Mercurial > hg > orthanc-stone
annotate Framework/Widgets/LayeredSceneWidget.cpp @ 53:c2dc924f1a63 wasm
removing threading out of the framework
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 27 Apr 2017 16:57:49 +0200 |
| parents | 25befef48c35 |
| children | ca644004d2ee |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
|
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changeset
|
5 * Copyright (C) 2017 Osimis, Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 47 | 8 * modify it under the terms of the GNU Affero General Public License |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 0 | 11 * |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 47 | 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 0 | 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #define _USE_MATH_DEFINES // To access M_PI in Visual Studio | |
| 23 #include <cmath> | |
| 24 | |
| 25 #include "LayeredSceneWidget.h" | |
| 26 | |
| 16 | 27 #include "../../Resources/Orthanc/Core/OrthancException.h" |
| 0 | 28 |
|
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29 #include <boost/thread/condition_variable.hpp> // TODO Remove |
|
c2dc924f1a63
removing threading out of the framework
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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|
30 |
| 0 | 31 namespace OrthancStone |
| 32 { | |
| 33 class LayeredSceneWidget::Renderers : public boost::noncopyable | |
| 34 { | |
| 35 private: | |
| 36 boost::mutex mutex_; | |
| 37 std::vector<ILayerRenderer*> renderers_; | |
| 38 std::vector<bool> assigned_; | |
| 39 | |
| 40 void Assign(size_t index, | |
| 41 ILayerRenderer* renderer) | |
| 42 { | |
| 43 if (index >= renderers_.size()) | |
| 44 { | |
| 45 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 46 } | |
| 47 | |
| 48 if (renderers_[index] != NULL) | |
| 49 { | |
| 50 delete renderers_[index]; | |
| 51 } | |
| 52 | |
| 53 renderers_[index] = renderer; | |
| 54 assigned_[index] = true; | |
| 55 } | |
| 56 | |
| 57 public: | |
| 58 Renderers(size_t size) | |
| 59 { | |
| 60 renderers_.resize(size); | |
| 61 assigned_.resize(size, false); | |
| 62 } | |
| 63 | |
| 64 ~Renderers() | |
| 65 { | |
| 66 for (size_t i = 0; i < renderers_.size(); i++) | |
| 67 { | |
| 68 Assign(i, NULL); | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 static void Merge(Renderers& target, | |
| 73 Renderers& source) | |
| 74 { | |
| 75 boost::mutex::scoped_lock lockSource(source.mutex_); | |
| 76 boost::mutex::scoped_lock lockTarget(target.mutex_); | |
| 77 | |
| 78 size_t count = target.renderers_.size(); | |
| 79 if (count != source.renderers_.size()) | |
| 80 { | |
| 81 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 82 } | |
| 83 | |
| 84 for (size_t i = 0; i < count; i++) | |
| 85 { | |
| 86 if (source.assigned_[i]) | |
| 87 { | |
| 88 target.Assign(i, source.renderers_[i]); // Transfers ownership | |
| 89 source.renderers_[i] = NULL; | |
| 90 source.assigned_[i] = false; | |
| 91 } | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 void SetRenderer(size_t index, | |
| 96 ILayerRenderer* renderer) // Takes ownership | |
| 97 { | |
| 98 boost::mutex::scoped_lock lock(mutex_); | |
| 99 Assign(index, renderer); | |
| 100 } | |
| 101 | |
| 102 bool RenderScene(CairoContext& context, | |
| 103 const ViewportGeometry& view) | |
| 104 { | |
| 105 boost::mutex::scoped_lock lock(mutex_); | |
| 106 | |
| 107 bool fullQuality = true; | |
| 108 | |
| 109 for (size_t i = 0; i < renderers_.size(); i++) | |
| 110 { | |
| 111 if (renderers_[i] != NULL && | |
| 112 !renderers_[i]->RenderLayer(context, view)) | |
| 113 { | |
| 114 return false; | |
| 115 } | |
| 116 | |
| 117 if (renderers_[i] != NULL && | |
| 118 !renderers_[i]->IsFullQuality()) | |
| 119 { | |
| 120 fullQuality = false; | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 if (!fullQuality) | |
| 125 { | |
| 126 double x, y; | |
| 127 view.MapDisplayToScene(x, y, static_cast<double>(view.GetDisplayWidth()) / 2.0, 10); | |
| 128 | |
| 129 cairo_t *cr = context.GetObject(); | |
| 130 cairo_translate(cr, x, y); | |
| 131 cairo_arc(cr, 0, 0, 5.0 / view.GetZoom(), 0, 2 * M_PI); | |
| 132 cairo_set_line_width(cr, 2.0 / view.GetZoom()); | |
| 133 cairo_set_source_rgb(cr, 1, 1, 1); | |
| 134 cairo_stroke_preserve(cr); | |
| 135 cairo_set_source_rgb(cr, 1, 0, 0); | |
| 136 cairo_fill(cr); | |
| 137 } | |
| 138 | |
| 139 return true; | |
| 140 } | |
| 141 | |
| 142 void SetLayerStyle(size_t index, | |
| 143 const RenderStyle& style) | |
| 144 { | |
| 145 boost::mutex::scoped_lock lock(mutex_); | |
| 146 | |
| 147 if (renderers_[index] != NULL) | |
| 148 { | |
| 149 renderers_[index]->SetLayerStyle(style); | |
| 150 } | |
| 151 } | |
| 152 }; | |
| 153 | |
| 154 | |
| 155 | |
| 156 class LayeredSceneWidget::PendingLayers : public boost::noncopyable | |
| 157 { | |
| 158 private: | |
| 159 boost::mutex mutex_; | |
| 160 boost::condition_variable elementAvailable_; | |
| 161 size_t layerCount_; | |
| 162 std::list<size_t> queue_; | |
| 163 std::vector<bool> layersToUpdate_; | |
| 164 bool continue_; | |
| 165 | |
| 166 void TagAllLayers() | |
| 167 { | |
| 168 queue_.clear(); | |
| 169 | |
| 170 for (unsigned int i = 0; i < layerCount_; i++) | |
| 171 { | |
| 172 queue_.push_back(i); | |
| 173 layersToUpdate_[i] = true; | |
| 174 } | |
| 175 | |
| 176 if (layerCount_ != 0) | |
| 177 { | |
| 178 elementAvailable_.notify_one(); | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 public: | |
| 183 PendingLayers() : | |
| 184 layerCount_(0), | |
| 185 continue_(true) | |
| 186 { | |
| 187 } | |
| 188 | |
| 189 void Stop() | |
| 190 { | |
| 191 continue_ = false; | |
| 192 elementAvailable_.notify_one(); | |
| 193 } | |
| 194 | |
| 195 void SetLayerCount(size_t count) | |
| 196 { | |
| 197 boost::mutex::scoped_lock lock(mutex_); | |
| 198 | |
| 199 layerCount_ = count; | |
| 200 layersToUpdate_.resize(count); | |
| 201 | |
| 202 TagAllLayers(); | |
| 203 } | |
| 204 | |
| 205 void InvalidateAllLayers() | |
| 206 { | |
| 207 boost::mutex::scoped_lock lock(mutex_); | |
| 208 TagAllLayers(); | |
| 209 } | |
| 210 | |
| 211 void InvalidateLayer(size_t layer) | |
| 212 { | |
| 213 boost::mutex::scoped_lock lock(mutex_); | |
| 214 | |
| 215 if (layer < layerCount_) | |
| 216 { | |
| 217 if (layersToUpdate_[layer]) | |
| 218 { | |
| 219 // The layer is already scheduled for update, ignore this | |
| 220 // invalidation | |
| 221 } | |
| 222 else | |
| 223 { | |
| 224 queue_.push_back(layer); | |
| 225 layersToUpdate_[layer] = true; | |
| 226 elementAvailable_.notify_one(); | |
| 227 } | |
| 228 } | |
| 229 } | |
| 230 | |
| 231 bool Dequeue(size_t& layer, | |
| 232 bool& isLast) | |
| 233 { | |
| 234 boost::mutex::scoped_lock lock(mutex_); | |
| 235 | |
| 236 // WARNING: Do NOT use "timed_wait" on condition variables, as | |
| 237 // sleeping is not properly supported by Boost for Google NaCl | |
| 238 while (queue_.empty() && | |
| 239 continue_) | |
| 240 { | |
| 241 elementAvailable_.wait(lock); | |
| 242 } | |
| 243 | |
| 244 if (!continue_) | |
| 245 { | |
| 246 return false; | |
| 247 } | |
| 248 | |
| 249 layer = queue_.front(); | |
| 250 layersToUpdate_[layer] = false; | |
| 251 queue_.pop_front(); | |
| 252 | |
| 253 isLast = queue_.empty(); | |
| 254 | |
| 255 return true; | |
| 256 } | |
| 257 }; | |
| 258 | |
| 259 | |
| 260 class LayeredSceneWidget::Layer : public ISliceableVolume::IChangeObserver | |
| 261 { | |
| 262 private: | |
| 263 boost::mutex mutex_; | |
| 264 std::auto_ptr<ILayerRendererFactory> factory_; | |
| 265 PendingLayers& layers_; | |
| 266 size_t index_; | |
| 267 std::auto_ptr<RenderStyle> style_; | |
| 268 | |
| 269 public: | |
| 270 Layer(ILayerRendererFactory* factory, | |
| 271 PendingLayers& layers, | |
| 272 size_t index) : | |
| 273 factory_(factory), | |
| 274 layers_(layers), | |
| 275 index_(index) | |
| 276 { | |
| 277 if (factory == NULL) | |
| 278 { | |
| 279 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 280 } | |
| 281 } | |
| 282 | |
| 283 virtual void NotifyChange(const OrthancStone::ISliceableVolume&) | |
| 284 { | |
| 285 layers_.InvalidateLayer(index_); | |
| 286 } | |
| 287 | |
| 288 void Start() | |
| 289 { | |
| 290 if (factory_->HasSourceVolume()) | |
| 291 { | |
| 292 factory_->GetSourceVolume().Register(*this); | |
| 293 } | |
| 294 } | |
| 295 | |
| 296 void Stop() | |
| 297 { | |
| 298 if (factory_->HasSourceVolume()) | |
| 299 { | |
| 300 factory_->GetSourceVolume().Unregister(*this); | |
| 301 } | |
| 302 } | |
| 303 | |
| 304 bool GetExtent(double& x1, | |
| 305 double& y1, | |
| 306 double& x2, | |
| 307 double& y2, | |
| 308 const SliceGeometry& displaySlice) | |
| 309 { | |
| 310 boost::mutex::scoped_lock lock(mutex_); | |
| 311 assert(factory_.get() != NULL); | |
| 312 return factory_->GetExtent(x1, y1, x2, y2, displaySlice); | |
| 313 } | |
| 314 | |
| 315 RenderStyle GetStyle() | |
| 316 { | |
| 317 boost::mutex::scoped_lock lock(mutex_); | |
| 318 | |
| 319 if (style_.get() == NULL) | |
| 320 { | |
| 321 return RenderStyle(); | |
| 322 } | |
| 323 else | |
| 324 { | |
| 325 return *style_; | |
| 326 } | |
| 327 } | |
| 328 | |
| 329 void SetStyle(const RenderStyle& style) | |
| 330 { | |
| 331 boost::mutex::scoped_lock lock(mutex_); | |
| 332 style_.reset(new RenderStyle(style)); | |
| 333 } | |
| 334 | |
| 335 | |
| 336 ILayerRenderer* CreateRenderer(const SliceGeometry& displaySlice) | |
| 337 { | |
| 338 boost::mutex::scoped_lock lock(mutex_); | |
| 339 assert(factory_.get() != NULL); | |
| 340 | |
| 341 std::auto_ptr<ILayerRenderer> renderer(factory_->CreateLayerRenderer(displaySlice)); | |
| 342 | |
| 343 if (renderer.get() != NULL && | |
| 344 style_.get() != NULL) | |
| 345 { | |
| 346 renderer->SetLayerStyle(*style_); | |
| 347 } | |
| 348 | |
| 349 return renderer.release(); | |
| 350 } | |
| 351 }; | |
| 352 | |
| 353 | |
| 354 | |
| 355 SliceGeometry LayeredSceneWidget::GetSlice() | |
| 356 { | |
| 357 boost::mutex::scoped_lock lock(sliceMutex_); | |
| 358 return slice_; | |
| 359 } | |
| 360 | |
| 361 | |
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362 void LayeredSceneWidget::UpdateContent() |
| 0 | 363 { |
| 364 size_t layer = 0; | |
| 365 bool isLast = true; | |
| 366 if (!pendingLayers_->Dequeue(layer, isLast)) | |
| 367 { | |
| 368 return; | |
| 369 } | |
| 370 | |
| 371 SliceGeometry slice = GetSlice(); | |
| 372 | |
| 373 std::auto_ptr<ILayerRenderer> renderer; | |
| 374 renderer.reset(layers_[layer]->CreateRenderer(slice)); | |
| 375 | |
| 376 if (renderer.get() != NULL) | |
| 377 { | |
| 378 pendingRenderers_->SetRenderer(layer, renderer.release()); | |
| 379 } | |
| 380 else | |
| 381 { | |
| 382 pendingRenderers_->SetRenderer(layer, NULL); | |
| 383 } | |
| 384 | |
| 385 if (isLast) | |
| 386 { | |
| 387 Renderers::Merge(*renderers_, *pendingRenderers_); | |
| 388 NotifyChange(); | |
| 389 } | |
| 44 | 390 |
| 391 // TODO Add sleep at this point | |
| 0 | 392 } |
| 393 | |
| 394 | |
| 395 bool LayeredSceneWidget::RenderScene(CairoContext& context, | |
| 396 const ViewportGeometry& view) | |
| 397 { | |
| 398 assert(IsStarted()); | |
| 399 return renderers_->RenderScene(context, view); | |
| 400 } | |
| 401 | |
| 402 | |
| 403 LayeredSceneWidget::LayeredSceneWidget() | |
| 404 { | |
| 405 pendingLayers_.reset(new PendingLayers); | |
| 406 SetBackgroundCleared(true); | |
| 407 } | |
| 408 | |
| 409 | |
| 410 LayeredSceneWidget::~LayeredSceneWidget() | |
| 411 { | |
| 412 for (size_t i = 0; i < layers_.size(); i++) | |
| 413 { | |
| 414 assert(layers_[i] != NULL); | |
| 415 delete layers_[i]; | |
| 416 } | |
| 417 } | |
| 418 | |
| 419 | |
| 420 void LayeredSceneWidget::GetSceneExtent(double& x1, | |
| 421 double& y1, | |
| 422 double& x2, | |
| 423 double& y2) | |
| 424 { | |
| 425 boost::mutex::scoped_lock lock(sliceMutex_); | |
| 426 | |
| 427 bool first = true; | |
| 428 | |
| 429 for (size_t i = 0; i < layers_.size(); i++) | |
| 430 { | |
| 431 double ax, ay, bx, by; | |
| 432 | |
| 433 assert(layers_[i] != NULL); | |
| 434 if (layers_[i]->GetExtent(ax, ay, bx, by, slice_)) | |
| 435 { | |
| 436 if (ax > bx) | |
| 437 { | |
| 438 std::swap(ax, bx); | |
| 439 } | |
| 440 | |
| 441 if (ay > by) | |
| 442 { | |
| 443 std::swap(ay, by); | |
| 444 } | |
| 445 | |
| 446 if (first) | |
| 447 { | |
| 448 x1 = ax; | |
| 449 y1 = ay; | |
| 450 x2 = bx; | |
| 451 y2 = by; | |
| 452 first = false; | |
| 453 } | |
| 454 else | |
| 455 { | |
| 456 x1 = std::min(x1, ax); | |
| 457 y1 = std::min(y1, ay); | |
| 458 x2 = std::max(x2, bx); | |
| 459 y2 = std::max(y2, by); | |
| 460 } | |
| 461 } | |
| 462 } | |
| 463 | |
| 464 if (first) | |
| 465 { | |
| 466 x1 = -1; | |
| 467 y1 = -1; | |
| 468 x2 = 1; | |
| 469 y2 = 1; | |
| 470 } | |
| 471 | |
| 472 // Ensure the extent is non-empty | |
| 473 if (x1 >= x2) | |
| 474 { | |
| 475 double tmp = x1; | |
| 476 x1 = tmp - 0.5; | |
| 477 x2 = tmp + 0.5; | |
| 478 } | |
| 479 | |
| 480 if (y1 >= y2) | |
| 481 { | |
| 482 double tmp = y1; | |
| 483 y1 = tmp - 0.5; | |
| 484 y2 = tmp + 0.5; | |
| 485 } | |
| 486 } | |
| 487 | |
| 488 | |
| 489 | |
| 490 ILayerRendererFactory& LayeredSceneWidget::AddLayer(size_t& layerIndex, | |
| 491 ILayerRendererFactory* factory) | |
| 492 { | |
| 493 if (IsStarted()) | |
| 494 { | |
| 495 // Start() has already been invoked | |
| 496 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 497 } | |
| 498 | |
| 499 layerIndex = layers_.size(); | |
| 500 layers_.push_back(new Layer(factory, *pendingLayers_, layers_.size())); | |
| 501 | |
| 502 return *factory; | |
| 503 } | |
| 504 | |
| 505 | |
| 506 void LayeredSceneWidget::AddLayer(ILayerRendererFactory* factory) | |
| 507 { | |
| 508 size_t layerIndex; // Ignored | |
| 509 AddLayer(layerIndex, factory); | |
| 510 } | |
| 511 | |
| 512 | |
| 513 RenderStyle LayeredSceneWidget::GetLayerStyle(size_t layer) | |
| 514 { | |
| 515 if (layer >= layers_.size()) | |
| 516 { | |
| 517 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 518 } | |
| 519 | |
| 520 return layers_[layer]->GetStyle(); | |
| 521 } | |
| 522 | |
| 523 | |
| 524 void LayeredSceneWidget::SetLayerStyle(size_t layer, | |
| 525 const RenderStyle& style) | |
| 526 { | |
| 527 if (layer >= layers_.size()) | |
| 528 { | |
| 529 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 530 } | |
| 531 | |
| 532 layers_[layer]->SetStyle(style); | |
| 533 | |
| 534 if (renderers_.get() != NULL) | |
| 535 { | |
| 536 renderers_->SetLayerStyle(layer, style); | |
| 537 } | |
| 538 | |
| 539 InvalidateLayer(layer); | |
| 540 } | |
| 541 | |
| 542 | |
| 543 | |
| 544 struct LayeredSceneWidget::SliceChangeFunctor | |
| 545 { | |
| 546 const SliceGeometry& slice_; | |
| 547 | |
| 548 SliceChangeFunctor(const SliceGeometry& slice) : | |
| 549 slice_(slice) | |
| 550 { | |
| 551 } | |
| 552 | |
| 553 void operator() (ISliceObserver& observer, | |
| 554 const LayeredSceneWidget& source) | |
| 555 { | |
| 556 observer.NotifySliceChange(source, slice_); | |
| 557 } | |
| 558 }; | |
| 559 | |
| 560 | |
| 561 void LayeredSceneWidget::SetSlice(const SliceGeometry& slice) | |
| 562 { | |
| 563 { | |
| 564 boost::mutex::scoped_lock lock(sliceMutex_); | |
| 565 slice_ = slice; | |
| 566 } | |
| 567 | |
| 568 InvalidateAllLayers(); | |
| 569 | |
| 570 SliceChangeFunctor functor(slice); | |
| 571 observers_.Notify(this, functor); | |
| 572 } | |
| 573 | |
| 574 | |
| 575 void LayeredSceneWidget::InvalidateLayer(unsigned int layer) | |
| 576 { | |
| 577 pendingLayers_->InvalidateLayer(layer); | |
| 578 //NotifyChange(); // TODO Understand why this makes the SDL engine not update the display subsequently | |
| 579 } | |
| 580 | |
| 581 | |
| 582 void LayeredSceneWidget::InvalidateAllLayers() | |
| 583 { | |
| 584 pendingLayers_->InvalidateAllLayers(); | |
| 585 //NotifyChange(); // TODO Understand why this makes the SDL engine not update the display subsequently | |
| 586 } | |
| 587 | |
| 588 | |
| 589 void LayeredSceneWidget::Start() | |
| 590 { | |
| 591 if (IsStarted()) | |
| 592 { | |
| 593 // Start() has already been invoked | |
| 594 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 595 } | |
| 596 | |
| 597 for (size_t i = 0; i < layers_.size(); i++) | |
| 598 { | |
| 599 layers_[i]->Start(); | |
| 600 } | |
| 601 | |
| 602 renderers_.reset(new Renderers(layers_.size())); | |
| 603 pendingRenderers_.reset(new Renderers(layers_.size())); | |
| 604 | |
| 605 pendingLayers_->SetLayerCount(layers_.size()); | |
| 606 | |
| 607 WorldSceneWidget::Start(); | |
| 608 } | |
| 609 | |
| 610 | |
| 611 void LayeredSceneWidget::Stop() | |
| 612 { | |
| 613 if (!IsStarted()) | |
| 614 { | |
| 615 // Stop() has already been invoked | |
| 616 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 617 } | |
| 618 | |
| 619 pendingLayers_->Stop(); | |
| 620 WorldSceneWidget::Stop(); | |
| 621 | |
| 622 renderers_.reset(NULL); | |
| 623 pendingRenderers_.reset(NULL); | |
| 624 | |
| 625 for (size_t i = 0; i < layers_.size(); i++) | |
| 626 { | |
| 627 layers_[i]->Stop(); | |
| 628 } | |
| 629 } | |
| 630 } |