Cycles: merge of cycles-x branch, a major update to the renderer

This includes much improved GPU rendering performance, viewport interactivity,
new shadow catcher, revamped sampling settings, subsurface scattering anisotropy,
new GPU volume sampling, improved PMJ sampling pattern, and more.

Some features have also been removed or changed, breaking backwards compatibility.
Including the removal of the OpenCL backend, for which alternatives are under
development.

Release notes and code docs:
https://wiki.blender.org/wiki/Reference/Release_Notes/3.0/Cycles
https://wiki.blender.org/wiki/Source/Render/Cycles

Credits:
* Sergey Sharybin
* Brecht Van Lommel
* Patrick Mours (OptiX backend)
* Christophe Hery (subsurface scattering anisotropy)
* William Leeson (PMJ sampling pattern)
* Alaska (various fixes and tweaks)
* Thomas Dinges (various fixes)

For the full commit history, see the cycles-x branch. This squashes together
all the changes since intermediate changes would often fail building or tests.

Ref T87839, T87837, T87836
Fixes T90734, T89353, T80267, T80267, T77185, T69800

1 files changed, 7 insertions, 38 deletions

diff --git a/source/blender/nodes/composite/nodes/node_composite_image.c b/source/blender/nodes/composite/nodes/node_composite_image.c
index 243300b0a44..a56dfea9dbf 100644
--- a/source/blender/nodes/composite/nodes/node_composite_image.c
+++ b/source/blender/nodes/composite/nodes/node_composite_image.c
@@ -45,7 +45,7 @@ static bNodeSocketTemplate cmp_node_rlayers_out[] = {
     {SOCK_VECTOR, N_(RE_PASSNAME_NORMAL), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
     {SOCK_VECTOR, N_(RE_PASSNAME_UV), 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
     {SOCK_VECTOR, N_(RE_PASSNAME_VECTOR), 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
-    {SOCK_RGBA, N_(RE_PASSNAME_DEPRECATED), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+    {SOCK_VECTOR, N_(RE_PASSNAME_POSITION), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
     {SOCK_RGBA, N_(RE_PASSNAME_DEPRECATED), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
     {SOCK_RGBA, N_(RE_PASSNAME_DEPRECATED), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
     {SOCK_RGBA, N_(RE_PASSNAME_SHADOW), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
@@ -72,7 +72,7 @@ static bNodeSocketTemplate cmp_node_rlayers_out[] = {
     {SOCK_RGBA, N_(RE_PASSNAME_SUBSURFACE_COLOR), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
     {-1, ""},
 };
-#define MAX_LEGACY_SOCKET_INDEX 30
+#define NUM_LEGACY_SOCKETS (ARRAY_SIZE(cmp_node_rlayers_out) - 1)
 
 static void cmp_node_image_add_pass_output(bNodeTree *ntree,
                                            bNode *node,
@@ -382,7 +382,7 @@ static void cmp_node_image_verify_outputs(bNodeTree *ntree, bNode *node, bool rl
           break;
         }
       }
-      if (!link && (!rlayer || sock_index > MAX_LEGACY_SOCKET_INDEX)) {
+      if (!link && (!rlayer || sock_index >= NUM_LEGACY_SOCKETS)) {
         MEM_freeN(sock->storage);
         nodeRemoveSocket(ntree, node, sock);
       }
@@ -468,43 +468,12 @@ void node_cmp_rlayers_outputs(bNodeTree *ntree, bNode *node)
 
 const char *node_cmp_rlayers_sock_to_pass(int sock_index)
 {
-  const char *sock_to_passname[] = {
-      RE_PASSNAME_COMBINED,
-      RE_PASSNAME_COMBINED,
-      RE_PASSNAME_Z,
-      RE_PASSNAME_NORMAL,
-      RE_PASSNAME_UV,
-      RE_PASSNAME_VECTOR,
-      RE_PASSNAME_DEPRECATED,
-      RE_PASSNAME_DEPRECATED,
-      RE_PASSNAME_DEPRECATED,
-      RE_PASSNAME_SHADOW,
-      RE_PASSNAME_AO,
-      RE_PASSNAME_DEPRECATED,
-      RE_PASSNAME_DEPRECATED,
-      RE_PASSNAME_DEPRECATED,
-      RE_PASSNAME_INDEXOB,
-      RE_PASSNAME_INDEXMA,
-      RE_PASSNAME_MIST,
-      RE_PASSNAME_EMIT,
-      RE_PASSNAME_ENVIRONMENT,
-      RE_PASSNAME_DIFFUSE_DIRECT,
-      RE_PASSNAME_DIFFUSE_INDIRECT,
-      RE_PASSNAME_DIFFUSE_COLOR,
-      RE_PASSNAME_GLOSSY_DIRECT,
-      RE_PASSNAME_GLOSSY_INDIRECT,
-      RE_PASSNAME_GLOSSY_COLOR,
-      RE_PASSNAME_TRANSM_DIRECT,
-      RE_PASSNAME_TRANSM_INDIRECT,
-      RE_PASSNAME_TRANSM_COLOR,
-      RE_PASSNAME_SUBSURFACE_DIRECT,
-      RE_PASSNAME_SUBSURFACE_INDIRECT,
-      RE_PASSNAME_SUBSURFACE_COLOR,
-  };
-  if (sock_index > MAX_LEGACY_SOCKET_INDEX) {
+  if (sock_index >= NUM_LEGACY_SOCKETS) {
     return NULL;
   }
-  return sock_to_passname[sock_index];
+  const char *name = cmp_node_rlayers_out[sock_index].name;
+  /* Exception for alpha, which is derived from Combined. */
+  return (STREQ(name, "Alpha")) ? RE_PASSNAME_COMBINED : name;
 }
 
 static void node_composit_init_rlayers(const bContext *C, PointerRNA *ptr)