TtfFont class

High-level interface for a loaded TrueType font.

Wraps TtfParser with caching, metrics, and pixel-scale APIs.

Load a font:

final bytes = File('/path/to/Roboto-Regular.ttf').readAsBytesSync();
final font = TtfFont.load(bytes);

Render text (with FontLoader + ParagraphBuilder — see Phase 4+):

final glyphId = font.getGlyphId('A'.codeUnitAt(0));
if (glyphId != null) {
  final outline = font.getGlyphOutline(glyphId);
  final advance = font.getAdvanceWidth(glyphId, 16.0);
}

Properties

availableTables → Set<String>
The set of TTF table tags available in this font.
no setter
glyphCount → int
Total number of glyphs in the font.
no setter
hashCode → int
The hash code for this object.
no setterinherited
hasKerning → bool
Whether a kern table is present.
no setter
metrics → FontMetrics
Typographic metrics for this font.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

getAdvanceWidth(int glyphId, double fontSize) → double
Advance width for glyphId scaled to fontSize in pixels.
getGlyphId(int codePoint) → int?
Returns the glyph ID for codePoint, or null if the character is not mapped in this font.
getGlyphOutline(int glyphId) → GlyphOutline?
Returns the glyph outline for glyphId, or null if the glyph data cannot be parsed (e.g. the glyph ID is out of range).
getKerning(int glyphId1, int glyphId2, double fontSize) → double
Pair-kerning adjustment between two consecutive glyphs, in pixels.
getLsb(int glyphId) → int
Left side bearing for glyphId in font units (unscaled).
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

load(Uint8List bytes) → TtfFont
Loads a TTF/OTF font from raw bytes.