Struct cairo_text_extents_t
The cairo_text_extents_t 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
cairo_scale(cr, 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.
Fields
| Name |
Type |
Description |
height
|
double |
height of the glyphs as drawn
|
width
|
double |
width of the glyphs as drawn
|
x_advance
|
double |
distance to advance in the X direction
after drawing these glyphs
|
x_bearing
|
double |
the horizontal distance from the origin to the
leftmost part of the glyphs as drawn. Positive if the
glyphs lie entirely to the right of the origin.
|
y_advance
|
double |
distance to advance in the Y direction
after drawing these glyphs. Will typically be zero except
for vertical text layout as found in East-Asian languages.
|
y_bearing
|
double |
the vertical distance from the origin to the
topmost part of the glyphs as drawn. Positive only if the
glyphs lie completely below the origin; will usually be
negative.
|