Mercurial > hg > orthanc-stone
annotate Platforms/Wasm/wasm-viewport.ts @ 427:3f9017db1738 am-vsol-upgrade-radiography-export
wip
| author | am@osimis.io |
|---|---|
| date | Fri, 23 Nov 2018 16:06:23 +0100 |
| parents | 8bf717c4e497 |
| children | 59b4afa92dee 5055031f4a06 |
| rev | line source |
|---|---|
| 230 | 1 var isPendingRedraw = false; |
| 229 | 2 |
| 230 | 3 function ScheduleWebViewportRedraw(cppViewportHandle: any) : void |
| 4 { | |
| 5 if (!isPendingRedraw) { | |
| 6 isPendingRedraw = true; | |
| 7 console.log('Scheduling a refresh of the viewport, as its content changed'); | |
| 8 window.requestAnimationFrame(function() { | |
| 9 isPendingRedraw = false; | |
| 10 Stone.WasmViewport.GetFromCppViewport(cppViewportHandle).Redraw(); | |
| 11 }); | |
| 229 | 12 } |
| 230 | 13 } |
| 226 | 14 |
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15 declare function UTF8ToString(any): string; |
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16 |
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17 function CreateWasmViewport(htmlCanvasId: string) : any { |
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18 var cppViewportHandle = CreateCppViewport(); |
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19 var canvasId = UTF8ToString(htmlCanvasId); |
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20 var webViewport = new Stone.WasmViewport(StoneFrameworkModule, canvasId, cppViewportHandle); // viewports are stored in a static map in WasmViewport -> won't be deleted |
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21 webViewport.Initialize(); |
| 314 | 22 |
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23 return cppViewportHandle; |
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24 } |
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25 |
| 226 | 26 module Stone { |
| 27 | |
| 28 // export declare type InitializationCallback = () => void; | |
| 29 | |
| 30 // export declare var StoneFrameworkModule : any; | |
| 31 | |
| 32 //const ASSETS_FOLDER : string = "assets/lib"; | |
| 33 //const WASM_FILENAME : string = "orthanc-framework"; | |
| 229 | 34 |
| 226 | 35 export class WasmViewport { |
| 36 | |
| 313 | 37 private static viewportsMapByCppHandle_ : Map<number, WasmViewport> = new Map<number, WasmViewport>(); // key = the C++ handle |
| 38 private static viewportsMapByCanvasId_ : Map<string, WasmViewport> = new Map<string, WasmViewport>(); // key = the canvasId | |
| 229 | 39 |
| 226 | 40 private module_ : any; |
| 41 private canvasId_ : string; | |
| 42 private htmlCanvas_ : HTMLCanvasElement; | |
| 43 private context_ : CanvasRenderingContext2D; | |
| 44 private imageData_ : any = null; | |
| 45 private renderingBuffer_ : any = null; | |
| 46 private touchZoom_ : any = false; | |
| 47 private touchTranslation_ : any = false; | |
| 48 | |
| 49 private ViewportSetSize : Function; | |
| 50 private ViewportRender : Function; | |
| 51 private ViewportMouseDown : Function; | |
| 52 private ViewportMouseMove : Function; | |
| 53 private ViewportMouseUp : Function; | |
| 54 private ViewportMouseEnter : Function; | |
| 55 private ViewportMouseLeave : Function; | |
| 56 private ViewportMouseWheel : Function; | |
| 57 private ViewportKeyPressed : Function; | |
| 58 | |
| 227 | 59 private pimpl_ : any; // Private pointer to the underlying WebAssembly C++ object |
| 60 | |
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61 public constructor(module: any, canvasId: string, cppViewport: any) { |
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62 |
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63 this.pimpl_ = cppViewport; |
| 313 | 64 WasmViewport.viewportsMapByCppHandle_[this.pimpl_] = this; |
| 65 WasmViewport.viewportsMapByCanvasId_[canvasId] = this; | |
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66 |
| 226 | 67 this.module_ = module; |
| 68 this.canvasId_ = canvasId; | |
| 69 this.htmlCanvas_ = document.getElementById(this.canvasId_) as HTMLCanvasElement; | |
| 244 | 70 if (this.htmlCanvas_ == null) { |
| 71 console.log("Can not create WasmViewport, did not find the canvas whose id is '", this.canvasId_, "'"); | |
| 72 } | |
| 226 | 73 this.context_ = this.htmlCanvas_.getContext('2d'); |
| 74 | |
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75 this.ViewportSetSize = this.module_.cwrap('ViewportSetSize', null, [ 'number', 'number', 'number' ]); |
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76 this.ViewportRender = this.module_.cwrap('ViewportRender', null, [ 'number', 'number', 'number', 'number' ]); |
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77 this.ViewportMouseDown = this.module_.cwrap('ViewportMouseDown', null, [ 'number', 'number', 'number', 'number', 'number' ]); |
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78 this.ViewportMouseMove = this.module_.cwrap('ViewportMouseMove', null, [ 'number', 'number', 'number' ]); |
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79 this.ViewportMouseUp = this.module_.cwrap('ViewportMouseUp', null, [ 'number' ]); |
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80 this.ViewportMouseEnter = this.module_.cwrap('ViewportMouseEnter', null, [ 'number' ]); |
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81 this.ViewportMouseLeave = this.module_.cwrap('ViewportMouseLeave', null, [ 'number' ]); |
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82 this.ViewportMouseWheel = this.module_.cwrap('ViewportMouseWheel', null, [ 'number', 'number', 'number', 'number', 'number' ]); |
| 327 | 83 this.ViewportKeyPressed = this.module_.cwrap('ViewportKeyPressed', null, [ 'number', 'number', 'string', 'number', 'number' ]); |
| 228 | 84 } |
| 85 | |
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86 public GetCppViewport() : number { |
| 228 | 87 return this.pimpl_; |
| 226 | 88 } |
| 89 | |
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90 public static GetFromCppViewport(cppViewportHandle: number) : WasmViewport { |
| 313 | 91 if (WasmViewport.viewportsMapByCppHandle_[cppViewportHandle] !== undefined) { |
| 92 return WasmViewport.viewportsMapByCppHandle_[cppViewportHandle]; | |
| 93 } | |
| 94 console.log("WasmViewport not found !"); | |
| 95 return undefined; | |
| 96 } | |
| 97 | |
| 98 public static GetFromCanvasId(canvasId: string) : WasmViewport { | |
| 99 if (WasmViewport.viewportsMapByCanvasId_[canvasId] !== undefined) { | |
| 100 return WasmViewport.viewportsMapByCanvasId_[canvasId]; | |
| 229 | 101 } |
| 102 console.log("WasmViewport not found !"); | |
| 103 return undefined; | |
| 104 } | |
| 105 | |
| 314 | 106 public static ResizeAll() { |
| 107 for (let canvasId in WasmViewport.viewportsMapByCanvasId_) { | |
| 108 WasmViewport.viewportsMapByCanvasId_[canvasId].Resize(); | |
| 109 } | |
| 110 } | |
| 111 | |
| 226 | 112 public Redraw() { |
| 113 if (this.imageData_ === null || | |
| 114 this.renderingBuffer_ === null || | |
| 227 | 115 this.ViewportRender(this.pimpl_, |
| 116 this.imageData_.width, | |
| 226 | 117 this.imageData_.height, |
| 118 this.renderingBuffer_) == 0) { | |
| 119 console.log('The rendering has failed'); | |
| 120 } else { | |
| 121 // Create an accessor to the rendering buffer (i.e. create a | |
| 122 // "window" above the heap of the WASM module), then copy it to | |
| 123 // the ImageData object | |
| 124 this.imageData_.data.set(new Uint8ClampedArray( | |
| 125 this.module_.buffer, | |
| 126 this.renderingBuffer_, | |
| 127 this.imageData_.width * this.imageData_.height * 4)); | |
| 128 | |
| 129 this.context_.putImageData(this.imageData_, 0, 0); | |
| 130 } | |
| 131 } | |
| 132 | |
| 133 public Resize() { | |
| 134 if (this.imageData_ != null && | |
| 135 (this.imageData_.width != window.innerWidth || | |
| 136 this.imageData_.height != window.innerHeight)) { | |
| 137 this.imageData_ = null; | |
| 138 } | |
| 139 | |
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140 // width/height is defined by the parent width/height |
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141 this.htmlCanvas_.width = this.htmlCanvas_.parentElement.offsetWidth; |
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142 this.htmlCanvas_.height = this.htmlCanvas_.parentElement.offsetHeight; |
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143 |
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144 console.log("resizing WasmViewport: ", this.htmlCanvas_.width, "x", this.htmlCanvas_.height); |
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145 |
| 226 | 146 if (this.imageData_ === null) { |
| 147 this.imageData_ = this.context_.getImageData(0, 0, this.htmlCanvas_.width, this.htmlCanvas_.height); | |
| 228 | 148 this.ViewportSetSize(this.pimpl_, this.htmlCanvas_.width, this.htmlCanvas_.height); |
| 226 | 149 |
| 150 if (this.renderingBuffer_ != null) { | |
| 151 this.module_._free(this.renderingBuffer_); | |
| 152 } | |
| 153 | |
| 154 this.renderingBuffer_ = this.module_._malloc(this.imageData_.width * this.imageData_.height * 4); | |
| 313 | 155 } else { |
| 156 this.ViewportSetSize(this.pimpl_, this.htmlCanvas_.width, this.htmlCanvas_.height); | |
| 226 | 157 } |
| 158 | |
| 159 this.Redraw(); | |
| 160 } | |
| 161 | |
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162 public Initialize() { |
| 227 | 163 |
| 164 // Force the rendering of the viewport for the first time | |
| 165 this.Resize(); | |
| 226 | 166 |
| 228 | 167 var that : WasmViewport = this; |
| 227 | 168 // Register an event listener to call the Resize() function |
| 169 // each time the window is resized. | |
| 228 | 170 window.addEventListener('resize', function(event) { |
| 171 that.Resize(); | |
| 172 }, false); | |
| 226 | 173 |
| 227 | 174 this.htmlCanvas_.addEventListener('contextmenu', function(event) { |
| 175 // Prevent right click on the canvas | |
| 176 event.preventDefault(); | |
| 177 }, false); | |
| 178 | |
| 179 this.htmlCanvas_.addEventListener('mouseleave', function(event) { | |
| 228 | 180 that.ViewportMouseLeave(that.pimpl_); |
| 227 | 181 }); |
| 182 | |
| 183 this.htmlCanvas_.addEventListener('mouseenter', function(event) { | |
| 228 | 184 that.ViewportMouseEnter(that.pimpl_); |
| 227 | 185 }); |
| 186 | |
| 187 this.htmlCanvas_.addEventListener('mousedown', function(event) { | |
| 188 var x = event.pageX - this.offsetLeft; | |
| 189 var y = event.pageY - this.offsetTop; | |
| 228 | 190 that.ViewportMouseDown(that.pimpl_, event.button, x, y, 0 /* TODO */); |
| 227 | 191 }); |
| 192 | |
| 193 this.htmlCanvas_.addEventListener('mousemove', function(event) { | |
| 194 var x = event.pageX - this.offsetLeft; | |
| 195 var y = event.pageY - this.offsetTop; | |
| 228 | 196 that.ViewportMouseMove(that.pimpl_, x, y); |
| 227 | 197 }); |
| 198 | |
| 199 this.htmlCanvas_.addEventListener('mouseup', function(event) { | |
| 228 | 200 that.ViewportMouseUp(that.pimpl_); |
| 227 | 201 }); |
| 202 | |
| 203 window.addEventListener('keydown', function(event) { | |
| 327 | 204 var keyChar = event.key; |
| 205 var keyCode = event.keyCode | |
| 206 if (keyChar.length == 1) { | |
| 207 keyCode = 0; // maps to OrthancStone::KeyboardKeys_Generic | |
| 208 } else { | |
| 209 keyChar = null; | |
| 210 } | |
| 211 // console.log("key: ", keyCode, keyChar); | |
| 212 that.ViewportKeyPressed(that.pimpl_, keyCode, keyChar, event.shiftKey, event.ctrlKey, event.altKey); | |
| 227 | 213 }); |
| 226 | 214 |
| 227 | 215 this.htmlCanvas_.addEventListener('wheel', function(event) { |
| 216 var x = event.pageX - this.offsetLeft; | |
| 217 var y = event.pageY - this.offsetTop; | |
| 228 | 218 that.ViewportMouseWheel(that.pimpl_, event.deltaY, x, y, event.ctrlKey); |
| 227 | 219 event.preventDefault(); |
| 220 }); | |
| 221 | |
| 222 this.htmlCanvas_.addEventListener('touchstart', function(event) { | |
| 223 that.ResetTouch(); | |
| 224 }); | |
| 225 | |
| 226 this.htmlCanvas_.addEventListener('touchend', function(event) { | |
| 227 that.ResetTouch(); | |
| 228 }); | |
| 229 | |
| 230 this.htmlCanvas_.addEventListener('touchmove', function(event) { | |
| 231 if (that.touchTranslation_.length == 2) { | |
| 232 var t = that.GetTouchTranslation(event); | |
| 228 | 233 that.ViewportMouseMove(that.pimpl_, t[0], t[1]); |
| 227 | 234 } |
| 235 else if (that.touchZoom_.length == 3) { | |
| 226 | 236 var z0 = that.touchZoom_; |
| 227 | 237 var z1 = that.GetTouchZoom(event); |
| 228 | 238 that.ViewportMouseMove(that.pimpl_, z0[0], z0[1] - z0[2] + z1[2]); |
| 227 | 239 } |
| 240 else { | |
| 241 // Realize the gesture event | |
| 242 if (event.targetTouches.length == 1) { | |
| 243 // Exactly one finger inside the canvas => Setup a translation | |
| 244 that.touchTranslation_ = that.GetTouchTranslation(event); | |
| 228 | 245 that.ViewportMouseDown(that.pimpl_, |
| 246 1 /* middle button */, | |
| 227 | 247 that.touchTranslation_[0], |
| 248 that.touchTranslation_[1], 0); | |
| 249 } else if (event.targetTouches.length == 2) { | |
| 250 // Exactly 2 fingers inside the canvas => Setup a pinch/zoom | |
| 251 that.touchZoom_ = that.GetTouchZoom(event); | |
| 252 var z0 = that.touchZoom_; | |
| 228 | 253 that.ViewportMouseDown(that.pimpl_, |
| 254 2 /* right button */, | |
| 227 | 255 z0[0], |
| 256 z0[1], 0); | |
| 257 } | |
| 258 } | |
| 259 }); | |
| 260 } | |
| 226 | 261 |
| 262 public ResetTouch() { | |
| 227 | 263 if (this.touchTranslation_ || |
| 264 this.touchZoom_) { | |
| 228 | 265 this.ViewportMouseUp(this.pimpl_); |
| 226 | 266 } |
| 227 | 267 |
| 268 this.touchTranslation_ = false; | |
| 269 this.touchZoom_ = false; | |
| 270 } | |
| 226 | 271 |
| 272 public GetTouchTranslation(event) { | |
| 227 | 273 var touch = event.targetTouches[0]; |
| 274 return [ | |
| 275 touch.pageX, | |
| 276 touch.pageY | |
| 277 ]; | |
| 278 } | |
| 226 | 279 |
| 280 public GetTouchZoom(event) { | |
| 227 | 281 var touch1 = event.targetTouches[0]; |
| 282 var touch2 = event.targetTouches[1]; | |
| 283 var dx = (touch1.pageX - touch2.pageX); | |
| 284 var dy = (touch1.pageY - touch2.pageY); | |
| 285 var d = Math.sqrt(dx * dx + dy * dy); | |
| 286 return [ | |
| 287 (touch1.pageX + touch2.pageX) / 2.0, | |
| 288 (touch1.pageY + touch2.pageY) / 2.0, | |
| 289 d | |
| 290 ]; | |
| 291 } | |
| 226 | 292 |
| 227 | 293 } |
| 226 | 294 } |
| 295 |