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, 23 insertions, 16 deletions

diff --git a/intern/cycles/kernel/geom/geom_primitive.h b/intern/cycles/kernel/geom/geom_primitive.h
index aeb044c9ad3..ba31b12e817 100644
--- a/intern/cycles/kernel/geom/geom_primitive.h
+++ b/intern/cycles/kernel/geom/geom_primitive.h
@@ -19,6 +19,10 @@
  * Generic functions to look up mesh, curve and volume primitive attributes for
  * shading and render passes. */
 
+#pragma once
+
+#include "kernel/kernel_projection.h"
+
 CCL_NAMESPACE_BEGIN
 
 /* Surface Attributes
@@ -27,8 +31,11 @@ CCL_NAMESPACE_BEGIN
  * attributes for performance, mainly for GPU performance to avoid bringing in
  * heavy volume interpolation code. */
 
-ccl_device_inline float primitive_surface_attribute_float(
-    KernelGlobals *kg, const ShaderData *sd, const AttributeDescriptor desc, float *dx, float *dy)
+ccl_device_inline float primitive_surface_attribute_float(const KernelGlobals *kg,
+                                                          const ShaderData *sd,
+                                                          const AttributeDescriptor desc,
+                                                          float *dx,
+                                                          float *dy)
 {
   if (sd->type & PRIMITIVE_ALL_TRIANGLE) {
     if (subd_triangle_patch(kg, sd) == ~0)
@@ -50,7 +57,7 @@ ccl_device_inline float primitive_surface_attribute_float(
   }
 }
 
-ccl_device_inline float2 primitive_surface_attribute_float2(KernelGlobals *kg,
+ccl_device_inline float2 primitive_surface_attribute_float2(const KernelGlobals *kg,
                                                             const ShaderData *sd,
                                                             const AttributeDescriptor desc,
                                                             float2 *dx,
@@ -76,7 +83,7 @@ ccl_device_inline float2 primitive_surface_attribute_float2(KernelGlobals *kg,
   }
 }
 
-ccl_device_inline float3 primitive_surface_attribute_float3(KernelGlobals *kg,
+ccl_device_inline float3 primitive_surface_attribute_float3(const KernelGlobals *kg,
                                                             const ShaderData *sd,
                                                             const AttributeDescriptor desc,
                                                             float3 *dx,
@@ -102,11 +109,11 @@ ccl_device_inline float3 primitive_surface_attribute_float3(KernelGlobals *kg,
   }
 }
 
-ccl_device_inline float4 primitive_surface_attribute_float4(KernelGlobals *kg,
-                                                            const ShaderData *sd,
-                                                            const AttributeDescriptor desc,
-                                                            float4 *dx,
-                                                            float4 *dy)
+ccl_device_forceinline float4 primitive_surface_attribute_float4(const KernelGlobals *kg,
+                                                                 const ShaderData *sd,
+                                                                 const AttributeDescriptor desc,
+                                                                 float4 *dx,
+                                                                 float4 *dy)
 {
   if (sd->type & PRIMITIVE_ALL_TRIANGLE) {
     if (subd_triangle_patch(kg, sd) == ~0)
@@ -141,7 +148,7 @@ ccl_device_inline bool primitive_is_volume_attribute(const ShaderData *sd,
   return sd->type == PRIMITIVE_VOLUME;
 }
 
-ccl_device_inline float primitive_volume_attribute_float(KernelGlobals *kg,
+ccl_device_inline float primitive_volume_attribute_float(const KernelGlobals *kg,
                                                          const ShaderData *sd,
                                                          const AttributeDescriptor desc)
 {
@@ -153,7 +160,7 @@ ccl_device_inline float primitive_volume_attribute_float(KernelGlobals *kg,
   }
 }
 
-ccl_device_inline float3 primitive_volume_attribute_float3(KernelGlobals *kg,
+ccl_device_inline float3 primitive_volume_attribute_float3(const KernelGlobals *kg,
                                                            const ShaderData *sd,
                                                            const AttributeDescriptor desc)
 {
@@ -165,7 +172,7 @@ ccl_device_inline float3 primitive_volume_attribute_float3(KernelGlobals *kg,
   }
 }
 
-ccl_device_inline float4 primitive_volume_attribute_float4(KernelGlobals *kg,
+ccl_device_inline float4 primitive_volume_attribute_float4(const KernelGlobals *kg,
                                                            const ShaderData *sd,
                                                            const AttributeDescriptor desc)
 {
@@ -180,7 +187,7 @@ ccl_device_inline float4 primitive_volume_attribute_float4(KernelGlobals *kg,
 
 /* Default UV coordinate */
 
-ccl_device_inline float3 primitive_uv(KernelGlobals *kg, ShaderData *sd)
+ccl_device_inline float3 primitive_uv(const KernelGlobals *kg, const ShaderData *sd)
 {
   const AttributeDescriptor desc = find_attribute(kg, sd, ATTR_STD_UV);
 
@@ -193,7 +200,7 @@ ccl_device_inline float3 primitive_uv(KernelGlobals *kg, ShaderData *sd)
 
 /* Ptex coordinates */
 
-ccl_device bool primitive_ptex(KernelGlobals *kg, ShaderData *sd, float2 *uv, int *face_id)
+ccl_device bool primitive_ptex(const KernelGlobals *kg, ShaderData *sd, float2 *uv, int *face_id)
 {
   /* storing ptex data as attributes is not memory efficient but simple for tests */
   const AttributeDescriptor desc_face_id = find_attribute(kg, sd, ATTR_STD_PTEX_FACE_ID);
@@ -213,7 +220,7 @@ ccl_device bool primitive_ptex(KernelGlobals *kg, ShaderData *sd, float2 *uv, in
 
 /* Surface tangent */
 
-ccl_device float3 primitive_tangent(KernelGlobals *kg, ShaderData *sd)
+ccl_device float3 primitive_tangent(const KernelGlobals *kg, ShaderData *sd)
 {
 #ifdef __HAIR__
   if (sd->type & PRIMITIVE_ALL_CURVE)
@@ -245,7 +252,7 @@ ccl_device float3 primitive_tangent(KernelGlobals *kg, ShaderData *sd)
 
 /* Motion vector for motion pass */
 
-ccl_device_inline float4 primitive_motion_vector(KernelGlobals *kg, ShaderData *sd)
+ccl_device_inline float4 primitive_motion_vector(const KernelGlobals *kg, const ShaderData *sd)
 {
   /* center position */
   float3 center;