Mercurial > hg > orthanc-stone
annotate Applications/Platforms/WebAssembly/WebAssemblyViewport.h @ 1865:4d83d27a955e
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 24 Nov 2021 12:25:32 +0100 |
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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) 2017-2021 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 #include "../../../OrthancStone/Sources/OrthancStone.h" |
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25 |
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26 #if !defined(ORTHANC_ENABLE_WASM) |
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27 # error Macro ORTHANC_ENABLE_WASM must be defined |
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28 #endif |
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29 |
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30 #if ORTHANC_ENABLE_WASM != 1 |
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31 # error This file can only be used if targeting WebAssembly |
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32 #endif |
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33 |
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34 #include "../../../OrthancStone/Sources/Viewport/IViewport.h" |
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35 #include "../../../OrthancStone/Sources/Viewport/IViewportInteractor.h" |
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36 |
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37 #include <Compatibility.h> |
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38 |
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39 #include <emscripten.h> |
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40 #include <emscripten/html5.h> |
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41 |
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42 #include <memory> |
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43 #include <string> |
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44 #include <vector> |
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46 |
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47 namespace OrthancStone |
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48 { |
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49 class WebAssemblyViewport : public IViewport, |
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50 public boost::enable_shared_from_this<WebAssemblyViewport> |
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51 |
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52 { |
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53 private: |
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54 class WasmLock; |
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55 |
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56 std::string canvasId_; |
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57 std::string canvasCssSelector_; |
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58 std::unique_ptr<ICompositor> compositor_; |
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59 std::unique_ptr<ViewportController> controller_; |
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60 std::unique_ptr<IViewportInteractor> interactor_; |
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61 bool enableEmscriptenMouseEvents_; |
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62 unsigned int canvasWidth_; |
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63 unsigned int canvasHeight_; |
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64 |
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65 static EM_BOOL OnRequestAnimationFrame(double time, void *userData); |
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66 |
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67 static EM_BOOL OnResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData); |
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68 |
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69 static EM_BOOL OnMouseDown(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData); |
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70 |
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71 static EM_BOOL OnMouseMove(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData); |
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72 |
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73 static EM_BOOL OnMouseUp(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData); |
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74 |
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75 protected: |
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76 void Invalidate(); |
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77 |
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78 void ClearCompositor() |
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79 { |
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80 compositor_.reset(); |
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81 } |
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82 |
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83 bool HasCompositor() const |
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84 { |
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85 return compositor_.get() != NULL; |
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86 } |
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87 |
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88 void AcquireCompositor(ICompositor* compositor /* takes ownership */); |
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89 |
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90 virtual void Paint(ICompositor& compositor, |
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91 ViewportController& controller) = 0; |
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92 |
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93 /** |
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94 The second argument is temporary and should be deleted once the migration |
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96 */ |
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97 WebAssemblyViewport(const std::string& canvasId, |
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99 |
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100 void PostConstructor(); |
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101 |
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102 |
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103 /** |
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104 * This method can be called to retrieve a cookie that can be passed to |
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105 * C-style callbacks that expect the object to be passed as a void* |
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106 * |
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107 * This cookie is a resource and must be freed when it is guaranteed |
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108 * not to be used anymore, with ReleaseObjectCookie |
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109 */ |
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110 void* CreateObjectCookie(); |
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111 |
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112 /** |
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113 * This static method can be used to dereference a cookie (i.e. retrieve |
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114 * a pointer to the underlying object) that has been created with |
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115 * WebAssemblyViewport::CreateObjectCookie() |
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116 * |
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117 * If this method returns NULL, it basically means that the |
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118 * WebAssemblyViewport has already been deleted and that you should NOT |
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119 * attempt to use it! |
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120 * |
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121 * This method never releases the cookie (for other in-flight callbacks |
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122 * could possibly require to cookie to be valid) |
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123 * |
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124 * If this method is called AFTER ReleaseObjectCookie has been called on |
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125 * the same cookie, the behavior is undefined and things will CERTAINLY |
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126 * go wrong. |
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127 * |
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128 * NEVER call this method on a void* that has not been generated by the |
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129 * CreateObjectCookie method of this class |
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130 */ |
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131 static WebAssemblyViewport* DereferenceObjectCookie(void* cookie); |
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132 |
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133 /** |
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134 * This method must be used when the object cookie will not be used anymore. |
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135 * |
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136 * You must call it when you are certain that no entity will attempt to |
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137 * dereference the cookie. |
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138 */ |
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139 static void ReleaseObjectCookie(void* cookie); |
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140 |
1577 | 141 void RefreshCanvasSize(); |
142 | |
143 unsigned int GetCanvasWidth() const | |
144 { | |
145 return canvasWidth_; | |
146 } | |
147 | |
148 unsigned int GetCanvasHeight() | |
149 { | |
150 return canvasHeight_; | |
151 } | |
152 | |
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153 public: |
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154 virtual ILock* Lock() ORTHANC_OVERRIDE; |
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155 |
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156 ~WebAssemblyViewport(); |
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157 |
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158 /** |
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159 This method takes ownership |
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160 */ |
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161 void AcquireInteractor(IViewportInteractor* interactor); |
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162 |
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163 const std::string& GetCanvasId() const |
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164 { |
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165 return canvasId_; |
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166 } |
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167 |
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168 /** |
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169 emscripten functions requires the css selector for the canvas. This is |
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170 different from the canvas id (the syntax is '#mycanvasid') |
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171 */ |
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172 const std::string& GetCanvasCssSelector() const |
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173 { |
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174 return canvasCssSelector_; |
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175 } |
1575 | 176 |
1578 | 177 void FitForPrint(); |
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178 }; |
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179 } |