Blender Git Loki

Code cleanup / Cycles / Object Attributes:
* Change some long "else if" conditions into switch case.

Fix #34877: The render status feedback (progress bar) does not take into account specific Renderlayer samples

style cleanup

White space fixes (to make a diff from the trunk cleaner).

Fix #34679: cycles image texture alpha fringes. New rule is now that color output
will not give straight RGB values if the alpha output is used, so that mixing with
a transparent BSDF gives the correct result.

Keep brush overlays below panels in triple buffer mode.

svn merge ^/trunk/blender -r55813:55815

code cleanup: quiet some warnings and style

svn merge ^/trunk/blender -r55776:55813

fix [#34881] Bad characters in error output (PyConsole) if trying to use a Bmesh UV Layer on a BMVert

code cleanup: use bool's for vgroup and editmode.

More fixes for install_deps.sh under ubuntu 10.04: git package is called "git-core", and 'apt-cache policy' returns a different result than newer versions when no package is found, changed the "available deb package" test to use "apt-cache show" instead.

Stencil dimension control:

* Shift-Rclick and holding right click, x or y will trigger constrained
scaling of overlay. Pressing again will revert to uniform scaling.
* Added operator, visible under the mapping drop menu, to fit stencil
aspect ratio to brush image aspect ratio.
* Made it possible to access stencil attributes from python as vec.x,
vec.y. Thanks to kgeogeo for pointing out!

First fix for install_deps and ubuntu 10.04 (no libtiff5, only libtiff4, wonder why this package does not work as jpeg or png ones)...

This allows compilation of OIIO, install_deps.sh still working though (on this old OS, all libs have to be compiled, takes time... :/).

Patch from kgeogeo:

* Change coordinates of stencil to float, helps with precision during
property manuipulations
* Expose stencil properties to RNA.

Fix #34873, Custom min/max node values get reset randomly while working and on save and quit. Node group socket interface was not storing the default_value struct in writefile.c, forgot to add this back when returning to DNA data for node sockets.

Fixed typo in OCIO GLSL module, was using address to a pointer..

Fix for compositor bug found by Ton Roosendaal. Color Balance node was using wrong socket index to map the operation socket to the UI node socket.

Fix #34872: Every images are displayed as black in UV/image editor

Issue was caused by some mesa drivers does not support GL_RGBA16F.

Now added check around glTexImage2D to verify whether requested
internal format is actually supported. If not blender will fall
back to non-GLSL image display.

Update libmv to current upstream version

- Solves some strict compilation warning
- Style/code cleanup