（四）Canvas API方法和属性汇总

怼烎@ 2022-08-01 18:01 59阅读 0赞

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         <td style="word-wrap:break-word; margin:0px; padding:0px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px"> <p style="word-wrap:break-word; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; line-height:24px; text-indent:2em"> <span style="word-wrap:break-word"><span style="word-wrap:break-word; font-size:13px"><span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700"><span style="color:#196e3; word-wrap:break-word"><a href="http://www.webclks.com/archives/tag/canvas" style="word-wrap:break-word; margin:0px; padding:0px; color:rgb(51,102,153)" rel="nofollow">canvas</a></span>主要属性和方法</span></span></span></p> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 保存当前环境的状态</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> restore()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 返回之前保存过的路径状态和属性</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> createEvent()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> &nbsp;</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> getContext()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 返回一个对象，指出访问绘图功能必要的<span style="word-wrap:break-word; background-color:transparent"><span style="color:#196e3; word-wrap:break-word"><a href="http://www.webclks.com/archives/tag/api" style="word-wrap:break-word; margin:0px; padding:0px; color:rgb(51,102,153)" rel="nofollow">API</a></span></span></td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> toDataURL()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 返回<span style="word-wrap:break-word; background-color:transparent"><span style="color:#196e3; word-wrap:break-word"><a href="http://www.webclks.com/archives/tag/canvas" style="word-wrap:break-word; margin:0px; padding:0px; color:rgb(51,102,153)" rel="nofollow">canvas</a></span></span>图像的URL</td> 
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          </table> <br style="word-wrap:break-word"> <p style="word-wrap:break-word; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; line-height:24px; text-indent:2em"> <span style="word-wrap:break-word"><span style="word-wrap:break-word; font-size:13px"><span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700"><span style="word-wrap:break-word; margin:0px; padding:0px"><span style="color:#196e3; word-wrap:break-word"><a href="http://www.webclks.com/archives/tag/canvas" style="word-wrap:break-word; margin:0px; padding:0px; color:rgb(51,102,153)" rel="nofollow">canvas</a></span></span>的<span style="color:#196e3; word-wrap:break-word"><a href="http://www.webclks.com/archives/tag/api" style="word-wrap:break-word; margin:0px; padding:0px; color:rgb(51,102,153)" rel="nofollow">API</a></span>-颜色、样式和阴影属性和方法</span></span></span></p> 
          <table style="word-wrap:break-word; margin:0px; padding:0px; empty-cells:show; border-collapse:collapse; border:1px solid rgb(227,237,245); table-layout:auto; width:879px; overflow:hidden"> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">属性</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回用于填充绘画的颜色、渐变或模式</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> strokeStyle</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回用于笔触的颜色、渐变或模式</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> shadowColor</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回用于阴影的颜色</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> shadowBlur</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回用于阴影的模糊级别</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> shadowOffsetX</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回阴影距形状的水平距离</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> shadowOffsetY</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回阴影距形状的垂直距离</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">方法</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> createLinearGradient()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 创建线性渐变（用在画布内容上）</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> createPattern()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 在指定的方向上重复指定的元素</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> createRadialGradient()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 创建放射状/环形的渐变（用在画布内容上）</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> addColorStop()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 规定渐变对象中的颜色和停止位置</td> 
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          </table> <br style="word-wrap:break-word"> <p style="word-wrap:break-word; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; line-height:24px; text-indent:2em"> <span style="word-wrap:break-word"><span style="word-wrap:break-word; font-size:13px"><span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">Canvas的<span style="color:#196e3; word-wrap:break-word"><a href="http://www.webclks.com/archives/tag/api" style="word-wrap:break-word; margin:0px; padding:0px; color:rgb(51,102,153)" rel="nofollow">API</a></span>-线条样式属性和方法</span></span></span></p> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">属性</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> lineCap</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回线条的结束端点样式</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> lineJoin</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回两条线相交时，所创建的拐角类型</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> lineWidth</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回当前的线条宽度</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> miterLimit</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回最大斜接长度</td> 
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          </table> <br style="word-wrap:break-word"> <p style="word-wrap:break-word; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; line-height:24px; text-indent:2em"> <span style="word-wrap:break-word"><span style="word-wrap:break-word; font-size:13px"><span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">Canvas的API-矩形方法</span></span></span></p> 
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            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">方法</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> rect()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 创建矩形</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> fillRect()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 绘制"被填充"的矩形</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> strokeRect()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 绘制矩形（无填充）</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> clearRect()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 在给定的矩形内清除指定的像素</td> 
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          </table> <br style="word-wrap:break-word"> <p style="word-wrap:break-word; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; line-height:24px; text-indent:2em"> <span style="word-wrap:break-word"><span style="word-wrap:break-word; font-size:13px"><span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">Canvas的API-路径方法</span></span></span></p> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">方法</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> fill()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 填充当前绘图（路径）</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> stroke()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 绘制已定义的路径</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> beginPath()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 起始一条路径，或重置当前路径</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> moveTo()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 把路径移动到画布中的指定点，不创建线条</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> closePath()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 创建从当前点回到起始点的路径</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> lineTo()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 添加一个新点，创建从该点到最后指定点的线条</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> clip()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 从原始画布剪切任意形状和尺寸的区域</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> quadraticCurveTo()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 创建二次贝塞尔曲线</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> bezierCurveTo()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 创建三次方贝塞尔曲线</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> arc()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 创建弧/曲线（用于创建圆形或部分圆）</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> arcTo()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 创建两切线之间的弧/曲线</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> isPointInPath()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 如果指定的点位于当前路径中，返回布尔值</td> 
            </tr> 
           </tbody> 
          </table> <br style="word-wrap:break-word"> <p style="word-wrap:break-word; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; line-height:24px; text-indent:2em"> <span style="word-wrap:break-word"><span style="word-wrap:break-word; font-size:13px"><span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">Canvas的API-转换方法</span></span></span></p> 
          <table style="word-wrap:break-word; margin:0px; padding:0px; empty-cells:show; border-collapse:collapse; border:1px solid rgb(227,237,245); table-layout:auto; width:879px; overflow:hidden"> 
           <tbody style="word-wrap:break-word"> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">方法</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> scale()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 缩放当前绘图至更大或更小</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> rotate()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 旋转当前绘图</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> translate()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 重新映射画布上的 (0,0) 位置</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> transform()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 替换绘图的当前转换矩阵</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> setTransform()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 将当前转换重置为单位矩阵。然后运行 transform()</td> 
            </tr> 
           </tbody> 
          </table> <br style="word-wrap:break-word"> <p style="word-wrap:break-word; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; line-height:24px; text-indent:2em"> <span style="word-wrap:break-word"><span style="word-wrap:break-word; font-size:13px"><span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">Canvas的API-文本属性和方法</span></span></span></p> 
          <table style="word-wrap:break-word; margin:0px; padding:0px; empty-cells:show; border-collapse:collapse; border:1px solid rgb(227,237,245); table-layout:auto; width:879px; overflow:hidden"> 
           <tbody style="word-wrap:break-word"> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">属性</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> font</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回文本内容的当前字体属性</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> textAlign</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回文本内容的当前对齐方式</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> textBaseline</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回在绘制文本时使用的当前文本基线</td> 
            </tr> 
           </tbody> 
          </table> <br style="word-wrap:break-word"> 
          <table style="word-wrap:break-word; margin:0px; padding:0px; empty-cells:show; border-collapse:collapse; border:1px solid rgb(227,237,245); table-layout:auto; width:879px; overflow:hidden"> 
           <tbody style="word-wrap:break-word"> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 方法</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 描述</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> fillText()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 在画布上绘制"被填充的"文本</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> strokeText()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 在画布上绘制文本（无填充）</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> measureText()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 返回包含指定文本宽度的对象</td> 
            </tr> 
           </tbody> 
          </table> <br style="word-wrap:break-word"> <p style="word-wrap:break-word; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; line-height:24px; text-indent:2em"> <span style="word-wrap:break-word"><span style="word-wrap:break-word; font-size:13px"><span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">Canvas的API-图像绘制方法</span></span></span></p> 
          <table style="word-wrap:break-word; margin:0px; padding:0px; empty-cells:show; border-collapse:collapse; border:1px solid rgb(227,237,245); table-layout:auto; width:879px; overflow:hidden"> 
           <tbody style="word-wrap:break-word"> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">方法</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> drawImage()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 向画布上绘制图像、画布或视频&nbsp;&nbsp;chrome不支持</td> 
            </tr> 
           </tbody> 
          </table> <br style="word-wrap:break-word"> <p style="word-wrap:break-word; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; line-height:24px; text-indent:2em"> <span style="word-wrap:break-word"><span style="word-wrap:break-word; font-size:13px"><span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">Canvas的API-像素操作方法和属性</span></span></span></p> 
          <table style="word-wrap:break-word; margin:0px; padding:0px; empty-cells:show; border-collapse:collapse; border:1px solid rgb(227,237,245); table-layout:auto; width:879px; overflow:hidden"> 
           <tbody style="word-wrap:break-word"> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">属性</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> width</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 返回 ImageData 对象的宽度</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> height</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 返回 ImageData 对象的高度</td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> data</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 返回一个对象，其包含指定的 ImageData 对象的图像数据</td> 
            </tr> 
           </tbody> 
          </table> <br style="word-wrap:break-word"> 
          <table style="word-wrap:break-word; margin:0px; padding:0px; empty-cells:show; border-collapse:collapse; border:1px solid rgb(227,237,245); table-layout:auto; width:879px; overflow:hidden"> 
           <tbody style="word-wrap:break-word"> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">方法</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
            </tr> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> createImageData()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 创建新的、空白的 ImageData 对象</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> getImageData()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 返回 ImageData 对象，该对象为画布上指定的矩形复制像素数据</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> putImageData()</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 把图像数据（从指定的 ImageData 对象）放回画布上</td> 
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          </table> <br style="word-wrap:break-word"> <p style="word-wrap:break-word; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; line-height:24px; text-indent:2em"> <span style="word-wrap:break-word"><span style="word-wrap:break-word; font-size:13px"><span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">Canvas的API-图像合成属性</span></span></span></p> 
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           <tbody style="word-wrap:break-word"> 
            <tr style="word-wrap:break-word; margin:0px; padding:0px"> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">属性</span></td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> <span style="word-wrap:break-word; margin:0px; padding:0px; font-weight:700">描述</span></td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> globalAlpha</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回绘图的当前 alpha 或透明值</td> 
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             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> globalCompositeOperation</td> 
             <td style="word-wrap:break-word; margin:0px; padding:4px; font-family:verdana,'Microsoft YaHei',Tahoma,sans-serif; font-size:14px; border:1px solid rgb(227,237,245); overflow:hidden"> 设置或返回新图像如何绘制到已有的图像上</td> 
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          </table> <span style="color:#000000; word-wrap:break-word">转载请注明:&nbsp;</span><span style="color:#196e3; word-wrap:break-word"><a href="http://www.webclks.com/archives/778" style="word-wrap:break-word; margin:0px; padding:0px; color:rgb(51,102,153)" rel="nofollow">Canvas API方法和属性汇总 | WEB前端开发</a></span></td> 
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