Greetings List,
I'm very new to font rendering and any type of graphics
manipulation so I apologize in advance if this question is
somewhat juvenile. I'm developing a web application and noticed that the
rendering that is happening for certain fonts in chrome is very different
than how some proprietary layout tools are rendering the same font. This
causes an issue for me as I'm trying to get the rendering to be somewhat
identical. I've been trying to use the free type library to pull out some
metrics to see if I could figure out what the rendering engines are doing
differently and if I could account for this difference. What I'm seeing is
that for some fonts, and for this example specifically Patua-one, there
appears to be a lot of white space from the top of the text within a glyph
to the top of the bounding box (vertical spae). In layman's terms, there
is a lot of white space in this font and that's the way it's been designed
I suppose. However, it appears some programs will remove this extra space
when rendering the font but others dont. So, I suppose my question boils
down to, is there a way to determine how much white space is present and/or
are there specific font metrics that specify this? I've read through the
online docs and have played with the api but was unable to find anything.
So my next approach was then to render a character using the gd library
and see if I could detect the pixel width based on color. Unfortunately it
looks like the gd library that php is using is removing this padding and
therefore my calculations are off. Appreciate any help in this matter
Thanks very much, here is a simple text drawing of the space I'm trying to
describe:
A (space)
| (space)
| (space)
| *
| *
| *
B *
where b is the baseline, a the accent, and the *'s represent the actual
glyph.
Andreas
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