initial commit

1 files changed, 182 insertions, 0 deletions

diff --git a/files/zh-cn/web/api/canvasrenderingcontext2d/imagesmoothingquality/index.html b/files/zh-cn/web/api/canvasrenderingcontext2d/imagesmoothingquality/index.html
new file mode 100644
index 0000000000..fe8fee4b4b
--- /dev/null
+++ b/files/zh-cn/web/api/canvasrenderingcontext2d/imagesmoothingquality/index.html
@@ -0,0 +1,182 @@
+---
+title: CanvasRenderingContext2D.imageSmoothingQuality
+slug: Web/API/CanvasRenderingContext2D/imageSmoothingQuality
+tags:
+  - API
+  - Canvas
+  - CanvasRenderingContext2D
+  - imageSmoothingQuality
+  - 图像平滑度
+translation_of: Web/API/CanvasRenderingContext2D/imageSmoothingQuality
+---
+<div>{{APIRef}} {{SeeCompatTable}}</div>
+
+<p><strong>CanvasRenderingContext2D.imageSmoothingQuality</strong> 是 Canvas 2D API， 用于设置图像平滑度的属性。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><var><em>ctx</em>.</var>imageSmoothingQuality<var> = value
+value</var> = ctx.imageSmoothingQuality</pre>
+
+<h3 id="选项">选项</h3>
+
+<dl>
+ <dt><code>value</code></dt>
+ <dd>"low","medium","high"</dd>
+</dl>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="使用_imageSmoothingQuality_属性">使用 imageSmoothingQuality 属性</h3>
+
+<p>这是一段简单的代码片段，对缩放的图片使用 <code>imageSmoothingQuality </code>属性。</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[7-10]">var canvas = document.getElementById("canvas");
+var ctx = canvas.getContext("2d");
+
+var img = new Image();
+img.src = 'https://mdn.mozillademos.org/files/222/Canvas_createpattern.png';
+img.onload = function() {
+ ctx.mozImageSmoothingEnabled = false;
+ ctx.imageSmoothingQuality = "Medium";
+ ctx.webkitImageSmoothingEnabled = false;
+ ctx.msImageSmoothingEnabled = false;
+ ctx.imageSmoothingEnabled = false;
+ ctx.drawImage(img, 0, 0, 400, 200);
+};</pre>
+
+<p>编辑下面代码，在线查看 Canvas 的变化：</p>
+
+<div class="hidden">
+<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" style="height:140px;"&gt;
+var img = new Image();
+img.src = 'https://mdn.mozillademos.org/files/222/Canvas_createpattern.png';
+img.onload = function() {
+ ctx.mozImageSmoothingEnabled = false;
+ ctx.webkitImageSmoothingEnabled = false;
+ ctx.imageSmoothingQuality = "Medium";
+ ctx.msImageSmoothingEnabled = false;
+ ctx.imageSmoothingEnabled = false;
+ ctx.drawImage(img, 0, 0, 400, 200);
+};&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, 400) }}</p>
+
+<h2 id="规范">规范</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', "#imagesmoothingquality", "imageSmoothingQuality")}}</td>
+   <td>{{Spec2('HTML WHATWG')}}</td>
+   <td>Initial definition.</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>{{CompatChrome(54.0)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatOpera(41)}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Android Webview</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+   <th>Chrome for Android</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatChrome(54.0)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatOperaMobile(41)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatChrome(54.0)}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>接口定义, {{domxref("CanvasRenderingContext2D")}}</li>
+ <li>{{cssxref("image-rendering")}}</li>
+</ul>