Blender Git Loki

Merge branch 'blender2.8' into greasepencil-object

Remove inverse matrix in drawing

With new shaders, it is better to use a object global matrix and do not calculate for each point the position.

Fix RNA LayerCollectionEngineSettingsClay not inheriting from LayerCollectionSettings.

Was hence missing the 'name' property, which broke the 'dict-like'
behavior of Scene.collection_properties.

WIP: Add basic editing points to strokes

Merge branch 'master' into blender2.8

Add red alert in UI controls for datablock pointer properties

Draw Engine: Draw sets recursively

Matchers regular viewport behavior

Datablock ID Properties

The absence of datablock properties "will certainly be resolved soon as the need for them is becoming obvious" said the [[http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.67/Python_Nodes|Python Nodes release notes]]. So this patch allows Python scripts to create ID Properties which reference datablocks.
This functionality is implemented for `PointerProperty` and now such properties can be created with Python.

In addition to the standard update callback, `PointerProperty` can have a `poll` callback (standard RNA) which is useful for search menus. For details see the test included in this patch.

Original author: @artfunkel

Alexander (Blend4Web Team)

Reviewers: brecht, artfunkel, mont29, campbellbarton

Reviewed By: mont29, campbellbarton

Subscribers: jta, sergey, campbellbarton, wisaac, poseidon4o, mont29, homyachetser, Evgeny_Rodygin, AlexKowel, yurikovelenov, fjuhec, sharlybg, cardboard, duarteframos, blueprintrandom, a.romanov, BYOB, disnel, aditiapratama, bliblubli, dfelinto, lukastoenne

Maniphest Tasks: T37754

Differential Revision: https://developer.blender.org/D113

Cycles: Header cleanup in BVH: move self header to be the first one

This makes us more sure that header files are more self-sufficient.

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