Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Platforms/WebAssembly/WebGLViewport.cpp @ 1999:709b90ae0f89
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 02 Nov 2022 13:44:13 +0100 |
parents | 184b0aeae1af |
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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) 2017-2022 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
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7 * |
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8 * This program is free software: you can redistribute it and/or |
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9 * modify it under the terms of the GNU Lesser General Public License |
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10 * as published by the Free Software Foundation, either version 3 of |
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11 * the License, or (at your option) any later version. |
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12 * |
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13 * This program is distributed in the hope that it will be useful, but |
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 * Lesser General Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU Lesser General Public |
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19 * License along with this program. If not, see |
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20 * <http://www.gnu.org/licenses/>. |
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21 **/ |
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22 |
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23 |
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24 #include "WebGLViewport.h" |
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25 |
1901 | 26 #include "../../StoneException.h" |
27 #include "../../Scene2D/OpenGLCompositor.h" | |
28 #include "../../Scene2DViewport/ViewportController.h" | |
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29 |
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30 namespace OrthancStone |
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31 { |
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32 void WebGLViewport::Paint(ICompositor& compositor, |
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33 ViewportController& controller) |
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34 { |
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35 try |
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36 { |
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37 compositor.Refresh(controller.GetScene()); |
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38 |
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39 /** |
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40 * No need to manually swap the buffer: "Rendered WebGL content |
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41 * is implicitly presented (displayed to the user) on the canvas |
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42 * when the event handler that renders with WebGL returns back |
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43 * to the browser event loop." |
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44 * https://emscripten.org/docs/api_reference/html5.h.html#webgl-context |
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45 * |
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46 * Could call "emscripten_webgl_commit_frame()" if |
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47 * "explicitSwapControl" option were set to "true". |
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48 **/ |
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49 } |
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50 catch (const StoneException& e) |
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51 { |
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52 // Ignore problems about the loss of the WebGL context (edge case) |
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53 if (e.GetErrorCode() == ErrorCode_WebGLContextLost) |
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54 { |
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55 return; |
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56 } |
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57 else |
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58 { |
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59 throw; |
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60 } |
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61 } |
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62 } |
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63 |
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64 |
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65 WebGLViewport::WebGLViewport(const std::string& canvasId, bool enableEmscriptenMouseEvents) : |
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66 WebAssemblyViewport(canvasId,enableEmscriptenMouseEvents), |
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67 context_(GetCanvasCssSelector()) |
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68 { |
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69 AcquireCompositor(new OpenGLCompositor(context_)); |
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70 } |
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71 |
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72 boost::shared_ptr<WebGLViewport> WebGLViewport::Create( |
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73 const std::string& canvasId, bool enableEmscriptenMouseEvents) |
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74 { |
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75 boost::shared_ptr<WebGLViewport> that = boost::shared_ptr<WebGLViewport>( |
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76 new WebGLViewport(canvasId, enableEmscriptenMouseEvents)); |
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77 |
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78 that->WebAssemblyViewport::PostConstructor(); |
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79 return that; |
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80 } |
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81 |
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82 WebGLViewport::~WebGLViewport() |
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83 { |
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84 // Make sure to delete the compositor before its parent "context_" gets |
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85 // deleted |
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86 ClearCompositor(); |
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87 } |
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88 } |