Re: Low-level text, why so hard?
Re: Low-level text, why so hard?
- Subject: Re: Low-level text, why so hard?
- From: Kyle Sluder <email@hidden>
- Date: Sun, 23 Dec 2012 23:25:44 -0800
On Sun, Dec 23, 2012, at 09:32 PM, Graham Cox wrote:
> I need to use Quartz to draw a single character - a check mark - in a
> graphics context. I don't need anything elaborate, no typesetting etc, I
> just want to draw a single checkmark.
By far the simplest approach here is going to be to make an image that
contains a checkmark. Developers are discouraged from using low-level
text attributes because it completely ignores all the important
high-level stuff that goes in to making text look good. You're not
really drawing text here.
> However, Quartz seemingly makes the trivial very difficult. Why for
> example, does this code not work? Specifically, it returns 0 from
> CGFontGetGlyphWithGlyphName meaning that the glyph name is unknown.
CGFontGetGlyphWithGlyphName (and all of CGFont) deals in TrueType/AAT
concepts, NOT Unicode concepts. Unicode does not even name glyphs; it
names codepoints. The glyph names you provide to this function are the
kind that would be found in the font's `post` table, not Unicode
codepoint names.
--Kyle Sluder
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