Category : C Source Code
Archive   : IMDSRC78.ZIP
Filename : DISPIO.H

/**** DISPIO.H

Header file for DISPIO.H
Built by A. Warnock, ST Systems Corp., NASA/GSFC 5/90

****/

/* * * * Defined Constants * * * */

/* * * * External Function Prototypes * * * */

extern int DisplayOn (void);
extern int DisplayOff (void);
extern int WritePixel (int, int, int);
extern int ReadPixel (int, int, int *);
extern int DisplayLine (unsigned char *,int ,int ,int );
extern int GetLine (unsigned char *,int ,int ,int );
extern int FormatLine (unsigned char *buffer, int nsdd, int nsd, int bitshift, int NoScale, char status[]);
extern int ClearDisplay (int );
extern int Which_Tseng(void);

/* * * * External Global Variables * * * */

extern int atibank;
extern int LastPage;
extern char specname[8];
extern int dispnl, dispns, numDN, numshades, OneScreen;
extern int tseng;

/* DisplayDevice indicates the type of display (CGA=0, EGA=1, PGA=2).
dispnl is the number of lines in the display.
dispns is the number of samples in the display.
numDN is the number of unique pixel values (e.g. 4 bits ->
numDN=16).
numshades is the number of shades each of red, green, and blue
(e.g. numshades=16 gives 16**3 = 4096 possible colors).
OneScreen is true if there is only one screen, i.e. there is not
image screen and a text screen.
*/

extern Color DefaultPalette[256], PaletteTable[256];

extern enum Display
{ DISPLAY_MIN = -1, CGA200, EGA350, PGA, VGA480, VGA200, BIOS,
ORCHID480, ORCHID600, EVGA640, EVGA512, EVGA800, EGA480,
ATI640, ATI800, ATI1024, PARADISE, ORCHID768, TRIDENT, VESA,
VESA800, VESA640, EV629, TEST, DISPLAY_MAX };

extern enum Display DisplayDevice;