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Diffstat (limited to 'documentation/src')
| -rw-r--r-- | documentation/src/wayland.dox | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/documentation/src/wayland.dox b/documentation/src/wayland.dox index 1e38611ef..c99dac9b1 100644 --- a/documentation/src/wayland.dox +++ b/documentation/src/wayland.dox @@ -451,19 +451,19 @@ displaying dragged text in a DnD operation. \section wayland-display Displays and HighDPI support -Wayland uses the concept of seat of type <tt>struct wl_seat</tt> which encompasses displays, -a keyboard, a mouse, and a trackpad. It might be possible for an app to deal with several seats, -but that has not been tested with FLTK yet. Each seat may contain one or more displays, which -Wayland calls outputs, of type <tt>struct wl_output</tt>. - -As written above, function \c registry_handle_global() discovers available seats at start-up time. -This function also associates a 'listener' to each display -by calling function \c wl_output_add_listener(). This 'listener' is an array of callback function +Wayland uses the concept of <em>seat</em> of type <tt>struct wl_seat</tt> which encompasses displays, +a keyboard, a mouse, and a trackpad. Although Wayland may be in principle able to deal with several +seats, FLTK's Wayland platform is conceived for one seat only. That seat may contain one or more +displays, which Wayland calls <em>outputs</em>, of type <tt>struct wl_output</tt>. + +As written above, function \c registry_handle_global() discovers the available seat at start-up time. +This function also associates a listener to each display connected to the system +by calling function \c wl_output_add_listener(). This listener is an array of callback function pointers among which one (\c output_mode) runs when the display is resized and another (\c output_scale) when the Wayland scale factor (see below) is changed. FLTK defines type <tt>struct Fl_Wayland_Screen_Driver::output</tt> (see \ref output) to store display size and scaling information. -One such record is created for each display. FLTK uses 2 distinct scaling parameters under Wayland: +One such record is created for each display. FLTK uses 2 distinct scaling parameters for each display: - <tt>int wld_scale;</tt>. This member variable of <tt>struct Fl_Wayland_Screen_Driver::output</tt> typically equals 1 for standard, and 2 for HighDPI displays. Its value is set by the Wayland compositor for each display with the effect |