Mercurial > hg > orthanc-stone
annotate Framework/Widgets/LayeredSceneWidget.cpp @ 40:7207a407bcd8
shared copyright with osimis
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 04 Jan 2017 16:37:42 +0100 |
| parents | ff1e935768e7 |
| children | 027418bd1517 |
| 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 | |
|
40
7207a407bcd8
shared copyright with osimis
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
16
diff
changeset
|
5 * Copyright (C) 2017 Osimis, Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU General Public License as | |
| 9 * published by the Free Software Foundation, either version 3 of the | |
| 10 * License, or (at your option) any later version. | |
| 11 * | |
| 12 * In addition, as a special exception, the copyright holders of this | |
| 13 * program give permission to link the code of its release with the | |
| 14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 15 * that use the same license as the "OpenSSL" library), and distribute | |
| 16 * the linked executables. You must obey the GNU General Public License | |
| 17 * in all respects for all of the code used other than "OpenSSL". If you | |
| 18 * modify file(s) with this exception, you may extend this exception to | |
| 19 * your version of the file(s), but you are not obligated to do so. If | |
| 20 * you do not wish to do so, delete this exception statement from your | |
| 21 * version. If you delete this exception statement from all source files | |
| 22 * in the program, then also delete it here. | |
| 23 * | |
| 24 * This program is distributed in the hope that it will be useful, but | |
| 25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 27 * General Public License for more details. | |
| 28 * | |
| 29 * You should have received a copy of the GNU General Public License | |
| 30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 31 **/ | |
| 32 | |
| 33 | |
| 34 #define _USE_MATH_DEFINES // To access M_PI in Visual Studio | |
| 35 #include <cmath> | |
| 36 | |
| 37 #include "LayeredSceneWidget.h" | |
| 38 | |
| 16 | 39 #include "../../Resources/Orthanc/Core/OrthancException.h" |
| 0 | 40 |
| 41 namespace OrthancStone | |
| 42 { | |
| 43 class LayeredSceneWidget::Renderers : public boost::noncopyable | |
| 44 { | |
| 45 private: | |
| 46 boost::mutex mutex_; | |
| 47 std::vector<ILayerRenderer*> renderers_; | |
| 48 std::vector<bool> assigned_; | |
| 49 | |
| 50 void Assign(size_t index, | |
| 51 ILayerRenderer* renderer) | |
| 52 { | |
| 53 if (index >= renderers_.size()) | |
| 54 { | |
| 55 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 56 } | |
| 57 | |
| 58 if (renderers_[index] != NULL) | |
| 59 { | |
| 60 delete renderers_[index]; | |
| 61 } | |
| 62 | |
| 63 renderers_[index] = renderer; | |
| 64 assigned_[index] = true; | |
| 65 } | |
| 66 | |
| 67 public: | |
| 68 Renderers(size_t size) | |
| 69 { | |
| 70 renderers_.resize(size); | |
| 71 assigned_.resize(size, false); | |
| 72 } | |
| 73 | |
| 74 ~Renderers() | |
| 75 { | |
| 76 for (size_t i = 0; i < renderers_.size(); i++) | |
| 77 { | |
| 78 Assign(i, NULL); | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 static void Merge(Renderers& target, | |
| 83 Renderers& source) | |
| 84 { | |
| 85 boost::mutex::scoped_lock lockSource(source.mutex_); | |
| 86 boost::mutex::scoped_lock lockTarget(target.mutex_); | |
| 87 | |
| 88 size_t count = target.renderers_.size(); | |
| 89 if (count != source.renderers_.size()) | |
| 90 { | |
| 91 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 92 } | |
| 93 | |
| 94 for (size_t i = 0; i < count; i++) | |
| 95 { | |
| 96 if (source.assigned_[i]) | |
| 97 { | |
| 98 target.Assign(i, source.renderers_[i]); // Transfers ownership | |
| 99 source.renderers_[i] = NULL; | |
| 100 source.assigned_[i] = false; | |
| 101 } | |
| 102 } | |
| 103 } | |
| 104 | |
| 105 void SetRenderer(size_t index, | |
| 106 ILayerRenderer* renderer) // Takes ownership | |
| 107 { | |
| 108 boost::mutex::scoped_lock lock(mutex_); | |
| 109 Assign(index, renderer); | |
| 110 } | |
| 111 | |
| 112 bool RenderScene(CairoContext& context, | |
| 113 const ViewportGeometry& view) | |
| 114 { | |
| 115 boost::mutex::scoped_lock lock(mutex_); | |
| 116 | |
| 117 bool fullQuality = true; | |
| 118 | |
| 119 for (size_t i = 0; i < renderers_.size(); i++) | |
| 120 { | |
| 121 if (renderers_[i] != NULL && | |
| 122 !renderers_[i]->RenderLayer(context, view)) | |
| 123 { | |
| 124 return false; | |
| 125 } | |
| 126 | |
| 127 if (renderers_[i] != NULL && | |
| 128 !renderers_[i]->IsFullQuality()) | |
| 129 { | |
| 130 fullQuality = false; | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 if (!fullQuality) | |
| 135 { | |
| 136 double x, y; | |
| 137 view.MapDisplayToScene(x, y, static_cast<double>(view.GetDisplayWidth()) / 2.0, 10); | |
| 138 | |
| 139 cairo_t *cr = context.GetObject(); | |
| 140 cairo_translate(cr, x, y); | |
| 141 cairo_arc(cr, 0, 0, 5.0 / view.GetZoom(), 0, 2 * M_PI); | |
| 142 cairo_set_line_width(cr, 2.0 / view.GetZoom()); | |
| 143 cairo_set_source_rgb(cr, 1, 1, 1); | |
| 144 cairo_stroke_preserve(cr); | |
| 145 cairo_set_source_rgb(cr, 1, 0, 0); | |
| 146 cairo_fill(cr); | |
| 147 } | |
| 148 | |
| 149 return true; | |
| 150 } | |
| 151 | |
| 152 void SetLayerStyle(size_t index, | |
| 153 const RenderStyle& style) | |
| 154 { | |
| 155 boost::mutex::scoped_lock lock(mutex_); | |
| 156 | |
| 157 if (renderers_[index] != NULL) | |
| 158 { | |
| 159 renderers_[index]->SetLayerStyle(style); | |
| 160 } | |
| 161 } | |
| 162 }; | |
| 163 | |
| 164 | |
| 165 | |
| 166 class LayeredSceneWidget::PendingLayers : public boost::noncopyable | |
| 167 { | |
| 168 private: | |
| 169 boost::mutex mutex_; | |
| 170 boost::condition_variable elementAvailable_; | |
| 171 size_t layerCount_; | |
| 172 std::list<size_t> queue_; | |
| 173 std::vector<bool> layersToUpdate_; | |
| 174 bool continue_; | |
| 175 | |
| 176 void TagAllLayers() | |
| 177 { | |
| 178 queue_.clear(); | |
| 179 | |
| 180 for (unsigned int i = 0; i < layerCount_; i++) | |
| 181 { | |
| 182 queue_.push_back(i); | |
| 183 layersToUpdate_[i] = true; | |
| 184 } | |
| 185 | |
| 186 if (layerCount_ != 0) | |
| 187 { | |
| 188 elementAvailable_.notify_one(); | |
| 189 } | |
| 190 } | |
| 191 | |
| 192 public: | |
| 193 PendingLayers() : | |
| 194 layerCount_(0), | |
| 195 continue_(true) | |
| 196 { | |
| 197 } | |
| 198 | |
| 199 void Stop() | |
| 200 { | |
| 201 continue_ = false; | |
| 202 elementAvailable_.notify_one(); | |
| 203 } | |
| 204 | |
| 205 void SetLayerCount(size_t count) | |
| 206 { | |
| 207 boost::mutex::scoped_lock lock(mutex_); | |
| 208 | |
| 209 layerCount_ = count; | |
| 210 layersToUpdate_.resize(count); | |
| 211 | |
| 212 TagAllLayers(); | |
| 213 } | |
| 214 | |
| 215 void InvalidateAllLayers() | |
| 216 { | |
| 217 boost::mutex::scoped_lock lock(mutex_); | |
| 218 TagAllLayers(); | |
| 219 } | |
| 220 | |
| 221 void InvalidateLayer(size_t layer) | |
| 222 { | |
| 223 boost::mutex::scoped_lock lock(mutex_); | |
| 224 | |
| 225 if (layer < layerCount_) | |
| 226 { | |
| 227 if (layersToUpdate_[layer]) | |
| 228 { | |
| 229 // The layer is already scheduled for update, ignore this | |
| 230 // invalidation | |
| 231 } | |
| 232 else | |
| 233 { | |
| 234 queue_.push_back(layer); | |
| 235 layersToUpdate_[layer] = true; | |
| 236 elementAvailable_.notify_one(); | |
| 237 } | |
| 238 } | |
| 239 } | |
| 240 | |
| 241 bool Dequeue(size_t& layer, | |
| 242 bool& isLast) | |
| 243 { | |
| 244 boost::mutex::scoped_lock lock(mutex_); | |
| 245 | |
| 246 // WARNING: Do NOT use "timed_wait" on condition variables, as | |
| 247 // sleeping is not properly supported by Boost for Google NaCl | |
| 248 while (queue_.empty() && | |
| 249 continue_) | |
| 250 { | |
| 251 elementAvailable_.wait(lock); | |
| 252 } | |
| 253 | |
| 254 if (!continue_) | |
| 255 { | |
| 256 return false; | |
| 257 } | |
| 258 | |
| 259 layer = queue_.front(); | |
| 260 layersToUpdate_[layer] = false; | |
| 261 queue_.pop_front(); | |
| 262 | |
| 263 isLast = queue_.empty(); | |
| 264 | |
| 265 return true; | |
| 266 } | |
| 267 }; | |
| 268 | |
| 269 | |
| 270 class LayeredSceneWidget::Layer : public ISliceableVolume::IChangeObserver | |
| 271 { | |
| 272 private: | |
| 273 boost::mutex mutex_; | |
| 274 std::auto_ptr<ILayerRendererFactory> factory_; | |
| 275 PendingLayers& layers_; | |
| 276 size_t index_; | |
| 277 std::auto_ptr<RenderStyle> style_; | |
| 278 | |
| 279 public: | |
| 280 Layer(ILayerRendererFactory* factory, | |
| 281 PendingLayers& layers, | |
| 282 size_t index) : | |
| 283 factory_(factory), | |
| 284 layers_(layers), | |
| 285 index_(index) | |
| 286 { | |
| 287 if (factory == NULL) | |
| 288 { | |
| 289 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 290 } | |
| 291 } | |
| 292 | |
| 293 virtual void NotifyChange(const OrthancStone::ISliceableVolume&) | |
| 294 { | |
| 295 layers_.InvalidateLayer(index_); | |
| 296 } | |
| 297 | |
| 298 void Start() | |
| 299 { | |
| 300 if (factory_->HasSourceVolume()) | |
| 301 { | |
| 302 factory_->GetSourceVolume().Register(*this); | |
| 303 } | |
| 304 } | |
| 305 | |
| 306 void Stop() | |
| 307 { | |
| 308 if (factory_->HasSourceVolume()) | |
| 309 { | |
| 310 factory_->GetSourceVolume().Unregister(*this); | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 bool GetExtent(double& x1, | |
| 315 double& y1, | |
| 316 double& x2, | |
| 317 double& y2, | |
| 318 const SliceGeometry& displaySlice) | |
| 319 { | |
| 320 boost::mutex::scoped_lock lock(mutex_); | |
| 321 assert(factory_.get() != NULL); | |
| 322 return factory_->GetExtent(x1, y1, x2, y2, displaySlice); | |
| 323 } | |
| 324 | |
| 325 RenderStyle GetStyle() | |
| 326 { | |
| 327 boost::mutex::scoped_lock lock(mutex_); | |
| 328 | |
| 329 if (style_.get() == NULL) | |
| 330 { | |
| 331 return RenderStyle(); | |
| 332 } | |
| 333 else | |
| 334 { | |
| 335 return *style_; | |
| 336 } | |
| 337 } | |
| 338 | |
| 339 void SetStyle(const RenderStyle& style) | |
| 340 { | |
| 341 boost::mutex::scoped_lock lock(mutex_); | |
| 342 style_.reset(new RenderStyle(style)); | |
| 343 } | |
| 344 | |
| 345 | |
| 346 ILayerRenderer* CreateRenderer(const SliceGeometry& displaySlice) | |
| 347 { | |
| 348 boost::mutex::scoped_lock lock(mutex_); | |
| 349 assert(factory_.get() != NULL); | |
| 350 | |
| 351 std::auto_ptr<ILayerRenderer> renderer(factory_->CreateLayerRenderer(displaySlice)); | |
| 352 | |
| 353 if (renderer.get() != NULL && | |
| 354 style_.get() != NULL) | |
| 355 { | |
| 356 renderer->SetLayerStyle(*style_); | |
| 357 } | |
| 358 | |
| 359 return renderer.release(); | |
| 360 } | |
| 361 }; | |
| 362 | |
| 363 | |
| 364 | |
| 365 SliceGeometry LayeredSceneWidget::GetSlice() | |
| 366 { | |
| 367 boost::mutex::scoped_lock lock(sliceMutex_); | |
| 368 return slice_; | |
| 369 } | |
| 370 | |
| 371 | |
| 372 void LayeredSceneWidget::UpdateStep() | |
| 373 { | |
| 374 size_t layer = 0; | |
| 375 bool isLast = true; | |
| 376 if (!pendingLayers_->Dequeue(layer, isLast)) | |
| 377 { | |
| 378 return; | |
| 379 } | |
| 380 | |
| 381 SliceGeometry slice = GetSlice(); | |
| 382 | |
| 383 std::auto_ptr<ILayerRenderer> renderer; | |
| 384 renderer.reset(layers_[layer]->CreateRenderer(slice)); | |
| 385 | |
| 386 if (renderer.get() != NULL) | |
| 387 { | |
| 388 pendingRenderers_->SetRenderer(layer, renderer.release()); | |
| 389 } | |
| 390 else | |
| 391 { | |
| 392 pendingRenderers_->SetRenderer(layer, NULL); | |
| 393 } | |
| 394 | |
| 395 if (isLast) | |
| 396 { | |
| 397 Renderers::Merge(*renderers_, *pendingRenderers_); | |
| 398 NotifyChange(); | |
| 399 } | |
| 400 } | |
| 401 | |
| 402 | |
| 403 bool LayeredSceneWidget::RenderScene(CairoContext& context, | |
| 404 const ViewportGeometry& view) | |
| 405 { | |
| 406 assert(IsStarted()); | |
| 407 return renderers_->RenderScene(context, view); | |
| 408 } | |
| 409 | |
| 410 | |
| 411 LayeredSceneWidget::LayeredSceneWidget() | |
| 412 { | |
| 413 pendingLayers_.reset(new PendingLayers); | |
| 414 SetBackgroundCleared(true); | |
| 415 } | |
| 416 | |
| 417 | |
| 418 LayeredSceneWidget::~LayeredSceneWidget() | |
| 419 { | |
| 420 for (size_t i = 0; i < layers_.size(); i++) | |
| 421 { | |
| 422 assert(layers_[i] != NULL); | |
| 423 delete layers_[i]; | |
| 424 } | |
| 425 } | |
| 426 | |
| 427 | |
| 428 void LayeredSceneWidget::GetSceneExtent(double& x1, | |
| 429 double& y1, | |
| 430 double& x2, | |
| 431 double& y2) | |
| 432 { | |
| 433 boost::mutex::scoped_lock lock(sliceMutex_); | |
| 434 | |
| 435 bool first = true; | |
| 436 | |
| 437 for (size_t i = 0; i < layers_.size(); i++) | |
| 438 { | |
| 439 double ax, ay, bx, by; | |
| 440 | |
| 441 assert(layers_[i] != NULL); | |
| 442 if (layers_[i]->GetExtent(ax, ay, bx, by, slice_)) | |
| 443 { | |
| 444 if (ax > bx) | |
| 445 { | |
| 446 std::swap(ax, bx); | |
| 447 } | |
| 448 | |
| 449 if (ay > by) | |
| 450 { | |
| 451 std::swap(ay, by); | |
| 452 } | |
| 453 | |
| 454 if (first) | |
| 455 { | |
| 456 x1 = ax; | |
| 457 y1 = ay; | |
| 458 x2 = bx; | |
| 459 y2 = by; | |
| 460 first = false; | |
| 461 } | |
| 462 else | |
| 463 { | |
| 464 x1 = std::min(x1, ax); | |
| 465 y1 = std::min(y1, ay); | |
| 466 x2 = std::max(x2, bx); | |
| 467 y2 = std::max(y2, by); | |
| 468 } | |
| 469 } | |
| 470 } | |
| 471 | |
| 472 if (first) | |
| 473 { | |
| 474 x1 = -1; | |
| 475 y1 = -1; | |
| 476 x2 = 1; | |
| 477 y2 = 1; | |
| 478 } | |
| 479 | |
| 480 // Ensure the extent is non-empty | |
| 481 if (x1 >= x2) | |
| 482 { | |
| 483 double tmp = x1; | |
| 484 x1 = tmp - 0.5; | |
| 485 x2 = tmp + 0.5; | |
| 486 } | |
| 487 | |
| 488 if (y1 >= y2) | |
| 489 { | |
| 490 double tmp = y1; | |
| 491 y1 = tmp - 0.5; | |
| 492 y2 = tmp + 0.5; | |
| 493 } | |
| 494 } | |
| 495 | |
| 496 | |
| 497 | |
| 498 ILayerRendererFactory& LayeredSceneWidget::AddLayer(size_t& layerIndex, | |
| 499 ILayerRendererFactory* factory) | |
| 500 { | |
| 501 if (IsStarted()) | |
| 502 { | |
| 503 // Start() has already been invoked | |
| 504 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 505 } | |
| 506 | |
| 507 layerIndex = layers_.size(); | |
| 508 layers_.push_back(new Layer(factory, *pendingLayers_, layers_.size())); | |
| 509 | |
| 510 return *factory; | |
| 511 } | |
| 512 | |
| 513 | |
| 514 void LayeredSceneWidget::AddLayer(ILayerRendererFactory* factory) | |
| 515 { | |
| 516 size_t layerIndex; // Ignored | |
| 517 AddLayer(layerIndex, factory); | |
| 518 } | |
| 519 | |
| 520 | |
| 521 RenderStyle LayeredSceneWidget::GetLayerStyle(size_t layer) | |
| 522 { | |
| 523 if (layer >= layers_.size()) | |
| 524 { | |
| 525 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 526 } | |
| 527 | |
| 528 return layers_[layer]->GetStyle(); | |
| 529 } | |
| 530 | |
| 531 | |
| 532 void LayeredSceneWidget::SetLayerStyle(size_t layer, | |
| 533 const RenderStyle& style) | |
| 534 { | |
| 535 if (layer >= layers_.size()) | |
| 536 { | |
| 537 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 538 } | |
| 539 | |
| 540 layers_[layer]->SetStyle(style); | |
| 541 | |
| 542 if (renderers_.get() != NULL) | |
| 543 { | |
| 544 renderers_->SetLayerStyle(layer, style); | |
| 545 } | |
| 546 | |
| 547 InvalidateLayer(layer); | |
| 548 } | |
| 549 | |
| 550 | |
| 551 | |
| 552 struct LayeredSceneWidget::SliceChangeFunctor | |
| 553 { | |
| 554 const SliceGeometry& slice_; | |
| 555 | |
| 556 SliceChangeFunctor(const SliceGeometry& slice) : | |
| 557 slice_(slice) | |
| 558 { | |
| 559 } | |
| 560 | |
| 561 void operator() (ISliceObserver& observer, | |
| 562 const LayeredSceneWidget& source) | |
| 563 { | |
| 564 observer.NotifySliceChange(source, slice_); | |
| 565 } | |
| 566 }; | |
| 567 | |
| 568 | |
| 569 void LayeredSceneWidget::SetSlice(const SliceGeometry& slice) | |
| 570 { | |
| 571 { | |
| 572 boost::mutex::scoped_lock lock(sliceMutex_); | |
| 573 slice_ = slice; | |
| 574 } | |
| 575 | |
| 576 InvalidateAllLayers(); | |
| 577 | |
| 578 SliceChangeFunctor functor(slice); | |
| 579 observers_.Notify(this, functor); | |
| 580 } | |
| 581 | |
| 582 | |
| 583 void LayeredSceneWidget::InvalidateLayer(unsigned int layer) | |
| 584 { | |
| 585 pendingLayers_->InvalidateLayer(layer); | |
| 586 //NotifyChange(); // TODO Understand why this makes the SDL engine not update the display subsequently | |
| 587 } | |
| 588 | |
| 589 | |
| 590 void LayeredSceneWidget::InvalidateAllLayers() | |
| 591 { | |
| 592 pendingLayers_->InvalidateAllLayers(); | |
| 593 //NotifyChange(); // TODO Understand why this makes the SDL engine not update the display subsequently | |
| 594 } | |
| 595 | |
| 596 | |
| 597 void LayeredSceneWidget::Start() | |
| 598 { | |
| 599 if (IsStarted()) | |
| 600 { | |
| 601 // Start() has already been invoked | |
| 602 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 603 } | |
| 604 | |
| 605 for (size_t i = 0; i < layers_.size(); i++) | |
| 606 { | |
| 607 layers_[i]->Start(); | |
| 608 } | |
| 609 | |
| 610 renderers_.reset(new Renderers(layers_.size())); | |
| 611 pendingRenderers_.reset(new Renderers(layers_.size())); | |
| 612 | |
| 613 pendingLayers_->SetLayerCount(layers_.size()); | |
| 614 | |
| 615 WorldSceneWidget::Start(); | |
| 616 } | |
| 617 | |
| 618 | |
| 619 void LayeredSceneWidget::Stop() | |
| 620 { | |
| 621 if (!IsStarted()) | |
| 622 { | |
| 623 // Stop() has already been invoked | |
| 624 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 625 } | |
| 626 | |
| 627 pendingLayers_->Stop(); | |
| 628 WorldSceneWidget::Stop(); | |
| 629 | |
| 630 renderers_.reset(NULL); | |
| 631 pendingRenderers_.reset(NULL); | |
| 632 | |
| 633 for (size_t i = 0; i < layers_.size(); i++) | |
| 634 { | |
| 635 layers_[i]->Stop(); | |
| 636 } | |
| 637 } | |
| 638 } |