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Conference bulova::decw_jan-89_to_nov-90

Title:DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:STAR::VATNE
Created:Mon Oct 30 1989
Last Modified:Mon Dec 31 1990
Last Successful Update:Fri Jun 06 1997
Number of topics:3726
Total number of notes:19516

2132.0. "Print / Capture Screen to Color (SIXEL) Printer Question" by MUTTON::LAMB (Peter Lamb - FSG Santa Clara) Wed Jan 24 1990 16:06

Hello,

I have a customer that is asking me about this.  They are very interested 
in the capability that is in 5.3 to do this (unfortunatly it still doesn't work
even under 5.3-1)

However, their question is once it does work is there any way to play with the
output color map.  For example when the output file is generated they would
like some way to say if the screen background was gray then print it as
white etc.  

The uses for this should be fairly obvious since as you are now printing in
color if the background of a screen you are coping is in color it would 
presumably try to reproduce it accuratly and this would be a waste of time.

Any ideas,

Peter
T.RTitleUserPersonal
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2132.1EVETPU::KROBINSONIcon do windowsMon Feb 19 1990 16:214
From what I have seen of the color sixel protocol there is no way to do this.
Sixels have no notion of color maps, each sixel has a hardcoded color.

					kathy
2132.2You should be able to change the colorsHANNAH::MESSENGERBob MessengerMon Feb 19 1990 20:1925
Re: .1

I'm not sure why you'd say that, Kathy.  Sixel files do use color map entries
(the equivalent of PseudoColor).  All the customer would have to do would be
to capture the print screen output into a file and edit the file.  The
color definitions are in the form:

	# Pc ; Pu ; Px ; Py ; Pz

where:	Pc is the color index (0 to 255 on the LJ250, although this may
depend on whether it's in high or low density mode).

	Pu is the color coordinate system (1 = HLS, 2 = RGB)

	Px is the hue angle (0 to 360 degrees) in HLS or the red intensity
(0 to 100) in RGB

	Py is the lightness (0 to 100) in HLS or the green intensity in RGB

	Pz is the saturation (0 to 100) in HLS or the blue intensity in RGB

For example, medium blue as color 1 would be #1;1;0;50;100 in HLS or
#1;2;0;0;100 in RGB.

				-- Bob