ANN: OpenGLAda 0.6 and FreeTypeAda released

ANN: OpenGLAda 0.6 and FreeTypeAda released

[Felix Krause]

In this version, the dated FTGL binding has been replaced by a binding 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

Re: ANN: OpenGLAda 0.6 and FreeTypeAda released

[Rufas Cube]

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 In this version, the dated FTGL binding has been replaced by a binding 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