使用下列方法透過 HTML5 Canvas 建立圖案:createPattern(image, repetition)− 此方法將使用圖片來建立圖案。第二個參數可以是具有以下值之一的字串:repeat、repeat-x、repeat-y 和 no-repeat。如果指定空字串或 null,則將假定重複。
您可以嘗試執行以下程式碼來了解如何建立一個模式 -
<!DOCTYPE HTML> <html> <head> <style> #test { width:100px; height:100px; margin: 0px auto; } </style> <script> function drawShape(){ // get the canvas element using the DOM var canvas = document.getElementById('mycanvas'); // Make sure we don't execute when canvas isn't supported if (canvas.getContext){ // use getContext to use the canvas for drawing var ctx = canvas.getContext('2d'); // create new image object to use as pattern var img = new Image(); img.src = 'images/pattern.jpg'; img.onload = function(){ // create pattern var ptrn = ctx.createPattern(img,'repeat'); ctx.fillStyle = ptrn; ctx.fillRect(0,0,150,150); } } else { alert('You need Safari or Firefox 1.5+ to see this demo.'); } } </script> </head> <body id = "test" onload = "drawShape();"> <canvas id = "mycanvas"></canvas> </body> </html>
以上是使用HTML5 Canvas建立一個圖案的詳細內容。更多資訊請關注PHP中文網其他相關文章!