public TextLayout(
TextServiceDirectWrite service,
string line,
Graphics _graphics,
Font _font)
{
try
{
int hr;
text = line;
lineInterop = new TextServiceLineDirectWriteInterop();
hr = lineInterop.Init(service.interop, line, line.Length);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
#if true
uniscribeLine = service.uniscribeService.AnalyzeText(_graphics, _font, _font.Height, line);
#else // TODO: support Windows.Data.Text for universal script segmentation support
#endif
}
catch (Exception)
{
Dispose();
throw;
}
}
public static void DrawText(Graphics graphics, string text, Font font, Rectangle bounds, Color foreColor, Color backColor, TextFormatFlags flags)
{
TextServiceDirectWriteInterop interop = EnsureInterop(font);
TextServiceLineDirectWriteInterop localLineInterop = lineInterop;
lineInterop = null;
try
{
if (localLineInterop == null)
{
localLineInterop = new TextServiceLineDirectWriteInterop();
}
int hr = localLineInterop.Init(interop, text, text.Length);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
if ((flags & TextFormatFlags.HorizontalCenter) != 0)
{
Size size;
hr = localLineInterop.GetExtent(graphics, out size);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
bounds.X += (bounds.Width - size.Width) / 2;
bounds.Width += size.Width / 2;
}
localLineInterop.DrawTextWithRenderTarget(graphics, bounds, foreColor, backColor);
}
finally
{
if (localLineInterop != null) // always clear contained references
{
localLineInterop.Dispose();
}
if (lineInterop != null)
{
lineInterop.Dispose();
}
lineInterop = localLineInterop;
}
}
//public static Size MeasureText(string text, Font font);
public static Size MeasureText(Graphics graphics, string text, Font font)
{
TextServiceDirectWriteInterop interop = EnsureInterop(font);
TextServiceLineDirectWriteInterop localLineInterop = lineInterop;
lineInterop = null;
try
{
if (localLineInterop == null)
{
localLineInterop = new TextServiceLineDirectWriteInterop();
}
int hr = localLineInterop.Init(interop, text, text.Length);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Size extent;
hr = localLineInterop.GetExtent(graphics, out extent);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
return extent;
}
finally
{
if (localLineInterop != null) // always clear contained references
{
localLineInterop.Dispose();
}
if (lineInterop != null)
{
lineInterop.Dispose();
}
lineInterop = localLineInterop;
}
}
