Created
March 15, 2010 08:44
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画像のピクセルデータを■の羅列で塗りなおす
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| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> | |
| <title>TwitterIconPixels</title> | |
| <script type="text/javascript" src="toPixel.js"></script> | |
| </head> | |
| <body onload="init()"> | |
| <h1>Twitter Icon Pixels</h1> | |
| <canvas id="can" width="16" height="16"></canvas> | |
| <pre id="debug"></pre> | |
| </body> | |
| </html> |
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| var canvas, ctx, pre; | |
| var imageSrc = ["data:image/png;base64,", | |
| "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAACXBIWXMAAA7DAAAOwwHHb6hkAAAB", | |
| "20lEQVQ4jY2TvU9TYRTG7yZ/AIPOTPwH4B/gaBydCAkJsDqoi1EGYAAGEggDAyFETRxNHI2DgxoT", | |
| "wwLhu1AKLS29bS/t/Xg/7n18TntTanNNepNf3s/z9Jz3PHWc9DNxDF8btIxFYAwia+EM+iUAQgbs", | |
| "RRbfWwZ/Qguf6zhJBhNJeLGsLT55ET6TD40IeWWhBs1CBArKYKMWYpOskRwFtNGIpByB5SmWZ1lq", | |
| "pkCeAsvVAKtugBWOX5oKvwODX+Rniswvmam2GSLnkcG7io/52wALtz7ecv6mS9CdzxHXZAicUuBF", | |
| "2cdrXnhVbrV5KbTXnT05my41caD63kZKOAwNJnk4K9x0xpnS/ShMFZtYqPqI+rsDbuyHGs+uPTwv", | |
| "3uHplYevLYUGU5XuVIiMRT6kjjNaCyTYDTQeFxp4wuDxywZ+cG3YRvGIZCjY//lCDvcYMJKvY5TB", | |
| "Dy/q2KIfENNMbFuSYtuCGSIi4LHXEuyc1+FQYJgs1QJ8pNAO2SbvSa7/Abtl8NcW6QHnpAonV+tw", | |
| "6vbA/RMXj7hf0hltFN8rGmSCr+0c8/JZ7V6oF55983V2FmJTqXmdVpb3eHDmthlKkUzGWOZdlhN7", | |
| "M9FawWPbjmmuQ3KUIvOm+fdP9heVXWHe5+F6gQAAAABJRU5ErkJggg==", | |
| ].join(""); | |
| function init(){ | |
| canvas = document.getElementById("can"); | |
| pre = document.getElementById("debug"); | |
| ctx = canvas.getContext("2d"); | |
| loadImage(imageSrc, onImageLoad); | |
| } | |
| function onImageLoad(image){ | |
| ctx.drawImage(image, 0, 0); | |
| var pixels = ctx.getImageData(0, 0, canvas.width, canvas.height).data; | |
| var data = []; | |
| var offset = 0; | |
| var str = ""; | |
| for (var y = 0, height = canvas.height; y < height; y++){ | |
| data[y] = []; | |
| for (var x = 0, width = canvas.width; x < width ; x++){ | |
| var r = pixels[offset], | |
| g = pixels[offset+1], | |
| b = pixels[offset+2], | |
| a = pixels[offset+3]; | |
| data[y][x] = [r, g, b, a].join(", "); | |
| str += '<span style="color:rgba(' + [r, g, b].join(",") + ","+ (a/255) + ');">■</sapan>' | |
| offset += 4; | |
| } | |
| log(str + "\n"); | |
| str = ""; | |
| } | |
| window.getSelection().selectAllChildren(pre); | |
| } | |
| function loadImage(src, cbFunc){ | |
| var image = new Image(); | |
| image.onload = function(){ | |
| cbFunc(image); | |
| } | |
| image.src = src; | |
| } | |
| function log(msg){ | |
| pre.innerHTML += msg; | |
| } |
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