Fix for 2.66a
With help from Daniel Stokes and Mitchell Stokes.
This bug always existed in OSX, but started showing up in Windows and Linux on review (54745 + 54747)
[the patch to enable alpha buffer for all OSs]
A better fix would be to use RAS_IRasterizer::SetAlphaBlend(GPU_BLEND_SOLID);
but I think gpu_verify_alpha_blend() is not switching to SOLID because
GTS.alphablend is GPU_BLEND_SOLID (even though GL_ALPHA_TEST is enabled).
Anyways, this is not something worth tackling now, since in terms of functionality it shouldn't matter.
Instead of flagging the rigid body world for frame update just call
BKE_rigidbody_do_simulation() recursively for all scenes.
This avoids having to constantly check if the simulation needs to be
updated.
The rigid body world could be rebuilt on start frame and one frame after
start frame. The latter was necessary sice animation playback usually
doesn't start at start frame.
This lead to different simulations depending on which frame the
simulaton was rebuilt when animation was involved.
Now we only rebuild the world on start frame.
This is actually tricky to do since, as mentioned above, animation
playback starts on second frame. To work around this we rebuild the
world before the actual update.
The alternative would be to rebuld the world on every simulation change
(like the other simulations do it) but this is an expensive operation
and would be too slow.
to support more than 2 UV maps. This code indirectly depended on the order of
OpenGL attribute ID's assigned by the OpenGL driver being the same as the
attributes being declared in the GLSL shader code, which is not always the case.
Fix for 2.66a
Screencast could be started twice in a row, but it then also added two handlers
for drawing an overlay circle around mouse cursor. After ending the screencast,
this circle then kept being drawn.
Added compatibility option "Straight Alpha Output" to image input node
When this option is enabled, image input node will convert float buffer
to straight alpha.
This is not what you'll usually want with new alpha pipeline, nit this
is needed to preserve compatibility with older files saved in 2.65.
In that version byte image are resulting with straight alpha passing
to the compositor and alpha-overing required extra premultiplication
of inputs.
So, that's why Straight Alpha Output is needed -- it's set in versioning
code for byte node images so they'll still output straight alpha.
This option is currently only available in N-panel.
Additional change: added Alpha Mode for image input node to N-panel.
- optional, select between name/keybinding.
- when key input can't be parsed, alert red to give the user some feedback.
- key shortcut parsing could be improved or swapped out for button which grabs shortcut.
and use_expand properly. These are hardcoded to shift and ctrl to make them
work when clicking buttons or menus. Now it checks if the properties are set,
which is still not ideal but makes it possible to override them from the
key configuration.
