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<DIV class=newsmallbox>Windows GDI和GDI+编程实例剖析 </DIV>
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<DIV class=newtitle1>作者： 宋宝华 </DIV>
<DIV class=newtitle2>出处： 天极网 </DIV>
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<DIV class=newtitle4>[ 2005-11-11 08:18 ]</DIV></DIV>
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<DIV class=guanggao><SPAN 
id=contentAdv></SPAN></DIV>　　<STRONG>丰富的图像格式支持</STRONG><BR><BR>　　GDI 
+提供了Image、Bitmap 和Metafile 
类，方便用户进行图像格式的加载、操作和保存。GDI+支持的图像格式有BMP、GIF、JPEG、EXIF、PNG、TIFF、ICON、WMF、EMF等，几乎涵盖了所有的常用图像格式。<BR><BR>
<TABLE borderColor=#cccccc width="90%" align=center bgColor=#e3e3e3 border=1>
  <TBODY>
  <TR>
    <TD>void CGdiexampleDlg::OnImage()<BR>{<BR>　// TODO: Add your command 
      handler code here<BR>　CClientDC dc(this);<BR>　//创建Graphics对象<BR>　Graphics 
      graphics(dc);<BR>　Image image(L 
      "d:\\1.jpg");<BR>　//在矩形区域内显示jpg图像<BR>　Point destPoints1[3] 
      =<BR>　{<BR>　　Point(10, 10), Point(220, 10), Point(10, 
      290)<BR>　};<BR>　graphics.DrawImage(&amp;image, destPoints1, 
      3);<BR>　//在平行四边形区域内显示jpg图像<BR>　Point destPoints2[3] 
      =<BR>　{<BR>　　Point(230, 10), Point(440, 10), Point(270, 
      290)<BR>　};<BR>　graphics.DrawImage(&amp;image, destPoints2, 
  3);<BR>}</TD></TR></TBODY></TABLE><BR>　　上述程序将D盘根目录下文件名为"1.jpg"的jpg图像以矩阵和平行四边形两种方式显示，效果如图7。<BR><BR>
<TABLE width="90%" align=center border=0>
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    <TD>
      <DIV align=center><IMG 
      src="Windows GDI和GDI+编程实例剖析_5.files/pk6h9wyzb271.jpg" border=0><BR>图7 
      GDI+多种图像格式支持</DIV></TD></TR></TBODY></TABLE><BR>　　由此我们可以看出，GDI+在图像显示和操作方面的确比GDI简单许多。回忆我们在《<A 
href="http://dev.yesky.com/72/2150572.shtml?412" target=_blank><FONT 
color=#0033ff>Visual 
C++中DDB与DIB位图编程全攻略</FONT></A>》一文中所介绍的用GDI显示位图的方式，其与GDI+图像处理的难易程度真是有天壤之别。<BR><BR>
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