Blender Git Loki

Cycles: Speedup by avoiding extra calculations in noise texture when unneeded

Noise texture is now faster when the color socket is unused. Potential for
speedup spotted by @nutel.

Some performance results:

Render Time Before After Difference
Gooseberry benchmark 47:51.34 45:55.57 -4%
Koro 12:24.92 12:18.46 -0.8%
Simple cube (Color socket) 48.53 48.72 +0.3%
Simple cube (Fac socket) 48.74 32.78 -32.7%
Goethe displacement 1:21.18 1:08.47 -15.6%
Cycles brick displacement 3:02.38 2:16.76 -25.0%
Large displacement scene 23:54.12 20:09.62 -15.6%

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D2513

Cleanup: use proper link to the api

OpenGL immediate mode: interface_widgets.c

Added rgba_float_args_set_ch to BLI_math_color.h

OpenGL immediate mode: interface_panel.c

Fix T50718: Regression: Split Normals Render Problem with Cycles

The issue seems to be caused by vertex normal being re-calculated
to something else than loop normal, which also caused wrong loop
normals after re-calculation.

For now issue is solved by preserving CD_NORMAL for loops after
split_faces() is finished, so render engine can access original
proper value.

Mesh faces split: Add missing vertex normal copy

Fix T50719: Memory usage won't reset to zero while re-rendering on two video cards

Was only visible with Persistent Images option ON.

Use Git submodule tracking feature

This way we can point submodules to different branches.

There are two side-effects to this:

- Git 1.8.2 becomes the minimal required version now
to support this feature.

- Not sure how doing local changes in submodules followed
by `make update` will behave. We don't use explicit rebase
now.

Perhaps this is not so bad, since it was already quite
dangerous thing to do.

Point addons to 2.8 branch

Clay Engine: Use G.debug_value to test cache performance

Use debug 666 for cache without instance buffer caching.
Use debug 667 for cache with instance buffer caching.

OpenGL immediate mode: transform_manipulator.c

OpenGL: fix MVP matrix order

Numbers were correct but names were mixed up.

Fix a few compiler warnings with macOS / clang.

Fix T50564: 3D view panning with scroll wheel inconsistent with dragging.

fix OpenGL line count in VSE backdrop

Fixup for last commit :/

Fix crash introduced in engine separation (50fb3ea3)

Basically DEG_OBJECT_ITER (or rather,
BKE_scene_layer_engine_settings_update) wasn't creating
Object->collection_settings data for invisible objects.

Now I'm removing those objects from the loop entirely. If we are to
bring them back we need to either create CollectionEngineSettings dat
from them or to skip them in DRW_mode_cache_populate.

OpenGL: further mask_draw tweaks

- smooth round points
- fewer state changes
- minor cleanup & warning fix

This is a follow-up to rB84141f27a668

Fix bplayer (c)

Fix building without Clay engine.