| <html> |
| <head> |
| <title>A canvas globalCompositeOperation with shadow</title> |
| <script> |
| var compositeTypes = [ |
| 'overlay', 'darken', 'lighten', 'color-dodge', 'color-burn', 'hard-light', |
| 'soft-light' |
| ]; |
| function draw(){ |
| for (i=0;i<compositeTypes.length;i++){ |
| var label = document.createTextNode(compositeTypes[i]); |
| document.getElementById('lab'+i).appendChild(label); |
| var canvas = document.getElementById('tut'+i); |
| canvas.width = 80; |
| canvas.height = 80; |
| var ctx = canvas.getContext('2d'); |
| |
| // draw rectangle |
| ctx.fillStyle = "#09f"; |
| ctx.fillRect(5,5,45,45); |
| |
| // set composite property |
| ctx.globalCompositeOperation = compositeTypes[i]; |
| |
| // draw rectangle with shadow |
| ctx.fillStyle = "#f30"; |
| ctx.shadowColor = 'blue'; |
| ctx.shadowBlur = 10; |
| ctx.shadowOffsetX = 10; |
| ctx.shadowOffsetY = -10; |
| ctx.fillRect(20,25,45,45); |
| } |
| } |
| </script> |
| <style type="text/css"> |
| body { margin: 20px; font-family: arial,verdana,helvetica; background: #fff;} |
| h1 { font-size: 140%; font-weight:normal; color: #036; border-bottom: 1px solid #ccc; } |
| canvas { border: 2px solid #000; margin-bottom: 5px; } |
| td { padding: 4px; } |
| pre { float:left; display:block; background: rgb(238,238,238); border: 1px dashed #666; padding: 15px 20px; margin: 0 0 10px 0; } |
| </style> |
| </head> |
| <body onload="draw();"> |
| <div> |
| <table> |
| <tr> |
| <td><canvas id="tut0"></canvas><br/><label id="lab0"></label></td> |
| <td><canvas id="tut1"></canvas><br/><label id="lab1"></label></td> |
| <td><canvas id="tut2"></canvas><br/><label id="lab2"></label></td> |
| <td><canvas id="tut3"></canvas><br/><label id="lab3"></label></td> |
| <td><canvas id="tut4"></canvas><br/><label id="lab4"></label></td> |
| <td><canvas id="tut5"></canvas><br/><label id="lab5"></label></td> |
| <td><canvas id="tut6"></canvas><br/><label id="lab6"></label></td> |
| </tr> |
| </table> |
| </div> |
| </body> |
| </html> |
