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, 9 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index ee1da6be3f2..74ed22ecafd 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -1167,6 +1167,7 @@ typedef struct NodeCryptomatte {
 
 typedef struct NodeDenoise {
   char hdr;
+  char prefilter;
 } NodeDenoise;
 
 typedef struct NodeAttributeClamp {
@@ -1840,6 +1841,14 @@ typedef enum CMPNodeSetAlphaMode {
   CMP_NODE_SETALPHA_MODE_REPLACE_ALPHA = 1,
 } CMPNodeSetAlphaMode;
 
+/* Denoise Node. */
+/* `NodeDenoise.prefilter` */
+typedef enum CMPNodeDenoisePrefilter {
+  CMP_NODE_DENOISE_PREFILTER_FAST = 0,
+  CMP_NODE_DENOISE_PREFILTER_NONE = 1,
+  CMP_NODE_DENOISE_PREFILTER_ACCURATE = 2
+} CMPNodeDenoisePrefilter;
+
 #define CMP_NODE_PLANETRACKDEFORM_MBLUR_SAMPLES_MAX 64
 
 /* Point Density shader node */