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cosmopolitan/tool/viz/printansi.c
Justine Tunney 6f7d0cb1c3
Pay off more technical debt 
This makes breaking changes to add underscores to many non-standard
function names provided by the c library. MODE=tiny is now tinier and
we now use smaller locks that are better for tiny apps in this mode.
Some headers have been renamed to be in the same folder as the build
package, so it'll be easier to know which build dependency is needed.
Certain old misguided interfaces have been removed. Intel intrinsics
headers are now listed in libc/isystem (but not in the amalgamation)
to help further improve open source compatibility. Header complexity
has also been reduced. Lastly, more shell scripts are now available.
2022-09-12 23:36:56 -07:00

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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "dsp/core/half.h"
#include "dsp/core/twixt8.h"
#include "dsp/scale/scale.h"
#include "dsp/tty/quant.h"
#include "dsp/tty/tty.h"
#include "libc/assert.h"
#include "libc/intrin/bits.h"
#include "libc/intrin/safemacros.internal.h"
#include "libc/calls/calls.h"
#include "libc/calls/ioctl.h"
#include "libc/calls/struct/stat.h"
#include "libc/calls/struct/winsize.h"
#include "libc/dce.h"
#include "libc/fmt/conv.h"
#include "libc/limits.h"
#include "libc/log/check.h"
#include "libc/log/log.h"
#include "libc/macros.internal.h"
#include "libc/math.h"
#include "libc/mem/mem.h"
#include "libc/stdio/rand.h"
#include "libc/mem/gc.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/ex.h"
#include "libc/sysv/consts/exit.h"
#include "libc/sysv/consts/fileno.h"
#include "libc/sysv/consts/madv.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/consts/termios.h"
#include "libc/x/x.h"
#include "third_party/getopt/getopt.h"
#include "third_party/stb/stb_image.h"
#include "tool/viz/lib/graphic.h"
#define SQR(x) ((x) * (x))
static struct Flags {
const char *out;
bool invert;
bool subpixel;
bool unsharp;
bool dither;
bool ruler;
bool trailingnewline;
long half;
bool full;
long width;
long height;
enum TtyBlocksSelection blocks;
enum TtyQuantizationAlgorithm quant;
} g_flags;
static wontreturn void PrintUsage(int rc, FILE *f) {
fprintf(f, "Usage: %s%s", program_invocation_name, "\
[FLAGS] [PATH]\n\
\n\
FLAGS\n\
\n\
-w INT width\n\
-h INT height\n\
-i invert\n\
-? shows this information\n\
\n\
EXAMPLES\n\
\n\
printansi.com -w80 -h40 logo.png\n\
\n\
\n");
exit(rc);
}
static int ParseNumberOption(const char *arg) {
long x;
x = strtol(arg, NULL, 0);
if (!(1 <= x && x <= INT_MAX)) {
fprintf(stderr, "invalid flexidecimal: %s\n\n", arg);
exit(EXIT_FAILURE);
}
return x;
}
static void GetOpts(int *argc, char *argv[]) {
int opt;
struct winsize ws;
g_flags.quant = kTtyQuantTrue;
g_flags.blocks = IsWindows() ? kTtyBlocksCp437 : kTtyBlocksUnicode;
if (*argc == 2 &&
(strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-help") == 0)) {
PrintUsage(EXIT_SUCCESS, stdout);
}
while ((opt = getopt(*argc, argv, "?ivpfrtxads234o:w:h:")) != -1) {
switch (opt) {
case 'o':
g_flags.out = optarg;
break;
case 'd':
g_flags.dither = true;
break;
case 's':
g_flags.unsharp = true;
break;
case 'w':
g_flags.trailingnewline = true;
g_flags.width = ParseNumberOption(optarg);
break;
case 'h':
g_flags.trailingnewline = true;
g_flags.height = ParseNumberOption(optarg);
break;
case 'f':
g_flags.full = true;
break;
case 'i':
g_flags.invert = true;
break;
case '2':
g_flags.half = true;
break;
case 'r':
g_flags.ruler = true;
break;
case 'p':
g_flags.subpixel = true;
break;
case 'a':
g_flags.quant = kTtyQuantAnsi;
break;
case 'x':
g_flags.quant = kTtyQuantXterm256;
break;
case 't':
g_flags.quant = kTtyQuantTrue;
break;
case '3':
g_flags.blocks = kTtyBlocksCp437;
break;
case '4':
g_flags.blocks = kTtyBlocksUnicode;
break;
case 'v':
++__log_level;
break;
case '?':
PrintUsage(EXIT_SUCCESS, stdout);
default:
PrintUsage(EX_USAGE, stderr);
}
}
if (optind == *argc) {
if (!g_flags.out) g_flags.out = "-";
argv[(*argc)++] = "-";
}
if (!g_flags.full && (!g_flags.width || !g_flags.width)) {
ws.ws_col = 80;
ws.ws_row = 24;
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) != -1 ||
ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1) {
g_flags.width = ws.ws_col * (1 + !g_flags.half);
g_flags.height = ws.ws_row * 2;
}
}
ttyquantsetup(g_flags.quant, kTtyQuantRgb, g_flags.blocks);
}
static unsigned char AlphaBackground(unsigned y, unsigned x) {
return 255;
}
static void *Deblinterlace(long dyn, long dxn, unsigned char dst[3][dyn][dxn],
long syn, long sxn, long scn,
const unsigned char src[syn][sxn][scn], long y0,
long yn, long x0, long xn) {
long y, x;
unsigned char c;
for (y = y0; y < yn; ++y) {
for (x = x0; x < xn; ++x) {
switch (scn) {
case 1:
c = src[y][x][0];
dst[0][y][x] = c;
dst[1][y][x] = c;
dst[2][y][x] = c;
break;
case 2:
c = twixt8(AlphaBackground(y, x), src[y][x][0], src[y][x][1]);
dst[0][y][x] = c;
dst[1][y][x] = c;
dst[2][y][x] = c;
break;
case 3:
dst[0][y][x] = src[y][x][0];
dst[1][y][x] = src[y][x][1];
dst[2][y][x] = src[y][x][2];
break;
case 4:
c = AlphaBackground(y, x);
dst[0][y][x] = twixt8(c, src[y][x][0], src[y][x][3]);
dst[1][y][x] = twixt8(c, src[y][x][1], src[y][x][3]);
dst[2][y][x] = twixt8(c, src[y][x][2], src[y][x][3]);
break;
}
}
}
return dst;
}
static void *DeblinterlaceSubpixelBgr(long dyn, long dxn,
unsigned char dst[3][dyn][dxn][3],
long syn, long sxn,
const unsigned char src[syn][sxn][4],
long y0, long yn, long x0, long xn) {
long y, x;
for (y = y0; y < yn; ++y) {
for (x = x0; x < xn; ++x) {
dst[0][y][x][0] = 0;
dst[1][y][x][0] = 0;
dst[2][y][x][0] = src[y][x][2];
dst[0][y][x][1] = 0;
dst[1][y][x][1] = src[y][x][1];
dst[2][y][x][1] = 0;
dst[0][y][x][2] = src[y][x][0];
dst[1][y][x][2] = 0;
dst[2][y][x][2] = 0;
}
}
return dst;
}
struct Block {
char16_t c;
unsigned char b[4][2];
} kBlocks[] = {
{u' ', {{0000, 0000}, {0000, 0000}, {0000, 0000}, {0000, 0000}}}, //
{u'░', {{0060, 0060}, {0060, 0060}, {0060, 0060}, {0060, 0060}}}, //
{u'▒', {{0140, 0140}, {0140, 0140}, {0140, 0140}, {0140, 0140}}}, //
{u'▓', {{0300, 0300}, {0300, 0300}, {0300, 0300}, {0300, 0300}}}, //
{u'█', {{0377, 0377}, {0377, 0377}, {0377, 0377}, {0377, 0377}}}, //
{u'▄', {{0000, 0000}, {0000, 0000}, {0377, 0377}, {0377, 0377}}}, //
{u'▌', {{0377, 0000}, {0377, 0000}, {0377, 0000}, {0377, 0000}}}, //
{u'▐', {{0000, 0377}, {0000, 0377}, {0000, 0377}, {0000, 0377}}}, //
{u'▀', {{0377, 0377}, {0377, 0377}, {0000, 0000}, {0000, 0000}}}, //
};
static void *Raster(long yn, long xn, unsigned char Y[yn][xn]) {
long y, x, i, j, k, s, bi, bs;
for (y = 0; y + 4 <= yn; y += 4) {
if (y) fputc('\n', stdout);
for (x = 0; x + 2 <= xn; x += 2) {
bi = 0;
bs = LONG_MAX;
for (k = 0; k < ARRAYLEN(kBlocks); ++k) {
s = 0;
for (i = 0; i < 4; ++i) {
for (j = 0; j < 2; ++j) {
s += SQR(Y[y + i][x + j] - kBlocks[k].b[i][j]);
}
}
if (s < bs) {
bi = k;
bs = s;
}
}
fputwc(kBlocks[bi].c, stdout);
}
}
fputc('\n', stdout);
return Y;
}
static void *Invert(long yn, long xn, unsigned char Y[yn][xn]) {
long y, x;
if (!g_flags.invert) {
for (y = 0; y < yn; ++y) {
for (x = 0; x < xn; ++x) {
Y[y][x] = 255 - Y[y][x];
}
}
}
return Y;
}
static void *Grayify(long yn, long xn, unsigned char Y[yn][xn],
const unsigned char RGB[3][yn][xn]) {
long y, x;
for (y = 0; y < yn; ++y) {
for (x = 0; x < xn; ++x) {
Y[y][x] = RGB[0][y][x] * .299 + RGB[1][y][x] * .587 + RGB[2][y][x] * .114;
}
}
return Y;
}
static void ProcessImage(long yn, long xn, unsigned char RGB[3][yn][xn]) {
Raster(yn, xn,
Invert(yn, xn, Grayify(yn, xn, gc(memalign(32, yn * xn)), RGB)));
}
void WithImageFile(const char *path,
void fn(long yn, long xn, unsigned char RGB[3][yn][xn])) {
struct stat st;
void *map, *data, *data2;
int fd, yn, xn, cn, dyn, dxn, syn, sxn;
CHECK_NE(-1, (fd = open(path, O_RDONLY)), "%s", path);
CHECK_NE(-1, fstat(fd, &st));
CHECK_GT(st.st_size, 0);
CHECK_LE(st.st_size, INT_MAX);
fadvise(fd, 0, 0, MADV_WILLNEED | MADV_SEQUENTIAL);
CHECK_NE(MAP_FAILED,
(map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0)));
CHECK_NOTNULL(
(data = gc(stbi_load_from_memory(map, st.st_size, &xn, &yn, &cn, 0))),
"%s", path);
CHECK_NE(-1, munmap(map, st.st_size));
CHECK_NE(-1, close(fd));
if (g_flags.subpixel) {
data = DeblinterlaceSubpixelBgr(yn, xn, gc(memalign(32, yn * xn * 4 * 3)),
yn, xn, data, 0, yn, 0, xn);
xn *= 3;
} else {
data = Deblinterlace(yn, xn, gc(memalign(32, yn * xn * 4)), yn, xn, cn,
data, 0, yn, 0, xn);
cn = 3;
}
if (g_flags.height && g_flags.width) {
syn = yn;
sxn = xn;
dyn = g_flags.height * 4;
dxn = g_flags.width * 2;
while (HALF(syn) > dyn || HALF(sxn) > dxn) {
if (HALF(sxn) > dxn) {
Magikarp2xX(yn, xn, data, syn, sxn);
Magikarp2xX(yn, xn, (char *)data + yn * xn, syn, sxn);
Magikarp2xX(yn, xn, (char *)data + yn * xn * 2, syn, sxn);
sxn = HALF(sxn);
}
if (HALF(syn) > dyn) {
Magikarp2xY(yn, xn, data, syn, sxn);
Magikarp2xY(yn, xn, (char *)data + yn * xn, syn, sxn);
Magikarp2xY(yn, xn, (char *)data + yn * xn * 2, syn, sxn);
syn = HALF(syn);
}
}
data = EzGyarados(3, dyn, dxn, gc(memalign(32, dyn * dxn * 3)), cn, yn, xn,
data, 0, cn, dyn, dxn, syn, sxn, 0, 0, 0, 0);
yn = dyn;
xn = dxn;
}
fn(yn, xn, data);
}
int main(int argc, char *argv[]) {
int i;
GetOpts(&argc, argv);
stbi_set_unpremultiply_on_load(true);
for (i = optind; i < argc; ++i) {
WithImageFile(argv[i], ProcessImage);
}
return 0;
}
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