Canvas文本绘制

时间：2023-12-29 12:13:08

文字绘制；

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>text</title>

</head>

<body>

    <canvas id='myCanvas' width='800' height='400'>

        your browser does not support canvas

    </canvas>

    <script type="text/javascript">

    var c = document.getElementById('myCanvas');

    var cxt = c.getContext('2d');

    cxt.beginPath();

    cxt.font = '30px Arial';

    var txt = 'Hello World';

    cxt.fillText(txt, 100, 50);

    cxt.strokeStyle = 'red';

    cxt.moveTo(100, 50); // 字体坐标是左下角坐标

    cxt.lineTo(300, 50);

    cxt.moveTo(100, 20); // 字体30px不是30像素

    cxt.lineTo(300, 20);

    cxt.font = '30pt Arial';

    cxt.strokeText(txt, 280, 50); // 字体30pt是30像素

    cxt.fillText(txt, 100, 100, 50); // 整个文本宽度50px

    cxt.moveTo(100, 100);

    cxt.lineTo(150, 100); // 文本宽度是50像素

    cxt.stroke();

    // 文本对齐的方式

    cxt.moveTo(100, 150);

    cxt.lineTo(200, 150);

    cxt.moveTo(100, 130);

    cxt.lineTo(200, 130);

    cxt.moveTo(100, 170);

    cxt.lineTo(200, 170);

    cxt.moveTo(150, 120);

    cxt.lineTo(150, 180);

    cxt.stroke();

    cxt.font = '40pt Arial'; // '40pt Courier New'的字体高度与Arial不一样

    cxt.textAlign = 'center'; //center,end,left,right,start

    cxt.textBaseline = 'middle'; //alphabetic,bottom,hanging,ideographic,middle,top

    cxt.fillText('A', 150, 150);

    </script>

</body>

</html>

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