怎样将硬盘上任何一个BMP文件显示在对话框界面上?????我这样做:
CBitmap cBit;
cBit.LoadBitmap(IDB_BITMAP1); // 这里是IDB_BITMAP1(固定死了),
我想调用硬盘上任何一个BMP文件,怎么做呢?就是,比如将“C:\\1.bmp”或则“F:\\xx.bmp”显示出来。(任何一个文件)怎么做?
CBitmap cBit;
cBit.LoadBitmap(IDB_BITMAP1); // 这里是IDB_BITMAP1(固定死了),
我想调用硬盘上任何一个BMP文件,怎么做呢?就是,比如将“C:\\1.bmp”或则“F:\\xx.bmp”显示出来。(任何一个文件)怎么做?
void CCreateRandomBMPDlg::OnBtnTest()
{
// TODO: Add your control notification handler code here
HBITMAP hBmp; CFileDialog dlg(TRUE, "bmp", NULL, 0, "位图文件 (*.bmp)|*.bmp||", this); if (dlg.DoModal() != IDOK)
{
return;
} hBmp = (HBITMAP) LoadImage(NULL, dlg.GetPathName(), IMAGE_BITMAP, 0, 0,
LR_LOADFROMFILE | LR_CREATEDIBSECTION); if (hBmp == NULL)
{
return;
} BITMAP bm;
PBITMAPINFO bmpInf; if (GetObject(hBmp, sizeof(bm), &bm) == 0)
return ; int nPaletteSize = 0; if (bm.bmBitsPixel < 16)
nPaletteSize = (int) pow(2, bm.bmBitsPixel); bmpInf = (PBITMAPINFO) LocalAlloc(LPTR,
sizeof(BITMAPINFOHEADER) +
sizeof(RGBQUAD) * nPaletteSize); //-----------------------------------------------
bmpInf->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmpInf->bmiHeader.biWidth = bm.bmWidth;
bmpInf->bmiHeader.biHeight = bm.bmHeight;
bmpInf->bmiHeader.biPlanes = bm.bmPlanes;
bmpInf->bmiHeader.biBitCount = bm.bmBitsPixel;
bmpInf->bmiHeader.biCompression = BI_RGB;
bmpInf->bmiHeader.biSizeImage = (bm.bmWidth + 7) /
8 * bm.bmHeight * bm.bmBitsPixel;
bmpInf->bmiHeader.biXPelsPerMeter = 0;
bmpInf->bmiHeader.biYPelsPerMeter = 0;
bmpInf->bmiHeader.biClrUsed = 0;
bmpInf->bmiHeader.biClrImportant = 0;
//----------------------------------------------- HDC hDC = ::GetWindowDC(NULL);
if (!::GetDIBits(hDC, hBmp, 0, (WORD) bm.bmHeight, NULL, bmpInf,
DIB_RGB_COLORS))
{
LocalFree(bmpInf);
::ReleaseDC(NULL, hDC);
return ;
} void* buf = (void*) new char[bmpInf->bmiHeader.biSizeImage];
if (buf == NULL)
{
::ReleaseDC(NULL, hDC);
LocalFree(bmpInf);
return ;
} if (!::GetDIBits(hDC, hBmp, 0, (UINT) bm.bmHeight, buf, bmpInf,
DIB_RGB_COLORS))
{
::ReleaseDC(NULL, hDC);
delete[]buf;
LocalFree(bmpInf);
return ;
} ::ReleaseDC(NULL, hDC); CString sMsg;
sMsg.Format("BitsPixel:%d,width:%d,height:%d", bm.bmBitsPixel, bm.bmWidth,
bm.bmHeight); AfxMessageBox(sMsg); CClientDC dc(this); if (bm.bmBitsPixel == 8)
{
BYTE* pData = (BYTE*) buf; int nWidth = bm.bmWidth;
while (nWidth % 4 != 0)
{
//Bmp每行数据都是4个字节的整数倍。
nWidth++;
} for (int i = 0; i < bm.bmHeight; i++)
{
for (int j = 0; j < bm.bmWidth; j++)
{
RGBQUAD rgbQ;
rgbQ = bmpInf->bmiColors[pData[i * nWidth + j]];
dc.SetPixel(j, bm.bmHeight - i,
RGB(rgbQ.rgbRed, rgbQ.rgbGreen, rgbQ.rgbBlue));
}
}
}
else if (bm.bmBitsPixel == 16)
{
BYTE* pData = (BYTE*) buf; int nWidth = bm.bmWidth*2;
while (nWidth % 4 != 0)
{
nWidth++;
} BYTE red, green, blue; for (int i = 0; i < bm.bmHeight; i++)
{
for (int j = 0; j < bm.bmWidth; j++)
{
blue = pData[i * nWidth + j * 2] & 0x1F;
green = pData[i * nWidth + j * 2] >> 5;
green |= (pData[i * nWidth + j * 2 + 1] & 0x03) << 3;
red = (pData[i * nWidth + j * 2 + 1] >> 2) & 0x1F; WORD wRed = red*8;
WORD wBlue = blue*8;
WORD wGreen = green*8; red = min(255, wRed);
blue = min(255, wBlue);
green = min(255, wGreen); dc.SetPixel(j, bm.bmHeight - i, RGB(red, green, blue));
}
}
}
else if (bm.bmBitsPixel == 24)
{
BYTE* pData = (BYTE*) buf; int nWidth = bm.bmWidth*3;
while (nWidth % 4 != 0)
{
nWidth++;
} for (int i = 0; i < bm.bmHeight; i++)
{
for (int j = 0; j < bm.bmWidth; j++)
{
dc.SetPixel(j, bm.bmHeight -
i,
RGB(pData[i * nWidth + j * 3 + 2],
pData[i * nWidth + j * 3 + 1],
pData[i * nWidth + j * 3]));
}
}
}
else if (bm.bmBitsPixel == 32)
{
BYTE* pData = (BYTE*) buf; int nWidth = bm.bmWidth*4; for (int i = 0; i < bm.bmHeight; i++)
{
for (int j = 0; j < bm.bmWidth; j++)
{
dc.SetPixel(j, bm.bmHeight -
i,
RGB(pData[i * nWidth + j * 4 + 2],
pData[i * nWidth + j * 4 + 1],
pData[i * nWidth + j * 4]));
}
}
} delete[]buf; DeleteObject(hBmp);
LocalFree(bmpInf);
}
改为
HDC hDC = this->GetDC();
this代表对话框本身
然后按上面的就ok