planarˈpleɪ nər
planar
English Definitions:
planar, two-dimensional (adj)
involving two dimensions
planar (Adjective)
Of or pertaining to a plane.
planar (Adjective)
Flat, two-dimensional.
planar (Adjective)
Able to be embedded in the plane with no edges intersecting.
Planar
In computer graphics, planar is the method of representing pixel colours with several bitplanes of RAM. Each bit in a bitplane is related to one pixel on the screen. Unlike Chunky, Highcolour or Truecolour graphics, the whole data for an individual pixel isn't in one specific location in RAM, but spread across the bitplanes that make up the display. For example, on a chunky display, each byte represents one pixel. Three pixels in a row would be stored as follows, where up to 256 different colours are available: Byte 0: 00000000 = Black pixel Byte 1: 00000001 = Blue pixel Byte 2: 00000010 = Green pixel Whereas a planar data store could use 2 bitplanes, providing for a 4 colour display: A row of 8 black pixels: Plane 0, Byte 0: 00000000 Plane 1, Byte 0: 00000000 A row of 1 blue pixel, 2 black pixels, 1 green pixel, 4 black pixels: Plane 0, Byte 0: 10000000 Plane 1, Byte 0: 00010000 Adding a third plane would make 2³=8 colours available. Where fewer than 256 colours are needed, planar graphics are more economical in RAM compared with chunky graphics. Example: to display 8 colours using 3 bitplanes, so each pixel has 3 bits assigned to it instead of 8, reduces memory and bandwidth requirements by 62.5%. This saving was most significant in the 80s and early 90s when fast RAM was expensive and most computer graphics displayed fewer than 256 colours.
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"planar." Kamus.net. STANDS4 LLC, 2024. Web. 23 Apr. 2024. <https://www.kamus.net/english/planar>.
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