Cycles: add new Spectrum and PackedSpectrum types

These replace float3 and packed_float3 in various places in the kernel where a
spectral color representation will be used in the future. That representation
will require more than 3 channels and conversion to from/RGB. The kernel code
was refactored to remove the assumption that Spectrum and RGB colors are the
same thing.

There are no functional changes, Spectrum is still a float3 and the conversion
functions are no-ops.

Differential Revision: https://developer.blender.org/D15535

1 files changed, 2 insertions, 2 deletions

diff --git a/intern/cycles/kernel/integrator/path_state.h b/intern/cycles/kernel/integrator/path_state.h
index b09bc117d78..5ec94b934ca 100644
--- a/intern/cycles/kernel/integrator/path_state.h
+++ b/intern/cycles/kernel/integrator/path_state.h
@@ -54,7 +54,7 @@ ccl_device_inline void path_state_init_integrator(KernelGlobals kg,
   INTEGRATOR_STATE_WRITE(state, path, mis_ray_pdf) = 0.0f;
   INTEGRATOR_STATE_WRITE(state, path, min_ray_pdf) = FLT_MAX;
   INTEGRATOR_STATE_WRITE(state, path, continuation_probability) = 1.0f;
-  INTEGRATOR_STATE_WRITE(state, path, throughput) = make_float3(1.0f, 1.0f, 1.0f);
+  INTEGRATOR_STATE_WRITE(state, path, throughput) = one_spectrum();
 
 #ifdef __MNEE__
   INTEGRATOR_STATE_WRITE(state, path, mnee) = 0;
@@ -74,7 +74,7 @@ ccl_device_inline void path_state_init_integrator(KernelGlobals kg,
 #ifdef __DENOISING_FEATURES__
   if (kernel_data.kernel_features & KERNEL_FEATURE_DENOISING) {
     INTEGRATOR_STATE_WRITE(state, path, flag) |= PATH_RAY_DENOISING_FEATURES;
-    INTEGRATOR_STATE_WRITE(state, path, denoising_feature_throughput) = one_float3();
+    INTEGRATOR_STATE_WRITE(state, path, denoising_feature_throughput) = one_spectrum();
   }
 #endif
 }