Mercurial > hg > orthanc-stone
annotate Platforms/WebAssembly/wasm-viewport.ts @ 234:9afb50d1ac14 am
configure WasmViewport size relative to window size through html attributes
| author | am@osimis.io |
|---|---|
| date | Fri, 15 Jun 2018 16:36:29 +0200 |
| parents | 5027cb2feb51 |
| children |
| rev | line source |
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| 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(); |
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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 | |
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37 private static cppWebViewportsMaps_ : Map<number, WasmViewport> = new Map<number, WasmViewport>(); |
| 229 | 38 |
| 226 | 39 private module_ : any; |
| 40 private canvasId_ : string; | |
| 41 private htmlCanvas_ : HTMLCanvasElement; | |
| 42 private context_ : CanvasRenderingContext2D; | |
| 43 private imageData_ : any = null; | |
| 44 private renderingBuffer_ : any = null; | |
| 45 private touchZoom_ : any = false; | |
| 46 private touchTranslation_ : any = false; | |
| 47 | |
| 48 private ViewportSetSize : Function; | |
| 49 private ViewportRender : Function; | |
| 50 private ViewportMouseDown : Function; | |
| 51 private ViewportMouseMove : Function; | |
| 52 private ViewportMouseUp : Function; | |
| 53 private ViewportMouseEnter : Function; | |
| 54 private ViewportMouseLeave : Function; | |
| 55 private ViewportMouseWheel : Function; | |
| 56 private ViewportKeyPressed : Function; | |
| 57 | |
| 227 | 58 private pimpl_ : any; // Private pointer to the underlying WebAssembly C++ object |
| 59 | |
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60 public constructor(module: any, canvasId: string, cppViewport: any) { |
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61 |
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62 this.pimpl_ = cppViewport; |
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63 WasmViewport.cppWebViewportsMaps_[this.pimpl_] = this; |
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64 |
| 226 | 65 this.module_ = module; |
| 66 this.canvasId_ = canvasId; | |
| 67 this.htmlCanvas_ = document.getElementById(this.canvasId_) as HTMLCanvasElement; | |
| 68 this.context_ = this.htmlCanvas_.getContext('2d'); | |
| 69 | |
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70 this.ViewportSetSize = this.module_.cwrap('ViewportSetSize', null, [ 'number', 'number', 'number' ]); |
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71 this.ViewportRender = this.module_.cwrap('ViewportRender', null, [ 'number', 'number', 'number', 'number' ]); |
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72 this.ViewportMouseDown = this.module_.cwrap('ViewportMouseDown', null, [ 'number', 'number', 'number', 'number', 'number' ]); |
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73 this.ViewportMouseMove = this.module_.cwrap('ViewportMouseMove', null, [ 'number', 'number', 'number' ]); |
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74 this.ViewportMouseUp = this.module_.cwrap('ViewportMouseUp', null, [ 'number' ]); |
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75 this.ViewportMouseEnter = this.module_.cwrap('ViewportMouseEnter', null, [ 'number' ]); |
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76 this.ViewportMouseLeave = this.module_.cwrap('ViewportMouseLeave', null, [ 'number' ]); |
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77 this.ViewportMouseWheel = this.module_.cwrap('ViewportMouseWheel', null, [ 'number', 'number', 'number', 'number', 'number' ]); |
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78 this.ViewportKeyPressed = this.module_.cwrap('ViewportKeyPressed', null, [ 'number', 'string', 'number', 'number' ]); |
| 228 | 79 } |
| 80 | |
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81 public GetCppViewport() : number { |
| 228 | 82 return this.pimpl_; |
| 226 | 83 } |
| 84 | |
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85 public static GetFromCppViewport(cppViewportHandle: number) : WasmViewport { |
| 229 | 86 if (WasmViewport.cppWebViewportsMaps_[cppViewportHandle] !== undefined) { |
| 87 return WasmViewport.cppWebViewportsMaps_[cppViewportHandle]; | |
| 88 } | |
| 89 console.log("WasmViewport not found !"); | |
| 90 return undefined; | |
| 91 } | |
| 92 | |
| 226 | 93 public Redraw() { |
| 94 if (this.imageData_ === null || | |
| 95 this.renderingBuffer_ === null || | |
| 227 | 96 this.ViewportRender(this.pimpl_, |
| 97 this.imageData_.width, | |
| 226 | 98 this.imageData_.height, |
| 99 this.renderingBuffer_) == 0) { | |
| 100 console.log('The rendering has failed'); | |
| 101 } else { | |
| 102 // Create an accessor to the rendering buffer (i.e. create a | |
| 103 // "window" above the heap of the WASM module), then copy it to | |
| 104 // the ImageData object | |
| 105 this.imageData_.data.set(new Uint8ClampedArray( | |
| 106 this.module_.buffer, | |
| 107 this.renderingBuffer_, | |
| 108 this.imageData_.width * this.imageData_.height * 4)); | |
| 109 | |
| 110 this.context_.putImageData(this.imageData_, 0, 0); | |
| 111 } | |
| 112 } | |
| 113 | |
| 114 public Resize() { | |
| 115 if (this.imageData_ != null && | |
| 116 (this.imageData_.width != window.innerWidth || | |
| 117 this.imageData_.height != window.innerHeight)) { | |
| 118 this.imageData_ = null; | |
| 119 } | |
| 120 | |
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121 // width/height can be defined in percent of window width/height through html attributes like data-width-ratio="50" and data-height-ratio="20" |
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122 var widthRatio = Number(this.htmlCanvas_.dataset["widthRatio"]) || 100; |
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123 var heightRatio = Number(this.htmlCanvas_.dataset["heightRatio"]) || 100; |
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124 |
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125 this.htmlCanvas_.width = window.innerWidth * (widthRatio / 100); |
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126 this.htmlCanvas_.height = window.innerHeight * (heightRatio / 100); |
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127 |
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128 console.log("resizing WasmViewport: ", this.htmlCanvas_.width, "x", this.htmlCanvas_.height); |
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129 |
| 226 | 130 if (this.imageData_ === null) { |
| 131 this.imageData_ = this.context_.getImageData(0, 0, this.htmlCanvas_.width, this.htmlCanvas_.height); | |
| 228 | 132 this.ViewportSetSize(this.pimpl_, this.htmlCanvas_.width, this.htmlCanvas_.height); |
| 226 | 133 |
| 134 if (this.renderingBuffer_ != null) { | |
| 135 this.module_._free(this.renderingBuffer_); | |
| 136 } | |
| 137 | |
| 138 this.renderingBuffer_ = this.module_._malloc(this.imageData_.width * this.imageData_.height * 4); | |
| 139 } | |
| 140 | |
| 141 this.Redraw(); | |
| 142 } | |
| 143 | |
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144 public Initialize() { |
| 227 | 145 |
| 146 // Force the rendering of the viewport for the first time | |
| 147 this.Resize(); | |
| 226 | 148 |
| 228 | 149 var that : WasmViewport = this; |
| 227 | 150 // Register an event listener to call the Resize() function |
| 151 // each time the window is resized. | |
| 228 | 152 window.addEventListener('resize', function(event) { |
| 153 that.Resize(); | |
| 154 }, false); | |
| 226 | 155 |
| 227 | 156 this.htmlCanvas_.addEventListener('contextmenu', function(event) { |
| 157 // Prevent right click on the canvas | |
| 158 event.preventDefault(); | |
| 159 }, false); | |
| 160 | |
| 161 this.htmlCanvas_.addEventListener('mouseleave', function(event) { | |
| 228 | 162 that.ViewportMouseLeave(that.pimpl_); |
| 227 | 163 }); |
| 164 | |
| 165 this.htmlCanvas_.addEventListener('mouseenter', function(event) { | |
| 228 | 166 that.ViewportMouseEnter(that.pimpl_); |
| 227 | 167 }); |
| 168 | |
| 169 this.htmlCanvas_.addEventListener('mousedown', function(event) { | |
| 170 var x = event.pageX - this.offsetLeft; | |
| 171 var y = event.pageY - this.offsetTop; | |
| 228 | 172 that.ViewportMouseDown(that.pimpl_, event.button, x, y, 0 /* TODO */); |
| 227 | 173 }); |
| 174 | |
| 175 this.htmlCanvas_.addEventListener('mousemove', function(event) { | |
| 176 var x = event.pageX - this.offsetLeft; | |
| 177 var y = event.pageY - this.offsetTop; | |
| 228 | 178 that.ViewportMouseMove(that.pimpl_, x, y); |
| 227 | 179 }); |
| 180 | |
| 181 this.htmlCanvas_.addEventListener('mouseup', function(event) { | |
| 228 | 182 that.ViewportMouseUp(that.pimpl_); |
| 227 | 183 }); |
| 184 | |
| 185 window.addEventListener('keydown', function(event) { | |
| 228 | 186 that.ViewportKeyPressed(that.pimpl_, event.key, event.shiftKey, event.ctrlKey, event.altKey); |
| 227 | 187 }); |
| 226 | 188 |
| 227 | 189 this.htmlCanvas_.addEventListener('wheel', function(event) { |
| 190 var x = event.pageX - this.offsetLeft; | |
| 191 var y = event.pageY - this.offsetTop; | |
| 228 | 192 that.ViewportMouseWheel(that.pimpl_, event.deltaY, x, y, event.ctrlKey); |
| 227 | 193 event.preventDefault(); |
| 194 }); | |
| 195 | |
| 196 this.htmlCanvas_.addEventListener('touchstart', function(event) { | |
| 197 that.ResetTouch(); | |
| 198 }); | |
| 199 | |
| 200 this.htmlCanvas_.addEventListener('touchend', function(event) { | |
| 201 that.ResetTouch(); | |
| 202 }); | |
| 203 | |
| 204 this.htmlCanvas_.addEventListener('touchmove', function(event) { | |
| 205 if (that.touchTranslation_.length == 2) { | |
| 206 var t = that.GetTouchTranslation(event); | |
| 228 | 207 that.ViewportMouseMove(that.pimpl_, t[0], t[1]); |
| 227 | 208 } |
| 209 else if (that.touchZoom_.length == 3) { | |
| 226 | 210 var z0 = that.touchZoom_; |
| 227 | 211 var z1 = that.GetTouchZoom(event); |
| 228 | 212 that.ViewportMouseMove(that.pimpl_, z0[0], z0[1] - z0[2] + z1[2]); |
| 227 | 213 } |
| 214 else { | |
| 215 // Realize the gesture event | |
| 216 if (event.targetTouches.length == 1) { | |
| 217 // Exactly one finger inside the canvas => Setup a translation | |
| 218 that.touchTranslation_ = that.GetTouchTranslation(event); | |
| 228 | 219 that.ViewportMouseDown(that.pimpl_, |
| 220 1 /* middle button */, | |
| 227 | 221 that.touchTranslation_[0], |
| 222 that.touchTranslation_[1], 0); | |
| 223 } else if (event.targetTouches.length == 2) { | |
| 224 // Exactly 2 fingers inside the canvas => Setup a pinch/zoom | |
| 225 that.touchZoom_ = that.GetTouchZoom(event); | |
| 226 var z0 = that.touchZoom_; | |
| 228 | 227 that.ViewportMouseDown(that.pimpl_, |
| 228 2 /* right button */, | |
| 227 | 229 z0[0], |
| 230 z0[1], 0); | |
| 231 } | |
| 232 } | |
| 233 }); | |
| 234 } | |
| 226 | 235 |
| 236 public ResetTouch() { | |
| 227 | 237 if (this.touchTranslation_ || |
| 238 this.touchZoom_) { | |
| 228 | 239 this.ViewportMouseUp(this.pimpl_); |
| 226 | 240 } |
| 227 | 241 |
| 242 this.touchTranslation_ = false; | |
| 243 this.touchZoom_ = false; | |
| 244 } | |
| 226 | 245 |
| 246 public GetTouchTranslation(event) { | |
| 227 | 247 var touch = event.targetTouches[0]; |
| 248 return [ | |
| 249 touch.pageX, | |
| 250 touch.pageY | |
| 251 ]; | |
| 252 } | |
| 226 | 253 |
| 254 public GetTouchZoom(event) { | |
| 227 | 255 var touch1 = event.targetTouches[0]; |
| 256 var touch2 = event.targetTouches[1]; | |
| 257 var dx = (touch1.pageX - touch2.pageX); | |
| 258 var dy = (touch1.pageY - touch2.pageY); | |
| 259 var d = Math.sqrt(dx * dx + dy * dy); | |
| 260 return [ | |
| 261 (touch1.pageX + touch2.pageX) / 2.0, | |
| 262 (touch1.pageY + touch2.pageY) / 2.0, | |
| 263 d | |
| 264 ]; | |
| 265 } | |
| 226 | 266 |
| 227 | 267 } |
| 226 | 268 } |
| 269 |