Here is my current research
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17.1.MDDN242 PS4
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| license: mit |
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| // note: this file is poorly named - it can generally be ignored. | |
| // helper functions below for supporting blocks/purview | |
| function saveBlocksImages(doZoom) { | |
| if(doZoom == null) { | |
| doZoom = false; | |
| } | |
| // generate 960x500 preview.jpg of entire canvas | |
| // TODO: should this be recycled? | |
| var offscreenCanvas = document.createElement('canvas'); | |
| offscreenCanvas.width = 960; | |
| offscreenCanvas.height = 500; | |
| var context = offscreenCanvas.getContext('2d'); | |
| // background is flat white | |
| context.fillStyle="#FFFFFF"; | |
| context.fillRect(0, 0, 960, 500); | |
| context.drawImage(this.canvas, 0, 0, 960, 500); | |
| // save to browser | |
| var downloadMime = 'image/octet-stream'; | |
| var imageData = offscreenCanvas.toDataURL('image/jpeg'); | |
| imageData = imageData.replace('image/jpeg', downloadMime); | |
| p5.prototype.downloadFile(imageData, 'preview.jpg', 'jpg'); | |
| // generate 230x120 thumbnail.png centered on mouse | |
| offscreenCanvas.width = 230; | |
| offscreenCanvas.height = 120; | |
| // background is flat white | |
| context = offscreenCanvas.getContext('2d'); | |
| context.fillStyle="#FFFFFF"; | |
| context.fillRect(0, 0, 230, 120); | |
| if(doZoom) { | |
| // pixelDensity does the right thing on retina displays | |
| var pd = this._pixelDensity; | |
| var sx = pd * mouseX - pd * 230/2; | |
| var sy = pd * mouseY - pd * 120/2; | |
| var sw = pd * 230; | |
| var sh = pd * 120; | |
| // bounds checking - just displace if necessary | |
| if (sx < 0) { | |
| sx = 0; | |
| } | |
| if (sx > this.canvas.width - sw) { | |
| sx = this.canvas.width - sw; | |
| } | |
| if (sy < 0) { | |
| sy = 0; | |
| } | |
| if (sy > this.canvas.height - sh) { | |
| sy = this.canvas.height - sh; | |
| } | |
| // save to browser | |
| context.drawImage(this.canvas, sx, sy, sw, sh, 0, 0, 230, 120); | |
| } | |
| else { | |
| // now scaledown | |
| var full_width = this.canvas.width; | |
| var full_height = this.canvas.height; | |
| context.drawImage(this.canvas, 0, 0, full_width, full_height, 0, 0, 230, 120); | |
| } | |
| imageData = offscreenCanvas.toDataURL('image/png'); | |
| imageData = imageData.replace('image/png', downloadMime); | |
| p5.prototype.downloadFile(imageData, 'thumbnail.png', 'png'); | |
| } |
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| <head> | |
| <style> body {padding: 0; margin: 0;} </style> | |
| </head> | |
| <body style="background-color:white"> | |
| <img src="preview.jpg" width="960" height="500"/> | |
| </body> |
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| { | |
| "commits": [ | |
| { | |
| "sha": "13b093cbf9ca07656edde96c522c8f0154668f19", | |
| "name": "research" | |
| } | |
| ] | |
| } |
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| <head> | |
| <script src="http://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.7/p5.js"></script> | |
| <script src="http://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.7/addons/p5.dom.js"></script> | |
| <script language="javascript" type="text/javascript" src=".purview_helper.js"></script> | |
| <script language="javascript" type="text/javascript" src="clock.js"></script> | |
| <script language="javascript" type="text/javascript" src="sketch.js"></script> | |
| </head> | |
| <body style="background-color:white"> | |
| <div class="outer"> | |
| <div class="inner"> | |
| <div id="canvasContainer"></div> | |
| </div> | |
| </div> | |
| </table> | |
| </body> |
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| var canvasWidth = 960; | |
| var canvasHeight = 500; | |
| function setup () { | |
| // create the drawing canvas, save the canvas element | |
| var main_canvas = createCanvas(canvasWidth, canvasHeight); | |
| main_canvas.parent('canvasContainer'); | |
| // this means draw will only be called once | |
| noLoop(); | |
| } | |
| // draw five colors and then five glyphs | |
| function draw () { | |
| background(255, 255, 220); | |
| stroke(0); | |
| strokeWeight(4); | |
| line(320, 0, 320, canvasHeight); | |
| line(640, 0, 640, canvasHeight); | |
| } | |
| function keyTyped() { | |
| if (key == '!') { | |
| saveBlocksImages(); | |
| } | |
| else if (key == '@') { | |
| saveBlocksImages(true); | |
| } | |
| } |
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