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An example of using canvas methods save() an restore()
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| var canvas; | |
| var ctx; | |
| function init() { | |
| canvas = document.getElementById("canvas"); | |
| ctx = canvas.getContext("2d"); | |
| draw(); | |
| } | |
| function draw() { | |
| ctx.fillStyle = '#FA6900'; | |
| ctx.shadowOffsetX = 5; | |
| ctx.shadowOffsetY = 5; | |
| ctx.shadowBlur = 4; | |
| ctx.shadowColor = 'rgba(204, 204, 204, 0.5)'; | |
| ctx.fillRect(0,0,15,150); | |
| ctx.save(); | |
| ctx.fillStyle = '#E0E4CD'; | |
| ctx.shadowOffsetX = 10; | |
| ctx.shadowOffsetY = 10; | |
| ctx.shadowBlur = 4; | |
| ctx.shadowColor = 'rgba(204, 204, 204, 0.5)'; | |
| ctx.fillRect(30,0,30,150); | |
| ctx.save(); | |
| ctx.fillStyle = '#A7DBD7'; | |
| ctx.shadowOffsetX = 15; | |
| ctx.shadowOffsetY = 15; | |
| ctx.shadowBlur = 4; | |
| ctx.shadowColor = 'rgba(204, 204, 204, 0.5)'; | |
| ctx.fillRect(90,0,45,150); | |
| ctx.save(); | |
| ctx.restore(); | |
| ctx.beginPath(); | |
| ctx.arc(185, 75, 22, 0, Math.PI*2, true); | |
| ctx.closePath(); | |
| ctx.fill(); | |
| ctx.restore(); | |
| ctx.beginPath(); | |
| ctx.arc(260, 75, 15, 0, Math.PI*2, true); | |
| ctx.closePath(); | |
| ctx.fill(); | |
| ctx.restore(); | |
| ctx.beginPath(); | |
| ctx.arc(305, 75, 8, 0, Math.PI*2, true); | |
| ctx.closePath(); | |
| ctx.fill(); | |
| } | |
| init(); |
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <title>Canvas Test</title> | |
| </head> | |
| <body> | |
| <header> </header> | |
| <nav> </nav> | |
| <section> | |
| <div> | |
| <canvas id="canvas" width="320" height="200"> | |
| This text is displayed if your browser does not support HTML5 Canvas. | |
| </canvas> | |
| </div> | |
| </section> | |
| <aside> </aside> | |
| <footer> </footer> | |
| </body> | |
| </html> |
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This source code comes from http://html5.litten.com/understanding-save-and-restore-for-the-canvas-context/