Fix results of Nearest Neighbour filter
57c3194c1c8a
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Authored by tymond on Mar 28 2019, 1:42 PM.

Description

Fix results of Nearest Neighbour filter

Summary:
Before this patch the NN filter would create intermediate colors
in some circumstances, especially when scaling with the scale <50%.
Now the filter will choose one of the colors around instead of
blending colors around to get the result color.

BUG:401788

Test Plan:

added tests to test the behaviour of NN filter
testing on the image: http://www.bealecorner.org/red/test-patterns/star-chart-bars144-600dpi.png
testing on the image from bug report

Reviewers: dkazakov, Krita

Reviewed By: dkazakov, Krita

Tags: Krita

Differential Revision: https://phabricator.kde.org/D20246

Details

Committed

tymond

Apr 5 2019, 8:33 AM

Reviewer

Krita

Differential Revision

D20246: Fix results of Nearest Neighbour filter

Parents

R37:0cf7c069e3dc: Fix swizzling when rendering QPainter on QOpenGLWidget with Angle

Branches

Unknown

Tags

Unknown

References

refs/keep-around/57c3194c1c8aaf9b17fd8f080533610c38a626a7

tymond committed R37:57c3194c1c8a: Fix results of Nearest Neighbour filter (authored by tymond).Apr 5 2019, 8:33 AM

tymond mentioned this in R37:f54b48bb6db2: Fix transform worker tests failing because of NN.Aug 14 2019, 7:50 PM

rempt mentioned this in R37:dd4d873f75bb: Fix transform worker tests failing because of NN.Aug 15 2019, 7:55 AM

Changes (7)

				Path	Packages
	M			libs/image/kis_filter_strategy.cc
	M			libs/image/kis_filter_strategy.h
	M			libs/image/kis_filter_weights_applicator.h
	M			libs/image/kis_filter_weights_buffer.h
	M			libs/image/kis_transform_worker.cc
	M			libs/image/tests/kis_filter_weights_applicator_test.cpp
	M			libs/image/tests/kis_filter_weights_applicator_test.h