Created
June 20, 2014 02:20
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摸清楚
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script type="text/javascript"> | |
| var gCanvas; | |
| var gCtx; | |
| function load(){ | |
| console.log("loaded"); | |
| gCanvas = document.getElementById("mcanvas"); | |
| if (gCanvas.getContext){ | |
| gCtx = gCanvas.getContext("2d"); | |
| } else console.log("no Canvas?"); | |
| } | |
| function doProcess(f){ | |
| var o=[]; | |
| var reader = new FileReader(); | |
| reader.onload = (function(theFile) { | |
| var img = new Image(); | |
| img.src = theFile; | |
| img.onload = function(){ | |
| gCtx.clearRect(0, 0, gCanvas.width, gCanvas.height); | |
| gCtx.drawImage(img,0,0); | |
| } | |
| return; | |
| })(f); | |
| console.log(reader); | |
| reader.readAsDataURL(f); | |
| } | |
| </script> | |
| </head> | |
| <body onload="load()"> | |
| <input type="text" onClick="doProcess('https://www.google.com.br/logos/2012/clara_schuman-2012-hp.jpg')" /> | |
| <canvas id="mcanvas" height="500" width="500"></canvas> | |
| </body> | |
| </html> |
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