css5 给盒子加内描边怎么写

发布网友发布时间：2022-05-12 04:03

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懂视网时间：2022-05-12 08:24

HTML5 Canvas 填充与描边(Fill And Stroke)

演示HTML5 Canvas Fill 与Stroke文字效果，基于Canvas如何实

现纹理填充与描边。

一：颜色填充与描边

颜色填充可以通过fillStyle来实现，描边颜色可以通过strokeStyle来实现。简单示例

如下：

// fill and stroke text
ctx.font = '60pt Calibri';
ctx.lineWidth = 3;
ctx.strokeStyle = 'green';
ctx.strokeText('Hello World!', 20, 100);
ctx.fillStyle = 'red';
ctx.fillText('Hello World!', 20, 100);

二：纹理填充与描边

HTML5 Canvas还支持纹理填充，通过加载一张纹理图像，然后创建画笔模式，创建

纹理模式的API为ctx.createPattern(imageTexture,"repeat");第二参数支持四个

值，分别为”repeat-x”, ”repeat-y”, ”repeat”,”no-repeat”意思是纹理分别沿着

X轴，Y轴，XY方向沿重复或者不重复。纹理描边与填充的代码如下：

var woodfill = ctx.createPattern(imageTexture,"repeat");
ctx.strokeStyle = woodfill;
ctx.strokeText('Hello World!', 20, 200);
// fill rectangle
ctx.fillStyle = woodfill;
ctx.fillRect(60, 240, 260, 440);

纹理图片：

三：运行效果

代码：

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="chrome=IE8">
<meta http-equiv="Content-type" content="text/html;charset=UTF-8">
<title>Canvas Fill And Stroke Text Demo</title>
<link href="default.css" rel="stylesheet" />
	<script>
		var ctx = null; // global variable 2d context
		var imageTexture = null;
		window.onload = function() {
			var canvas = document.getElementById("text_canvas");
			console.log(canvas.parentNode.clientWidth);
			canvas.width = canvas.parentNode.clientWidth;
			canvas.height = canvas.parentNode.clientHeight;
			
			if (!canvas.getContext) {
			 console.log("Canvas not supported. Please install a HTML5 compatible browser.");
			 return;
			}
			
			// get 2D context of canvas and draw rectangel
			ctx = canvas.getContext("2d");
			ctx.fillStyle="black";
			ctx.fillRect(0, 0, canvas.width, canvas.height);
			
			// fill and stroke text
			ctx.font = '60pt Calibri';
			ctx.lineWidth = 3;
			ctx.strokeStyle = 'green';
			ctx.strokeText('Hello World!', 20, 100);
			ctx.fillStyle = 'red';
			ctx.fillText('Hello World!', 20, 100);
			
			// fill and stroke by pattern
			imageTexture = document.createElement('img');
			imageTexture.src = "../pattern.png";
			imageTexture.onload = loaded();
		}
		
		function loaded() {
			// delay to image loaded
			setTimeout(textureFill, 1000/30);
		}
		
		function textureFill() {
			// var woodfill = ctx.createPattern(imageTexture, "repeat-x");
			// var woodfill = ctx.createPattern(imageTexture, "repeat-y");
			// var woodfill = ctx.createPattern(imageTexture, "no-repeat");
			var woodfill = ctx.createPattern(imageTexture, "repeat");
			ctx.strokeStyle = woodfill;
			ctx.strokeText('Hello World!', 20, 200);
			
			// fill rectangle
			ctx.fillStyle = woodfill;
			ctx.fillRect(60, 240, 260, 440);
		}
		
	</script>
</head>
<body>
	<h1>HTML5 Canvas Text Demo - By Gloomy Fish</h1>
	<pre>Fill And Stroke</pre>
	<p id="my_painter">
		<canvas id="text_canvas"></canvas>
	</p>
</body>
</html>

热心网友时间：2022-05-12 05:32

css5 是何方神圣？

css div描边

border: 1px red solid;
有很多参数，自己百度：css border 和 css outline

CSS3文字描边

text-shadow:#000 1px 0 0,#000 0 1px 0,#000 -1px 0 0,#000 0 -1px 0;
-webkit-text-shadow:#000 1px 0 0,#000 0 1px 0,#000 -1px 0 0,#000 0 -1px 0;
-moz-text-shadow:#000 1px 0 0,#000 0 1px 0,#000 -1px 0 0,#000 0 -1px 0;
*filter: Glow(color=#000, strength=1);

html5描边

HTML5 Canvas 填充与描边(Fill And Stroke)

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="chrome=IE8">
<meta http-equiv="Content-type" content="text/html;charset=UTF-8">
<title>Canvas Fill And Stroke Text Demo</title>
<link href="default.css" rel="stylesheet" />
    <script>
        var ctx = null; // global variable 2d context
        var imageTexture = null;
        window.onload = function() {
            var canvas = document.getElementById("text_canvas");
            console.log(canvas.parentNode.clientWidth);
            canvas.width = canvas.parentNode.clientWidth;
            canvas.height = canvas.parentNode.clientHeight;

            if (!canvas.getContext) {
                console.log("Canvas not supported. Please install a HTML5 compatible browser.");
                return;
            }

            // get 2D context of canvas and draw rectangel
            ctx = canvas.getContext("2d");
            ctx.fillStyle="black";
            ctx.fillRect(0, 0, canvas.width, canvas.height);

            // fill and stroke text
            ctx.font = '60pt Calibri';
            ctx.lineWidth = 3;
            ctx.strokeStyle = 'green';
            ctx.strokeText('Hello World!', 20, 100);
            ctx.fillStyle = 'red';
            ctx.fillText('Hello World!', 20, 100);

            // fill and stroke by pattern
            imageTexture = document.createElement('img');
            imageTexture.src = "../pattern.png";
            imageTexture.onload = loaded();
        }

        function loaded() {
            // delay to image loaded
            setTimeout(textureFill, 1000/30);
        }

        function textureFill() {
            // var woodfill = ctx.createPattern(imageTexture, "repeat-x");
            // var woodfill = ctx.createPattern(imageTexture, "repeat-y");
            // var woodfill = ctx.createPattern(imageTexture, "no-repeat");
            var woodfill = ctx.createPattern(imageTexture, "repeat");
            ctx.strokeStyle = woodfill;
            ctx.strokeText('Hello World!', 20, 200);

            // fill rectangle
            ctx.fillStyle = woodfill;
            ctx.fillRect(60, 240, 260, 440);
        }

    </script>
</head>
<body>
    <h1>HTML5 Canvas Text Demo - By Gloomy Fish</h1>
    <pre>Fill And Stroke</pre>
    <div id="my_painter">
        <canvas id="text_canvas"></canvas>
    </div>
</body>
</html>