/// <summary>
/// Adds a text string to this path.
/// </summary>
public void AddString(string s, XFontFamily family, XFontStyle style, double emSize, XRect layoutRect,
XStringFormat format)
{
if (s == null)
{
throw new ArgumentNullException("s");
}
if (family == null)
{
throw new ArgumentNullException("family");
}
if (format == null)
{
format = XStringFormats.Default;
}
if (format.LineAlignment == XLineAlignment.BaseLine && layoutRect.Height != 0)
{
throw new InvalidOperationException(
"DrawString: With XLineAlignment.BaseLine the height of the layout rectangle must be 0.");
}
if (s.Length == 0)
{
return;
}
XFont font = new XFont(family.Name, emSize, style);
DiagnosticsHelper.HandleNotImplemented("XGraphicsPath.AddString");
}
// ----- AddString ----------------------------------------------------------------------------
/// <summary>
/// Adds a text string to this path.
/// </summary>
public void AddString(string s, XFontFamily family, XFontStyle style, double emSize, XPoint origin,
XStringFormat format)
{
try
{
DiagnosticsHelper.HandleNotImplemented("XGraphicsPath.AddString");
}
catch
{
throw;
}
}
/// <summary>
/// Measure string directly from font data.
/// </summary>
public static XSize MeasureString(string text, XFont font, XStringFormat stringFormat)
{
XSize size = new XSize();
OpenTypeDescriptor descriptor = FontDescriptorCache.GetOrCreateDescriptorFor(font) as OpenTypeDescriptor;
if (descriptor != null)
{
// Height is the sum of ascender and descender.
size.Height = (descriptor.Ascender + descriptor.Descender) * font.Size / font.UnitsPerEm;
Debug.Assert(descriptor.Ascender > 0);
bool symbol = descriptor.FontFace.cmap.symbol;
int length = text.Length;
int width = 0;
for (int idx = 0; idx < length; idx++)
{
char ch = text[idx];
// HACK: Unclear what to do here.
if (ch < 32)
{
continue;
}
if (symbol)
{
// Remap ch for symbol fonts.
ch = (char)(ch | (descriptor.FontFace.os2.usFirstCharIndex & 0xFF00)); // @@@ refactor
// Used | instead of + because of: http://PdfSharpCore.codeplex.com/workitem/15954
}
int glyphIndex = descriptor.CharCodeToGlyphIndex(ch);
width += descriptor.GlyphIndexToWidth(glyphIndex);
}
// What? size.Width = width * font.Size * (font.Italic ? 1 : 1) / descriptor.UnitsPerEm;
size.Width = width * font.Size / descriptor.UnitsPerEm;
// Adjust bold simulation.
if ((font.GlyphTypeface.StyleSimulations & XStyleSimulations.BoldSimulation) == XStyleSimulations.BoldSimulation)
{
// Add 2% of the em-size for each character.
// Unsure how to deal with white space. Currently count as regular character.
size.Width += length * font.Size * Const.BoldEmphasis;
}
}
Debug.Assert(descriptor != null, "No OpenTypeDescriptor.");
return(size);
}
