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Compositor: Port GPU Vector Blur to CPU #120135

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Omar Emara merged 12 commits from OmarEmaraDev/blender:cpu-vector-blur into main 2024-04-05 09:48:12 +02:00
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Omar Emara commented 2024-04-01 11:19:44 +02:00
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This patch ports the GPU Vector Blur node to the CPU, which is in turn
ported from EEVEE. This is a breaking change since it produces different
motion blur results that are more similar to EEVEE's motion blur.
Further, the Curved, Minimum, and Maximum options were removed on the
user level since they are not used in the new implementation.

There are no significant changes to the code, except in the max velocity
computation as well as the velocity dilation passes. The GPU code uses
atomic indirection buffers, while the CPU runs single threaded for the
dilation pass, since it is a fast pass anyways. However, we impose
artificial constraints on the precision of the dilation process for
compatibility with the atomic implementation.

There are still tiny differences between CPU and GPU that I haven't been
able to solve, but I shall solve them in a later patch.

This patch ports the GPU Vector Blur node to the CPU, which is in turn ported from EEVEE. This is a breaking change since it produces different motion blur results that are more similar to EEVEE's motion blur. Further, the Curved, Minimum, and Maximum options were removed on the user level since they are not used in the new implementation. There are no significant changes to the code, except in the max velocity computation as well as the velocity dilation passes. The GPU code uses atomic indirection buffers, while the CPU runs single threaded for the dilation pass, since it is a fast pass anyways. However, we impose artificial constraints on the precision of the dilation process for compatibility with the atomic implementation. There are still tiny differences between CPU and GPU that I haven't been able to solve, but I shall solve them in a later patch.
Omar Emara added the
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Omar Emara added 1 commit 2024-04-01 11:19:54 +02:00
f13a31d4b2 Compositor: Port GPU Vector Blur to CPU 
This patch ports the GPU Vector Blur to the CPU.
Omar Emara added 4 commits 2024-04-02 13:25:13 +02:00
Omar Emara added 1 commit 2024-04-02 14:22:18 +02:00
Omar Emara added 3 commits 2024-04-04 13:44:49 +02:00
Omar Emara added 1 commit 2024-04-04 14:20:47 +02:00
Omar Emara changed title from WIP: Compositor: Port GPU Vector Blur to CPU to Compositor: Port GPU Vector Blur to CPU 2024-04-04 14:27:10 +02:00
Omar Emara requested review from Sergey Sharybin 2024-04-04 14:36:44 +02:00
Omar Emara added 1 commit 2024-04-04 14:39:33 +02:00
buildbot/vexp-code-patch-lint Build done. Details
buildbot/vexp-code-patch-linux-x86_64 Build done. Details
buildbot/vexp-code-patch-darwin-x86_64 Build done. Details
buildbot/vexp-code-patch-darwin-arm64 Build done. Details
buildbot/vexp-code-patch-windows-amd64 Build done. Details
buildbot/vexp-code-patch-coordinator Build done. Details
533d2193a2 Add a reference to GPU implementation
Sergey Sharybin approved these changes 2024-04-04 16:36:57 +02:00
Omar Emara commented 2024-04-04 17:34:18 +02:00
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@blender-bot build

@blender-bot build
Omar Emara added 1 commit 2024-04-05 09:47:43 +02:00
Omar Emara merged commit b229d32086 into main 2024-04-05 09:48:12 +02:00
Omar Emara deleted branch cpu-vector-blur 2024-04-05 09:48:15 +02:00
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