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<title>例18-3</title>
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<font SIZE="3">
<p ALIGN="JUSTIFY"><span lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:
10.0pt;font-family:"Times New Roman";mso-fareast-font-family:宋体;mso-font-kerning:
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<img src="exampl7.jpg" v:shapes="_x0000_i1025" width="336" height="235"></span></p>
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<p ALIGN="JUSTIFY"><font face="黑体" size="2"><font LANG="ZH-CN">
图</font>18-5 <font LANG="ZH-CN">输出图像</font></font></p>
<p ALIGN="JUSTIFY"><font size="2"><font LANG="ZH-CN">首先将一个图像选入资源，方法如图</font>18-6<font LANG="ZH-CN">所示，右键单击“</font>IDB_BITMAP1<font LANG="ZH-CN">”，选择“</font>Properties<font LANG="ZH-CN">”，出现如图</font>18-6<font LANG="ZH-CN">的对话框，然后在“</font>File
Name<font LANG="ZH-CN">”处填写图像文件的文件名。</font></font></p>
<font SIZE="3">
<p ALIGN="JUSTIFY"><span lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:
10.0pt;font-family:"Times New Roman";mso-fareast-font-family:宋体;mso-font-kerning:
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<img src="exampl8.jpg" v:shapes="_x0000_i1025" width="504" height="208"></span></p>
</font>
<p ALIGN="JUSTIFY"><font face="黑体" size="2"><font LANG="ZH-CN">
图</font>18-6 <font LANG="ZH-CN">将图像文件选入资源</font></font></p>
<p ALIGN="JUSTIFY"><font size="2">OnDraw<font LANG="ZH-CN">函数的代码如下：</font></font></p>
<blockquote>
<blockquote>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">void
CTestBitmapView::OnDraw(CDC* pDC)</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
<blockquote>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">CTestBitmapDoc*
pDoc = GetDocument( );</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">ASSERT_VALID(pDoc);</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"> </p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">//
TODO: add draw code for native data here</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">//
<font LANG="ZH-CN">从资源中装入位图</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
<blockquote>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">//<font LANG="ZH-CN">第一步：声明一个</font>CBitmap<font LANG="ZH-CN">对象，并从资源中装入位图</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">CBitmap
bitmap;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"> </p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">HBITMAP
hbitmap = (HBITMAP)LoadImage( // <font LANG="ZH-CN">此函数可以从文件中装载一幅位图</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">NULL,
// <font LANG="ZH-CN">如果从资源装载，则指明包含位图资源的程序实例句柄</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">"fighter.bmp",
// <font LANG="ZH-CN">位图文件的名字或者位图资源的</font>ID</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">IMAGE_BITMAP,
// <font LANG="ZH-CN">装载的图像类型为位图</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">0,0,
// <font LANG="ZH-CN">宽度和高度，</font>0<font LANG="ZH-CN">表示使用缺省值</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">LR_LOADFROMFILE);
// <font LANG="ZH-CN">装载标志，表明从文件装载</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">bitmap.Attach(hbitmap);</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"> </p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">//<font LANG="ZH-CN">第二步：创建一个兼容</font>DC</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">CDC
dcComp;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">dcComp.CreateCompatibleDC(pDC);</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"> </p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">//<font LANG="ZH-CN">第三步：将位图选入兼容</font>DC<font LANG="ZH-CN">中</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">dcComp.SelectObject(&bitmap);</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">BITMAP
bmInfo;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">bitmap.GetObject(sizeof(bmInfo),&bmInfo);</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"> </p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">//<font LANG="ZH-CN">第四步：使用函数</font>StretchBlt<font LANG="ZH-CN">显示位图</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">CRect
rect;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">GetClientRect(rect);
// <font LANG="ZH-CN">获取视图窗口客户区大小</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">pDC->StretchBlt(0,0,
// <font LANG="ZH-CN">显示位置</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">rect.Width(
), rect.Height( ), // <font LANG="ZH-CN">显示的宽度和高度</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">&dcComp,
// <font LANG="ZH-CN">位图所在的兼容</font>DC</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">0,0,
// <font LANG="ZH-CN">兼容</font>DC<font LANG="ZH-CN">中的位置</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">bmInfo.bmWidth,
bmInfo.bmHeight, // <font LANG="ZH-CN">位图的宽度和高度</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">SRCCOPY);
// <font LANG="ZH-CN">显示方式</font></font></p>
</blockquote>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
</blockquote>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
</blockquote>
</blockquote>
<p style="line-height: 100%; text-indent: 0; margin: 0" class="右标题" align="left"> </p>
</body>
</html>
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