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Fix T72688: Vertex Group Weights in Edit Mode Occludes In Front Armatures

Due to legacy this overlay was implemented twice (Edit Mesh and Weight
Painting) with different results. This patch consolidates both drawing
and uses only the Weight Painting drawing.

Fix T72688: Vertex Group Weights in Edit Mode Occludes In Front Armatures

Due to legacy this overlay was implemented twice (Edit Mesh and Weight
Painting) with different results. This patch consolidates both drawing
and uses only the Weight Painting drawing.

Reviewed By: Clément Foucault

Differential Revision: https://developer.blender.org/D7289

Fix T75244: Screw Modifier Crash

Draw batch extraction wrongly assumed that when mapped extraction
happened that all original data could be found. This is not the case as
mapped extraction is also enabled when part of the data is present.

This fix does additional nullptr checks.

Fix T73513: Facing Overlay Intervene With Selection

Do not draw the facing overlay during selection.

Fix T74898: Multiresolution Ghost After Orbiting

EEVEE and Workbench both had the same issue that they continue with the
last sample when leaving navigating. This is ok for regular meshes as
they are all the same. For multiresolution it ain't as a low res version
of the mesh is used during navigation.

This patch also resets the AA samples when the user leaves navigation.

NormalOverlay: Center Dot Normal Drawing With Modifiers

When using generative modifiers too many center dots were rendered in
the normal overlay. This patch only renders the normals of original
center dots.

Known issue: decoding the `norAndFlag` has issues on Intel GPU.

Normal Overlay: Hide Normals Of Generated Loops

The loop normals were always drawn. We used to only draw the normals if
it was mapped to an original loop of the mesh. Due to recent changes we
can not find the correct loop and decide if we need to draw them.

Note still need to check the face dots normals. This is more complicated
as facedot normals needs to be encoded in a different way

Fix T75053: Paint Overlay Show Modified Wires and Edges

The paint mask overlay showed the wires and edges of the final mesh.
This change will only draw wires and edges that are mapped to the
original mesh.

This change enables mapping data in regular Mesh extraction. This
can also be used for better drawing of the normal overlay.

Reviewed By: Clément Foucault

Differential Revision: https://developer.blender.org/D7277

Fix T67888: Incorrect Wireframe After Applying SubSurf/MultiRes

Show control edges stores the control edges in the mesh which is
picked up by the draw manager. When applyng a subsurf (or multires) we
don't want that data present in the base mesh. Any rebuilding of the mesh
would overwrite the data anyway.

This patch introduces a new flag for applying modifiers
that can be checked to ignore storing display specific data in
the base mesh.

Reviewed By: Brecht van Lommel

Differential Revision: https://developer.blender.org/D7163