Merge branch 'master' into blender2.8
[blender.git] / 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 #include "render/stats.h"
32
33 #include "util/util_color.h"
34 #include "util/util_foreach.h"
35 #include "util/util_function.h"
36 #include "util/util_hash.h"
37 #include "util/util_logging.h"
38 #include "util/util_progress.h"
39 #include "util/util_time.h"
40
41 #include "blender/blender_sync.h"
42 #include "blender/blender_session.h"
43 #include "blender/blender_util.h"
44
45 CCL_NAMESPACE_BEGIN
46
47 bool BlenderSession::headless = false;
48 int BlenderSession::num_resumable_chunks = 0;
49 int BlenderSession::current_resumable_chunk = 0;
50 int BlenderSession::start_resumable_chunk = 0;
51 int BlenderSession::end_resumable_chunk = 0;
52 bool BlenderSession::print_render_stats = false;
53
54 BlenderSession::BlenderSession(BL::RenderEngine& b_engine,
55                                BL::UserPreferences& b_userpref,
56                                BL::BlendData& b_data,
57                                bool preview_osl)
58 : session(NULL),
59   sync(NULL),
60   b_engine(b_engine),
61   b_userpref(b_userpref),
62   b_data(b_data),
63   b_render(b_engine.render()),
64   b_depsgraph(PointerRNA_NULL),
65   b_scene(PointerRNA_NULL),
66   b_v3d(PointerRNA_NULL),
67   b_rv3d(PointerRNA_NULL),
68   width(0),
69   height(0),
70   preview_osl(preview_osl),
71   python_thread_state(NULL)
72 {
73         /* offline render */
74         background = true;
75         last_redraw_time = 0.0;
76         start_resize_time = 0.0;
77         last_status_time = 0.0;
78 }
79
80 BlenderSession::BlenderSession(BL::RenderEngine& b_engine,
81                                BL::UserPreferences& b_userpref,
82                                BL::BlendData& b_data,
83                                BL::SpaceView3D& b_v3d,
84                                BL::RegionView3D& b_rv3d,
85                                int width, int height)
86 : session(NULL),
87   sync(NULL),
88   b_engine(b_engine),
89   b_userpref(b_userpref),
90   b_data(b_data),
91   b_render(b_engine.render()),
92   b_depsgraph(PointerRNA_NULL),
93   b_scene(PointerRNA_NULL),
94   b_v3d(b_v3d),
95   b_rv3d(b_rv3d),
96   width(width),
97   height(height),
98   preview_osl(false),
99   python_thread_state(NULL)
100 {
101         /* 3d view render */
102         background = false;
103         last_redraw_time = 0.0;
104         start_resize_time = 0.0;
105         last_status_time = 0.0;
106 }
107
108 BlenderSession::~BlenderSession()
109 {
110         free_session();
111 }
112
113 void BlenderSession::create()
114 {
115         create_session();
116
117         if(b_v3d)
118                 session->start();
119 }
120
121 void BlenderSession::create_session()
122 {
123         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
124         SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
125         bool session_pause = BlenderSync::get_session_pause(b_scene, background);
126
127         /* reset status/progress */
128         last_status = "";
129         last_error = "";
130         last_progress = -1.0f;
131         start_resize_time = 0.0;
132
133         /* create session */
134         session = new Session(session_params);
135         session->scene = scene;
136         session->progress.set_update_callback(function_bind(&BlenderSession::tag_redraw, this));
137         session->progress.set_cancel_callback(function_bind(&BlenderSession::test_cancel, this));
138         session->set_pause(session_pause);
139
140         /* create scene */
141         scene = new Scene(scene_params, session->device);
142
143         /* setup callbacks for builtin image support */
144         scene->image_manager->builtin_image_info_cb = function_bind(&BlenderSession::builtin_image_info, this, _1, _2, _3);
145         scene->image_manager->builtin_image_pixels_cb = function_bind(&BlenderSession::builtin_image_pixels, this, _1, _2, _3, _4, _5);
146         scene->image_manager->builtin_image_float_pixels_cb = function_bind(&BlenderSession::builtin_image_float_pixels, this, _1, _2, _3, _4, _5);
147
148         session->scene = scene;
149
150         /* There is no single depsgraph to use for the entire render.
151          * So we need to handle this differently.
152          *
153          * We could loop over the final render result render layers in pipeline and keep Cycles unaware of multiple layers,
154          * or perhaps move syncing further down in the pipeline.
155          */
156         /* create sync */
157         sync = new BlenderSync(b_engine, b_data, b_scene, scene, !background, session->progress);
158         BL::Object b_camera_override(b_engine.camera_override());
159         if(b_v3d) {
160                 sync->sync_view(b_v3d, b_rv3d, width, height);
161         }
162         else {
163                 sync->sync_camera(b_render, b_camera_override, width, height, "");
164         }
165
166         /* set buffer parameters */
167         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
168         session->reset(buffer_params, session_params.samples);
169
170         b_engine.use_highlight_tiles(session_params.progressive_refine == false);
171
172         update_resumable_tile_manager(session_params.samples);
173 }
174
175 void BlenderSession::reset_session(BL::BlendData& b_data, BL::Depsgraph& b_depsgraph)
176 {
177         this->b_data = b_data;
178         this->b_depsgraph = b_depsgraph;
179         this->b_scene = b_depsgraph.scene_eval();
180
181         if (preview_osl) {
182                 PointerRNA cscene = RNA_pointer_get(&b_scene.ptr, "cycles");
183                 RNA_boolean_set(&cscene, "shading_system", preview_osl);
184         }
185
186         if (b_v3d) {
187                 this->b_render = b_scene.render();
188         }
189         else {
190                 this->b_render = b_engine.render();
191                 width = render_resolution_x(b_render);
192                 height = render_resolution_y(b_render);
193         }
194
195         if (session == NULL) {
196                 create();
197         }
198
199         if (b_v3d) {
200                 /* NOTE: We need to create session, but all the code from below
201                  * will make viewport render to stuck on initialization.
202                  */
203                 return;
204         }
205
206         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
207         SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
208
209         if(scene->params.modified(scene_params) ||
210            session->params.modified(session_params) ||
211            !scene_params.persistent_data)
212         {
213                 /* if scene or session parameters changed, it's easier to simply re-create
214                  * them rather than trying to distinguish which settings need to be updated
215                  */
216                 free_session();
217                 create_session();
218                 return;
219         }
220
221         session->progress.reset();
222         scene->reset();
223
224         session->tile_manager.set_tile_order(session_params.tile_order);
225
226         /* peak memory usage should show current render peak, not peak for all renders
227          * made by this render session
228          */
229         session->stats.mem_peak = session->stats.mem_used;
230
231         /* There is no single depsgraph to use for the entire render.
232          * See note on create_session().
233          */
234         /* sync object should be re-created */
235         sync = new BlenderSync(b_engine, b_data, b_scene, scene, !background, session->progress);
236
237         BL::SpaceView3D b_null_space_view3d(PointerRNA_NULL);
238         BL::RegionView3D b_null_region_view3d(PointerRNA_NULL);
239         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render,
240                                                                     b_null_space_view3d,
241                                                                     b_null_region_view3d,
242                                                                     scene->camera,
243                                                                     width, height);
244         session->reset(buffer_params, session_params.samples);
245
246         b_engine.use_highlight_tiles(session_params.progressive_refine == false);
247
248         /* reset time */
249         start_resize_time = 0.0;
250 }
251
252 void BlenderSession::free_session()
253 {
254         if(sync)
255                 delete sync;
256
257         delete session;
258 }
259
260 static ShaderEvalType get_shader_type(const string& pass_type)
261 {
262         const char *shader_type = pass_type.c_str();
263
264         /* data passes */
265         if(strcmp(shader_type, "NORMAL")==0)
266                 return SHADER_EVAL_NORMAL;
267         else if(strcmp(shader_type, "UV")==0)
268                 return SHADER_EVAL_UV;
269         else if(strcmp(shader_type, "ROUGHNESS")==0)
270                 return SHADER_EVAL_ROUGHNESS;
271         else if(strcmp(shader_type, "DIFFUSE_COLOR")==0)
272                 return SHADER_EVAL_DIFFUSE_COLOR;
273         else if(strcmp(shader_type, "GLOSSY_COLOR")==0)
274                 return SHADER_EVAL_GLOSSY_COLOR;
275         else if(strcmp(shader_type, "TRANSMISSION_COLOR")==0)
276                 return SHADER_EVAL_TRANSMISSION_COLOR;
277         else if(strcmp(shader_type, "SUBSURFACE_COLOR")==0)
278                 return SHADER_EVAL_SUBSURFACE_COLOR;
279         else if(strcmp(shader_type, "EMIT")==0)
280                 return SHADER_EVAL_EMISSION;
281
282         /* light passes */
283         else if(strcmp(shader_type, "AO")==0)
284                 return SHADER_EVAL_AO;
285         else if(strcmp(shader_type, "COMBINED")==0)
286                 return SHADER_EVAL_COMBINED;
287         else if(strcmp(shader_type, "SHADOW")==0)
288                 return SHADER_EVAL_SHADOW;
289         else if(strcmp(shader_type, "DIFFUSE")==0)
290                 return SHADER_EVAL_DIFFUSE;
291         else if(strcmp(shader_type, "GLOSSY")==0)
292                 return SHADER_EVAL_GLOSSY;
293         else if(strcmp(shader_type, "TRANSMISSION")==0)
294                 return SHADER_EVAL_TRANSMISSION;
295         else if(strcmp(shader_type, "SUBSURFACE")==0)
296                 return SHADER_EVAL_SUBSURFACE;
297
298         /* extra */
299         else if(strcmp(shader_type, "ENVIRONMENT")==0)
300                 return SHADER_EVAL_ENVIRONMENT;
301
302         else
303                 return SHADER_EVAL_BAKE;
304 }
305
306 static BL::RenderResult begin_render_result(BL::RenderEngine& b_engine,
307                                             int x, int y,
308                                             int w, int h,
309                                             const char *layername,
310                                             const char *viewname)
311 {
312         return b_engine.begin_result(x, y, w, h, layername, viewname);
313 }
314
315 static void end_render_result(BL::RenderEngine& b_engine,
316                               BL::RenderResult& b_rr,
317                               bool cancel,
318                               bool highlight,
319                               bool do_merge_results)
320 {
321         b_engine.end_result(b_rr, (int)cancel, (int) highlight, (int)do_merge_results);
322 }
323
324 void BlenderSession::do_write_update_render_tile(RenderTile& rtile, bool do_update_only, bool highlight)
325 {
326         int x = rtile.x - session->tile_manager.params.full_x;
327         int y = rtile.y - session->tile_manager.params.full_y;
328         int w = rtile.w;
329         int h = rtile.h;
330
331         /* get render result */
332         BL::RenderResult b_rr = begin_render_result(b_engine, x, y, w, h, b_rlay_name.c_str(), b_rview_name.c_str());
333
334         /* can happen if the intersected rectangle gives 0 width or height */
335         if(b_rr.ptr.data == NULL) {
336                 return;
337         }
338
339         BL::RenderResult::layers_iterator b_single_rlay;
340         b_rr.layers.begin(b_single_rlay);
341
342         /* layer will be missing if it was disabled in the UI */
343         if(b_single_rlay == b_rr.layers.end())
344                 return;
345
346         BL::RenderLayer b_rlay = *b_single_rlay;
347
348         if(do_update_only) {
349                 /* Sample would be zero at initial tile update, which is only needed
350                  * to tag tile form blender side as IN PROGRESS for proper highlight
351                  * no buffers should be sent to blender yet. For denoise we also
352                  * keep showing the noisy buffers until denoise is done. */
353                 bool merge = (rtile.sample != 0) && (rtile.task != RenderTile::DENOISE);
354
355                 if(merge) {
356                         update_render_result(b_rr, b_rlay, rtile);
357                 }
358
359                 end_render_result(b_engine, b_rr, true, highlight, merge);
360         }
361         else {
362                 /* Write final render result. */
363                 write_render_result(b_rr, b_rlay, rtile);
364                 end_render_result(b_engine, b_rr, false, false, true);
365         }
366 }
367
368 void BlenderSession::write_render_tile(RenderTile& rtile)
369 {
370         do_write_update_render_tile(rtile, false, false);
371 }
372
373 void BlenderSession::update_render_tile(RenderTile& rtile, bool highlight)
374 {
375         /* use final write for preview renders, otherwise render result wouldn't be
376          * be updated in blender side
377          * would need to be investigated a bit further, but for now shall be fine
378          */
379         if(!b_engine.is_preview())
380                 do_write_update_render_tile(rtile, true, highlight);
381         else
382                 do_write_update_render_tile(rtile, false, false);
383 }
384
385 void BlenderSession::render(BL::Depsgraph& b_depsgraph_)
386 {
387         b_depsgraph = b_depsgraph_;
388
389         /* set callback to write out render results */
390         session->write_render_tile_cb = function_bind(&BlenderSession::write_render_tile, this, _1);
391         session->update_render_tile_cb = function_bind(&BlenderSession::update_render_tile, this, _1, _2);
392
393         /* get buffer parameters */
394         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
395         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
396
397         /* render each layer */
398         BL::ViewLayer b_view_layer = b_depsgraph.view_layer_eval();
399
400         /* We do some special meta attributes when we only have single layer. */
401         const bool is_single_layer = (b_scene.view_layers.length() == 1);
402
403         /* temporary render result to find needed passes and views */
404         BL::RenderResult b_rr = begin_render_result(b_engine, 0, 0, 1, 1, b_view_layer.name().c_str(), NULL);
405         BL::RenderResult::layers_iterator b_single_rlay;
406         b_rr.layers.begin(b_single_rlay);
407         BL::RenderLayer b_rlay = *b_single_rlay;
408
409         /* add passes */
410         vector<Pass> passes = sync->sync_render_passes(b_rlay, b_view_layer, session_params);
411         buffer_params.passes = passes;
412
413         PointerRNA crl = RNA_pointer_get(&b_view_layer.ptr, "cycles");
414         bool use_denoising = get_boolean(crl, "use_denoising");
415         bool denoising_passes = use_denoising || get_boolean(crl, "denoising_store_passes");
416
417         session->tile_manager.schedule_denoising = use_denoising;
418         buffer_params.denoising_data_pass = denoising_passes;
419         buffer_params.denoising_clean_pass = (scene->film->denoising_flags & DENOISING_CLEAN_ALL_PASSES);
420
421         session->params.use_denoising = use_denoising;
422         session->params.denoising_passes = denoising_passes;
423         session->params.denoising_radius = get_int(crl, "denoising_radius");
424         session->params.denoising_strength = get_float(crl, "denoising_strength");
425         session->params.denoising_feature_strength = get_float(crl, "denoising_feature_strength");
426         session->params.denoising_relative_pca = get_boolean(crl, "denoising_relative_pca");
427
428         scene->film->denoising_data_pass = buffer_params.denoising_data_pass;
429         scene->film->denoising_clean_pass = buffer_params.denoising_clean_pass;
430         session->params.denoising_radius = get_int(crl, "denoising_radius");
431         session->params.denoising_strength = get_float(crl, "denoising_strength");
432         session->params.denoising_feature_strength = get_float(crl, "denoising_feature_strength");
433         session->params.denoising_relative_pca = get_boolean(crl, "denoising_relative_pca");
434
435         scene->film->pass_alpha_threshold = b_view_layer.pass_alpha_threshold();
436         scene->film->tag_passes_update(scene, passes);
437         scene->film->tag_update(scene);
438         scene->integrator->tag_update(scene);
439
440         BL::RenderResult::views_iterator b_view_iter;
441         int view_index = 0;
442         for(b_rr.views.begin(b_view_iter); b_view_iter != b_rr.views.end(); ++b_view_iter, ++view_index) {
443                 b_rlay_name = b_view_layer.name();
444                 b_rview_name = b_view_iter->name();
445
446                 /* set the current view */
447                 b_engine.active_view_set(b_rview_name.c_str());
448
449                 /* update scene */
450                 BL::Object b_camera_override(b_engine.camera_override());
451                 sync->sync_camera(b_render, b_camera_override, width, height, b_rview_name.c_str());
452                 sync->sync_data(b_render,
453                                 b_depsgraph,
454                                 b_v3d,
455                                 b_camera_override,
456                                 width, height,
457                                 &python_thread_state);
458                 builtin_images_load();
459
460                 /* Make sure all views have different noise patterns. - hardcoded value just to make it random */
461                 if(view_index != 0) {
462                         scene->integrator->seed += hash_int_2d(scene->integrator->seed, hash_int(view_index * 0xdeadbeef));
463                         scene->integrator->tag_update(scene);
464                 }
465
466                 int effective_layer_samples = session_params.samples;
467
468                 /* TODO: Update number of samples per layer. */
469 #if 0
470                 if(samples != 0 && (!bound_samples || (samples < session_params.samples)))
471                         effective_layer_samples = samples;
472 #endif
473
474                 /* Update tile manager if we're doing resumable render. */
475                 update_resumable_tile_manager(effective_layer_samples);
476
477                 /* Update session itself. */
478                 session->reset(buffer_params, effective_layer_samples);
479
480                 /* render */
481                 session->start();
482                 session->wait();
483
484                 if(!b_engine.is_preview() && background && print_render_stats) {
485                         RenderStats stats;
486                         session->scene->collect_statistics(&stats);
487                         printf("Render statistics:\n%s\n", stats.full_report().c_str());
488                 }
489
490                 if(session->progress.get_cancel())
491                         break;
492         }
493
494         if(is_single_layer) {
495                 BL::RenderResult b_rr = b_engine.get_result();
496                 string num_aa_samples = string_printf("%d", session->params.samples);
497                 b_rr.stamp_data_add_field("Cycles Samples", num_aa_samples.c_str());
498                 /* TODO(sergey): Report whether we're doing resumable render
499                  * and also start/end sample if so.
500                  */
501         }
502
503         /* free result without merging */
504         end_render_result(b_engine, b_rr, true, true, false);
505
506         double total_time, render_time;
507         session->progress.get_time(total_time, render_time);
508         VLOG(1) << "Total render time: " << total_time;
509         VLOG(1) << "Render time (without synchronization): " << render_time;
510
511         /* clear callback */
512         session->write_render_tile_cb = function_null;
513         session->update_render_tile_cb = function_null;
514
515         /* TODO: find a way to clear this data for persistent data render */
516 #if 0
517         /* free all memory used (host and device), so we wouldn't leave render
518          * engine with extra memory allocated
519          */
520
521         session->device_free();
522
523         delete sync;
524         sync = NULL;
525 #endif
526 }
527
528 static void populate_bake_data(BakeData *data, const
529                                int object_id,
530                                BL::BakePixel& pixel_array,
531                                const int num_pixels)
532 {
533         BL::BakePixel bp = pixel_array;
534
535         int i;
536         for(i = 0; i < num_pixels; i++) {
537                 if(bp.object_id() == object_id) {
538                         data->set(i, bp.primitive_id(), bp.uv(), bp.du_dx(), bp.du_dy(), bp.dv_dx(), bp.dv_dy());
539                 } else {
540                         data->set_null(i);
541                 }
542                 bp = bp.next();
543         }
544 }
545
546 static int bake_pass_filter_get(const int pass_filter)
547 {
548         int flag = BAKE_FILTER_NONE;
549
550         if((pass_filter & BL::BakeSettings::pass_filter_DIRECT) != 0)
551                 flag |= BAKE_FILTER_DIRECT;
552         if((pass_filter & BL::BakeSettings::pass_filter_INDIRECT) != 0)
553                 flag |= BAKE_FILTER_INDIRECT;
554         if((pass_filter & BL::BakeSettings::pass_filter_COLOR) != 0)
555                 flag |= BAKE_FILTER_COLOR;
556
557         if((pass_filter & BL::BakeSettings::pass_filter_DIFFUSE) != 0)
558                 flag |= BAKE_FILTER_DIFFUSE;
559         if((pass_filter & BL::BakeSettings::pass_filter_GLOSSY) != 0)
560                 flag |= BAKE_FILTER_GLOSSY;
561         if((pass_filter & BL::BakeSettings::pass_filter_TRANSMISSION) != 0)
562                 flag |= BAKE_FILTER_TRANSMISSION;
563         if((pass_filter & BL::BakeSettings::pass_filter_SUBSURFACE) != 0)
564                 flag |= BAKE_FILTER_SUBSURFACE;
565
566         if((pass_filter & BL::BakeSettings::pass_filter_EMIT) != 0)
567                 flag |= BAKE_FILTER_EMISSION;
568         if((pass_filter & BL::BakeSettings::pass_filter_AO) != 0)
569                 flag |= BAKE_FILTER_AO;
570
571         return flag;
572 }
573
574 void BlenderSession::bake(BL::Depsgraph& b_depsgraph_,
575                           BL::Object& b_object,
576                           const string& pass_type,
577                           const int pass_filter,
578                           const int object_id,
579                           BL::BakePixel& pixel_array,
580                           const size_t num_pixels,
581                           const int /*depth*/,
582                           float result[])
583 {
584         b_depsgraph = b_depsgraph_;
585
586         ShaderEvalType shader_type = get_shader_type(pass_type);
587
588         /* Set baking flag in advance, so kernel loading can check if we need
589          * any baking capabilities.
590          */
591         scene->bake_manager->set_baking(true);
592
593         /* ensure kernels are loaded before we do any scene updates */
594         session->load_kernels();
595
596         if(shader_type == SHADER_EVAL_UV) {
597                 /* force UV to be available */
598                 Pass::add(PASS_UV, scene->film->passes);
599         }
600
601         int bake_pass_filter = bake_pass_filter_get(pass_filter);
602         bake_pass_filter = BakeManager::shader_type_to_pass_filter(shader_type, bake_pass_filter);
603
604         /* force use_light_pass to be true if we bake more than just colors */
605         if(bake_pass_filter & ~BAKE_FILTER_COLOR) {
606                 Pass::add(PASS_LIGHT, scene->film->passes);
607         }
608
609         /* create device and update scene */
610         scene->film->tag_update(scene);
611         scene->integrator->tag_update(scene);
612
613         if(!session->progress.get_cancel()) {
614                 /* update scene */
615                 BL::Object b_camera_override(b_engine.camera_override());
616                 sync->sync_camera(b_render, b_camera_override, width, height, "");
617                 sync->sync_data(b_render,
618                                 b_depsgraph,
619                                 b_v3d,
620                                 b_camera_override,
621                                 width, height,
622                                 &python_thread_state);
623                 builtin_images_load();
624         }
625
626         BakeData *bake_data = NULL;
627
628         if(!session->progress.get_cancel()) {
629                 /* get buffer parameters */
630                 SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
631                 BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
632
633                 scene->bake_manager->set_shader_limit((size_t)b_engine.tile_x(), (size_t)b_engine.tile_y());
634
635                 /* set number of samples */
636                 session->tile_manager.set_samples(session_params.samples);
637                 session->reset(buffer_params, session_params.samples);
638                 session->update_scene();
639
640                 /* find object index. todo: is arbitrary - copied from mesh_displace.cpp */
641                 size_t object_index = OBJECT_NONE;
642                 int tri_offset = 0;
643
644                 for(size_t i = 0; i < scene->objects.size(); i++) {
645                         if(strcmp(scene->objects[i]->name.c_str(), b_object.name().c_str()) == 0) {
646                                 object_index = i;
647                                 tri_offset = scene->objects[i]->mesh->tri_offset;
648                                 break;
649                         }
650                 }
651
652                 int object = object_index;
653
654                 bake_data = scene->bake_manager->init(object, tri_offset, num_pixels);
655                 populate_bake_data(bake_data, object_id, pixel_array, num_pixels);
656
657                 /* set number of samples */
658                 session->tile_manager.set_samples(session_params.samples);
659                 session->reset(buffer_params, session_params.samples);
660                 session->update_scene();
661
662                 session->progress.set_update_callback(function_bind(&BlenderSession::update_bake_progress, this));
663         }
664
665         /* Perform bake. Check cancel to avoid crash with incomplete scene data. */
666         if(!session->progress.get_cancel()) {
667                 scene->bake_manager->bake(scene->device, &scene->dscene, scene, session->progress, shader_type, bake_pass_filter, bake_data, result);
668         }
669
670         /* free all memory used (host and device), so we wouldn't leave render
671          * engine with extra memory allocated
672          */
673
674         session->device_free();
675
676         delete sync;
677         sync = NULL;
678 }
679
680 void BlenderSession::do_write_update_render_result(BL::RenderResult& b_rr,
681                                                    BL::RenderLayer& b_rlay,
682                                                    RenderTile& rtile,
683                                                    bool do_update_only)
684 {
685         RenderBuffers *buffers = rtile.buffers;
686
687         /* copy data from device */
688         if(!buffers->copy_from_device())
689                 return;
690
691         float exposure = scene->film->exposure;
692
693         vector<float> pixels(rtile.w*rtile.h*4);
694
695         /* Adjust absolute sample number to the range. */
696         int sample = rtile.sample;
697         const int range_start_sample = session->tile_manager.range_start_sample;
698         if(range_start_sample != -1) {
699                 sample -= range_start_sample;
700         }
701
702         if(!do_update_only) {
703                 /* copy each pass */
704                 BL::RenderLayer::passes_iterator b_iter;
705
706                 for(b_rlay.passes.begin(b_iter); b_iter != b_rlay.passes.end(); ++b_iter) {
707                         BL::RenderPass b_pass(*b_iter);
708
709                         /* find matching pass type */
710                         PassType pass_type = BlenderSync::get_pass_type(b_pass);
711                         int components = b_pass.channels();
712
713                         bool read = false;
714                         if(pass_type != PASS_NONE) {
715                                 /* copy pixels */
716                                 read = buffers->get_pass_rect(pass_type, exposure, sample, components, &pixels[0], b_pass.name());
717                         }
718                         else {
719                                 int denoising_offset = BlenderSync::get_denoising_pass(b_pass);
720                                 if(denoising_offset >= 0) {
721                                         read = buffers->get_denoising_pass_rect(denoising_offset, exposure, sample, components, &pixels[0]);
722                                 }
723                         }
724
725                         if(!read) {
726                                 memset(&pixels[0], 0, pixels.size()*sizeof(float));
727                         }
728
729                         b_pass.rect(&pixels[0]);
730                 }
731         }
732         else {
733                 /* copy combined pass */
734                 BL::RenderPass b_combined_pass(b_rlay.passes.find_by_name("Combined", b_rview_name.c_str()));
735                 if(buffers->get_pass_rect(PASS_COMBINED, exposure, sample, 4, &pixels[0], "Combined"))
736                         b_combined_pass.rect(&pixels[0]);
737         }
738
739         /* tag result as updated */
740         b_engine.update_result(b_rr);
741 }
742
743 void BlenderSession::write_render_result(BL::RenderResult& b_rr,
744                                          BL::RenderLayer& b_rlay,
745                                          RenderTile& rtile)
746 {
747         do_write_update_render_result(b_rr, b_rlay, rtile, false);
748 }
749
750 void BlenderSession::update_render_result(BL::RenderResult& b_rr,
751                                           BL::RenderLayer& b_rlay,
752                                           RenderTile& rtile)
753 {
754         do_write_update_render_result(b_rr, b_rlay, rtile, true);
755 }
756
757 void BlenderSession::synchronize(BL::Depsgraph& b_depsgraph_)
758 {
759         /* only used for viewport render */
760         if(!b_v3d)
761                 return;
762
763         /* on session/scene parameter changes, we recreate session entirely */
764         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
765         SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
766         bool session_pause = BlenderSync::get_session_pause(b_scene, background);
767
768         if(session->params.modified(session_params) ||
769            scene->params.modified(scene_params))
770         {
771                 free_session();
772                 create_session();
773                 session->start();
774                 return;
775         }
776
777         /* increase samples, but never decrease */
778         session->set_samples(session_params.samples);
779         session->set_pause(session_pause);
780
781         /* copy recalc flags, outside of mutex so we can decide to do the real
782          * synchronization at a later time to not block on running updates */
783         sync->sync_recalc(b_depsgraph_);
784
785         /* don't do synchronization if on pause */
786         if(session_pause) {
787                 tag_update();
788                 return;
789         }
790
791         /* try to acquire mutex. if we don't want to or can't, come back later */
792         if(!session->ready_to_reset() || !session->scene->mutex.try_lock()) {
793                 tag_update();
794                 return;
795         }
796
797         /* data and camera synchronize */
798         b_depsgraph = b_depsgraph_;
799
800         BL::Object b_camera_override(b_engine.camera_override());
801         sync->sync_data(b_render,
802                         b_depsgraph,
803                         b_v3d,
804                         b_camera_override,
805                         width, height,
806                         &python_thread_state);
807
808         if(b_rv3d)
809                 sync->sync_view(b_v3d, b_rv3d, width, height);
810         else
811                 sync->sync_camera(b_render, b_camera_override, width, height, "");
812
813         builtin_images_load();
814
815         /* unlock */
816         session->scene->mutex.unlock();
817
818         /* reset if needed */
819         if(scene->need_reset()) {
820                 BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
821                 session->reset(buffer_params, session_params.samples);
822
823                 /* reset time */
824                 start_resize_time = 0.0;
825         }
826 }
827
828 bool BlenderSession::draw(int w, int h)
829 {
830         /* pause in redraw in case update is not being called due to final render */
831         session->set_pause(BlenderSync::get_session_pause(b_scene, background));
832
833         /* before drawing, we verify camera and viewport size changes, because
834          * we do not get update callbacks for those, we must detect them here */
835         if(session->ready_to_reset()) {
836                 bool reset = false;
837
838                 /* if dimensions changed, reset */
839                 if(width != w || height != h) {
840                         if(start_resize_time == 0.0) {
841                                 /* don't react immediately to resizes to avoid flickery resizing
842                                  * of the viewport, and some window managers changing the window
843                                  * size temporarily on unminimize */
844                                 start_resize_time = time_dt();
845                                 tag_redraw();
846                         }
847                         else if(time_dt() - start_resize_time < 0.2) {
848                                 tag_redraw();
849                         }
850                         else {
851                                 width = w;
852                                 height = h;
853                                 reset = true;
854                         }
855                 }
856
857                 /* try to acquire mutex. if we can't, come back later */
858                 if(!session->scene->mutex.try_lock()) {
859                         tag_update();
860                 }
861                 else {
862                         /* update camera from 3d view */
863
864                         sync->sync_view(b_v3d, b_rv3d, width, height);
865
866                         if(scene->camera->need_update)
867                                 reset = true;
868
869                         session->scene->mutex.unlock();
870                 }
871
872                 /* reset if requested */
873                 if(reset) {
874                         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
875                         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
876                         bool session_pause = BlenderSync::get_session_pause(b_scene, background);
877
878                         if(session_pause == false) {
879                                 session->reset(buffer_params, session_params.samples);
880                                 start_resize_time = 0.0;
881                         }
882                 }
883         }
884         else {
885                 tag_update();
886         }
887
888         /* update status and progress for 3d view draw */
889         update_status_progress();
890
891         /* draw */
892         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
893         DeviceDrawParams draw_params;
894
895         if(session->params.display_buffer_linear) {
896                 draw_params.bind_display_space_shader_cb = function_bind(&BL::RenderEngine::bind_display_space_shader, &b_engine, b_scene);
897                 draw_params.unbind_display_space_shader_cb = function_bind(&BL::RenderEngine::unbind_display_space_shader, &b_engine);
898         }
899
900         return !session->draw(buffer_params, draw_params);
901 }
902
903 void BlenderSession::get_status(string& status, string& substatus)
904 {
905         session->progress.get_status(status, substatus);
906 }
907
908 void BlenderSession::get_progress(float& progress, double& total_time, double& render_time)
909 {
910         session->progress.get_time(total_time, render_time);
911         progress = session->progress.get_progress();
912 }
913
914 void BlenderSession::update_bake_progress()
915 {
916         float progress = session->progress.get_progress();
917
918         if(progress != last_progress) {
919                 b_engine.update_progress(progress);
920                 last_progress = progress;
921         }
922 }
923
924 void BlenderSession::update_status_progress()
925 {
926         string timestatus, status, substatus;
927         string scene = "";
928         float progress;
929         double total_time, remaining_time = 0, render_time;
930         char time_str[128];
931         float mem_used = (float)session->stats.mem_used / 1024.0f / 1024.0f;
932         float mem_peak = (float)session->stats.mem_peak / 1024.0f / 1024.0f;
933
934         get_status(status, substatus);
935         get_progress(progress, total_time, render_time);
936
937         if(progress > 0)
938                 remaining_time = (1.0 - (double)progress) * (render_time / (double)progress);
939
940         if(background) {
941                 scene += " | " + b_scene.name();
942                 if(b_rlay_name != "")
943                         scene += ", "  + b_rlay_name;
944
945                 if(b_rview_name != "")
946                         scene += ", " + b_rview_name;
947         }
948         else {
949                 BLI_timecode_string_from_time_simple(time_str, sizeof(time_str), total_time);
950                 timestatus = "Time:" + string(time_str) + " | ";
951         }
952
953         if(remaining_time > 0) {
954                 BLI_timecode_string_from_time_simple(time_str, sizeof(time_str), remaining_time);
955                 timestatus += "Remaining:" + string(time_str) + " | ";
956         }
957
958         timestatus += string_printf("Mem:%.2fM, Peak:%.2fM", (double)mem_used, (double)mem_peak);
959
960         if(status.size() > 0)
961                 status = " | " + status;
962         if(substatus.size() > 0)
963                 status += " | " + substatus;
964
965         double current_time = time_dt();
966         /* When rendering in a window, redraw the status at least once per second to keep the elapsed and remaining time up-to-date.
967          * For headless rendering, only report when something significant changes to keep the console output readable. */
968         if(status != last_status || (!headless && (current_time - last_status_time) > 1.0)) {
969                 b_engine.update_stats("", (timestatus + scene + status).c_str());
970                 b_engine.update_memory_stats(mem_used, mem_peak);
971                 last_status = status;
972                 last_status_time = current_time;
973         }
974         if(progress != last_progress) {
975                 b_engine.update_progress(progress);
976                 last_progress = progress;
977         }
978
979         if(session->progress.get_error()) {
980                 string error = session->progress.get_error_message();
981                 if(error != last_error) {
982                         /* TODO(sergey): Currently C++ RNA API doesn't let us to
983                          * use mnemonic name for the variable. Would be nice to
984                          * have this figured out.
985                          *
986                          * For until then, 1 << 5 means RPT_ERROR.
987                          */
988                         b_engine.report(1 << 5, error.c_str());
989                         b_engine.error_set(error.c_str());
990                         last_error = error;
991                 }
992         }
993 }
994
995 void BlenderSession::tag_update()
996 {
997         /* tell blender that we want to get another update callback */
998         b_engine.tag_update();
999 }
1000
1001 void BlenderSession::tag_redraw()
1002 {
1003         if(background) {
1004                 /* update stats and progress, only for background here because
1005                  * in 3d view we do it in draw for thread safety reasons */
1006                 update_status_progress();
1007
1008                 /* offline render, redraw if timeout passed */
1009                 if(time_dt() - last_redraw_time > 1.0) {
1010                         b_engine.tag_redraw();
1011                         last_redraw_time = time_dt();
1012                 }
1013         }
1014         else {
1015                 /* tell blender that we want to redraw */
1016                 b_engine.tag_redraw();
1017         }
1018 }
1019
1020 void BlenderSession::test_cancel()
1021 {
1022         /* test if we need to cancel rendering */
1023         if(background)
1024                 if(b_engine.test_break())
1025                         session->progress.set_cancel("Cancelled");
1026 }
1027
1028 /* builtin image file name is actually an image datablock name with
1029  * absolute sequence frame number concatenated via '@' character
1030  *
1031  * this function splits frame from builtin name
1032  */
1033 int BlenderSession::builtin_image_frame(const string &builtin_name)
1034 {
1035         int last = builtin_name.find_last_of('@');
1036         return atoi(builtin_name.substr(last + 1, builtin_name.size() - last - 1).c_str());
1037 }
1038
1039 void BlenderSession::builtin_image_info(const string &builtin_name,
1040                                         void *builtin_data,
1041                                         ImageMetaData& metadata)
1042 {
1043         /* empty image */
1044         metadata.width = 1;
1045         metadata.height = 1;
1046
1047         if(!builtin_data)
1048                 return;
1049
1050         /* recover ID pointer */
1051         PointerRNA ptr;
1052         RNA_id_pointer_create((ID*)builtin_data, &ptr);
1053         BL::ID b_id(ptr);
1054
1055         if(b_id.is_a(&RNA_Image)) {
1056                 /* image data */
1057                 BL::Image b_image(b_id);
1058
1059                 metadata.builtin_free_cache = !b_image.has_data();
1060                 metadata.is_float = b_image.is_float();
1061                 metadata.width = b_image.size()[0];
1062                 metadata.height = b_image.size()[1];
1063                 metadata.depth = 1;
1064                 metadata.channels = b_image.channels();
1065         }
1066         else if(b_id.is_a(&RNA_Object)) {
1067                 /* smoke volume data */
1068                 BL::Object b_ob(b_id);
1069                 BL::SmokeDomainSettings b_domain = object_smoke_domain_find(b_ob);
1070
1071                 metadata.is_float = true;
1072                 metadata.depth = 1;
1073                 metadata.channels = 1;
1074
1075                 if(!b_domain)
1076                         return;
1077
1078                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_DENSITY) ||
1079                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_FLAME) ||
1080                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT) ||
1081                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_TEMPERATURE))
1082                         metadata.channels = 1;
1083                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_COLOR))
1084                         metadata.channels = 4;
1085                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY))
1086                         metadata.channels = 3;
1087                 else
1088                         return;
1089
1090                 int3 resolution = get_int3(b_domain.domain_resolution());
1091                 int amplify = (b_domain.use_high_resolution())? b_domain.amplify() + 1: 1;
1092
1093                 /* Velocity and heat data is always low-resolution. */
1094                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY) ||
1095                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT))
1096                 {
1097                         amplify = 1;
1098                 }
1099
1100                 metadata.width = resolution.x * amplify;
1101                 metadata.height = resolution.y * amplify;
1102                 metadata.depth = resolution.z * amplify;
1103         }
1104         else {
1105                 /* TODO(sergey): Check we're indeed in shader node tree. */
1106                 PointerRNA ptr;
1107                 RNA_pointer_create(NULL, &RNA_Node, builtin_data, &ptr);
1108                 BL::Node b_node(ptr);
1109                 if(b_node.is_a(&RNA_ShaderNodeTexPointDensity)) {
1110                         BL::ShaderNodeTexPointDensity b_point_density_node(b_node);
1111                         metadata.channels = 4;
1112                         metadata.width = b_point_density_node.resolution();
1113                         metadata.height = metadata.width;
1114                         metadata.depth = metadata.width;
1115                         metadata.is_float = true;
1116                 }
1117         }
1118 }
1119
1120 bool BlenderSession::builtin_image_pixels(const string &builtin_name,
1121                                           void *builtin_data,
1122                                           unsigned char *pixels,
1123                                           const size_t pixels_size,
1124                                           const bool free_cache)
1125 {
1126         if(!builtin_data) {
1127                 return false;
1128         }
1129
1130         const int frame = builtin_image_frame(builtin_name);
1131
1132         PointerRNA ptr;
1133         RNA_id_pointer_create((ID*)builtin_data, &ptr);
1134         BL::Image b_image(ptr);
1135
1136         const int width = b_image.size()[0];
1137         const int height = b_image.size()[1];
1138         const int channels = b_image.channels();
1139
1140         unsigned char *image_pixels = image_get_pixels_for_frame(b_image, frame);
1141         const size_t num_pixels = ((size_t)width) * height;
1142
1143         if(image_pixels && num_pixels * channels == pixels_size) {
1144                 memcpy(pixels, image_pixels, pixels_size * sizeof(unsigned char));
1145         }
1146         else {
1147                 if(channels == 1) {
1148                         memset(pixels, 0, pixels_size * sizeof(unsigned char));
1149                 }
1150                 else {
1151                         const size_t num_pixels_safe = pixels_size / channels;
1152                         unsigned char *cp = pixels;
1153                         for(size_t i = 0; i < num_pixels_safe; i++, cp += channels) {
1154                                 cp[0] = 255;
1155                                 cp[1] = 0;
1156                                 cp[2] = 255;
1157                                 if(channels == 4) {
1158                                         cp[3] = 255;
1159                                 }
1160                         }
1161                 }
1162         }
1163
1164         if(image_pixels) {
1165                 MEM_freeN(image_pixels);
1166         }
1167
1168         /* Free image buffers to save memory during render. */
1169         if(free_cache) {
1170                 b_image.buffers_free();
1171         }
1172
1173         /* Premultiply, byte images are always straight for Blender. */
1174         unsigned char *cp = pixels;
1175         for(size_t i = 0; i < num_pixels; i++, cp += channels) {
1176                 cp[0] = (cp[0] * cp[3]) >> 8;
1177                 cp[1] = (cp[1] * cp[3]) >> 8;
1178                 cp[2] = (cp[2] * cp[3]) >> 8;
1179         }
1180         return true;
1181 }
1182
1183 bool BlenderSession::builtin_image_float_pixels(const string &builtin_name,
1184                                                 void *builtin_data,
1185                                                 float *pixels,
1186                                                 const size_t pixels_size,
1187                                                 const bool free_cache)
1188 {
1189         if(!builtin_data) {
1190                 return false;
1191         }
1192
1193         PointerRNA ptr;
1194         RNA_id_pointer_create((ID*)builtin_data, &ptr);
1195         BL::ID b_id(ptr);
1196
1197         if(b_id.is_a(&RNA_Image)) {
1198                 /* image data */
1199                 BL::Image b_image(b_id);
1200                 int frame = builtin_image_frame(builtin_name);
1201
1202                 const int width = b_image.size()[0];
1203                 const int height = b_image.size()[1];
1204                 const int channels = b_image.channels();
1205
1206                 float *image_pixels;
1207                 image_pixels = image_get_float_pixels_for_frame(b_image, frame);
1208                 const size_t num_pixels = ((size_t)width) * height;
1209
1210                 if(image_pixels && num_pixels * channels == pixels_size) {
1211                         memcpy(pixels, image_pixels, pixels_size * sizeof(float));
1212                 }
1213                 else {
1214                         if(channels == 1) {
1215                                 memset(pixels, 0, num_pixels * sizeof(float));
1216                         }
1217                         else {
1218                                 const size_t num_pixels_safe = pixels_size / channels;
1219                                 float *fp = pixels;
1220                                 for(int i = 0; i < num_pixels_safe; i++, fp += channels) {
1221                                         fp[0] = 1.0f;
1222                                         fp[1] = 0.0f;
1223                                         fp[2] = 1.0f;
1224                                         if(channels == 4) {
1225                                                 fp[3] = 1.0f;
1226                                         }
1227                                 }
1228                         }
1229                 }
1230
1231                 if(image_pixels) {
1232                         MEM_freeN(image_pixels);
1233                 }
1234
1235                 /* Free image buffers to save memory during render. */
1236                 if(free_cache) {
1237                         b_image.buffers_free();
1238                 }
1239
1240                 return true;
1241         }
1242         else if(b_id.is_a(&RNA_Object)) {
1243                 /* smoke volume data */
1244                 BL::Object b_ob(b_id);
1245                 BL::SmokeDomainSettings b_domain = object_smoke_domain_find(b_ob);
1246
1247                 if(!b_domain) {
1248                         return false;
1249                 }
1250
1251                 int3 resolution = get_int3(b_domain.domain_resolution());
1252                 int length, amplify = (b_domain.use_high_resolution())? b_domain.amplify() + 1: 1;
1253
1254                 /* Velocity and heat data is always low-resolution. */
1255                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY) ||
1256                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT))
1257                 {
1258                         amplify = 1;
1259                 }
1260
1261                 const int width = resolution.x * amplify;
1262                 const int height = resolution.y * amplify;
1263                 const int depth = resolution.z * amplify;
1264                 const size_t num_pixels = ((size_t)width) * height * depth;
1265
1266                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_DENSITY)) {
1267                         SmokeDomainSettings_density_grid_get_length(&b_domain.ptr, &length);
1268                         if(length == num_pixels) {
1269                                 SmokeDomainSettings_density_grid_get(&b_domain.ptr, pixels);
1270                                 return true;
1271                         }
1272                 }
1273                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_FLAME)) {
1274                         /* this is in range 0..1, and interpreted by the OpenGL smoke viewer
1275                          * as 1500..3000 K with the first part faded to zero density */
1276                         SmokeDomainSettings_flame_grid_get_length(&b_domain.ptr, &length);
1277                         if(length == num_pixels) {
1278                                 SmokeDomainSettings_flame_grid_get(&b_domain.ptr, pixels);
1279                                 return true;
1280                         }
1281                 }
1282                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_COLOR)) {
1283                         /* the RGB is "premultiplied" by density for better interpolation results */
1284                         SmokeDomainSettings_color_grid_get_length(&b_domain.ptr, &length);
1285                         if(length == num_pixels*4) {
1286                                 SmokeDomainSettings_color_grid_get(&b_domain.ptr, pixels);
1287                                 return true;
1288                         }
1289                 }
1290                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY)) {
1291                         SmokeDomainSettings_velocity_grid_get_length(&b_domain.ptr, &length);
1292                         if(length == num_pixels*3) {
1293                                 SmokeDomainSettings_velocity_grid_get(&b_domain.ptr, pixels);
1294                                 return true;
1295                         }
1296                 }
1297                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT)) {
1298                         SmokeDomainSettings_heat_grid_get_length(&b_domain.ptr, &length);
1299                         if(length == num_pixels) {
1300                                 SmokeDomainSettings_heat_grid_get(&b_domain.ptr, pixels);
1301                                 return true;
1302                         }
1303                 }
1304                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_TEMPERATURE)) {
1305                         SmokeDomainSettings_temperature_grid_get_length(&b_domain.ptr, &length);
1306                         if(length == num_pixels) {
1307                                 SmokeDomainSettings_temperature_grid_get(&b_domain.ptr, pixels);
1308                                 return true;
1309                         }
1310                 }
1311                 else {
1312                         fprintf(stderr,
1313                                 "Cycles error: unknown volume attribute %s, skipping\n",
1314                                 builtin_name.c_str());
1315                         pixels[0] = 0.0f;
1316                         return false;
1317                 }
1318
1319                 fprintf(stderr, "Cycles error: unexpected smoke volume resolution, skipping\n");
1320         }
1321         else {
1322                 /* We originally were passing view_layer here but in reality we need a
1323                  * a depsgraph to pass to the RE_point_density_minmax() function.
1324                  */
1325                 /* TODO(sergey): Check we're indeed in shader node tree. */
1326                 PointerRNA ptr;
1327                 RNA_pointer_create(NULL, &RNA_Node, builtin_data, &ptr);
1328                 BL::Node b_node(ptr);
1329                 if(b_node.is_a(&RNA_ShaderNodeTexPointDensity)) {
1330                         BL::ShaderNodeTexPointDensity b_point_density_node(b_node);
1331                         int length;
1332                         b_point_density_node.calc_point_density(b_depsgraph, &length, &pixels);
1333                 }
1334         }
1335
1336         return false;
1337 }
1338
1339 void BlenderSession::builtin_images_load()
1340 {
1341         /* Force builtin images to be loaded along with Blender data sync. This
1342          * is needed because we may be reading from depsgraph evaluated data which
1343          * can be freed by Blender before Cycles reads it. */
1344         ImageManager *manager = session->scene->image_manager;
1345         Device *device = session->device;
1346         manager->device_load_builtin(device, session->scene, session->progress);
1347 }
1348
1349 void BlenderSession::update_resumable_tile_manager(int num_samples)
1350 {
1351         const int num_resumable_chunks = BlenderSession::num_resumable_chunks,
1352                   current_resumable_chunk = BlenderSession::current_resumable_chunk;
1353         if(num_resumable_chunks == 0) {
1354                 return;
1355         }
1356
1357         const int num_samples_per_chunk = (int)ceilf((float)num_samples / num_resumable_chunks);
1358
1359         int range_start_sample, range_num_samples;
1360         if(current_resumable_chunk != 0) {
1361                 /* Single chunk rendering. */
1362                 range_start_sample = num_samples_per_chunk * (current_resumable_chunk - 1);
1363                 range_num_samples = num_samples_per_chunk;
1364         }
1365         else {
1366                 /* Ranged-chunks. */
1367                 const int num_chunks = end_resumable_chunk - start_resumable_chunk + 1;
1368                 range_start_sample = num_samples_per_chunk * (start_resumable_chunk - 1);
1369                 range_num_samples = num_chunks * num_samples_per_chunk;
1370         }
1371         /* Make sure we don't overshoot. */
1372         if(range_start_sample + range_num_samples > num_samples) {
1373                 range_num_samples = num_samples - range_num_samples;
1374         }
1375
1376         VLOG(1) << "Samples range start is " << range_start_sample << ", "
1377                 << "number of samples to render is " << range_num_samples;
1378
1379         scene->integrator->start_sample = range_start_sample;
1380         scene->integrator->tag_update(scene);
1381
1382         session->tile_manager.range_start_sample = range_start_sample;
1383         session->tile_manager.range_num_samples = range_num_samples;
1384 }
1385
1386 CCL_NAMESPACE_END