Cycles: OpenCL Separate Compilation Debug Flag

OpenCL Parallel compilation only works inside Blender. When using cycles in a different setup (standaline or other software) it failed compiling kernels as they don't have the appropriate Python API and command line arguments.

This change introduces a `running_inside_blender` debug flag, that triggers out of process compilation of the kernels. Compilation still happens in subthread that enabled the preview kernels and compilation of the kernels during BVH building

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D5439

2 files changed, 3 insertions, 1 deletions

diff --git a/intern/cycles/util/util_debug.cpp b/intern/cycles/util/util_debug.cpp
index aabfea7fc49..e52fda26845 100644
--- a/intern/cycles/util/util_debug.cpp
+++ b/intern/cycles/util/util_debug.cpp
@@ -120,7 +120,7 @@ void DebugFlags::OpenCL::reset()
   debug = (getenv("CYCLES_OPENCL_DEBUG") != NULL);
 }
 
-DebugFlags::DebugFlags() : viewport_static_bvh(false)
+DebugFlags::DebugFlags() : viewport_static_bvh(false), running_inside_blender(false)
 {
   /* Nothing for now. */
 }
diff --git a/intern/cycles/util/util_debug.h b/intern/cycles/util/util_debug.h
index 83d9e96ffa5..5b0004ea768 100644
--- a/intern/cycles/util/util_debug.h
+++ b/intern/cycles/util/util_debug.h
@@ -33,6 +33,8 @@ class DebugFlags {
   /* Use static BVH in viewport, to match final render exactly. */
   bool viewport_static_bvh;
 
+  bool running_inside_blender;
+
   /* Descriptor of CPU feature-set to be used. */
   struct CPU {
     CPU();