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XBM image data consists of a line of pixel values stored in a static array. Because a single bit represents each pixel (0 for white or 1 for black), each byte in the array contains the information for eight pixels, with the upper left pixel in the bitmap represented by the low bit of the first byte in the array. If the image width does not ...
The X Window System (X11, or simply X; stylized 𝕏) is a windowing system for bitmap displays, common on Unix-like operating systems. X originated as part of Project Athena at Massachusetts Institute of Technology (MIT) in 1984. [3] The X protocol has been at version 11 (hence "X11") since September 1987.
Since the machine was designed for usage with a standard television set, the 256 × 192 pixel area is surrounded by a wide border that fills up the remaining space of the standard 625-line TV screen area. Usually, the border area assumes a single colour, but using software tricks, it is possible to display some low-resolution graphics there.
In 1991, Apple's Human Interface Group contracted with LetterPerfect Fonts' Garrett Boge and Damon Clark, to design a family of bitmap screen fonts to replace Chicago and Geneva for the Mac OS version 7.5. The family consisted of Sans & Serif, Regular and Bold in discrete bitmap sizes of 8, 9, 10, 12 & 14 pt.
Specifying 1368 pixels as the screen width would yield an unnatural screen height of 769.5 pixels. Many Wide XGA panels do not advertise their native resolution in the standard timing descriptors, instead offering only a resolution of 1280×768. Some panels advertise a resolution only slightly smaller than the native, such as 1360×765.
The single fixed-screen mode used in first-generation (128k and 512k) Apple Mac computers, launched in 1984, with a monochrome 9" CRT integrated into the body of the computer. Used to display one of the first mass-market full-time GUIs, and one of the earliest non-interlaced default displays with more than 256 lines of vertical resolution.
To define colors used by the bitmap image data (Pixel array) Mandatory for color depths ≤ 8 bits Gap1 Yes Variable size Structure alignment An artifact of the File offset to Pixel array in the Bitmap file header Pixel array No Variable size To define the actual values of the pixels The pixel format is defined by the DIB header or Extra bit masks.
In some contexts, the term bitmap implies one bit per pixel, whereas pixmap is used for images with multiple bits per pixel. [3] [4] A bitmap is a type of memory organization or image file format used to store digital images. The term bitmap comes from the computer programming terminology, meaning just a map of bits, a spatially mapped array of ...