[Cairo] Re: [xsvg] cairo_text_extents ?
ellson at research.att.com
Wed Nov 26 07:11:45 PST 2003
Christof Petig wrote:
> IIRC the tuple x,y,w,h,advancex,advancey clearly covers all
> information needed for a glyph (advancex/advancey might depend on the
> next character (kerning)).
> x/y should equal bearingX/Y (x and y might be negative)
Right, they might be non-zero (positive or negative) w.r.t the x,y of
the origin. So, IMHO, naming the coordinates
for the lower-left of the bounding box "x" and "y" can lead to confusion.
Another issue to be considered is that the text string can be rotated.
I think that the terms "left-side-bearing" and "right-side-bearing" can
be more clearly
understood to be parallel to the baseline of the text, and similarly
"ascent" and "descent"
as perpendicular to the baseline.
I can see shortening "left-side-bearing" and "right-side-bearing" to
"left-bearing" and "right-bearing" if that would help?
Basically we're talking about the same four numbers. All we're
discussing is the names.
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