Mercurial > hg > orthanc-stone
view Platforms/Wasm/wasm-viewport.ts @ 1142:76705b430c78 toa2019110801
Merge
author | Benjamin Golinvaux <bgo@osimis.io> |
---|---|
date | Fri, 08 Nov 2019 14:36:24 +0100 |
parents | 67d0a8da4afe |
children |
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import * as wasmApplicationRunner from './wasm-application-runner' import * as Logger from './logger' var isPendingRedraw = false; function ScheduleWebViewportRedraw(cppViewportHandle: any) : void { if (!isPendingRedraw) { isPendingRedraw = true; Logger.defaultLogger.debug('Scheduling a refresh of the viewport, as its content changed'); window.requestAnimationFrame(function() { isPendingRedraw = false; let viewport = WasmViewport.GetFromCppViewport(cppViewportHandle); if (viewport) { viewport.Redraw(); } }); } } (<any>window).ScheduleWebViewportRedraw = ScheduleWebViewportRedraw; declare function UTF8ToString(v: any): string; function CreateWasmViewport(htmlCanvasId: string) : any { var cppViewportHandle = wasmApplicationRunner.CreateCppViewport(); var canvasId = UTF8ToString(htmlCanvasId); var webViewport = new WasmViewport((<any> window).StoneFrameworkModule, canvasId, cppViewportHandle); // viewports are stored in a static map in WasmViewport -> won't be deleted webViewport.Initialize(); return cppViewportHandle; } (<any>window).CreateWasmViewport = CreateWasmViewport; export class WasmViewport { private static viewportsMapByCppHandle_ : Map<number, WasmViewport> = new Map<number, WasmViewport>(); // key = the C++ handle private static viewportsMapByCanvasId_ : Map<string, WasmViewport> = new Map<string, WasmViewport>(); // key = the canvasId private module_ : any; private canvasId_ : string; private htmlCanvas_ : HTMLCanvasElement; private context_ : CanvasRenderingContext2D | null; private imageData_ : any = null; private renderingBuffer_ : any = null; private touchGestureInProgress_: boolean = false; private touchCount_: number = 0; private touchGestureLastCoordinates_: [number, number][] = []; // last x,y coordinates of each touch private touchZoom_ : any = false; private touchTranslation_ : any = false; private ViewportSetSize : Function; private ViewportRender : Function; private ViewportMouseDown : Function; private ViewportMouseMove : Function; private ViewportMouseUp : Function; private ViewportMouseEnter : Function; private ViewportMouseLeave : Function; private ViewportMouseWheel : Function; private ViewportKeyPressed : Function; private ViewportTouchStart : Function; private ViewportTouchMove : Function; private ViewportTouchEnd : Function; private pimpl_ : any; // Private pointer to the underlying WebAssembly C++ object public constructor(module: any, canvasId: string, cppViewport: any) { this.pimpl_ = cppViewport; WasmViewport.viewportsMapByCppHandle_[this.pimpl_] = this; WasmViewport.viewportsMapByCanvasId_[canvasId] = this; this.module_ = module; this.canvasId_ = canvasId; this.htmlCanvas_ = document.getElementById(this.canvasId_) as HTMLCanvasElement; if (this.htmlCanvas_ == null) { Logger.defaultLogger.error("Can not create WasmViewport, did not find the canvas whose id is '", this.canvasId_, "'"); } this.context_ = this.htmlCanvas_.getContext('2d'); this.ViewportSetSize = this.module_.cwrap('ViewportSetSize', null, [ 'number', 'number', 'number' ]); this.ViewportRender = this.module_.cwrap('ViewportRender', null, [ 'number', 'number', 'number', 'number' ]); this.ViewportMouseDown = this.module_.cwrap('ViewportMouseDown', null, [ 'number', 'number', 'number', 'number', 'number' ]); this.ViewportMouseMove = this.module_.cwrap('ViewportMouseMove', null, [ 'number', 'number', 'number' ]); this.ViewportMouseUp = this.module_.cwrap('ViewportMouseUp', null, [ 'number' ]); this.ViewportMouseEnter = this.module_.cwrap('ViewportMouseEnter', null, [ 'number' ]); this.ViewportMouseLeave = this.module_.cwrap('ViewportMouseLeave', null, [ 'number' ]); this.ViewportMouseWheel = this.module_.cwrap('ViewportMouseWheel', null, [ 'number', 'number', 'number', 'number', 'number' ]); this.ViewportKeyPressed = this.module_.cwrap('ViewportKeyPressed', null, [ 'number', 'number', 'string', 'number', 'number' ]); this.ViewportTouchStart = this.module_.cwrap('ViewportTouchStart', null, [ 'number', 'number', 'number', 'number', 'number', 'number', 'number' ]); this.ViewportTouchMove = this.module_.cwrap('ViewportTouchMove', null, [ 'number', 'number', 'number', 'number', 'number', 'number', 'number' ]); this.ViewportTouchEnd = this.module_.cwrap('ViewportTouchEnd', null, [ 'number', 'number', 'number', 'number', 'number', 'number', 'number' ]); } public GetCppViewport() : number { return this.pimpl_; } public static GetFromCppViewport(cppViewportHandle: number) : WasmViewport | null { if (WasmViewport.viewportsMapByCppHandle_[cppViewportHandle] !== undefined) { return WasmViewport.viewportsMapByCppHandle_[cppViewportHandle]; } Logger.defaultLogger.error("WasmViewport not found !"); return null; } public static GetFromCanvasId(canvasId: string) : WasmViewport | null { if (WasmViewport.viewportsMapByCanvasId_[canvasId] !== undefined) { return WasmViewport.viewportsMapByCanvasId_[canvasId]; } Logger.defaultLogger.error("WasmViewport not found !"); return null; } public static ResizeAll() { for (let canvasId in WasmViewport.viewportsMapByCanvasId_) { WasmViewport.viewportsMapByCanvasId_[canvasId].Resize(); } } public Redraw() { if (this.imageData_ === null || this.renderingBuffer_ === null || this.ViewportRender(this.pimpl_, this.imageData_.width, this.imageData_.height, this.renderingBuffer_) == 0) { Logger.defaultLogger.error('The rendering has failed'); } else { // Create an accessor to the rendering buffer (i.e. create a // "window" above the heap of the WASM module), then copy it to // the ImageData object this.imageData_.data.set(new Uint8ClampedArray( this.module_.HEAPU8.buffer, this.renderingBuffer_, this.imageData_.width * this.imageData_.height * 4)); if (this.context_) { this.context_.putImageData(this.imageData_, 0, 0); } } } public Resize() { if (this.imageData_ != null && (this.imageData_.width != window.innerWidth || this.imageData_.height != window.innerHeight)) { this.imageData_ = null; } // width/height is defined by the parent width/height if (this.htmlCanvas_.parentElement) { this.htmlCanvas_.width = this.htmlCanvas_.parentElement.offsetWidth; this.htmlCanvas_.height = this.htmlCanvas_.parentElement.offsetHeight; Logger.defaultLogger.debug("resizing WasmViewport: ", this.htmlCanvas_.width, "x", this.htmlCanvas_.height); if (this.imageData_ === null && this.context_) { this.imageData_ = this.context_.getImageData(0, 0, this.htmlCanvas_.width, this.htmlCanvas_.height); this.ViewportSetSize(this.pimpl_, this.htmlCanvas_.width, this.htmlCanvas_.height); if (this.renderingBuffer_ != null) { this.module_._free(this.renderingBuffer_); } this.renderingBuffer_ = this.module_._malloc(this.imageData_.width * this.imageData_.height * 4); } else { this.ViewportSetSize(this.pimpl_, this.htmlCanvas_.width, this.htmlCanvas_.height); } this.Redraw(); } } public Initialize() { // Force the rendering of the viewport for the first time this.Resize(); var that : WasmViewport = this; // Register an event listener to call the Resize() function // each time the window is resized. window.addEventListener('resize', function(event) { that.Resize(); }, false); this.htmlCanvas_.addEventListener('contextmenu', function(event) { // Prevent right click on the canvas event.preventDefault(); }, false); this.htmlCanvas_.addEventListener('mouseleave', function(event) { that.ViewportMouseLeave(that.pimpl_); }); this.htmlCanvas_.addEventListener('mouseenter', function(event) { that.ViewportMouseEnter(that.pimpl_); }); this.htmlCanvas_.addEventListener('mousedown', function(event) { var x = event.pageX - this.offsetLeft; var y = event.pageY - this.offsetTop; that.ViewportMouseDown(that.pimpl_, event.button, x, y, 0 /* TODO detect modifier keys*/); }); this.htmlCanvas_.addEventListener('mousemove', function(event) { var x = event.pageX - this.offsetLeft; var y = event.pageY - this.offsetTop; that.ViewportMouseMove(that.pimpl_, x, y); }); this.htmlCanvas_.addEventListener('mouseup', function(event) { that.ViewportMouseUp(that.pimpl_); }); window.addEventListener('keydown', function(event) { var keyChar: string | null = event.key; var keyCode = event.keyCode if (keyChar.length == 1) { keyCode = 0; // maps to OrthancStone::KeyboardKeys_Generic } else { keyChar = null; } // console.log("key: ", keyCode, keyChar); that.ViewportKeyPressed(that.pimpl_, keyCode, keyChar, event.shiftKey, event.ctrlKey, event.altKey); }); this.htmlCanvas_.addEventListener('wheel', function(event) { var x = event.pageX - this.offsetLeft; var y = event.pageY - this.offsetTop; that.ViewportMouseWheel(that.pimpl_, event.deltaY, x, y, event.ctrlKey); event.preventDefault(); }, {passive: false}); // must not be passive if calling event.preventDefault, ie to cancel scroll or zoom of the whole interface this.htmlCanvas_.addEventListener('touchstart', function(event: TouchEvent) { // don't propagate events to the whole body (this could zoom the entire page instead of zooming the viewport) event.preventDefault(); event.stopPropagation(); // TODO: find a way to pass the coordinates as an array between JS and C++ var x0 = 0; var y0 = 0; var x1 = 0; var y1 = 0; var x2 = 0; var y2 = 0; if (event.targetTouches.length > 0) { x0 = event.targetTouches[0].pageX; y0 = event.targetTouches[0].pageY; } if (event.targetTouches.length > 1) { x1 = event.targetTouches[1].pageX; y1 = event.targetTouches[1].pageY; } if (event.targetTouches.length > 2) { x2 = event.targetTouches[2].pageX; y2 = event.targetTouches[2].pageY; } that.ViewportTouchStart(that.pimpl_, event.targetTouches.length, x0, y0, x1, y1, x2, y2); }, {passive: false}); // must not be passive if calling event.preventDefault, ie to cancel scroll or zoom of the whole interface this.htmlCanvas_.addEventListener('touchend', function(event) { // don't propagate events to the whole body (this could zoom the entire page instead of zooming the viewport) event.preventDefault(); event.stopPropagation(); // TODO: find a way to pass the coordinates as an array between JS and C++ var x0 = 0; var y0 = 0; var x1 = 0; var y1 = 0; var x2 = 0; var y2 = 0; if (event.targetTouches.length > 0) { x0 = event.targetTouches[0].pageX; y0 = event.targetTouches[0].pageY; } if (event.targetTouches.length > 1) { x1 = event.targetTouches[1].pageX; y1 = event.targetTouches[1].pageY; } if (event.targetTouches.length > 2) { x2 = event.targetTouches[2].pageX; y2 = event.targetTouches[2].pageY; } that.ViewportTouchEnd(that.pimpl_, event.targetTouches.length, x0, y0, x1, y1, x2, y2); }); this.htmlCanvas_.addEventListener('touchmove', function(event: TouchEvent) { // don't propagate events to the whole body (this could zoom the entire page instead of zooming the viewport) event.preventDefault(); event.stopPropagation(); // TODO: find a way to pass the coordinates as an array between JS and C++ var x0 = 0; var y0 = 0; var x1 = 0; var y1 = 0; var x2 = 0; var y2 = 0; if (event.targetTouches.length > 0) { x0 = event.targetTouches[0].pageX; y0 = event.targetTouches[0].pageY; } if (event.targetTouches.length > 1) { x1 = event.targetTouches[1].pageX; y1 = event.targetTouches[1].pageY; } if (event.targetTouches.length > 2) { x2 = event.targetTouches[2].pageX; y2 = event.targetTouches[2].pageY; } that.ViewportTouchMove(that.pimpl_, event.targetTouches.length, x0, y0, x1, y1, x2, y2); return; }, {passive: false}); // must not be passive if calling event.preventDefault, ie to cancel scroll or zoom of the whole interface } public ResetTouch() { if (this.touchTranslation_ || this.touchZoom_) { this.ViewportMouseUp(this.pimpl_); } this.touchTranslation_ = false; this.touchZoom_ = false; } public GetTouchTranslation(event: any) { var touch = event.targetTouches[0]; return [ touch.pageX, touch.pageY ]; } public GetTouchZoom(event: any) { var touch1 = event.targetTouches[0]; var touch2 = event.targetTouches[1]; var dx = (touch1.pageX - touch2.pageX); var dy = (touch1.pageY - touch2.pageY); var d = Math.sqrt(dx * dx + dy * dy); return [ (touch1.pageX + touch2.pageX) / 2.0, (touch1.pageY + touch2.pageY) / 2.0, d ]; } }