way

    I recently had to start looking at some GStreamer & Wayland integration issues and, as everyone would, commenced by trying to setup a Wayland development environment. Before getting my feet wet though, I decided to have a chat about this with Derek Foreman: our resident Wayland expert. This isn’t surprising because on our team, pretty much every task starts by having a conversation (virtual or not) with one of the field specialists in the group. The idea is to save time, as you might have guessed. This time around I was looking for a fairly trivial piece of info: Me – “Hey Derek, I have Wayland installed on my distro for some reason – I don’t really want to take a look at now – and I would like to setup an upstream (development) Wayland environment without messing it up. Do you have some script like GStreamer’s gst-uninstalled so I can perform […]

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  • July 6, 2016 - Bryce Harrington

    Wayland’s Upcoming Idle Behavior Inhibition

    The Inhibited Wayland Desktop – Part 2 This article is part two of a two part series on screen inhibition in Wayland. Part 1 can be read here. In the first part of this blog series, I drilled into how screensaving, screen power management, and locking are designed to work in the Wayland protocol and how Weston implements the functionality. Now it’s time to take a look at the newly-proposed idle behavior inhibition. Idle inhibition enables client applications to disable the idle behavior from being triggered while the application is running. For compositors that support this protocol extension, clients can make an API call to create an ‘inhibitor object’ associated with one of their surfaces. The inhibition request lasts for this object’s lifetime, so if the client exits, crashes, deletes the inhibit object or the surface, or otherwise becomes invalid, the screensaver will be restored to its normal state. The […]

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  • June 23, 2016 - Bryce Harrington

    Introducing Wayland Screen Inhibition

    The Inhibited Wayland Desktop – Part 1 This article is part one of a two part series on screen inhibition in Wayland. Picture this: you’re giving a presentation where you’re digging deep into some fascinating detail, when suddenly, your screensaver pops on.  Quickly, you rush back to your laptop to tap the keyboard or wave the mouse to hide the pictures of your cat and bring your presentation back. Now, where were you?  You’ve lost your train of thought, to the audience’s bemusement and to the detriment of your presentation. Or, imagine this: you’re watching a movie on your cell phone or tablet while on battery power, and you’re constantly frustrated when the screen dims or goes black every 5 minutes. I’m sure many of you have had problems just like these, and the generally accepted solution for these issues is to temporarily inhibit power saving mode as well as […]

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  • June 15, 2016 - Chris Michael

    Elput: A Libinput Abstraction for EFL

    Input is something generally taken for granted, but it’s not without issues. While working on a new EFL library for Direct Rendering, the community decided that having the same libinput code duplicated across multiple internal subsystems like Ecore_Fb, Ecore_Drm, etc. would be a great effort to maintain in the future. To reduce this effort, Elput was created. Introducing Elput Elput is a library designed to abstract all the gory details of using libinput, and it provides a central API that can be used to initialize, iterate, and manipulate various input devices found on a system. These can include keyboards, pointers, touch screens, and any other input device that libinput supports. Elput is also multi-seat aware, meaning that when a new input device gets attached to the system and belongs to a different seat, Elput will automatically create a new seat internally and do any setup required for that new input […]

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