intern/cycles/blender/blender_session.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 <stdlib.h>
  18
  19 #include "render/background.h"
  20 #include "render/buffers.h"
  21 #include "render/camera.h"
  22 #include "device/device.h"
  23 #include "render/integrator.h"
  24 #include "render/film.h"
  25 #include "render/light.h"
  26 #include "render/mesh.h"
  27 #include "render/object.h"
  28 #include "render/scene.h"
  29 #include "render/session.h"
  30 #include "render/shader.h"
  31
  32 #include "util/util_color.h"
  33 #include "util/util_foreach.h"
  34 #include "util/util_function.h"
  35 #include "util/util_hash.h"
  36 #include "util/util_logging.h"
  37 #include "util/util_progress.h"
  38 #include "util/util_time.h"
  39
  40 #include "blender/blender_sync.h"
  41 #include "blender/blender_session.h"
  42 #include "blender/blender_util.h"
  43
  44 CCL_NAMESPACE_BEGIN
  45
  46 bool BlenderSession::headless = false;
  47 int BlenderSession::num_resumable_chunks = 0;
  48 int BlenderSession::current_resumable_chunk = 0;
  49 int BlenderSession::start_resumable_chunk = 0;
  50 int BlenderSession::end_resumable_chunk = 0;
  51
  52 BlenderSession::BlenderSession(BL::RenderEngine& b_engine,
  53                                BL::UserPreferences& b_userpref,
  54                                BL::BlendData& b_data,
  55                                BL::Scene& b_scene)
  56 : b_engine(b_engine),
  57   b_userpref(b_userpref),
  58   b_data(b_data),
  59   b_render(b_engine.render()),
  60   b_scene(b_scene),
  61   b_v3d(PointerRNA_NULL),
  62   b_rv3d(PointerRNA_NULL),
  63   python_thread_state(NULL)
  64 {
  65         /* offline render */
  66
  67         width = render_resolution_x(b_render);
  68         height = render_resolution_y(b_render);
  69
  70         background = true;
  71         last_redraw_time = 0.0;
  72         start_resize_time = 0.0;
  73         last_status_time = 0.0;
  74 }
  75
  76 BlenderSession::BlenderSession(BL::RenderEngine& b_engine,
  77                                BL::UserPreferences& b_userpref,
  78                                BL::BlendData& b_data,
  79                                BL::Scene& b_scene,
  80                                BL::SpaceView3D& b_v3d,
  81                                BL::RegionView3D& b_rv3d,
  82                                int width, int height)
  83 : b_engine(b_engine),
  84   b_userpref(b_userpref),
  85   b_data(b_data),
  86   b_render(b_scene.render()),
  87   b_scene(b_scene),
  88   b_v3d(b_v3d),
  89   b_rv3d(b_rv3d),
  90   width(width),
  91   height(height),
  92   python_thread_state(NULL)
  93 {
  94         /* 3d view render */
  95
  96         background = false;
  97         last_redraw_time = 0.0;
  98         start_resize_time = 0.0;
  99         last_status_time = 0.0;
 100 }
 101
 102 BlenderSession::~BlenderSession()
 103 {
 104         free_session();
 105 }
 106
 107 void BlenderSession::create()
 108 {
 109         create_session();
 110
 111         if(b_v3d)
 112                 session->start();
 113 }
 114
 115 void BlenderSession::create_session()
 116 {
 117         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
 118         SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
 119         bool session_pause = BlenderSync::get_session_pause(b_scene, background);
 120
 121         /* reset status/progress */
 122         last_status = "";
 123         last_error = "";
 124         last_progress = -1.0f;
 125         start_resize_time = 0.0;
 126
 127         /* create session */
 128         session = new Session(session_params);
 129         session->scene = scene;
 130         session->progress.set_update_callback(function_bind(&BlenderSession::tag_redraw, this));
 131         session->progress.set_cancel_callback(function_bind(&BlenderSession::test_cancel, this));
 132         session->set_pause(session_pause);
 133
 134         /* create scene */
 135         scene = new Scene(scene_params, session->device);
 136
 137         /* setup callbacks for builtin image support */
 138         scene->image_manager->builtin_image_info_cb = function_bind(&BlenderSession::builtin_image_info, this, _1, _2, _3, _4, _5, _6, _7, _8);
 139         scene->image_manager->builtin_image_pixels_cb = function_bind(&BlenderSession::builtin_image_pixels, this, _1, _2, _3, _4, _5);
 140         scene->image_manager->builtin_image_float_pixels_cb = function_bind(&BlenderSession::builtin_image_float_pixels, this, _1, _2, _3, _4, _5);
 141
 142         session->scene = scene;
 143
 144         /* There is no single depsgraph to use for the entire render.
 145          * So we need to handle this differently.
 146          *
 147          * We could loop over the final render result render layers in pipeline and keep Cycles unaware of multiple layers,
 148          * or perhaps move syncing further down in the pipeline.
 149          */
 150         /* create sync */
 151         sync = new BlenderSync(b_engine, b_data, b_scene, scene, !background, session->progress);
 152         BL::Object b_camera_override(b_engine.camera_override());
 153         if(b_v3d) {
 154                 sync->sync_view(b_v3d, b_rv3d, width, height);
 155         }
 156         else {
 157                 sync->sync_camera(b_render, b_camera_override, width, height, "");
 158         }
 159
 160         /* set buffer parameters */
 161         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
 162         session->reset(buffer_params, session_params.samples);
 163
 164         b_engine.use_highlight_tiles(session_params.progressive_refine == false);
 165
 166         update_resumable_tile_manager(session_params.samples);
 167 }
 168
 169 void BlenderSession::reset_session(BL::BlendData& b_data_, BL::Scene& b_scene_)
 170 {
 171         b_data = b_data_;
 172         b_render = b_engine.render();
 173         b_scene = b_scene_;
 174
 175         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
 176         SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
 177
 178         width = render_resolution_x(b_render);
 179         height = render_resolution_y(b_render);
 180
 181         if(scene->params.modified(scene_params) ||
 182            session->params.modified(session_params) ||
 183            !scene_params.persistent_data)
 184         {
 185                 /* if scene or session parameters changed, it's easier to simply re-create
 186                  * them rather than trying to distinguish which settings need to be updated
 187                  */
 188
 189                 delete session;
 190
 191                 create_session();
 192
 193                 return;
 194         }
 195
 196         session->progress.reset();
 197         scene->reset();
 198
 199         session->tile_manager.set_tile_order(session_params.tile_order);
 200
 201         /* peak memory usage should show current render peak, not peak for all renders
 202          * made by this render session
 203          */
 204         session->stats.mem_peak = session->stats.mem_used;
 205
 206         /* There is no single depsgraph to use for the entire render.
 207          * See note on create_session().
 208          */
 209         /* sync object should be re-created */
 210         sync = new BlenderSync(b_engine, b_data, b_scene, scene, !background, session->progress);
 211
 212         BL::SpaceView3D b_null_space_view3d(PointerRNA_NULL);
 213         BL::RegionView3D b_null_region_view3d(PointerRNA_NULL);
 214         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render,
 215                                                                     b_null_space_view3d,
 216                                                                     b_null_region_view3d,
 217                                                                     scene->camera,
 218                                                                     width, height);
 219         session->reset(buffer_params, session_params.samples);
 220
 221         b_engine.use_highlight_tiles(session_params.progressive_refine == false);
 222
 223         /* reset time */
 224         start_resize_time = 0.0;
 225 }
 226
 227 void BlenderSession::free_session()
 228 {
 229         if(sync)
 230                 delete sync;
 231
 232         delete session;
 233 }
 234
 235 static ShaderEvalType get_shader_type(const string& pass_type)
 236 {
 237         const char *shader_type = pass_type.c_str();
 238
 239         /* data passes */
 240         if(strcmp(shader_type, "NORMAL")==0)
 241                 return SHADER_EVAL_NORMAL;
 242         else if(strcmp(shader_type, "UV")==0)
 243                 return SHADER_EVAL_UV;
 244         else if(strcmp(shader_type, "DIFFUSE_COLOR")==0)
 245                 return SHADER_EVAL_DIFFUSE_COLOR;
 246         else if(strcmp(shader_type, "GLOSSY_COLOR")==0)
 247                 return SHADER_EVAL_GLOSSY_COLOR;
 248         else if(strcmp(shader_type, "TRANSMISSION_COLOR")==0)
 249                 return SHADER_EVAL_TRANSMISSION_COLOR;
 250         else if(strcmp(shader_type, "SUBSURFACE_COLOR")==0)
 251                 return SHADER_EVAL_SUBSURFACE_COLOR;
 252         else if(strcmp(shader_type, "EMIT")==0)
 253                 return SHADER_EVAL_EMISSION;
 254
 255         /* light passes */
 256         else if(strcmp(shader_type, "AO")==0)
 257                 return SHADER_EVAL_AO;
 258         else if(strcmp(shader_type, "COMBINED")==0)
 259                 return SHADER_EVAL_COMBINED;
 260         else if(strcmp(shader_type, "SHADOW")==0)
 261                 return SHADER_EVAL_SHADOW;
 262         else if(strcmp(shader_type, "DIFFUSE")==0)
 263                 return SHADER_EVAL_DIFFUSE;
 264         else if(strcmp(shader_type, "GLOSSY")==0)
 265                 return SHADER_EVAL_GLOSSY;
 266         else if(strcmp(shader_type, "TRANSMISSION")==0)
 267                 return SHADER_EVAL_TRANSMISSION;
 268         else if(strcmp(shader_type, "SUBSURFACE")==0)
 269                 return SHADER_EVAL_SUBSURFACE;
 270
 271         /* extra */
 272         else if(strcmp(shader_type, "ENVIRONMENT")==0)
 273                 return SHADER_EVAL_ENVIRONMENT;
 274
 275         else
 276                 return SHADER_EVAL_BAKE;
 277 }
 278
 279 static BL::RenderResult begin_render_result(BL::RenderEngine& b_engine,
 280                                             int x, int y,
 281                                             int w, int h,
 282                                             const char *layername,
 283                                             const char *viewname)
 284 {
 285         return b_engine.begin_result(x, y, w, h, layername, viewname);
 286 }
 287
 288 static void end_render_result(BL::RenderEngine& b_engine,
 289                               BL::RenderResult& b_rr,
 290                               bool cancel,
 291                               bool highlight,
 292                               bool do_merge_results)
 293 {
 294         b_engine.end_result(b_rr, (int)cancel, (int) highlight, (int)do_merge_results);
 295 }
 296
 297 void BlenderSession::do_write_update_render_tile(RenderTile& rtile, bool do_update_only, bool highlight)
 298 {
 299         int x = rtile.x - session->tile_manager.params.full_x;
 300         int y = rtile.y - session->tile_manager.params.full_y;
 301         int w = rtile.w;
 302         int h = rtile.h;
 303
 304         /* get render result */
 305         BL::RenderResult b_rr = begin_render_result(b_engine, x, y, w, h, b_rlay_name.c_str(), b_rview_name.c_str());
 306
 307         /* can happen if the intersected rectangle gives 0 width or height */
 308         if(b_rr.ptr.data == NULL) {
 309                 return;
 310         }
 311
 312         BL::RenderResult::layers_iterator b_single_rlay;
 313         b_rr.layers.begin(b_single_rlay);
 314
 315         /* layer will be missing if it was disabled in the UI */
 316         if(b_single_rlay == b_rr.layers.end())
 317                 return;
 318
 319         BL::RenderLayer b_rlay = *b_single_rlay;
 320
 321         if(do_update_only) {
 322                 /* Sample would be zero at initial tile update, which is only needed
 323                  * to tag tile form blender side as IN PROGRESS for proper highlight
 324                  * no buffers should be sent to blender yet. For denoise we also
 325                  * keep showing the noisy buffers until denoise is done. */
 326                 bool merge = (rtile.sample != 0) && (rtile.task != RenderTile::DENOISE);
 327
 328                 if(merge) {
 329                         update_render_result(b_rr, b_rlay, rtile);
 330                 }
 331
 332                 end_render_result(b_engine, b_rr, true, highlight, merge);
 333         }
 334         else {
 335                 /* Write final render result. */
 336                 write_render_result(b_rr, b_rlay, rtile);
 337                 end_render_result(b_engine, b_rr, false, false, true);
 338         }
 339 }
 340
 341 void BlenderSession::write_render_tile(RenderTile& rtile)
 342 {
 343         do_write_update_render_tile(rtile, false, false);
 344 }
 345
 346 void BlenderSession::update_render_tile(RenderTile& rtile, bool highlight)
 347 {
 348         /* use final write for preview renders, otherwise render result wouldn't be
 349          * be updated in blender side
 350          * would need to be investigated a bit further, but for now shall be fine
 351          */
 352         if(!b_engine.is_preview())
 353                 do_write_update_render_tile(rtile, true, highlight);
 354         else
 355                 do_write_update_render_tile(rtile, false, false);
 356 }
 357
 358 void BlenderSession::render(BL::Depsgraph& b_depsgraph)
 359 {
 360         /* set callback to write out render results */
 361         session->write_render_tile_cb = function_bind(&BlenderSession::write_render_tile, this, _1);
 362         session->update_render_tile_cb = function_bind(&BlenderSession::update_render_tile, this, _1, _2);
 363
 364         /* get buffer parameters */
 365         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
 366         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
 367
 368         /* render each layer */
 369         BL::ViewLayer b_view_layer = b_depsgraph.view_layer();
 370
 371         /* We do some special meta attributes when we only have single layer. */
 372         const bool is_single_layer = (b_scene.view_layers.length() == 1);
 373
 374         /* temporary render result to find needed passes and views */
 375         BL::RenderResult b_rr = begin_render_result(b_engine, 0, 0, 1, 1, b_view_layer.name().c_str(), NULL);
 376         BL::RenderResult::layers_iterator b_single_rlay;
 377         b_rr.layers.begin(b_single_rlay);
 378         BL::RenderLayer b_rlay = *b_single_rlay;
 379
 380         /* add passes */
 381         array<Pass> passes = sync->sync_render_passes(b_rlay, b_view_layer, session_params);
 382         buffer_params.passes = passes;
 383
 384         PointerRNA crl = RNA_pointer_get(&b_view_layer.ptr, "cycles");
 385         bool use_denoising = get_boolean(crl, "use_denoising");
 386         buffer_params.denoising_data_pass = use_denoising;
 387         session->tile_manager.schedule_denoising = use_denoising;
 388         session->params.use_denoising = use_denoising;
 389         scene->film->denoising_data_pass = buffer_params.denoising_data_pass;
 390         scene->film->denoising_flags = 0;
 391         if(!get_boolean(crl, "denoising_diffuse_direct"))        scene->film->denoising_flags |= DENOISING_CLEAN_DIFFUSE_DIR;
 392         if(!get_boolean(crl, "denoising_diffuse_indirect"))      scene->film->denoising_flags |= DENOISING_CLEAN_DIFFUSE_IND;
 393         if(!get_boolean(crl, "denoising_glossy_direct"))         scene->film->denoising_flags |= DENOISING_CLEAN_GLOSSY_DIR;
 394         if(!get_boolean(crl, "denoising_glossy_indirect"))       scene->film->denoising_flags |= DENOISING_CLEAN_GLOSSY_IND;
 395         if(!get_boolean(crl, "denoising_transmission_direct"))   scene->film->denoising_flags |= DENOISING_CLEAN_TRANSMISSION_DIR;
 396         if(!get_boolean(crl, "denoising_transmission_indirect")) scene->film->denoising_flags |= DENOISING_CLEAN_TRANSMISSION_IND;
 397         if(!get_boolean(crl, "denoising_subsurface_direct"))     scene->film->denoising_flags |= DENOISING_CLEAN_SUBSURFACE_DIR;
 398         if(!get_boolean(crl, "denoising_subsurface_indirect"))   scene->film->denoising_flags |= DENOISING_CLEAN_SUBSURFACE_IND;
 399         scene->film->denoising_clean_pass = (scene->film->denoising_flags & DENOISING_CLEAN_ALL_PASSES);
 400         buffer_params.denoising_clean_pass = scene->film->denoising_clean_pass;
 401         session->params.denoising_radius = get_int(crl, "denoising_radius");
 402         session->params.denoising_strength = get_float(crl, "denoising_strength");
 403         session->params.denoising_feature_strength = get_float(crl, "denoising_feature_strength");
 404         session->params.denoising_relative_pca = get_boolean(crl, "denoising_relative_pca");
 405
 406         scene->film->pass_alpha_threshold = b_view_layer.pass_alpha_threshold();
 407         scene->film->tag_passes_update(scene, passes);
 408         scene->film->tag_update(scene);
 409         scene->integrator->tag_update(scene);
 410
 411         BL::RenderResult::views_iterator b_view_iter;
 412         int view_index = 0;
 413         for(b_rr.views.begin(b_view_iter); b_view_iter != b_rr.views.end(); ++b_view_iter, ++view_index) {
 414                 b_rlay_name = b_view_layer.name();
 415                 b_rview_name = b_view_iter->name();
 416
 417                 /* set the current view */
 418                 b_engine.active_view_set(b_rview_name.c_str());
 419
 420                 /* update scene */
 421                 BL::Object b_camera_override(b_engine.camera_override());
 422                 sync->sync_camera(b_render, b_camera_override, width, height, b_rview_name.c_str());
 423                 sync->sync_data(b_render,
 424                                                 b_depsgraph,
 425                                                 b_v3d,
 426                                                 b_camera_override,
 427                                                 width, height,
 428                                                 &python_thread_state);
 429
 430                 /* Make sure all views have different noise patterns. - hardcoded value just to make it random */
 431                 if(view_index != 0) {
 432                         scene->integrator->seed += hash_int_2d(scene->integrator->seed, hash_int(view_index * 0xdeadbeef));
 433                         scene->integrator->tag_update(scene);
 434                 }
 435
 436                 /* Update number of samples per layer. */
 437                 int samples = sync->get_layer_samples();
 438                 bool bound_samples = sync->get_layer_bound_samples();
 439                 int effective_layer_samples;
 440
 441                 if(samples != 0 && (!bound_samples || (samples < session_params.samples)))
 442                         effective_layer_samples = samples;
 443                 else
 444                         effective_layer_samples = session_params.samples;
 445
 446                 /* Update tile manager if we're doing resumable render. */
 447                 update_resumable_tile_manager(effective_layer_samples);
 448
 449                 /* Update session itself. */
 450                 session->reset(buffer_params, effective_layer_samples);
 451
 452                 /* render */
 453                 session->start();
 454                 session->wait();
 455
 456                 if(session->progress.get_cancel())
 457                         break;
 458         }
 459
 460         if(is_single_layer) {
 461                 BL::RenderResult b_rr = b_engine.get_result();
 462                 string num_aa_samples = string_printf("%d", session->params.samples);
 463                 b_rr.stamp_data_add_field("Cycles Samples", num_aa_samples.c_str());
 464                 /* TODO(sergey): Report whether we're doing resumable render
 465                  * and also start/end sample if so.
 466                  */
 467         }
 468
 469         /* free result without merging */
 470         end_render_result(b_engine, b_rr, true, true, false);
 471
 472         double total_time, render_time;
 473         session->progress.get_time(total_time, render_time);
 474         VLOG(1) << "Total render time: " << total_time;
 475         VLOG(1) << "Render time (without synchronization): " << render_time;
 476
 477         /* clear callback */
 478         session->write_render_tile_cb = function_null;
 479         session->update_render_tile_cb = function_null;
 480
 481         /* TODO: find a way to clear this data for persistent data render */
 482 #if 0
 483         /* free all memory used (host and device), so we wouldn't leave render
 484          * engine with extra memory allocated
 485          */
 486
 487         session->device_free();
 488
 489         delete sync;
 490         sync = NULL;
 491 #endif
 492 }
 493
 494 static void populate_bake_data(BakeData *data, const
 495                                int object_id,
 496                                BL::BakePixel& pixel_array,
 497                                const int num_pixels)
 498 {
 499         BL::BakePixel bp = pixel_array;
 500
 501         int i;
 502         for(i = 0; i < num_pixels; i++) {
 503                 if(bp.object_id() == object_id) {
 504                         data->set(i, bp.primitive_id(), bp.uv(), bp.du_dx(), bp.du_dy(), bp.dv_dx(), bp.dv_dy());
 505                 } else {
 506                         data->set_null(i);
 507                 }
 508                 bp = bp.next();
 509         }
 510 }
 511
 512 static int bake_pass_filter_get(const int pass_filter)
 513 {
 514         int flag = BAKE_FILTER_NONE;
 515
 516         if((pass_filter & BL::BakeSettings::pass_filter_DIRECT) != 0)
 517                 flag |= BAKE_FILTER_DIRECT;
 518         if((pass_filter & BL::BakeSettings::pass_filter_INDIRECT) != 0)
 519                 flag |= BAKE_FILTER_INDIRECT;
 520         if((pass_filter & BL::BakeSettings::pass_filter_COLOR) != 0)
 521                 flag |= BAKE_FILTER_COLOR;
 522
 523         if((pass_filter & BL::BakeSettings::pass_filter_DIFFUSE) != 0)
 524                 flag |= BAKE_FILTER_DIFFUSE;
 525         if((pass_filter & BL::BakeSettings::pass_filter_GLOSSY) != 0)
 526                 flag |= BAKE_FILTER_GLOSSY;
 527         if((pass_filter & BL::BakeSettings::pass_filter_TRANSMISSION) != 0)
 528                 flag |= BAKE_FILTER_TRANSMISSION;
 529         if((pass_filter & BL::BakeSettings::pass_filter_SUBSURFACE) != 0)
 530                 flag |= BAKE_FILTER_SUBSURFACE;
 531
 532         if((pass_filter & BL::BakeSettings::pass_filter_EMIT) != 0)
 533                 flag |= BAKE_FILTER_EMISSION;
 534         if((pass_filter & BL::BakeSettings::pass_filter_AO) != 0)
 535                 flag |= BAKE_FILTER_AO;
 536
 537         return flag;
 538 }
 539
 540 void BlenderSession::bake(BL::Depsgraph& b_depsgraph,
 541                           BL::Object& b_object,
 542                           const string& pass_type,
 543                           const int pass_filter,
 544                           const int object_id,
 545                           BL::BakePixel& pixel_array,
 546                           const size_t num_pixels,
 547                           const int /*depth*/,
 548                           float result[])
 549 {
 550         ShaderEvalType shader_type = get_shader_type(pass_type);
 551
 552         /* Set baking flag in advance, so kernel loading can check if we need
 553          * any baking capabilities.
 554          */
 555         scene->bake_manager->set_baking(true);
 556
 557         /* ensure kernels are loaded before we do any scene updates */
 558         session->load_kernels();
 559
 560         if(shader_type == SHADER_EVAL_UV) {
 561                 /* force UV to be available */
 562                 Pass::add(PASS_UV, scene->film->passes);
 563         }
 564
 565         int bake_pass_filter = bake_pass_filter_get(pass_filter);
 566         bake_pass_filter = BakeManager::shader_type_to_pass_filter(shader_type, bake_pass_filter);
 567
 568         /* force use_light_pass to be true if we bake more than just colors */
 569         if(bake_pass_filter & ~BAKE_FILTER_COLOR) {
 570                 Pass::add(PASS_LIGHT, scene->film->passes);
 571         }
 572
 573         /* create device and update scene */
 574         scene->film->tag_update(scene);
 575         scene->integrator->tag_update(scene);
 576
 577         if(!session->progress.get_cancel()) {
 578                 /* update scene */
 579                 BL::Object b_camera_override(b_engine.camera_override());
 580                 sync->sync_camera(b_render, b_camera_override, width, height, "");
 581                 sync->sync_data(b_render,
 582                                                 b_depsgraph,
 583                                                 b_v3d,
 584                                                 b_camera_override,
 585                                                 width, height,
 586                                                 &python_thread_state);
 587         }
 588
 589         BakeData *bake_data = NULL;
 590
 591         if(!session->progress.get_cancel()) {
 592                 /* get buffer parameters */
 593                 SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
 594                 BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
 595
 596                 scene->bake_manager->set_shader_limit((size_t)b_engine.tile_x(), (size_t)b_engine.tile_y());
 597
 598                 /* set number of samples */
 599                 session->tile_manager.set_samples(session_params.samples);
 600                 session->reset(buffer_params, session_params.samples);
 601                 session->update_scene();
 602
 603                 /* find object index. todo: is arbitrary - copied from mesh_displace.cpp */
 604                 size_t object_index = OBJECT_NONE;
 605                 int tri_offset = 0;
 606
 607                 for(size_t i = 0; i < scene->objects.size(); i++) {
 608                         if(strcmp(scene->objects[i]->name.c_str(), b_object.name().c_str()) == 0) {
 609                                 object_index = i;
 610                                 tri_offset = scene->objects[i]->mesh->tri_offset;
 611                                 break;
 612                         }
 613                 }
 614
 615                 int object = object_index;
 616
 617                 bake_data = scene->bake_manager->init(object, tri_offset, num_pixels);
 618                 populate_bake_data(bake_data, object_id, pixel_array, num_pixels);
 619
 620                 /* set number of samples */
 621                 session->tile_manager.set_samples(session_params.samples);
 622                 session->reset(buffer_params, session_params.samples);
 623                 session->update_scene();
 624
 625                 session->progress.set_update_callback(function_bind(&BlenderSession::update_bake_progress, this));
 626         }
 627
 628         /* Perform bake. Check cancel to avoid crash with incomplete scene data. */
 629         if(!session->progress.get_cancel()) {
 630                 scene->bake_manager->bake(scene->device, &scene->dscene, scene, session->progress, shader_type, bake_pass_filter, bake_data, result);
 631         }
 632
 633         /* free all memory used (host and device), so we wouldn't leave render
 634          * engine with extra memory allocated
 635          */
 636
 637         session->device_free();
 638
 639         delete sync;
 640         sync = NULL;
 641 }
 642
 643 void BlenderSession::do_write_update_render_result(BL::RenderResult& b_rr,
 644                                                    BL::RenderLayer& b_rlay,
 645                                                    RenderTile& rtile,
 646                                                    bool do_update_only)
 647 {
 648         RenderBuffers *buffers = rtile.buffers;
 649
 650         /* copy data from device */
 651         if(!buffers->copy_from_device())
 652                 return;
 653
 654         float exposure = scene->film->exposure;
 655
 656         vector<float> pixels(rtile.w*rtile.h*4);
 657
 658         /* Adjust absolute sample number to the range. */
 659         int sample = rtile.sample;
 660         const int range_start_sample = session->tile_manager.range_start_sample;
 661         if(range_start_sample != -1) {
 662                 sample -= range_start_sample;
 663         }
 664
 665         if(!do_update_only) {
 666                 /* copy each pass */
 667                 BL::RenderLayer::passes_iterator b_iter;
 668
 669                 for(b_rlay.passes.begin(b_iter); b_iter != b_rlay.passes.end(); ++b_iter) {
 670                         BL::RenderPass b_pass(*b_iter);
 671
 672                         /* find matching pass type */
 673                         PassType pass_type = BlenderSync::get_pass_type(b_pass);
 674                         int components = b_pass.channels();
 675
 676                         bool read = false;
 677                         if(pass_type != PASS_NONE) {
 678                                 /* copy pixels */
 679                                 read = buffers->get_pass_rect(pass_type, exposure, sample, components, &pixels[0]);
 680                         }
 681                         else {
 682                                 int denoising_offset = BlenderSync::get_denoising_pass(b_pass);
 683                                 if(denoising_offset >= 0) {
 684                                         read = buffers->get_denoising_pass_rect(denoising_offset, exposure, sample, components, &pixels[0]);
 685                                 }
 686                         }
 687
 688                         if(!read) {
 689                                 memset(&pixels[0], 0, pixels.size()*sizeof(float));
 690                         }
 691
 692                         b_pass.rect(&pixels[0]);
 693                 }
 694         }
 695         else {
 696                 /* copy combined pass */
 697                 BL::RenderPass b_combined_pass(b_rlay.passes.find_by_name("Combined", b_rview_name.c_str()));
 698                 if(buffers->get_pass_rect(PASS_COMBINED, exposure, sample, 4, &pixels[0]))
 699                         b_combined_pass.rect(&pixels[0]);
 700         }
 701
 702         /* tag result as updated */
 703         b_engine.update_result(b_rr);
 704 }
 705
 706 void BlenderSession::write_render_result(BL::RenderResult& b_rr,
 707                                          BL::RenderLayer& b_rlay,
 708                                          RenderTile& rtile)
 709 {
 710         do_write_update_render_result(b_rr, b_rlay, rtile, false);
 711 }
 712
 713 void BlenderSession::update_render_result(BL::RenderResult& b_rr,
 714                                           BL::RenderLayer& b_rlay,
 715                                           RenderTile& rtile)
 716 {
 717         do_write_update_render_result(b_rr, b_rlay, rtile, true);
 718 }
 719
 720 void BlenderSession::synchronize(BL::Depsgraph& b_depsgraph)
 721 {
 722         /* only used for viewport render */
 723         if(!b_v3d)
 724                 return;
 725
 726         /* on session/scene parameter changes, we recreate session entirely */
 727         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
 728         SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
 729         bool session_pause = BlenderSync::get_session_pause(b_scene, background);
 730
 731         if(session->params.modified(session_params) ||
 732            scene->params.modified(scene_params))
 733         {
 734                 free_session();
 735                 create_session();
 736                 session->start();
 737                 return;
 738         }
 739
 740         /* increase samples, but never decrease */
 741         session->set_samples(session_params.samples);
 742         session->set_pause(session_pause);
 743
 744         /* copy recalc flags, outside of mutex so we can decide to do the real
 745          * synchronization at a later time to not block on running updates */
 746         sync->sync_recalc();
 747
 748         /* don't do synchronization if on pause */
 749         if(session_pause) {
 750                 tag_update();
 751                 return;
 752         }
 753
 754         /* try to acquire mutex. if we don't want to or can't, come back later */
 755         if(!session->ready_to_reset() || !session->scene->mutex.try_lock()) {
 756                 tag_update();
 757                 return;
 758         }
 759
 760         /* data and camera synchronize */
 761         BL::Object b_camera_override(b_engine.camera_override());
 762         sync->sync_data(b_render,
 763                         b_depsgraph,
 764                         b_v3d,
 765                         b_camera_override,
 766                         width, height,
 767                         &python_thread_state);
 768
 769         if(b_rv3d)
 770                 sync->sync_view(b_v3d, b_rv3d, width, height);
 771         else
 772                 sync->sync_camera(b_render, b_camera_override, width, height, "");
 773
 774         /* unlock */
 775         session->scene->mutex.unlock();
 776
 777         /* reset if needed */
 778         if(scene->need_reset()) {
 779                 BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
 780                 session->reset(buffer_params, session_params.samples);
 781
 782                 /* reset time */
 783                 start_resize_time = 0.0;
 784         }
 785 }
 786
 787 bool BlenderSession::draw(int w, int h)
 788 {
 789         /* pause in redraw in case update is not being called due to final render */
 790         session->set_pause(BlenderSync::get_session_pause(b_scene, background));
 791
 792         /* before drawing, we verify camera and viewport size changes, because
 793          * we do not get update callbacks for those, we must detect them here */
 794         if(session->ready_to_reset()) {
 795                 bool reset = false;
 796
 797                 /* if dimensions changed, reset */
 798                 if(width != w || height != h) {
 799                         if(start_resize_time == 0.0) {
 800                                 /* don't react immediately to resizes to avoid flickery resizing
 801                                  * of the viewport, and some window managers changing the window
 802                                  * size temporarily on unminimize */
 803                                 start_resize_time = time_dt();
 804                                 tag_redraw();
 805                         }
 806                         else if(time_dt() - start_resize_time < 0.2) {
 807                                 tag_redraw();
 808                         }
 809                         else {
 810                                 width = w;
 811                                 height = h;
 812                                 reset = true;
 813                         }
 814                 }
 815
 816                 /* try to acquire mutex. if we can't, come back later */
 817                 if(!session->scene->mutex.try_lock()) {
 818                         tag_update();
 819                 }
 820                 else {
 821                         /* update camera from 3d view */
 822
 823                         sync->sync_view(b_v3d, b_rv3d, width, height);
 824
 825                         if(scene->camera->need_update)
 826                                 reset = true;
 827
 828                         session->scene->mutex.unlock();
 829                 }
 830
 831                 /* reset if requested */
 832                 if(reset) {
 833                         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
 834                         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
 835                         bool session_pause = BlenderSync::get_session_pause(b_scene, background);
 836
 837                         if(session_pause == false) {
 838                                 session->reset(buffer_params, session_params.samples);
 839                                 start_resize_time = 0.0;
 840                         }
 841                 }
 842         }
 843         else {
 844                 tag_update();
 845         }
 846
 847         /* update status and progress for 3d view draw */
 848         update_status_progress();
 849
 850         /* draw */
 851         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
 852         DeviceDrawParams draw_params;
 853
 854         if(session->params.display_buffer_linear) {
 855                 draw_params.bind_display_space_shader_cb = function_bind(&BL::RenderEngine::bind_display_space_shader, &b_engine, b_scene);
 856                 draw_params.unbind_display_space_shader_cb = function_bind(&BL::RenderEngine::unbind_display_space_shader, &b_engine);
 857         }
 858
 859         return !session->draw(buffer_params, draw_params);
 860 }
 861
 862 void BlenderSession::get_status(string& status, string& substatus)
 863 {
 864         session->progress.get_status(status, substatus);
 865 }
 866
 867 void BlenderSession::get_progress(float& progress, double& total_time, double& render_time)
 868 {
 869         session->progress.get_time(total_time, render_time);
 870         progress = session->progress.get_progress();
 871 }
 872
 873 void BlenderSession::update_bake_progress()
 874 {
 875         float progress = session->progress.get_progress();
 876
 877         if(progress != last_progress) {
 878                 b_engine.update_progress(progress);
 879                 last_progress = progress;
 880         }
 881 }
 882
 883 void BlenderSession::update_status_progress()
 884 {
 885         string timestatus, status, substatus;
 886         string scene = "";
 887         float progress;
 888         double total_time, remaining_time = 0, render_time;
 889         char time_str[128];
 890         float mem_used = (float)session->stats.mem_used / 1024.0f / 1024.0f;
 891         float mem_peak = (float)session->stats.mem_peak / 1024.0f / 1024.0f;
 892
 893         get_status(status, substatus);
 894         get_progress(progress, total_time, render_time);
 895
 896         if(progress > 0)
 897                 remaining_time = (1.0 - (double)progress) * (render_time / (double)progress);
 898
 899         if(background) {
 900                 scene += " | " + b_scene.name();
 901                 if(b_rlay_name != "")
 902                         scene += ", "  + b_rlay_name;
 903
 904                 if(b_rview_name != "")
 905                         scene += ", " + b_rview_name;
 906         }
 907         else {
 908                 BLI_timecode_string_from_time_simple(time_str, sizeof(time_str), total_time);
 909                 timestatus = "Time:" + string(time_str) + " | ";
 910         }
 911
 912         if(remaining_time > 0) {
 913                 BLI_timecode_string_from_time_simple(time_str, sizeof(time_str), remaining_time);
 914                 timestatus += "Remaining:" + string(time_str) + " | ";
 915         }
 916
 917         timestatus += string_printf("Mem:%.2fM, Peak:%.2fM", (double)mem_used, (double)mem_peak);
 918
 919         if(status.size() > 0)
 920                 status = " | " + status;
 921         if(substatus.size() > 0)
 922                 status += " | " + substatus;
 923
 924         double current_time = time_dt();
 925         /* When rendering in a window, redraw the status at least once per second to keep the elapsed and remaining time up-to-date.
 926          * For headless rendering, only report when something significant changes to keep the console output readable. */
 927         if(status != last_status || (!headless && (current_time - last_status_time) > 1.0)) {
 928                 b_engine.update_stats("", (timestatus + scene + status).c_str());
 929                 b_engine.update_memory_stats(mem_used, mem_peak);
 930                 last_status = status;
 931                 last_status_time = current_time;
 932         }
 933         if(progress != last_progress) {
 934                 b_engine.update_progress(progress);
 935                 last_progress = progress;
 936         }
 937
 938         if(session->progress.get_error()) {
 939                 string error = session->progress.get_error_message();
 940                 if(error != last_error) {
 941                         /* TODO(sergey): Currently C++ RNA API doesn't let us to
 942                          * use mnemonic name for the variable. Would be nice to
 943                          * have this figured out.
 944                          *
 945                          * For until then, 1 << 5 means RPT_ERROR.
 946                          */
 947                         b_engine.report(1 << 5, error.c_str());
 948                         b_engine.error_set(error.c_str());
 949                         last_error = error;
 950                 }
 951         }
 952 }
 953
 954 void BlenderSession::tag_update()
 955 {
 956         /* tell blender that we want to get another update callback */
 957         b_engine.tag_update();
 958 }
 959
 960 void BlenderSession::tag_redraw()
 961 {
 962         if(background) {
 963                 /* update stats and progress, only for background here because
 964                  * in 3d view we do it in draw for thread safety reasons */
 965                 update_status_progress();
 966
 967                 /* offline render, redraw if timeout passed */
 968                 if(time_dt() - last_redraw_time > 1.0) {
 969                         b_engine.tag_redraw();
 970                         last_redraw_time = time_dt();
 971                 }
 972         }
 973         else {
 974                 /* tell blender that we want to redraw */
 975                 b_engine.tag_redraw();
 976         }
 977 }
 978
 979 void BlenderSession::test_cancel()
 980 {
 981         /* test if we need to cancel rendering */
 982         if(background)
 983                 if(b_engine.test_break())
 984                         session->progress.set_cancel("Cancelled");
 985 }
 986
 987 /* builtin image file name is actually an image datablock name with
 988  * absolute sequence frame number concatenated via '@' character
 989  *
 990  * this function splits frame from builtin name
 991  */
 992 int BlenderSession::builtin_image_frame(const string &builtin_name)
 993 {
 994         int last = builtin_name.find_last_of('@');
 995         return atoi(builtin_name.substr(last + 1, builtin_name.size() - last - 1).c_str());
 996 }
 997
 998 void BlenderSession::builtin_image_info(const string &builtin_name,
 999                                         void *builtin_data,
1000                                         bool &is_float,
1001                                         int &width,
1002                                         int &height,
1003                                         int &depth,
1004                                         int &channels,
1005                                         bool& free_cache)
1006 {
1007         /* empty image */
1008         is_float = false;
1009         width = 1;
1010         height = 1;
1011         depth = 0;
1012         channels = 0;
1013         free_cache = false;
1014
1015         if(!builtin_data)
1016                 return;
1017
1018         /* recover ID pointer */
1019         PointerRNA ptr;
1020         RNA_id_pointer_create((ID*)builtin_data, &ptr);
1021         BL::ID b_id(ptr);
1022
1023         if(b_id.is_a(&RNA_Image)) {
1024                 /* image data */
1025                 BL::Image b_image(b_id);
1026
1027                 free_cache = !b_image.has_data();
1028                 is_float = b_image.is_float();
1029                 width = b_image.size()[0];
1030                 height = b_image.size()[1];
1031                 depth = 1;
1032                 channels = b_image.channels();
1033         }
1034         else if(b_id.is_a(&RNA_Object)) {
1035                 /* smoke volume data */
1036                 BL::Object b_ob(b_id);
1037                 BL::SmokeDomainSettings b_domain = object_smoke_domain_find(b_ob);
1038
1039                 is_float = true;
1040                 depth = 1;
1041                 channels = 1;
1042
1043                 if(!b_domain)
1044                         return;
1045
1046                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_DENSITY) ||
1047                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_FLAME) ||
1048                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT) ||
1049                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_TEMPERATURE))
1050                         channels = 1;
1051                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_COLOR))
1052                         channels = 4;
1053                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY))
1054                         channels = 3;
1055                 else
1056                         return;
1057
1058                 int3 resolution = get_int3(b_domain.domain_resolution());
1059                 int amplify = (b_domain.use_high_resolution())? b_domain.amplify() + 1: 1;
1060
1061                 /* Velocity and heat data is always low-resolution. */
1062                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY) ||
1063                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT))
1064                 {
1065                         amplify = 1;
1066                 }
1067
1068                 width = resolution.x * amplify;
1069                 height = resolution.y * amplify;
1070                 depth = resolution.z * amplify;
1071         }
1072         else {
1073                 /* TODO(sergey): Check we're indeed in shader node tree. */
1074                 PointerRNA ptr;
1075                 RNA_pointer_create(NULL, &RNA_Node, builtin_data, &ptr);
1076                 BL::Node b_node(ptr);
1077                 if(b_node.is_a(&RNA_ShaderNodeTexPointDensity)) {
1078                         BL::ShaderNodeTexPointDensity b_point_density_node(b_node);
1079                         channels = 4;
1080                         width = height = depth = b_point_density_node.resolution();
1081                         is_float = true;
1082                 }
1083         }
1084 }
1085
1086 bool BlenderSession::builtin_image_pixels(const string &builtin_name,
1087                                           void *builtin_data,
1088                                           unsigned char *pixels,
1089                                           const size_t pixels_size,
1090                                           const bool free_cache)
1091 {
1092         if(!builtin_data) {
1093                 return false;
1094         }
1095
1096         const int frame = builtin_image_frame(builtin_name);
1097
1098         PointerRNA ptr;
1099         RNA_id_pointer_create((ID*)builtin_data, &ptr);
1100         BL::Image b_image(ptr);
1101
1102         const int width = b_image.size()[0];
1103         const int height = b_image.size()[1];
1104         const int channels = b_image.channels();
1105
1106         unsigned char *image_pixels = image_get_pixels_for_frame(b_image, frame);
1107         const size_t num_pixels = ((size_t)width) * height;
1108
1109         if(image_pixels && num_pixels * channels == pixels_size) {
1110                 memcpy(pixels, image_pixels, pixels_size * sizeof(unsigned char));
1111         }
1112         else {
1113                 if(channels == 1) {
1114                         memset(pixels, 0, pixels_size * sizeof(unsigned char));
1115                 }
1116                 else {
1117                         const size_t num_pixels_safe = pixels_size / channels;
1118                         unsigned char *cp = pixels;
1119                         for(size_t i = 0; i < num_pixels_safe; i++, cp += channels) {
1120                                 cp[0] = 255;
1121                                 cp[1] = 0;
1122                                 cp[2] = 255;
1123                                 if(channels == 4) {
1124                                         cp[3] = 255;
1125                                 }
1126                         }
1127                 }
1128         }
1129
1130         if(image_pixels) {
1131                 MEM_freeN(image_pixels);
1132         }
1133
1134         /* Free image buffers to save memory during render. */
1135         if(free_cache) {
1136                 b_image.buffers_free();
1137         }
1138
1139         /* Premultiply, byte images are always straight for Blender. */
1140         unsigned char *cp = pixels;
1141         for(size_t i = 0; i < num_pixels; i++, cp += channels) {
1142                 cp[0] = (cp[0] * cp[3]) >> 8;
1143                 cp[1] = (cp[1] * cp[3]) >> 8;
1144                 cp[2] = (cp[2] * cp[3]) >> 8;
1145         }
1146         return true;
1147 }
1148
1149 bool BlenderSession::builtin_image_float_pixels(const string &builtin_name,
1150                                                 void *builtin_data,
1151                                                 float *pixels,
1152                                                 const size_t pixels_size,
1153                                                 const bool free_cache)
1154 {
1155         if(!builtin_data) {
1156                 return false;
1157         }
1158
1159         PointerRNA ptr;
1160         RNA_id_pointer_create((ID*)builtin_data, &ptr);
1161         BL::ID b_id(ptr);
1162
1163         if(b_id.is_a(&RNA_Image)) {
1164                 /* image data */
1165                 BL::Image b_image(b_id);
1166                 int frame = builtin_image_frame(builtin_name);
1167
1168                 const int width = b_image.size()[0];
1169                 const int height = b_image.size()[1];
1170                 const int channels = b_image.channels();
1171
1172                 float *image_pixels;
1173                 image_pixels = image_get_float_pixels_for_frame(b_image, frame);
1174                 const size_t num_pixels = ((size_t)width) * height;
1175
1176                 if(image_pixels && num_pixels * channels == pixels_size) {
1177                         memcpy(pixels, image_pixels, pixels_size * sizeof(float));
1178                 }
1179                 else {
1180                         if(channels == 1) {
1181                                 memset(pixels, 0, num_pixels * sizeof(float));
1182                         }
1183                         else {
1184                                 const size_t num_pixels_safe = pixels_size / channels;
1185                                 float *fp = pixels;
1186                                 for(int i = 0; i < num_pixels_safe; i++, fp += channels) {
1187                                         fp[0] = 1.0f;
1188                                         fp[1] = 0.0f;
1189                                         fp[2] = 1.0f;
1190                                         if(channels == 4) {
1191                                                 fp[3] = 1.0f;
1192                                         }
1193                                 }
1194                         }
1195                 }
1196
1197                 if(image_pixels) {
1198                         MEM_freeN(image_pixels);
1199                 }
1200
1201                 /* Free image buffers to save memory during render. */
1202                 if(free_cache) {
1203                         b_image.buffers_free();
1204                 }
1205
1206                 return true;
1207         }
1208         else if(b_id.is_a(&RNA_Object)) {
1209                 /* smoke volume data */
1210                 BL::Object b_ob(b_id);
1211                 BL::SmokeDomainSettings b_domain = object_smoke_domain_find(b_ob);
1212
1213                 if(!b_domain) {
1214                         return false;
1215                 }
1216
1217                 int3 resolution = get_int3(b_domain.domain_resolution());
1218                 int length, amplify = (b_domain.use_high_resolution())? b_domain.amplify() + 1: 1;
1219
1220                 /* Velocity and heat data is always low-resolution. */
1221                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY) ||
1222                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT))
1223                 {
1224                         amplify = 1;
1225                 }
1226
1227                 const int width = resolution.x * amplify;
1228                 const int height = resolution.y * amplify;
1229                 const int depth = resolution.z * amplify;
1230                 const size_t num_pixels = ((size_t)width) * height * depth;
1231
1232                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_DENSITY)) {
1233                         SmokeDomainSettings_density_grid_get_length(&b_domain.ptr, &length);
1234                         if(length == num_pixels) {
1235                                 SmokeDomainSettings_density_grid_get(&b_domain.ptr, pixels);
1236                                 return true;
1237                         }
1238                 }
1239                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_FLAME)) {
1240                         /* this is in range 0..1, and interpreted by the OpenGL smoke viewer
1241                          * as 1500..3000 K with the first part faded to zero density */
1242                         SmokeDomainSettings_flame_grid_get_length(&b_domain.ptr, &length);
1243                         if(length == num_pixels) {
1244                                 SmokeDomainSettings_flame_grid_get(&b_domain.ptr, pixels);
1245                                 return true;
1246                         }
1247                 }
1248                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_COLOR)) {
1249                         /* the RGB is "premultiplied" by density for better interpolation results */
1250                         SmokeDomainSettings_color_grid_get_length(&b_domain.ptr, &length);
1251                         if(length == num_pixels*4) {
1252                                 SmokeDomainSettings_color_grid_get(&b_domain.ptr, pixels);
1253                                 return true;
1254                         }
1255                 }
1256                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY)) {
1257                         SmokeDomainSettings_velocity_grid_get_length(&b_domain.ptr, &length);
1258                         if(length == num_pixels*3) {
1259                                 SmokeDomainSettings_velocity_grid_get(&b_domain.ptr, pixels);
1260                                 return true;
1261                         }
1262                 }
1263                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT)) {
1264                         SmokeDomainSettings_heat_grid_get_length(&b_domain.ptr, &length);
1265                         if(length == num_pixels) {
1266                                 SmokeDomainSettings_heat_grid_get(&b_domain.ptr, pixels);
1267                                 return true;
1268                         }
1269                 }
1270                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_TEMPERATURE)) {
1271                         SmokeDomainSettings_temperature_grid_get_length(&b_domain.ptr, &length);
1272                         if(length == num_pixels) {
1273                                 SmokeDomainSettings_temperature_grid_get(&b_domain.ptr, pixels);
1274                                 return true;
1275                         }
1276                 }
1277                 else {
1278                         fprintf(stderr,
1279                                 "Cycles error: unknown volume attribute %s, skipping\n",
1280                                 builtin_name.c_str());
1281                         pixels[0] = 0.0f;
1282                         return false;
1283                 }
1284
1285                 fprintf(stderr, "Cycles error: unexpected smoke volume resolution, skipping\n");
1286         }
1287         else {
1288                 /* TODO: fix point density to work with new view layer depsgraph */
1289 #if 0
1290                 /* We originally were passing view_layer here but in reality we need a whole EvaluationContext
1291                  * in the RE_point_density_minmax() function.
1292                  * Note: There is not a single EvaluationContext for the entire render. They are per RenderLayer now.
1293                  */
1294                 /* TODO(sergey): Check we're indeed in shader node tree. */
1295                 PointerRNA ptr;
1296                 RNA_pointer_create(NULL, &RNA_Node, builtin_data, &ptr);
1297                 BL::Node b_node(ptr);
1298                 if(b_node.is_a(&RNA_ShaderNodeTexPointDensity)) {
1299                         BL::ShaderNodeTexPointDensity b_point_density_node(b_node);
1300                         int length;
1301                         int settings = background ? 1 : 0;  /* 1 - render settings, 0 - vewport settings. */
1302                         b_point_density_node.calc_point_density(b_scene, b_view_layer, settings, &length, &pixels);
1303                 }
1304 #endif
1305         }
1306
1307         return false;
1308 }
1309
1310 void BlenderSession::update_resumable_tile_manager(int num_samples)
1311 {
1312         const int num_resumable_chunks = BlenderSession::num_resumable_chunks,
1313                   current_resumable_chunk = BlenderSession::current_resumable_chunk;
1314         if(num_resumable_chunks == 0) {
1315                 return;
1316         }
1317
1318         const int num_samples_per_chunk = (int)ceilf((float)num_samples / num_resumable_chunks);
1319
1320         int range_start_sample, range_num_samples;
1321         if(current_resumable_chunk != 0) {
1322                 /* Single chunk rendering. */
1323                 range_start_sample = num_samples_per_chunk * (current_resumable_chunk - 1);
1324                 range_num_samples = num_samples_per_chunk;
1325         }
1326         else {
1327                 /* Ranged-chunks. */
1328                 const int num_chunks = end_resumable_chunk - start_resumable_chunk + 1;
1329                 range_start_sample = num_samples_per_chunk * (start_resumable_chunk - 1);
1330                 range_num_samples = num_chunks * num_samples_per_chunk;
1331         }
1332         /* Make sure we don't overshoot. */
1333         if(range_start_sample + range_num_samples > num_samples) {
1334                 range_num_samples = num_samples - range_num_samples;
1335         }
1336
1337         VLOG(1) << "Samples range start is " << range_start_sample << ", "
1338                 << "number of samples to render is " << range_num_samples;
1339
1340         scene->integrator->start_sample = range_start_sample;
1341         scene->integrator->tag_update(scene);
1342
1343         session->tile_manager.range_start_sample = range_start_sample;
1344         session->tile_manager.range_num_samples = range_num_samples;
1345 }
1346
1347 CCL_NAMESPACE_END