GlyphOutline

Remarks

Curves are kept as curves. How finely to flatten one depends on how large it will be on screen, and a distance field wants the curve itself — the exact distance to a Bézier is a closed form, and a flattened one is a polygon whose facets show up as ripples in the field.

⚠ Both quadratic and cubic segments appear, and neither is converted to the other. TrueType draws in quadratics and CFF in cubics. A quadratic promotes to a cubic exactly, so that direction would be lossless — but it doubles the control points a distance function has to solve against for no gain, and the other direction is an approximation. A consumer handles both verbs.

Fields and properties (3)

• public static GlyphOutline Empty

  An outline with nothing in it — a space, or a glyph the font does not draw.

• public ImmutableArray<OutlineSegment> Segments

  The segments, in order, contour by contour.

• public bool IsEmpty

  Whether the glyph draws nothing.

Methods (2)

• public static GlyphOutline FromSegments(IEnumerable<OutlineSegment> segments)

  Builds an outline from segments that did not come from a font.

• public GlyphBounds Bounds(int samples = 32)

  The bounds of the drawn curve, in design units.

Used by (20)

• CffOutlinesVixen.Ui.Text
• DistanceFieldVixen.Ui.Text
• DistanceFieldTestsVixen.Ui.Text.Tests
• EdgeColoringVixen.Ui.Text
• FontFaceVixen.Ui.Text
• GlyfOutlinesVixen.Ui.Text
• GlyphAtlasTestsVixen.Ui.Text.Tests
• GlyphFieldCacheVixen.Ui.Text
• GlyphFieldCacheTestsVixen.Ui.Text.Tests
• GlyphOutlineSourceVixen.Ui.Text
• GlyphRasterizerVixen.Ui.Text
• IconAtlasVixen.Ui
• OutlineBuilderVixen.Ui.Text
• OutlineFlattenerVixen.Ui.Text
• OutlineTestsVixen.Ui.Text.Tests
• RasterizerTestsVixen.Ui.Text.Tests
• UiGeometryBuilderVixen.Ui
• UiGeometryTestsVixen.Ui.Tests
• VariationConformanceTestsVixen.Ui.Text.Tests
• FontAtlasViewVixen.Editor.AssetEditors