Cycles / Toon BSDF:
[blender-staging.git] / intern / cycles / kernel / osl / osl_closures.h
1 /*
2  * Adapted from Open Shading Language with this license:
3  *
4  * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
5  * All Rights Reserved.
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7  * Modifications Copyright 2011, Blender Foundation.
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10  * modification, are permitted provided that the following conditions are
11  * met:
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16  *   documentation and/or other materials provided with the distribution.
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19  *   this software without specific prior written permission.
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31  */
32
33 #ifndef __OSL_CLOSURES_H__
34 #define __OSL_CLOSURES_H__
35
36 #include <OSL/oslclosure.h>
37 #include <OSL/oslexec.h>
38 #include <OSL/genclosure.h>
39
40 #include "kernel_types.h"
41
42 #include "util_types.h"
43
44 CCL_NAMESPACE_BEGIN
45
46 OSL::ClosureParam *closure_emission_params();
47 OSL::ClosureParam *closure_background_params();
48 OSL::ClosureParam *closure_holdout_params();
49 OSL::ClosureParam *closure_ambient_occlusion_params();
50 OSL::ClosureParam *closure_bsdf_diffuse_ramp_params();
51 OSL::ClosureParam *closure_bsdf_phong_ramp_params();
52 OSL::ClosureParam *closure_westin_backscatter_params();
53 OSL::ClosureParam *closure_westin_sheen_params();
54 OSL::ClosureParam *closure_bssrdf_params();
55
56 void closure_emission_prepare(OSL::RendererServices *, int id, void *data);
57 void closure_background_prepare(OSL::RendererServices *, int id, void *data);
58 void closure_holdout_prepare(OSL::RendererServices *, int id, void *data);
59 void closure_ambient_occlusion_prepare(OSL::RendererServices *, int id, void *data);
60 void closure_bsdf_diffuse_ramp_prepare(OSL::RendererServices *, int id, void *data);
61 void closure_bsdf_phong_ramp_prepare(OSL::RendererServices *, int id, void *data);
62 void closure_westin_backscatter_prepare(OSL::RendererServices *, int id, void *data);
63 void closure_westin_sheen_prepare(OSL::RendererServices *, int id, void *data);
64 void closure_bssrdf_prepare(OSL::RendererServices *, int id, void *data);
65
66 enum {
67         AmbientOcclusion = 100
68 };
69
70 #define CLOSURE_PREPARE(name, classname)          \
71 void name(RendererServices *, int id, void *data) \
72 {                                                 \
73         memset(data, 0, sizeof(classname));           \
74         new (data) classname();                       \
75 }
76
77 #define CLOSURE_PREPARE_STATIC(name, classname) static CLOSURE_PREPARE(name, classname)
78
79 #define CLOSURE_FLOAT3_PARAM(st, fld) \
80     { TypeDesc::TypeVector, reckless_offsetof(st, fld), NULL, sizeof(OSL::Vec3) }
81
82 #define TO_VEC3(v) OSL::Vec3(v.x, v.y, v.z)
83 #define TO_COLOR3(v) OSL::Color3(v.x, v.y, v.z)
84 #define TO_FLOAT3(v) make_float3(v[0], v[1], v[2])
85
86 /* BSDF */
87
88 class CBSDFClosure : public OSL::ClosurePrimitive {
89 public:
90         ShaderClosure sc;
91
92         CBSDFClosure(int scattering) : OSL::ClosurePrimitive(BSDF),
93           m_scattering_label(scattering), m_shaderdata_flag(0) { }
94         ~CBSDFClosure() { }
95
96         int scattering() const { return m_scattering_label; }
97         int shaderdata_flag() const { return m_shaderdata_flag; }
98
99         virtual void blur(float roughness) = 0;
100         virtual float3 eval_reflect(const float3 &omega_out, const float3 &omega_in, float &pdf) const = 0;
101         virtual float3 eval_transmit(const float3 &omega_out, const float3 &omega_in, float &pdf) const = 0;
102
103         virtual int sample(const float3 &Ng,
104                            const float3 &omega_out, const float3 &domega_out_dx, const float3 &domega_out_dy,
105                            float randu, float randv,
106                            float3 &omega_in, float3 &domega_in_dx, float3 &domega_in_dy,
107                            float &pdf, float3 &eval) const = 0;
108
109 protected:
110         int m_scattering_label;
111         int m_shaderdata_flag;
112 };
113
114 #define BSDF_CLOSURE_CLASS_BEGIN(Upper, lower, svmlower, TYPE) \
115 \
116 class Upper##Closure : public CBSDFClosure { \
117 public: \
118         Upper##Closure() : CBSDFClosure(TYPE) {} \
119         size_t memsize() const { return sizeof(*this); } \
120         const char *name() const { return #lower; } \
121 \
122         void setup() \
123         { \
124                 sc.prim = NULL; \
125                 m_shaderdata_flag = bsdf_##lower##_setup(&sc); \
126         } \
127 \
128         bool mergeable(const ClosurePrimitive *other) const \
129         { \
130                 return false; \
131         } \
132         \
133         void blur(float roughness) \
134         { \
135                 bsdf_##svmlower##_blur(&sc, roughness); \
136         } \
137 \
138         void print_on(std::ostream &out) const \
139         { \
140                 out << name() << " ((" << sc.N[0] << ", " << sc.N[1] << ", " << sc.N[2] << "))"; \
141         } \
142 \
143         float3 eval_reflect(const float3 &omega_out, const float3 &omega_in, float& pdf) const \
144         { \
145                 return bsdf_##svmlower##_eval_reflect(&sc, omega_out, omega_in, &pdf); \
146         } \
147 \
148         float3 eval_transmit(const float3 &omega_out, const float3 &omega_in, float& pdf) const \
149         { \
150                 return bsdf_##svmlower##_eval_transmit(&sc, omega_out, omega_in, &pdf); \
151         } \
152 \
153         int sample(const float3 &Ng, \
154                    const float3 &omega_out, const float3 &domega_out_dx, const float3 &domega_out_dy, \
155                    float randu, float randv, \
156                    float3 &omega_in, float3 &domega_in_dx, float3 &domega_in_dy, \
157                    float &pdf, float3 &eval) const \
158         { \
159                 return bsdf_##svmlower##_sample(&sc, Ng, omega_out, domega_out_dx, domega_out_dy, \
160                         randu, randv, &eval, &omega_in, &domega_in_dx, &domega_in_dy, &pdf); \
161         } \
162 }; \
163 \
164 static ClosureParam *bsdf_##lower##_params() \
165 { \
166         static ClosureParam params[] = {
167
168 /* parameters */
169
170 #define BSDF_CLOSURE_CLASS_END(Upper, lower) \
171                 CLOSURE_STRING_KEYPARAM("label"), \
172             CLOSURE_FINISH_PARAM(Upper##Closure) \
173         }; \
174         return params; \
175 } \
176 \
177 CLOSURE_PREPARE_STATIC(bsdf_##lower##_prepare, Upper##Closure)
178
179 CCL_NAMESPACE_END
180
181 #endif /* __OSL_CLOSURES_H__ */
182