站長(zhǎng)資訊網(wǎng) 本文為大家詳細(xì)介紹下HTML5 Canvas Fill 與Stroke文字效果，基于Canvas如何實(shí)現(xiàn)紋理填充與描邊、顏色填充與描邊，具體代碼如下，感興趣的朋友可以參考下哈，希望對(duì)大家有所幫助 演示HTML5 Canvas Fill 與Stroke文字效果，基于Canvas如何實(shí)現(xiàn)紋理填充與描邊。
一：顏色填充與描邊
顏色填充可以通過(guò)fillStyle來(lái)實(shí)現(xiàn)，描邊顏色可以通過(guò)strokeStyle來(lái)實(shí)現(xiàn)。簡(jiǎn)單示例
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：紋理填充與描邊
HTML5 Canvas還支持紋理填充，通過(guò)加載一張紋理圖像，然后創(chuàng)建畫筆模式，創(chuàng)建紋理模式的API為ctx.createPattern(imageTexture,"repeat");第二參數(shù)支持四個(gè)值，分別為”repeat-x”, ”repeat-y”, ”repeat”,”no-repeat”意思是紋理分別沿著X軸，Y軸，XY方向沿重復(fù)或者不重復(fù)。紋理描邊與填充的代碼如下：
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);
紋理圖片： 
三：運(yùn)行效果 
代碼如下:
<!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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