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Glamor performance tuning was accepted for Google Summer of Code 2014.
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Glamor requires a 3D driver with support for shaders.
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The ultimate goal of GLAMOR is to obsolete and replace all the DDX 2D graphics device drivers and acceleration architectures, thereby avoiding the need to write X 2D specific drivers for every supported graphic chipset. In this way, it is functionally similar to Quartz Extreme and QuartzGL (2D performance acceleration) for Apple Quartz Compositor. Glamor is a generic, hardware independent, 2D acceleration driver for the X server that translates the X render primitives into OpenGL operations, taking advantage of any existing 3D OpenGL drivers. EXA is regarded as an intermediate step to converting the entire X server to using OpenGL. In X.Org Server release 6.9/7.0, EXA was released as a replacement for XAA, as XAA supplies almost no speed advantage for current video cards. The driver for the ARK chipset was the original development platform for XAA. XAA is on by default, though acceleration of individual functions can be switched off as needed in the server configuration file ( XF86Config or nf). Most drivers implement acceleration using the XAA module. It was removed again from X.Org Server 1.13. It was completely rewritten for XFree86 4.0. It was written by Harm Hanemaayer in 1996 and first released in XFree86 version 3.3. In the X Window System, XFree86 Acceleration Architecture ( XAA) is a driver architecture to make a video card's 2D hardware acceleration available to the X server. XAA is an API between the Device-Independent-X (DIX) and the Device-Dependent-X (DDX), a 2D graphics driver, here e.g. There are (at least) XAA (XFree86 Acceleration Architecture), EXA, UXA and SNA. On ApAMD employee Michel Dänzer released xf86-video-ati version 7.7.0 and xf86-video-amdgpu version 1.1.0, the latter including support for their Polaris microarchitecture. The xf86-video-modesetting package, the Debian-package being called xserver-xorg-video-modesetting, was retired, and the generic modesetting DDX it contained was moved into the server package to become the KMS-enabled default DDX, supporting the vast majority of AMD, Intel and NVidia GPUs.
With version 1.17 a generic method for mode-setting was mainlined. While these can be recompiled as required, the development of the proprietary DDX 2D graphics drivers is greatly eased when the X.Org Server keeps a stable API/ABI across multiple of its versions.
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The available free and open-source graphics device drivers are being developed inside of the Mesa 3D-project.
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The package xserver-xorg-video-nouveau installs nouveau_drv.so with a size of 215 KiB, the proprietary Nvidia GeForce driver installs an 8 MiB-sized file called nvidia_drv.so and Radeon Software installs fglrx_drv.so with a size of about 25MiB.
After installation the 2D graphics driver-file is found under /usr/lib/xorg/modules/drivers/. In Debian the 2D graphics drivers for the X.Org Server are packaged individually and called xserver-xorg-video-*. But the 2D rendering acceleration remained. The mode-setting functionality was moved into the DRM and is being exposed through a DRM mode-setting interface, the new approach being called "kernel mode-setting" (KMS). To this mode-setting functionality, additional support for 2D acceleration was added when such became available with various GPUs. In the past, mode-setting was done by an X-server graphics device driver specific to some video controller hardware ( e.g., a GPU). Each driver is hardware specific and implemented as a separate loadable module.įor historical reasons the X.Org Server still contains graphics device drivers supporting some form of 2D rendering acceleration. Hardware comprises graphics cards as well as mouse and keyboards. In the X.Org Server source code, each directory under "hw" corresponds to one DDX. The Device Dependent X (DDX) is the part of the x-server that interacts with the hardware. This includes code tables, glyph rasterization and caching, XLFDs, and the core rendering API which draws graphics primitives. The main loop and the event delivery are part of the DIX.Īn X server has a tremendous amount of functionality that must be implemented to support the X core protocol. The Device Independent X (DIX) is the part of the X.Org Server that interacts with clients and implements software rendering. Version 1.16.0 integrates support for systemd-based launching and management which improved boot performance and reliability. The X.Org Server implements the server side of the X Window System core protocol version 11 (X11) and extensions to it, e.g. Xdpyinfo, a command to show X.Org Server information.