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Index ⭢ Text ⭢ BLFontDesignMetrics

BLFontDesignMetrics Struct Reference

Design metrics of a font.

Design metrics is information that BLFontFace collected directly from the font data. It means that all fields are measured in font design units.

When a new BLFont instance is created a scaled metrics BLFontMetrics is automatically calculated from BLFontDesignMetrics including other members like transformation, etc...

Public Members

int unitsPerEm

int lowestPPEM

int lineGap

int xHeight

int capHeight

union {

struct {

int ascent

int vAscent

int descent

int vDescent

int hMinLSB

int vMinLSB

int hMinTSB

int vMinTSB

int hMaxAdvance

int vMaxAdvance

}

struct {

int ascentByOrientation[2]

int descentByOrientation[2]

int minLSBByOrientation[2]

int minTSBByOrientation[2]

int maxAdvanceByOrientation[2]

}

};

BLBoxI glyphBoundingBox

int underlinePosition

int underlineThickness

int strikethroughPosition

int strikethroughThickness

Member Functions

void reset() noexcept

int BLFontDesignMetrics::unitsPerEm[¶]

Units per EM square.

int BLFontDesignMetrics::lowestPPEM[¶]

Lowest readable size in pixels.

int BLFontDesignMetrics::lineGap[¶]

Line gap.

int BLFontDesignMetrics::xHeight[¶]

Distance between the baseline and the mean line of lower-case letters.

int BLFontDesignMetrics::capHeight[¶]

Maximum height of a capital letter above the baseline.

int BLFontDesignMetrics::ascent[¶]

Ascent (horizontal layout).

int BLFontDesignMetrics::vAscent[¶]

Ascent (vertical layout).

int BLFontDesignMetrics::descent[¶]

Descent (horizontal layout).

int BLFontDesignMetrics::vDescent[¶]

Descent (vertical layout).

int BLFontDesignMetrics::hMinLSB[¶]

Minimum leading-side bearing (horizontal layout).

int BLFontDesignMetrics::vMinLSB[¶]

Minimum leading-side bearing (vertical layout).

int BLFontDesignMetrics::hMinTSB[¶]

Minimum trailing-side bearing (horizontal layout).

int BLFontDesignMetrics::vMinTSB[¶]

Minimum trailing-side bearing (vertical layout).

int BLFontDesignMetrics::hMaxAdvance[¶]

Maximum advance (horizontal layout).

int BLFontDesignMetrics::vMaxAdvance[¶]

Maximum advance (vertical layout).

int BLFontDesignMetrics::ascentByOrientation[2][¶]

Horizontal & vertical ascents.

int BLFontDesignMetrics::descentByOrientation[2][¶]

Horizontal & vertical descents.

int BLFontDesignMetrics::minLSBByOrientation[2][¶]

Minimum leading-side bearing (horizontal and vertical).

int BLFontDesignMetrics::minTSBByOrientation[2][¶]

Minimum trailing-side bearing (horizontal and vertical)..

int BLFontDesignMetrics::maxAdvanceByOrientation[2][¶]

Maximum advance width (horizontal) and height (vertical).

BLBoxI BLFontDesignMetrics::glyphBoundingBox[¶]

Aggregated bounding box of all glyphs in the font.

Note: This value is reported by the font data so it's not granted to be true.

int BLFontDesignMetrics::underlinePosition[¶]

Text underline position.

int BLFontDesignMetrics::underlineThickness[¶]

Text underline thickness.

int BLFontDesignMetrics::strikethroughPosition[¶]

Text strikethrough position.

int BLFontDesignMetrics::strikethroughThickness[¶]

Text strikethrough thickness.