static public Color ColorFromPoint(Graphics g, int x, int y)
{
IntPtr hDC = g.GetHdc();
// Get the color of the pixel first
uint colorref = APIsGdi.GetPixel(hDC, x, y);
byte Red = GetRValue(colorref);
byte Green = GetGValue(colorref);
byte Blue = GetBValue(colorref);
g.ReleaseHdc(hDC);
return(Color.FromArgb(Red, Green, Blue));
}
public static void DrawText(Graphics graphics, string text, Font font, Rectangle rect)
{
IntPtr hdc = graphics.GetHdc();
IntPtr fontHandle = font.ToHfont();
IntPtr currentFontHandle = APIsGdi.SelectObject(hdc, fontHandle);
APIsGdi.SetBkMode(hdc, APIsEnums.BackgroundMode.TRANSPARENT);
APIsStructs.RECT rc = new APIsStructs.RECT();
rc.left = rect.Left;
rc.top = rect.Top;
rc.right = rc.left + rect.Width;
rc.bottom = rc.top + rect.Height;
APIsUser32.DrawText(hdc, text, text.Length, ref rc,
APIsEnums.DrawTextFormatFlags.SINGLELINE | APIsEnums.DrawTextFormatFlags.LEFT
| APIsEnums.DrawTextFormatFlags.MODIFYSTRING | APIsEnums.DrawTextFormatFlags.WORD_ELLIPSIS);
APIsGdi.SelectObject(hdc, currentFontHandle);
APIsGdi.DeleteObject(fontHandle);
graphics.ReleaseHdc(hdc);
}
public static Size GetTextSize(Graphics graphics, string text, Font font)
{
IntPtr hdc = IntPtr.Zero;
if (graphics != null)
{
// Get device context from the graphics passed in
hdc = graphics.GetHdc();
}
else
{
// Get screen device context
hdc = APIsGdi.GetDC(IntPtr.Zero);
}
IntPtr fontHandle = font.ToHfont();
IntPtr currentFontHandle = APIsGdi.SelectObject(hdc, fontHandle);
APIsStructs.RECT rect = new APIsStructs.RECT();
rect.left = 0;
rect.right = 0;
rect.top = 0;
rect.bottom = 0;
APIsUser32.DrawText(hdc, text, text.Length, ref rect,
APIsEnums.DrawTextFormatFlags.SINGLELINE | APIsEnums.DrawTextFormatFlags.LEFT | APIsEnums.DrawTextFormatFlags.CALCRECT);
APIsGdi.SelectObject(hdc, currentFontHandle);
APIsGdi.DeleteObject(fontHandle);
if (graphics != null)
{
graphics.ReleaseHdc(hdc);
}
else
{
APIsUser32.ReleaseDC(IntPtr.Zero, hdc);
}
return(new Size(rect.right - rect.left, rect.bottom - rect.top));
}
