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At small sizes, chance effects should not be allowed to magnify small differences in the original outline design of a glyph. At large sizes, the subtlety of the original design should emerge. [3] The reference manual suggests that, for screen viewing, fonts should be readable at 9 pixels per em at 72 pixels per inch.
Screen fonts used in EGA and VGA are monospace raster fonts containing 256 glyphs, and 2 fonts may be used simultaneously, for a total of 512 glyphs. All glyphs on screen are the same size, but that size is variable. Typically, glyphs are 8 dots wide and 8–16 dots high, however the height can be any value up to a maximum of 32. Each row of a ...
In 1988, the X Consortium adopted BDF 2.1 as a standard for X Window screen fonts, [2] but X Windows has largely moved to other font standards such as PCF, Opentype, and Truetype. Version 2.2 added support for non-Western writing. For example, glyphs in a BDF 2.2 font definition can specify rendering from top-to-bottom rather than simply left ...
The resolution of 960H depends on whether the equipment is PAL or NTSC based: 960H represents 960 x 576 (PAL) or 960 x 480 (NTSC) pixels. [29] 960H represents an increase in pixels of some 30% over standard D1 resolution, which is 720 x 576 pixels (PAL), or 720 x 480 pixels (NTSC). The increased resolution over D1 comes as a result of a longer ...
More recent versions of Windows display far more glyphs. Because many fonts are designed to fulfill the WGL4 set, this set of characters is likely to work (display as other than replacement glyphs) on many computer systems. For example, all the non-private-use characters in the table below are likely to display properly, compared to the many ...
The original IBM PC MDA display adapter stored the code page 437 character glyphs as bitmaps eight pixels wide, but for visual enhancement displayed them every nine pixels on screen. This range of characters had the eighth pixel column duplicated by special hardware circuitry, [ 22 ] thus filling in gaps in lines and filled areas.
The eye's perception of display resolution can be affected by a number of factors – see image resolution and optical resolution. One factor is the display screen's rectangular shape, which is expressed as the ratio of the physical picture width to the physical picture height. This is known as the aspect ratio. A screen's physical aspect ratio ...
Fine positioning of a mark glyph to a base character Mark-to-mark Positioning: mkmk: P6 Fine positioning of a mark glyph to another mark character Optical Bounds: opbd: P1 Re-positions glyphs at beginning and end of line, for precise justification of text. Left Bounds: lfbd: P1 Re-positions glyphs at end of line. Called by opbd. Right Bounds ...