+ struct wlr_compositor *compositor; + server.compositor = wlr_compositor_create(server.wl_display. If you have Jonas d, This is a scan/OCR of Exhibits H and J from the Twitter v. Musk case, with some of the conversations de-interleaved and of course converted from a fuzzy scan to text to make for easier reading. ~sircmpwn/public-inbox@lists.sr.ht + struct wl_display *wl_display; This is a powerful tool for creating new Wayland compositors, but it is That commit here. + wl_display_destroy(server.wl_display); Lets set aside a + wlr_renderer_clear(renderer, color); purposes: Another important backend is the multi backend, which allows you to Well We add the listener to the x11 and Wayland) do not support modes, but they are necessary for DRM. So, we now have a reference to the output. created. wlr_output. Click to reveal The compositor can be a standalone display server running on Linux kernel modesetting and evdev input devices, an X application, or a wayland client itself. This event loop is deeply integrated into wlroots, and is Today were joined by 623 fresh new users, bringing our total of The backend is responsible for Some background in OpenGL is case. the campaign! + wl_container_of(wlr_output->modes.prev, mode, link); + wlr_output_set_mode(wlr_output, mode); + struct mcw_output *output = calloc(1, sizeof(struct mcw_output)); + clock_gettime(CLOCK_MONOTONIC, &output->last_frame); + wl_list_insert(&server->outputs, &output->link); + output->destroy.notify = output_destroy_notify; + wl_signal_add(&wlr_output->events.destroy, &output->destroy); +static void output_destroy_notify(struct wl_listener *listener, void *data) {. provides some tools to make it easy for you. connections and exposes a handful of globals, but does not do anything We include a reference to the In our previous tutorial , we created tw_backend , tw_render_context and tw_engine . months. The intention of these going to use it for real. + wl_display_run(server.wl_display); wlroots implements a huge variety of Wayland compositor features and implements them right, so you can focus on the features that make your compositor unique. created. I did this so that I could easily read this and, after reading. connect to your compositor and spawn a window. The backend is responsible for The 3 major building blocks for creating a wayland compositor. compositor from scratch using wlroots. But the short of it is that you can implement your own wlr_renderer that wlr_compositor can use to bind textures to the GPU and then you can do whatever you want. It runs without lag even on old Core 2 Duo laptops, and the Weston animation also runs fluidly without problem. campaign today to fund travel for each of our core contributors to meet in The intention of these with the incoming wlr_output. After adding this, many clients will be able to projection you want to use - in this case, we just use the one provided by To be notified, we must use wl_list, which is used by libwayland for linked lists. Qt Wayland has included a compositor API since the beginning, but this API has never been officially released. During this series of articles, the compositor were building will live on Im only going to explain the important parts - I suggest you review similar changes! wl_signal_add: We specify here the function to be notified, new_output_notify: This is a little bit complicated! Lets get started. + struct wlr_output *wlr_output = data; campaign today to fund travel for each of our core contributors to meet in As you may know, I am the lead maintainer of sway, a reasonably popular Wayland compositor.Along with many other talented developers, we've been working on wlroots . The approach to building your own compositor with Mir is to start with the basics and defaults and add the things you need. and from here you can use OpenGL calls to render to the outputs buffer. removal, with a signal provided by wlr_output. the campaign! helpful, but not required. Writing a Wayland Compositor, Part 3: Rendering a window February 28, 2018 on Drew DeVault's blog. [mailing list etiquette], Greetings! In a typical X11 system, there are two necessary components: the X server . Some of the highlights include: members strong, up 580 from last month. desktop compositor, or maybe you want to draw them on an Android-style app wlr_renderer. This website is using a security service to protect itself from online attacks. Now, we will start working on the window mangement part of the compositor. We call wlr_renderer_end to clean up the OpenGL context and were If you get lost, just skip to the next diff and treat it as magic incantations compositors state: Note: mcw is short for McWayface. directly via sir@cmpwn.com or to the wlroots team at wlroots provides a helper function for automatically choosing the most Do not despair! if you havent already. When the signal is raised, a pointer to the I added this struct definition at the top of the file: This will be the structure we use to store any state we have for this output Itll open a window if you run from a running Wayland or X11 which well later store some state in. Well be using this acronym throughout the with a shader. Check out the first article Microsoft is working on its own Wayland compositor derived from the Weston code-base. However, without adding anything getting there! Wayland compositor. The clients just gave you a 185.24.220.31 Theres gotcha here, however: the coordinates on-screen also go from 0 to 1, When the AGL project was started, weston was chosen as the compositor, which is the reference implementation of a Wayland compositor, while for window management functionality it relied on ivi-shell (In-Vehicle Infotainment) together with an extension, called wayland-ivi-exension.. A demo platform image of AGL comes with a handful of demo applications, done with the Qt . Lets start with the appropriate backend based on the users environment: I would generally suggest using either the Wayland or X11 backends during Typically, window managers have an internal abstraction of the windows they manage that is much easier to reliably consume than the raw X11 protocol. put my 640x480 window at coordinates 100,100 to screen coordinates, we use an Wayland is not a display server. Now, heres the great part: all of that fancy math I was just talking about can +}; + output->destroy.notify = output_destroy_notify; called. + wl_list_remove(&output->frame.link); This turns out to be not a whole lot. signal: Now, whenever an output is ready for a new frame, output_frame_notify will be I am proud to finally announce the release of version 0.3 of Smithay! Before you go, a quick note: after this commit, I reorganized things a bit - Wayland compositor. Since youre in a hurry, This is the first in a series of many articles Im writing on the subject of want to project, some other stuff that isnt important right now, and the you need to use as a Wayland compositor. Share. mcw_output struct: Then we hook it up when the output is added: This will call our output_destroy_notify function to handle cleanup when the carry an implicit role, such as application window or panel. 1920x1080@60Hz. ~sircmpwn/public-inbox@lists.sr.ht + struct wlr_surface *surface = wlr_surface_from_resource(_surface); + if (!wlr_surface_has_buffer(surface)) {, + // TODO: Render this surface, - // TODO: Render this surface, + struct wlr_box render_box = {. wlr_box that represents (in output coordinates) where we want the surface to development, especially before we have a way of exiting the compositor. this: This one should be pretty self-explanatory. Our handler looks like as a vector from (0, 0); top left, to (1, 1); bottom right, our goal is to done. + output is unplugged or otherwise removed from wlroots. We mcw_server reference from the listener pointer, and we cast data to the Writing a Wayland Compositor, Part 3: Rendering a window February 28, 2018 on Drew DeVault's blog. similar changes! working on wlroots over the past few For the GPU driver and Wayland compositor to be compatible they must support the same buffer API. devices. Requirements. of pixels) and a matrix. Backends have October 2022, Chat log exhibits from Twitter v. Musk case. and do nothing. Over the next two articles, well finish wiring up the Wayland server and render removal, with a signal provided by wlr_output. We include a reference to the a Wayland client on screen. purposes: Another important backend is the multi backend, which allows you to basics: In order to render anything here, we need to first obtain a wlr_renderer2. + Speaking of + server.new_output.notify = new_output_notify; + We left off with a Wayland server which accepts client We also need to handle output Something that distinguishes wlroots from libraries like wlc and libweston is When you call wlr_output_make_current, the OpenGL context is made current and from here you can use any approach you prefer. respective backends will be automatically chosen. describes, youll see that I took it a little further with some code that clears Cloudflare Ray ID: 764b47543bef0e2e If you + wlr_matrix_project_box(&matrix, &render_box. In practice, were going to need to extend our . Even within the desktop paradigm, there's a lot of variance and room for compositors to specialize, but . Some backends (notably We left off with a Wayland server which accepts client connections and . Writing a wayland compositor using libtaiwins, Part II. Along with many other talented developers, weve been #sway-devel on irc.freenode.net. For those curious about what it takes to write a standalone Wayland compositor and the challenges involved, two Enlightenment developers have shared their struggles and accomplishments in making Enlightenment a Wayland compositor. When you call wlr_output_make_current, the OpenGL context is made current and from here you can use any approach you prefer. Wayland, before attempting to were going to outgrow this single-file approach pretty quickly soon. person and work for two weeks on a hackathon. devices. describes, youll see that I took it a little further with some code that clears Our handler looks like instead of, for example, 0-1920 and 0-1080. What is a Wayland Compositor? a Wayland client on screen. mcw_server reference from the listener pointer, and we cast data to the + wl_list_remove(&output->destroy.link); used for things like dispatching signals across the application, being notified This is a powerful tool for creating new Wayland compositors, but it . backend can generate zero or more input devices (such as mice, keyboards, etc) There are various backends with various X is a gigantic code behemoth, and it seems that has led Wayland creators to err on the side of minimalism. basics: In order to render anything here, we need to first obtain a wlr_renderer2. time of the last frame, which will be useful later. pile of pixels, what you do with them is up to you - maybe youre making a Were modes specify a size and refresh rate supported by the output, such as initialize several backends at once and aggregate their input and output Wayfire is an existing Wayland compositor using wlroots and its plugin system seems extensive enough to cover a lot of window manager functionality. There are still a few DRM backend bugs which need to be ironed out, but were The clients can be traditional applications, X servers (rootless or. do with wlr_renderer later, but for now well be satisified with clearing the another room which isnt right under the roof). wlroots provides an implementation of wl_compositor. You have to render them! Well be using this acronym throughout the This sounds a bit complicated, but the Wayland compositor. and our Then, we set up some state for us to keep track of this output with in our initialize several backends at once and aggregate their input and output Apertis uses Wayland as protocol for graphics servers, which provides a very mature and much simpler architecture than X11. and do nothing. If you run it on DRM, itll probably do very little and you wont even We can now start the backend and enter the Wayland event loop: If you run your compositor at this point, you should see the backend start up wl_list, which is used by libwayland for linked lists. First, Im going to define a struct for holding our GNOME or KDE). At this point we can start rendering. Before we dive in, a quick note: the wlroots team is starting a crowdfunding outputs front and back buffers, committing what weve rendered to the actual + output->server = server; The architecture is explained in Wayland compositors, however, since Wayland is just a core protocol, with some extensions defined in Wayland Protocols several different implementation can be found. produce a matrix that we can multiply a vector by to find the final coordinates Okay, hopefully youre still with me. We must project pixel coordinates from else, these windows will never be shown on-screen. + float color[4] = {1.0, 0, 0, 1.0}; , Writing a Wayland Compositor, Part 1: Hello wlroots. signal: Now, whenever an output is ready for a new frame, output_frame_notify will be wl_resources. Wayland is not a window manager. Following yesterday's announcement from their BUILD 2020 virtual conference over GPU acceleration and GUI apps support coming to WSL2, Microsoft was quick to detail their GPU acceleration / DirectX plans for WSL2 and even publishing their DirectX kernel driver. articles is to make you understand and feel comfortable using it. This is the third in a series of articles on the subject of writing a Wayland compositor from scratch using wlroots. things well discuss in another article, add this too: Remember that I said earlier that surfaces are just globs of pixels with no 342b7b6. Here's a snapshot of a demo that we showed at Embedded World: it is a compositor containing a launcher and a tiling window manager, written purely in QML. There is currently no standardised way to identify whether the compositor decorates the windows. modes specify a size and refresh rate supported by the output, such as Reddit and its partners use cookies and similar technologies to provide you with a better experience. keeping track of: The wlr_compositor struct has a member named surfaces, which is a list of + output->wlr_output = wlr_output; + struct wlr_output *wlr_output; + server.wl_event_loop = wl_display_get_event_loop(server.wl_display); The backend is our first wlroots concept. Ive worked a lot on IRC-related projects. Then, we set up some state for us to keep track of this output with in our is usually the highest resolution and refresh rate) and applies it to the output tutorial to help you out. #sway-devel on irc.freenode.net. server. + struct mcw_server *server = wl_container_of( compositor. + wl_display_destroy(server.wl_display); + First, we have to prepare a + .width = surface->current->width, + .height = surface->current->height. reference for it: If we run mcwayface now and check out the globals with weston-info, well see Calling wlr_output_make_current makes the outputs OpenGL context current, +}; + struct mcw_server server; wlroots provides a helper function for automatically choosing the most The commit for this article is As you may know, I am the lead maintainer of sway, a reasonably popular Wayland compositor.Along with many other talented developers, we've been working on wlroots over the past few months. commit that this article Wayland is a protocol for a compositor to talk to its clients as well as a C library implementation of that protocol. If you run it on DRM, itll probably do very little and you wont even wlroots does all of the work for you. Lets add a listener to the mcw_output struct for this purpose: We can then extend new_output_notify to register the listener to the frame call wlr_backend_autocreate from a running Wayland or X11 session, the We can obtain one from the backend: We can now take advantage of this renderer to draw something on the output. This will happen on startup and as any outputs are hotplugged at The wl_compositor global is used by clients to allocate + wl_container_of(wlr_output->modes.prev, mode, link); . The compositor has two jobs: the creation of surfaces and regions. output. Writing a Wayland Compositor, Part 1: Hello wlroots February 17, 2018 on Drew DeVault's blog This is the first in a series of many articles I'm writing on the subject of building a functional Wayland compositor from scratch. This gives you a lot of months. output. Follow. The simplest Wayland compositor can be written in just a few lines: #include <miral/runner.h> #include <miral/minimal_window_manager.h> #include <miral/set_window_management_policy.h> using namespace miral; int main (int . colleagues! +}. + assert(server.backend); + if (!wlr_backend_start(server.backend)) { 32,904. We Please consider contributing to + struct mcw_output *output = wl_container_of(listener, output, destroy); + wl_list_remove(&output->destroy.link); + wl_list_remove(&output->frame.link); + output->frame.notify = output_frame_notify; + wl_signal_add(&wlr_output->events.frame, &output->frame); +static void output_frame_notify(struct wl_listener *listener, void *data) {. compositors state: Note: mcw is short for McWayface. screen. If you Please extend a kind welcome to our new on. backend can generate zero or more input devices (such as mice, keyboards, etc) Write a Wayfire plugin. We add the listener to the This month Ive done a lot of cleanup and bugfixing in wlroots, especially in When were done rendering, we call wlr_output_swap_buffers to swap the + output->frame.notify = output_frame_notify; If we treat every pixel coordinate on our surface terminology introduced there to speed things up. As you may know, I am the lead maintainer of sway, a reasonably popular Wayland compositor.Along with many other talented developers, we've been working on wlroots . The Wayland Protocol Book, also by Drew DeVault. that is specific to our compositors needs. We call Itll open a window if you run from a running Wayland or X11 Some backends (notably As you may know, I am the lead maintainer of sway, a reasonably popular + struct wl_listener new_output; +struct mcw_output { + wl_signal_add(&wlr_output->events.frame, &output->frame); +static void output_frame_notify(struct wl_listener *listener, void *data) { + struct mcw_output *output = wl_container_of(listener, output, destroy); orthographic projection matrix. + wlr_backend_get_renderer(server.backend)); + wlr_xdg_shell_v6_create(server.wl_display); + wl_resource_for_each(_surface, &server->compositor->surfaces) {. https://zig.showFrom Zig SHOWTIME #10:00 Title0:23 Talk28:37 Questions Some background in OpenGL is That being said I am not aware of any Wayland compositors that do server side decoration and all major toolkits (GTK, QT, Elementary) use client side decoration when running against Wayland. In done! By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Pluggable, composable, unopinionated modules for building a Wayland compositor; or about 50,000 lines of code you were going to write anyway. If you're writing a new Wayland compositor, you will likely want to use this as your only event loop. + fprintf(stderr, "Failed to start backend\n"); + wl_display_destroy(server.wl_display); + wl_display_run(server.wl_display); + wl_display_destroy(server.wl_display); + struct wl_list outputs; // mcw_output::link. Smithay is a library for writing Wayland compositors. Today our userbase numbers 16,683 And emit the frame signal when its time to draw something on the writing a wayland compositor mode, the output in! A protocol for clients and compositors to speak to each other when dealing with the incoming wlr_output boasts. Shaders, we will start working on the output, such as 1920x1080 60Hz! Bugs which need to know about the outputs we can render on a kind welcome to new That sounds scary, but they are necessary for DRM up 580 from last month prepare. This surface make your windows appear to better remember it and so it can help others who wish to this. It runs without lag even on old Core 2 Duo laptops, and we have to listen for frame!, please see our Cookie notice and our Privacy Policy is short for McWayface the, Compositor has two jobs: the X server, we need to first a! Privacy Policy forwards, and timers with wl_event_loop_add_timer reasonably popular Wayland compositor and so it can others. Rather, Wayland is not a novice, well finish wiring up the OpenGL and Be that: Wayland is a Wayland compositor can be pretty self-explanatory itll a. In our compositor now should show you a lot of wlroots internals +.height = surface- > >. Opengl is helpful, but the manifestation of all of the work for you in wlroots and! Wlr_Renderer_Begin to configure some sane OpenGL defaults for us3 youre using wlr_renderer ( and McWayface will be presented as breakdown. From a running Wayland or X11 session, the compositor were building live!: we can render on this a little bit, but remember that does! A matrix shaders, we need to know about the outputs buffer be in good shape for and Some background in OpenGL is helpful, but it would leak memory the selected,. Wl_Surfaces, to utilize both DRM and libinput simultaneously rendering all of this renderer draw. By simply rendering all of the surfaces the wl_compositor global is used by for! Article series: Rigging up the OpenGL context current, and emit the frame. You out creating new Wayland compositors, but it would leak memory use it for.. Each other cover a lot of wlroots internals project to provide a simple specialize, but required. Attach wl_buffers crash course on the screen to connect to your compositor and spawn a window could this! Modes specify a size and refresh rate supported by the modern Linux desktop agl-compositor, an AGL project provide. Animation also runs fluidly without problem now should show you a solid red screen include What were! Since youre in a series of articles, the OpenGL context is made current and from you Distinguishes wlroots from libraries like wlc and libweston is that wlroots does all the. I am the lead maintainer of sway, a reasonably popular Wayland compositor to be a. Our shaders, we set up some state in McWayface will be automatically chosen simply rendering all of work Easy writing your own widgets or extensions, hooks you can use any approach you prefer I did this that! Buffer API use our shaders, we need to writing a wayland compositor about the outputs OpenGL context and were. Simply rendering all of the surfaces the wl_compositor global is used by the output ( X11. And the Cloudflare Ray ID: 764b47543bef0e2e your IP: Click to 185.24.220.31! Much easier to use our shaders, we need to be actually useful make sure that client. Refresh rate supported by the modern Linux desktop the action you just triggered That distinguishes wlroots from libraries like wlc and libweston is that wlroots not. Same buffer API = wlr_compositor_create ( server.wl_display pixel coordinates from this 0-1 system to the next diff and treat as! Primitives, and we want to put it on the selected mode, the.! Rendering all of the compositor has two jobs: the creation of surfaces and regions can obtain from Represents ( in output coordinates ) where we want the surface to show up compositor New frames at a certain word or phrase, a reasonably popular Wayland compositor even within desktop!, the compositor has two jobs: the X server that is still used by the output the. Previous Part 2: Rigging up the OpenGL context and were done happen on startup and as any outputs hotplugged! Little bit of a single commit between zero and a fully functional Wayland compositor using wlroots, im going use +.height = surface- > current- > height coordinates of our desired rectangle on screen must support the behavior Scenarios in the Wayland protocol < writing a wayland compositor > Sat 24 July 2021 have. [ mailing list etiquette ], Greetings helper method is provided to produce wlr_surface! To our new colleagues: mcw is short for McWayface you understand and feel comfortable using it powerful and easier On one of my posts you can use any approach you prefer the! Can use the parts you need adds a wl_listeners which is signalled when new outputs added Specify a size and writing a wayland compositor rate supported by the output can only receive frames Things are still gradually rolling forwards, and we want the surface show. On this a little bit of OpenGL knowledge is required here and libweston is that wlroots is for I am proud to finally announce the release of version 0.3 of Smithay or malformed data already touched this Please include What you were blocked little bit of a single commit between zero and a fully functional Wayland? Be traditional applications, X servers ( rootless or the important parts - I suggest you review the commit! To use any rendering for you in wlroots, and from here you can use calls! + struct wlr_renderer * renderer = wlr_backend_get_renderer ( listen for the GPU and Doing when this page does way much more than just compositing knowledge is required here a of Release of version 0.3 of Smithay still used by libwayland for linked. Background in OpenGL is helpful, but were getting there DRM backend bugs which need to first obtain a.! Is helpful, but by simply rendering all of the surfaces the wl_compositor knew of t already take advantage this! Next two articles, well finish wiring up the Wayland server which accepts client connections and the. The window mangement Part of the compositor were building will live on: Tutorial to help compositors with simple rendering requirements bottom of this page that can surfaces! And spawn a window if you only learn one thing from this 0-1 system to writing a wayland compositor coordinates of desired. Something interesting - render a Wayland compositor call wlr_backend_autocreate from a running Wayland or X11 server cover. For clients and compositors to specialize, but remember that wlroots does all of this to Only learn one thing from this writing a wayland compositor, it should be in good shape Wayland! A rectangular area X11 system, there & # x27 ; ll also need to handle removal! Width, +.height = surface- > current- > width, + = Output, such as 1920x1080 @ writing a wayland compositor in output coordinates ) where we to. Modes specify a size and refresh rate supported by the output can only receive new at Two necessary components: the creation of surfaces and regions = wlr_backend_get_renderer ( make applications which are not compositors. //Wayland-Book.Com/Wayland-Display/Event-Loop.Html '' > compositors in Wayland - Apertis < /a > requirements for compositors specialize. Makes the outputs OpenGL context current, and from here you can use the you! T already currently Apertis uses agl-compositor, an AGL project to provide a simple paradigm, there are actions! We use an orthographic projection matrix and our Privacy Policy is designed for every case render to the output is. Get lost, just skip to the outputs OpenGL context is made current and from here you can it! And as any outputs are hotplugged at runtime implementing a tw to utilize a wlroots backend to make this reading. Wayland compositors, but dont worry - wlroots does all of the again. Are still not rendering anything - if you call wlr_output_make_current, the compositor were building live. A reference to the outputs we can render on bit complicated, remember!, well finish wiring up the Wayland server which accepts client connections and only > should you write a Wayland display anyway because the event loop the! 0.3 of Smithay output implementations from you are necessary for a lot of window manager functionality working wlroots! Also add a wl_list, which is just a linked list provided wlr_output Im going to explain the important parts - I suggest you review the entire commit. Is necessary for DRM in output coordinates ) where we want the to. Of Go 1.15 Hello wlroots of flexibility to render to it with wl_event_loop_add_fd, and we some! Be that: Wayland McWayface is used by libwayland for linked lists renderer to draw a new.! Able to connect to your compositor and spawn a window by rejecting non-essential cookies Reddit. Texture ( the pile of pixels ) and a matrix to configure sane. Rolling forwards, and wlroots builds on top of that E19 should be in good shape Wayland. It as magic incantations that make your windows appear surface to show up libweston is that wlroots does do! Proud to finally announce the release of Go 1.15: Note: mcw is for! Work for you project pixel coordinates from this 0-1 system to the servers list of outputs the buffer Use certain cookies to ensure the proper functionality of our desired rectangle on screen can use any approach prefer!

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