Created
November 29, 2014 13:25
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Save anonymous/d4a4a7998dc7a0f3f140 to your computer and use it in GitHub Desktop.
// source http://jsbin.com/hahopivaqa
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>JS Bin</title> | |
| <style id="jsbin-css"> | |
| canvas { | |
| filter: url(#svgBlur); | |
| filter: blur(1px); | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <input id="input" type="file" /> | |
| <svg height="0" xmlns="http://www.w3.org/2000/svg"> | |
| <filter id="svgBlur" x="-5%" y="-5%" width="110%" height="110%"> | |
| <feGaussianBlur in="SourceGraphic" stdDeviation="1"/> | |
| </filter> | |
| </svg> | |
| <script id="jsbin-javascript"> | |
| var input = document.getElementById("input"); | |
| // Wait for input | |
| input.addEventListener("change", function(e) { | |
| var file = e.target.files[0]; | |
| // Only process image files. | |
| if (!file.type.match('image.*')) { | |
| return; | |
| } | |
| // Create image from file (blob) | |
| var img = new Image(); | |
| img.src = URL.createObjectURL(file); | |
| img.onload = function() { | |
| var maxHeight = 200, | |
| maxWidth = 300, | |
| origRatio = img.height / img.width, | |
| newWidth = maxWidth, | |
| newHeight = maxHeight; | |
| if(origRatio > 1) { | |
| // Height > Width | |
| newWidth = (img.width / img.height) * newHeight; | |
| } else if(origRatio < 1) { | |
| // Width > Height | |
| newHeight = (img.height / img.width) * newWidth; | |
| } else { | |
| // Width = Height | |
| } | |
| var scaleHeight = newHeight / img.height, | |
| scaleWidth = newWidth / img.width; | |
| // Create canvas with img's height and width | |
| var canvas = document.createElement("canvas"); | |
| canvas.height = newHeight; | |
| canvas.width = newWidth; | |
| var ctx = canvas.getContext("2d"); | |
| //ctx.scale(scaleWidth, scaleHeight); | |
| ctx.transform(scaleWidth, 0, 0, scaleHeight, 0, 0); | |
| ctx.drawImage(img, 0, 0); | |
| document.body.appendChild(canvas); | |
| }; | |
| }); | |
| </script> | |
| <script id="jsbin-source-css" type="text/css">canvas { | |
| filter: url(#svgBlur); | |
| filter: blur(1px); | |
| }</script> | |
| <script id="jsbin-source-javascript" type="text/javascript">var input = document.getElementById("input"); | |
| // Wait for input | |
| input.addEventListener("change", function(e) { | |
| var file = e.target.files[0]; | |
| // Only process image files. | |
| if (!file.type.match('image.*')) { | |
| return; | |
| } | |
| // Create image from file (blob) | |
| var img = new Image(); | |
| img.src = URL.createObjectURL(file); | |
| img.onload = function() { | |
| var maxHeight = 200, | |
| maxWidth = 300, | |
| origRatio = img.height / img.width, | |
| newWidth = maxWidth, | |
| newHeight = maxHeight; | |
| if(origRatio > 1) { | |
| // Height > Width | |
| newWidth = (img.width / img.height) * newHeight; | |
| } else if(origRatio < 1) { | |
| // Width > Height | |
| newHeight = (img.height / img.width) * newWidth; | |
| } else { | |
| // Width = Height | |
| } | |
| var scaleHeight = newHeight / img.height, | |
| scaleWidth = newWidth / img.width; | |
| // Create canvas with img's height and width | |
| var canvas = document.createElement("canvas"); | |
| canvas.height = newHeight; | |
| canvas.width = newWidth; | |
| var ctx = canvas.getContext("2d"); | |
| //ctx.scale(scaleWidth, scaleHeight); | |
| ctx.transform(scaleWidth, 0, 0, scaleHeight, 0, 0); | |
| ctx.drawImage(img, 0, 0); | |
| document.body.appendChild(canvas); | |
| }; | |
| });</script></body> | |
| </html> |
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| canvas { | |
| filter: url(#svgBlur); | |
| filter: blur(1px); | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| var input = document.getElementById("input"); | |
| // Wait for input | |
| input.addEventListener("change", function(e) { | |
| var file = e.target.files[0]; | |
| // Only process image files. | |
| if (!file.type.match('image.*')) { | |
| return; | |
| } | |
| // Create image from file (blob) | |
| var img = new Image(); | |
| img.src = URL.createObjectURL(file); | |
| img.onload = function() { | |
| var maxHeight = 200, | |
| maxWidth = 300, | |
| origRatio = img.height / img.width, | |
| newWidth = maxWidth, | |
| newHeight = maxHeight; | |
| if(origRatio > 1) { | |
| // Height > Width | |
| newWidth = (img.width / img.height) * newHeight; | |
| } else if(origRatio < 1) { | |
| // Width > Height | |
| newHeight = (img.height / img.width) * newWidth; | |
| } else { | |
| // Width = Height | |
| } | |
| var scaleHeight = newHeight / img.height, | |
| scaleWidth = newWidth / img.width; | |
| // Create canvas with img's height and width | |
| var canvas = document.createElement("canvas"); | |
| canvas.height = newHeight; | |
| canvas.width = newWidth; | |
| var ctx = canvas.getContext("2d"); | |
| //ctx.scale(scaleWidth, scaleHeight); | |
| ctx.transform(scaleWidth, 0, 0, scaleHeight, 0, 0); | |
| ctx.drawImage(img, 0, 0); | |
| document.body.appendChild(canvas); | |
| }; | |
| }); |
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