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Diffstat (limited to 'documentation')
| -rw-r--r-- | documentation/src/opengl.dox | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/documentation/src/opengl.dox b/documentation/src/opengl.dox index d1a36be11..68f5e71aa 100644 --- a/documentation/src/opengl.dox +++ b/documentation/src/opengl.dox @@ -605,6 +605,36 @@ to be created among your Fl_Gl_Window-derived classes: \endcode after the first glutCreateWindow() call. +\li If the GL3-using window is intended to contain FLTK widgets laid over +the GL3 scene (see \ref opengl_with_fltk_widgets), extra steps are necessary to make this possible in a +cross-platform way. +<ol><li>Create a function called, say, add_widgets(), charged of the creation +of all FLTK widgets expected to be drawn above the GL3 scene, as follows +\code +void add_widgets(Fl_Gl_Window *g) { +#ifdef __APPLE__ + g = fl_mac_prepare_add_widgets_to_GL3_win(g); +#endif + g->begin(); + // … Create here FLTK widgets expected to be drawn above the GL3 scene … + g->end(); +} +\endcode +and call this function with the GL3-using window as argument to populate it +with FLTK widgets. +<li> +Put +\code +#ifndef __APPLE__ + glUseProgram(0); // Switch from GL3-style to GL1-style drawing + Fl_Gl_Window::draw(); // Draw FLTK child widgets. +#endif +\endcode +at the end of your GL3 window's draw() function. This is not necessary if +the GL3 window is built by GLUT, because Fl_Glut_Window::draw() does it. + +</ol> + If GLEW is installed on the Mac OS development platform, it is possible to use the same code for all platforms, with one exception: put \code |