diff options
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/X11/Fl_X11_Gl_Window_Driver.cxx | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/drivers/X11/Fl_X11_Gl_Window_Driver.cxx b/src/drivers/X11/Fl_X11_Gl_Window_Driver.cxx index bbcebbd84..3f09edae2 100644 --- a/src/drivers/X11/Fl_X11_Gl_Window_Driver.cxx +++ b/src/drivers/X11/Fl_X11_Gl_Window_Driver.cxx @@ -388,6 +388,8 @@ int Fl_X11_Gl_Window_Driver::mode_(int m, const int *a) { } void Fl_X11_Gl_Window_Driver::swap_buffers() { + if (!fl_xid(pWindow)) // window not shown + return; glXSwapBuffers(fl_display, fl_xid(pWindow)); } |