1 files changed, 100 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/background.cpp b/intern/cycles/kernel/osl/background.cpp
new file mode 100644
index 00000000000..c35119ae9cf
--- /dev/null
+++ b/intern/cycles/kernel/osl/background.cpp
@@ -0,0 +1,100 @@
+/*
+ * Adapted from Open Shading Language with this license:
+ *
+ * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
+ * All Rights Reserved.
+ *
+ * Modifications Copyright 2011, Blender Foundation.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * * Neither the name of Sony Pictures Imageworks nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <OpenImageIO/fmath.h>
+
+#include <OSL/genclosure.h>
+
+#include "osl_closures.h"
+
+CCL_NAMESPACE_BEGIN
+
+using namespace OSL;
+
+/// Generic background closure
+///
+/// We only have a background closure for the shaders
+/// to return a color in background shaders. No methods,
+/// only the weight is taking into account
+///
+class GenericBackgroundClosure : public BackgroundClosure {
+public:
+    GenericBackgroundClosure() { }
+
+    void setup() {};
+
+    size_t memsize () const { return sizeof(*this); }
+
+    const char *name () const { return "background"; }
+
+    void print_on (std::ostream &out) const {
+        out << name() << " ()";
+    }
+
+};
+
+
+/// Holdout closure
+///
+/// This will be used by the shader to mark the
+/// amount of holdout for the current shading
+/// point. No parameters, only the weight will be
+/// used
+///
+class HoldoutClosure : ClosurePrimitive {
+public:
+    HoldoutClosure () : ClosurePrimitive (Holdout) { }
+
+    void setup() {};
+
+    size_t memsize () const { return sizeof(*this); }
+
+    const char *name () const { return "holdout"; }
+
+    void print_on (std::ostream &out) const {
+        out << name() << " ()";
+    }
+};
+
+ClosureParam closure_background_params[] = {
+    CLOSURE_STRING_KEYPARAM("label"),
+    CLOSURE_FINISH_PARAM(GenericBackgroundClosure) };
+
+CLOSURE_PREPARE(closure_background_prepare, GenericBackgroundClosure)
+
+ClosureParam closure_holdout_params[] = {
+    CLOSURE_FINISH_PARAM(HoldoutClosure) };
+
+CLOSURE_PREPARE(closure_holdout_prepare, HoldoutClosure)
+
+CCL_NAMESPACE_END
+