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Jeroen Bakker 2f6257fd7f Cycles/OpenCL: Compile Kernels During Scene Update ...

The main goals of this change is faster starting when using foreground
rendering.

This patch will build kernels in parallel to the update process of
the scene. When these optimized kernels are not available (yet) an AO
kernel will be used.

These AO kernels are fast to compile (3-7 seconds) and can be
reused by all scenes. When the final kernels become available we
will switch to these kernels.

In background mode the AO kernels will not be used.
Some kernels are being used during Scene update (displace, background
light). When these kernels are being used the process can halt until
these become available.

Reviewed By: brecht, #cycles

Maniphest Tasks: T61752

Differential Revision: https://developer.blender.org/D4428

2019-03-15 16:18:21 +01:00

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