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/* SPDX-License-Identifier: BSD-3-Clause
*
* Adapted from Open Shading Language
* Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
* All Rights Reserved.
*
* Modifications Copyright 2011-2022 Blender Foundation. */
#ifndef __OSL_CLOSURES_H__
#define __OSL_CLOSURES_H__
#include "kernel/types.h"
#include "util/types.h"
#include <OSL/genclosure.h>
#include <OSL/oslclosure.h>
#include <OSL/oslexec.h>
CCL_NAMESPACE_BEGIN
OSL::ClosureParam *closure_emission_params();
OSL::ClosureParam *closure_background_params();
OSL::ClosureParam *closure_holdout_params();
OSL::ClosureParam *closure_bsdf_diffuse_ramp_params();
OSL::ClosureParam *closure_bsdf_phong_ramp_params();
OSL::ClosureParam *closure_bsdf_transparent_params();
OSL::ClosureParam *closure_bssrdf_params();
OSL::ClosureParam *closure_absorption_params();
OSL::ClosureParam *closure_henyey_greenstein_params();
OSL::ClosureParam *closure_bsdf_microfacet_params();
OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_params();
OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_glass_params();
OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_aniso_params();
OSL::ClosureParam *closure_bsdf_microfacet_ggx_fresnel_params();
OSL::ClosureParam *closure_bsdf_microfacet_ggx_aniso_fresnel_params();
OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_fresnel_params();
OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_glass_fresnel_params();
OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_aniso_fresnel_params();
OSL::ClosureParam *closure_bsdf_principled_clearcoat_params();
void closure_emission_prepare(OSL::RendererServices *, int id, void *data);
void closure_background_prepare(OSL::RendererServices *, int id, void *data);
void closure_holdout_prepare(OSL::RendererServices *, int id, void *data);
void closure_bsdf_diffuse_ramp_prepare(OSL::RendererServices *, int id, void *data);
void closure_bsdf_phong_ramp_prepare(OSL::RendererServices *, int id, void *data);
void closure_bsdf_transparent_prepare(OSL::RendererServices *, int id, void *data);
void closure_bssrdf_prepare(OSL::RendererServices *, int id, void *data);
void closure_absorption_prepare(OSL::RendererServices *, int id, void *data);
void closure_henyey_greenstein_prepare(OSL::RendererServices *, int id, void *data);
void closure_bsdf_microfacet_prepare(OSL::RendererServices *, int id, void *data);
void closure_bsdf_microfacet_multi_ggx_prepare(OSL::RendererServices *, int id, void *data);
void closure_bsdf_microfacet_multi_ggx_glass_prepare(OSL::RendererServices *, int id, void *data);
void closure_bsdf_microfacet_multi_ggx_aniso_prepare(OSL::RendererServices *, int id, void *data);
void closure_bsdf_microfacet_ggx_fresnel_prepare(OSL::RendererServices *, int id, void *data);
void closure_bsdf_microfacet_ggx_aniso_fresnel_prepare(OSL::RendererServices *,
int id,
void *data);
void closure_bsdf_microfacet_multi_ggx_fresnel_prepare(OSL::RendererServices *,
int id,
void *data);
void closure_bsdf_microfacet_multi_ggx_glass_fresnel_prepare(OSL::RendererServices *,
int id,
void *data);
void closure_bsdf_microfacet_multi_ggx_aniso_fresnel_prepare(OSL::RendererServices *,
int id,
void *data);
void closure_bsdf_principled_clearcoat_prepare(OSL::RendererServices *, int id, void *data);
void closure_bsdf_principled_hair_prepare(OSL::RendererServices *, int id, void *data);
#define CCLOSURE_PREPARE(name, classname) \
void name(RendererServices *, int id, void *data) \
{ \
memset(data, 0, sizeof(classname)); \
new (data) classname(); \
}
#define CCLOSURE_PREPARE_STATIC(name, classname) static CCLOSURE_PREPARE(name, classname)
#define CLOSURE_FLOAT3_PARAM(st, fld) \
{ \
TypeDesc::TypeVector, (int)reckless_offsetof(st, fld), NULL, sizeof(OSL::Vec3) \
}
#define BSDF_CLOSURE_FLOAT_PARAM(st, fld) CLOSURE_FLOAT_PARAM(st, fld),
#define BSDF_CLOSURE_FLOAT3_PARAM(st, fld) CLOSURE_FLOAT3_PARAM(st, fld),
#define TO_VEC3(v) OSL::Vec3(v.x, v.y, v.z)
#define TO_COLOR3(v) OSL::Color3(v.x, v.y, v.z)
#define TO_FLOAT3(v) make_float3(v[0], v[1], v[2])
/* Closure */
class CClosurePrimitive {
public:
virtual void setup(ShaderData *sd, uint32_t path_flag, float3 weight) = 0;
OSL::ustring label;
};
/* BSDF */
class CBSDFClosure : public CClosurePrimitive {
public:
bool skip(const ShaderData *sd, uint32_t path_flag, int scattering);
};
#define BSDF_CLOSURE_CLASS_BEGIN(Upper, lower, structname, TYPE) \
\
class Upper##Closure : public CBSDFClosure { \
public: \
structname params; \
float3 unused; \
\
void setup(ShaderData *sd, uint32_t path_flag, float3 weight) \
{ \
if (!skip(sd, path_flag, TYPE)) { \
params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N); \
structname *bsdf = (structname *)bsdf_alloc_osl( \
sd, sizeof(structname), rgb_to_spectrum(weight), ¶ms); \
sd->flag |= (bsdf) ? bsdf_##lower##_setup(bsdf) : 0; \
} \
} \
}; \
\
static ClosureParam *bsdf_##lower##_params() \
{ \
static ClosureParam params[] = {
/* parameters */
#define BSDF_CLOSURE_CLASS_END(Upper, lower) \
CLOSURE_STRING_KEYPARAM(Upper##Closure, label, "label"), CLOSURE_FINISH_PARAM(Upper##Closure) \
} \
; \
return params; \
} \
\
CCLOSURE_PREPARE_STATIC(bsdf_##lower##_prepare, Upper##Closure)
CCL_NAMESPACE_END
#endif /* __OSL_CLOSURES_H__ */
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