Editing Quartz (graphics layer) (section)

==Quartz 2D and Quartz Compositor==
[[Quartz 2D]] is the primary two-dimensional (2D) text and graphics rendering library:  It directly supports [[Aqua (user interface)|Aqua]] by displaying [[2D computer graphics|two-dimensional graphics]] to create the user interface, including on-the-fly [[rendering (computer graphics)|rendering]] and [[Spatial anti-aliasing|anti-aliasing]]. Quartz can render text with [[subpixel rendering|sub-pixel precision]]; graphics are limited to more traditional anti-aliasing, which is the default mode of operation but can be turned off.<ref>{{cite web|title=Apple - Developer - Quartz Programming Guide for QuickDraw Developers: Drawing Destinations |url=https://developer.apple.com/documentation/Carbon/Conceptual/QuickDrawToQuartz2D/tq_other/chapter_3_section_3.html |access-date=February 12, 2007 |url-status=dead |archive-url=https://web.archive.org/web/20080905214109/http://developer.apple.com/documentation/Carbon/Conceptual/QuickDrawToQuartz2D/tq_other/chapter_3_section_3.html |archive-date=September 5, 2008 }}</ref> In [[Mac&nbsp;OS&nbsp;X 10.4 Tiger]], Apple introduced Quartz 2D Extreme, enabling Quartz 2D to offload rendering to compatible [[Graphics processing unit|GPU]]s. However, GPU rendering was not enabled by default due to potential video redraw issues or [[kernel panic]]s.<ref>{{cite web | title=Apple - Info - Docs - About the Mac OS X 10.4.3 Update (Delta) | url=http://docs.info.apple.com/article.html?artnum=301984 | access-date=September 20, 2007 | archive-url=https://web.archive.org/web/20071016043656/http://docs.info.apple.com/article.html?artnum=301984 | archive-date=October 16, 2007 | url-status=dead | df=mdy-all }}</ref> 
In [[Mac&nbsp;OS&nbsp;X v10.5]] Quartz 2D Extreme was renamed to QuartzGL.

The [[Quartz Compositor]] is the [[compositing]] engine used by [[macOS]].  In [[Mac&nbsp;OS&nbsp;X Jaguar]] and later, the Quartz Compositor can use the graphics accelerator (GPU) to vastly improve composition performance.  This technology is known as Quartz Extreme and is enabled automatically on systems with supported graphics cards.<ref name="apple1"/>