internal GdiFontMetrics(GdiDeviceContent dc, GdiFont currentFont)
{
if (dc.Handle == IntPtr.Zero)
{
throw new ArgumentNullException("dc", "Handle to device context cannot be null");
}
if (dc.GetCurrentObject(GdiDcObject.Font) == IntPtr.Zero)
{
throw new ArgumentException("dc", "No font selected into supplied device context");
}
this.dc = dc;
this.currentFont = currentFont;
// FontFileReader requires the font facename because the font may exist in
// a TrueType collection.
StringBuilder builder = new StringBuilder(255);
LibWrapper.GetTextFace(dc.Handle, builder.Capacity, builder);
faceName = builder.ToString();
ranges = new GdiUnicodeRanges(dc);
reader = new FontFileReader(new MemoryStream(GetFontData()), faceName);
converter = new PdfUnitConverter(EmSquare);
// After we have cached the font data, we can safely delete the resource
currentFont.Dispose();
}
/// <summary>
/// Creates a font whose height is equal to the negative value
/// of the EM Square
/// </summary>
/// <param name="faceName">The typeface name of a font.</param>
/// <returns></returns>
public static GdiFont CreateDesignFont(string faceName, bool bold, bool italic, GdiDeviceContent dc)
{
GdiFont tempFont = GdiFont.CreateFont(faceName, 2048, bold, italic);
dc.SelectFont(tempFont);
GdiFontMetrics metrics = tempFont.GetMetrics(dc);
tempFont.Dispose();
return(CreateFont(faceName, -Math.Abs(metrics.EmSquare), bold, italic));
}
/// <summary>
/// Creates a font whose height is equal to the negative value
/// of the EM Square
/// </summary>
/// <param name="faceName">The typeface name of a font.</param>
/// <returns></returns>
public static GdiFont CreateDesignFont(string faceName, bool bold, bool italic, GdiDeviceContent dc)
{
// TODO: Is there a simpler method of obtaining the em-sqaure?
GdiFont tempFont = GdiFont.CreateFont(faceName, 2048, bold, italic);
dc.SelectFont(tempFont);
GdiFontMetrics metrics = tempFont.GetMetrics(dc);
tempFont.Dispose();
return(CreateFont(faceName, -Math.Abs(metrics.EmSquare), bold, italic));
}
internal GdiFontMetrics(GdiDeviceContent dc, GdiFont currentFont) {
if (dc.Handle == IntPtr.Zero) {
throw new ArgumentNullException("dc", "Handle to device context cannot be null");
}
if (dc.GetCurrentObject(GdiDcObject.Font) == IntPtr.Zero) {
throw new ArgumentException("dc", "No font selected into supplied device context");
}
this.dc = dc;
this.currentFont = currentFont;
// FontFileReader requires the font facename because the font may exist in
// a TrueType collection.
StringBuilder builder = new StringBuilder(255);
LibWrapper.GetTextFace(dc.Handle, builder.Capacity, builder);
faceName = builder.ToString();
ranges = new GdiUnicodeRanges(dc);
reader = new FontFileReader(new MemoryStream(GetFontData()), faceName);
converter = new PdfUnitConverter(EmSquare);
// After we have cached the font data, we can safely delete the resource
currentFont.Dispose();
}
/// <summary>
/// Selects a font into a device context (DC). The new object
/// replaces the previous object of the same type.
/// </summary>
/// <param name="font">Handle to object.</param>
/// <returns>A handle to the object being replaced.</returns>
public IntPtr SelectFont(GdiFont font)
{
return(LibWrapper.SelectObject(hDC, font.Handle));
}
/// <summary>
/// Selects a font into a device context (DC). The new object
/// replaces the previous object of the same type.
/// </summary>
/// <param name="font">Handle to object.</param>
/// <returns>A handle to the object being replaced.</returns>
public IntPtr SelectFont(GdiFont font) {
return LibWrapper.SelectObject(hDC, font.Handle);
}