initial commit

1 files changed, 161 insertions, 0 deletions

diff --git a/files/zh-cn/web/api/canvasrenderingcontext2d/restore/index.html b/files/zh-cn/web/api/canvasrenderingcontext2d/restore/index.html
new file mode 100644
index 0000000000..c35d6ce849
--- /dev/null
+++ b/files/zh-cn/web/api/canvasrenderingcontext2d/restore/index.html
@@ -0,0 +1,161 @@
+---
+title: CanvasRenderingContext2D.restore()
+slug: Web/API/CanvasRenderingContext2D/restore
+translation_of: Web/API/CanvasRenderingContext2D/restore
+---
+<div>{{APIRef}}</div>
+
+<p><code><strong>CanvasRenderingContext2D</strong></code><strong><code>.restore()</code></strong> 是 Canvas 2D API 通过在绘图状态栈中弹出顶端的状态，将 canvas 恢复到最近的保存状态的方法。 如果没有保存状态，此方法不做任何改变。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">void <var><em>ctx</em>.restore();</var></pre>
+
+<p>更多关于 <a href="/en-US/docs/Web/API/CanvasRenderingContext2D.save#Drawing_state">drawing state</a> 的信息， 请看 {{domxref("CanvasRenderingContext2D.save()")}}。</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="使用_restore_方法">使用 <code>restore</code> 方法</h3>
+
+<p>这是一段简单的代码片段，使用 <code>save()</code> 方法保存默认的状态，使用 <code>restore()</code> 进行恢复。 所以，稍后你可以使用默认的状态绘制一个矩形。</p>
+
+<h4 id="HTML">HTML</h4>
+
+<pre class="brush: html">&lt;canvas id="canvas"&gt;&lt;/canvas&gt;
+</pre>
+
+<h4 id="JavaScript">JavaScript</h4>
+
+<pre class="brush: js; highlight:[9]">var canvas = document.getElementById("canvas");
+var ctx = canvas.getContext("2d");
+
+ctx.save(); // save the default state
+
+ctx.fillStyle = "green";
+ctx.fillRect(10, 10, 100, 100);
+
+ctx.restore(); // restore to the default state
+ctx.fillRect(150, 75, 100, 100);
+</pre>
+
+<p>修改下面的代码并在线查看 canvas 的变化：</p>
+
+<div style="display: none;">
+<h6 id="Playable_code">Playable code</h6>
+
+<pre class="brush: html">&lt;canvas id="canvas" width="400" height="200" class="playable-canvas"&gt;&lt;/canvas&gt;
+&lt;div class="playable-buttons"&gt;
+  &lt;input id="edit" type="button" value="Edit" /&gt;
+  &lt;input id="reset" type="button" value="Reset" /&gt;
+&lt;/div&gt;
+&lt;textarea id="code" class="playable-code"&gt;
+ctx.save();
+ctx.fillStyle = "green";
+ctx.fillRect(10, 10, 100, 100);
+ctx.restore();
+ctx.fillRect(150, 75, 100, 100);&lt;/textarea&gt;
+</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="规范描述">规范描述</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('HTML WHATWG', "scripting.html#dom-context-2d-restore", "CanvasRenderingContext2D.restore")}}</td>
+   <td>{{Spec2('HTML WHATWG')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Chrome for Android</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>接口定义， {{domxref("CanvasRenderingContext2D")}}.</li>
+ <li>{{domxref("CanvasRenderingContext2D.save()")}}</li>
+</ul>