Compositor: Add OIDN prefiltering option to Denoise node

It's equivalent to the OpenImageDenoise prefiltering option in Cycles.
See D12043.

Prefilter modes:
- None: No prefiltering, use when guiding passes are noise-free.
- Fast: Denoise image and guiding passes together. Improves quality when
guiding passes are noisy using least amount of extra processing time.
- Accurate: Prefilter noisy guiding passes before denoising image.
Improves quality when guiding passes are noisy using extra
processing time.

Reviewed By: #compositing, jbakker, sergey

Differential Revision: https://developer.blender.org/D12342

1 files changed, 25 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_nodetree.c b/source/blender/makesrna/intern/rna_nodetree.c
index 86e134799aa..d685692c8fa 100644
--- a/source/blender/makesrna/intern/rna_nodetree.c
+++ b/source/blender/makesrna/intern/rna_nodetree.c
@@ -8890,12 +8890,37 @@ static void def_cmp_denoise(StructRNA *srna)
 {
   PropertyRNA *prop;
 
+  static const EnumPropertyItem prefilter_items[] = {
+      {CMP_NODE_DENOISE_PREFILTER_NONE,
+       "NONE",
+       0,
+       "None",
+       "No prefiltering, use when guiding passes are noise-free"},
+      {CMP_NODE_DENOISE_PREFILTER_FAST,
+       "FAST",
+       0,
+       "Fast",
+       "Denoise image and guiding passes together. Improves quality when guiding passes are noisy "
+       "using least amount of extra processing time"},
+      {CMP_NODE_DENOISE_PREFILTER_ACCURATE,
+       "ACCURATE",
+       0,
+       "Accurate",
+       "Prefilter noisy guiding passes before denoising image. Improves quality when guiding "
+       "passes are noisy using extra processing time"},
+      {0, NULL, 0, NULL, NULL}};
+
   RNA_def_struct_sdna_from(srna, "NodeDenoise", "storage");
 
   prop = RNA_def_property(srna, "use_hdr", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, NULL, "hdr", 0);
   RNA_def_property_ui_text(prop, "HDR", "Process HDR images");
   RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");
+
+  prop = RNA_def_property(srna, "prefilter", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, prefilter_items);
+  RNA_def_property_ui_text(prop, "", "Denoising prefilter");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");
 }
 
 static void def_cmp_antialiasing(StructRNA *srna)