The value of each pixel value may be mapped to any color (Un-decomposed Colormap), or certain bits of each pixel are dedicated to the red, green, and blue primary colors (Decomposed Colormap). The color tables may be changeable from within IDL (read-write), or may be fixed (read-only). The X Window server (your display) may provide colors or only gray scale (black and white), or both. Visuals specify how the hardware deals with color. To view the current state of the X Windows driver. Once the X driver is enabled via SET_PLOT, the DEVICE procedure is used to control its actions, as described below. This causes IDL to use the X Window System for producing graphical output. To use X Windows as the current graphics device, issue the IDL command: Although in the most common case, the server and client reside on the same machine, this network based design allows much more elaborate configurations. Client processes (such as IDL) display graphics and text on the screen of a server by sending X protocol requests across the network to the server.
A server consists of a display, keyboard, and pointer (such as a mouse) as well as the software that controls them. In the X system, there are two basic cooperating processes:
IDL uses the X System (often referred to simply as "X"), to provide an environment in which the user can create one or more independent windows, each of which can be used for the display of graphics and/or images. X Windows is a network-based windowing system developed by MIT's project Athena.
0 kommentar(er)
