internal static bool Make(VGPath path, out StencilVertex[] vertices, out int tris)
{
vertices = null;
// Count triangles
tris =
path.GetCount(VGPath.SegmentType.CurveTo) * 2 +
path.GetCount(VGPath.SegmentType.LineTo) +
path.GetCount(VGPath.SegmentType._Tesselated);
if (tris == 0)
return false;
// Tesselate
vertices = new StencilVertex[tris * 3];
StencilVertex start = new StencilVertex();
Vector2 last = new Vector2();
int index = 0;
start.Set(0, 0, Constants.Coef_Solid);
for (var s = path.FirstSegment; s != null; s = s.Next)
{
switch (s.Value.Type)
{
case VGPath.SegmentType.CurveTo:
{
vertices[index++].Set(last.X, last.Y, Constants.Coef_Solid);
vertices[index++].Set(s.Value.Target.X, s.Value.Target.Y, Constants.Coef_Solid);
vertices[index++] = start;
vertices[index++].Set(last.X, last.Y, Constants.Coef_BezierStart);
vertices[index++].Set(s.Value.Controls[0].X, s.Value.Controls[0].Y, Constants.Coef_BezierControl);
vertices[index++].Set(s.Value.Target.X, s.Value.Target.Y, Constants.Coef_BezierEnd);
}
break;
case VGPath.SegmentType.LineTo:
case VGPath.SegmentType._Tesselated:
{
vertices[index++].Set(last.X, last.Y, Constants.Coef_Solid);
vertices[index++].Set(s.Value.Target.X, s.Value.Target.Y, Constants.Coef_Solid);
vertices[index++] = start;
}
break;
case VGPath.SegmentType.MoveTo:
{
start.Set(s.Value.Target.X, s.Value.Target.Y, Constants.Coef_Solid);
}
break;
default:
continue;
}
last = s.Value.Target;
}
return true;
}
internal static void CombineVertices(IDictionary<char, VGGlyphInfo> glyphs, out StencilVertex[] vertices, out CharBuffer[] definitions, out Vector4 extents)
{
int tris;
int count = glyphs.Count;
var verts = new List<StencilVertex>(256 * count);
var defs = new List<CharBuffer>(count);
extents = new Vector4();
foreach (var glyph in glyphs)
{
var path = glyph.Value.Path;
if (path == null)
continue;
if (!path.IsEmpty)
{
if (!FillMesh.Make(path, out vertices, out tris))
continue;
defs.Add(new CharBuffer { Character = glyph.Key, Offset = verts.Count, Triangles = tris });
verts.AddRange(vertices);
path.ExpandExtents(ref extents);
}
else
defs.Add(new CharBuffer { Character = glyph.Key, Offset = 0, Triangles = 0 });
}
definitions = defs.ToArray();
vertices = verts.ToArray();
}