get_gfx_mode_type(3) Allegro manual get_gfx_mode_type(3)NAMEget_gfx_mode_type - Retrieves type information for a specific graphics
card. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int get_gfx_mode_type(int graphics_card);
DESCRIPTION
This function lets you determine the types of operating modes that a
specific graphics card driver operates in. It will tell you whether it
is a windowed, fullscreen, definitely windowed or fullscreen, and/or a
magic driver.
The value returned is a bitfield consisting of these fields:
GFX_TYPE_UNKNOWN GFX_TYPE_WINDOWED GFX_TYPE_FULLSCREEN GFX_TYPE_DEFI‐
NITE GFX_TYPE_MAGIC
The return value will only be equivalent to GFX_TYPE_UNKNOWN when it is
a driver unrecognized on that platform, or it is a bogus value. Test
for the other types by using a bitwise AND. If the driver is windowed
or fullscreen, it will also have the definite flag set. For example,
int gfx_type = get_gfx_mode_type(GFX_AUTODETECT_WINDOWED);
gfx_type would have the GFX_TYPE_WINDOWED, GFX_TYPE_DEFINITE, and
GFX_TYPE_MAGIC flags set.
Allegro needs to be initialized first.
Example:
/* Accept the use of only windowed drivers in our selection dialog */
int accept_windowed(int card , int w , int h , int color_depth)
{
if (get_gfx_mode_type(card) & GFX_TYPE_WINDOWED)
return 0;
return 1;
}
/* In main: */
gfx_mode_select_filter(&card, &w, &h, &color_depth, accept_windowed);
RETURN VALUE
Returns a bitfield describing the graphics mode type.
SEE ALSOgfx_mode_select_filter(3), get_gfx_mode(3), set_gfx_mode(3), is_win‐
dowed_mode(3)Allegro version 4.4.2 get_gfx_mode_type(3)
