EEVEE-Next: Depth Of Field: Port implementation to compute shader

This is a port of the previous implementation but using compute
shaders instead of using the raster pipeline for every steps.

Only the scatter passes is kept as a raster pass for obvious performance
reasons.

Many steps have been rewritten to take advantage of LDS which allows faster
and simpler downsampling and filtering for some passes.

A new stabilize phase has been separated from another setup pass in order
to improve it in the future with better stabilization.

The scatter pass shaders and pipeline also changed. We now use indirect
drawcall to draw quads using triangle strips primitives. This reduces
fragment shader invocation count & overdraw compared to a bounding
triangle. This also reduces the amount of vertex shader invocation
drastically to the bare minimum instead of having always 3 verts per
4 pixels (for each ground).

1 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/draw/engines/eevee_next/eevee_sampling.hh b/source/blender/draw/engines/eevee_next/eevee_sampling.hh
index c604ecef40b..be87ee74886 100644
--- a/source/blender/draw/engines/eevee_next/eevee_sampling.hh
+++ b/source/blender/draw/engines/eevee_next/eevee_sampling.hh
@@ -27,11 +27,11 @@ class Sampling {
   Instance &inst_;
 
   /* Number of samples in the first ring of jittered depth of field. */
-  constexpr static uint64_t dof_web_density_ = 6;
+  static constexpr uint64_t dof_web_density_ = 6;
   /* High number of sample for viewport infinite rendering. */
-  constexpr static uint64_t infinite_sample_count_ = 0xFFFFFFu;
+  static constexpr uint64_t infinite_sample_count_ = 0xFFFFFFu;
   /* During interactive rendering, loop over the first few samples. */
-  constexpr static uint64_t interactive_sample_max_ = 8;
+  static constexpr uint64_t interactive_sample_max_ = 8;
 
   /** 0 based current sample. Might not increase sequentially in viewport. */
   uint64_t sample_ = 0;