VSE timeline widget drawing is done in "timeline space" (x: frames,
y: channels), but that can have precision issues at large frames,
when "pixel size features" (outlines, borders) need to get evaluated
inside a shader.
This can lead to inconsistent border sizes between neighboring strips,
e.g. sometimes it would be 2 pixels, but sometiems 3 pixels. I've seen
this mostly happen when frames get into 100'000+ range.
To address this, switch timeline widget drawing to be in window pixel
space. This avoids the issue since coordinates to draw the strip
widgets become "up to several thousand" range, not arbitrarily large.
Pull Request: https://projects.blender.org/blender/blender/pulls/125220
With selected strips, it is not clear where one of them begins and another
ends since their outlines are right next to each other.
This changes strip look so that:
- All strips have consistent dark 1pt outline at the outer edge.
- Selected strips have 2pt highlight inside said outer edge.
- Selected strips also have a 1pt wide 33% opacity darker line inside the
selection highlight (and inside possible handles). To improve readability
in case strip content happens to be similar to selection/active color.
Images in PR.
Pull Request: https://projects.blender.org/blender/blender/pulls/123431
Now the strip outline (1 point for unselected strips, 2 point outline +
1 pt dark inset) takes monitor DPI / user preference line width into
account, via the usual U.pixelsize machinery.
Pull Request: https://projects.blender.org/blender/blender/pulls/123369
Strips still have sharp corners when you're dragging them from file browser and
switch to rounded when dropped. Fix by using the same drawing code (and shader)
as regular timeline drawing path.
Pull Request: https://projects.blender.org/blender/blender/pulls/123013
