FontMetrics class

Typographic metrics for a loaded TTF/OTF font.

All values are in font design units (as stored in the font file). To convert to pixels at a given fontSize:

final scale = fontSize / metrics.unitsPerEm;
final ascenderPx = metrics.ascender * scale;

Constructors

FontMetrics({required int unitsPerEm, required int ascender, required int descender, required int lineGap, required int capHeight, required int xHeight})
const

Properties

ascender → int
Distance from the baseline to the top of the em square, in font units.
final
capHeight → int
Height of capital letters above the baseline, in font units.
final
descender → int
Distance from the baseline to the bottom of the em square, in font units.
final
hashCode → int
The hash code for this object.
no setterinherited
lineGap → int
Additional line spacing recommended by the font designer, in font units.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
unitsPerEm → int
Number of font design units per em.
final
xHeight → int
Height of lowercase 'x' above the baseline, in font units.
final

Methods

baselineOffsetAt(double fontSize) → double
Distance from the top of the line box to the baseline, in pixels.
lineHeightAt(double fontSize) → double
Line height recommended for this font at the given fontSize in pixels.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
override

Operators

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