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docs: Improve description of gdk_gl_context_is_legacy()

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Explain why this function is available, and why you may need it.

https://bugzilla.gnome.org/show_bug.cgi?id=756142
This commit is contained in:
Emmanuele Bassi 2015-10-07 08:50:23 +01:00
parent 9601479f0c
commit 59d02afec0
1 changed files with 14 additions and 1 deletions
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15
gdk/gdkglcontext.c
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@ -564,7 +564,20 @@ gdk_gl_context_get_required_version (GdkGLContext *context,
*
* Whether the #GdkGLContext is in legacy mode or not.
*
* The #GdkGLContext must be realized.
* The #GdkGLContext must be realized before calling this function.
*
* When realizing a GL context, GDK will try to use the OpenGL 3.2 core
* profile; this profile removes all the OpenGL API that was deprecated
* prior to the 3.2 version of the specification. If the realization is
* successful, this function will return %FALSE.
*
* If the underlying OpenGL implementation does not support core profiles,
* GDK will fall back to a pre-3.2 compatibility profile, and this function
* will return %TRUE.
*
* You can use the value returned by this function to decide which kind
* of OpenGL API to use, or whether to do extension discovery, or what
* kind of shader programs to load.
*
* Returns: %TRUE if the GL context is in legacy mode
*