Review Request: Implement line smoothing using sigetch's algorithm

[Boudewijn Rempt]

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http://git.reviewboard.kde.org/r/108049/
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Review request for Calligra, Cyrille Berger Skott, Dmitry Kazakov, Lukáš Tvrdý, and Sven Langkamp.


Description
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This patch ports the smoothing algorithm from http://www24.atwiki.jp/sigetch_2007/pages/17.html (as implemented in Gimp 2.8) to Krita. The previous smoothing algorithm now is the unsmoothed default, and the old completely unsmoothed option has gone.


This addresses bug 281267.
    http://bugs.kde.org/show_bug.cgi?id=281267


Diffs
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  krita/image/brushengine/kis_paint_information.h 0142a33 
  krita/image/kis_distance_information.h c1ab409 
  krita/plugins/paintops/libpaintop/sensors/kis_dynamic_sensors.cc 16473f5 
  krita/plugins/tools/defaulttools/kis_tool_brush.h f849233 
  krita/plugins/tools/defaulttools/kis_tool_brush.cc 536b81d 
  krita/ui/tool/kis_tool_freehand.h ee915d8 
  krita/ui/tool/kis_tool_freehand.cc 5640a4b 
  krita/ui/tool/kis_tool_freehand_helper.h 4978c85 
  krita/ui/tool/kis_tool_freehand_helper.cpp dde51ea 

Diff: http://git.reviewboard.kde.org/r/108049/diff/


Testing
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Animtim has tested the branch:

14:00:14 < Animtim_> boud: perfect


Thanks,

Boudewijn Rempt

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