Exemplo n.º 1
0
        /// <summary>
        /// Create a WPF GlyphTypeface and retrieve font data from it.
        /// </summary>
        internal static XFontSource CreateFontSource(string familyName, FontResolvingOptions fontResolvingOptions,
                                                     out WpfFontFamily wpfFontFamily, out WpfTypeface wpfTypeface, out WpfGlyphTypeface wpfGlyphTypeface, string typefaceKey)
        {
            if (string.IsNullOrEmpty(typefaceKey))
            {
                typefaceKey = XGlyphTypeface.ComputeKey(familyName, fontResolvingOptions);
            }
            XFontStyle style = fontResolvingOptions.FontStyle;

#if DEBUG
            if (StringComparer.OrdinalIgnoreCase.Compare(familyName, "Segoe UI Semilight") == 0 &&
                (style & XFontStyle.BoldItalic) == XFontStyle.Italic)
            {
                familyName.GetType();
            }
#endif

            // Use WPF technique to create font data.
            wpfTypeface = XPrivateFontCollection.TryCreateTypeface(familyName, style, out wpfFontFamily);
#if DEBUG__
            if (wpfTypeface != null)
            {
                WpfGlyphTypeface          glyphTypeface;
                ICollection <WpfTypeface> list = wpfFontFamily.GetTypefaces();
                foreach (WpfTypeface tf in list)
                {
                    if (!tf.TryGetGlyphTypeface(out glyphTypeface))
                    {
                        Debug - Break.Break();
                    }
                }

                //if (!WpfTypeface.TryGetGlyphTypeface(out glyphTypeface))
                //    throw new InvalidOperationException(PSSR.CannotGetGlyphTypeface(familyName));
            }
#endif
            if (wpfFontFamily == null)
            {
                wpfFontFamily = new WpfFontFamily(familyName);
            }

            if (wpfTypeface == null)
            {
                wpfTypeface = FontHelper.CreateTypeface(wpfFontFamily, style);
            }

            // Let WPF choose the right glyph typeface.
            if (!wpfTypeface.TryGetGlyphTypeface(out wpfGlyphTypeface))
            {
                throw new InvalidOperationException(PSSR.CannotGetGlyphTypeface(familyName));
            }

            // Get or create the font source and cache it unter the specified typeface key.
            XFontSource fontSource = XFontSource.GetOrCreateFromWpf(typefaceKey, wpfGlyphTypeface);
            return(fontSource);
        }