Blender Git Loki

Fix T38186: mesh inset didn't follow edge directions for flat surfaces

also improve evenness when the inset direction wasn't exactly between both edges,

Math Lib: minor optimization for angle functions

Fix T38192: OSL got incorrectly enabled in preview render when GPU was selected
for rendering of the main scene.

Fix T38176: can't set vertex coordinate to 0.0 when it's set to 0.0000001.

Empties with Images draw type: add support for movies and image sequences

This adds an ImageUser to such empties with all the typical settings.

Reviewed By: brecht, campbellbarton

Differential Revision: https://developer.blender.org/D108

Cycles: Fix Wave texture difference between OSL and SVM, OSL wasn't using the "Scale" properly for distortion.

Code cleanup / Cycles: Don't pass scale to texture functions, do the multiplication in the function call already.

Ceres: more warnings cleanup

Code Cleanup: replace checks for ima->source with BKE_image_is_animated

Fix T38171: Vertical tabs don't respond to clicks on the left most pixels

Color control for bl_debug_draw functions

Fix T38190: Linux tablet: Issue with XInput/GHOST?

With edits by Campbell, thanks!

Looks like in some cases (driver dependent?), `XDeviceMotionEvent` get generated with only part of expected data
(e.g. only x coordinate, only pressure, etc.), data which did not change since last event being NULL.
We know which data to actually handle with `XDeviceMotionEvent.first_axis` and `XDeviceMotionEvent.axes_count` values.

Reviewed by: campbellbarton

Differential Revision: https://developer.blender.org/D208

Fix cycles texture crash on win x86-64 + msvc 11

Use union for __m128 aliasing; while gcc supports no-strict-aliasing attribute, unions are the most common way to deal with __m128 in msvc.

Fix crash happening on render after recent imbuf PERSISTENT flag

fix compilation for mingw-w64

Re-bundle new Ceres library

- Fixes some harmless issues (in cases blender doesn't use Ceres yet)
- Fixes some compilation warnings

UI Icons: store icons in git as uncompressed pixmaps (D196)

this allows for updating icons without committing a new PNG each time
(which is inefficient with git). The data files are converted into a
PNG at builds time and used just as they were before.

Fix T37886: Material does no update when changing keyframes in dopesheet

It was a missing fcurve evaluation in scene update function which lead to
materials only being updated on frame change.

Added the same exception as we've got for the scene animation. It only
runs when there're materials tagged for the update, so wouldn't expect
speed regressions or so.

Fix T38040: Crash after loading big image file in compositor

Issue was caused by cache limitor removing viewer image buffer
from the memory during compositing. Now made it so all viewer
images are persistent in the memory.

This solves the crash mentioned above and also makes it so
render/compo results are never lost.

Further tweaks are possible, but pretty much happy now, at
least no stoppers for work are there.

UI Icons: use a python script rather then a shell (for non unix systems)