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Man Pages


Manual Reference Pages  -  GET_GFX_MODE_TYPE (3)

NAME

get_gfx_mode_type - Retrieves type information for a specific graphics card. Allegro game programming library.

CONTENTS

Synopsis
Description
See Also

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_DEFINITE 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 ALSO

gfx_mode_select_filter(3), get_gfx_mode(3), set_gfx_mode(3), is_windowed_mode(3)
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Allegro GET_GFX_MODE_TYPE (3) version 4.4.2

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