求救，怎么把ddb位图转化为dib位图，而且保证清晰度！

Question

rt

Answer 1

Converting DDB to DIB
http://www.codeguru.com/bitmap/ddb_to_dib.shtml

Answer 2

// hBmp是你的DDB句柄
BITMAP bm;
::GetObject(hBmp, sizeof(BITMAP), &bm);
int nBitCount = 16; // 1, 4, 8, 24, 32 // 保存为几位的图形.
int nPalCol = 1<<nBitCount;// 1.data buffer
DWORD dwD = (bm.bmWidth*nBitCount + 31)/32 * 4 * bm.bmHeight;//bm.bmBitsPixel
BYTE * pData = new BYTE[dwD];// 2.info head buffer.
DWORD dw;
if(nBitCount<=8)
 dw = sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*nPalCol;
else
 dw = sizeof(BITMAPINFOHEADER);

PBITMAPINFO pBmpHead = (PBITMAPINFO)new BYTE[dw];
pBmpHead->bmiHeader.biSize =sizeof(BITMAPINFOHEADER);
pBmpHead->bmiHeader.biWidth =bm.bmWidth;
pBmpHead->bmiHeader.biHeight =bm.bmHeight;
pBmpHead->bmiHeader.biPlanes =1;
pBmpHead->bmiHeader.biBitCount =nBitCount;
pBmpHead->bmiHeader.biCompression =BI_RGB;
pBmpHead->bmiHeader.biSizeImage =0;
pBmpHead->bmiHeader.biXPelsPerMeter =0;
pBmpHead->bmiHeader.biYPelsPerMeter =0;
pBmpHead->bmiHeader.biClrUsed =0;
pBmpHead->bmiHeader.biClrImportant =0;

if(nBitCount<=8)
::GetSystemPaletteEntries(hDC, 0, nPalCol, (LPPALETTEENTRY)pBmpHead->bmiColors);

// 把图形转化为指定格式的DIB格式
GetDIBits(hDC, hBmp, 0, bm.bmHeight, pData, pBmpHead, DIB_RGB_COLORS);