Quartz Extreme Acceleration Mac Download

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Xgl
Original author(s)	David Reveman
Initial release	January 2, 2006; 14 years ago
Type	Display server
Website	web.archive.org/web/20070605230047/http://www.freedesktop.org/wiki/Software/Xgl

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The latest version of Quartz Debug is 4.1 on Mac Informer. It is a perfect match for the General category. The app is developed by Apple Inc. And its user rating is 3 out of 5. Quartz Compositor is the windowing system that is responsible for the user interface in Mac OS X.Starting with Mac OS X 10.2, Quartz Compositor was extended by Quartz Extreme, which uses OpenGL to render screen displays faster by presenting them as textures within a 3D OpenGL context. This permits faster compositing of screen images using 3D hardware acceleration.

Xgl is an obsolete display server implementation supporting the X Window System protocol designed to take advantage of modern graphics cards via their OpenGL drivers, layered on top of OpenGL.^[1] It supports hardware acceleration of all X, OpenGL and XVideo applications and graphical effects by a compositing window manager such as Compiz or Beryl. The project was started by David Reveman of Novell and first released on January 2, 2006. It was removed^[2] from the X.org server in favor of AIGLX on June 12, 2008.

History[edit]

Xgl was originally developed on public mailing lists, but for a long time, until January 2, 2006 most^[3] development of Xgl was done behind closed doors. On that day the source to Xgl was re-opened to the public,^[4]^[5] and included in freedesktop.org, along with major restructuring to allow a wider range of supported display drivers. X server backends used by Xgl include Xglx and Xegl. In February 2006 the server gained wide publicity after a public display where the Novell desktop team demonstrated a desktop using Xgl with several visual effects such as translucentwindows and a rotating 3D desktop.^[6]^[7]^[8] The effects had first been implemented in a composite manager called glxcompmgr (not to be confused with xcompmgr), now deprecated because several effects could not be adequately implemented without tighter interaction between the window manager and the composite manager. As a solution David Reveman developed Compiz, the first proper OpenGL compositing window manager for the X Window System. Later, in September 2006, the Berylcompositing window manager was released as a fork of the original Compiz. Compiz and Beryl have merged back in April 2007, which resulted in the development of Compiz Fusion.

Backends[edit]

OpenGL does not specify how to initialize a display and manipulate drawing contexts. Instead these operations are handled by an API specific to the native windowing system. So far there are two different backend approaches to solving this initialization problem. Most likely the majority of each backend will contain the same code and the differences will primarily be in the initialization portions of the servers.

Xglx[edit]

Xglx was the first backend implemented for this architecture. It requires an already existing X server to run on top of and uses GLX to create an OpenGL window which Xgl then uses, similar to Xnest. This mode is only intended to be used for development in the future, as it is redundant to require an X server to run Xgl on top of.

At XDevConf 2006 (the 2006 X development conference), NVIDIA made a presentation arguing that this is the wrong direction to take because the layered server abstracts features of the cards away. This makes driver specific capabilities like support for 3D glasses and dual monitor support much more difficult.^[9]

However, delegating initialization to an existing X server allows the developers to immediately focus on server functionality rather than dedicating substantial time to specifics of interfacing with numerous video hardware. At the moment, Xglx does not officially support multiple monitors, although it has been achieved on Ubuntu Dapper / ATI / NVIDIA (twinview).

Xegl[edit]

Xegl was a long-term goal of X server development.^[10] It shares much of the drawing code with the Xglx server, but the initialization of the OpenGL drawable and context management is handled by the EGL API developed by Khronos (EGL is a window system-independent equivalent to the GLX and WGL APIs, which respectively enable OpenGL support in X and Microsoft Windows). The current implementation uses Mesa-solo to provide OpenGL rendering directly to the Linux framebuffer or DRI to the graphics hardware. As of July 2007 Xegl can only be run using Radeon R200 graphics hardware and development is currently stalled.^[11] It is likely that it will remain so until the Xglx server has proven itself and the closed source drivers add support for the EGL API, when it should be a transparent replacement for the nested Xglx server.

Rationale[edit]

Structuring all rendering on top of OpenGL could potentially simplify video driver development. It removes the artificial separation of 2D and 3Dacceleration. This is advantageous as 2D operations are frequently unaccelerated (which is counterintuitive, since 2D is a subset of 3D).^{[citation needed]}

It also removes all driver-dependent code from the X server itself, and allows for accelerated Composite and Render operations independent of the graphics driver.

Competitors[edit]

Hardware acceleration of 2D drawing operations has been a common feature of many window systems (including X11) for many years. The novelty of Xgl and similar systems is the use of APIs specifically developed for 3D rendering for accelerating 2D desktop operations. Prior to the adoption of anti-aliased drawing by X11, the use of 3D rendering APIs for 2D desktop rendering was undesirable because such APIs did not make the pixel accurate rendering guarantees that are part of the original X11 protocol definition.

Hardware-accelerated OpenGL window and desktop rendering, limited to using OpenGL for texture composition, has been in use in Mac OS X, in a technology called Quartz Extreme, since Mac OS X v10.2. Quartz 2D Extreme is an enhancement of this feature and more directly comparable to Xgl. Like Xgl, Quartz 2D Extreme brings OpenGL acceleration to all 2D drawing operations (not just desktop compositing) and ships with Mac OS X v10.4, but is disabled by default pending a formal declaration of production-readiness. Core Animation is the extension of this effort for Leopard (Mac OS X v10.5).

Several desktop interfaces based on 3D APIs have been developed, more recently OpenCroquet and Sun Microsystems' Project Looking Glass[1]; these take advantage of 3D acceleration for software built within their own framework, but do not appear to accelerate existing 2D desktop applications rendered within their environment (often via mechanisms like VNC).

Microsoft developed a similar technology based on DirectX, named the DWM, as part of its Windows Vista operating system. This technology was first shown publicly at Microsoft's October 2003 PDC.

Availability[edit]

As of May 2006, the Xgl X Server (and related components including the Compiz compositing manager and associated graphical config tools) ships as a non-default in one major Linux distribution, SUSE 10.1, and is included in Frugalware Linux or SUSE Linux Enterprise Desktop 10. Xgl can be set up fairly easily for Ubuntu 6.06 LTS (Dapper Drake) and 6.10 (Edgy Eft) and for Freespire with binary packages from unofficial repositories. Xgl is also available as an overlaid package in Gentoo Linux, and as a PKGBUILD for Arch Linux.

Mandriva Linux 2007 includes official packages to run Compiz, using Xgl and AIGLX. Mandriva provides drak3d, a tool to configure a 3D Desktop in two clicks.

Ubuntu 6.10 'Edgy Eft' and later use AIGLX, not Xgl, by default.

Xgl was removed from X11R7.5 in 2009 due to its being an unmaintained server variant.^[12]

References[edit]

^HOPF, MATTHIAS (2006). 'BEYOND EYE CANDY: An OpenGL-accelerated desktop with Xgl and Compiz'. Linux Magazine. 68: 24–26. Retrieved 6 February 2017.
^XGL Version Info
^ALGIX, Nvidia, XGL and metacityArchived March 8, 2006, at the Wayback Machine
^Latest XGL Code
^Novell's XGL Code posted
^Novell Public Release XGL Code
^SUSE XGL^{[permanent dead link]}
^OpenSUSE XGL resources^{[permanent dead link]}
^http://download.nvidia.com/developer/presentations/2006/xdevconf/compositing-with-current-framework.pdf
^Smirl, Jon (30 August 2005). 'The State of Linux Graphics'. Retrieved 18 February 2016.
^http://gitweb.freedesktop.org/?p=xorg/xserver.git;a=history;h=master;hb=master;f=hw/xgl/egl/xegl.c
^http://www.x.org/wiki/Releases/7.5 X.org Foundation Releases/7.5

External links[edit]

Wikimedia Commons has media related to Compiz.

Article: The State of Linux Graphics — overview of various approaches to replace the current X server

Retrieved from 'https://en.wikipedia.org/w/index.php?title=Xgl&oldid=858944844'

(Redirected from Quartz Extreme)

Quartz Compositor
Type
Operating system	macOS
License	Proprietary software under EULA
Website	developer.apple.com/technologies/mac/graphics-and-animation.html

macOS graphics model
Rendering
Compositing

Quartz Compositor is the display server (and at the same time the compositing window manager) in macOS. It is responsible for presenting and maintaining rasterized, rendered graphics from the rest of the Core Graphics framework and other renderers in the Quartz technologies family.^[1]

Overview[edit]

The bitmap output from Quartz 2D, OpenGL, Core Image, QuickTime, or other process is written to a specific memory location, or backing store. The Compositor then reads the data from the backing stores and assembles each into one image for the display, writing that image to the frame buffer memory of the graphics card. Quartz Compositor only accepts raster data, and is the only process that can directly access the graphics frame buffer.^[2]

In managing individual windows, Quartz Compositor accepts a bitmap image of the window's contents from its renderer, along with its position. The choice of the renderer is up to the individual application, although most use Quartz 2D. Quartz Compositor then acts as a 'visual mixing board,' by adding the given window to the whole scene for the display.

In its role as window manager, Quartz Compositor also has an event queue which receives events, such as key strokes and mouse clicks. The Quartz Compositor takes the events from the queue, determines which process owns the window where the event occurred, and passes the event on to the process.^[3]

Quartz Extreme[edit]

Mac OS X v10.2 introduced Quartz Extreme: graphics processor (GPU) acceleration for the Quartz Compositor. With Quartz Extreme, far fewer central processor (CPU) cycles are needed for scene composition. Instead, the Quartz Compositor encapsulates each rendered backing store in an OpenGL texture map or surface. It then directs the GPU to compose the surfaces and maps to provide the final image, which is delivered to the frame buffer.

Quartz Extreme only uses OpenGL commands, and requires a graphics card connected to an AGP 2X or faster bus (including AGP 4X, 8X, and PCI Express), supporting textures and maps of arbitrary size, since many of the renderers have no size limitation (Quartz 2D for example).^[2] In Mac OS X Tiger, it is automatically enabled on Mac systems with one of the following types of graphics cards:^[4]

AMD (ATI) Radeon, AGP-based, 16MB VRAM minimum, or better
NVIDIA GeForce2 MX, 16MB VRAM minimum, or better

As of OS X El Capitan, Quartz Extreme is enabled on all supported Macs.

QuartzGL[edit]

QuartzGL (called Quartz 2D Extreme when it was introduced in Mac OS X Tiger) is GPU acceleration for the Quartz 2D API. With QuartzGL enabled, all Quartz drawing commands are translated to OpenGL commands and executed on the GPU. This differs from Quartz Extreme, which still executes Quartz drawing commands on the CPU but performs final composition using the GPU.

As of OS X Mountain Lion, QuartzGL is still not enabled by default. However, it is possible to enable it using the Quartz Debug application included in the Apple Developer Tools. QuartzGL will be disabled once again upon quitting the Quartz Debug utility. A workaround is to force quit the Quartz Debug application, which will leave QuartzGL enabled system-wide.

All graphics cards capable of supporting Core Image also support QuartzGL.

References[edit]