Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Platforms/WebAssembly/WebAssemblyViewport.h @ 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 |
children | 07964689cb0b |
rev | line source |
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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 #pragma once |
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25 |
1901 | 26 #include "../../OrthancStone.h" |
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27 |
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28 #if !defined(ORTHANC_ENABLE_WASM) |
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29 # error Macro ORTHANC_ENABLE_WASM must be defined |
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30 #endif |
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31 |
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32 #if ORTHANC_ENABLE_WASM != 1 |
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33 # error This file can only be used if targeting WebAssembly |
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34 #endif |
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35 |
1901 | 36 #include "../../Viewport/IViewport.h" |
37 #include "../../Viewport/IViewportInteractor.h" | |
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38 |
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39 #include <Compatibility.h> |
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40 |
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41 #include <emscripten.h> |
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42 #include <emscripten/html5.h> |
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43 |
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44 #include <memory> |
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45 #include <string> |
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46 #include <vector> |
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47 #include <boost/enable_shared_from_this.hpp> |
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48 |
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49 namespace OrthancStone |
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50 { |
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51 class WebAssemblyViewport : public IViewport, |
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52 public boost::enable_shared_from_this<WebAssemblyViewport> |
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53 |
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54 { |
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55 private: |
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56 class WasmLock; |
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57 |
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58 std::string canvasId_; |
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59 std::string canvasCssSelector_; |
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60 std::unique_ptr<ICompositor> compositor_; |
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61 std::unique_ptr<ViewportController> controller_; |
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62 std::unique_ptr<IViewportInteractor> interactor_; |
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63 bool enableEmscriptenMouseEvents_; |
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64 unsigned int canvasWidth_; |
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65 unsigned int canvasHeight_; |
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66 |
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67 static EM_BOOL OnRequestAnimationFrame(double time, void *userData); |
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68 |
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69 static EM_BOOL OnResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData); |
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70 |
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71 static EM_BOOL OnMouseDown(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData); |
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72 |
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73 static EM_BOOL OnMouseMove(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData); |
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74 |
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75 static EM_BOOL OnMouseUp(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData); |
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76 |
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77 protected: |
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78 void Invalidate(); |
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79 |
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80 void ClearCompositor() |
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81 { |
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82 compositor_.reset(); |
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83 } |
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84 |
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85 bool HasCompositor() const |
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86 { |
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87 return compositor_.get() != NULL; |
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88 } |
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89 |
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90 void AcquireCompositor(ICompositor* compositor /* takes ownership */); |
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91 |
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92 virtual void Paint(ICompositor& compositor, |
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93 ViewportController& controller) = 0; |
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94 |
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95 /** |
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96 The second argument is temporary and should be deleted once the migration |
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97 to interactors is finished. It should be set to "true" for new applications. |
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98 */ |
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99 WebAssemblyViewport(const std::string& canvasId, |
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100 bool enableEmscriptenMouseEvents); |
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101 |
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102 void PostConstructor(); |
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103 |
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104 |
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105 /** |
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106 * This method can be called to retrieve a cookie that can be passed to |
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107 * C-style callbacks that expect the object to be passed as a void* |
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108 * |
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109 * This cookie is a resource and must be freed when it is guaranteed |
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110 * not to be used anymore, with ReleaseObjectCookie |
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111 */ |
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112 void* CreateObjectCookie(); |
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113 |
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114 /** |
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115 * This static method can be used to dereference a cookie (i.e. retrieve |
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116 * a pointer to the underlying object) that has been created with |
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117 * WebAssemblyViewport::CreateObjectCookie() |
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118 * |
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119 * If this method returns NULL, it basically means that the |
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120 * WebAssemblyViewport has already been deleted and that you should NOT |
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121 * attempt to use it! |
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122 * |
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123 * This method never releases the cookie (for other in-flight callbacks |
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124 * could possibly require to cookie to be valid) |
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125 * |
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126 * If this method is called AFTER ReleaseObjectCookie has been called on |
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127 * the same cookie, the behavior is undefined and things will CERTAINLY |
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128 * go wrong. |
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129 * |
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130 * NEVER call this method on a void* that has not been generated by the |
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131 * CreateObjectCookie method of this class |
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132 */ |
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133 static WebAssemblyViewport* DereferenceObjectCookie(void* cookie); |
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134 |
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135 /** |
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136 * This method must be used when the object cookie will not be used anymore. |
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137 * |
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138 * You must call it when you are certain that no entity will attempt to |
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139 * dereference the cookie. |
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140 */ |
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141 static void ReleaseObjectCookie(void* cookie); |
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142 |
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143 void RefreshCanvasSize(); |
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144 |
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145 unsigned int GetCanvasWidth() const |
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146 { |
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147 return canvasWidth_; |
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148 } |
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149 |
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150 unsigned int GetCanvasHeight() |
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151 { |
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152 return canvasHeight_; |
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153 } |
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154 |
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155 public: |
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156 virtual ILock* Lock() ORTHANC_OVERRIDE; |
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157 |
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158 ~WebAssemblyViewport(); |
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159 |
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160 /** |
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161 This method takes ownership |
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162 */ |
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163 void AcquireInteractor(IViewportInteractor* interactor); |
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164 |
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165 const std::string& GetCanvasId() const |
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166 { |
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167 return canvasId_; |
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168 } |
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169 |
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170 /** |
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171 emscripten functions requires the css selector for the canvas. This is |
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172 different from the canvas id (the syntax is '#mycanvasid') |
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173 */ |
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174 const std::string& GetCanvasCssSelector() const |
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175 { |
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176 return canvasCssSelector_; |
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177 } |
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178 |
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179 void FitForPrint(); |
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180 }; |
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181 } |