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/*
* 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.
*/
#ifndef __OSL_CLOSURES_H__
#define __OSL_CLOSURES_H__
#include "util_types.h"
#include "kernel_types.h"
#include <OSL/oslclosure.h>
#include <OSL/oslexec.h>
#include <OSL/genclosure.h>
CCL_NAMESPACE_BEGIN
OSL::ClosureParam *closure_emission_params();
OSL::ClosureParam *closure_background_params();
OSL::ClosureParam *closure_holdout_params();
OSL::ClosureParam *closure_ambient_occlusion_params();
OSL::ClosureParam *closure_bsdf_diffuse_ramp_params();
OSL::ClosureParam *closure_bsdf_phong_ramp_params();
OSL::ClosureParam *closure_bssrdf_cubic_params();
OSL::ClosureParam *closure_bssrdf_gaussian_params();
OSL::ClosureParam *closure_henyey_greenstein_volume_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_ambient_occlusion_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_bssrdf_cubic_prepare(OSL::RendererServices *, int id, void *data);
void closure_bssrdf_gaussian_prepare(OSL::RendererServices *, int id, void *data);
void closure_henyey_greenstein_volume_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, reckless_offsetof(st, fld), NULL, sizeof(OSL::Vec3) }
#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:
enum Category {
BSDF, ///< Reflective and/or transmissive surface
BSSRDF, ///< Sub-surface light transfer
Emissive, ///< Light emission
Background, ///< Background emission
Volume, ///< Volume scattering
Holdout, ///< Holdout from alpha
AmbientOcclusion, ///< Ambient occlusion
};
CClosurePrimitive (Category category_) : category (category_) {}
virtual ~CClosurePrimitive() {}
virtual void setup() {}
Category category;
};
/* BSDF */
class CBSDFClosure : public CClosurePrimitive {
public:
ShaderClosure sc;
CBSDFClosure(int scattering) : CClosurePrimitive(BSDF),
m_scattering_label(scattering), m_shaderdata_flag(0)
{}
int scattering() const { return m_scattering_label; }
int shaderdata_flag() const { return m_shaderdata_flag; }
virtual void blur(float roughness) = 0;
virtual float3 eval_reflect(const float3 &omega_out, const float3 &omega_in, float &pdf) const = 0;
virtual float3 eval_transmit(const float3 &omega_out, const float3 &omega_in, float &pdf) const = 0;
virtual int sample(const float3 &Ng,
const float3 &omega_out, const float3 &domega_out_dx, const float3 &domega_out_dy,
float randu, float randv,
float3 &omega_in, float3 &domega_in_dx, float3 &domega_in_dy,
float &pdf, float3 &eval) const = 0;
protected:
int m_scattering_label;
int m_shaderdata_flag;
};
#define BSDF_CLOSURE_CLASS_BEGIN(Upper, lower, svmlower, TYPE) \
\
class Upper##Closure : public CBSDFClosure { \
public: \
Upper##Closure() : CBSDFClosure(TYPE) \
{ \
} \
\
void setup() \
{ \
sc.prim = NULL; \
m_shaderdata_flag = bsdf_##lower##_setup(&sc); \
} \
\
void blur(float roughness) \
{ \
} \
\
float3 eval_reflect(const float3 &omega_out, const float3 &omega_in, float& pdf) const \
{ \
pdf = 0; \
return make_float3(0, 0, 0); \
} \
\
float3 eval_transmit(const float3 &omega_out, const float3 &omega_in, float& pdf) const \
{ \
pdf = 0; \
return make_float3(0, 0, 0); \
} \
\
int sample(const float3 &Ng, \
const float3 &omega_out, const float3 &domega_out_dx, const float3 &domega_out_dy, \
float randu, float randv, \
float3 &omega_in, float3 &domega_in_dx, float3 &domega_in_dy, \
float &pdf, float3 &eval) const \
{ \
pdf = 0; \
return LABEL_NONE; \
} \
}; \
\
static ClosureParam *bsdf_##lower##_params() \
{ \
static ClosureParam params[] = {
/* parameters */
#define BSDF_CLOSURE_CLASS_END(Upper, lower) \
CLOSURE_STRING_KEYPARAM("label"), \
CLOSURE_FINISH_PARAM(Upper##Closure) \
}; \
return params; \
} \
\
CCLOSURE_PREPARE_STATIC(bsdf_##lower##_prepare, Upper##Closure)
/* Volume */
class CVolumeClosure : public CClosurePrimitive {
public:
ShaderClosure sc;
CVolumeClosure(int scattering) : CClosurePrimitive(Volume),
m_scattering_label(scattering), m_shaderdata_flag(0)
{}
~CVolumeClosure() { }
int scattering() const { return m_scattering_label; }
int shaderdata_flag() const { return m_shaderdata_flag; }
protected:
int m_scattering_label;
int m_shaderdata_flag;
};
#define VOLUME_CLOSURE_CLASS_BEGIN(Upper, lower, TYPE) \
\
class Upper##Closure : public CVolumeClosure { \
public: \
Upper##Closure() : CVolumeClosure(TYPE) {} \
\
void setup() \
{ \
sc.prim = NULL; \
m_shaderdata_flag = volume_##lower##_setup(&sc); \
} \
}; \
\
static ClosureParam *volume_##lower##_params() \
{ \
static ClosureParam params[] = {
/* parameters */
#define VOLUME_CLOSURE_CLASS_END(Upper, lower) \
CLOSURE_STRING_KEYPARAM("label"), \
CLOSURE_FINISH_PARAM(Upper##Closure) \
}; \
return params; \
} \
\
CCLOSURE_PREPARE_STATIC(volume_##lower##_prepare, Upper##Closure)
CCL_NAMESPACE_END
#endif /* __OSL_CLOSURES_H__ */
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