2 * Adapted from Open Shading Language with this license:
4 * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
7 * Modifications Copyright 2011, Blender Foundation.
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33 #include <OpenImageIO/fmath.h>
35 #include <OSL/genclosure.h>
37 #include "osl_closures.h"
43 /// Generic background closure
45 /// We only have a background closure for the shaders
46 /// to return a color in background shaders. No methods,
47 /// only the weight is taking into account
49 class GenericBackgroundClosure : public BackgroundClosure {
51 GenericBackgroundClosure() {}
55 size_t memsize() const { return sizeof(*this); }
57 const char *name() const { return "background"; }
59 void print_on(std::ostream &out) const {
60 out << name() << " ()";
68 /// This will be used by the shader to mark the
69 /// amount of holdout for the current shading
70 /// point. No parameters, only the weight will be
73 class HoldoutClosure : ClosurePrimitive {
75 HoldoutClosure () : ClosurePrimitive(Holdout) {}
79 size_t memsize() const { return sizeof(*this); }
81 const char *name() const { return "holdout"; }
83 void print_on(std::ostream &out) const {
84 out << name() << " ()";
88 ClosureParam closure_background_params[] = {
89 CLOSURE_STRING_KEYPARAM("label"),
90 CLOSURE_FINISH_PARAM(GenericBackgroundClosure)
93 CLOSURE_PREPARE(closure_background_prepare, GenericBackgroundClosure)
95 ClosureParam closure_holdout_params[] = {
96 CLOSURE_FINISH_PARAM(HoldoutClosure)
99 CLOSURE_PREPARE(closure_holdout_prepare, HoldoutClosure)