Mercurial > hg > orthanc-stone
annotate Framework/Widgets/LayerWidget.cpp @ 97:d18dcc963930 wasm
separation of the renderers vs. viewport slice
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 30 May 2017 14:09:11 +0200 |
| parents | f8bce1bebe01 |
| children | efd9ef2b67f1 |
| rev | line source |
|---|---|
| 66 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 5 * Copyright (C) 2017 Osimis, Belgium | |
| 6 * | |
| 7 * This program is free software: you can redistribute it and/or | |
| 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. | |
| 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 | |
| 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 | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "LayerWidget.h" | |
| 23 | |
| 24 #include "../../Resources/Orthanc/Core/Logging.h" | |
| 85 | 25 #include "../Layers/MissingLayerRenderer.h" |
| 26 | |
| 27 static const double THIN_SLICE_THICKNESS = 100.0 * std::numeric_limits<double>::epsilon(); | |
| 66 | 28 |
| 29 namespace OrthancStone | |
| 30 { | |
| 31 class LayerWidget::Scene : public boost::noncopyable | |
| 32 { | |
| 33 private: | |
| 34 SliceGeometry slice_; | |
| 35 size_t countMissing_; | |
| 36 std::vector<ILayerRenderer*> renderers_; | |
| 37 | |
| 38 void DeleteLayer(size_t index) | |
| 39 { | |
| 40 if (index >= renderers_.size()) | |
| 41 { | |
| 42 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 43 } | |
| 44 | |
| 45 assert(countMissing_ <= renderers_.size()); | |
| 46 | |
| 47 if (renderers_[index] != NULL) | |
| 48 { | |
| 49 assert(countMissing_ < renderers_.size()); | |
| 50 delete renderers_[index]; | |
| 51 renderers_[index] = NULL; | |
| 52 countMissing_++; | |
| 53 } | |
| 54 } | |
| 55 | |
| 56 public: | |
| 57 Scene(const SliceGeometry& slice, | |
| 58 size_t countLayers) : | |
| 59 slice_(slice), | |
| 60 countMissing_(countLayers), | |
| 61 renderers_(countLayers, NULL) | |
| 62 { | |
| 63 } | |
| 64 | |
| 65 ~Scene() | |
| 66 { | |
| 67 for (size_t i = 0; i < renderers_.size(); i++) | |
| 68 { | |
| 69 DeleteLayer(i); | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 void SetLayer(size_t index, | |
| 74 ILayerRenderer* renderer) // Takes ownership | |
| 75 { | |
| 76 if (renderer == NULL) | |
| 77 { | |
| 78 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 79 } | |
| 80 | |
| 81 DeleteLayer(index); | |
| 82 | |
| 83 renderers_[index] = renderer; | |
| 84 countMissing_--; | |
| 85 } | |
| 86 | |
| 87 const SliceGeometry& GetSlice() const | |
| 88 { | |
| 89 return slice_; | |
| 90 } | |
| 91 | |
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92 bool HasRenderer(size_t index) |
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93 { |
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94 return renderers_[index] != NULL; |
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95 } |
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96 |
| 66 | 97 bool IsComplete() const |
| 98 { | |
| 99 return countMissing_ == 0; | |
| 100 } | |
| 101 | |
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102 unsigned int GetCountMissing() const |
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103 { |
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104 return countMissing_; |
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105 } |
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106 |
| 66 | 107 bool RenderScene(CairoContext& context, |
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108 const ViewportGeometry& view, |
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109 const SliceGeometry& viewportSlice) |
| 66 | 110 { |
| 111 bool fullQuality = true; | |
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112 cairo_t *cr = context.GetObject(); |
| 66 | 113 |
| 114 for (size_t i = 0; i < renderers_.size(); i++) | |
| 115 { | |
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116 if (renderers_[i] != NULL) |
| 66 | 117 { |
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118 const SliceGeometry& frameSlice = renderers_[i]->GetLayerSlice(); |
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119 |
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120 double x0, y0, x1, y1, x2, y2; |
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121 viewportSlice.ProjectPoint(x0, y0, frameSlice.GetOrigin()); |
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122 viewportSlice.ProjectPoint(x1, y1, frameSlice.GetOrigin() + frameSlice.GetAxisX()); |
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123 viewportSlice.ProjectPoint(x2, y2, frameSlice.GetOrigin() + frameSlice.GetAxisY()); |
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124 |
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125 /** |
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126 * Now we solve the system of linear equations Ax + b = x', given: |
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127 * A [0 ; 0] + b = [x0 ; y0] |
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128 * A [1 ; 0] + b = [x1 ; y1] |
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129 * A [0 ; 1] + b = [x2 ; y2] |
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130 * <=> |
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131 * b = [x0 ; y0] |
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132 * A [1 ; 0] = [x1 ; y1] - b = [x1 - x0 ; y1 - y0] |
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133 * A [0 ; 1] = [x2 ; y2] - b = [x2 - x0 ; y2 - y0] |
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134 * <=> |
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135 * b = [x0 ; y0] |
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136 * [a11 ; a21] = [x1 - x0 ; y1 - y0] |
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137 * [a12 ; a22] = [x2 - x0 ; y2 - y0] |
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138 **/ |
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139 |
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140 cairo_matrix_t transform; |
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141 cairo_matrix_init(&transform, x1 - x0, y1 - y0, x2 - x0, y2 - y0, x0, y0); |
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142 |
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143 cairo_save(cr); |
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144 cairo_transform(cr, &transform); |
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145 |
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146 if (!renderers_[i]->RenderLayer(context, view)) |
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147 { |
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148 cairo_restore(cr); |
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149 return false; |
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150 } |
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151 |
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152 cairo_restore(cr); |
| 66 | 153 } |
| 154 | |
| 155 if (renderers_[i] != NULL && | |
| 156 !renderers_[i]->IsFullQuality()) | |
| 157 { | |
| 158 fullQuality = false; | |
| 159 } | |
| 160 } | |
| 161 | |
| 162 if (!fullQuality) | |
| 163 { | |
| 164 double x, y; | |
| 165 view.MapDisplayToScene(x, y, static_cast<double>(view.GetDisplayWidth()) / 2.0, 10); | |
| 166 | |
| 167 cairo_translate(cr, x, y); | |
| 95 | 168 |
| 169 #if 1 | |
| 170 double s = 5.0 / view.GetZoom(); | |
| 171 cairo_rectangle(cr, -s, -s, 2.0 * s, 2.0 * s); | |
| 172 #else | |
| 173 // TODO Drawing circles makes WebAssembly crash! | |
| 66 | 174 cairo_arc(cr, 0, 0, 5.0 / view.GetZoom(), 0, 2 * M_PI); |
| 95 | 175 #endif |
| 176 | |
| 66 | 177 cairo_set_line_width(cr, 2.0 / view.GetZoom()); |
| 178 cairo_set_source_rgb(cr, 1, 1, 1); | |
| 179 cairo_stroke_preserve(cr); | |
| 95 | 180 cairo_set_source_rgb(cr, 1, 0, 0); |
| 66 | 181 cairo_fill(cr); |
| 182 } | |
| 183 | |
| 184 return true; | |
| 185 } | |
| 186 | |
| 187 void SetLayerStyle(size_t index, | |
| 188 const RenderStyle& style) | |
| 189 { | |
| 190 if (renderers_[index] != NULL) | |
| 191 { | |
| 192 renderers_[index]->SetLayerStyle(style); | |
| 193 } | |
| 194 } | |
| 195 }; | |
| 196 | |
| 197 | |
| 198 bool LayerWidget::LookupLayer(size_t& index /* out */, | |
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199 const ILayerSource& layer) const |
| 66 | 200 { |
| 201 LayersIndex::const_iterator found = layersIndex_.find(&layer); | |
| 202 | |
| 203 if (found == layersIndex_.end()) | |
| 204 { | |
| 205 return false; | |
| 206 } | |
| 207 else | |
| 208 { | |
| 209 index = found->second; | |
| 210 assert(index < layers_.size() && | |
| 211 layers_[index] == &layer); | |
| 212 return true; | |
| 213 } | |
| 214 } | |
| 215 | |
| 85 | 216 |
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217 void LayerWidget::GetLayerExtent(Extent& extent, |
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218 ILayerSource& source) const |
| 85 | 219 { |
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220 extent.Reset(); |
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221 |
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222 std::vector<Vector> points; |
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223 if (source.GetExtent(points, slice_)) |
| 85 | 224 { |
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225 for (size_t i = 0; i < points.size(); i++) |
| 85 | 226 { |
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227 double x, y; |
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228 slice_.ProjectPoint(x, y, points[i]); |
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229 extent.AddPoint(x, y); |
| 85 | 230 } |
| 231 } | |
| 232 } | |
| 233 | |
| 66 | 234 |
| 235 void LayerWidget::GetSceneExtent(double& x1, | |
| 236 double& y1, | |
| 237 double& x2, | |
| 238 double& y2) | |
| 239 { | |
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240 Extent sceneExtent; |
| 66 | 241 |
| 242 for (size_t i = 0; i < layers_.size(); i++) | |
| 243 { | |
| 244 double ax, ay, bx, by; | |
| 245 | |
| 246 assert(layers_[i] != NULL); | |
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247 Extent layerExtent; |
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248 GetLayerExtent(layerExtent, *layers_[i]); |
| 66 | 249 |
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250 sceneExtent.Union(layerExtent); |
| 66 | 251 } |
| 252 | |
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253 if (sceneExtent.IsEmpty()) |
| 66 | 254 { |
| 255 // Set a default extent of (-1,-1) -> (0,0) | |
| 256 x1 = -1; | |
| 257 y1 = -1; | |
| 258 x2 = 1; | |
| 259 y2 = 1; | |
| 260 } | |
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261 else |
| 66 | 262 { |
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263 x1 = sceneExtent.GetX1(); |
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264 y1 = sceneExtent.GetY1(); |
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265 x2 = sceneExtent.GetX2(); |
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266 y2 = sceneExtent.GetY2(); |
| 66 | 267 |
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268 // Ensure the extent is non-empty |
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269 if (x1 >= x2) |
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270 { |
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271 double tmp = x1; |
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272 x1 = tmp - 0.5; |
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273 x2 = tmp + 0.5; |
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274 } |
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275 |
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276 if (y1 >= y2) |
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277 { |
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278 double tmp = y1; |
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279 y1 = tmp - 0.5; |
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280 y2 = tmp + 0.5; |
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281 } |
| 66 | 282 } |
| 283 } | |
| 284 | |
| 285 | |
| 286 bool LayerWidget::RenderScene(CairoContext& context, | |
| 287 const ViewportGeometry& view) | |
| 288 { | |
| 289 if (currentScene_.get() != NULL) | |
| 290 { | |
|
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291 return currentScene_->RenderScene(context, view, slice_); |
| 66 | 292 } |
| 293 else | |
| 294 { | |
| 295 return true; | |
| 296 } | |
| 297 } | |
| 298 | |
| 299 | |
| 300 void LayerWidget::ResetPendingScene() | |
| 301 { | |
| 302 pendingScene_.reset(new Scene(slice_, layers_.size())); | |
| 303 } | |
| 304 | |
| 305 | |
| 306 void LayerWidget::UpdateLayer(size_t index, | |
| 307 ILayerRenderer* renderer, | |
| 77 | 308 const Slice& slice) |
| 66 | 309 { |
|
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310 LOG(INFO) << "Updating layer " << index; |
| 66 | 311 |
| 312 std::auto_ptr<ILayerRenderer> tmp(renderer); | |
| 313 | |
| 314 if (renderer == NULL) | |
| 315 { | |
| 316 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 317 } | |
| 318 | |
| 319 if (index >= layers_.size()) | |
| 320 { | |
| 321 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 322 } | |
| 323 | |
| 324 assert(layers_.size() == styles_.size()); | |
| 325 renderer->SetLayerStyle(styles_[index]); | |
| 326 | |
| 327 if (currentScene_.get() != NULL && | |
| 78 | 328 slice.ContainsPlane(currentScene_->GetSlice())) |
| 66 | 329 { |
| 330 currentScene_->SetLayer(index, tmp.release()); | |
| 331 NotifyChange(); | |
| 332 } | |
| 333 else if (pendingScene_.get() != NULL && | |
| 78 | 334 slice.ContainsPlane(pendingScene_->GetSlice())) |
| 66 | 335 { |
| 336 pendingScene_->SetLayer(index, tmp.release()); | |
| 337 | |
| 338 if (currentScene_.get() == NULL || | |
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339 !currentScene_->IsComplete() || |
| 66 | 340 pendingScene_->IsComplete()) |
| 341 { | |
| 342 currentScene_ = pendingScene_; | |
| 343 NotifyChange(); | |
| 344 } | |
| 345 } | |
| 346 } | |
| 347 | |
| 348 | |
| 349 LayerWidget::LayerWidget() : | |
| 78 | 350 started_(false) |
| 66 | 351 { |
| 352 SetBackgroundCleared(true); | |
| 353 } | |
| 354 | |
| 355 | |
| 356 LayerWidget::~LayerWidget() | |
| 357 { | |
| 358 for (size_t i = 0; i < layers_.size(); i++) | |
| 359 { | |
| 360 delete layers_[i]; | |
| 361 } | |
| 362 } | |
| 363 | |
| 364 | |
| 365 size_t LayerWidget::AddLayer(ILayerSource* layer) // Takes ownership | |
| 366 { | |
| 367 if (layer == NULL) | |
| 368 { | |
| 369 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 370 } | |
| 371 | |
| 372 size_t index = layers_.size(); | |
| 373 layers_.push_back(layer); | |
| 374 styles_.push_back(RenderStyle()); | |
| 375 layersIndex_[layer] = index; | |
| 376 | |
| 377 ResetPendingScene(); | |
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378 layer->Register(*this); |
| 66 | 379 |
| 380 return index; | |
| 381 } | |
| 382 | |
| 383 | |
| 384 void LayerWidget::SetLayerStyle(size_t layer, | |
| 385 const RenderStyle& style) | |
| 386 { | |
| 387 if (layer >= layers_.size()) | |
| 388 { | |
| 389 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 390 } | |
| 391 | |
| 392 assert(layers_.size() == styles_.size()); | |
| 393 styles_[layer] = style; | |
| 394 | |
| 395 if (currentScene_.get() != NULL) | |
| 396 { | |
| 397 currentScene_->SetLayerStyle(layer, style); | |
| 398 } | |
| 399 | |
| 400 if (pendingScene_.get() != NULL) | |
| 401 { | |
| 402 pendingScene_->SetLayerStyle(layer, style); | |
| 403 } | |
| 404 | |
| 405 NotifyChange(); | |
| 406 } | |
| 407 | |
| 408 | |
| 78 | 409 void LayerWidget::SetSlice(const SliceGeometry& slice) |
| 66 | 410 { |
|
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411 LOG(INFO) << "Setting slice origin: (" << slice.GetOrigin()[0] |
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412 << "," << slice.GetOrigin()[1] |
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413 << "," << slice.GetOrigin()[2] << ")"; |
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414 |
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415 Slice displayedSlice(slice_, THIN_SLICE_THICKNESS); |
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416 |
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417 //if (!displayedSlice.ContainsPlane(slice)) |
| 66 | 418 { |
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419 if (currentScene_.get() == NULL || |
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420 (pendingScene_.get() != NULL && |
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421 pendingScene_->IsComplete())) |
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422 { |
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423 currentScene_ = pendingScene_; |
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424 } |
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425 |
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426 slice_ = slice; |
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427 ResetPendingScene(); |
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428 |
| 92 | 429 InvalidateAllLayers(); // TODO Removing this line avoid loading twice the image in WASM |
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430 } |
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431 } |
| 66 | 432 |
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433 |
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434 void LayerWidget::NotifyGeometryReady(const ILayerSource& source) |
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435 { |
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436 size_t i; |
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437 if (LookupLayer(i, source)) |
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438 { |
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439 LOG(INFO) << "Geometry ready for layer " << i; |
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440 layers_[i]->ScheduleLayerCreation(slice_); |
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441 } |
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442 } |
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443 |
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444 |
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445 void LayerWidget::NotifyGeometryError(const ILayerSource& source) |
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446 { |
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447 LOG(ERROR) << "Cannot get geometry"; |
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448 } |
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449 |
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450 |
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451 void LayerWidget::InvalidateAllLayers() |
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452 { |
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453 for (size_t i = 0; i < layers_.size(); i++) |
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454 { |
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455 assert(layers_[i] != NULL); |
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456 layers_[i]->ScheduleLayerCreation(slice_); |
| 66 | 457 } |
| 458 } | |
| 459 | |
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460 |
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461 void LayerWidget::InvalidateLayer(size_t layer) |
| 66 | 462 { |
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463 if (layer >= layers_.size()) |
| 83 | 464 { |
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465 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
| 83 | 466 } |
| 66 | 467 |
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468 assert(layers_[layer] != NULL); |
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469 layers_[layer]->ScheduleLayerCreation(slice_); |
| 77 | 470 } |
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471 |
| 77 | 472 |
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473 void LayerWidget::NotifyContentChange(const ILayerSource& source) |
| 66 | 474 { |
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475 size_t index; |
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476 if (LookupLayer(index, source)) |
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477 { |
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478 layers_[index]->ScheduleLayerCreation(slice_); |
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479 } |
| 66 | 480 } |
| 481 | |
| 482 | |
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483 void LayerWidget::NotifySliceChange(const ILayerSource& source, |
| 77 | 484 const Slice& slice) |
| 66 | 485 { |
| 77 | 486 if (slice.ContainsPlane(slice_)) |
| 66 | 487 { |
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488 size_t index; |
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489 if (LookupLayer(index, source)) |
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490 { |
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491 layers_[index]->ScheduleLayerCreation(slice_); |
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492 } |
| 66 | 493 } |
| 494 } | |
| 495 | |
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496 |
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497 void LayerWidget::NotifyLayerReady(std::auto_ptr<ILayerRenderer>& renderer, |
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498 const ILayerSource& source, |
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499 const Slice& slice, |
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500 bool isError) |
| 66 | 501 { |
| 502 size_t index; | |
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503 if (renderer.get() != NULL && |
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504 LookupLayer(index, source) && |
| 85 | 505 slice.ContainsPlane(slice_)) // Whether the slice comes from an older request |
| 66 | 506 { |
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507 if (isError) |
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508 { |
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509 LOG(ERROR) << "Using error renderer on layer " << index; |
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510 } |
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511 else |
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diff
changeset
|
512 { |
|
f8bce1bebe01
removal of the NotifyLayerError callback
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
95
diff
changeset
|
513 LOG(INFO) << "Renderer ready for layer " << index; |
|
f8bce1bebe01
removal of the NotifyLayerError callback
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
95
diff
changeset
|
514 } |
|
f8bce1bebe01
removal of the NotifyLayerError callback
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
95
diff
changeset
|
515 |
|
90
64e60018943f
fix and observer refactoring
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
89
diff
changeset
|
516 UpdateLayer(index, renderer.release(), slice); |
| 66 | 517 } |
| 518 } | |
| 519 } |