class Cairo::TextExtents

• Cairo::TextExtents
• Reference
• Object

Overview

The TextExtents structure stores the extents of a single glyph or a string of glyphs in user-space coordinates. Because text extents are in user-space coordinates, they are mostly, but not entirely, independent of the current transformation matrix. If you call context.scale(2.0, 2.0), text will be drawn twice as big, but the reported text extents will not be doubled. They will change slightly due to hinting (so you can't assume that metrics are independent of the transformation matrix), but otherwise will remain unchanged.

Defined in:

cairo/text_extents.cr

Constructors

• .new(x_bearing : Float64, y_bearing : Float64, width : Float64, height : Float64, x_advance : Float64, y_advance : Float64)
• .new(text_extents : LibCairo::TextExtentsT)
• .new

Instance Method Summary

• #height : Float64

  Height of the glyphs as drawn.

• #height=(height : Float64)
• #to_cairo_text_extents : LibCairo::TextExtentsT
• #to_unsafe : LibCairo::PTextExtentsT
• #width : Float64

  Width of the glyphs as drawn.

• #width=(width : Float64)
• #x_advance : Float64

  Distance to advance in the X direction after drawing these glyphs.

• #x_advance=(x_advance : Float64)
• #x_bearing : Float64

  The horizontal distance from the origin to the leftmost part of the glyphs as drawn.

• #x_bearing=(x_bearing : Float64)
• #y_advance : Float64

  Distance to advance in the Y direction after drawing these glyphs.

• #y_advance=(y_advance : Float64)
• #y_bearing : Float64

  The vertical distance from the origin to the topmost part of the glyphs as drawn.

• #y_bearing=(y_bearing : Float64)

Constructor Detail

Instance Method Detail