jaseg/lolcat
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Add new option --invert.

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Nor Khasyatillah 2022-05-27 16:56:07 +07:00 • committed by jaseg
parent 37bb84e297
commit 6db5a0fa50
1 changed files with 18 additions and 3 deletions
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21
lolcat.c
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@ -46,6 +46,7 @@ static char helpstr[] = "\n"
" --24bit, -b: Output in 24-bit \"true\" RGB mode (slower and\n"
" not supported by all terminals)\n"
" --16color, -x: Output in 16-color mode for basic terminals\n"
" --invert, -i: Invert foreground and background\n"
" --version: Print version and exit\n"
" --help: Show this message\n"
"\n"
@ -109,6 +110,7 @@ int main(int argc, char** argv)
int start_color = 0;
int rgb = 0;
int ansi16 = 0;
int invert = 0;
double freq_h = 0.23, freq_v = 0.1;
struct timeval tv;
@ -160,6 +162,8 @@ int main(int argc, char** argv)
rgb = 1;
} else if (!strcmp(argv[i], "-x") || !strcmp(argv[i], "--16color")) {
ansi16 = 1;
} else if (!strcmp(argv[i], "-i") || !strcmp(argv[i], "--invert")) {
invert = 1;
} else if (!strcmp(argv[i], "--version")) {
version();
} else {
@ -174,6 +178,14 @@ int main(int argc, char** argv)
usage();
}
if (invert) {
if (ansi16) {
wprintf(L"\033[30m\n");
} else {
wprintf(L"\033[38;5;16m\n");
}
}
int rand_offset = 0;
if (random) {
srand(seed);
@ -227,6 +239,9 @@ int main(int argc, char** argv)
if (c == '\n') {
l++;
i = 0;
if (invert) {
wprintf(L"\033[49m");
}
} else {
if (rgb) {
@ -237,17 +252,17 @@ int main(int argc, char** argv)
uint8_t red = lrintf((offset + (1.0f - offset) * (0.5f + 0.5f * sin(theta + 0 ))) * 255.0f);
uint8_t green = lrintf((offset + (1.0f - offset) * (0.5f + 0.5f * sin(theta + 2 * M_PI / 3 ))) * 255.0f);
uint8_t blue = lrintf((offset + (1.0f - offset) * (0.5f + 0.5f * sin(theta + 4 * M_PI / 3 ))) * 255.0f);
wprintf(L"\033[38;2;%d;%d;%dm", red, green, blue);
wprintf(L"\033[%d;2;%d;%d;%dm", (invert ? 48 : 38), red, green, blue);
} else if (ansi16) {
int ncc = offx * ARRAY_SIZE(codes16) + (int)((i += wcwidth(c)) * freq_h + l * freq_v);
if (cc != ncc)
wprintf(L"\033[%hhum", codes16[(rand_offset + start_color + (cc = ncc)) % ARRAY_SIZE(codes16)]);
wprintf(L"\033[%hhum", (invert ? 10 : 0) + codes16[(rand_offset + start_color + (cc = ncc)) % ARRAY_SIZE(codes16)]);
} 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 + start_color + (cc = ncc)) % ARRAY_SIZE(codes)]);
wprintf(L"\033[%d;5;%hhum", (invert ? 48 : 38), codes[(rand_offset + start_color + (cc = ncc)) % ARRAY_SIZE(codes)]);
}
}
}