Blender Git Loki

Improve creating and saving tiled images

Revert last commit, was temporary

This reverts commit 8eee1a312b308460f8cae3022e87142164a01833.

UI: Change old Grease Pencil Paper and remove color

Now, the color is always white. We still keep internally the color field because maybe we reuse it in the future.

Cycles: WIP: Volumes are not using the light tree.

If a shading point is inside or on the boundary of a volume
then it will use the old sampling method until we have
properly implemented the volume parts of the paper.

Also, the PDF picking probability for volumes have now been
updated properly since the PDF restructure.

Tried to provide the correct shading point and normal to
the MIS calculations. This part needs more work.

Cycles: Light tree optimization

The importance metric calculations now uses the
fast_cos() and fast_acos() functions. This gave
a 1.4x speedup on one of the test scenes.

Cycles: Light tree related bug fixes

- Fixed bug in triangle_light_pdf_area() from PDF refactor
- Early exit if picking prob is zero in tree traversal
- The background index is now an index into the lights
array instead of the distribution array.

Cleanup: Remove occurances of GPULamp

GPUTexture: Fix wrong texture size check

Eevee: Fix assert when baking lightprobes.

The GPU context was freed before all framebuffer attached to it were
deleted.

Fix T56117

Initial work on edge wiggle rewrite

Merge branch 'master' into blender2.8

Subsurf: Correction to origindex

Only enforce origindex to NONE for a generated geometry. For the rest
of geometry rely on CustomData_copy() to set it to the proper value.

This will ensure origindex is set correct for cases when there is an
array modifier prior to subsurf.

Cycles: Initial implementation of detailed statistics

Gathers information about object geometry and textures. Very basic at
this moment, but need to start somewhere.

Things which needs to be included still:

- "Runtime" information, like BVH. While it is not directly controllable
by artists, it's still important to know.

- Device array sizes. Again, not under artists control, but is added to
the overall size.

- Memory peak at different synchronization stages.

At this point it simply prints info to the stdout after F12 is done,
need better control over that too.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D3566

Cycles: Add utility function to query graph node size in bytes

attempt to fix incorrect (bbox) triggering behavior

Separate Paper and Grid and rename

Merge branch 'blender2.8' into greasepencil-object

Conflicts:
source/blender/makesdna/DNA_view3d_types.h

GHOST: Fix SDL backend.

We use a hidden window for each offscreen context we need.

On X11 (linux) it does not show any other windows in the OS task bar
but it might be the case on other operating systems (untested).

Fix snap operator

There was a problem updating the scene due depsgraph missing tags

UI: Move draw on back button after lock options