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Information about X Rendering Extension

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xclock uses the render extension for rendering translucent and antialiased clock hands
The X Rendering Extension (Render or XRender) is an X Window System extension to implement Porter-Duff image compositing in the X server.

History

It was written by Keith Packard in 2000 and was first released with XFree86 version 4.0.1.

Features

It provides several rendering operations and also does alpha blending. At present it is primarily used to implement antialiased fonts, but is expected to be used to implement drop shadows and translucency.

Geometric figures are rendered by client-side tessellation into either triangles or trapezoids. Text is drawn by loading the glyphs into the server and rendering as a group.

Performance

It is designed to target the 3D graphics capabilities of newer video cards.

References

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X Window System
ArchitectureCore Protocol Xlib X Window selection X window manager X session manager X display manager X Toolkit X Window authorization Intrinsics X11 color names
Window managersCompositing Re-parenting Tiling
ExtensionsX Image Extension X keyboard extension X video extension Shape extension Shared memory extension GLX XRender
Notable ImplementationsX11.app X.Org Server X-Win32 XFree86 XDarwin Xming Xsun
StandardsICCCM
Applicationsxterm Desktop environments
X Window System (commonly X11 or X) is a display protocol which provides windowing on bitmap displays. It provides the standard toolkit and protocol to build graphical user interfaces (GUIs) on Unix-like operating systems and OpenVMS, and has been ported to all other
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In computer graphics, alpha compositing is the process of combining an image with a background to create the appearance of partial transparency. It is often useful to render image elements in separate passes, and then combine the resulting multiple 2D images into a single, final
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Keith Packard is a software developer, best known for his work on the X Window System.

Packard is responsible for many X extensions and technical papers on X. He has been heavily involved in the development of X since the late 1980s, at the MIT X Consortium, XFree86 and
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Maintainer: The XFree86 Project, Inc.â„¢

OS: multiple

Use: Windowing system
License: 1.1
Website: www.xfree86.org XFree86 is an implementation of the X Window System.
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In computer graphics, alpha compositing is the process of combining an image with a background to create the appearance of partial transparency. It is often useful to render image elements in separate passes, and then combine the resulting multiple 2D images into a single, final
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In digital signal processing, anti-aliasing is the technique of minimizing the distortion artifacts known as aliasing when representing a high-resolution signal at a lower resolution.
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computer font is an electronic data file containing a set of glyphs, characters, or symbols such as dingbats. Although the term "font" once referred to interchangeable typefaces using mechanical components such as a typeball element or a daisy wheel, most modern fonts are used in
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drop shadow is a visual effect consisting of drawing what looks like the shadow of an object, giving the impression that the object is raised above the objects behind it. The drop shadow is often used for elements of a graphical user interface such as windows or menus, and for
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Transparency is possible in a number of graphics file formats. The term transparency is used in various ways by different people, but at its simplest there is "full transparency" i.e. something that is completely invisible.
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A triangle is one of the basic shapes of geometry: a polygon with three corners or and three sides or edges which are straight line segments.

In Euclidean geometry any three non-collinear points determine a triangle and a unique plane, i.e.
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trapezoid (in North America) or trapezium (in Britain and elsewhere) is a quadrilateral, which is defined as a shape with four sides, which has one set of parallel sides.
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glyph is the shape given in a particular typeface to a specific grapheme or symbol.

The term for the abstract entity represented by a glyph is character: a typographical character may be a grapheme (an element of a writing system), but also a numeral, a punctuation
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July 23 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

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The USENIX Association is the Advanced Computing Technical Association. It was founded in 1975 under the name "Unix Users Group", focusing primarily on the study and development of Unix and similar systems.
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The USENIX Association is the Advanced Computing Technical Association. It was founded in 1975 under the name "Unix Users Group", focusing primarily on the study and development of Unix and similar systems.
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Maintainer: X.Org Foundation

OS: Cross-platform

Use: X window system
License: X11 License
Website: [1] The X.Org Server (officially the X.
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X Window System (commonly X11 or X) is a display protocol which provides windowing on bitmap displays. It provides the standard toolkit and protocol to build graphical user interfaces (GUIs) on Unix-like operating systems and OpenVMS, and has been ported to all other
..... Click the link for more information.
In computing, the X Window System (commonly X11 or X) is a network-transparent windowing system for bitmap displays. This article details the protocols and technical structure of X11.
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X Window System core protocol[1][2][3] is the base protocol of the X Window System, which is a networked windowing system for bitmap displays used to build graphical user interfaces on Unix, Unix-like, and other operating systems.
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Xlib is an X Window System protocol client library in the C programming language. It contains functions for interacting with an X server. These functions allow programmers to write programs without knowing the details of the protocol.
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Selections, cut buffers, and drag-and-drop are the mechanisms used in the X Window System to allow a user to transfer data from a window to another. Selections and cut buffer are used (typically) when a user selects text or some other data in a window and paste in
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An X window manager is software that controls the placement and appearance of windows under the X Window System, a windowing system mainly used on Unix-like systems.
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In the X Window System, an X session manager is a session management program, a program that can save and restore the current state of a set of running applications.

Overview


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In the X Window System, an X display manager runs as a program, allowing starting a session on an X server from the same or another computer.

A display manager presents the user with a login screen into which to insert username and password.
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X Toolkit is development software for building X Window System applications. Typically includes a widget set, X Toolkit Intrinsics (Xt) libraries for managing the widget set and the X Library (Xlib).
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xhost program and three X Window System core protocol requests are used to activate this mechanism and to display and change the list of authorized hosts.

Cookie-based access


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Intrinsics (also known as Xt, for X toolkit) is a library used in the X Window System. More precisely, it is a library that uses the low-level Xlib library and provides a friendly (object-oriented-looking) API to develop X11 software with graphical widgets.
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In computing, on the X Window System, X11 color names are represented in a simple text file, which maps certain strings to RGB color values. It is shipped with every X11 installation, hence the name, and is usually located in <X11root>/lib/X11/rgb.
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