Blender Git Loki

Use regular header guards in GPU

Cycles: Split BVH implementations into separate files

Cycles: Use more explicit and commonly used names for BVH structures

This renames BinaryBVH to BVH2 and QBVH to BVH8. There is no user measurable
difference, but allows us to add more types of BVH trees such as BVH8.

OpenGL: implement 2D with 4x4 matrices

... even though 3x3 feels better.

This is a compromise to get core profile up & running sooner. Eventually I'd like to finish the original 3x3 plans, but this commit will let us get on with other tasks.

External API stays (almost) the same. Our GLSL shaders can use this without any changes.

Part of T49450 and T51164

use new 3D matrix impl in draw manager

These functions mark the beginning and end of 3D drawing, causing the matrix API to use our own implementation instead of legacy OpenGL.

Part of T49450

Gawain: look up array uniforms correctly

Look up "name[0]" when asked for "name", since that marks the beginning of the array.

We're comparing to the name stored in ShaderInterface which comes from glGetActiveUniform.

cleanup image drawing setup

Gawain: use ShaderInterface to manage uniforms

This eliminates tons of glGetUniformLocation calls from the drawing loop. Vast majority of code can keep making the same function calls. They're just faster now!

- Batch_Uniform*
- immUniform*
- gpuBindMatrices
- and others

Gawain: add immUniform4iv

Needed soon by OCIO.

Gawain: add (temp) legacy GLSL support to ShaderInterface

A temporary measure needed by GPU_basic_shader.

Part of T51164

Gawain: improve ShaderInterface

- builtin uniforms match what Blender needs
- set input counts in struct (stupid mistake)
- look up uniforms by name
- look up builtin uniforms by enum
- check attrib/uniform locations for error

GLSL: rename edit_overlay -> edit_mesh_overlay

Avoid confusion with overlays with non-mesh types

Use 'safe' macros for common free operation

Same as MEM_SAFE_FREE macro,
checks for NULL, runs free then sets NULL.

Blocks of code that do this many times are noisy and likely
errors here wouldn't be noticed immediately.

Also NULL's static vars which were being left set.

fix drawing file column dividers (T51189)

Problem was an edge case where vertex_ct logic and draw logic disagreed on how many dividers to draw.

Fix: copy draw logic to earlier vertex_ct

I also skip any drawing or setup if vertex_ct = 0, and set color attribute only for each line's provoking vertex. Small optimizations but these things add up.

Fix T51188 compilation errors in Windows

Task scheduler: Prevent race condition for the pools created from non-main thread

We can not re-use anything for such pools, because we will know nothing about whether
the main thread is sleeping or not. So we identify such threads as 0, but we don't
use main thread's TLS.

This fixes dead-locks and crashes reported by Luca when doing playblasts.

Layer / Outliner / Depsgraph: update depsgraph when running outliner operators

Fix T50227: Alembic uv export/load issue

Previously only a CD_MLOOPUV custom data layer was created. Now we also
create the accompanying CD_MTEXPOLY layer too.

Fix T51184: Crash of Blender when I try to join an object with one that has booleans modifiers

Outliner: Draw nested collections before objects of a collection

Collections may contain a huge list of objects, would be annoying having
to scroll over it all the time to get to the nested collections.