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<p align=center style='text-align:center;line-height:18.0pt'><b><span
lang=ZH-CN style='font-size:10.5pt'>图</span></b><b><span style='font-size:
10.5pt;font-family:"Times New Roman"'>5.1 </span></b><b><span
lang=ZH-CN style='font-size:10.5pt'>原图</span></b><span style='font-size:10.5pt;
font-family:"Times New Roman"'><o:p></o:p></span></p>
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<p align=center style='text-align:center;line-height:18.0pt'><b><span
lang=ZH-CN style='font-size:10.5pt'>图</span></b><b><span style='font-size:
10.5pt;font-family:"Times New Roman"'>5.2 </span></b><b><span
lang=ZH-CN style='font-size:10.5pt'>图</span></b><b><span style='font-size:
10.5pt;font-family:"Times New Roman"'>5.1</span></b><b><span lang=ZH-CN
style='font-size:10.5pt'>反色后的结果</span></b><span style='font-size:10.5pt;
font-family:"Times New Roman"'><o:p></o:p></span></p>
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<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span lang=ZH-CN style='font-size:10.5pt'>反色有时是很有用的，比如，图</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>5.1</span><span
lang=ZH-CN style='font-size:10.5pt'>中黑色区域占绝大多数，这样打印起来很费墨，我们可以先进行反色处理后再打印。</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'><o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span lang=ZH-CN style='font-size:10.5pt'>反色的实际含义是将</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>R</span><span
lang=ZH-CN style='font-size:10.5pt'>、</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>G</span><span lang=ZH-CN style='font-size:10.5pt'>、</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>B</span><span
lang=ZH-CN style='font-size:10.5pt'>值反转。若颜色的量化级别是</span><span style='font-size:
10.5pt;font-family:"Times New Roman"'>256</span><span lang=ZH-CN
style='font-size:10.5pt'>，则新图的</span><span style='font-size:10.5pt;font-family:
"Times New Roman"'>R</span><span lang=ZH-CN style='font-size:10.5pt'>、</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>G</span><span
lang=ZH-CN style='font-size:10.5pt'>、</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>B</span><span lang=ZH-CN style='font-size:10.5pt'>值为</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>255</span><span
lang=ZH-CN style='font-size:10.5pt'>减去原图的</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>R</span><span lang=ZH-CN style='font-size:10.5pt'>、</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>G</span><span
lang=ZH-CN style='font-size:10.5pt'>、</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>B</span><span lang=ZH-CN style='font-size:10.5pt'>值。这里针对的是所有图，包括真彩图、带调色板的彩色图</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>(</span><span
lang=ZH-CN style='font-size:10.5pt'>又称为伪彩色图</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>)</span><span lang=ZH-CN style='font-size:10.5pt'>、和灰度图。针对不同种类有不同的处理。</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'><o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span lang=ZH-CN style='font-size:10.5pt'>先看看真彩图。我们知道真彩图不带调色板，每个象素用</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>3</span><span
lang=ZH-CN style='font-size:10.5pt'>个字节，表示</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>R</span><span lang=ZH-CN style='font-size:10.5pt'>、</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>G</span><span
lang=ZH-CN style='font-size:10.5pt'>、</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>B</span><span lang=ZH-CN style='font-size:10.5pt'>三个分量。所以处理很简单，把反转后的</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>R</span><span
lang=ZH-CN style='font-size:10.5pt'>、</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>G</span><span lang=ZH-CN style='font-size:10.5pt'>、</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>B</span><span
lang=ZH-CN style='font-size:10.5pt'>值写入新图即可。</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'><o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span lang=ZH-CN style='font-size:10.5pt'>再来看看带调色板的彩色图，我们知道位图中的数据只是对应调色板中的一个索引值，我们只需要将调色板中的颜色反转，形成新调色板，而位图数据不用动，就能够实现反转。</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'><o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span lang=ZH-CN style='font-size:10.5pt'>灰度图是一种特殊的伪彩色图，只不过调色板中的</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>R</span><span
lang=ZH-CN style='font-size:10.5pt'>、</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>G</span><span lang=ZH-CN style='font-size:10.5pt'>、</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>B</span><span
lang=ZH-CN style='font-size:10.5pt'>值</span><span lang=ZH-CN style='font-size:
10.5pt;font-family:"Times New Roman"'> </span><span lang=ZH-CN
style='font-size:10.5pt'>都是一样的而已。所以反转的处理和上面讲的一样。</span><span style='font-size:
10.5pt;font-family:"Times New Roman"'><o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span lang=ZH-CN style='font-size:10.5pt'>这里，我想澄清一个概念。过去我们讲二值图时，一直都说成黑白图。二值位图一定是黑白的吗？答案是不一定。我们安装</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>Windows95</span><span
lang=ZH-CN style='font-size:10.5pt'>时看到的那幅</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>setup.bmp</span><span lang=ZH-CN
style='font-size:10.5pt'>是由蓝色和黑色组成的，但它实际上是二值图。原来，它的调色板中的两种颜色是黑与蓝，而不是黑与白。所以说二值图也可以是彩色的，只不过一般情况下是黑白图而已。</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'><o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span lang=ZH-CN style='font-size:10.5pt'>下面的程序实现了反色，注意其中真彩图和调色板位图处理时的差别。</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'><o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>BOOL Invert(HWND hWnd)<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>{<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'> DWORD
OffBits,BufSize;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>LPBITMAPINFOHEADER lpImgData;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
LPSTR
lpPtr;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
HLOCAL
hTempImgData;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
LPBITMAPINFOHEADER lpTempImgData;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
LPSTR
lpTempPtr;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
HDC
hDc;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
HFILE
hf;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
LONG
x,y;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'> LOGPALETTE
*pPal;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
HPALETTE
hPrevPalette=NULL; <o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
HLOCAL
hPal;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
DWORD
i;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'> unsigned
char
Red,Green,Blue;<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
OffBits=bf.bfOffBits-sizeof(BITMAPFILEHEADER);<o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
BufSize=OffBits+bi.biHeight*LineBytes; //</span><span lang=ZH-CN
style='font-size:10.5pt'>新开缓冲区的大小</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'><o:p></o:p></span></p>
<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span style='font-size:10.5pt;font-family:
"Times New Roman"'>
if((hTempImgData=LocalAlloc(LHND,BufSize))==NULL)<o:p></o:p></span></p>
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