EEVEE-Next: Motion Blur new implementation

The new implementation leverage compute shaders to reduce the
number of passes and complexity.

The max blur amount is now detected automatically, replacing the property
in the render panel by a simple checkbox.

The dilation algorithm has also been rewritten from scratch into a 1 pass
algorithm that does the dilation more efficiently and more precisely.

Some differences with the old implementation can be observed in areas with
complex motion.

1 files changed, 3 insertions, 1 deletions

diff --git a/source/blender/draw/engines/eevee_next/eevee_film.hh b/source/blender/draw/engines/eevee_next/eevee_film.hh
index 1165b9a4c12..d47e3dfa24b 100644
--- a/source/blender/draw/engines/eevee_next/eevee_film.hh
+++ b/source/blender/draw/engines/eevee_next/eevee_film.hh
@@ -50,6 +50,8 @@ class Film {
   /** Static reference as SwapChain does not actually move the objects when swapping. */
   GPUTexture *combined_src_tx_ = nullptr;
   GPUTexture *combined_dst_tx_ = nullptr;
+  /** Incomming combined buffer with post fx applied (motion blur + depth of field). */
+  GPUTexture *combined_final_tx_ = nullptr;
   /** Weight buffers. Double buffered to allow updating it during accumulation. */
   SwapChain<Texture, 2> weight_tx_;
   /** Static reference as SwapChain does not actually move the objects when swapping. */
@@ -74,7 +76,7 @@ class Film {
   void end_sync();
 
   /** Accumulate the newly rendered sample contained in #RenderBuffers and blit to display. */
-  void accumulate(const DRWView *view);
+  void accumulate(const DRWView *view, GPUTexture *combined_final_tx);
 
   /** Blit to display. No rendered sample needed. */
   void display();