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    <title>图像大小</title>
    <meta name="keywords" content="图像,大小,宽高,图像属性" />
    <meta name="description" content="图像_图像大小_图像,大小,宽高,图像属性" />
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          博客网
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bottom: 0;" style="margin-top: 120px;">
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        <div class="bg-white mr15 demo-sidebar" style=" border-radius: 4px; margin-right:15px; width: 200px;">
            <div class="art-sidebar code-sidebar sidebar_fixed">
    <div class="p10 bold"><i class="iconfont icon-dot"></i> HTML5画布</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="html5.html" class="block">
          画布元素
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 线</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="line.html" class="block">
          线
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="lineWidth.html" class="block">
          线条宽度
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="lineColor.html" class="block">
          线条颜色
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="lineCap.html" class="block">
          线帽
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 曲线</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="arc.html" class="block">
          å¼§
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="quadraticCurve.html" class="block">
          二次曲线
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="bezierCurve.html" class="block">
          贝塞尔曲线
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 路径</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="Path.html" class="block">
          路径
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="lineJoin.html" class="block">
          线条连接
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="roundedCorners.html" class="block">
          圆角
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 形状</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="customShape.html" class="block">
          自定义形状
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="Rectangle.html" class="block">
          长方形
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="Circle.html" class="block">
          圆圈
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="Semicircle.html" class="block">
          半圆
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="oval.html" class="block">
          椭圆形
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 填充样式</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="colorFill.html" class="block">
          颜色填充
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="linearGradient.html" class="block">
          线性渐变
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="radialGradient.html" class="block">
          径向渐变
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="Pattern.html" class="block">
          图案
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 图像</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="drawImage.html" class="block">
          绘制图像
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="imageSize" class="block">
          图像大小
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="imageCrop.html" class="block">
          图像裁剪
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="imageLoader.html" class="block">
          图像加载器
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 文本</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="text.html" class="block">
          字体、大小和样式
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="textColor.html" class="block">
          文本颜色
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="textStroke.html" class="block">
          文本笔划
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="textAlign.html" class="block">
          文本对齐
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="textBaseline.html" class="block">
          文本基线
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="textMetrics.html" class="block">
          文本度量
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="textWrap.html" class="block">
          文本换行符
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 转换</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="translate.html" class="block">
          转换
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="scale.html" class="block">
          比例
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="rotate.html" class="block">
          旋转
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="customTransform.html" class="block">
          自定义变换
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="Shear.html" class="block">
          剪切
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="mirror.html" class="block">
          镜子
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="resetTransform.html" class="block">
          重置变换
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="stateStack.html" class="block">
          状态堆栈
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 复合材料</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="shadows.html" class="block">
          阴影
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="globalAlpha.html" class="block">
          全局Alpha
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="clippingRegion.html" class="block">
          剪裁区域
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="operations.html" class="block">
          操作
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 图像数据和URL</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="imageData.html" class="block">
          图像数据
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="invertColors.html" class="block">
          反色
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="grayscale.html" class="block">
          灰度
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="getDataURL.html" class="block">
          获取数据URL
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="loadDataURL.html" class="block">
          加载数据URL
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="saveDrawing.html" class="block">
          保存绘图
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 动画</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="clearCanvas.html" class="block">
          清除画布
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="animationFrames.html" class="block">
          动画帧
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="linearMotion.html" class="block">
          线性运动
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="acceleration.html" class="block">
          加快
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="oscillation.html" class="block">
          振荡
        </a>
      </li>
            <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="startAndStop.html" class="block">
          启动和停止
        </a>
      </li>
          </ul>
      <div class="p10 bold"><i class="iconfont icon-dot"></i> 鼠标检测</div>
  <ul class="aside-wrap plr10">
          <li class="relative pl10 align_left font14" style="line-height: 32px;">
        <a href="mouseCoordinates.html" class="block">
          鼠标坐标
        </a>
      </li>
          </ul>
    </div>        </div>
        <div class="module-wrap m0" style="flex: 1">
          <div class="module-head bd-0">
            <h3 class="cl-666">图像大小</h3>
          </div>
            <div class="module-content plr15">
              <!--内容-->
        <div class="demo-content p0 absolute">
          <div class="left">
            <!-- Nav tabs -->
            <div class="p15" role="tablist">
              <span
                role="presentation"
                class="active cl-999"
                style="padding: 10px"
                >代码</span
              >
              <span
                >                <a id="run">运行</a> </span
              >
            </div>
            <div class="tab-content">
              <div
                role="tabpanel"
                class="tab-pane active"
                id="home"
                style="padding: 1px"
              >
                <textarea
                  id="htmlcode"
                  placeholder="把代码粘贴到此处,点击运行进行调试,你也可以点击调试类型选择你要调试的内容,相关文件类库你可以引用网络上类库。"
                  style="color: #999"
                  class="p15"
                >
<!DOCTYPE HTML>
<html>
  <head>
    <title>图像大小</title>
    <style>
      body {
        margin: 0px;
        padding: 0px;
      }
    </style>
  </head>
  <body>
    <canvas id="myCanvas" width="578" height="200"></canvas>
    <script>
      var canvas = document.getElementById('myCanvas');
      var context = canvas.getContext('2d');
      var x = 188;
      var y = 30;
      var width = 200;
      var height = 137;
      var imageObj = new Image();

      imageObj.onload = function() {
        context.drawImage(imageObj, x, y, width, height);
      };
      imageObj.src = 'http://www.html5canvastutorials.com/demos/assets/darth-vader.jpg';
    </script>
  </body>
</html></textarea
                >
              </div>
            </div>
          </div>
          <div class="right">
            <iframe
              id="preview"
              name="preview"
              src="http://www.yunxi10.com/html/demo/demo.html"
              style="border: 0px; width: 100%; height: 100%"
            ></iframe>
          </div>
        </div>
      </div>
            </div>
        </div>
    </div>
</div>
</body>
</html>