diff options
Diffstat (limited to 'documentation/src/osissues.dox')
| -rw-r--r-- | documentation/src/osissues.dox | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/documentation/src/osissues.dox b/documentation/src/osissues.dox index 790899765..86b05b9c0 100644 --- a/documentation/src/osissues.dox +++ b/documentation/src/osissues.dox @@ -857,7 +857,8 @@ the GL scene in pixels: if the Fl_Gl_Window is mapped on a retina display, these reported by Fl_Widget::w() and Fl_Widget::h(); if it's mapped on a regular display, they return the same values as w() and h(). These methods dynamically change their values if the window is moved into/out from a retina display. If Fl::use_high_res_GL(1) is not called, all Fl_Gl_Window 's are drawn at low resolution. -These methods are synonyms of w() and h() on non-Mac OS X platforms, so the source code remains cross-platform. +These methods are useful on all platforms because Fl_Gl_Window::w() and Fl_Gl_Window::h() don't return, +on HighDPI displays, the quantitites in pixels necessary to OpenGL functions . The Fl_Gl_Window::pixels_per_unit() method is useful when the OpenGL code depends on the pixel dimension of the GL scene. This occurs, e.g., if a window's handle() method uses Fl::event_x() and Fl::event_y() |