/// <summary>
/// Measure the width and height of string <paramref name="str"/> when drawn on device context HDC
/// using the given font <paramref name="font"/>.<br/>
/// Restrict the width of the string and get the number of characters able to fit in the restriction and
/// the width those characters take.
/// </summary>
/// <param name="str">the string to measure</param>
/// <param name="font">the font to measure string with</param>
/// <param name="maxWidth">the max width to render the string in</param>
/// <param name="charFit">the number of characters that will fit under <see cref="maxWidth"/> restriction</param>
/// <param name="charFitWidth"></param>
/// <returns>the size of the string</returns>
public static PixelFarm.Drawing.Size MeasureString(
char[] buff, int startAt, int len, RequestFont font,
float maxWidth, out int charFit, out int charFitWidth)
{
SetFont(font);
if (buff.Length == 0)
{
charFit = 0;
charFitWidth = 0;
return(PixelFarm.Drawing.Size.Empty);
}
var size = new Win32.Size(); //win32
unsafe
{
fixed(char *startAddr = &buff[0])
{
NativeTextWin32.UnsafeGetTextExtentExPoint(
s_win32MemDc.DC, startAddr + startAt, len,
(int)Math.Round(maxWidth), s_charFit, s_charFitWidth, ref size);
}
}
charFit = s_charFit[0];
charFitWidth = charFit > 0 ? s_charFitWidth[charFit - 1] : 0;
return(new PixelFarm.Drawing.Size(size.W, size.H));
//}
}
public static PixelFarm.Drawing.Size MeasureString(char[] buff, int startAt, int len, RequestFont font)
{
SetFont(font);
Win32.Size win32_size = new Win32.Size();
if (buff.Length > 0)
{
unsafe
{
fixed(char *startAddr = &buff[0])
{
NativeTextWin32.UnsafeGetTextExtentPoint32(s_win32MemDc.DC, startAddr + startAt, len, ref win32_size);
}
}
}
return(new PixelFarm.Drawing.Size(win32_size.W, win32_size.H));
}
