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fade.h

// vi:ts=4:shiftwidth=4:expandtab
/* Routines to fade the first 16 palette colors to and from black,
   using the Linux console routines.  (See drivers/char/console.c, look
   for ESpalette) */

/* the default colour table, for VGA+ colour systems */
int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};

unsigned int steps=64;
/* How many steps to fade in.  Can be decreased for
             less smooth but quicker fading. */

/* Requires two args.  One is boolean (true for fade in, false for fade out),
   second is fading time in ms. A third, if provided, will be used as nubmer
   of steps.*/
#include <stdio.h>
int fadetime = 0;
int fadein();

int fadein() {
    //if (FDE == 1) {
    unsigned long restsize;
    unsigned int i;
    unsigned char j, stepsize, red, green, blue;

    stepsize=256/steps;
    restsize=1000 * fadetime/steps;
    for (i=0; i<=255; i+=stepsize) {
        printf("\e[A");
        fflush(stdout);
        for (j=0; j<=15; j++) {
            red=default_red[j]*i/256;
            green=default_grn[j]*i/256;
            blue=default_blu[j]*i/256;
            printf("\e]P%1X%02X%02X%02X",j,\
                   red, green, blue);
        }
        usleep(restsize);
        //  }
        printf("\e]R");
    }
}

int fadeout() {
    //if (FDE == 1) {
    unsigned long restsize;
    int i;
    unsigned char j, stepsize, red, green, blue;

    steps=64;
    stepsize=256/steps;
    restsize=1000 * fadetime/steps;
    for (i=256; i>=0; i-=stepsize) {
        printf("\e[A");
        fflush(stdout);
        for (j=0; j<=15; j++) {
            red=default_red[j]*i/256;
            green=default_grn[j]*i/256;
            blue=default_blu[j]*i/256;
            printf("\e]P%1X%02X%02X%02X",j,\
                   red, green, blue);
        }
        //  usleep(restsize);
    }
    //}
}

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