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author | MDN <actions@users.noreply.github.com> | 2021-09-01 00:52:00 +0000 |
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committer | MDN <actions@users.noreply.github.com> | 2021-09-01 00:52:00 +0000 |
commit | af3288b106f44aaaa2c80d499ec669383d6f7203 (patch) | |
tree | 6d5a402249e4e8a83820c2592887062ec9202d79 /files/zh-cn/web/api/windoworworkerglobalscope/createimagebitmap | |
parent | 1768b43f574673545e1f2a20e92a27b050a2bb53 (diff) | |
download | translated-content-af3288b106f44aaaa2c80d499ec669383d6f7203.tar.gz translated-content-af3288b106f44aaaa2c80d499ec669383d6f7203.tar.bz2 translated-content-af3288b106f44aaaa2c80d499ec669383d6f7203.zip |
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Diffstat (limited to 'files/zh-cn/web/api/windoworworkerglobalscope/createimagebitmap')
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diff --git a/files/zh-cn/web/api/windoworworkerglobalscope/createimagebitmap/index.html b/files/zh-cn/web/api/windoworworkerglobalscope/createimagebitmap/index.html deleted file mode 100644 index 7d55152960..0000000000 --- a/files/zh-cn/web/api/windoworworkerglobalscope/createimagebitmap/index.html +++ /dev/null @@ -1,207 +0,0 @@ ---- -title: self.createImageBitmap() -slug: Web/API/WindowOrWorkerGlobalScope/createImageBitmap -translation_of: Web/API/WindowOrWorkerGlobalScope/createImageBitmap ---- -<div>{{APIRef("Canvas API")}}</div> - -<p><code><strong>createImageBitmap</strong></code> 方法存在 windows 和 workers 中. 它接受各种不同的图像来源, 并返回一个{{domxref("Promise")}}, resolve为{{domxref("ImageBitmap")}}. 可选地参数,图像被剪裁成自(sx,sy)且宽度为sw,高度为sh的像素的矩形。</p> - -<h2 id="Syntax">Syntax</h2> - -<pre>createImageBitmap(<em>image</em>[, options]).then(function(response) { ... }); -createImageBitmap(<em>image, sx, sy, sw, sh</em>[, options]).then(function(response) { ... }); -</pre> - -<h3 id="Parameters">Parameters</h3> - -<dl> - <dt><code>image</code></dt> - <dd>一个图像源, 可以是一个 {{HTMLElement("img")}}, SVG {{SVGElement("image")}}, {{HTMLElement("video")}}, {{HTMLElement("canvas")}}, {{domxref("HTMLImageElement")}}, {{domxref("SVGImageElement")}}, {{domxref("HTMLVideoElement")}}, {{domxref("HTMLCanvasElement")}}, {{domxref("Blob")}}, {{domxref("ImageData")}}, {{domxref("ImageBitmap")}}, 或 {{domxref("OffscreenCanvas")}} 对象.</dd> - <dt><code>sx</code></dt> - <dd>裁剪点x坐标.</dd> - <dt><code>sy</code></dt> - <dd>裁剪点y坐标.</dd> - <dt><code>sw</code></dt> - <dd>裁剪宽度,值可为负数.</dd> - <dt><code>sh</code></dt> - <dd>裁剪高度,值可为负数.</dd> - <dt>options {{optional_inline}}</dt> - <dd>为其设置选项的对象。可用的选项是: - <ul> - <li><code>imageOrientation</code>: 指示图像是按原样呈现还是垂直翻转. <code>none</code> (默认不翻转) 或 <code>flipY</code>.</li> - <li><code>premultiplyAlpha</code>: 指示位图颜色通道由alpha通道预乘. 选择其一:<code>none</code>, <code>premultiply</code>, 或 <code>default</code> (默认).</li> - <li><code>colorSpaceConversion</code>: 指示图像是否使用色彩空间转换进行解码. <code>none</code> 或 <code>default</code> (默认). The value <code>default</code> indicates that implementation-specific behavior is used.</li> - <li><code>resizeWidth</code>: 指示新宽度的长整数。</li> - <li><code>resizeHeight</code>: 指示新高度的长整数。</li> - <li><code>resizeQuality</code>: 指定图像缩放算法. 选择其一<code>pixelated</code>, <code>low</code> (默认), <code>medium</code>, 或 <code>high</code>.</li> - </ul> - </dd> -</dl> - -<h3 id="Return_value">Return value</h3> - -<p>返回一个解决ImageBitmap的{{domxref("Promise")}} ,当Promise成功时resolves接收一个包含所得到的矩形的位图数据{{domxref("ImageBitmap")}}。</p> - -<h2 id="Example">Example</h2> - -<pre class="brush: js language-js">var canvas = document.getElementById('myCanvas'), -ctx = canvas.getContext('2d'), -image = new Image(); - -image.onload = function() { - Promise.all([ - createImageBitmap(this, 0, 0, 32, 32), - createImageBitmap(this, 32, 0, 32, 32) - ]).then(function(sprites) { - ctx.drawImage(sprites[0], 0, 0); - ctx.drawImage(sprites[1], 32, 32); - }); -} - -image.src = 'sprites.png'; -</pre> - -<h2 id="Specifications">Specifications</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', "webappapis.html#dom-createimagebitmap", "createImageBitmap")}}</td> - <td>{{Spec2('HTML WHATWG')}}</td> - <td> </td> - </tr> - </tbody> -</table> - -<h2 id="Browser_compatibility">Browser compatibility</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>Edge</th> - <th>Internet Explorer</th> - <th>Opera</th> - <th>Safari</th> - </tr> - <tr> - <td>Basic support</td> - <td>{{CompatChrome(50)}}</td> - <td> - <p>{{CompatGeckoDesktop(42)}}<br> - {{CompatGeckoDesktop(52)}}<sup>[1]</sup></p> - </td> - <td>{{CompatNo}}</td> - <td>{{CompatNo}}</td> - <td>{{CompatVersionUnknown}}</td> - <td>{{CompatNo}}</td> - </tr> - <tr> - <td><code>options</code> parameter</td> - <td>{{CompatChrome(52)}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatNo}}</td> - <td>{{CompatNo}}</td> - <td>39</td> - <td>{{CompatNo}}</td> - </tr> - <tr> - <td><code>resizeWidth</code>, <code>resizeHeight</code>, and <code>resizeQuality</code></td> - <td>{{CompatChrome(54)}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatNo}}</td> - <td>{{CompatNo}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatNo}}</td> - </tr> - <tr> - <td><code>SVGImageElement</code> as source image</td> - <td>{{CompatChrome(59)}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatNo}}</td> - <td>{{CompatNo}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatNo}}</td> - </tr> - </tbody> -</table> -</div> - -<div id="compat-mobile"> -<table class="compat-table"> - <tbody> - <tr> - <th>Feature</th> - <th>Android Webview</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>{{CompatChrome(50)}}</td> - <td>{{CompatChrome(50)}}</td> - <td> - <p>{{CompatGeckomobile(42)}}<br> - {{CompatGeckoMobile(52)}}<sup>[1]</sup></p> - </td> - <td>{{CompatUnknown}}</td> - <td>{{CompatVersionUnknown}}</td> - <td>{{CompatUnknown}}</td> - </tr> - <tr> - <td><code>options</code> parameter</td> - <td>{{CompatChrome(52)}}</td> - <td>{{CompatChrome(52)}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - <td>39</td> - <td>{{CompatUnknown}}</td> - </tr> - <tr> - <td><code>resizeWidth</code>, <code>resizeHeight</code>, and <code>resizeQuality</code></td> - <td>{{CompatChrome(54)}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - <td> </td> - </tr> - <tr> - <td><code>SVGImageElement</code> as source image</td> - <td>{{CompatChrome(59)}}</td> - <td>{{CompatChrome(59)}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - </tr> - </tbody> -</table> -</div> - -<p>[1] <code>createImageBitmap()</code> now defined on {{domxref("WindowOrWorkerGlobalScope")}} mixin.</p> - -<h2 id="See_also">See also</h2> - -<ul> - <li>{{domxref("CanvasRenderingContext2D.drawImage()")}}</li> - <li>{{domxref("ImageData")}}</li> -</ul> - -<p> - <audio class="hidden"> </audio> -</p> |