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diff --git a/files/zh-tw/web/api/canvas_api/index.html b/files/zh-tw/web/api/canvas_api/index.html new file mode 100644 index 0000000000..c07ec36738 --- /dev/null +++ b/files/zh-tw/web/api/canvas_api/index.html @@ -0,0 +1,158 @@ +--- +title: Canvas API +slug: Web/API/Canvas_API +translation_of: Web/API/Canvas_API +--- +<div>{{CanvasSidebar}}</div> + +<p class="summary"><strong>{{HTMLElement("canvas")}}</strong> 是 <a href="/zh-TW/docs/HTML" title="HTML">HTML5</a> 的新元素，可透過 Script（通常是 <a href="/zh-TW/docs/JavaScript" title="JavaScript">JavaScript</a>）繪製圖形。例如，可以用來繪圖、合成圖照片、建立動畫、甚至處理即時的影片播放。</p> + +<p>Mozilla 應用程式從 Gecko 1.8（也就是 <a href="/en/Firefox_1.5_for_developers" title="Firefox_1.5_for_developers">Firefox 1.5</a>）起開始支援 <code><canvas></code>。這個元素最初由蘋果 OS X <a class="external" href="http://www.apple.com/macosx/features/dashboard/">Dashboard</a> 和 Safari 引入。Internet Explorer 9 以上版本也有支援<code> <canvas></code>，但較舊的 IE 版本則須嵌入 Google <a class="external" href="http://excanvas.sourceforge.net/">Explorer Canvas</a> 專案中的程式腳本，才能得到有效的支援。Opera 9 也支援 <code><canvas></code>。</p> + +<p><code><canvas></code> 元素通常也被 <a href="/zh-TW/docs/Web/WebGL">WebGL</a> 用來在網頁上顯示使用硬體加速繪製的 3D 圖形。</p> + +<h2 id="範例">範例</h2> + +<p>這則簡單的範例使用了{{domxref("CanvasRenderingContext2D.fillRect()")}}這個方法。</p> + +<h3 id="HTML">HTML</h3> + +<pre class="brush: html"><canvas id="canvas"></canvas> +</pre> + +<h3 id="JavaScript">JavaScript</h3> + +<pre class="brush: js">var canvas = document.getElementById("canvas"); +var ctx = canvas.getContext("2d"); + +ctx.fillStyle = "green"; +ctx.fillRect(10, 10, 100, 100); +</pre> + +<p>Edit the code below and see your changes update live in the canvas:</p> + +<div class="hidden"> +<h6 id="Playable_code">Playable code</h6> + +<pre class="brush: html"><canvas id="canvas" width="400" height="200" class="playable-canvas"></canvas> +<div class="playable-buttons"> + <input id="edit" type="button" value="Edit" /> + <input id="reset" type="button" value="Reset" /> +</div> +<textarea id="code" class="playable-code"> +ctx.fillStyle = "green"; +ctx.fillRect(10, 10, 100, 100);</textarea> +</pre> + +<pre class="brush: js">var canvas = document.getElementById("canvas"); +var ctx = canvas.getContext("2d"); +var textarea = document.getElementById("code"); +var reset = document.getElementById("reset"); +var edit = document.getElementById("edit"); +var code = textarea.value; + +function drawCanvas() { + ctx.clearRect(0, 0, canvas.width, canvas.height); + eval(textarea.value); +} + +reset.addEventListener("click", function() { + textarea.value = code; + drawCanvas(); +}); + +edit.addEventListener("click", function() { + textarea.focus(); +}) + +textarea.addEventListener("input", drawCanvas); +window.addEventListener("load", drawCanvas); +</pre> +</div> + +<p>{{ EmbedLiveSample('Playable_code', 700, 360) }}</p> + +<h2 id="參考">參考</h2> + +<div class="index"> +<ul> + <li>{{domxref("HTMLCanvasElement")}}</li> + <li>{{domxref("CanvasRenderingContext2D")}}</li> + <li>{{domxref("CanvasGradient")}}</li> + <li>{{domxref("CanvasPattern")}}</li> + <li>{{domxref("ImageBitmap")}}</li> + <li>{{domxref("ImageData")}}</li> + <li>{{domxref("TextMetrics")}}</li> + <li>{{domxref("Path2D")}} {{experimental_inline}}</li> +</ul> +</div> + +<p>這些與<code>WebGLRenderingContext</code>有關的標識，皆引用在<a href="/zh-TW/docs/Web/WebGL" title="/zh-TW/docs/Web/WebGL">WebGL</a></p> + +<h2 id="教程指南">教程指南</h2> + +<dl> + <dt><a href="/zh-TW/docs/Web/API/Canvas_API/Tutorial">Canvas tutorial</a></dt> + <dd>這個全部的課程包含 <code><canvas></code> 基礎的使用和高階的應用。</dd> + <dt><a href="/zh-TW/Add-ons/Code_snippets/Canvas">Code snippets: Canvas</a></dt> + <dd>一些延伸的開發功能，包含<code><canvas></code>。</dd> + <dt><a href="/zh-TW/docs/Web/API/Canvas_API/A_basic_ray-caster">Demo: A basic ray-caster</a></dt> + <dd>使用<code><canvas></code>做的光線追蹤(ray-tracing )範例。</dd> + <dt><a href="/zh-TW/docs/Web/API/Canvas_API/Drawing_DOM_objects_into_a_canvas">Drawing DOM objects into a canvas</a></dt> + <dd>如何在 DOM<code><canvas></code>之中，畫個物件。例如 HTML的元素。</dd> + <dt><a href="/zh-TW/docs/Web/API/Canvas_API/Manipulating_video_using_canvas">Manipulating video using canvas</a></dt> + <dd>結合{{HTMLElement("video")}} 和 {{HTMLElement("canvas")}} 去控制影像資料的真實時間</dd> +</dl> + +<h2 id="資源">資源</h2> + +<h3 id="Generic">Generic</h3> + +<ul> + <li><a href="http://joshondesign.com/p/books/canvasdeepdive/title.html">HTML5 Canvas Deep Dive</a></li> + <li><a href="http://bucephalus.org/text/CanvasHandbook/CanvasHandbook.html">Canvas Handbook</a></li> +</ul> + +<h3 id="Libraries">Libraries</h3> + +<ul> + <li><a href="http://fabricjs.com">Fabric.js</a> is an open-source canvas library with SVG parsing capabilities.</li> + <li><a href="https://github.com/ericdrowell/KineticJS">Kinetic.js</a> is an open-source canvas library focused on interactivity for desktop and mobile applications.</li> + <li><a href="http://paperjs.org/">Paper.js</a> is an open source vector graphics scripting framework that runs on top of the HTML5 Canvas.</li> + <li><a href="http://origamijs.com/docs/">Origami.js</a> is an open source lightweight canvas library.</li> + <li><a href="http://libcanvas.github.com/">libCanvas</a> 是一個強大且輕量化的 canvas 框架。</li> + <li><a href="http://processingjs.org">Processing.js</a> 是視覺化程式語言 Processing 的移植版。</li> + <li><a href="https://playcanvas.com/">PlayCanvas</a> is an open source game engine.</li> + <li><a href="http://www.pixijs.com/">Pixi.js</a> is an open source game engine.</li> + <li><a href="http://www.liquidx.net/plotkit/">PlotKit</a> 是一個製作圖表和圖形的函式庫。</li> + <li><a class="link-https" href="https://github.com/jeremyckahn/rekapi">Rekapi</a> 是一個用來控制動畫影格的 Canvas API。</li> + <li><a href="http://senchalabs.github.com/philogl/">PhiloGL</a> 是一個可應用在資料視覺化、遊戲開發的 WebGL 框架。</li> + <li><a href="http://thejit.org/">JavaScript InfoVis Toolkit</a> 可在網頁上建立 2D 的互動式 Canvas 視覺化資料。</li> + <li><a href="http://www.createjs.com/easeljs">EaselJS</a> 是一個自由 / 開放源始碼的函式庫，目的在簡化 canvas 於遊戲與美術的開發難度，類似 Flash API。</li> + <li><a href="http://scrawl.rikweb.org.uk/">Scrawl-canvas</a> is another open-source javascript library for creating and manipulating 2d canvas elements</li> +</ul> + +<h2 id="規範">規範</h2> + +<table class="standard-table"> + <thead> + <tr> + <th scope="col">Specification</th> + <th scope="col">Status</th> + <th scope="col">Comment</th> + </tr> + </thead> + <tbody> + <tr> + <td>{{SpecName('HTML WHATWG', "the-canvas-element.html", "Canvas")}}</td> + <td>{{Spec2('HTML WHATWG')}}</td> + <td> </td> + </tr> + </tbody> +</table> + +<h2 id="參見">參見</h2> + +<ul> + <li><a href="/zh-TW/docs/Web/WebGL">WebGL</a></li> +</ul> |