dwm-flexipatch/patch/bar_vtcolors.c

70 lines
1.5 KiB
C

void
get_vt_colors(void)
{
char *cfs[3] = {
"/sys/module/vt/parameters/default_red",
"/sys/module/vt/parameters/default_grn",
"/sys/module/vt/parameters/default_blu",
};
char vtcs[16][8];
char tk[] = ",";
char cl[64];
char *tp = NULL;
FILE *fp;
size_t r;
int i, c, n;
for (i = 0; i < 16; i++)
strcpy(vtcs[i], "#000000");
for (i = 0, r = 0; i < 3; i++) {
if ((fp = fopen(cfs[i], "r")) == NULL)
continue;
while ((cl[r] = fgetc(fp)) != EOF && cl[r] != '\n')
r++;
cl[r] = '\0';
for (c = 0, tp = cl, n = 0; c < 16; c++, tp++) {
if ((r = strcspn(tp, tk)) == -1)
break;
for (n = 0; r && *tp >= 48 && *tp < 58; r--, tp++)
n = n * 10 - 48 + *tp;
vtcs[c][i * 2 + 1] = n / 16 < 10 ? n / 16 + 48 : n / 16 + 87;
vtcs[c][i * 2 + 2] = n % 16 < 10 ? n % 16 + 48 : n % 16 + 87;
}
fclose(fp);
}
for (i = 0; i < LENGTH(colors); i++) {
#if FLOAT_BORDER_COLOR_PATCH
for (c = 0; c < 4; c++)
#else
for (c = 0; c < 3; c++)
#endif // FLOAT_BORDER_COLOR_PATCH
{
n = color_ptrs[i][c];
if (n > -1 && strlen(colors[i][c]) >= strlen(vtcs[n]))
memcpy(colors[i][c], vtcs[n], 7);
}
}
}
int get_luminance(char *r)
{
char *c = r;
int n[3] = {0};
int i = 0;
while (*c) {
if (*c >= 48 && *c < 58)
n[i / 2] = n[i / 2] * 16 - 48 + *c;
else if (*c >= 65 && *c < 71)
n[i / 2] = n[i / 2] * 16 - 55 + *c;
else if (*c >= 97 && *c < 103)
n[i / 2] = n[i / 2] * 16 - 87 + *c;
else
i--;
i++;
c++;
}
return (0.299 * n[0] + 0.587 * n[1] + 0.114 * n[2]) / 2.55;
}