Subject:
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Re: LPub mask generation
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Newsgroups:
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lugnet.cad.dev
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Date:
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Thu, 16 Sep 2004 15:49:49 GMT
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Viewed:
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1558 times
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Travis Cobbs wrote:
> I'm not entirely sure, but I'm pretty sure you can create a 32bpp BMP
> file. Normally, 8 bits in each pixel would then be ignored. However,
> I don't see any reason the data wouldn't be there for you to
> interpret yourself.
Careful! A *Windows* color value uses the high bit to indicate that the rest
is an index into the 'System Color Palette' and not a RGB value at all (In
Delphi you have ColorToRGB() to get the RGB value from such a 'color').
I'm not at all sure that you can successfully use the high byte in a
*Windows* .BMP, at least not with the standard routines for loading/saving
bitmaps.
--
Anders Isaksson, Sweden
BlockCAD: http://w1.161.telia.com/~u16122508/proglego.htm
Gallery: http://w1.161.telia.com/~u16122508/gallery/index.htm
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Message is in Reply To:
 | | Re: LPub mask generation
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| (...) I'm not entirely sure, but I'm pretty sure you can create a 32bpp BMP file. Normally, 8 bits in each pixel would then be ignored. However, I don't see any reason the data wouldn't be there for you to interpret yourself. --Travis Cobbs (20 years ago, 15-Sep-04, to lugnet.cad.dev)
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