This PR adds drawing support to the render graph. It adds support for
draw, indirect draw, indexed draw and indexed indirect draw.
Draw commands can only be executed within a rendering scope. Data
transfer commands and dispatch commands cannot be executed within a
rendering scope. Blender can still send in commands in any order and
the render graph needs to find out the best order to minimize context
switches (rendering/begin/end). This is the responsibility of the
scheduler.
The scheduler will push data transfer and dispatch commands outside the
rendering scope:
- data transfer and dispatch commands at the beginning are done before
the rendering begin.
- data transfer and dispatch commands at the end are done after the
rendering end.
- data transfer and dispatches in between draw commands will be pushed
to the beginning if they are not yet being used.
- for all other data transfer and dispatch commands the rendering is
suspenderd and will be continued afterwards.
Within a rendering context it is not allowed to perform synchronization
commands. Any synchronization commands inside a rendering scope will be
performed before the rendering scope begins. Nodes are now organized
in groups to simplify the code around this area.
Pull Request: https://projects.blender.org/blender/blender/pulls/123168
22d352dacc