Cycles: add Intel OpenImageDenoise support for viewport denoising

Compared to Optix denoise, this is usually slower since there is no GPU
acceleration. Some optimizations may still be possible, in avoid copies
to the GPU and/or denoising less often.

The main thing is that this adds viewport denoising support for computers
without an NVIDIA GPU (as long as the CPU supports SSE 4.1, which is nearly
all of them).

Ref T76259

1 files changed, 10 insertions, 0 deletions

diff --git a/intern/cycles/blender/blender_python.cpp b/intern/cycles/blender/blender_python.cpp
index 5595d657640..3e595c3ee52 100644
--- a/intern/cycles/blender/blender_python.cpp
+++ b/intern/cycles/blender/blender_python.cpp
@@ -31,6 +31,7 @@
 #include "util/util_logging.h"
 #include "util/util_md5.h"
 #include "util/util_opengl.h"
+#include "util/util_openimagedenoise.h"
 #include "util/util_path.h"
 #include "util/util_string.h"
 #include "util/util_task.h"
@@ -1076,5 +1077,14 @@ void *CCL_python_module_init()
   Py_INCREF(Py_False);
 #endif /* WITH_EMBREE */
 
+  if (ccl::openimagedenoise_supported()) {
+    PyModule_AddObject(mod, "with_openimagedenoise", Py_True);
+    Py_INCREF(Py_True);
+  }
+  else {
+    PyModule_AddObject(mod, "with_openimagedenoise", Py_False);
+    Py_INCREF(Py_False);
+  }
+
   return (void *)mod;
 }