站长资讯网 本文为大家详细介绍下HTML5 Canvas Fill 与Stroke文字效果，基于Canvas如何实现纹理填充与描边、颜色填充与描边，具体代码如下，感兴趣的朋友可以参考下哈，希望对大家有所帮助 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 
代码如下:
<!DOCTYPE html> <html> <head> <meta http-equiv="X-UA-Compatible" content=" chr ome=IE8"> <meta http-equiv="Content-type" content="text/html;char set =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 inst all 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.li neW idth = 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 set Time out(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>
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