From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM
	autolearn=unavailable autolearn_force=no version=3.4.4
X-Received: by 2002:a24:6283:: with SMTP id d125mr7599967itc.14.1551578880308;
        Sat, 02 Mar 2019 18:08:00 -0800 (PST)
X-Received: by 2002:a9d:648f:: with SMTP id g15mr8096870otl.160.1551578880116;
 Sat, 02 Mar 2019 18:08:00 -0800 (PST)
Path: 
 eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!i2pn.org!weretis.net!feeder6.news.weretis.net!feeder.usenetexpress.com!feeder-in1.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!y42no264648ita.0!news-out.google.com!v188ni508itb.0!nntp.google.com!y22no264987ita.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups: comp.lang.ada
Date: Sat, 2 Mar 2019 18:07:59 -0800 (PST)
In-Reply-To: <2017103012171499678-contact@flyx.org>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com;
 posting-host=2602:306:cdc8:df00:e85e:614c:aba4:d3a5;
 posting-account=HhvOVAoAAADnEbcf1by-AG9O3vZXb9Zp
NNTP-Posting-Host: 2602:306:cdc8:df00:e85e:614c:aba4:d3a5
References: <2017103012171499678-contact@flyx.org>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <39682a44-7c1d-4d49-8663-b72f0bb0c4b5@googlegroups.com>
Subject: Re: ANN: OpenGLAda 0.6 and FreeTypeAda released
From: Rufas Cube <fastrgv@gmail.com>
Injection-Date: Sun, 03 Mar 2019 02:08:00 +0000
Content-Type: text/plain; charset="UTF-8"
Xref: reader01.eternal-september.org comp.lang.ada:55771
Date: 2019-03-02T18:07:59-08:00
List-Id: <comp.lang.ada>

On Monday, October 30, 2017 at 4:17:15 AM UTC-7, Felix Krause wrote:
> In this version, the dated FTGL binding has been replaced by a binding 
> to the FreeType library itself, which enables more flexibility for 
> drawing text. Furthermore, a package GL.Text has been added which 
> provides a more high-level API similar to FTGL. It depends on Dmitry A. 
> Kazakov's excellent Strings_Edit [2] package for UTF-8 decoding so that 
> it is easy to render any UTF-8 string.
> 
> Since the FreeType binding may be useful for purposes unrelated to 
> OpenGL, it is also available as a separate project [3]; however, it 
> currently has no own versioning scheme and no documentation and is 
> simply synchronized with the OpenGLAda repository. The binding is not 
> complete; it only wraps the parts that were necessary to use it with 
> OpenGL. This may improve in the future.
> 
> The current OpenGLAda release is available as tag of its repository [1].
> 
>  [1]: https://github.com/flyx/OpenGLAda/releases
>  [2]: http://www.dmitry-kazakov.de/ada/strings_edit.htm
>  [3]: https://github.com/flyx/FreeTypeAda
> 
> -- 
> Regards,
> Felix Krause

Just a note to mention that the fragment shader for rendering fonts needs a discard line so that the glBlendFunc works normally.  I added:
if( colour.a < 0.1 ) discard;
...but maybe you can determine a cutoff value that is more than a guess.
The consequence for NOT doing this is that the glyph backgrounds are sometimes visible, depending on the glBlendFunc parameters.
Rod