[SDL] Text output - getting more speed in SDL
keinhong at gmail.com
Sun Apr 15 01:16:32 PDT 2007
Leon Marrick wrote:
> The below contains the fastest text-output function I currently know how
> to write for SDL. It is faster than any SDL-based code I've been able to find
> on the Web: Not only does it run rings about "TTF_Render_Text()", it also
> leaves pre-rendering to a bitmap in the dust.
> But that don't mean a thing. The application I'm using SDL for requires
> a highly efficient text-output algorithm, which this one isn't. If you think
> you know something about code optimization using SDL, I'd be grateful if you
> had a look.
It looks rather horrifying. Saying "run rings about
TTF_Render_Text()" is over-simplifying a fair bit, since your
implementation cannot do grayscale glyphs. If someone wants a
general text output system that can be easily extended to use TTF
with grayscale, your implementation may need to be rewritten in
the long term.
Why isn't a glyph cache used? Is there some sort of memory
restriction? Do you really need the performance? The maximum
performance you need is what is enough to render a screenful of
glyphs at monitor refresh rate; anything more would not really
improve anything, I think.
> Any useful results will be emailed to Sam Lantinga.
I don't see the point of this; such implementation details are the
application domain, not in the libsdl domain, so why is there a
need for the above sentence?
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia
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