private static IntPtr GetHalfToneBrush()
{
if (m_halfToneBrush == IntPtr.Zero)
{
Bitmap bitmap = new Bitmap(8, 8, PixelFormat.Format32bppArgb);
Color white = Color.FromArgb(255, 255, 255, 255);
Color black = Color.FromArgb(255, 0, 0, 0);
bool flag = true;
// Alternate black and white pixels across all lines
for (int x = 0; x < 8; x++, flag = !flag)
{
for (int y = 0; y < 8; y++, flag = !flag)
{
bitmap.SetPixel(x, y, (flag ? white : black));
}
}
IntPtr hBitmap = bitmap.GetHbitmap();
LOGBRUSH brush = new LOGBRUSH();
brush.lbStyle = (uint)Win32.BrushStyles.BS_PATTERN;
brush.lbHatch = (uint)hBitmap;
m_halfToneBrush = Gdi32.CreateBrushIndirect(ref brush);
Gdi32.DeleteObject(hBitmap);
}
return(m_halfToneBrush);
}
public static extern IntPtr CreateBrushIndirect(ref LOGBRUSH brush);