Blender Git Loki

BMesh: edge-net split, edge selection error

In practice I couldn't make this cause a bug,
however it's a logical regression in fix for T48716.

Thanks to Francesc Juhe for finding.

fix edge shader input

OpenGL: new mesh draw routines for new viewport

Totally WIP.

Started with copies of legacy routines, modified to use the new shaders & batch cache. Not all features are implemented; this is why we keep legacy viewport around during development!

Merge branch 'master' into fluid-mantaflow

[msvc] make.bat - create a build.log in the build directory

Cycles: Fix for fix (tm)

Sorry guys, for some reason read the expression back-to-front
and did wrong fix :S

Cycles: Fix typo in previous commit for BVH improvements

Fix T49815: Blender always reverts to RGBA when using Save As Image.

`BKE_imformat_defaults()` was doing some weird black magic based on
imbuf's channels, instead of merely copying imbuf's planes here...

Cycles: Replace OpenCL atomic functions with own versions

Cycles: Replace OpenCL work item functions with own versions

API: Fix Links

Self-explanatory. to find broken links run `sphinx-build -b linkcheck sphinx-in sphinx-out`

Reviewers: mont29

Tags: #bf_blender, #python, #infrastructure:_websites

Differential Revision: https://developer.blender.org/D2297

Partial fix for T49836: Camera DOF properties not updating via graph editor

Do this for the new dependency graph: was missing handle of OB_UPDATE_TIME in tag update.

Hopefully it's all correct still.

Old dependency graph needs work, but i'm tempting to call it unsupported and move on
to 2.8 branch.

Cycles: Enable SSE math optimization for AVX kernels

This gives about 5% speedup for AVX processors.

Benefit of such optimization on other microarchitectures is still
under investigation.

Cycles: Use new SSE version of offset calculation for all QBVH flavors

Gives up to ~1% speedup again.

While it seems to be small, still nice since the code now is actually more
clean that it used to be before.

Cycles: Rearrange split kernel code to move all logic out of OpenCL kernel files

We need all logic in a place that can be used when building for other devices
besides OpenCL. This leaves things a little messy at the moment, code
deduplication and general clean up can happen later.

Cycles: Move QBVH near/far offset calculation to an utility function

Just preparing for new optimization to be used in all traversal implementation.

Should be no measurable difference.

Cycles: Add code to register kernel functions

Makes it easy to retrieve kernel functions for different architectures without
needing large ifdef chains everywhere.

Cycles: BVH-related SSE optimization

Several ideas here:

- Optimize calculation of near_{x,y,z} in a way that does not require
3 if() statements per update, which avoids negative effect of wrong
branch prediction.

- Optimization of direction clamping for BVH.

- Optimization of point/direction transform.

Brings ~1.5% speedup again depending on a scene (unfortunately, this
speedup can't be sum across all previous commits because speedup of
each of the changes varies from scene to scene, but it still seems to
be nice solid speedup of few percent on Linux and bigger speedup was
reported on Windows).

Once again ,thanks Maxym for inspiration!

Still TODO: We have multiple places where we need to calculate near
x,y,z indices in BVH, for now it's only done for main BVH traversal.
Will try to move this calculation to an utility function and see if
that can be easily re-used across all the BVH flavors.

Cycles: Avoid branching in SSE version of intersection pre-calculation

Similar to the previous commit, avoid negative effect of bad branch prediction.

Gives measurable performance up to ~2% in tests here.

Once again, thanks to Maxym Dmytrychenko!

Cycles: Implement SSE-optimized path of util_max_axis()

The idea here is to avoid if statements which could cause wrong
branch prediction.

Gives a bit of measurable speedup up to ~1%. Still nice :)

Inspired by Maxym Dmytrychenko, thanks!