GstGLAPI
gboolean gst_gl_check_extension (const char *name, const gchar *ext);
const char *name
const gchar *ext
#define GST_GL_CHECK_GL_VERSION(driver_major, driver_minor, \ target_major, target_minor)
GST_GL_API_NONE
GST_GL_API_OPENGL
GST_GL_API_OPENGL3
GST_GL_API_GLES1
GST_GL_API_GLES2
GST_GL_API_GLES3
GST_GL_API_ANY