一个超弱的问题！--显示一个256色位图。

Question

看看这一页，好好找找：
http://www.csdn.net/dev/Visual%20C++/source%20code/Bitmap/index.htm

Answer 1

www.vckbase.com的vc知识库中有解决方案和例子程序

Answer 2

//在pDC 中显示任意颜色的位图
BOOL  BmpRead(CDC *pDC,char *FileName,int x,int y)
{
    int width,height;
    BITMAPINFOHEADER   bi;
    int          dwOffset; 
    int                i;
CFile OpenFile;
    LOGPALETTE *lp;
    BYTE PaletteBuffer[1024];
    CPalette cp,*OldCp;
BYTE *pBuf;
BITMAPINFO  *bf;
if(OpenFile.Open (FileName,CFile::modeRead)==NULL)return FALSE;
OpenFile.Seek(14,CFile::begin);
    OpenFile.Read(&bi,40);        
    width=bi.biWidth;
    height=bi,biHeight;
if(bi.biSizeImage==0)bi.biSizeImage=(long)bi.biWidth*bi.biHeight*bi.biBitCount/8;
  
    if(bi.biBitCount<=8)
{
lp =(LOGPALETTE *)new BYTE[sizeof(LOGPALETTE) +(int)bi.biClrUsed* sizeof(PALETTEENTRY)];
    lp->palVersion=0x300;
    lp->palNumEntries=(int)bi.biClrUsed;
    OpenFile.Read(PaletteBuffer,(int)bi.biClrUsed*4);
    OpenFile.Close();
    for (i = 0; i < (int)bi.biClrUsed; i++){
            lp->palPalEntry[i].peRed   = PaletteBuffer[4*i+2];
            lp->palPalEntry[i].peGreen = PaletteBuffer[4*i+1];
            lp->palPalEntry[i].peBlue  = PaletteBuffer[4*i+0];
            lp->palPalEntry[i].peFlags = 0;
        }
 cp.CreatePalette(lp);
 OldCp=pDC->SelectPalette(&cp,FALSE);
 pDC->RealizePalette();
 }
 else
 OpenFile.Close();
     if(bi.biBitCount<=8)
     bf=(BITMAPINFO*)new BYTE[bi.biSize + bi.biClrUsed *4];
     else 
 bf=(BITMAPINFO*)new BYTE[bi.biSize];
 
OpenFile.Open (FileName, CFile::modeRead);
    OpenFile.Seek(14,CFile::begin);
    
if(bi.biBitCount<=8)
    OpenFile.Read(bf,(int)bi.biClrUsed *4+bi.biSize);
else
OpenFile.Read(bf,bi.biSize);
    OpenFile.Close(); pBuf=new BYTE[bi.biSizeImage];    OpenFile.Open(FileName,CFile::modeRead);
   
    if(bi.biBitCount<=8)
    dwOffset=54+bi.biClrUsed*4;
else
dwOffset=54;
    OpenFile.Seek(dwOffset,CFile::begin);
    OpenFile.Read(pBuf,bi.biSizeImage);
    OpenFile.Close(); x=x+(width-(int)bi.biWidth)/2;
y=y+(height-(int)bi.biHeight)/2;
      StretchDIBits(
       pDC->m_hDC,                // handle to device context
       0,              // x-coordinate of upper-left corner of dest. rectangle
       0,              // y-coordinate of upper-left corner of dest. rectangle
       width,         // width of destination rectangle
       height,        // height of destination rectangle
       0,               // x-coordinate of upper-left corner of source rectangle
       0,               // y-coordinate of upper-left corner of source rectangle
       bi.biWidth,          // width of source rectangle
       bi.biHeight,         // height of source rectangle
       pBuf,            // address of bitmap bits
       (BITMAPINFO *)bf,  // address of bitmap data
       DIB_RGB_COLORS,                   // usage flags
       SRCCOPY                    // raster operation code
      
       );
pDC->TextOut(0,0,ts);             
if(bi.biBitCount<=8)
{
 pDC->SelectPalette(OldCp,FALSE);
 cp.DeleteObject();
 delete lp;
 }
 delete pBuf;
 delete bf;
 return TRUE;
}

Answer 3

pDC->TextOut(0,0,ts);  该行毫无价值，应该删除
         

Answer 4

不然再加上在Microsoft.com的KnowLeage上有loadpic.exe