1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __SVM_H__
#define __SVM_H__
/* Shader Virtual Machine
*
* A shader is a list of nodes to be executed. These are simply read one after
* the other and executed, using an node counter. Each node and it's associated
* data is encoded as one or more uint4's in a 1D texture. If the data is larger
* than an uint4, the node can increase the node counter to compensate for this.
* Floats are encoded as int and then converted to float again.
*
* Nodes write their output into a stack. All stack data in the stack is
* floats, since it's all factors, colors and vectors. The stack will be stored
* in local memory on the GPU, as it would take too many register and indexes in
* ways not known at compile time. This seems the only solution even though it
* may be slow, with two positive factors. If the same shader is being executed,
* memory access will be coalesced, and on fermi cards, memory will actually be
* cached.
*
* The result of shader execution will be a single closure. This means the
* closure type, associated label, data and weight. Sampling from multiple
* closures is supported through the mix closure node, the logic for that is
* mostly taken care of in the SVM compiler.
*/
#include "svm_types.h"
CCL_NAMESPACE_BEGIN
/* Stack */
__device float3 stack_load_float3(float *stack, uint a)
{
kernel_assert(a+2 < SVM_STACK_SIZE);
return make_float3(stack[a+0], stack[a+1], stack[a+2]);
}
__device void stack_store_float3(float *stack, uint a, float3 f)
{
kernel_assert(a+2 < SVM_STACK_SIZE);
stack[a+0] = f.x;
stack[a+1] = f.y;
stack[a+2] = f.z;
}
__device float stack_load_float(float *stack, uint a)
{
kernel_assert(a < SVM_STACK_SIZE);
return stack[a];
}
__device float stack_load_float_default(float *stack, uint a, uint value)
{
return (a == (uint)SVM_STACK_INVALID)? __int_as_float(value): stack_load_float(stack, a);
}
__device void stack_store_float(float *stack, uint a, float f)
{
kernel_assert(a < SVM_STACK_SIZE);
stack[a] = f;
}
__device bool stack_valid(uint a)
{
return a != (uint)SVM_STACK_INVALID;
}
/* Reading Nodes */
__device uint4 read_node(KernelGlobals *kg, int *offset)
{
uint4 node = kernel_tex_fetch(__svm_nodes, *offset);
(*offset)++;
return node;
}
__device float4 read_node_float(KernelGlobals *kg, int *offset)
{
uint4 node = kernel_tex_fetch(__svm_nodes, *offset);
float4 f = make_float4(__int_as_float(node.x), __int_as_float(node.y), __int_as_float(node.z), __int_as_float(node.w));
(*offset)++;
return f;
}
__device void decode_node_uchar4(uint i, uint *x, uint *y, uint *z, uint *w)
{
if(x) *x = (i & 0xFF);
if(y) *y = ((i >> 8) & 0xFF);
if(z) *z = ((i >> 16) & 0xFF);
if(w) *w = ((i >> 24) & 0xFF);
}
CCL_NAMESPACE_END
/* Nodes */
#include "svm_noise.h"
#include "svm_texture.h"
#include "svm_attribute.h"
#include "svm_blend.h"
#include "svm_closure.h"
#include "svm_clouds.h"
#include "svm_convert.h"
#include "svm_displace.h"
#include "svm_distorted_noise.h"
#include "svm_fresnel.h"
#include "svm_geometry.h"
#include "svm_image.h"
#include "svm_light_path.h"
#include "svm_magic.h"
#include "svm_mapping.h"
#include "svm_marble.h"
#include "svm_math.h"
#include "svm_mix.h"
#include "svm_musgrave.h"
#include "svm_noisetex.h"
#include "svm_sky.h"
#include "svm_stucci.h"
#include "svm_tex_coord.h"
#include "svm_value.h"
#include "svm_voronoi.h"
#include "svm_wood.h"
CCL_NAMESPACE_BEGIN
/* Main Interpreter Loop */
__device void svm_eval_nodes(KernelGlobals *kg, ShaderData *sd, ShaderType type, float randb, int path_flag)
{
float stack[SVM_STACK_SIZE];
float closure_weight = 1.0f;
int offset = sd->shader;
sd->svm_closure = NBUILTIN_CLOSURES;
sd->svm_closure_weight = make_float3(0.0f, 0.0f, 0.0f);
while(1) {
uint4 node = read_node(kg, &offset);
if(node.x == NODE_SHADER_JUMP) {
if(type == SHADER_TYPE_SURFACE) offset = node.y;
else if(type == SHADER_TYPE_VOLUME) offset = node.z;
else if(type == SHADER_TYPE_DISPLACEMENT) offset = node.w;
else return;
}
else if(node.x == NODE_CLOSURE_BSDF)
svm_node_closure_bsdf(sd, node.y, node.z, node.w, randb);
else if(node.x == NODE_CLOSURE_EMISSION)
svm_node_closure_emission(sd);
else if(node.x == NODE_CLOSURE_BACKGROUND)
svm_node_closure_background(sd);
else if(node.x == NODE_CLOSURE_SET_WEIGHT)
svm_node_closure_set_weight(sd, node.y, node.z, node.w);
else if(node.x == NODE_CLOSURE_WEIGHT)
svm_node_closure_weight(sd, stack, node.y);
else if(node.x == NODE_EMISSION_WEIGHT)
svm_node_emission_weight(kg, sd, stack, node);
else if(node.x == NODE_MIX_CLOSURE)
svm_node_mix_closure(sd, stack, node.y, node.z, &offset, &randb);
else if(node.x == NODE_ADD_CLOSURE)
svm_node_add_closure(sd, stack, node.y, node.z, &offset, &randb, &closure_weight);
else if(node.x == NODE_JUMP)
offset = node.y;
#ifdef __TEXTURES__
else if(node.x == NODE_TEX_NOISE_F)
svm_node_tex_noise_f(sd, stack, node.y, node.z);
else if(node.x == NODE_TEX_NOISE_V)
svm_node_tex_noise_v(sd, stack, node.y, node.z);
else if(node.x == NODE_TEX_IMAGE)
svm_node_tex_image(kg, sd, stack, node.y, node.z, node.w);
else if(node.x == NODE_TEX_ENVIRONMENT)
svm_node_tex_environment(kg, sd, stack, node.y, node.z, node.w);
else if(node.x == NODE_TEX_SKY)
svm_node_tex_sky(kg, sd, stack, node.y, node.z);
else if(node.x == NODE_TEX_BLEND)
svm_node_tex_blend(sd, stack, node);
else if(node.x == NODE_TEX_CLOUDS)
svm_node_tex_clouds(sd, stack, node);
else if(node.x == NODE_TEX_VORONOI)
svm_node_tex_voronoi(kg, sd, stack, node, &offset);
else if(node.x == NODE_TEX_MUSGRAVE)
svm_node_tex_musgrave(kg, sd, stack, node, &offset);
else if(node.x == NODE_TEX_MARBLE)
svm_node_tex_marble(kg, sd, stack, node, &offset);
else if(node.x == NODE_TEX_MAGIC)
svm_node_tex_magic(sd, stack, node);
else if(node.x == NODE_TEX_STUCCI)
svm_node_tex_stucci(kg, sd, stack, node, &offset);
else if(node.x == NODE_TEX_DISTORTED_NOISE)
svm_node_tex_distorted_noise(kg, sd, stack, node, &offset);
else if(node.x == NODE_TEX_WOOD)
svm_node_tex_wood(kg, sd, stack, node, &offset);
#endif
else if(node.x == NODE_GEOMETRY)
svm_node_geometry(sd, stack, node.y, node.z);
else if(node.x == NODE_GEOMETRY_BUMP_DX)
svm_node_geometry_bump_dx(sd, stack, node.y, node.z);
else if(node.x == NODE_GEOMETRY_BUMP_DY)
svm_node_geometry_bump_dy(sd, stack, node.y, node.z);
else if(node.x == NODE_LIGHT_PATH)
svm_node_light_path(sd, stack, node.y, node.z, path_flag);
else if(node.x == NODE_CONVERT)
svm_node_convert(sd, stack, node.y, node.z, node.w);
else if(node.x == NODE_VALUE_F)
svm_node_value_f(kg, sd, stack, node.y, node.z);
else if(node.x == NODE_VALUE_V)
svm_node_value_v(kg, sd, stack, node.y, &offset);
else if(node.x == NODE_MIX)
svm_node_mix(kg, sd, stack, node.y, node.z, node.w, &offset);
else if(node.x == NODE_ATTR)
svm_node_attr(kg, sd, stack, node);
else if(node.x == NODE_ATTR_BUMP_DX)
svm_node_attr_bump_dx(kg, sd, stack, node);
else if(node.x == NODE_ATTR_BUMP_DY)
svm_node_attr_bump_dy(kg, sd, stack, node);
else if(node.x == NODE_FRESNEL)
svm_node_fresnel(sd, stack, node.y, node.z, node.w);
else if(node.x == NODE_SET_DISPLACEMENT)
svm_node_set_displacement(sd, stack, node.y);
else if(node.x == NODE_SET_BUMP)
svm_node_set_bump(sd, stack, node.y, node.z, node.w);
else if(node.x == NODE_MATH)
svm_node_math(kg, sd, stack, node.y, node.z, node.w, &offset);
else if(node.x == NODE_VECTOR_MATH)
svm_node_vector_math(kg, sd, stack, node.y, node.z, node.w, &offset);
else if(node.x == NODE_MAPPING)
svm_node_mapping(kg, sd, stack, node.y, node.z, &offset);
else if(node.x == NODE_TEX_COORD)
svm_node_tex_coord(kg, sd, stack, node.y, node.z);
else if(node.x == NODE_TEX_COORD_BUMP_DX)
svm_node_tex_coord_bump_dx(kg, sd, stack, node.y, node.z);
else if(node.x == NODE_TEX_COORD_BUMP_DY)
svm_node_tex_coord_bump_dy(kg, sd, stack, node.y, node.z);
else if(node.x == NODE_EMISSION_SET_WEIGHT_TOTAL)
svm_node_emission_set_weight_total(kg, sd, node.y, node.z, node.w);
else if(node.x == NODE_END)
break;
else
return;
}
sd->svm_closure_weight *= closure_weight;
}
CCL_NAMESPACE_END
#endif /* __SVM_H__ */
|
