Branch: refs/heads/master
Home: https://github.com/synfig/synfig
Commit: 58f522ec25d845ee7734dab0ca385a8ff5ccfd3c
https://github.com/synfig/synfig/commit/58f522ec25d845ee7734dab0ca385a8ff5ccfd3c
Author: rodolforg <[email protected]>
Date: 2024-04-29 (Mon, 29 Apr 2024)
Changed paths:
M synfig-core/src/synfig/layers/layer_motionblur.cpp
Log Message:
-----------
fix(MotionBlur): undefined behavior when subsample range is 0 (#3347)
For linear subsampling type, there is an undefined behavior
when both subsample (start and end) amounts are 0.
Synfig version 1.0.2: *none* is drawn!
Synfig version 1.2.1: a pale gray rectangle is drawn
Synfig version 1.4.3: a black gray rectangle is drawn
Anyway, this commit fixes the case when both are 0, by drawing
the context without any motion blur effect.
Note:
If they (the subsample amounts) are equal, but both nonzero, the
canvas is normally drawn.
Behavior is not the same between 1.0.2 and >=1.2.1 though.
The motion trail has a different number of 'echoes':
1.0.2 has less than the next releases.
fix #3345
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