Re: Styled Text Library - Getting RGB from style data
Re: Styled Text Library - Getting RGB from style data
- Subject: Re: Styled Text Library - Getting RGB from style data
- From: Arthur J Knapp <email@hidden>
- Date: Mon, 11 Mar 2002 09:53:10 -0500
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Date: Sun, 10 Mar 2002 22:37:46 +1100
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Subject: Styled Text Library - Getting RGB from style data
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From: Malcolm Fitzgerald <email@hidden>
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To: <email@hidden>
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Arthur,
;-)
Ya know, it is surprising convenient to have one's personal email
directed to the applescript-users list...
;-)
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I'm starting to play with the styled text scripts that you sent. They're
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working quite well enough for the simple, small pieces of styled text that I
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need to convert.
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I ran foul of your color-conversion hack though.
So did Nigel Garvey...
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... Your notes describe the
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work around that you generated (see below).
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Your "item 2 of" hack produced all sorts of odd results.
Yeah, it was a bad work-around... :(
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enough though and set to work. I finally realised that applescript's RGB
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color class wants numbers between 0-65535 and that two bytes were needed.
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Web safe colours couldn't be assured, but accuracy would be.
Right, an RGB is a collection of 3 unsigned 2-byte integers. My problem
was that I didn't initially understand how to go from:
Red Green Blue
00 00 AA AA FF FF
to this:
<font color="#00AAFF">, ie:
Red Green Blue
00 AA FF
The answer is to use the most-significant byte. You can obtain this
value from an integer in the range of 0-6553 simply by div-ing by 256:
{0, 32768, 4528} --> {0 div 256, 32768 div 256, 4528 div 256} -->
{0, 128, 17} --> 00 80 11
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-- 00 00 00 33 00 12 00 0D 00 04 03 4C 00 0F 00 00 33 33 FF FF
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-- ??? The color info in these contains more data than
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-- in a web hexidecimal triplet. I need to research a
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-- correct conversion process. "Web-safe" colors seem
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-- to always be the hex-triplet doubled, ie:
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--
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-- <body bgcolor="#00AAFF">
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--
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-- translates in RGB to
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--
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-- 0000AAAAFFFF
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--
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-- so my "hack" is to just grab one of the two integers
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-- of the RGB,
So in this case, the better "hack" would be to simply grab the first byte.
{ Arthur J. Knapp, of <
http://www.STELLARViSIONs.com>
<
mailto:email@hidden>
try
<
http://www.eremita.demon.co.uk/scripting/applescript/>
on error number -128
end try
}
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