The `AMD Radeon HD 7600M` compiler is usually buggy for Geometry Shaders.
In this case, indexing was causing problems in `gl_in[i].gl_ClipDistance[0]`.
Reviewers: fclem
Differential Revision: https://developer.blender.org/D4700
This removes the large edges and instead use colors to hint in which
selection mode the user is.
The component in each individual selection mode is more prominent to add
more emphasis. The other components are less prominent and dimmed.
A minor default theme changes needed to be made to keep clarity in all
combinations.
Forcing old behavior (no selection mode hit) could be done quite easily
by just making the 2 booleans true (selectFaces and selectEdges).
Reviewers: campbellbarton, billreynish
Reviewed By: campbellbarton, billreynish
Subscribers: ThinkingPolygons
Maniphest Tasks: T1234
Differential Revision: https://developer.blender.org/D4526
Requested by some users who prefer old wireframe precision.
Smooth wires are still enabled by defaults as they don't have a noticeable
perf impact.
Application restart is needed for changes to take effects.
This make it (theoriticaly) compatible with all supported hardware with
consistent results.
Also we now draw the lines with analytic anti-aliasing instead of relying
on MSAA (which offers less benefits in our case).
The remaining aliasing comes from edges cut in half by the mesh which is
not rendered with MSAA. Hopefully this is not too much distracting and only
happen if the face is almost parallel to the view.
This adds a new geometry shader (specific to edit mesh for now) that
reproduces the effect of glLineWidth > 1.0, since this is not supported on
all platform.
This fix could be generalized to other shaders later.
