jaseg/lolcat
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add RGB 24bits color support (default)

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Option -8bits is for 256 colors

lolcat.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)
This commit is contained in:
Remy Noulin 2020-12-12 10:07:21 -05:00 • committed by jaseg
parent 9efc71de4f
commit 36cce5225b
2 changed files with 17 additions and 4 deletions
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2
Makefile
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@ -2,7 +2,7 @@
CC ?= gcc
LOLCAT_SRC ?= lolcat.c
CENSOR_SRC ?= censor.c
CFLAGS ?= -std=c11 -Wall -Wextra -O3 -Wno-sign-compare
CFLAGS ?= -std=c11 -Wall -Wextra -O3 -Wno-sign-compare -lm
DESTDIR ?= /usr/local/bin

19
lolcat.c Normal file → Executable file
View file

@ -27,6 +27,7 @@
#include <unistd.h>
#include <wchar.h>
#include <time.h>
#include "math.h"
static char helpstr[] = "\n"
"Usage: lolcat [-h horizontal_speed] [-v vertical_speed] [--] [FILES...]\n"
@ -97,6 +98,7 @@ int main(int argc, char** argv)
int colors = isatty(STDOUT_FILENO);
int force_locale = 1;
int random = 0;
int rgb = 1;
double freq_h = 0.23, freq_v = 0.1;
struct timeval tv;
@ -127,6 +129,8 @@ int main(int argc, char** argv)
force_locale = 0;
} else if (!strcmp(argv[i], "-r")) {
random = 1;
} else if (!strcmp(argv[i], "-8bits")) {
rgb = 0;
} else if (!strcmp(argv[i], "--version")) {
version();
} else {
@ -136,6 +140,8 @@ int main(int argc, char** argv)
}
}
if (rgb)
freq_h /= 10;
int rand_offset = 0;
if (random) {
srand(time(NULL));
@ -186,9 +192,16 @@ int main(int argc, char** argv)
l++;
i = 0;
} else {
int ncc = offx * ARRAY_SIZE(codes) + (int)((i += wcwidth(c)) * freq_h + l * freq_v);
if (cc != ncc)
wprintf(L"\033[38;5;%hhum", codes[(rand_offset + (cc = ncc)) % ARRAY_SIZE(codes)]);
if (rgb) {
uint8_t red = sin(((i += wcwidth(c)) * freq_h + l * freq_v) + 0 ) * 127 + 128;
uint8_t green = sin(((i += wcwidth(c)) * freq_h + l * freq_v) + 2 * M_PI / 3 ) * 127 + 128;
uint8_t blue = sin(((i += wcwidth(c)) * freq_h + l * freq_v) + 4 * M_PI / 3 ) * 127 + 128;
wprintf(L"\033[38;2;%d;%d;%dm", red, green, blue);
} else {
int ncc = offx * ARRAY_SIZE(codes) + (int)((i += wcwidth(c)) * freq_h + l * freq_v);
if (cc != ncc)
wprintf(L"\033[38;5;%hhum", codes[(rand_offset + (cc = ncc)) % ARRAY_SIZE(codes)]);
}
}
}
}