offscreen-example-transferControlToOffscreen.js

/* title: Offscreen transferControlToOffscreen category: offscreen files: ../point_src/core/head.js ../point_src/pointpen.js ../point_src/pointdraw.js ../point_src/math.js ../point_src/extras.js ../point_src/point-content.js ../point_src/pointlist.js ../point_src/pointlistpen.js ../point_src/point.js ../point_src/stage.js ../point_src/offscreen.js mouse dragging stroke --- In this example we call `canvas.transferControlToOffscreen()` on mount and set the stage context to the returned offscreen canvas. This copies the stage dimensions is similar to `stage.offscreen.create()`. */ class MainStageOffScreenContext extends Stage { /* In this format we Install an "offscreen canvas" as the primary rendering unit. the `copyToOnScreen` copies the offScreen canvas into the visible onscreen canvas. */ // canvas = document.getElementById('playspace'); canvas = 'playspace' // canvas = new OffscreenCanvas(500, 400) mounted(){ // this.canvas = new OffscreenCanvas(500, 400) // this.canvas = this.canvas.transferControlToOffscreen() // this.offScreenCanvas = this.offscreen.create() this.offScreenCanvas = this.canvas.transferControlToOffscreen() this._ctx = this.offScreenCanvas.getContext('2d') // this.onScreenCanvas = document.getElementById("playspace")//.getContext("2d"); this.point = new Point(40, 40) } draw(ctx){ // this.clear(ctx) ctx.fillStyle = '#444'; //set fill color ctx.fillRect(10, 10, 40, 40); this.mouse.point.pen.indicator(ctx) this.point.rotation += 1 this.point.pen.indicator(ctx) } } stage = MainStageOffScreenContext.go()//{ loop: false }) // stage = MainStageOffScreenNoPrimary.go()//{ loop: false }) // stage = MainStage.go()//{ loop: false })