var canvas = document.getElementById("canvas"), ctx = canvas.getContext("2d"), img = new Image(), effectEl = document.getElementById("effect"), settings = { radius: 4, intensity: 25, ApplyFilter: function() { doOilPaintEffect(); } } img.addEventListener('load', function() { // reduced the size by half for pen and performance. canvas.width = (this.width / 2); canvas.height = (this.height / 2); ctx.drawImage(this, 0, 0, canvas.width, canvas.height); doOilPaintEffect(); }); function choosePhoto(){ window["reddahApi"].album().then(data=>{ alert(data) img.src=data.replace("file://","http://localhost:8080/_app_file_"); alert(img.src) alert(3) canvas.width = (this.width / 2); canvas.height = (this.height / 2); ctx.drawImage(this, 0, 0, canvas.width, canvas.height); doOilPaintEffect(); alert(3) }) } img.crossOrigin = "Anonymous"; img.src = "assets/500/501.jpeg"; //"https://wow.techbrood.com/uploads/161001/normal2.jpg"; //var gui = new dat.GUI(); //gui.add(settings, 'intensity'); //gui.add(settings, 'radius'); //gui.add(settings, 'ApplyFilter'); function doOilPaintEffect() { oilPaintEffect(canvas, settings.radius, settings.intensity); } function oilPaintEffect(canvas, radius, intensity) { var width = canvas.width, height = canvas.height, imgData = ctx.getImageData(0, 0, width, height), pixData = imgData.data, // change to createElement getting added element just for the demo destCanvas = document.getElementById("dest-canvas"), dCtx = destCanvas.getContext("2d"), pixelIntensityCount = []; destCanvas.width = width; destCanvas.height = height; var destImageData = dCtx.createImageData(width, height), destPixData = destImageData.data, intensityLUT = [], rgbLUT = []; for (var y = 0; y < height; y++) { intensityLUT[y] = []; rgbLUT[y] = []; for (var x = 0; x < width; x++) { var idx = (y * width + x) * 4, r = pixData[idx], g = pixData[idx + 1], b = pixData[idx + 2], avg = (r + g + b) / 3; intensityLUT[y][x] = Math.round((avg * intensity) / 255); rgbLUT[y][x] = { r: r, g: g, b: b }; } } for (y = 0; y < height; y++) { for (x = 0; x < width; x++) { pixelIntensityCount = []; // Find intensities of nearest pixels within radius. for (var yy = -radius; yy <= radius; yy++) { for (var xx = -radius; xx <= radius; xx++) { if (y + yy > 0 && y + yy < height && x + xx > 0 && x + xx < width) { var intensityVal = intensityLUT[y + yy][x + xx]; if (!pixelIntensityCount[intensityVal]) { pixelIntensityCount[intensityVal] = { val: 1, r: rgbLUT[y + yy][x + xx].r, g: rgbLUT[y + yy][x + xx].g, b: rgbLUT[y + yy][x + xx].b } } else { pixelIntensityCount[intensityVal].val++; pixelIntensityCount[intensityVal].r += rgbLUT[y + yy][x + xx].r; pixelIntensityCount[intensityVal].g += rgbLUT[y + yy][x + xx].g; pixelIntensityCount[intensityVal].b += rgbLUT[y + yy][x + xx].b; } } } } pixelIntensityCount.sort(function(a, b) { return b.val - a.val; }); var curMax = pixelIntensityCount[0].val, dIdx = (y * width + x) * 4; destPixData[dIdx] = ~~(pixelIntensityCount[0].r / curMax); destPixData[dIdx + 1] = ~~(pixelIntensityCount[0].g / curMax); destPixData[dIdx + 2] = ~~(pixelIntensityCount[0].b / curMax); destPixData[dIdx + 3] = 255; } } // change this to ctx to instead put the data on the original canvas dCtx.putImageData(destImageData, 0, 0); } window["reddahApi"].loadCompleted()
body {
text-align: center;
background: #ececec;
font-family: Tahoma, Geneva, sans-serif
}
section {
display: inline-block
}
canvas {
border: 1px solid #000
}
submitted 7 years ago ago by 1b54d14be50240948fc53b199a461f52