D19148: Make shadow sizes linear

[Noah Davis]

ndavis added a comment.


  In D19148#417251 <https://phabricator.kde.org/D19148#417251>, @zzag wrote:
  
  > Well, I guess that depends on the light. After all we don't try to model "physically correct" shadows.
  >
  > Anyway, I've asked that question about opacity because most folks do the same thing. Also, this is what I did in kstyle. Even though kstyle and kdecoration shadows look different, I'd like to have the same "model" behind them. In general, I like the idea of decreasing shadow sizes to more saner values, but I'm not quite sure about new opacity values.
  >
  > My thinking behind increasing opacity values was to keep darkness at some "constant" level, e.g. if you increase the blur radius, the darkness will be spreaded more, so to compensate that the opacity is increased.
  
  
  But then we run into a problem where small shadows aren't visible enough to serve their purpose. How about we just get rid of different opacity for different shadows and let the user control that with strength? Then we set the default strength to a value that we think is appropriate for the default shadow size.

REPOSITORY
  R31 Breeze

BRANCH
  shadow-sizes (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D19148

To: ndavis, #vdg, #breeze, ngraham
Cc: filipf, ngraham, zzag, rooty, plasma-devel, jraleigh, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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