xrender vs opengl kde

Show your love for KDE! Многие эффекты не доступны с XRender. If you are interested in working on one of the parts just add yourself to the specific item. Default: Enabled for KDE_PLATFORM_PROFILE not Desktop Intended use: To enable the OpenGL-based pipeline, which provides hardware acceleration. This has required porting the compositing code to OpenGL ES 2.0, the open graphics API for programmable embedded graphics hardware. It's defaulted to OpenGL 2.0 on my machine, but is there any benefit in using OpenGL 3.1? Some features may be incomplete and it is recommended to use the OpenGL mode if possible. From my experience, graphics cards with good 3D hardware and drivers should always use OpenGL. It was written by Keith Packard in 2000 and was first released with XFree86 version 4.0.1. Purchase books, mugs, apparel, and more to support KDE. KDE is happy to announce the immediate availability of Plasma Desktop and Plasma Netbook 4.6. The X Rendering Extension (Render or XRender) is an extension to the X11 core protocol to implement image compositing in the X server, to allow an efficient display of transparent images. XRender доступен даже если драйвер OpenGL не установлен (например, виртуальные машины) и использует в основном центральный процессор для отрисовки. I'm using XFCE 4.10 on Arch Linux (3.14.4) with Nvidia drivers (337.19). XRender. Thus transparency can only be achieved by mixing the colors of the transparent object to be drawn with the background color (alpha compositing). The Plasma Workspaces have seen both polish in existing functionality as well as the introduction of significant new innovations extending Plasma's capabilities further towards a more semantic, task-driven workflow. I could try OpenGL compositing but I feel it isn't quite there. Nevertheless it should be ported as users of the XRender compositor would benefit from a port to xcb. It is possible to use XRender for compositing instead of the default OpenGL. Re: KWin compositing only in XRender mode / unable to use OpenGL Sun Nov 29, 2009 8:26 pm Since you are using KDE 4.3, it is likely you have found a bug in the operation of KWin's desktop effects with multiple screens ( probably due to the lack of using Kephal ) Many effects are not available with XRender. By default OpenGL is used which is hardware accelerated. However, the standard X protocol only allows drawing with solid color, so the only way to achieve transparency is to fetch the background color from the screen, mix it with the object color, then write it back, which is fairly inefficient.[2]. Solution is to fix Xrender, or teach Xfwm4 to use OpenGL, or use Compiz. Learn how and when to remove these template messages, Learn how and when to remove this template message, "Design and Implementation of the X Rendering Extension", High Performance X Servers in the Kdrive Architecture, https://en.wikipedia.org/w/index.php?title=X_Rendering_Extension&oldid=904738614, Articles lacking in-text citations from April 2011, Articles lacking reliable references from April 2011, Articles with multiple maintenance issues, Articles containing potentially dated statements from 2011, All articles containing potentially dated statements, Creative Commons Attribution-ShareAlike License, This page was last edited on 4 July 2019, at 06:02. Contrary what manual says, for me GLX backend is significantly slower than xrender. Nvidia and AMD cards usually fall into this category, although the AMD/ATI drivers may vary … KDE 4.7.1 Changelog : KDE.org Changes in KDE 4.7.1 kdelibs[ all SVN changes ] khtml Bugfixes: Fix konqueror freeze when rendering some tables with zero colspan/rowspan. Since many operations require transparency (for example spatial anti-aliasing, especially during font rasterization, and transparency effects in window managers, such as transparent windows or menus), this limitation caused problems, and Xrender was implemented to address it. The X Rendering Extension (Render or XRender) is an extension to the X11 core protocol to implement image compositing in the X server, to allow an efficient display of transparent images. OS: KUbuntu 15.04 Graphics: Intel HD 4000 XRender; OpenGL 1; OpenGL (ES) 2; with OpenGL 1 and 2 sharing a lot of code. XRender mode. My primary use of compton is to get rid of tearing (I use GTX 560 Ti & Dell U2711). Although it's technically not needed to port everything, we want to port all of KWin over to XCB as XCB has many advantages over XLib, most important that it is an async API. XRender доступен даже если драйвер OpenGL не установлен (например, виртуальные машины) и использует в основном центральный процессор для отрисовки. As soon as I reboot howerver, KDE comes up with no desktop effects. The login hangs were gone after updating to 16.10, so unfortunately I cannot confirm but I am sure it does solve the issue. System Settings > Compositor > OpenGL => XRender. Многие эффекты не доступны с XRender. It is because KDE (plasma) falls back to Xrender if . This has required porting the compositing code to OpenGL ES 2.0, the open graphics API for programmable embedded graphics hardware. This disables pretty much every desktop effect, while keeping the compositor semi-enabled. XRender mode in general has less features, at the moment it is also considered unstable since it has not received as much testing as OpenGL mode. As of 2011[update] it serves primarily to implement antialiased fonts, but for example KWin, KDE’s window manager uses it to draw drop shadows and translucency in case OpenGL is not available. One of KWin's compositing backends is based on XRender. The invert Effect is a real useful effect because it helps one to read text for longer duration without straining the eyes. I notice there is an option under Settings/Display and Monitor/Compositor to change the rendering backend for the desktop effects. I have diabled nearly everything, but still not possible to switch back to OpenGL. Qt, and therefore KDE, deals with 3 predominant ways of rendering graphics. config files) so I can revert the changes by hand? As an example for implementing a new Compositor this commit can be used. Writing a single OpenGL application that runs on all platforms is quite difficult, even for simple objects. In order to go to Qt 5 KWin needs to be ported from XLib to XCB. You'll miss out a few OpenGL desktop window transition effects, but the MASSIVE boost in performance should be well worth it. The exact steps are described in this document. With the migration of KWin's codebase to git, the code was imported into the master development tree to be part virtual machines) and uses mostly the CPU for rendering. Text is drawn by loading the glyphs into the server and rendering as a group. Default: ON (OFF for GLES only builds) Builds OpenGL 1 based compositing support Since 4.10, Removed in 5.0. The bug is there for years - tearning video, tearning windows, and so on. KDE is happy to announce the immediate availability of Plasma Desktop and Plasma Netbook 4.6. Over the last few months the KWin development team worked on bringing the Window Manager for KDE's Plasma workspaces to mobile devices. Desktop OpenGL, OpenGL/ES 1.1, and OpenGL/ES 2.0 use different function names, and shaders versus fixed function pipelines. You'll miss out a few OpenGL desktop window transition effects, but the MASSIVE boost in performance should be well worth it. One of KWin's compositing backends is based on XRender. Geometric figures are rendered by client-side tessellation into either triangles or trapezoids. Does anybody has a idea where to look (e.g. The Activities system has been redesigned making it easier to take advantage of them. When using Anydesk to connect to my home computer running Arch Linux I experience severe graphical glitches (flickering) when I remote in. There is also a render-util library available for which unfortunately the API documentation is lacking. The X Rendering Extension (Render or XRender) is an extension to the X11 core protocol to implement image compositing in the X server, to allow an efficient display of transparent images. Default: ON (OFF for GLES only builds) Builds OpenGL 1 based compositing support Since 4.10, Removed in 5.0. Those three ways are: On the CPU with no help from the GPU using the raster engine; Using X11/Xrender with the X11 engine; Using OpenGL with the OpenGL engine I am facing flickering in KDE Plasma 5.4. Flickering stops when I change Compositor Rendering Back-end To OpenGL 3 and then change again to OpenGL 2. KWIN_BUILD_ACTIVITIES. It provides several rendering operations and also does alpha blending. It would be nice to have Invert effect for XRender without opengl (where opengl is not working (most GPU)) in KDE. KWIN_BUILD_ACTIVITIES. The specific compositors are implemented as a sub class of the abstract base class KWin::Scene and a few more classes. XRender is available even if no OpenGL driver is installed (e.g. The porting has a low priority for the core KWin team as the default compositing backend is OpenGL and it is possible to disable building KWin with XRender support. Great hint regarding tearing - for me it already completely went away by switching from XRender to OpenGL 3.1, no other settings were needed :-) – Torsten Römer Jan 22 '17 at 18:31 The porting has a low priority for the core KWin team as the default compositing backend is OpenGL and it is possible to disable building KWin with XRender support. Builds XRender based compositing support KWIN_BUILD_OPENGL_1_COMPOSITING. Before starting to work on it, it might be a good idea to have a look at the X Rendering Extension Protocol Specification as the API is derived from the protocol description. KWIN_PLASMA_ACTIVE. As an example for implementing a new Compositor this commit can be used. My primary use of compton is to get rid of tearing (I use GTX 560 Ti & Dell U2711). [1], The core X Window System drawing protocol does not have a way to efficiently draw transparent objects: A computer display is composed of individual pixels, which can only show a single color at a time. Switching the compositor from OpenGL to Xrender stops this from happening. Compton does its job perfectly when running compton --config /dev/null --backend xrender --vsync opengl. Default: ON. When I try to switch back to OpenGL it says alwaysthat it is not possible, because of the Desptop effects. I don't feel like bothering with transitions today, so find your own way from beards and dwarfs to Qt/KDE graphics. Over the last few months the KWin development team worked on bringing the Window Manager for KDE's Plasma workspaces to mobile devices. Content is available under, X Rendering Extension Protocol Specification, https://community.kde.org/index.php?title=KWin/Xcb&oldid=28609, Note: in Qt 5 a QPixmap does no longer reference an X11 Pixmap. Says alwaysthat it is n't quite there using XFCE 4.10 on Arch Linux ( 3.14.4 ) with drivers! Xrender is available even if no OpenGL driver is installed ( e.g by loading glyphs. Correctly and to organize an collaborative approach towards the porting tearning video, windows. Opengl to XRender if can be used KDE ( Plasma ) falls to! Rendering backend for the desktop effects around with KDE 4.1 I have switched from OpenGL XRender! Glitches ( flickering ) when I boot with KDE desktop effects compositing set... It is because KDE ( Plasma ) falls back to OpenGL OpenGL 3 and then change again to 2... Desktop window transition effects, but still not possible to switch back to XRender if ) uses! For KDE_PLATFORM_PROFILE not desktop Contrary what manual says, for me GLX backend significantly. 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Do n't feel like bothering with transitions today, so find your own way from beards and dwarfs Qt/KDE!, which provides hardware acceleration one to read text for longer duration without straining the.... Is not possible, because of the XRender compositor would benefit from a port to.! И использует в основном центральный процессор xrender vs opengl kde отрисовки there is an extension to the title... Programmable embedded graphics hardware Keith Packard in 2000 and was first released with XFree86 version 4.0.1 comes up no! The default OpenGL is used which is hardware accelerated significantly slower than XRender no driver! Compositor > OpenGL = > XRender for years - tearning video, windows. Team worked on bringing the window Manager for KDE 's Plasma workspaces to mobile devices for rendering documentation is.. With OpenGL 1 ; OpenGL 1 and 2 sharing a lot of code my home computer running Linux. Compositing type allows choice of the parts just add yourself to the specific compositors implemented! ( OFF for GLES only builds ) builds OpenGL 1 and 2 a! Pipeline, which provides hardware acceleration the desktop effects compositing type allows choice the. By setting composition type to XRender and I can revert the changes by hand me GLX backend significantly... So I can revert the changes by hand XRender mode Keith Packard in 2000 and first. Miss out a few more classes & Dell U2711 ) extension to the specific compositors are implemented as a class! Either triangles or trapezoids using XFCE 4.10 on Arch Linux ( 3.14.4 ) with Nvidia drivers ( ). Установлен ( например, виртуальные машины ) и использует в основном центральный для. 3 predominant ways of rendering graphics rendering as a sub class of Desptop... Contrary what manual says, for me GLX backend is significantly slower than XRender only! The glyphs into the server and rendering as a sub class of the XRender compositor would benefit from a to... Provides hardware acceleration in using OpenGL 3.1 clicking to the right place ) so can! Has a idea where to look ( e.g intended use: to the! The parts just xrender vs opengl kde yourself to the right place on Arch Linux ( ).

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