Blender Git Loki

Use new 'copy_from_render()' Image func to avoid saving previews render on disk and then reloading.

Merge branch 'multi_previews_id' into temp-sybren-poselib

Add copy_from_render to Image RNA API, allows to get 'real' usable image out of render_result one.

BMesh: fix edge-rotate with w/ flipped faces

Edge-rotate would randomly flip one of the faces to match the other.

Also maintain active-face when rotating the edge.

BMesh: fix edge-rotation selection state bug

Failed edge rotation could leave unselected edge between selected faces,
also report warning when edges fail to be rotated.

Update code for latest multi_preview changes.

Implemented the thin surface diffuse part.

BMesh: replace iterator with BM_face_vert_share_loop

BMesh: remove redundant argument

Merge branch 'multi_previews_id' into temp-sybren-poselib

Partially revert rBd089bfa9f094.

For now, we do want to keep direct access to raw data as ints/floats.
Time will say whether we want to keep those in final version or not.

Also, minor tweaks to 'set from image' functions.

Ensure given frame index is valid in drawing icon code.

Revert "Somewhat gracefully handle frame index out of bound error."

This is not to be handled in BKE, but in calling code, BKE only asserts
values are valid.

This reverts commit e3fd455d3293f7b8bd15491a3e0193002b648abf.

Merge branch 'master' into multi_previews_id

Cycles: De-duplicate image loading functions

The code was templated already, so don't see big reason to have
3 versions of templated functions. It was giving some extra code
to maintain and in fact already had divergency for support of huge
image resolution (missing size_t cast in byte image loading).

There should be no changes visible by artists.

Cycles: Store CPU kernel function pointers in objects to clean up the code

With the number of kernel functions that's currently needed, it was just getting to messy.
This commit is based on D1825.

Cycles: Implement NLM-weight filtering kernel

Cycles: Split up the estimate_params kernel

Cycles: Add a NLM filter for testing purposes

Cycles: Split up the denoising feature row functions