Blender Git Loki

Merge remote-tracking branch 'origin/blender2.8' into temp-eeveelightcache

# Conflicts:
# source/blender/blenloader/intern/versioning_280.c

Eevee: LightCache: Add UI to control visibility of the lighcache data

For the moment we use a per scene setting for that. We could move it to be
per viewport (as an overlay).

Merge remote-tracking branch 'origin/blender2.8' into temp-eeveelightcache

# Conflicts:
# source/blender/gpu/intern/gpu_texture.c

Eevee: LightCache: Fix sample selection algorithm

DRW: Modify the engines code to work with latest changes

DRW: Refactor ObjectEngineData into DrawData

This is because we will use it to store the update flags from the depsgraph.

Use a similar system as AnimationData where the struct is inserted at a
fixed position after the ID struct.

Eevee: LightCache: Add fallback cache for world if no scene cache found

DRW: Add option to bypass deferred shader compilation

Object Mode: Remove cubemap lightprobes outline

This is because the display code now differs and the outline does not match.
This commit make them uselectable by their display shape (the sphere).

I will revisit this latter.

Eevee: LightProbes: Change/optimize the cubemap probe display

Object Mode: Make the LightProbe Grid samples outlines as dots

This is because this display will not always match the position of the baked
samples. Making it as dots also makes it less flickery.

Eevee: LightProbes: Add back and optimize the irradiance sample display

Eevee: LightCache: Add back progressive rendering.

GPUTexture: Add GPU_texture_read

This is to get the texture content from the GPU memory.

Eevee: LightCache: Finish basic cache support.

Still missing: Multi bounce support.

Eevee: Move cache creation to main thread

This fix freeing hazard and use after free.

Merge remote-tracking branch 'origin/blender2.8' into temp-eeveelightcache

Merge remote-tracking branch 'origin/blender2.8' into temp-eeveelightcache

Eevee: LightCache: Add progress bar and cancelation.

Eevee: LightCache: More work...