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@pdfa-lab/fontkit / GlyphLayoutMetrics

Interface: GlyphLayoutMetrics ​

Defined in: src/glyph/glyph.ts:40

Represents the comprehensive, multi-axis bounding metrics for a specific glyph.

This unified structure combines data resolved from both horizontal and vertical layout systems, making it the primary interface for high-level rendering engines, text-shaping loops, and bounding-box calculators.

Properties ​

advanceHeight ​

advanceHeight: number

Defined in: src/glyph/glyph.ts:51

The vertical advance height of the glyph, indicating how much to shift the Y-cursor when rendering in vertical writing mode. Sourced from the vmtx table.

advanceWidth ​

advanceWidth: number

Defined in: src/glyph/glyph.ts:45

The horizontal advance width of the glyph, indicating how much to shift the X-cursor after rendering. Sourced from the hmtx table.

leftBearing ​

leftBearing: number

Defined in: src/glyph/glyph.ts:57

The distance from the horizontal origin (X = 0) to the leftmost edge of the glyph's outline. Also known as Left Side Bearing (LSB).

topBearing ​

topBearing: number

Defined in: src/glyph/glyph.ts:63

The distance from the vertical origin (Y = 0) to the top edge of the glyph's outline. Also known as Top Side Bearing (TSB).