intern/cycles/blender/blender_shader.cpp

   1 /*
   2  * Copyright 2011-2013 Blender Foundation
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "render/background.h"
  18 #include "render/graph.h"
  19 #include "render/light.h"
  20 #include "render/nodes.h"
  21 #include "render/osl.h"
  22 #include "render/scene.h"
  23 #include "render/shader.h"
  24
  25 #include "blender/blender_texture.h"
  26 #include "blender/blender_sync.h"
  27 #include "blender/blender_util.h"
  28
  29 #include "util/util_debug.h"
  30 #include "util/util_foreach.h"
  31 #include "util/util_string.h"
  32 #include "util/util_set.h"
  33 #include "util/util_task.h"
  34
  35 CCL_NAMESPACE_BEGIN
  36
  37 typedef map<void*, ShaderInput*> PtrInputMap;
  38 typedef map<void*, ShaderOutput*> PtrOutputMap;
  39 typedef map<string, ConvertNode*> ProxyMap;
  40
  41 /* Find */
  42
  43 void BlenderSync::find_shader(BL::ID& id,
  44                               vector<Shader*>& used_shaders,
  45                               Shader *default_shader)
  46 {
  47         Shader *shader = (id)? shader_map.find(id): default_shader;
  48
  49         used_shaders.push_back(shader);
  50         shader->tag_used(scene);
  51 }
  52
  53 /* RNA translation utilities */
  54
  55 static VolumeSampling get_volume_sampling(PointerRNA& ptr)
  56 {
  57         return (VolumeSampling)get_enum(ptr,
  58                                         "volume_sampling",
  59                                         VOLUME_NUM_SAMPLING,
  60                                         VOLUME_SAMPLING_DISTANCE);
  61 }
  62
  63 static VolumeInterpolation get_volume_interpolation(PointerRNA& ptr)
  64 {
  65         return (VolumeInterpolation)get_enum(ptr,
  66                                              "volume_interpolation",
  67                                              VOLUME_NUM_INTERPOLATION,
  68                                              VOLUME_INTERPOLATION_LINEAR);
  69 }
  70
  71 static DisplacementMethod get_displacement_method(PointerRNA& ptr)
  72 {
  73         return (DisplacementMethod)get_enum(ptr,
  74                                             "displacement_method",
  75                                             DISPLACE_NUM_METHODS,
  76                                             DISPLACE_BUMP);
  77 }
  78
  79 static int validate_enum_value(int value, int num_values, int default_value)
  80 {
  81         if(value >= num_values) {
  82                 return default_value;
  83         }
  84         return value;
  85 }
  86
  87 template<typename NodeType>
  88 static InterpolationType get_image_interpolation(NodeType& b_node)
  89 {
  90         int value = b_node.interpolation();
  91         return (InterpolationType)validate_enum_value(value,
  92                                                       INTERPOLATION_NUM_TYPES,
  93                                                       INTERPOLATION_LINEAR);
  94 }
  95
  96 template<typename NodeType>
  97 static ExtensionType get_image_extension(NodeType& b_node)
  98 {
  99         int value = b_node.extension();
 100         return (ExtensionType)validate_enum_value(value,
 101                                                   EXTENSION_NUM_TYPES,
 102                                                   EXTENSION_REPEAT);
 103 }
 104
 105 /* Graph */
 106
 107 static BL::NodeSocket get_node_output(BL::Node& b_node, const string& name)
 108 {
 109         BL::Node::outputs_iterator b_out;
 110
 111         for(b_node.outputs.begin(b_out); b_out != b_node.outputs.end(); ++b_out)
 112                 if(b_out->name() == name)
 113                         return *b_out;
 114
 115         assert(0);
 116
 117         return *b_out;
 118 }
 119
 120 static float3 get_node_output_rgba(BL::Node& b_node, const string& name)
 121 {
 122         BL::NodeSocket b_sock = get_node_output(b_node, name);
 123         float value[4];
 124         RNA_float_get_array(&b_sock.ptr, "default_value", value);
 125         return make_float3(value[0], value[1], value[2]);
 126 }
 127
 128 static float get_node_output_value(BL::Node& b_node, const string& name)
 129 {
 130         BL::NodeSocket b_sock = get_node_output(b_node, name);
 131         return RNA_float_get(&b_sock.ptr, "default_value");
 132 }
 133
 134 static float3 get_node_output_vector(BL::Node& b_node, const string& name)
 135 {
 136         BL::NodeSocket b_sock = get_node_output(b_node, name);
 137         float value[3];
 138         RNA_float_get_array(&b_sock.ptr, "default_value", value);
 139         return make_float3(value[0], value[1], value[2]);
 140 }
 141
 142 static SocketType::Type convert_socket_type(BL::NodeSocket& b_socket)
 143 {
 144         switch(b_socket.type()) {
 145                 case BL::NodeSocket::type_VALUE:
 146                         return SocketType::FLOAT;
 147                 case BL::NodeSocket::type_INT:
 148                         return SocketType::INT;
 149                 case BL::NodeSocket::type_VECTOR:
 150                         return SocketType::VECTOR;
 151                 case BL::NodeSocket::type_RGBA:
 152                         return SocketType::COLOR;
 153                 case BL::NodeSocket::type_STRING:
 154                         return SocketType::STRING;
 155                 case BL::NodeSocket::type_SHADER:
 156                         return SocketType::CLOSURE;
 157
 158                 default:
 159                         return SocketType::UNDEFINED;
 160         }
 161 }
 162
 163 static void set_default_value(ShaderInput *input,
 164                               BL::NodeSocket& b_sock,
 165                               BL::BlendData& b_data,
 166                               BL::ID& b_id)
 167 {
 168         Node *node = input->parent;
 169         const SocketType& socket = input->socket_type;
 170
 171         /* copy values for non linked inputs */
 172         switch(input->type()) {
 173                 case SocketType::FLOAT: {
 174                         node->set(socket, get_float(b_sock.ptr, "default_value"));
 175                         break;
 176                 }
 177                 case SocketType::INT: {
 178                         node->set(socket, get_int(b_sock.ptr, "default_value"));
 179                         break;
 180                 }
 181                 case SocketType::COLOR: {
 182                         node->set(socket, float4_to_float3(get_float4(b_sock.ptr, "default_value")));
 183                         break;
 184                 }
 185                 case SocketType::NORMAL:
 186                 case SocketType::POINT:
 187                 case SocketType::VECTOR: {
 188                         node->set(socket, get_float3(b_sock.ptr, "default_value"));
 189                         break;
 190                 }
 191                 case SocketType::STRING: {
 192                         node->set(socket, (ustring)blender_absolute_path(b_data, b_id, get_string(b_sock.ptr, "default_value")));
 193                         break;
 194                 }
 195                 default:
 196                         break;
 197         }
 198 }
 199
 200 static void get_tex_mapping(TextureMapping *mapping, BL::TexMapping& b_mapping)
 201 {
 202         if(!b_mapping)
 203                 return;
 204
 205         mapping->translation = get_float3(b_mapping.translation());
 206         mapping->rotation = get_float3(b_mapping.rotation());
 207         mapping->scale = get_float3(b_mapping.scale());
 208         mapping->type = (TextureMapping::Type)b_mapping.vector_type();
 209
 210         mapping->x_mapping = (TextureMapping::Mapping)b_mapping.mapping_x();
 211         mapping->y_mapping = (TextureMapping::Mapping)b_mapping.mapping_y();
 212         mapping->z_mapping = (TextureMapping::Mapping)b_mapping.mapping_z();
 213 }
 214
 215 static void get_tex_mapping(TextureMapping *mapping,
 216                             BL::ShaderNodeMapping& b_mapping)
 217 {
 218         if(!b_mapping)
 219                 return;
 220
 221         mapping->translation = get_float3(b_mapping.translation());
 222         mapping->rotation = get_float3(b_mapping.rotation());
 223         mapping->scale = get_float3(b_mapping.scale());
 224         mapping->type = (TextureMapping::Type)b_mapping.vector_type();
 225
 226         mapping->use_minmax = b_mapping.use_min() || b_mapping.use_max();
 227
 228         if(b_mapping.use_min())
 229                 mapping->min = get_float3(b_mapping.min());
 230         if(b_mapping.use_max())
 231                 mapping->max = get_float3(b_mapping.max());
 232 }
 233
 234 static bool is_output_node(BL::Node& b_node)
 235 {
 236         return (b_node.is_a(&RNA_ShaderNodeOutputMaterial)
 237                     || b_node.is_a(&RNA_ShaderNodeOutputWorld)
 238                     || b_node.is_a(&RNA_ShaderNodeOutputLamp));
 239 }
 240
 241 static ShaderNode *add_node(Scene *scene,
 242                             BL::RenderEngine& b_engine,
 243                             BL::BlendData& b_data,
 244                             BL::Scene& b_scene,
 245                             const bool background,
 246                             ShaderGraph *graph,
 247                             BL::ShaderNodeTree& b_ntree,
 248                             BL::ShaderNode& b_node)
 249 {
 250         ShaderNode *node = NULL;
 251
 252         /* existing blender nodes */
 253         if(b_node.is_a(&RNA_ShaderNodeRGBCurve)) {
 254                 BL::ShaderNodeRGBCurve b_curve_node(b_node);
 255                 BL::CurveMapping mapping(b_curve_node.mapping());
 256                 RGBCurvesNode *curves = new RGBCurvesNode();
 257                 curvemapping_color_to_array(mapping,
 258                                             curves->curves,
 259                                             RAMP_TABLE_SIZE,
 260                                             true);
 261                 curvemapping_minmax(mapping, true, &curves->min_x, &curves->max_x);
 262                 node = curves;
 263         }
 264         if(b_node.is_a(&RNA_ShaderNodeVectorCurve)) {
 265                 BL::ShaderNodeVectorCurve b_curve_node(b_node);
 266                 BL::CurveMapping mapping(b_curve_node.mapping());
 267                 VectorCurvesNode *curves = new VectorCurvesNode();
 268                 curvemapping_color_to_array(mapping,
 269                                             curves->curves,
 270                                             RAMP_TABLE_SIZE,
 271                                             false);
 272                 curvemapping_minmax(mapping, false, &curves->min_x, &curves->max_x);
 273                 node = curves;
 274         }
 275         else if(b_node.is_a(&RNA_ShaderNodeValToRGB)) {
 276                 RGBRampNode *ramp = new RGBRampNode();
 277                 BL::ShaderNodeValToRGB b_ramp_node(b_node);
 278                 BL::ColorRamp b_color_ramp(b_ramp_node.color_ramp());
 279                 colorramp_to_array(b_color_ramp, ramp->ramp, ramp->ramp_alpha, RAMP_TABLE_SIZE);
 280                 ramp->interpolate = b_color_ramp.interpolation() != BL::ColorRamp::interpolation_CONSTANT;
 281                 node = ramp;
 282         }
 283         else if(b_node.is_a(&RNA_ShaderNodeRGB)) {
 284                 ColorNode *color = new ColorNode();
 285                 color->value = get_node_output_rgba(b_node, "Color");
 286                 node = color;
 287         }
 288         else if(b_node.is_a(&RNA_ShaderNodeValue)) {
 289                 ValueNode *value = new ValueNode();
 290                 value->value = get_node_output_value(b_node, "Value");
 291                 node = value;
 292         }
 293         else if(b_node.is_a(&RNA_ShaderNodeCameraData)) {
 294                 node = new CameraNode();
 295         }
 296         else if(b_node.is_a(&RNA_ShaderNodeInvert)) {
 297                 node = new InvertNode();
 298         }
 299         else if(b_node.is_a(&RNA_ShaderNodeGamma)) {
 300                 node = new GammaNode();
 301         }
 302         else if(b_node.is_a(&RNA_ShaderNodeBrightContrast)) {
 303                 node = new BrightContrastNode();
 304         }
 305         else if(b_node.is_a(&RNA_ShaderNodeMixRGB)) {
 306                 BL::ShaderNodeMixRGB b_mix_node(b_node);
 307                 MixNode *mix = new MixNode();
 308                 mix->type = (NodeMix)b_mix_node.blend_type();
 309                 mix->use_clamp = b_mix_node.use_clamp();
 310                 node = mix;
 311         }
 312         else if(b_node.is_a(&RNA_ShaderNodeSeparateRGB)) {
 313                 node = new SeparateRGBNode();
 314         }
 315         else if(b_node.is_a(&RNA_ShaderNodeCombineRGB)) {
 316                 node = new CombineRGBNode();
 317         }
 318         else if(b_node.is_a(&RNA_ShaderNodeSeparateHSV)) {
 319                 node = new SeparateHSVNode();
 320         }
 321         else if(b_node.is_a(&RNA_ShaderNodeCombineHSV)) {
 322                 node = new CombineHSVNode();
 323         }
 324         else if(b_node.is_a(&RNA_ShaderNodeSeparateXYZ)) {
 325                 node = new SeparateXYZNode();
 326         }
 327         else if(b_node.is_a(&RNA_ShaderNodeCombineXYZ)) {
 328                 node = new CombineXYZNode();
 329         }
 330         else if(b_node.is_a(&RNA_ShaderNodeHueSaturation)) {
 331                 node = new HSVNode();
 332         }
 333         else if(b_node.is_a(&RNA_ShaderNodeRGBToBW)) {
 334                 node = new RGBToBWNode();
 335         }
 336         else if(b_node.is_a(&RNA_ShaderNodeMath)) {
 337                 BL::ShaderNodeMath b_math_node(b_node);
 338                 MathNode *math = new MathNode();
 339                 math->type = (NodeMath)b_math_node.operation();
 340                 math->use_clamp = b_math_node.use_clamp();
 341                 node = math;
 342         }
 343         else if(b_node.is_a(&RNA_ShaderNodeVectorMath)) {
 344                 BL::ShaderNodeVectorMath b_vector_math_node(b_node);
 345                 VectorMathNode *vmath = new VectorMathNode();
 346                 vmath->type = (NodeVectorMath)b_vector_math_node.operation();
 347                 node = vmath;
 348         }
 349         else if(b_node.is_a(&RNA_ShaderNodeVectorTransform)) {
 350                 BL::ShaderNodeVectorTransform b_vector_transform_node(b_node);
 351                 VectorTransformNode *vtransform = new VectorTransformNode();
 352                 vtransform->type = (NodeVectorTransformType)b_vector_transform_node.vector_type();
 353                 vtransform->convert_from = (NodeVectorTransformConvertSpace)b_vector_transform_node.convert_from();
 354                 vtransform->convert_to = (NodeVectorTransformConvertSpace)b_vector_transform_node.convert_to();
 355                 node = vtransform;
 356         }
 357         else if(b_node.is_a(&RNA_ShaderNodeNormal)) {
 358                 BL::Node::outputs_iterator out_it;
 359                 b_node.outputs.begin(out_it);
 360
 361                 NormalNode *norm = new NormalNode();
 362                 norm->direction = get_node_output_vector(b_node, "Normal");
 363                 node = norm;
 364         }
 365         else if(b_node.is_a(&RNA_ShaderNodeMapping)) {
 366                 BL::ShaderNodeMapping b_mapping_node(b_node);
 367                 MappingNode *mapping = new MappingNode();
 368
 369                 get_tex_mapping(&mapping->tex_mapping, b_mapping_node);
 370
 371                 node = mapping;
 372         }
 373         else if(b_node.is_a(&RNA_ShaderNodeFresnel)) {
 374                 node = new FresnelNode();
 375         }
 376         else if(b_node.is_a(&RNA_ShaderNodeLayerWeight)) {
 377                 node = new LayerWeightNode();
 378         }
 379         else if(b_node.is_a(&RNA_ShaderNodeAddShader)) {
 380                 node = new AddClosureNode();
 381         }
 382         else if(b_node.is_a(&RNA_ShaderNodeMixShader)) {
 383                 node = new MixClosureNode();
 384         }
 385         else if(b_node.is_a(&RNA_ShaderNodeAttribute)) {
 386                 BL::ShaderNodeAttribute b_attr_node(b_node);
 387                 AttributeNode *attr = new AttributeNode();
 388                 attr->attribute = b_attr_node.attribute_name();
 389                 node = attr;
 390         }
 391         else if(b_node.is_a(&RNA_ShaderNodeBackground)) {
 392                 node = new BackgroundNode();
 393         }
 394         else if(b_node.is_a(&RNA_ShaderNodeHoldout)) {
 395                 node = new HoldoutNode();
 396         }
 397         else if(b_node.is_a(&RNA_ShaderNodeBsdfAnisotropic)) {
 398                 BL::ShaderNodeBsdfAnisotropic b_aniso_node(b_node);
 399                 AnisotropicBsdfNode *aniso = new AnisotropicBsdfNode();
 400
 401                 switch(b_aniso_node.distribution()) {
 402                         case BL::ShaderNodeBsdfAnisotropic::distribution_BECKMANN:
 403                                 aniso->distribution = CLOSURE_BSDF_MICROFACET_BECKMANN_ANISO_ID;
 404                                 break;
 405                         case BL::ShaderNodeBsdfAnisotropic::distribution_GGX:
 406                                 aniso->distribution = CLOSURE_BSDF_MICROFACET_GGX_ANISO_ID;
 407                                 break;
 408                         case BL::ShaderNodeBsdfAnisotropic::distribution_MULTI_GGX:
 409                                 aniso->distribution = CLOSURE_BSDF_MICROFACET_MULTI_GGX_ANISO_ID;
 410                                 break;
 411                         case BL::ShaderNodeBsdfAnisotropic::distribution_ASHIKHMIN_SHIRLEY:
 412                                 aniso->distribution = CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ANISO_ID;
 413                                 break;
 414                 }
 415
 416                 node = aniso;
 417         }
 418         else if(b_node.is_a(&RNA_ShaderNodeBsdfDiffuse)) {
 419                 node = new DiffuseBsdfNode();
 420         }
 421         else if(b_node.is_a(&RNA_ShaderNodeSubsurfaceScattering)) {
 422                 BL::ShaderNodeSubsurfaceScattering b_subsurface_node(b_node);
 423
 424                 SubsurfaceScatteringNode *subsurface = new SubsurfaceScatteringNode();
 425
 426                 switch(b_subsurface_node.falloff()) {
 427                         case BL::ShaderNodeSubsurfaceScattering::falloff_CUBIC:
 428                                 subsurface->falloff = CLOSURE_BSSRDF_CUBIC_ID;
 429                                 break;
 430                         case BL::ShaderNodeSubsurfaceScattering::falloff_GAUSSIAN:
 431                                 subsurface->falloff = CLOSURE_BSSRDF_GAUSSIAN_ID;
 432                                 break;
 433                         case BL::ShaderNodeSubsurfaceScattering::falloff_BURLEY:
 434                                 subsurface->falloff = CLOSURE_BSSRDF_BURLEY_ID;
 435                                 break;
 436                 }
 437
 438                 node = subsurface;
 439         }
 440         else if(b_node.is_a(&RNA_ShaderNodeBsdfGlossy)) {
 441                 BL::ShaderNodeBsdfGlossy b_glossy_node(b_node);
 442                 GlossyBsdfNode *glossy = new GlossyBsdfNode();
 443
 444                 switch(b_glossy_node.distribution()) {
 445                         case BL::ShaderNodeBsdfGlossy::distribution_SHARP:
 446                                 glossy->distribution = CLOSURE_BSDF_REFLECTION_ID;
 447                                 break;
 448                         case BL::ShaderNodeBsdfGlossy::distribution_BECKMANN:
 449                                 glossy->distribution = CLOSURE_BSDF_MICROFACET_BECKMANN_ID;
 450                                 break;
 451                         case BL::ShaderNodeBsdfGlossy::distribution_GGX:
 452                                 glossy->distribution = CLOSURE_BSDF_MICROFACET_GGX_ID;
 453                                 break;
 454                         case BL::ShaderNodeBsdfGlossy::distribution_ASHIKHMIN_SHIRLEY:
 455                                 glossy->distribution = CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID;
 456                                 break;
 457                         case BL::ShaderNodeBsdfGlossy::distribution_MULTI_GGX:
 458                                 glossy->distribution = CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID;
 459                                 break;
 460                 }
 461                 node = glossy;
 462         }
 463         else if(b_node.is_a(&RNA_ShaderNodeBsdfGlass)) {
 464                 BL::ShaderNodeBsdfGlass b_glass_node(b_node);
 465                 GlassBsdfNode *glass = new GlassBsdfNode();
 466                 switch(b_glass_node.distribution()) {
 467                         case BL::ShaderNodeBsdfGlass::distribution_SHARP:
 468                                 glass->distribution = CLOSURE_BSDF_SHARP_GLASS_ID;
 469                                 break;
 470                         case BL::ShaderNodeBsdfGlass::distribution_BECKMANN:
 471                                 glass->distribution = CLOSURE_BSDF_MICROFACET_BECKMANN_GLASS_ID;
 472                                 break;
 473                         case BL::ShaderNodeBsdfGlass::distribution_GGX:
 474                                 glass->distribution = CLOSURE_BSDF_MICROFACET_GGX_GLASS_ID;
 475                                 break;
 476                         case BL::ShaderNodeBsdfGlass::distribution_MULTI_GGX:
 477                                 glass->distribution = CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID;
 478                                 break;
 479                 }
 480                 node = glass;
 481         }
 482         else if(b_node.is_a(&RNA_ShaderNodeBsdfRefraction)) {
 483                 BL::ShaderNodeBsdfRefraction b_refraction_node(b_node);
 484                 RefractionBsdfNode *refraction = new RefractionBsdfNode();
 485                 switch(b_refraction_node.distribution()) {
 486                         case BL::ShaderNodeBsdfRefraction::distribution_SHARP:
 487                                 refraction->distribution = CLOSURE_BSDF_REFRACTION_ID;
 488                                 break;
 489                         case BL::ShaderNodeBsdfRefraction::distribution_BECKMANN:
 490                                 refraction->distribution = CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID;
 491                                 break;
 492                         case BL::ShaderNodeBsdfRefraction::distribution_GGX:
 493                                 refraction->distribution = CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID;
 494                                 break;
 495                 }
 496                 node = refraction;
 497         }
 498         else if(b_node.is_a(&RNA_ShaderNodeBsdfToon)) {
 499                 BL::ShaderNodeBsdfToon b_toon_node(b_node);
 500                 ToonBsdfNode *toon = new ToonBsdfNode();
 501                 switch(b_toon_node.component()) {
 502                         case BL::ShaderNodeBsdfToon::component_DIFFUSE:
 503                                 toon->component = CLOSURE_BSDF_DIFFUSE_TOON_ID;
 504                                 break;
 505                         case BL::ShaderNodeBsdfToon::component_GLOSSY:
 506                                 toon->component = CLOSURE_BSDF_GLOSSY_TOON_ID;
 507                                 break;
 508                 }
 509                 node = toon;
 510         }
 511         else if(b_node.is_a(&RNA_ShaderNodeBsdfHair)) {
 512                 BL::ShaderNodeBsdfHair b_hair_node(b_node);
 513                 HairBsdfNode *hair = new HairBsdfNode();
 514                 switch(b_hair_node.component()) {
 515                         case BL::ShaderNodeBsdfHair::component_Reflection:
 516                                 hair->component = CLOSURE_BSDF_HAIR_REFLECTION_ID;
 517                                 break;
 518                         case BL::ShaderNodeBsdfHair::component_Transmission:
 519                                 hair->component = CLOSURE_BSDF_HAIR_TRANSMISSION_ID;
 520                                 break;
 521                 }
 522                 node = hair;
 523         }
 524         else if(b_node.is_a(&RNA_ShaderNodeBsdfPrincipled)) {
 525                 BL::ShaderNodeBsdfPrincipled b_principled_node(b_node);
 526                 PrincipledBsdfNode *principled = new PrincipledBsdfNode();
 527                 switch (b_principled_node.distribution()) {
 528                         case BL::ShaderNodeBsdfPrincipled::distribution_GGX:
 529                                 principled->distribution = CLOSURE_BSDF_MICROFACET_GGX_GLASS_ID;
 530                                 break;
 531                         case BL::ShaderNodeBsdfPrincipled::distribution_MULTI_GGX:
 532                                 principled->distribution = CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID;
 533                                 break;
 534                 }
 535                 node = principled;
 536         }
 537         else if(b_node.is_a(&RNA_ShaderNodeBsdfTranslucent)) {
 538                 node = new TranslucentBsdfNode();
 539         }
 540         else if(b_node.is_a(&RNA_ShaderNodeBsdfTransparent)) {
 541                 node = new TransparentBsdfNode();
 542         }
 543         else if(b_node.is_a(&RNA_ShaderNodeBsdfVelvet)) {
 544                 node = new VelvetBsdfNode();
 545         }
 546         else if(b_node.is_a(&RNA_ShaderNodeEmission)) {
 547                 node = new EmissionNode();
 548         }
 549         else if(b_node.is_a(&RNA_ShaderNodeAmbientOcclusion)) {
 550                 node = new AmbientOcclusionNode();
 551         }
 552         else if(b_node.is_a(&RNA_ShaderNodeVolumeScatter)) {
 553                 node = new ScatterVolumeNode();
 554         }
 555         else if(b_node.is_a(&RNA_ShaderNodeVolumeAbsorption)) {
 556                 node = new AbsorptionVolumeNode();
 557         }
 558         else if(b_node.is_a(&RNA_ShaderNodeNewGeometry)) {
 559                 node = new GeometryNode();
 560         }
 561         else if(b_node.is_a(&RNA_ShaderNodeWireframe)) {
 562                 BL::ShaderNodeWireframe b_wireframe_node(b_node);
 563                 WireframeNode *wire = new WireframeNode();
 564                 wire->use_pixel_size = b_wireframe_node.use_pixel_size();
 565                 node = wire;
 566         }
 567         else if(b_node.is_a(&RNA_ShaderNodeWavelength)) {
 568                 node = new WavelengthNode();
 569         }
 570         else if(b_node.is_a(&RNA_ShaderNodeBlackbody)) {
 571                 node = new BlackbodyNode();
 572         }
 573         else if(b_node.is_a(&RNA_ShaderNodeLightPath)) {
 574                 node = new LightPathNode();
 575         }
 576         else if(b_node.is_a(&RNA_ShaderNodeLightFalloff)) {
 577                 node = new LightFalloffNode();
 578         }
 579         else if(b_node.is_a(&RNA_ShaderNodeObjectInfo)) {
 580                 node = new ObjectInfoNode();
 581         }
 582         else if(b_node.is_a(&RNA_ShaderNodeParticleInfo)) {
 583                 node = new ParticleInfoNode();
 584         }
 585         else if(b_node.is_a(&RNA_ShaderNodeHairInfo)) {
 586                 node = new HairInfoNode();
 587         }
 588         else if(b_node.is_a(&RNA_ShaderNodeBump)) {
 589                 BL::ShaderNodeBump b_bump_node(b_node);
 590                 BumpNode *bump = new BumpNode();
 591                 bump->invert = b_bump_node.invert();
 592                 node = bump;
 593         }
 594         else if(b_node.is_a(&RNA_ShaderNodeScript)) {
 595 #ifdef WITH_OSL
 596                 if(scene->shader_manager->use_osl()) {
 597                         /* create script node */
 598                         BL::ShaderNodeScript b_script_node(b_node);
 599
 600                         OSLShaderManager *manager = (OSLShaderManager*)scene->shader_manager;
 601                         string bytecode_hash = b_script_node.bytecode_hash();
 602
 603                         if(!bytecode_hash.empty()) {
 604                                 node = manager->osl_node("", bytecode_hash, b_script_node.bytecode());
 605                         }
 606                         else {
 607                                 string absolute_filepath = blender_absolute_path(b_data, b_ntree, b_script_node.filepath());
 608                                 node = manager->osl_node(absolute_filepath, "");
 609                         }
 610                 }
 611 #else
 612                 (void)b_data;
 613                 (void)b_ntree;
 614 #endif
 615         }
 616         else if(b_node.is_a(&RNA_ShaderNodeTexImage)) {
 617                 BL::ShaderNodeTexImage b_image_node(b_node);
 618                 BL::Image b_image(b_image_node.image());
 619                 BL::ImageUser b_image_user(b_image_node.image_user());
 620                 ImageTextureNode *image = new ImageTextureNode();
 621                 if(b_image) {
 622                         /* builtin images will use callback-based reading because
 623                          * they could only be loaded correct from blender side
 624                          */
 625                         bool is_builtin = b_image.packed_file() ||
 626                                           b_image.source() == BL::Image::source_GENERATED ||
 627                                           b_image.source() == BL::Image::source_MOVIE ||
 628                                           (b_engine.is_preview() &&
 629                                            b_image.source() != BL::Image::source_SEQUENCE);
 630
 631                         if(is_builtin) {
 632                                 /* for builtin images we're using image datablock name to find an image to
 633                                  * read pixels from later
 634                                  *
 635                                  * also store frame number as well, so there's no differences in handling
 636                                  * builtin names for packed images and movies
 637                                  */
 638                                 int scene_frame = b_scene.frame_current();
 639                                 int image_frame = image_user_frame_number(b_image_user,
 640                                                                           scene_frame);
 641                                 image->filename = b_image.name() + "@" + string_printf("%d", image_frame);
 642                                 image->builtin_data = b_image.ptr.data;
 643                         }
 644                         else {
 645                                 image->filename = image_user_file_path(b_image_user,
 646                                                                        b_image,
 647                                                                        b_scene.frame_current());
 648                                 image->builtin_data = NULL;
 649                         }
 650
 651                         image->animated = b_image_node.image_user().use_auto_refresh();
 652                         image->use_alpha = b_image.use_alpha();
 653
 654                         /* TODO(sergey): Does not work properly when we change builtin type. */
 655                         if(b_image.is_updated()) {
 656                                 scene->image_manager->tag_reload_image(
 657                                         image->filename.string(),
 658                                         image->builtin_data,
 659                                         get_image_interpolation(b_image_node),
 660                                         get_image_extension(b_image_node),
 661                                         image->use_alpha);
 662                         }
 663                 }
 664                 image->color_space = (NodeImageColorSpace)b_image_node.color_space();
 665                 image->projection = (NodeImageProjection)b_image_node.projection();
 666                 image->interpolation = get_image_interpolation(b_image_node);
 667                 image->extension = get_image_extension(b_image_node);
 668                 image->projection_blend = b_image_node.projection_blend();
 669                 BL::TexMapping b_texture_mapping(b_image_node.texture_mapping());
 670                 get_tex_mapping(&image->tex_mapping, b_texture_mapping);
 671                 node = image;
 672         }
 673         else if(b_node.is_a(&RNA_ShaderNodeTexEnvironment)) {
 674                 BL::ShaderNodeTexEnvironment b_env_node(b_node);
 675                 BL::Image b_image(b_env_node.image());
 676                 BL::ImageUser b_image_user(b_env_node.image_user());
 677                 EnvironmentTextureNode *env = new EnvironmentTextureNode();
 678                 if(b_image) {
 679                         bool is_builtin = b_image.packed_file() ||
 680                                           b_image.source() == BL::Image::source_GENERATED ||
 681                                           b_image.source() == BL::Image::source_MOVIE ||
 682                                           (b_engine.is_preview() &&
 683                                            b_image.source() != BL::Image::source_SEQUENCE);
 684
 685                         if(is_builtin) {
 686                                 int scene_frame = b_scene.frame_current();
 687                                 int image_frame = image_user_frame_number(b_image_user,
 688                                                                           scene_frame);
 689                                 env->filename = b_image.name() + "@" + string_printf("%d", image_frame);
 690                                 env->builtin_data = b_image.ptr.data;
 691                         }
 692                         else {
 693                                 env->filename = image_user_file_path(b_image_user,
 694                                                                      b_image,
 695                                                                      b_scene.frame_current());
 696                                 env->builtin_data = NULL;
 697                         }
 698
 699                         env->animated = b_env_node.image_user().use_auto_refresh();
 700                         env->use_alpha = b_image.use_alpha();
 701
 702                         /* TODO(sergey): Does not work properly when we change builtin type. */
 703                         if(b_image.is_updated()) {
 704                                 scene->image_manager->tag_reload_image(
 705                                         env->filename.string(),
 706                                         env->builtin_data,
 707                                         get_image_interpolation(b_env_node),
 708                                         EXTENSION_REPEAT,
 709                                         env->use_alpha);
 710                         }
 711                 }
 712                 env->color_space = (NodeImageColorSpace)b_env_node.color_space();
 713                 env->interpolation = get_image_interpolation(b_env_node);
 714                 env->projection = (NodeEnvironmentProjection)b_env_node.projection();
 715                 BL::TexMapping b_texture_mapping(b_env_node.texture_mapping());
 716                 get_tex_mapping(&env->tex_mapping, b_texture_mapping);
 717                 node = env;
 718         }
 719         else if(b_node.is_a(&RNA_ShaderNodeTexGradient)) {
 720                 BL::ShaderNodeTexGradient b_gradient_node(b_node);
 721                 GradientTextureNode *gradient = new GradientTextureNode();
 722                 gradient->type = (NodeGradientType)b_gradient_node.gradient_type();
 723                 BL::TexMapping b_texture_mapping(b_gradient_node.texture_mapping());
 724                 get_tex_mapping(&gradient->tex_mapping, b_texture_mapping);
 725                 node = gradient;
 726         }
 727         else if(b_node.is_a(&RNA_ShaderNodeTexVoronoi)) {
 728                 BL::ShaderNodeTexVoronoi b_voronoi_node(b_node);
 729                 VoronoiTextureNode *voronoi = new VoronoiTextureNode();
 730                 voronoi->coloring = (NodeVoronoiColoring)b_voronoi_node.coloring();
 731                 BL::TexMapping b_texture_mapping(b_voronoi_node.texture_mapping());
 732                 get_tex_mapping(&voronoi->tex_mapping, b_texture_mapping);
 733                 node = voronoi;
 734         }
 735         else if(b_node.is_a(&RNA_ShaderNodeTexMagic)) {
 736                 BL::ShaderNodeTexMagic b_magic_node(b_node);
 737                 MagicTextureNode *magic = new MagicTextureNode();
 738                 magic->depth = b_magic_node.turbulence_depth();
 739                 BL::TexMapping b_texture_mapping(b_magic_node.texture_mapping());
 740                 get_tex_mapping(&magic->tex_mapping, b_texture_mapping);
 741                 node = magic;
 742         }
 743         else if(b_node.is_a(&RNA_ShaderNodeTexWave)) {
 744                 BL::ShaderNodeTexWave b_wave_node(b_node);
 745                 WaveTextureNode *wave = new WaveTextureNode();
 746                 wave->type = (NodeWaveType)b_wave_node.wave_type();
 747                 wave->profile = (NodeWaveProfile)b_wave_node.wave_profile();
 748                 BL::TexMapping b_texture_mapping(b_wave_node.texture_mapping());
 749                 get_tex_mapping(&wave->tex_mapping, b_texture_mapping);
 750                 node = wave;
 751         }
 752         else if(b_node.is_a(&RNA_ShaderNodeTexChecker)) {
 753                 BL::ShaderNodeTexChecker b_checker_node(b_node);
 754                 CheckerTextureNode *checker = new CheckerTextureNode();
 755                 BL::TexMapping b_texture_mapping(b_checker_node.texture_mapping());
 756                 get_tex_mapping(&checker->tex_mapping, b_texture_mapping);
 757                 node = checker;
 758         }
 759         else if(b_node.is_a(&RNA_ShaderNodeTexBrick)) {
 760                 BL::ShaderNodeTexBrick b_brick_node(b_node);
 761                 BrickTextureNode *brick = new BrickTextureNode();
 762                 brick->offset = b_brick_node.offset();
 763                 brick->offset_frequency = b_brick_node.offset_frequency();
 764                 brick->squash = b_brick_node.squash();
 765                 brick->squash_frequency = b_brick_node.squash_frequency();
 766                 BL::TexMapping b_texture_mapping(b_brick_node.texture_mapping());
 767                 get_tex_mapping(&brick->tex_mapping, b_texture_mapping);
 768                 node = brick;
 769         }
 770         else if(b_node.is_a(&RNA_ShaderNodeTexNoise)) {
 771                 BL::ShaderNodeTexNoise b_noise_node(b_node);
 772                 NoiseTextureNode *noise = new NoiseTextureNode();
 773                 BL::TexMapping b_texture_mapping(b_noise_node.texture_mapping());
 774                 get_tex_mapping(&noise->tex_mapping, b_texture_mapping);
 775                 node = noise;
 776         }
 777         else if(b_node.is_a(&RNA_ShaderNodeTexMusgrave)) {
 778                 BL::ShaderNodeTexMusgrave b_musgrave_node(b_node);
 779                 MusgraveTextureNode *musgrave = new MusgraveTextureNode();
 780                 musgrave->type = (NodeMusgraveType)b_musgrave_node.musgrave_type();
 781                 BL::TexMapping b_texture_mapping(b_musgrave_node.texture_mapping());
 782                 get_tex_mapping(&musgrave->tex_mapping, b_texture_mapping);
 783                 node = musgrave;
 784         }
 785         else if(b_node.is_a(&RNA_ShaderNodeTexCoord)) {
 786                 BL::ShaderNodeTexCoord b_tex_coord_node(b_node);
 787                 TextureCoordinateNode *tex_coord = new TextureCoordinateNode();
 788                 tex_coord->from_dupli = b_tex_coord_node.from_dupli();
 789                 if(b_tex_coord_node.object()) {
 790                         tex_coord->use_transform = true;
 791                         tex_coord->ob_tfm = get_transform(b_tex_coord_node.object().matrix_world());
 792                 }
 793                 node = tex_coord;
 794         }
 795         else if(b_node.is_a(&RNA_ShaderNodeTexSky)) {
 796                 BL::ShaderNodeTexSky b_sky_node(b_node);
 797                 SkyTextureNode *sky = new SkyTextureNode();
 798                 sky->type = (NodeSkyType)b_sky_node.sky_type();
 799                 sky->sun_direction = normalize(get_float3(b_sky_node.sun_direction()));
 800                 sky->turbidity = b_sky_node.turbidity();
 801                 sky->ground_albedo = b_sky_node.ground_albedo();
 802                 BL::TexMapping b_texture_mapping(b_sky_node.texture_mapping());
 803                 get_tex_mapping(&sky->tex_mapping, b_texture_mapping);
 804                 node = sky;
 805         }
 806         else if(b_node.is_a(&RNA_ShaderNodeNormalMap)) {
 807                 BL::ShaderNodeNormalMap b_normal_map_node(b_node);
 808                 NormalMapNode *nmap = new NormalMapNode();
 809                 nmap->space = (NodeNormalMapSpace)b_normal_map_node.space();
 810                 nmap->attribute = b_normal_map_node.uv_map();
 811                 node = nmap;
 812         }
 813         else if(b_node.is_a(&RNA_ShaderNodeTangent)) {
 814                 BL::ShaderNodeTangent b_tangent_node(b_node);
 815                 TangentNode *tangent = new TangentNode();
 816                 tangent->direction_type = (NodeTangentDirectionType)b_tangent_node.direction_type();
 817                 tangent->axis = (NodeTangentAxis)b_tangent_node.axis();
 818                 tangent->attribute = b_tangent_node.uv_map();
 819                 node = tangent;
 820         }
 821         else if(b_node.is_a(&RNA_ShaderNodeUVMap)) {
 822                 BL::ShaderNodeUVMap b_uvmap_node(b_node);
 823                 UVMapNode *uvm = new UVMapNode();
 824                 uvm->attribute = b_uvmap_node.uv_map();
 825                 uvm->from_dupli = b_uvmap_node.from_dupli();
 826                 node = uvm;
 827         }
 828         else if(b_node.is_a(&RNA_ShaderNodeTexPointDensity)) {
 829                 BL::ShaderNodeTexPointDensity b_point_density_node(b_node);
 830                 PointDensityTextureNode *point_density = new PointDensityTextureNode();
 831                 point_density->filename = b_point_density_node.name();
 832                 point_density->space = (NodeTexVoxelSpace)b_point_density_node.space();
 833                 point_density->interpolation = get_image_interpolation(b_point_density_node);
 834                 point_density->builtin_data = b_point_density_node.ptr.data;
 835
 836                 /* 1 - render settings, 0 - vewport settings. */
 837                 int settings = background ? 1 : 0;
 838
 839                 /* TODO(sergey): Use more proper update flag. */
 840                 if(true) {
 841                         b_point_density_node.cache_point_density(b_scene, settings);
 842                         scene->image_manager->tag_reload_image(
 843                                 point_density->filename.string(),
 844                                 point_density->builtin_data,
 845                                 point_density->interpolation,
 846                                 EXTENSION_CLIP,
 847                                 true);
 848                 }
 849                 node = point_density;
 850
 851                 /* Transformation form world space to texture space.
 852                  *
 853                  * NOTE: Do this after the texture is cached, this is because getting
 854                  * min/max will need to access this cache.
 855                  */
 856                 BL::Object b_ob(b_point_density_node.object());
 857                 if(b_ob) {
 858                         float3 loc, size;
 859                         point_density_texture_space(b_scene,
 860                                                     b_point_density_node,
 861                                                     settings,
 862                                                     loc,
 863                                                     size);
 864                         point_density->tfm =
 865                                 transform_translate(-loc) * transform_scale(size) *
 866                                 transform_inverse(get_transform(b_ob.matrix_world()));
 867                 }
 868         }
 869         else if(b_node.is_a(&RNA_ShaderNodeBevel)) {
 870                 BL::ShaderNodeBevel b_bevel_node(b_node);
 871                 BevelNode *bevel = new BevelNode();
 872                 bevel->samples = b_bevel_node.samples();
 873                 node = bevel;
 874         }
 875         else if(b_node.is_a(&RNA_ShaderNodeDisplacement)) {
 876                 node = new DisplacementNode();
 877         }
 878
 879         if(node) {
 880                 node->name = b_node.name();
 881                 graph->add(node);
 882         }
 883
 884         return node;
 885 }
 886
 887 static bool node_use_modified_socket_name(ShaderNode *node)
 888 {
 889         if(node->special_type == SHADER_SPECIAL_TYPE_SCRIPT)
 890                 return false;
 891
 892         return true;
 893 }
 894
 895 static ShaderInput *node_find_input_by_name(ShaderNode *node,
 896                                             BL::Node& b_node,
 897                                             BL::NodeSocket& b_socket)
 898 {
 899         string name = b_socket.name();
 900
 901         if(node_use_modified_socket_name(node)) {
 902                 BL::Node::inputs_iterator b_input;
 903                 bool found = false;
 904                 int counter = 0, total = 0;
 905
 906                 for(b_node.inputs.begin(b_input); b_input != b_node.inputs.end(); ++b_input) {
 907                         if(b_input->name() == name) {
 908                                 if(!found)
 909                                         counter++;
 910                                 total++;
 911                         }
 912
 913                         if(b_input->ptr.data == b_socket.ptr.data)
 914                                 found = true;
 915                 }
 916
 917                 /* rename if needed */
 918                 if(name == "Shader")
 919                         name = "Closure";
 920
 921                 if(total > 1)
 922                         name = string_printf("%s%d", name.c_str(), counter);
 923         }
 924
 925         return node->input(name.c_str());
 926 }
 927
 928 static ShaderOutput *node_find_output_by_name(ShaderNode *node,
 929                                               BL::Node& b_node,
 930                                               BL::NodeSocket& b_socket)
 931 {
 932         string name = b_socket.name();
 933
 934         if(node_use_modified_socket_name(node)) {
 935                 BL::Node::outputs_iterator b_output;
 936                 bool found = false;
 937                 int counter = 0, total = 0;
 938
 939                 for(b_node.outputs.begin(b_output); b_output != b_node.outputs.end(); ++b_output) {
 940                         if(b_output->name() == name) {
 941                                 if(!found)
 942                                         counter++;
 943                                 total++;
 944                         }
 945
 946                         if(b_output->ptr.data == b_socket.ptr.data)
 947                                 found = true;
 948                 }
 949
 950                 /* rename if needed */
 951                 if(name == "Shader")
 952                         name = "Closure";
 953
 954                 if(total > 1)
 955                         name = string_printf("%s%d", name.c_str(), counter);
 956         }
 957
 958         return node->output(name.c_str());
 959 }
 960
 961 static void add_nodes(Scene *scene,
 962                       BL::RenderEngine& b_engine,
 963                       BL::BlendData& b_data,
 964                       BL::Scene& b_scene,
 965                       const bool background,
 966                       ShaderGraph *graph,
 967                       BL::ShaderNodeTree& b_ntree,
 968                       const ProxyMap &proxy_input_map,
 969                       const ProxyMap &proxy_output_map)
 970 {
 971         /* add nodes */
 972         BL::ShaderNodeTree::nodes_iterator b_node;
 973         PtrInputMap input_map;
 974         PtrOutputMap output_map;
 975
 976         BL::Node::inputs_iterator b_input;
 977         BL::Node::outputs_iterator b_output;
 978
 979         /* find the node to use for output if there are multiple */
 980         bool found_active_output = false;
 981         BL::ShaderNode output_node(PointerRNA_NULL);
 982
 983         for(b_ntree.nodes.begin(b_node); b_node != b_ntree.nodes.end(); ++b_node) {
 984                 if(is_output_node(*b_node)) {
 985                         BL::ShaderNodeOutputMaterial b_output_node(*b_node);
 986
 987                         if(b_output_node.is_active_output()) {
 988                                 output_node = b_output_node;
 989                                 found_active_output = true;
 990                                 break;
 991                         }
 992                         else if(!output_node.ptr.data && !found_active_output) {
 993                                 output_node = b_output_node;
 994                         }
 995                 }
 996         }
 997
 998         /* add nodes */
 999         for(b_ntree.nodes.begin(b_node); b_node != b_ntree.nodes.end(); ++b_node) {
1000                 if(b_node->mute() || b_node->is_a(&RNA_NodeReroute)) {
1001                         /* replace muted node with internal links */
1002                         BL::Node::internal_links_iterator b_link;
1003                         for(b_node->internal_links.begin(b_link); b_link != b_node->internal_links.end(); ++b_link) {
1004                                 BL::NodeSocket to_socket(b_link->to_socket());
1005                                 SocketType::Type to_socket_type = convert_socket_type(to_socket);
1006                                 ConvertNode *proxy = new ConvertNode(to_socket_type, to_socket_type, true);
1007
1008                                 input_map[b_link->from_socket().ptr.data] = proxy->inputs[0];
1009                                 output_map[b_link->to_socket().ptr.data] = proxy->outputs[0];
1010
1011                                 graph->add(proxy);
1012                         }
1013                 }
1014                 else if(b_node->is_a(&RNA_ShaderNodeGroup) || b_node->is_a(&RNA_NodeCustomGroup)) {
1015
1016                         BL::ShaderNodeTree b_group_ntree(PointerRNA_NULL);
1017                         if(b_node->is_a(&RNA_ShaderNodeGroup))
1018                                 b_group_ntree = BL::ShaderNodeTree(((BL::NodeGroup)(*b_node)).node_tree());
1019                         else
1020                                 b_group_ntree = BL::ShaderNodeTree(((BL::NodeCustomGroup)(*b_node)).node_tree());
1021                         ProxyMap group_proxy_input_map, group_proxy_output_map;
1022
1023                         /* Add a proxy node for each socket
1024                          * Do this even if the node group has no internal tree,
1025                          * so that links have something to connect to and assert won't fail.
1026                          */
1027                         for(b_node->inputs.begin(b_input); b_input != b_node->inputs.end(); ++b_input) {
1028                                 SocketType::Type input_type = convert_socket_type(*b_input);
1029                                 ConvertNode *proxy = new ConvertNode(input_type, input_type, true);
1030                                 graph->add(proxy);
1031
1032                                 /* register the proxy node for internal binding */
1033                                 group_proxy_input_map[b_input->identifier()] = proxy;
1034
1035                                 input_map[b_input->ptr.data] = proxy->inputs[0];
1036
1037                                 set_default_value(proxy->inputs[0], *b_input, b_data, b_ntree);
1038                         }
1039                         for(b_node->outputs.begin(b_output); b_output != b_node->outputs.end(); ++b_output) {
1040                                 SocketType::Type output_type = convert_socket_type(*b_output);
1041                                 ConvertNode *proxy = new ConvertNode(output_type, output_type, true);
1042                                 graph->add(proxy);
1043
1044                                 /* register the proxy node for internal binding */
1045                                 group_proxy_output_map[b_output->identifier()] = proxy;
1046
1047                                 output_map[b_output->ptr.data] = proxy->outputs[0];
1048                         }
1049
1050                         if(b_group_ntree) {
1051                                 add_nodes(scene,
1052                                           b_engine,
1053                                           b_data,
1054                                           b_scene,
1055                                           background,
1056                                           graph,
1057                                           b_group_ntree,
1058                                           group_proxy_input_map,
1059                                           group_proxy_output_map);
1060                         }
1061                 }
1062                 else if(b_node->is_a(&RNA_NodeGroupInput)) {
1063                         /* map each socket to a proxy node */
1064                         for(b_node->outputs.begin(b_output); b_output != b_node->outputs.end(); ++b_output) {
1065                                 ProxyMap::const_iterator proxy_it = proxy_input_map.find(b_output->identifier());
1066                                 if(proxy_it != proxy_input_map.end()) {
1067                                         ConvertNode *proxy = proxy_it->second;
1068
1069                                         output_map[b_output->ptr.data] = proxy->outputs[0];
1070                                 }
1071                         }
1072                 }
1073                 else if(b_node->is_a(&RNA_NodeGroupOutput)) {
1074                         BL::NodeGroupOutput b_output_node(*b_node);
1075                         /* only the active group output is used */
1076                         if(b_output_node.is_active_output()) {
1077                                 /* map each socket to a proxy node */
1078                                 for(b_node->inputs.begin(b_input); b_input != b_node->inputs.end(); ++b_input) {
1079                                         ProxyMap::const_iterator proxy_it = proxy_output_map.find(b_input->identifier());
1080                                         if(proxy_it != proxy_output_map.end()) {
1081                                                 ConvertNode *proxy = proxy_it->second;
1082
1083                                                 input_map[b_input->ptr.data] = proxy->inputs[0];
1084
1085                                                 set_default_value(proxy->inputs[0], *b_input, b_data, b_ntree);
1086                                         }
1087                                 }
1088                         }
1089                 }
1090                 else {
1091                         ShaderNode *node = NULL;
1092
1093                         if(is_output_node(*b_node)) {
1094                                 if(b_node->ptr.data == output_node.ptr.data) {
1095                                         node = graph->output();
1096                                 }
1097                         }
1098                         else {
1099                                 BL::ShaderNode b_shader_node(*b_node);
1100                                 node = add_node(scene,
1101                                                 b_engine,
1102                                                 b_data,
1103                                                 b_scene,
1104                                                 background,
1105                                                 graph,
1106                                                 b_ntree,
1107                                                 b_shader_node);
1108                         }
1109
1110                         if(node) {
1111                                 /* map node sockets for linking */
1112                                 for(b_node->inputs.begin(b_input); b_input != b_node->inputs.end(); ++b_input) {
1113                                         ShaderInput *input = node_find_input_by_name(node, *b_node, *b_input);
1114                                         if(!input) {
1115                                                 /* XXX should not happen, report error? */
1116                                                 continue;
1117                                         }
1118                                         input_map[b_input->ptr.data] = input;
1119
1120                                         set_default_value(input, *b_input, b_data, b_ntree);
1121                                 }
1122                                 for(b_node->outputs.begin(b_output); b_output != b_node->outputs.end(); ++b_output) {
1123                                         ShaderOutput *output = node_find_output_by_name(node, *b_node, *b_output);
1124                                         if(!output) {
1125                                                 /* XXX should not happen, report error? */
1126                                                 continue;
1127                                         }
1128                                         output_map[b_output->ptr.data] = output;
1129                                 }
1130                         }
1131                 }
1132         }
1133
1134         /* connect nodes */
1135         BL::NodeTree::links_iterator b_link;
1136
1137         for(b_ntree.links.begin(b_link); b_link != b_ntree.links.end(); ++b_link) {
1138                 /* Ignore invalid links to avoid unwanted cycles created in graph. */
1139                 if(!b_link->is_valid()) {
1140                         continue;
1141                 }
1142                 /* get blender link data */
1143                 BL::NodeSocket b_from_sock = b_link->from_socket();
1144                 BL::NodeSocket b_to_sock = b_link->to_socket();
1145
1146                 ShaderOutput *output = 0;
1147                 ShaderInput *input = 0;
1148
1149                 PtrOutputMap::iterator output_it = output_map.find(b_from_sock.ptr.data);
1150                 if(output_it != output_map.end())
1151                         output = output_it->second;
1152                 PtrInputMap::iterator input_it = input_map.find(b_to_sock.ptr.data);
1153                 if(input_it != input_map.end())
1154                         input = input_it->second;
1155
1156                 /* either node may be NULL when the node was not exported, typically
1157                  * because the node type is not supported */
1158                 if(output && input)
1159                         graph->connect(output, input);
1160         }
1161 }
1162
1163 static void add_nodes(Scene *scene,
1164                       BL::RenderEngine& b_engine,
1165                       BL::BlendData& b_data,
1166                       BL::Scene& b_scene,
1167                       const bool background,
1168                       ShaderGraph *graph,
1169                       BL::ShaderNodeTree& b_ntree)
1170 {
1171         static const ProxyMap empty_proxy_map;
1172         add_nodes(scene,
1173                   b_engine,
1174                   b_data,
1175                   b_scene,
1176                   background,
1177                   graph,
1178                   b_ntree,
1179                   empty_proxy_map,
1180                   empty_proxy_map);
1181 }
1182
1183 /* Sync Materials */
1184
1185 void BlenderSync::sync_materials(bool update_all)
1186 {
1187         shader_map.set_default(scene->default_surface);
1188
1189         /* material loop */
1190         BL::BlendData::materials_iterator b_mat;
1191
1192         TaskPool pool;
1193         set<Shader*> updated_shaders;
1194
1195         for(b_data.materials.begin(b_mat); b_mat != b_data.materials.end(); ++b_mat) {
1196                 Shader *shader;
1197
1198                 /* test if we need to sync */
1199                 if(shader_map.sync(&shader, *b_mat) || update_all) {
1200                         ShaderGraph *graph = new ShaderGraph();
1201
1202                         shader->name = b_mat->name().c_str();
1203                         shader->pass_id = b_mat->pass_index();
1204
1205                         /* create nodes */
1206                         if(b_mat->use_nodes() && b_mat->node_tree()) {
1207                                 BL::ShaderNodeTree b_ntree(b_mat->node_tree());
1208
1209                                 add_nodes(scene, b_engine, b_data, b_scene, !preview, graph, b_ntree);
1210                         }
1211                         else {
1212                                 DiffuseBsdfNode *diffuse = new DiffuseBsdfNode();
1213                                 diffuse->color = get_float3(b_mat->diffuse_color());
1214                                 graph->add(diffuse);
1215
1216                                 ShaderNode *out = graph->output();
1217                                 graph->connect(diffuse->output("BSDF"), out->input("Surface"));
1218                         }
1219
1220                         /* settings */
1221                         PointerRNA cmat = RNA_pointer_get(&b_mat->ptr, "cycles");
1222                         shader->use_mis = get_boolean(cmat, "sample_as_light");
1223                         shader->use_transparent_shadow = get_boolean(cmat, "use_transparent_shadow");
1224                         shader->heterogeneous_volume = !get_boolean(cmat, "homogeneous_volume");
1225                         shader->volume_sampling_method = get_volume_sampling(cmat);
1226                         shader->volume_interpolation_method = get_volume_interpolation(cmat);
1227                         shader->displacement_method = (experimental) ? get_displacement_method(cmat) : DISPLACE_BUMP;
1228
1229                         shader->set_graph(graph);
1230
1231                         /* By simplifying the shader graph as soon as possible, some
1232                          * redundant shader nodes might be removed which prevents loading
1233                          * unnecessary attributes later.
1234                          *
1235                          * However, since graph simplification also accounts for e.g. mix
1236                          * weight, this would cause frequent expensive resyncs in interactive
1237                          * sessions, so for those sessions optimization is only performed
1238                          * right before compiling.
1239                          */
1240                         if(!preview) {
1241                                 pool.push(function_bind(&ShaderGraph::simplify, graph, scene));
1242                                 /* NOTE: Update shaders out of the threads since those routines
1243                                  * are accessing and writing to a global context.
1244                                  */
1245                                 updated_shaders.insert(shader);
1246                         }
1247                         else {
1248                                 /* NOTE: Update tagging can access links which are being
1249                                  * optimized out.
1250                                  */
1251                                 shader->tag_update(scene);
1252                         }
1253                 }
1254         }
1255
1256         pool.wait_work();
1257
1258         foreach(Shader *shader, updated_shaders) {
1259                 shader->tag_update(scene);
1260         }
1261 }
1262
1263 /* Sync World */
1264
1265 void BlenderSync::sync_world(bool update_all)
1266 {
1267         Background *background = scene->background;
1268         Background prevbackground = *background;
1269
1270         BL::World b_world = b_scene.world();
1271
1272         if(world_recalc || update_all || b_world.ptr.data != world_map) {
1273                 Shader *shader = scene->default_background;
1274                 ShaderGraph *graph = new ShaderGraph();
1275
1276                 /* create nodes */
1277                 if(b_world && b_world.use_nodes() && b_world.node_tree()) {
1278                         BL::ShaderNodeTree b_ntree(b_world.node_tree());
1279
1280                         add_nodes(scene, b_engine, b_data, b_scene, !preview, graph, b_ntree);
1281
1282                         /* volume */
1283                         PointerRNA cworld = RNA_pointer_get(&b_world.ptr, "cycles");
1284                         shader->heterogeneous_volume = !get_boolean(cworld, "homogeneous_volume");
1285                         shader->volume_sampling_method = get_volume_sampling(cworld);
1286                         shader->volume_interpolation_method = get_volume_interpolation(cworld);
1287                 }
1288                 else if(b_world) {
1289                         BackgroundNode *background = new BackgroundNode();
1290                         background->color = get_float3(b_world.horizon_color());
1291                         graph->add(background);
1292
1293                         ShaderNode *out = graph->output();
1294                         graph->connect(background->output("Background"), out->input("Surface"));
1295                 }
1296
1297                 if(b_world) {
1298                         /* AO */
1299                         BL::WorldLighting b_light = b_world.light_settings();
1300
1301                         background->use_ao = b_light.use_ambient_occlusion();
1302                         background->ao_factor = b_light.ao_factor();
1303                         background->ao_distance = b_light.distance();
1304
1305                         /* visibility */
1306                         PointerRNA cvisibility = RNA_pointer_get(&b_world.ptr, "cycles_visibility");
1307                         uint visibility = 0;
1308
1309                         visibility |= get_boolean(cvisibility, "camera")? PATH_RAY_CAMERA: 0;
1310                         visibility |= get_boolean(cvisibility, "diffuse")? PATH_RAY_DIFFUSE: 0;
1311                         visibility |= get_boolean(cvisibility, "glossy")? PATH_RAY_GLOSSY: 0;
1312                         visibility |= get_boolean(cvisibility, "transmission")? PATH_RAY_TRANSMIT: 0;
1313                         visibility |= get_boolean(cvisibility, "scatter")? PATH_RAY_VOLUME_SCATTER: 0;
1314
1315                         background->visibility = visibility;
1316                 }
1317                 else {
1318                         background->use_ao = false;
1319                         background->ao_factor = 0.0f;
1320                         background->ao_distance = FLT_MAX;
1321                 }
1322
1323                 shader->set_graph(graph);
1324                 shader->tag_update(scene);
1325                 background->tag_update(scene);
1326         }
1327
1328         PointerRNA cscene = RNA_pointer_get(&b_scene.ptr, "cycles");
1329
1330         /* when doing preview render check for BI's transparency settings,
1331          * this is so because Blender's preview render routines are not able
1332          * to tweak all cycles's settings depending on different circumstances
1333          */
1334         if(b_engine.is_preview() == false)
1335                 background->transparent = get_boolean(cscene, "film_transparent");
1336         else
1337                 background->transparent = b_scene.render().alpha_mode() == BL::RenderSettings::alpha_mode_TRANSPARENT;
1338
1339         if(background->transparent) {
1340                 background->transparent_glass = get_boolean(cscene, "film_transparent_glass");
1341                 background->transparent_roughness_threshold = get_float(cscene, "film_transparent_roughness");
1342         }
1343         else {
1344                 background->transparent_glass = false;
1345                 background->transparent_roughness_threshold = 0.0f;
1346         }
1347
1348         background->use_shader = render_layer.use_background_shader;
1349         background->use_ao = background->use_ao && render_layer.use_background_ao;
1350
1351         if(background->modified(prevbackground))
1352                 background->tag_update(scene);
1353 }
1354
1355 /* Sync Lamps */
1356
1357 void BlenderSync::sync_lamps(bool update_all)
1358 {
1359         shader_map.set_default(scene->default_light);
1360
1361         /* lamp loop */
1362         BL::BlendData::lamps_iterator b_lamp;
1363
1364         for(b_data.lamps.begin(b_lamp); b_lamp != b_data.lamps.end(); ++b_lamp) {
1365                 Shader *shader;
1366
1367                 /* test if we need to sync */
1368                 if(shader_map.sync(&shader, *b_lamp) || update_all) {
1369                         ShaderGraph *graph = new ShaderGraph();
1370
1371                         /* create nodes */
1372                         if(b_lamp->use_nodes() && b_lamp->node_tree()) {
1373                                 shader->name = b_lamp->name().c_str();
1374
1375                                 BL::ShaderNodeTree b_ntree(b_lamp->node_tree());
1376
1377                                 add_nodes(scene, b_engine, b_data, b_scene, !preview, graph, b_ntree);
1378                         }
1379                         else {
1380                                 float strength = 1.0f;
1381
1382                                 if(b_lamp->type() == BL::Lamp::type_POINT ||
1383                                    b_lamp->type() == BL::Lamp::type_SPOT ||
1384                                    b_lamp->type() == BL::Lamp::type_AREA)
1385                                 {
1386                                         strength = 100.0f;
1387                                 }
1388
1389                                 EmissionNode *emission = new EmissionNode();
1390                                 emission->color = get_float3(b_lamp->color());
1391                                 emission->strength = strength;
1392                                 graph->add(emission);
1393
1394                                 ShaderNode *out = graph->output();
1395                                 graph->connect(emission->output("Emission"), out->input("Surface"));
1396                         }
1397
1398                         shader->set_graph(graph);
1399                         shader->tag_update(scene);
1400                 }
1401         }
1402 }
1403
1404 void BlenderSync::sync_shaders()
1405 {
1406         /* for auto refresh images */
1407         bool auto_refresh_update = false;
1408
1409         if(preview) {
1410                 ImageManager *image_manager = scene->image_manager;
1411                 int frame = b_scene.frame_current();
1412                 auto_refresh_update = image_manager->set_animation_frame_update(frame);
1413         }
1414
1415         shader_map.pre_sync();
1416
1417         sync_world(auto_refresh_update);
1418         sync_lamps(auto_refresh_update);
1419         sync_materials(auto_refresh_update);
1420
1421         /* false = don't delete unused shaders, not supported */
1422         shader_map.post_sync(false);
1423 }
1424
1425 CCL_NAMESPACE_END
1426