EEVEE-Next: Film: Fix incorrect anti-aliasing

There was a confusion about what space the offset was in.

2 files changed, 4 insertions, 2 deletions

diff --git a/source/blender/draw/engines/eevee_next/eevee_film.cc b/source/blender/draw/engines/eevee_next/eevee_film.cc
index 42c61ac90a8..a111b1db4a3 100644
--- a/source/blender/draw/engines/eevee_next/eevee_film.cc
+++ b/source/blender/draw/engines/eevee_next/eevee_film.cc
@@ -441,8 +441,8 @@ float2 Film::pixel_jitter_get() const
     jitter = Sampling::sample_disk(jitter) * data_.filter_size;
   }
   else {
-    /* Jitter the size of a whole pixel. */
-    jitter = jitter * 2.0f - 1.0f;
+    /* Jitter the size of a whole pixel. [-0.5..0.5] */
+    jitter -= 0.5f;
   }
   /* TODO(fclem): Mixed-resolution rendering: We need to offset to each of the target pixel covered
    * by a render pixel, ideally, by choosing one randomly using another sampling dimension, or by
diff --git a/source/blender/draw/engines/eevee_next/eevee_view.cc b/source/blender/draw/engines/eevee_next/eevee_view.cc
index 1a222dc4ebd..8052ea76def 100644
--- a/source/blender/draw/engines/eevee_next/eevee_view.cc
+++ b/source/blender/draw/engines/eevee_next/eevee_view.cc
@@ -181,6 +181,8 @@ void ShadingView::update_view()
 
   /* Anti-Aliasing / Super-Sampling jitter. */
   float2 jitter = inst_.film.pixel_jitter_get() / float2(extent_);
+  /* Transform to NDC space. */
+  jitter *= 2.0f;
 
   window_translate_m4(winmat.ptr(), winmat.ptr(), UNPACK2(jitter));
   DRW_view_update_sub(sub_view_, viewmat.ptr(), winmat.ptr());