vgacolor.c File Reference

#include <dos.h>

Include dependency graph for vgacolor.c:

Go to the source code of this file.

Functions
void	vga_get_color (int num, int *red, int *green, int *blue)
void	vga_set_color (int num, int red, int green, int blue)
void	vga_get_cblock (char *p, int i, int n)
void	vga_set_cblock (char *p, int i, int n)
void	vga_get_cpblock (char *p)
void	vga_set_cpblock (char *p)

Function Documentation

void vga_get_cblock	(	char *	p,
		int	i,
		int	n
	)

Definition at line 46 of file vgacolor.c.

{
    int j;

    if (i+n > 256 || i < 0 || n < 0) return;
    outp(0x3c4,1);             /* sequencer clock mode */
    outp(0x3c5,0x21);          /* blank the display */
    outp(0x3c7,i);             /* write index */
    for (j = 0; j < n; j++) {
        p[j][0] = inp(0x3c9);  /* read rgb */
        p[j][1] = inp(0x3c9);
        p[j][2] = inp(0x3c9);
    }
    outp(0x3c5,0x1);           /* turn display on */
}

void vga_get_color	(	int	num,
		int *	red,
		int *	green,
		int *	blue
	)

Definition at line 16 of file vgacolor.c.

{
    if (num > 255 || num < 0) return;
    outp(0x3c7,num);                 /* write index */
    while (!(inp(0x3da) & 0x8)) ;    /* wait for V retrace */
    *red   = inp(0x3c9);             /* read rgb */
    *green = inp(0x3c9);
    *blue  = inp(0x3c9);
}

void vga_get_cpblock

(

char *

p

)

Definition at line 90 of file vgacolor.c.

{
    int j;

    while (!(inp(0x3da) & 0x8)) ;  /* wait for V retrace    */
    for (j = 0; j < 16; j++) {
        outp(0x3c0,j);             /* index, enable xfer    */
        p[j] =  inp(0x3c1);        /* read data             */
        inp(0x3da);                /* reset to address mode */
        outp(0x3c0,j | 0x20);      /* index, enable EGA     */
        inp(0x3da);                /* reset to address mode */
    }
}

void vga_set_cblock	(	char *	p,
		int	i,
		int	n
	)

Definition at line 68 of file vgacolor.c.

{
    int j;

    if (i+n > 256 || i < 0 || n < 0) return;
    outp(0x3c4,1);             /* sequencer clock mode */
    outp(0x3c5,0x21);          /* blank the display */
    outp(0x3c8,i);             /* write index */
    for (j = 0; j < n; j++) {
        outp(0x3c9,p[j][0]);   /* write rgb */
        outp(0x3c9,p[j][1]);
        outp(0x3c9,p[j][2]);
    }
    outp(0x3c5,0x1);           /* turn display on */
}

void vga_set_color	(	int	num,
		int	red,
		int	green,
		int	blue
	)

Definition at line 31 of file vgacolor.c.

{
    if (num > 255 || num < 0) return;
    outp(0x3c8,num);                 /* write index */
    while (!(inp(0x3da) & 0x8)) ;    /* wait for V retrace */
    outp(0x3c9,red);                 /* write rgb */
    outp(0x3c9,green);
    outp(0x3c9,blue);
}

void vga_set_cpblock

(

char *

p

)

Definition at line 109 of file vgacolor.c.

{
    int j;
    
    while (!(inp(0x3da) & 0x8)) ;  /* wait for V retrace    */
    for (j = 0; j < 16; j++) {
        outp(0x3c0,j);             /* index, enable xfer    */
        outp(0x3c0,p[j]);          /* write data            */
        inp(0x3da);                /* reset to address mode */
        outp(0x3c0,j | 0x20);      /* index, enable EGA     */
        inp(0x3da);                /* reset to address mode */
    }
}