Blender Git Loki

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

# Conflicts:
# source/blender/draw/engines/eevee/eevee_lightprobes.c

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

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

Eevee: LightCache: Write LightCache to File

This patch does a few things for it to work.
- It port some eevee's struct to DNA for them to be saved in the file.
- Readback the result of the lightcache baking and store it in the scene
struct.

For small scenes, it's okayish to keep the data around in memory but a
better approach would be to save it to disk.

A standard reflection probe is more than 6 MB of data.
Diffuse irradiance grids are relatively small compared to this.

GPUTexture: Refactor to have more flexibility.

New features:
- Get mipmap level size from a texture.
- Use explicit GPUDataFormat to specify how the input (or output) data
is formated when uploading (or reading) texture data.
- Can upload different mipmap level after base level.

Eevee: LightCache: Fix crash when baking with render result window open

Eevee: LightCache: Make render work with no lightcache

This will only show the same thing as the viewport. It will not compute the
actual cache on the fly.

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

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

# Conflicts:
# source/blender/draw/engines/eevee/eevee_render.c

DRW: Codestyle: Add alias for accessing particular matrix in DRWMatrixState

Eevee: LightCache: Add back visibility group.

Eevee: Add back planar reflection.

Fix warning

DRW: Change gl_context_mutex type to TicketMutex

This ensure the viewport is not locked indefinitely when rendering or
baking.

Eevee: Lookdev: Use own lightcache

This makes possible to have different lookdev settings per viewport without
rendering the environment constantly.

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

Eevee: LightCache: Fix a warning, a mistake and two oversight

Eevee: LightCache: Fix fbos created in wrong context.

Eevee: Fix wrong function order

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

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