Merge branch 'blender2.7'
[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_algorithm.h"
34 #include "util/util_color.h"
35 #include "util/util_foreach.h"
36 #include "util/util_function.h"
37 #include "util/util_hash.h"
38 #include "util/util_logging.h"
39 #include "util/util_murmurhash.h"
40 #include "util/util_progress.h"
41 #include "util/util_time.h"
42
43 #include "blender/blender_sync.h"
44 #include "blender/blender_session.h"
45 #include "blender/blender_util.h"
46
47 CCL_NAMESPACE_BEGIN
48
49 bool BlenderSession::headless = false;
50 int BlenderSession::num_resumable_chunks = 0;
51 int BlenderSession::current_resumable_chunk = 0;
52 int BlenderSession::start_resumable_chunk = 0;
53 int BlenderSession::end_resumable_chunk = 0;
54 bool BlenderSession::print_render_stats = false;
55
56 BlenderSession::BlenderSession(BL::RenderEngine& b_engine,
57                                BL::Preferences& b_userpref,
58                                BL::BlendData& b_data,
59                                bool preview_osl)
60 : session(NULL),
61   sync(NULL),
62   b_engine(b_engine),
63   b_userpref(b_userpref),
64   b_data(b_data),
65   b_render(b_engine.render()),
66   b_depsgraph(PointerRNA_NULL),
67   b_scene(PointerRNA_NULL),
68   b_v3d(PointerRNA_NULL),
69   b_rv3d(PointerRNA_NULL),
70   width(0),
71   height(0),
72   preview_osl(preview_osl),
73   python_thread_state(NULL)
74 {
75         /* offline render */
76         background = true;
77         last_redraw_time = 0.0;
78         start_resize_time = 0.0;
79         last_status_time = 0.0;
80 }
81
82 BlenderSession::BlenderSession(BL::RenderEngine& b_engine,
83                                BL::Preferences& b_userpref,
84                                BL::BlendData& b_data,
85                                BL::SpaceView3D& b_v3d,
86                                BL::RegionView3D& b_rv3d,
87                                int width, int height)
88 : session(NULL),
89   sync(NULL),
90   b_engine(b_engine),
91   b_userpref(b_userpref),
92   b_data(b_data),
93   b_render(b_engine.render()),
94   b_depsgraph(PointerRNA_NULL),
95   b_scene(PointerRNA_NULL),
96   b_v3d(b_v3d),
97   b_rv3d(b_rv3d),
98   width(width),
99   height(height),
100   preview_osl(false),
101   python_thread_state(NULL)
102 {
103         /* 3d view render */
104         background = false;
105         last_redraw_time = 0.0;
106         start_resize_time = 0.0;
107         last_status_time = 0.0;
108 }
109
110 BlenderSession::~BlenderSession()
111 {
112         free_session();
113 }
114
115 void BlenderSession::create()
116 {
117         create_session();
118 }
119
120 void BlenderSession::create_session()
121 {
122         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
123         SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
124         bool session_pause = BlenderSync::get_session_pause(b_scene, background);
125
126         /* reset status/progress */
127         last_status = "";
128         last_error = "";
129         last_progress = -1.0f;
130         start_resize_time = 0.0;
131
132         /* create session */
133         session = new Session(session_params);
134         session->scene = scene;
135         session->progress.set_update_callback(function_bind(&BlenderSession::tag_redraw, this));
136         session->progress.set_cancel_callback(function_bind(&BlenderSession::test_cancel, this));
137         session->set_pause(session_pause);
138
139         /* create scene */
140         scene = new Scene(scene_params, session->device);
141         scene->name = b_scene.name();
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 static void add_cryptomatte_layer(BL::RenderResult& b_rr, string name, string manifest)
386 {
387         string identifier = string_printf("%08x", util_murmur_hash3(name.c_str(), name.length(), 0));
388         string prefix = "cryptomatte/" + identifier.substr(0, 7) + "/";
389
390         render_add_metadata(b_rr, prefix+"name", name);
391         render_add_metadata(b_rr, prefix+"hash", "MurmurHash3_32");
392         render_add_metadata(b_rr, prefix+"conversion", "uint32_to_float32");
393         render_add_metadata(b_rr, prefix+"manifest", manifest);
394 }
395
396 void BlenderSession::stamp_view_layer_metadata_do(const string& prefix)
397 {
398         BL::RenderResult b_rr = b_engine.get_result();
399         /* Configured number of samples for the view layer. */
400         b_rr.stamp_data_add_field((prefix + "samples").c_str(),
401                                   to_string(session->params.samples).c_str());
402         /* Store ranged samples information. */
403         if(session->tile_manager.range_num_samples != -1) {
404                 b_rr.stamp_data_add_field(
405                         (prefix + "range_start_sample").c_str(),
406                         to_string(session->tile_manager.range_start_sample).c_str());
407                 b_rr.stamp_data_add_field(
408                         (prefix + "range_num_samples").c_str(),
409                         to_string(session->tile_manager.range_num_samples).c_str());
410         }
411 }
412
413 void BlenderSession::stamp_view_layer_metadata(const string& view_layer_name)
414 {
415         stamp_view_layer_metadata_do("cycles." + view_layer_name + ".");
416 }
417
418 void BlenderSession::render(BL::Depsgraph& b_depsgraph_)
419 {
420         b_depsgraph = b_depsgraph_;
421
422         /* set callback to write out render results */
423         session->write_render_tile_cb = function_bind(&BlenderSession::write_render_tile, this, _1);
424         session->update_render_tile_cb = function_bind(&BlenderSession::update_render_tile, this, _1, _2);
425
426         /* get buffer parameters */
427         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
428         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
429
430         /* render each layer */
431         BL::ViewLayer b_view_layer = b_depsgraph.view_layer_eval();
432
433         /* temporary render result to find needed passes and views */
434         BL::RenderResult b_rr = begin_render_result(b_engine, 0, 0, 1, 1, b_view_layer.name().c_str(), NULL);
435         BL::RenderResult::layers_iterator b_single_rlay;
436         b_rr.layers.begin(b_single_rlay);
437         BL::RenderLayer b_rlay = *b_single_rlay;
438         b_rlay_name = b_view_layer.name();
439
440         /* add passes */
441         vector<Pass> passes = sync->sync_render_passes(b_rlay, b_view_layer, session_params);
442         buffer_params.passes = passes;
443
444         PointerRNA crl = RNA_pointer_get(&b_view_layer.ptr, "cycles");
445         bool full_denoising = get_boolean(crl, "use_denoising");
446         bool write_denoising_passes = get_boolean(crl, "denoising_store_passes");
447
448         bool run_denoising = full_denoising || write_denoising_passes;
449
450         session->tile_manager.schedule_denoising = run_denoising;
451         buffer_params.denoising_data_pass = run_denoising;
452         buffer_params.denoising_clean_pass = (scene->film->denoising_flags & DENOISING_CLEAN_ALL_PASSES);
453         buffer_params.denoising_prefiltered_pass = write_denoising_passes;
454
455         session->params.run_denoising = run_denoising;
456         session->params.full_denoising = full_denoising;
457         session->params.write_denoising_passes = write_denoising_passes;
458         session->params.denoising.radius = get_int(crl, "denoising_radius");
459         session->params.denoising.strength = get_float(crl, "denoising_strength");
460         session->params.denoising.feature_strength = get_float(crl, "denoising_feature_strength");
461         session->params.denoising.relative_pca = get_boolean(crl, "denoising_relative_pca");
462
463         scene->film->denoising_data_pass = buffer_params.denoising_data_pass;
464         scene->film->denoising_clean_pass = buffer_params.denoising_clean_pass;
465         scene->film->denoising_prefiltered_pass = buffer_params.denoising_prefiltered_pass;
466
467         scene->film->pass_alpha_threshold = b_view_layer.pass_alpha_threshold();
468         scene->film->tag_passes_update(scene, passes);
469         scene->film->tag_update(scene);
470         scene->integrator->tag_update(scene);
471
472         BL::RenderResult::views_iterator b_view_iter;
473
474         int num_views = 0;
475         for(b_rr.views.begin(b_view_iter); b_view_iter != b_rr.views.end(); ++b_view_iter) {
476                 num_views++;
477         }
478
479         int view_index = 0;
480         for(b_rr.views.begin(b_view_iter); b_view_iter != b_rr.views.end(); ++b_view_iter, ++view_index) {
481                 b_rview_name = b_view_iter->name();
482
483                 /* set the current view */
484                 b_engine.active_view_set(b_rview_name.c_str());
485
486                 /* update scene */
487                 BL::Object b_camera_override(b_engine.camera_override());
488                 sync->sync_camera(b_render, b_camera_override, width, height, b_rview_name.c_str());
489                 sync->sync_data(b_render,
490                                 b_depsgraph,
491                                 b_v3d,
492                                 b_camera_override,
493                                 width, height,
494                                 &python_thread_state);
495                 builtin_images_load();
496
497                 /* Attempt to free all data which is held by Blender side, since at this
498                  * point we knwo that we've got everything to render current view layer.
499                  */
500                 /* At the moment we only free if we are not doing multi-view (or if we are rendering the last view).
501                  * See T58142/D4239 for discussion.
502                  */
503                 if(view_index == num_views - 1) {
504                         free_blender_memory_if_possible();
505                 }
506
507                 /* Make sure all views have different noise patterns. - hardcoded value just to make it random */
508                 if(view_index != 0) {
509                         scene->integrator->seed += hash_int_2d(scene->integrator->seed, hash_int(view_index * 0xdeadbeef));
510                         scene->integrator->tag_update(scene);
511                 }
512
513                 /* Update number of samples per layer. */
514                 int samples = sync->get_layer_samples();
515                 bool bound_samples = sync->get_layer_bound_samples();
516                 int effective_layer_samples;
517
518                 if(samples != 0 && (!bound_samples || (samples < session_params.samples)))
519                         effective_layer_samples = samples;
520                 else
521                         effective_layer_samples = session_params.samples;
522
523                 /* Update tile manager if we're doing resumable render. */
524                 update_resumable_tile_manager(effective_layer_samples);
525
526                 /* Update session itself. */
527                 session->reset(buffer_params, effective_layer_samples);
528
529                 /* render */
530                 session->start();
531                 session->wait();
532
533                 if(!b_engine.is_preview() && background && print_render_stats) {
534                         RenderStats stats;
535                         session->collect_statistics(&stats);
536                         printf("Render statistics:\n%s\n", stats.full_report().c_str());
537                 }
538
539                 if(session->progress.get_cancel())
540                         break;
541         }
542
543         stamp_view_layer_metadata(b_rlay_name);
544
545         /* Write cryptomatte metadata. */
546         if(scene->film->cryptomatte_passes & CRYPT_OBJECT) {
547                 add_cryptomatte_layer(b_rr, b_rlay_name+".CryptoObject",
548                                                           scene->object_manager->get_cryptomatte_objects(scene));
549         }
550         if(scene->film->cryptomatte_passes & CRYPT_MATERIAL) {
551                 add_cryptomatte_layer(b_rr, b_rlay_name+".CryptoMaterial",
552                                                           scene->shader_manager->get_cryptomatte_materials(scene));
553         }
554         if(scene->film->cryptomatte_passes & CRYPT_ASSET) {
555                 add_cryptomatte_layer(b_rr, b_rlay_name+".CryptoAsset",
556                                                           scene->object_manager->get_cryptomatte_assets(scene));
557         }
558
559         /* free result without merging */
560         end_render_result(b_engine, b_rr, true, true, false);
561
562         double total_time, render_time;
563         session->progress.get_time(total_time, render_time);
564         VLOG(1) << "Total render time: " << total_time;
565         VLOG(1) << "Render time (without synchronization): " << render_time;
566
567         /* clear callback */
568         session->write_render_tile_cb = function_null;
569         session->update_render_tile_cb = function_null;
570
571         /* TODO: find a way to clear this data for persistent data render */
572 #if 0
573         /* free all memory used (host and device), so we wouldn't leave render
574          * engine with extra memory allocated
575          */
576
577         session->device_free();
578
579         delete sync;
580         sync = NULL;
581 #endif
582 }
583
584 static void populate_bake_data(BakeData *data, const
585                                int object_id,
586                                BL::BakePixel& pixel_array,
587                                const int num_pixels)
588 {
589         BL::BakePixel bp = pixel_array;
590
591         int i;
592         for(i = 0; i < num_pixels; i++) {
593                 if(bp.object_id() == object_id) {
594                         data->set(i, bp.primitive_id(), bp.uv(), bp.du_dx(), bp.du_dy(), bp.dv_dx(), bp.dv_dy());
595                 } else {
596                         data->set_null(i);
597                 }
598                 bp = bp.next();
599         }
600 }
601
602 static int bake_pass_filter_get(const int pass_filter)
603 {
604         int flag = BAKE_FILTER_NONE;
605
606         if((pass_filter & BL::BakeSettings::pass_filter_DIRECT) != 0)
607                 flag |= BAKE_FILTER_DIRECT;
608         if((pass_filter & BL::BakeSettings::pass_filter_INDIRECT) != 0)
609                 flag |= BAKE_FILTER_INDIRECT;
610         if((pass_filter & BL::BakeSettings::pass_filter_COLOR) != 0)
611                 flag |= BAKE_FILTER_COLOR;
612
613         if((pass_filter & BL::BakeSettings::pass_filter_DIFFUSE) != 0)
614                 flag |= BAKE_FILTER_DIFFUSE;
615         if((pass_filter & BL::BakeSettings::pass_filter_GLOSSY) != 0)
616                 flag |= BAKE_FILTER_GLOSSY;
617         if((pass_filter & BL::BakeSettings::pass_filter_TRANSMISSION) != 0)
618                 flag |= BAKE_FILTER_TRANSMISSION;
619         if((pass_filter & BL::BakeSettings::pass_filter_SUBSURFACE) != 0)
620                 flag |= BAKE_FILTER_SUBSURFACE;
621
622         if((pass_filter & BL::BakeSettings::pass_filter_EMIT) != 0)
623                 flag |= BAKE_FILTER_EMISSION;
624         if((pass_filter & BL::BakeSettings::pass_filter_AO) != 0)
625                 flag |= BAKE_FILTER_AO;
626
627         return flag;
628 }
629
630 void BlenderSession::bake(BL::Depsgraph& b_depsgraph_,
631                           BL::Object& b_object,
632                           const string& pass_type,
633                           const int pass_filter,
634                           const int object_id,
635                           BL::BakePixel& pixel_array,
636                           const size_t num_pixels,
637                           const int /*depth*/,
638                           float result[])
639 {
640         b_depsgraph = b_depsgraph_;
641
642         ShaderEvalType shader_type = get_shader_type(pass_type);
643
644         /* Set baking flag in advance, so kernel loading can check if we need
645          * any baking capabilities.
646          */
647         scene->bake_manager->set_baking(true);
648
649         /* ensure kernels are loaded before we do any scene updates */
650         session->load_kernels();
651
652         if(shader_type == SHADER_EVAL_UV) {
653                 /* force UV to be available */
654                 Pass::add(PASS_UV, scene->film->passes);
655         }
656
657         int bake_pass_filter = bake_pass_filter_get(pass_filter);
658         bake_pass_filter = BakeManager::shader_type_to_pass_filter(shader_type, bake_pass_filter);
659
660         /* force use_light_pass to be true if we bake more than just colors */
661         if(bake_pass_filter & ~BAKE_FILTER_COLOR) {
662                 Pass::add(PASS_LIGHT, scene->film->passes);
663         }
664
665         /* create device and update scene */
666         scene->film->tag_update(scene);
667         scene->integrator->tag_update(scene);
668
669         if(!session->progress.get_cancel()) {
670                 /* update scene */
671                 BL::Object b_camera_override(b_engine.camera_override());
672                 sync->sync_camera(b_render, b_camera_override, width, height, "");
673                 sync->sync_data(b_render,
674                                 b_depsgraph,
675                                 b_v3d,
676                                 b_camera_override,
677                                 width, height,
678                                 &python_thread_state);
679                 builtin_images_load();
680         }
681
682         BakeData *bake_data = NULL;
683
684         if(!session->progress.get_cancel()) {
685                 /* get buffer parameters */
686                 SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
687                 BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
688
689                 scene->bake_manager->set_shader_limit((size_t)b_engine.tile_x(), (size_t)b_engine.tile_y());
690
691                 /* set number of samples */
692                 session->tile_manager.set_samples(session_params.samples);
693                 session->reset(buffer_params, session_params.samples);
694                 session->update_scene();
695
696                 /* find object index. todo: is arbitrary - copied from mesh_displace.cpp */
697                 size_t object_index = OBJECT_NONE;
698                 int tri_offset = 0;
699
700                 for(size_t i = 0; i < scene->objects.size(); i++) {
701                         if(strcmp(scene->objects[i]->name.c_str(), b_object.name().c_str()) == 0) {
702                                 object_index = i;
703                                 tri_offset = scene->objects[i]->mesh->tri_offset;
704                                 break;
705                         }
706                 }
707
708                 /* Object might have been disabled for rendering or excluded in some
709                  * other way, in that case Blender will report a warning afterwards. */
710                 if (object_index != OBJECT_NONE) {
711                         int object = object_index;
712
713                         bake_data = scene->bake_manager->init(object, tri_offset, num_pixels);
714                         populate_bake_data(bake_data, object_id, pixel_array, num_pixels);
715                 }
716
717                 /* set number of samples */
718                 session->tile_manager.set_samples(session_params.samples);
719                 session->reset(buffer_params, session_params.samples);
720                 session->update_scene();
721
722                 session->progress.set_update_callback(function_bind(&BlenderSession::update_bake_progress, this));
723         }
724
725         /* Perform bake. Check cancel to avoid crash with incomplete scene data. */
726         if(!session->progress.get_cancel() && bake_data) {
727                 scene->bake_manager->bake(scene->device, &scene->dscene, scene, session->progress, shader_type, bake_pass_filter, bake_data, result);
728         }
729
730         /* free all memory used (host and device), so we wouldn't leave render
731          * engine with extra memory allocated
732          */
733
734         session->device_free();
735
736         delete sync;
737         sync = NULL;
738 }
739
740 void BlenderSession::do_write_update_render_result(BL::RenderResult& b_rr,
741                                                    BL::RenderLayer& b_rlay,
742                                                    RenderTile& rtile,
743                                                    bool do_update_only)
744 {
745         RenderBuffers *buffers = rtile.buffers;
746
747         /* copy data from device */
748         if(!buffers->copy_from_device())
749                 return;
750
751         float exposure = scene->film->exposure;
752
753         vector<float> pixels(rtile.w*rtile.h*4);
754
755         /* Adjust absolute sample number to the range. */
756         int sample = rtile.sample;
757         const int range_start_sample = session->tile_manager.range_start_sample;
758         if(range_start_sample != -1) {
759                 sample -= range_start_sample;
760         }
761
762         if(!do_update_only) {
763                 /* copy each pass */
764                 BL::RenderLayer::passes_iterator b_iter;
765
766                 for(b_rlay.passes.begin(b_iter); b_iter != b_rlay.passes.end(); ++b_iter) {
767                         BL::RenderPass b_pass(*b_iter);
768
769                         /* find matching pass type */
770                         PassType pass_type = BlenderSync::get_pass_type(b_pass);
771                         int components = b_pass.channels();
772
773                         bool read = false;
774                         if(pass_type != PASS_NONE) {
775                                 /* copy pixels */
776                                 read = buffers->get_pass_rect(pass_type, exposure, sample, components, &pixels[0], b_pass.name());
777                         }
778                         else {
779                                 int denoising_offset = BlenderSync::get_denoising_pass(b_pass);
780                                 if(denoising_offset >= 0) {
781                                         read = buffers->get_denoising_pass_rect(denoising_offset, exposure, sample, components, &pixels[0]);
782                                 }
783                         }
784
785                         if(!read) {
786                                 memset(&pixels[0], 0, pixels.size()*sizeof(float));
787                         }
788
789                         b_pass.rect(&pixels[0]);
790                 }
791         }
792         else {
793                 /* copy combined pass */
794                 BL::RenderPass b_combined_pass(b_rlay.passes.find_by_name("Combined", b_rview_name.c_str()));
795                 if(buffers->get_pass_rect(PASS_COMBINED, exposure, sample, 4, &pixels[0], "Combined"))
796                         b_combined_pass.rect(&pixels[0]);
797         }
798
799         /* tag result as updated */
800         b_engine.update_result(b_rr);
801 }
802
803 void BlenderSession::write_render_result(BL::RenderResult& b_rr,
804                                          BL::RenderLayer& b_rlay,
805                                          RenderTile& rtile)
806 {
807         do_write_update_render_result(b_rr, b_rlay, rtile, false);
808 }
809
810 void BlenderSession::update_render_result(BL::RenderResult& b_rr,
811                                           BL::RenderLayer& b_rlay,
812                                           RenderTile& rtile)
813 {
814         do_write_update_render_result(b_rr, b_rlay, rtile, true);
815 }
816
817 void BlenderSession::synchronize(BL::Depsgraph& b_depsgraph_)
818 {
819         /* only used for viewport render */
820         if(!b_v3d)
821                 return;
822
823         /* on session/scene parameter changes, we recreate session entirely */
824         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
825         SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
826         bool session_pause = BlenderSync::get_session_pause(b_scene, background);
827
828         if(session->params.modified(session_params) ||
829            scene->params.modified(scene_params))
830         {
831                 free_session();
832                 create_session();
833                 return;
834         }
835
836         /* increase samples, but never decrease */
837         session->set_samples(session_params.samples);
838         session->set_pause(session_pause);
839
840         /* copy recalc flags, outside of mutex so we can decide to do the real
841          * synchronization at a later time to not block on running updates */
842         sync->sync_recalc(b_depsgraph_);
843
844         /* don't do synchronization if on pause */
845         if(session_pause) {
846                 tag_update();
847                 return;
848         }
849
850         /* try to acquire mutex. if we don't want to or can't, come back later */
851         if(!session->ready_to_reset() || !session->scene->mutex.try_lock()) {
852                 tag_update();
853                 return;
854         }
855
856         /* data and camera synchronize */
857         b_depsgraph = b_depsgraph_;
858
859         BL::Object b_camera_override(b_engine.camera_override());
860         sync->sync_data(b_render,
861                         b_depsgraph,
862                         b_v3d,
863                         b_camera_override,
864                         width, height,
865                         &python_thread_state);
866
867         if(b_rv3d)
868                 sync->sync_view(b_v3d, b_rv3d, width, height);
869         else
870                 sync->sync_camera(b_render, b_camera_override, width, height, "");
871
872         builtin_images_load();
873
874         /* unlock */
875         session->scene->mutex.unlock();
876
877         /* reset if needed */
878         if(scene->need_reset()) {
879                 BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
880                 session->reset(buffer_params, session_params.samples);
881
882                 /* reset time */
883                 start_resize_time = 0.0;
884         }
885
886         /* Start rendering thread, if it's not running already. Do this
887          * after all scene data has been synced at least once. */
888         session->start();
889 }
890
891 bool BlenderSession::draw(int w, int h)
892 {
893         /* pause in redraw in case update is not being called due to final render */
894         session->set_pause(BlenderSync::get_session_pause(b_scene, background));
895
896         /* before drawing, we verify camera and viewport size changes, because
897          * we do not get update callbacks for those, we must detect them here */
898         if(session->ready_to_reset()) {
899                 bool reset = false;
900
901                 /* if dimensions changed, reset */
902                 if(width != w || height != h) {
903                         if(start_resize_time == 0.0) {
904                                 /* don't react immediately to resizes to avoid flickery resizing
905                                  * of the viewport, and some window managers changing the window
906                                  * size temporarily on unminimize */
907                                 start_resize_time = time_dt();
908                                 tag_redraw();
909                         }
910                         else if(time_dt() - start_resize_time < 0.2) {
911                                 tag_redraw();
912                         }
913                         else {
914                                 width = w;
915                                 height = h;
916                                 reset = true;
917                         }
918                 }
919
920                 /* try to acquire mutex. if we can't, come back later */
921                 if(!session->scene->mutex.try_lock()) {
922                         tag_update();
923                 }
924                 else {
925                         /* update camera from 3d view */
926
927                         sync->sync_view(b_v3d, b_rv3d, width, height);
928
929                         if(scene->camera->need_update)
930                                 reset = true;
931
932                         session->scene->mutex.unlock();
933                 }
934
935                 /* reset if requested */
936                 if(reset) {
937                         SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
938                         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
939                         bool session_pause = BlenderSync::get_session_pause(b_scene, background);
940
941                         if(session_pause == false) {
942                                 session->reset(buffer_params, session_params.samples);
943                                 start_resize_time = 0.0;
944                         }
945                 }
946         }
947         else {
948                 tag_update();
949         }
950
951         /* update status and progress for 3d view draw */
952         update_status_progress();
953
954         /* draw */
955         BufferParams buffer_params = BlenderSync::get_buffer_params(b_render, b_v3d, b_rv3d, scene->camera, width, height);
956         DeviceDrawParams draw_params;
957
958         if(session->params.display_buffer_linear) {
959                 draw_params.bind_display_space_shader_cb = function_bind(&BL::RenderEngine::bind_display_space_shader, &b_engine, b_scene);
960                 draw_params.unbind_display_space_shader_cb = function_bind(&BL::RenderEngine::unbind_display_space_shader, &b_engine);
961         }
962
963         return !session->draw(buffer_params, draw_params);
964 }
965
966 void BlenderSession::get_status(string& status, string& substatus)
967 {
968         session->progress.get_status(status, substatus);
969 }
970
971 void BlenderSession::get_progress(float& progress, double& total_time, double& render_time)
972 {
973         session->progress.get_time(total_time, render_time);
974         progress = session->progress.get_progress();
975 }
976
977 void BlenderSession::update_bake_progress()
978 {
979         float progress = session->progress.get_progress();
980
981         if(progress != last_progress) {
982                 b_engine.update_progress(progress);
983                 last_progress = progress;
984         }
985 }
986
987 void BlenderSession::update_status_progress()
988 {
989         string timestatus, status, substatus;
990         string scene_status = "";
991         float progress;
992         double total_time, remaining_time = 0, render_time;
993         char time_str[128];
994         float mem_used = (float)session->stats.mem_used / 1024.0f / 1024.0f;
995         float mem_peak = (float)session->stats.mem_peak / 1024.0f / 1024.0f;
996
997         get_status(status, substatus);
998         get_progress(progress, total_time, render_time);
999
1000         if(progress > 0)
1001                 remaining_time = (1.0 - (double)progress) * (render_time / (double)progress);
1002
1003         if(background) {
1004                 scene_status += " | " + scene->name;
1005                 if(b_rlay_name != "")
1006                         scene_status += ", "  + b_rlay_name;
1007
1008                 if(b_rview_name != "")
1009                         scene_status += ", " + b_rview_name;
1010
1011                 if(remaining_time > 0) {
1012                         BLI_timecode_string_from_time_simple(time_str, sizeof(time_str), remaining_time);
1013                         timestatus += "Remaining:" + string(time_str) + " | ";
1014                 }
1015
1016                 timestatus += string_printf("Mem:%.2fM, Peak:%.2fM", (double)mem_used, (double)mem_peak);
1017
1018                 if(status.size() > 0)
1019                         status = " | " + status;
1020                 if(substatus.size() > 0)
1021                         status += " | " + substatus;
1022         }
1023
1024         double current_time = time_dt();
1025         /* When rendering in a window, redraw the status at least once per second to keep the elapsed and remaining time up-to-date.
1026          * For headless rendering, only report when something significant changes to keep the console output readable. */
1027         if(status != last_status || (!headless && (current_time - last_status_time) > 1.0)) {
1028                 b_engine.update_stats("", (timestatus + scene_status + status).c_str());
1029                 b_engine.update_memory_stats(mem_used, mem_peak);
1030                 last_status = status;
1031                 last_status_time = current_time;
1032         }
1033         if(progress != last_progress) {
1034                 b_engine.update_progress(progress);
1035                 last_progress = progress;
1036         }
1037
1038         if(session->progress.get_error()) {
1039                 string error = session->progress.get_error_message();
1040                 if(error != last_error) {
1041                         /* TODO(sergey): Currently C++ RNA API doesn't let us to
1042                          * use mnemonic name for the variable. Would be nice to
1043                          * have this figured out.
1044                          *
1045                          * For until then, 1 << 5 means RPT_ERROR.
1046                          */
1047                         b_engine.report(1 << 5, error.c_str());
1048                         b_engine.error_set(error.c_str());
1049                         last_error = error;
1050                 }
1051         }
1052 }
1053
1054 void BlenderSession::tag_update()
1055 {
1056         /* tell blender that we want to get another update callback */
1057         b_engine.tag_update();
1058 }
1059
1060 void BlenderSession::tag_redraw()
1061 {
1062         if(background) {
1063                 /* update stats and progress, only for background here because
1064                  * in 3d view we do it in draw for thread safety reasons */
1065                 update_status_progress();
1066
1067                 /* offline render, redraw if timeout passed */
1068                 if(time_dt() - last_redraw_time > 1.0) {
1069                         b_engine.tag_redraw();
1070                         last_redraw_time = time_dt();
1071                 }
1072         }
1073         else {
1074                 /* tell blender that we want to redraw */
1075                 b_engine.tag_redraw();
1076         }
1077 }
1078
1079 void BlenderSession::test_cancel()
1080 {
1081         /* test if we need to cancel rendering */
1082         if(background)
1083                 if(b_engine.test_break())
1084                         session->progress.set_cancel("Cancelled");
1085 }
1086
1087 /* builtin image file name is actually an image datablock name with
1088  * absolute sequence frame number concatenated via '@' character
1089  *
1090  * this function splits frame from builtin name
1091  */
1092 int BlenderSession::builtin_image_frame(const string &builtin_name)
1093 {
1094         int last = builtin_name.find_last_of('@');
1095         return atoi(builtin_name.substr(last + 1, builtin_name.size() - last - 1).c_str());
1096 }
1097
1098 void BlenderSession::builtin_image_info(const string &builtin_name,
1099                                         void *builtin_data,
1100                                         ImageMetaData& metadata)
1101 {
1102         /* empty image */
1103         metadata.width = 1;
1104         metadata.height = 1;
1105
1106         if(!builtin_data)
1107                 return;
1108
1109         /* recover ID pointer */
1110         PointerRNA ptr;
1111         RNA_id_pointer_create((ID*)builtin_data, &ptr);
1112         BL::ID b_id(ptr);
1113
1114         if(b_id.is_a(&RNA_Image)) {
1115                 /* image data */
1116                 BL::Image b_image(b_id);
1117
1118                 metadata.builtin_free_cache = !b_image.has_data();
1119                 metadata.is_float = b_image.is_float();
1120                 metadata.width = b_image.size()[0];
1121                 metadata.height = b_image.size()[1];
1122                 metadata.depth = 1;
1123                 metadata.channels = b_image.channels();
1124         }
1125         else if(b_id.is_a(&RNA_Object)) {
1126                 /* smoke volume data */
1127                 BL::Object b_ob(b_id);
1128                 BL::SmokeDomainSettings b_domain = object_smoke_domain_find(b_ob);
1129
1130                 metadata.is_float = true;
1131                 metadata.depth = 1;
1132                 metadata.channels = 1;
1133
1134                 if(!b_domain)
1135                         return;
1136
1137                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_DENSITY) ||
1138                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_FLAME) ||
1139                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT) ||
1140                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_TEMPERATURE))
1141                         metadata.channels = 1;
1142                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_COLOR))
1143                         metadata.channels = 4;
1144                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY))
1145                         metadata.channels = 3;
1146                 else
1147                         return;
1148
1149                 int3 resolution = get_int3(b_domain.domain_resolution());
1150                 int amplify = (b_domain.use_high_resolution())? b_domain.amplify() + 1: 1;
1151
1152                 /* Velocity and heat data is always low-resolution. */
1153                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY) ||
1154                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT))
1155                 {
1156                         amplify = 1;
1157                 }
1158
1159                 metadata.width = resolution.x * amplify;
1160                 metadata.height = resolution.y * amplify;
1161                 metadata.depth = resolution.z * amplify;
1162         }
1163         else {
1164                 /* TODO(sergey): Check we're indeed in shader node tree. */
1165                 PointerRNA ptr;
1166                 RNA_pointer_create(NULL, &RNA_Node, builtin_data, &ptr);
1167                 BL::Node b_node(ptr);
1168                 if(b_node.is_a(&RNA_ShaderNodeTexPointDensity)) {
1169                         BL::ShaderNodeTexPointDensity b_point_density_node(b_node);
1170                         metadata.channels = 4;
1171                         metadata.width = b_point_density_node.resolution();
1172                         metadata.height = metadata.width;
1173                         metadata.depth = metadata.width;
1174                         metadata.is_float = true;
1175                 }
1176         }
1177 }
1178
1179 bool BlenderSession::builtin_image_pixels(const string &builtin_name,
1180                                           void *builtin_data,
1181                                           unsigned char *pixels,
1182                                           const size_t pixels_size,
1183                                           const bool free_cache)
1184 {
1185         if(!builtin_data) {
1186                 return false;
1187         }
1188
1189         const int frame = builtin_image_frame(builtin_name);
1190
1191         PointerRNA ptr;
1192         RNA_id_pointer_create((ID*)builtin_data, &ptr);
1193         BL::Image b_image(ptr);
1194
1195         const int width = b_image.size()[0];
1196         const int height = b_image.size()[1];
1197         const int channels = b_image.channels();
1198
1199         unsigned char *image_pixels = image_get_pixels_for_frame(b_image, frame);
1200         const size_t num_pixels = ((size_t)width) * height;
1201
1202         if(image_pixels && num_pixels * channels == pixels_size) {
1203                 memcpy(pixels, image_pixels, pixels_size * sizeof(unsigned char));
1204         }
1205         else {
1206                 if(channels == 1) {
1207                         memset(pixels, 0, pixels_size * sizeof(unsigned char));
1208                 }
1209                 else {
1210                         const size_t num_pixels_safe = pixels_size / channels;
1211                         unsigned char *cp = pixels;
1212                         for(size_t i = 0; i < num_pixels_safe; i++, cp += channels) {
1213                                 cp[0] = 255;
1214                                 cp[1] = 0;
1215                                 cp[2] = 255;
1216                                 if(channels == 4) {
1217                                         cp[3] = 255;
1218                                 }
1219                         }
1220                 }
1221         }
1222
1223         if(image_pixels) {
1224                 MEM_freeN(image_pixels);
1225         }
1226
1227         /* Free image buffers to save memory during render. */
1228         if(free_cache) {
1229                 b_image.buffers_free();
1230         }
1231
1232         /* Premultiply, byte images are always straight for Blender. */
1233         unsigned char *cp = pixels;
1234         for(size_t i = 0; i < num_pixels; i++, cp += channels) {
1235                 cp[0] = (cp[0] * cp[3]) >> 8;
1236                 cp[1] = (cp[1] * cp[3]) >> 8;
1237                 cp[2] = (cp[2] * cp[3]) >> 8;
1238         }
1239         return true;
1240 }
1241
1242 bool BlenderSession::builtin_image_float_pixels(const string &builtin_name,
1243                                                 void *builtin_data,
1244                                                 float *pixels,
1245                                                 const size_t pixels_size,
1246                                                 const bool free_cache)
1247 {
1248         if(!builtin_data) {
1249                 return false;
1250         }
1251
1252         PointerRNA ptr;
1253         RNA_id_pointer_create((ID*)builtin_data, &ptr);
1254         BL::ID b_id(ptr);
1255
1256         if(b_id.is_a(&RNA_Image)) {
1257                 /* image data */
1258                 BL::Image b_image(b_id);
1259                 int frame = builtin_image_frame(builtin_name);
1260
1261                 const int width = b_image.size()[0];
1262                 const int height = b_image.size()[1];
1263                 const int channels = b_image.channels();
1264
1265                 float *image_pixels;
1266                 image_pixels = image_get_float_pixels_for_frame(b_image, frame);
1267                 const size_t num_pixels = ((size_t)width) * height;
1268
1269                 if(image_pixels && num_pixels * channels == pixels_size) {
1270                         memcpy(pixels, image_pixels, pixels_size * sizeof(float));
1271                 }
1272                 else {
1273                         if(channels == 1) {
1274                                 memset(pixels, 0, num_pixels * sizeof(float));
1275                         }
1276                         else {
1277                                 const size_t num_pixels_safe = pixels_size / channels;
1278                                 float *fp = pixels;
1279                                 for(int i = 0; i < num_pixels_safe; i++, fp += channels) {
1280                                         fp[0] = 1.0f;
1281                                         fp[1] = 0.0f;
1282                                         fp[2] = 1.0f;
1283                                         if(channels == 4) {
1284                                                 fp[3] = 1.0f;
1285                                         }
1286                                 }
1287                         }
1288                 }
1289
1290                 if(image_pixels) {
1291                         MEM_freeN(image_pixels);
1292                 }
1293
1294                 /* Free image buffers to save memory during render. */
1295                 if(free_cache) {
1296                         b_image.buffers_free();
1297                 }
1298
1299                 return true;
1300         }
1301         else if(b_id.is_a(&RNA_Object)) {
1302                 /* smoke volume data */
1303                 BL::Object b_ob(b_id);
1304                 BL::SmokeDomainSettings b_domain = object_smoke_domain_find(b_ob);
1305
1306                 if(!b_domain) {
1307                         return false;
1308                 }
1309
1310                 int3 resolution = get_int3(b_domain.domain_resolution());
1311                 int length, amplify = (b_domain.use_high_resolution())? b_domain.amplify() + 1: 1;
1312
1313                 /* Velocity and heat data is always low-resolution. */
1314                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY) ||
1315                    builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT))
1316                 {
1317                         amplify = 1;
1318                 }
1319
1320                 const int width = resolution.x * amplify;
1321                 const int height = resolution.y * amplify;
1322                 const int depth = resolution.z * amplify;
1323                 const size_t num_pixels = ((size_t)width) * height * depth;
1324
1325                 if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_DENSITY)) {
1326                         SmokeDomainSettings_density_grid_get_length(&b_domain.ptr, &length);
1327                         if(length == num_pixels) {
1328                                 SmokeDomainSettings_density_grid_get(&b_domain.ptr, pixels);
1329                                 return true;
1330                         }
1331                 }
1332                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_FLAME)) {
1333                         /* this is in range 0..1, and interpreted by the OpenGL smoke viewer
1334                          * as 1500..3000 K with the first part faded to zero density */
1335                         SmokeDomainSettings_flame_grid_get_length(&b_domain.ptr, &length);
1336                         if(length == num_pixels) {
1337                                 SmokeDomainSettings_flame_grid_get(&b_domain.ptr, pixels);
1338                                 return true;
1339                         }
1340                 }
1341                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_COLOR)) {
1342                         /* the RGB is "premultiplied" by density for better interpolation results */
1343                         SmokeDomainSettings_color_grid_get_length(&b_domain.ptr, &length);
1344                         if(length == num_pixels*4) {
1345                                 SmokeDomainSettings_color_grid_get(&b_domain.ptr, pixels);
1346                                 return true;
1347                         }
1348                 }
1349                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY)) {
1350                         SmokeDomainSettings_velocity_grid_get_length(&b_domain.ptr, &length);
1351                         if(length == num_pixels*3) {
1352                                 SmokeDomainSettings_velocity_grid_get(&b_domain.ptr, pixels);
1353                                 return true;
1354                         }
1355                 }
1356                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT)) {
1357                         SmokeDomainSettings_heat_grid_get_length(&b_domain.ptr, &length);
1358                         if(length == num_pixels) {
1359                                 SmokeDomainSettings_heat_grid_get(&b_domain.ptr, pixels);
1360                                 return true;
1361                         }
1362                 }
1363                 else if(builtin_name == Attribute::standard_name(ATTR_STD_VOLUME_TEMPERATURE)) {
1364                         SmokeDomainSettings_temperature_grid_get_length(&b_domain.ptr, &length);
1365                         if(length == num_pixels) {
1366                                 SmokeDomainSettings_temperature_grid_get(&b_domain.ptr, pixels);
1367                                 return true;
1368                         }
1369                 }
1370                 else {
1371                         fprintf(stderr,
1372                                 "Cycles error: unknown volume attribute %s, skipping\n",
1373                                 builtin_name.c_str());
1374                         pixels[0] = 0.0f;
1375                         return false;
1376                 }
1377
1378                 fprintf(stderr, "Cycles error: unexpected smoke volume resolution, skipping\n");
1379         }
1380         else {
1381                 /* We originally were passing view_layer here but in reality we need a
1382                  * a depsgraph to pass to the RE_point_density_minmax() function.
1383                  */
1384                 /* TODO(sergey): Check we're indeed in shader node tree. */
1385                 PointerRNA ptr;
1386                 RNA_pointer_create(NULL, &RNA_Node, builtin_data, &ptr);
1387                 BL::Node b_node(ptr);
1388                 if(b_node.is_a(&RNA_ShaderNodeTexPointDensity)) {
1389                         BL::ShaderNodeTexPointDensity b_point_density_node(b_node);
1390                         int length;
1391                         b_point_density_node.calc_point_density(b_depsgraph, &length, &pixels);
1392                 }
1393         }
1394
1395         return false;
1396 }
1397
1398 void BlenderSession::builtin_images_load()
1399 {
1400         /* Force builtin images to be loaded along with Blender data sync. This
1401          * is needed because we may be reading from depsgraph evaluated data which
1402          * can be freed by Blender before Cycles reads it. */
1403         ImageManager *manager = session->scene->image_manager;
1404         Device *device = session->device;
1405         manager->device_load_builtin(device, session->scene, session->progress);
1406 }
1407
1408 void BlenderSession::update_resumable_tile_manager(int num_samples)
1409 {
1410         const int num_resumable_chunks = BlenderSession::num_resumable_chunks,
1411                   current_resumable_chunk = BlenderSession::current_resumable_chunk;
1412         if(num_resumable_chunks == 0) {
1413                 return;
1414         }
1415
1416         if (num_resumable_chunks > num_samples) {
1417                 fprintf(stderr, "Cycles warning: more sample chunks (%d) than samples (%d), "
1418                         "this will cause some samples to be included in multiple chunks.\n",
1419                         num_resumable_chunks, num_samples);
1420         }
1421
1422         const float num_samples_per_chunk = (float)num_samples / num_resumable_chunks;
1423
1424         float range_start_sample, range_num_samples;
1425         if(current_resumable_chunk != 0) {
1426                 /* Single chunk rendering. */
1427                 range_start_sample = num_samples_per_chunk * (current_resumable_chunk - 1);
1428                 range_num_samples = num_samples_per_chunk;
1429         }
1430         else {
1431                 /* Ranged-chunks. */
1432                 const int num_chunks = end_resumable_chunk - start_resumable_chunk + 1;
1433                 range_start_sample = num_samples_per_chunk * (start_resumable_chunk - 1);
1434                 range_num_samples = num_chunks * num_samples_per_chunk;
1435         }
1436
1437         /* Round after doing the multiplications with num_chunks and num_samples_per_chunk
1438          * to allow for many small chunks. */
1439         int rounded_range_start_sample = (int)floor(range_start_sample + 0.5f);
1440         int rounded_range_num_samples = max((int)floor(range_num_samples + 0.5f), 1);
1441
1442         /* Make sure we don't overshoot. */
1443         if(rounded_range_start_sample + rounded_range_num_samples > num_samples) {
1444                 rounded_range_num_samples = num_samples - rounded_range_num_samples;
1445         }
1446
1447         VLOG(1) << "Samples range start is " << range_start_sample << ", "
1448                 << "number of samples to render is " << range_num_samples;
1449
1450         scene->integrator->start_sample = rounded_range_start_sample;
1451         scene->integrator->tag_update(scene);
1452
1453         session->tile_manager.range_start_sample = rounded_range_start_sample;
1454         session->tile_manager.range_num_samples = rounded_range_num_samples;
1455 }
1456
1457 void BlenderSession::free_blender_memory_if_possible()
1458 {
1459         if(!background) {
1460                 /* During interactive render we can not free anything: attempts to save
1461                  * memory would cause things to be allocated and evaluated for every
1462                  * updated sample.
1463                  */
1464                 return;
1465         }
1466         b_engine.free_blender_memory();
1467 }
1468
1469 CCL_NAMESPACE_END