(img)
| 51 | |
| 52 | |
| 53 | function toCanvas(img){ |
| 54 | var canvas = document.createElement('canvas'); |
| 55 | if( img ){ |
| 56 | canvas.width = img.width || img.videoWidth; |
| 57 | canvas.height = img.height || img.videoHeight; |
| 58 | var ctx = canvas.getContext('2d'); |
| 59 | try { |
| 60 | ctx.drawImage(img, 0, 0); |
| 61 | } catch (err){ |
| 62 | console.log(err.toString()); |
| 63 | console.log(err.stack); |
| 64 | } |
| 65 | } |
| 66 | return canvas; |
| 67 | } |
| 68 | |
| 69 | |
| 70 | function imageEqual(left, right, text, callback, delta){ |