Gets graphics video configuration information.
#include <graph.h>
struct _videoconfig __far * __far _getvideoconfig( struct _videoconfig
__far *config );
| config | Configuration information |
The _getvideoconfig function returns the current graphics environment configuration in a _videoconfig structure, defined in GRAPH.H.
The values returned reflect the currently active video adapter and monitor, as well as the current video mode.
The _videoconfig structure contains the following members, each of which is of type short:
| Member | Contents |
| numxpixels | Number of pixels on the x axis |
| numypixels | Number of pixels on the y axis |
| numtextcols | Number of text columns available |
| numtextrows | Number of text rows available |
| numcolors | Number of color indices |
| bitsperpixel | Number of bits per pixel |
| numvideopages | Number of available video pages |
| adapter | Active display adapter |
| mode | Current video mode |
| monitor | Active display monitor |
| memory | Adapter video memory in kilobytes |
The values for the adapter member of the _videoconfig structure are given by the manifest constants shown in the list below. For any applicable adapter (_CGA, _EGA, or _VGA), the corresponding Olivetti adapter (_OCGA, _OEGA, or _OVGA) represents a superset of graphics capabilities.
| Adapter Constant | Meaning |
| _CGA | Color Graphics Adapter |
| _EGA | Enhanced Graphics Adapter |
| _HGC | Hercules Graphics Card |
| _MCGA | Multicolor Graphics Array |
| _MDPA | Monochrome Display Printer Adapter |
| _OCGA | Olivetti (AT&T) Color Graphics Adapter |
| _OEGA | Olivetti (AT&T) Enhanced Graphics Adapter |
| _OVGA | Olivetti (AT&T) Video Graphics Array |
| _VGA | Video Graphics Array |
| _SVGA | Super Video Graphics Array (VESA) |
The values for the monitor member of the _videoconfig structure are given by the manifest constants listed below:
| Monitor Constant | Meaning |
| _ANALOG | Analog monochrome and color |
| _ANALOGCOLOR | Analog color only |
| _ANALOGMONO | Analog monochrome only |
| _COLOR | Color (or enhanced monitor emulating a color monitor) |
| _ENHCOLOR | Enhanced color |
| _MONO | Monochrome monitor |
In every text mode, including monochrome, the _getvideoconfig function returns the value 32 for the number of available colors. The value 32 indicates the range of values (0–31) accepted by the _settextcolor function. This includes 16 normal colors (0–15) and 16 blinking colors (16–31). Blinking is selected by adding 16 to the normal color index. Because monochrome text mode has fewer unique display attributes, some color indices are redundant. However, because blinking is selected in the same manner, monochrome text mode has the same range (0–31) as other text modes.
The _getvideoconfig function returns the video configuration information in a structure, as noted above. There is no error return.
Standards:None
16-Bit:DOS
32-Bit:None
_setvideomode, _setvideomoderows
/* GVIDCFG.C: This program displays information about the current
* video configuration.
*/
#include <stdio.h>
#include <graph.h>
void main( void )
{
struct _videoconfig vc;
short c;
char b[500]; /* Buffer for string */
_getvideoconfig( &vc );
/* Write all information to a string, then output string. */
c = sprintf( b, "X pixels: %d\n", vc.numxpixels );
c += sprintf( b + c, "Y pixels: %d\n", vc.numypixels );
c += sprintf( b + c, "Text columns: %d\n", vc.numtextcols );
c += sprintf( b + c, "Text rows: %d\n", vc.numtextrows );
c += sprintf( b + c, "Colors: %d\n", vc.numcolors );
c += sprintf( b + c, "Bits/pixel: %d\n", vc.bitsperpixel );
c += sprintf( b + c, "Video pages: %d\n", vc.numvideopages );
c += sprintf( b + c, "Mode: %d\n", vc.mode );
c += sprintf( b + c, "Adapter: %d\n", vc.adapter );
c += sprintf( b + c, "Monitor: %d\n", vc.monitor );
c += sprintf( b + c, "Memory: %d\n", vc.memory );
_outtext( b );
}
X pixels: 0
Y pixels: 0
Text columns: 80
Text rows: 25
Colors: 32
Bits/pixel: 0
Video pages: 1
Mode: 3
Adapter: 8
Monitor: 24
Memory: 256