text

type Alignment uint8

type Flags uint16

type FontFace = giofont.FontFace

type Glyph struct {
	// ID is a unique, per-shaper identifier for the shape of the glyph.
	// Glyphs from the same shaper will share an ID when they are from
	// the same face and represent the same glyph at the same size.
	ID GlyphID

	// X is the x coordinate of the dot for this glyph in document coordinates.
	X fixed.Int26_6
	// Y is the y coordinate of the dot for this glyph in document coordinates.
	Y int32

	// Advance is the logical width of the glyph. The glyph may be visually
	// wider than this.
	Advance fixed.Int26_6
	// Ascent is the distance from the dot to the logical top of glyphs in
	// this glyph's face. The specific glyph may be shorter than this.
	Ascent fixed.Int26_6
	// Descent is the distance from the dot to the logical bottom of glyphs
	// in this glyph's face. The specific glyph may descend less than this.
	Descent fixed.Int26_6
	// Offset encodes the origin of the drawing coordinate space for this glyph
	// relative to the dot. This value is used when converting glyphs to paths.
	Offset fixed.Point26_6
	// Bounds encodes the visual dimensions of the glyph relative to the dot.
	Bounds fixed.Rectangle26_6
	// Runes is the number of runes represented by the glyph cluster this glyph
	// belongs to. If Flags does not contain FlagClusterBreak, this value will
	// always be zero. The final glyph in the cluster contains the runes count
	// for the entire cluster.
	Runes uint16
	// Flags encode special properties of this glyph.
	Flags Flags
}

type GlyphID uint64

type Parameters struct {
	// Font describes the preferred typeface.
	Font giofont.Font
	// Alignment characterizes the positioning of text within the line. It does not directly
	// impact shaping, but is provided in order to allow efficient offset computation.
	Alignment Alignment
	// PxPerEm is the pixels-per-em to shape the text with.
	PxPerEm fixed.Int26_6
	// MaxLines limits the quantity of shaped lines. Zero means no limit.
	MaxLines int
	// Truncator is a string of text to insert where the shaped text was truncated, which
	// can currently ohly happen if MaxLines is nonzero and the text on the final line is
	// truncated.
	Truncator string

	// WrapPolicy configures how line breaks will be chosen when wrapping text across lines.
	WrapPolicy WrapPolicy

	// MinWidth and MaxWidth provide the minimum and maximum horizontal space constraints
	// for the shaped text.
	MinWidth, MaxWidth int
	// Locale provides primary direction and language information for the shaped text.
	Locale system.Locale

	// LineHeightScale is a scaling factor applied to the LineHeight of a paragraph. If zero, a default
	// value of 1.2 will be used.
	LineHeightScale float32

	// LineHeight is the distance between the baselines of two lines of text. If zero, the PxPerEm
	// of the any given paragraph will set the LineHeight of that paragraph. This value will be
	// scaled by LineHeightScale, so applications desiring a specific fixed value
	// should set LineHeightScale to 1.
	LineHeight fixed.Int26_6
	// contains filtered or unexported fields
}

type Range struct {
	// Count describes the number of items represented by the Range.
	Count int
	// Offset describes the start position of the represented
	// items within a larger list.
	Offset int
}

type Shaper struct {
	// contains filtered or unexported fields
}

type ShaperOption func(*Shaper)

type WrapPolicy uint8