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annotate Framework/Viewport/WebAssemblyViewport.h @ 1328:fd616c4a5904 broker

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Added mechanism to prevent callbacks from being sent on dead WebAssemblyViewport objects
author Benjamin Golinvaux <bgo@osimis.io>
date Fri, 27 Mar 2020 12:54:27 +0100
parents cbfdba08e039
children ab81ee8fce1f
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #pragma once
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23
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24 #if !defined(ORTHANC_ENABLE_WASM)
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25 # error Macro ORTHANC_ENABLE_WASM must be defined
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26 #endif
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27
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28 #if ORTHANC_ENABLE_WASM != 1
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29 # error This file can only be used if targeting WebAssembly
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30 #endif
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31
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32 #include "IViewport.h"
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33
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34 #include <emscripten.h>
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35 #include <emscripten/html5.h>
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36
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37 namespace OrthancStone
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38 {
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39 class WebAssemblyViewport : public IViewport,
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40 public boost::enable_shared_from_this<WebAssemblyViewport>
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41
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42 {
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43 private:
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44 class WasmLock;
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45
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46 std::string shortCanvasId_;
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47 std::string fullCanvasId_;
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48 std::unique_ptr<ICompositor> compositor_;
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49 boost::shared_ptr<ViewportController> controller_;
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50 std::unique_ptr<IViewportInteractor> interactor_;
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51
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52 static EM_BOOL OnRequestAnimationFrame(double time, void *userData);
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53
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54 static EM_BOOL OnResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData);
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55
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56 static EM_BOOL OnMouseDown(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData);
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57
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58 static EM_BOOL OnMouseMove(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData);
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59
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60 static EM_BOOL OnMouseUp(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData);
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61
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62 protected:
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63 void Invalidate();
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64
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65 void ClearCompositor()
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66 {
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67 compositor_.reset();
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68 }
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69
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70 bool HasCompositor() const
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71 {
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72 return compositor_.get() != NULL;
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73 }
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74
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75 void AcquireCompositor(ICompositor* compositor /* takes ownership */);
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76
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77 virtual void Paint(ICompositor& compositor,
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78 ViewportController& controller) = 0;
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79
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80 virtual void UpdateSize(ICompositor& compositor) = 0;
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81
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82 public:
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83 WebAssemblyViewport(const std::string& canvasId,
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84 const Scene2D* scene,
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85 boost::weak_ptr<UndoStack> undoStackW);
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86
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87 virtual ILock* Lock() ORTHANC_OVERRIDE;
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88
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89 /**
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90 This method takes ownership
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91 */
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92 void AcquireInteractor(IViewportInteractor* interactor);
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93
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94 const std::string& GetShortCanvasId() const
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95 {
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96 return shortCanvasId_;
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97 }
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98
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99 const std::string& GetFullCanvasId() const
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100 {
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101 return fullCanvasId_;
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102 }
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103 };
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104 }