internal SVGFontProvider(string name, SortedList <string, SVGGlyph> glyph,
SortedList <ComparablePair <char, char>, float> kernelling, SVGGlyph defaultGlyph)
{
this.name = name;
this.glyphs = glyph;
this.kernelling = kernelling;
this.defaultGlyph = defaultGlyph;
}
public SVGFontProvider ImportSVG(XmlDocument document)
{
XmlNode font = document["svg"]["defs"]["font"];
if (font == null)
{
throw new ArgumentException("The document does not include any fonts.");
}
// We write basic properties (for normalization).
string name = font["font-face"]["font-family"] != null ? font["font-face"]["font-family"].InnerText : "unknown";
// We extract data.
if (font.Attributes["horiz-origin-x"] != null)
{
horizOriginX = int.Parse(font.Attributes["horiz-origin-x"].InnerText);
}
if (font.Attributes["horiz-origin-y"] != null)
{
horizOriginY = int.Parse(font.Attributes["horiz-origin-y"].InnerText);
}
if (horizOriginX != 0 || horizOriginY != 0)
{
throw new NotSupportedException();
}
if (font.Attributes["horiz-adv-x"] != null)
{
horizAdvX = int.Parse(font.Attributes["horiz-adv-x"].InnerText);
}
// We now extract glyphs.
// TODO: extract missing gylph.
SVGGlyph def = ProcessDefGlyph(font["missing-glyph"]);
// Extract each glyph.
foreach (XmlNode node in font)
{
if (node.Name == "glyph")
{
ProcessGlyph(node);
}
}
// We now rescale each glyph to range in y to [0,1].
float scale = 1.0f / maxDimensions.Y;
Matrix3x3f matrix = Matrix3x3f.CreateScale(new Vector3f(scale, scale, scale));
foreach (KeyValuePair <string, SVGGlyph> pair in glyphs)
{
// We scale outline.
pair.Value.Outline.Transform(matrix);
pair.Value.Advance *= scale;
}
// Transform default.
def.Advance *= scale;
def.Outline.Transform(matrix);
ImportKernellings(font);
SortedList <ComparablePair <char, char>, float> r = new SortedList <ComparablePair <char, char>, float>();
// We normalize kernellig (also negatie, since the + meaning is shrink in SVG, in our format,
// it is enlarge).
for (int z = 0; z < kernelling.Count; z++)
{
r.Add(kernelling.Keys[z], kernelling.Values[z] * -scale);
}
return(new SVGFontProvider(name, glyphs, r, def));
}
