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codegolf SE 33569 - try 1
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>35569</title> | |
| </head> | |
| <body> | |
| <canvas id="cv"></canvas> | |
| <script src="script.js"></script> | |
| </body> | |
| </html> |
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| var SIZE = 1024; | |
| var cv = document.getElementById("cv"); | |
| cv.width = SIZE; | |
| cv.height = SIZE; | |
| cv.style.position = "fixed"; | |
| cv.style.left = "0px"; | |
| cv.style.top = "0px"; | |
| document.body.appendChild(cv); | |
| var ctx = cv.getContext("2d"); | |
| var image_data = ctx.getImageData(0, 0, SIZE, SIZE); | |
| var data = image_data.data; | |
| var x = 0, y = 0; | |
| for(var i = 0, len = data.length ; i < len ; ) { | |
| data[i++] = red(x, y) & 255; | |
| data[i++] = green(x, y) & 255; | |
| data[i++] = blue(x, y) & 255; | |
| data[i++] = 255; | |
| if(++x === SIZE) { | |
| x = 0; | |
| y++; | |
| } | |
| } | |
| ctx.putImageData(image_data, 0, 0); | |
| function red(x, y) { | |
| return x + y; | |
| } | |
| function green(x, y) { | |
| return 256 + x - y; | |
| } | |
| function blue(x, y) { | |
| return x * y; | |
| } |
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