al_set_new_display_flags(3)al_set_new_display_flags(3)NAMEal_set_new_display_flags - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
void al_set_new_display_flags(int flags)
DESCRIPTION
Sets various flags to be used when creating new displays on the calling
thread. flags is a bitfield containing any reasonable combination of
the following:
ALLEGRO_WINDOWED
Prefer a windowed mode.
Under multi-head X (not XRandR/TwinView), the use of more than
one adapter is impossible due to bugs in X and GLX. al_cre‐
ate_display(3) will fail if more than one adapter is attempted
to be used.
ALLEGRO_FULLSCREEN
Prefer a fullscreen mode.
Under X the use of more than one FULLSCREEN display when using
multi-head X, or true Xinerama is not possible due to bugs in X
and GLX, display creation will fail if more than one adapter is
attempted to be used.
ALLEGRO_FULLSCREEN_WINDOW
Make the window span the entire screen. Unlike ALLE‐
GRO_FULLSCREEN this will never attempt to modify the screen res‐
olution. Instead the pixel dimensions of the created display
will be the same as the desktop.
The passed width and height are only used if the window is
switched out of fullscreen mode later but will be ignored ini‐
tially.
Under Windows and X11 a fullscreen display created with this
flag will behave differently from one created with the ALLE‐
GRO_FULLSCREEN flag - even if the ALLEGRO_FULLSCREEN display is
passed the desktop dimensions. The exact difference is platform
dependent, but some things which may be different is how alt-tab
works, how fast you can toggle between fullscreen/windowed mode
or how additional monitors behave while your display is in
fullscreen mode.
Additionally under X, the use of more than one adapter in
multi-head mode or with true Xinerama enabled is impossible due
to bugs in X/GLX, creation will fail if more than one adapter is
attempted to be used.
ALLEGRO_RESIZABLE
The display is resizable (only applicable if combined with ALLE‐
GRO_WINDOWED).
ALLEGRO_OPENGL
Require the driver to provide an initialized OpenGL context
after returning successfully.
ALLEGRO_OPENGL_3_0
Require the driver to provide an initialized OpenGL context com‐
patible with OpenGL version 3.0.
ALLEGRO_OPENGL_FORWARD_COMPATIBLE
If this flag is set, the OpenGL context created with ALLE‐
GRO_OPENGL_3_0 will be forward compatible only, meaning that all
of the OpenGL API declared deprecated in OpenGL 3.0 will not be
supported. Currently, a display created with this flag will not
be compatible with Allegro drawing routines; the display option
ALLEGRO_COMPATIBLE_DISPLAY will be set to false.
ALLEGRO_DIRECT3D
Require the driver to do rendering with Direct3D and provide a
Direct3D device.
ALLEGRO_FRAMELESS
Try to create a window without a frame (i.e. no border or
titlebar). This usually does nothing for fullscreen modes, and
even in windowed modes it depends on the underlying platform
whether it is supported or not. Since: 5.0.7, 5.1.2
ALLEGRO_NOFRAME
Original name for ALLEGRO_FRAMELESS. This works with older ver‐
sions of Allegro.
ALLEGRO_GENERATE_EXPOSE_EVENTS
Let the display generate expose events.
0 can be used for default values.
SEE ALSOal_set_new_display_option(3), al_get_display_option(3), al_change_dis‐
play_option(3)Allegro reference manualal_set_new_display_flags(3)
