dwm/patch/bar_vtcolors.c
bakkeby 6b9c484b78 Refactoring and simplifying color configuration in config.h
This involves always having configuration for floating border, regardless of
whether it is used or not. Also permanently dropping the const expectation
for color configuration in dwm, so that vtcolors and xrdb patches can change
color configuration.
2020-08-20 17:42:30 +02:00

68 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, len;
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);
}
len = LENGTH(colors);
if (len > LENGTH(color_ptrs))
len = LENGTH(color_ptrs);
for (i = 0; i < len; i++) {
for (c = 0; c < ColCount; c++) {
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;
}