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Subject: RE: [office] Giving 120%
The only way that I could make sense of this, assuming -100% goes to dark and +100% goes to full-on, is that the % applies to the range between the current setting and the extreme. That is, for the example of a channel strength of 26 (0x1A), -% takes chunks out of the range 0 to 26, and +% adds chunks to the range 26 to 255 (assuming the usual RGB values), so -100% is always 0 and +100% is always 255. This is a very strange way to do it, but I am not a subject-matter expert on how filter settings adjust color levels in graphics work. All this tells me is that we still don't have the full story. Is there a JIRA issue on this? - Dennis -----Original Message----- From: Andreas J Guelzow [mailto:aguelzow@math.concordia.ab.ca] Sent: Friday, June 26, 2009 08:56 To: office@lists.oasis-open.org Subject: Re: [office] Giving 120% On Fri, 2009-06-26 at 05:41 -0400, Patrick Durusau wrote: > draw:red, draw:green, draw:blue all control RGB channels. The color of > any image is set elsewhere and these three attributes represent > *changes* in the RGB channels for the rendering of that image. > > Thus, a setting of -100% for draw:red, allows no input from the red > channel. A setting of 0%, does not modify the value of the red channel > for this image. A setting of 100% sets the red channel to maximum. On second look, this does not make sense. Suppose we are starting of with a channel strength of 1A for blue, we can then obviously only going down to 00 which would be -100%. +100% should be 2B. SO we are not allowing this to be turned up even further? If we are allowing -100% we really should at the other end be open (or at least go to _much_ further. Andreas > -- Andreas J. Guelzow Concordia University College of Alberta --------------------------------------------------------------------- To unsubscribe from this mail list, you must leave the OASIS TC that generates this mail. Follow this link to all your TCs in OASIS at: https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php
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