Blender Git Loki

VSE: Allow GPencil drawing without having a strip loaded

Previously the GPencil strokes were just not drawn (even though they
were generated) until a strip was loaded.

Minor edit to edit-mesh selection bias

only choose verts over edges (not faces)

Cleanup: minor corrections

Fix T44465: Crash using VSE OGL render + Grease Pencil

Likely caused by rBd5f1b9c22233

BMesh: mesh-data picking, general improvements

Generalize logic for vert/edge/face selection:
- index cycling.
- selection bias with mixed modes.

Details:
- Edges now support index cycling (as verts/faces did already)
- Cycling over near elements is now only enabled when the mouse position remains the same.
- No longer do 2 selection passes to perform index cycling.

Fixes:
- Edges behind the view could be selected (surprising nobody reported!)
- Selection bias now only changes the element that gets picked without interning the return distance
(was buggy with mixed modes).

Backdrop strictly shows image result only - it could get influenced by
scopes setting of space if one changed the space type back and forth.

Thanks to Sergey for reporting.

Allow editing of active strip proxy settings again in addition to the
set operator

Cleanup: style

Correct crash in last commit (spacebar search)

Add eyedropper for selecting object & obdata

In addition to the unlink icon to clear a value,
When cleared, show an eyedropper to select objects or object-data
(was already available via the EKey).

Fix T44432: Zoom to mouse fails /w FCurve editor

Fixes for backbuf selection logic

- Fix ED_view3d_backbuf_sample_rect, r_dist was set completely wrong.
- Avoid duplicate calculations picking the nearest edge.
- Bias against picking selected edges is now optional.
- Remove unused callback reading the backbuf.
- Remove unused strict option picking vertices.

Cleanup: use ED_view3d_backbuf_* prefix

Fix T44383: Select face fails in some positions

When mixing vert/edge/face with select-visible,
face selection could fail when not close enough to the center.

This also fixes a bug where the bias for verts over edges would
prefer faces over edges too, making edges harder to pick.

Mixing edge with other selection modes works more predictably now.

Editmesh select nearest fixes

- distance from edge check wasn't clamping 0-1
- vertex bias wasn't taking pixelsize into account.
- index & pass counter were floats

Also some improvements

- use BMesh lookup tables when available.
- use structs to avoid issues getting out of sync.

Cleanup: use macro for common view3d zbuf check

Cleanup: use bool /w flag checks

Guardedalloc: Don't use aligned blocks to calculate memory sloppyness

Aligned memory is allocated with memalign() and malloc_usable_size() can't be
used to measure this block.

CMake: Move performance tests under the cmake option

This way running full sweep of regression tests does not require
waiting for the performance test to finish.

Usual UI messages fixes...