UPD Mail Archive: UPD> color planes

UPD> color planes

From: Norbert Schade (norbertschade@oaktech.com)
Date: Wed Jul 18 2001 - 17:14:26 EDT

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    I am carefully implementing the first color features into our format, which is very closely related to raster graphic.
    I am asking for comments on how we should specify planes. We always want to work with RGB values as much as possible.
    I am thinking of three samples:
    1. A monochrome printer
    We'd announce 8 bbp.
    2. A color printer with three colors (RGB).
    I mean that the printer understands RGB. I do not care about the real color components.
    3. A color printer with four of even more colors.
    Think about an inkjet with CMYK color components, perhaps with an additional silver cartridge.
    Not that I expect a UPD to support that from beginning, but the spec should be able to describe all of that.

    So the first plane for 2. would tell the driver that red can be set from 0 to 255, but the other two components are independent.
    The third plane of 3. would tell the driver that red as well as green can be set from 0 to 255, but both values must identical (think in RGB).
    The fourth plane of 3. would tell the driver that all RGB values must be identical. this plane would be specified first, but that's not the question here.

    Is there any standard doing that kind of spec?

    Norbert Schade
    Principle Software Engineer
    Host Software Group
    Oak Technology, Inc.
    10 Presidential Way
    Woburn, MA 01801
    Phone: 1-781-638-7614
    Fax: 1-781-638-7555
    email: norbertschade@oaktech.com

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