EEVEE-Next: Add Temporal-AntiAliasing

The improvements over the old implementation are:
- Improved history reprojection filter (catmull-rom)
- Use proper velocity for history reprojection.
- History clipping is now done in YCoCg color space using better algorithm.
- Velocity is dilated to keep correct edge anti-aliasing on moving objects.

As a result, the 3x3 blocks that made the image smoother in the previous
implementation are no longer visible is replaced by correct antialiasing.

This removes the velocity resolve pass in order to reduce the bandwidth
usage. The velocities are just resolved as they are loadded in the film
pass.

1 files changed, 6 insertions, 1 deletions

diff --git a/source/blender/draw/engines/eevee_next/eevee_renderbuffers.cc b/source/blender/draw/engines/eevee_next/eevee_renderbuffers.cc
index 6e30ba989df..c60054496c1 100644
--- a/source/blender/draw/engines/eevee_next/eevee_renderbuffers.cc
+++ b/source/blender/draw/engines/eevee_next/eevee_renderbuffers.cc
@@ -56,8 +56,13 @@ void RenderBuffers::acquire(int2 extent, void *owner)
   depth_tx.acquire(extent, GPU_DEPTH24_STENCIL8, owner);
   combined_tx.acquire(extent, color_format, owner);
 
+  bool do_vector_render_pass = inst_.film.enabled_passes_get() & EEVEE_RENDER_PASS_VECTOR;
+  /* Only RG16F when only doing only reprojection or motion blur. */
+  eGPUTextureFormat vector_format = do_vector_render_pass ? GPU_RGBA16F : GPU_RG16F;
+  /* TODO(fclem): Make vector pass allocation optional if no TAA or motion blur is needed. */
+  vector_tx.acquire(extent, vector_format, owner);
+
   normal_tx.acquire(pass_extent(EEVEE_RENDER_PASS_NORMAL), color_format, owner);
-  vector_tx.acquire(pass_extent(EEVEE_RENDER_PASS_VECTOR), color_format, owner);
   diffuse_light_tx.acquire(pass_extent(EEVEE_RENDER_PASS_DIFFUSE_LIGHT), color_format, owner);
   diffuse_color_tx.acquire(pass_extent(EEVEE_RENDER_PASS_DIFFUSE_COLOR), color_format, owner);
   specular_light_tx.acquire(pass_extent(EEVEE_RENDER_PASS_SPECULAR_LIGHT), color_format, owner);