怎么将内存中的BMP图像数据以图片的形式显示在Picture控件里

[lsxsxs]

我已经得到了一个BMP图片的数据，文件头也有。
BITMAPFILEHEADER m_BMPHeader1;
BITMAPINFOHEADER m_BMPInfoHeader1;
都已经给m_BMPHeader1和m_BMPInfoHeader1赋好值了。
unsigned char buf2[921600];//里面存放的是图形的RGB数据，是640*480的
我也弄了个unsigned char buf3[921654],来把m_BMPHeader1，m_BMPInfoHeader1和buf2给存进去了。
现在我该怎么把这个数据显示到Picture控件里呢，控件大小我也是固定的640*480的，所以不需要改变大小，直接显示上去就可以。
我在网上看了SetDIBits，但是我不知道怎么把各个参数赋进去。
SetDIBits(HDC hdc, HBITMAP hbmp, UINT uStartScan, UINT cScanLines, CONST VOID *lpvBits,CONST BITMAPINFO *lpbmi, UINT fuColorUse)；
其中第二个参数HBITMAP hbmp我该赋什么，还有CONST VOID *lpvBits 我该赋什么呢。CONST BITMAPINFO *lpbmi我该赋什么进去，是我上面定义的哪个参数。
希望哪位大哥说详细点啊，不胜感激。先谢过了。

[雪影]

HBITMAP CShowBMPDlg::BufferToHBITMAP()
...{
     HBITMAP                 hShowBMP;
     LPSTR                 hDIB,lpBuffer = m_pBMPBuffer;
     LPVOID                 lpDIBBits;
     BITMAPFILEHEADER     bmfHeader;
     DWORD                 bmfHeaderLen;
    
     bmfHeaderLen = sizeof(bmfHeader);
     strncpy((LPSTR)&bmfHeader,(LPSTR)lpBuffer,bmfHeaderLen);

    if (bmfHeader.bfType != (*(WORD*)"BM")) return NULL;
     hDIB = lpBuffer + bmfHeaderLen;
     BITMAPINFOHEADER &bmiHeader = *(LPBITMAPINFOHEADER)hDIB ;
     BITMAPINFO &bmInfo = *(LPBITMAPINFO)hDIB ;
     m_bmW = bmiHeader.biWidth;
     m_bmH = bmiHeader.biHeight;
     lpDIBBits=(lpBuffer)+((BITMAPFILEHEADER *)lpBuffer)->bfOffBits;
     CClientDC dc(this);
     hShowBMP = CreateDIBitmap(dc.m_hDC,&bmiHeader,CBM_INIT,lpDIBBits,&bmInfo,DIB_RGB_COLORS);
    return hShowBMP;
}

void CShowBMPDlg::DrawImage(int x, int y, CDC *pDC)
...{
     HBITMAP OldBitmap;
     CDC MemDC;
     MemDC.CreateCompatibleDC(pDC);
     OldBitmap=(HBITMAP)MemDC.SelectObject(m_hBitmap);

     CBitmap* pBitmap = CBitmap::FromHandle(m_hBitmap);
    if(m_bmW == 0 || m_bmH == 0)
        return ;
     CRect rect;
     GetClientRect(&rect);    
    /**//*str.Format("%d %d", rect.Width(),rect.Height());
     MessageBox(str);*/
      pDC->BitBlt(x,y,rect.Width(),rect.Height(),&MemDC,0,0,SRCCOPY);
    
     GetRGB(MemDC);

     MemDC.SelectObject(OldBitmap);
}

[雪影]

参考
http://hi.baidu.com/jiaju111/blog/item/3ee83638c89ad4c7d46225f2.html
http://hi.baidu.com/sansummer/blog/item/d5415e16a249831d972b43fe.html/cmtid/a618360e262943ed36d12293

[lsxsxs]

打开文件显示出来我会弄，这个数据是传回来的数据，不是从某个图片上读取出来的数据。最主要的是那个BITMAPINFO我该怎么弄，24位的又没有调色板，我把BITMAPINFOHEADER赋进去，就报错说不能从BITMAPINFOHEADER*转化为BITMAPINFO*

[iamshuke]

SetDIBits用法:
http://blog.csdn.net/iamshuke/archive/2010/07/20/5749933.aspx

[dvlinker]

帮忙顶一个～学习了

[踏实每一步]

BITMAPINFOHEADER bhead;
BITMAPINFO bi;
bi.bmiHeader = bhead;
bi.bmiColors[1].rgbBlue = 100;
bi.bmiColors[1].rgbGreen = 100;
bi.bmiColors[1].rgbRed = 100;
bi.bmiColors[1].rgbReserved = 0;

[aamaomao]

这个函数就ok了
int StretchDIBits(
HDC hdc, // handle to DC
int XDest, // x-coord of destination upper-left corner
int YDest, // y-coord of destination upper-left corner
int nDestWidth, // width of destination rectangle
int nDestHeight, // height of destination rectangle
int XSrc, // x-coord of source upper-left corner
int YSrc, // y-coord of source upper-left corner
int nSrcWidth, // width of source rectangle
int nSrcHeight, // height of source rectangle
CONST VOID *lpBits, // bitmap bits
CONST BITMAPINFO *lpBitsInfo, // bitmap data
UINT iUsage, // usage options
DWORD dwRop // raster operation code
);

[hastings]

#define SHOW_NORMAL			1
#define SHOW_CENTER			2
#define SHOW_STRETCH		3
#define SHOW_ISOSTRETCH		4
int  ShowDib (HDC hdc, BITMAPFILEHEADER * pbmfh, int cxClient, int cyClient, int wShow)
{
	if(NULL==pbmfh)
		return 0;
	return ShowDib(hdc,(BITMAPINFO*)(pbmfh+1),(BYTE*)pbmfh+(pbmfh->bfOffBits),cxClient,cyClient,wShow);
}
int ShowDib (HDC hdc, BITMAPINFO * pbmi, BYTE * pBits, int cxClient, int cyClient, int wShow)
{
	if(NULL==hdc || NULL==pbmi || NULL==pBits || wShow<SHOW_NORMAL || wShow>SHOW_ISOSTRETCH)
		return 0;
	int cxDib, cyDib ;
	int BltMode, ret ;
	if (pbmi->bmiHeader.biSize == sizeof (BITMAPCOREHEADER))
	{
		cxDib = ((BITMAPCOREHEADER *) pbmi)->bcWidth ;
		cyDib = ((BITMAPCOREHEADER *) pbmi)->bcHeight ;
	}
	else
	{
		cxDib =      pbmi->bmiHeader.biWidth ;
		cyDib = abs (pbmi->bmiHeader.biHeight) ;
	}
	switch (wShow)
	{
	case SHOW_NORMAL:
		return SetDIBitsToDevice (hdc, 0, 0, cxDib, cyDib, 0, 0, 
			0, cyDib, pBits, pbmi, DIB_RGB_COLORS) ;
		
	case SHOW_CENTER:
		return SetDIBitsToDevice (hdc, (cxClient - cxDib) / 2,(cyClient - cyDib) / 2, 
			cxDib, cyDib, 0, 0, 0, cyDib, pBits, pbmi, DIB_RGB_COLORS) ;
		
	case SHOW_STRETCH:
		BltMode=SetStretchBltMode (hdc, COLORONCOLOR) ;
		ret=StretchDIBits (hdc, 0, 0, cxClient, cyClient, 
			0, 0, cxDib, cyDib,
			pBits, pbmi, DIB_RGB_COLORS, SRCCOPY) ;
		SetStretchBltMode (hdc, BltMode) ;
		return ret;
		
	case SHOW_ISOSTRETCH:
		BltMode=SetStretchBltMode (hdc, COLORONCOLOR) ;
		if(cxDib*cyClient > cyDib*cxClient)//图更宽
			ret=StretchDIBits (hdc,0,
				(cyClient-(int)((float)cyDib/(float)cxDib*(float)cxClient))/2,
				cxClient, (int)((float)cyDib/(float)cxDib*(float)cxClient) , 
				0, 0, cxDib, cyDib, pBits, pbmi, DIB_RGB_COLORS, SRCCOPY) ;
		else
			ret=StretchDIBits (hdc,
				(cxClient-(int)((float)cxDib/(float)cyDib*(float)cyClient))/2, 0,
				(int)((float)cxDib/(float)cyDib*(float)cyClient), cyClient,
				0, 0, cxDib, cyDib, pBits, pbmi, DIB_RGB_COLORS, SRCCOPY) ;
		SetStretchBltMode (hdc, BltMode) ;
		return ret;
	}
	return 0 ;
}
ShowDib (hdc, (BITMAPFILEHEADER * )buf3, 640, 480, SHOW_NORMAL);

[lsxsxs]

谢谢了

[ptoly]

这个ShowDib (hdc, (BITMAPFILEHEADER * )buf3, 640, 480, SHOW_NORMAL);中的hdc怎么在内存中获取啊？