[Harfbuzz-indic] Fwd: hb-view and beyond

[Shiva Kumar H R]

:-) Thank you for checking. I hadn't subscribed to harfbuzz list earlier. I
have subscribed now.

-- 
Thanks & Regards,
Shiva Kumar H R
http://people.apache.org/~shivahr/

On Tue, Sep 20, 2011 at 11:58 PM, Behdad Esfahbod <behdad at behdad.org> wrote:

> FYI.  BTW, is it safe to assume that everyone on harfbuzz-indic is on
> harfbuzz
> list also?
>
> behdad
>
> -------- Original Message --------
> Subject: hb-view and beyond
> Date: Tue, 20 Sep 2011 13:36:39 -0400
> From: Behdad Esfahbod <behdad at behdad.org>
> To: Harfbuzz <harfbuzz at lists.freedesktop.org>
>
> Hi all,
>
> Those paying attention may have noticed that hb-view got quite a lift:
>
>  - hb-view now has a full --help output and reworked options (major break
> was
> changing --output to --output-file),
>
>  - hb-view can generate PDF, PS, EPS, and SVG now, assuming your cairo
> supports these,
>
>  - The --text-file and --font-file (or its implicit substitutes) can be "-"
> for stdin.  And both stdin and stdout functions work on Windows too (this
> was
> a challenge to make work!)
>
>  - Of note, also, is the --shapers option.  If you pass only one shaper to
> --shapers and that shaper fails, hb-view will fail.
>
> Note: There's still problems reading Unicode text from the command-line
> arguments.  You can use --text-file to work around that.
>
>
> Moreover, there is now an hb-shape binary also, which outputs shape results
> in
> a (cryptic) human-readable way.  I plan to add more verbose formats as well
> as
> JSON and XML too.  But for now, this is how it looks like:
>
>
> <uni0905=0+1602|uni092C=3+1228|uni0942=3 at 1,-174>
>
> That is:
>
>  - Glyphs are separated using '|'
>
>  - The cluster value comes after '='
>
>  - If there's X or Y offset, they come after '@'
>
>  - If there is advance, they come after '+'.  Maybe I should change this
> one
> to '>' or something.
>
> There are options to disable outputing the cluster value or the positions,
> or
> use glyph indices instead of glyph names.
>
>
> Finally, there is a Python program called hb-diff, which can compare the
> output of hb-shape from two different backends and visualize the
> differences
> colorfully.  Give it a try!
>
>
> So, as you can see, I'm much closer o having a measurable definition of
> Indic
> correctness.  Preliminary results look promising.
>
> Cheers,
> behdad
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