void CDC::DPtoLP(LPSIZE lpSize) const
{
ASSERT(AfxIsValidAddress(lpSize, sizeof(SIZE)));
CSize sizeWinExt = GetWindowExt();
CSize sizeVpExt = GetViewportExt();
lpSize->cx = MulDiv(lpSize->cx, abs(sizeWinExt.cx), abs(sizeVpExt.cx));
lpSize->cy = MulDiv(lpSize->cy, abs(sizeWinExt.cy), abs(sizeVpExt.cy));
}
void ColorNode(HDC hDC, COLORREF rgb, COLORREF bgc,
int left, int top, int right, int bottom)
{
WORD wWidth = right - left;
WORD wHeight = bottom - top;
if (GetDeviceCaps(hDC, NUMCOLORS) <= 2)
PatBlt(hDC, left, top, wWidth, wHeight, DSTINVERT);
else
{
HBRUSH hBrush = CreateSolidBrush(rgb);
HDC hMemDC = CreateCompatibleDC(hDC);
HBITMAP hBitmap;
DWORD dwExt;
POINT pt;
SetMapMode(hMemDC, GetMapMode(hDC));
dwExt = GetWindowExt(hDC);
SetWindowExt(hMemDC, LOWORD(dwExt), HIWORD(dwExt));
dwExt = GetViewportExt(hDC);
SetViewportExt(hMemDC, LOWORD(dwExt), HIWORD(dwExt));
pt.x = wWidth;
pt.y = wHeight;
LPtoDP(hMemDC, &pt, 1);
hBitmap = CreateBitmap(pt.x, pt.y, 1, 1, NULL);
SelectObject(hMemDC, hBitmap);
SetBkColor(hDC, bgc);
BitBlt(hMemDC, 0, 0, wWidth, wHeight, hDC, left, top, SRCCOPY);
SetBkColor(hDC, rgb);
BitBlt(hDC, left, top, wWidth, wHeight, hMemDC, 0, 0, SRCCOPY);
DeleteDC(hMemDC);
DeleteObject(hBitmap);
SelectObject(hDC, GetStockObject(WHITE_BRUSH));
DeleteObject(hBrush);
SetBkColor(hDC, GetSysColor(COLOR_WINDOW));
}
}
