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cosmopolitan/dsp/tty/ttyraster.c
Justine Tunney 791f79fcb3
Make improvements 
- We now serialize the file descriptor table when spawning / executing
  processes on Windows. This means you can now inherit more stuff than
  just standard i/o. It's needed by bash, which duplicates the console
  to file descriptor #255. We also now do a better job serializing the
  environment variables, so you're less likely to encounter E2BIG when
  using your bash shell. We also no longer coerce environ to uppercase

- execve() on Windows now remotely controls its parent process to make
  them spawn a replacement for itself. Then it'll be able to terminate
  immediately once the spawn succeeds, without having to linger around
  for the lifetime as a shell process for proxying the exit code. When
  process worker thread running in the parent sees the child die, it's
  given a handle to the new child, to replace it in the process table.

- execve() and posix_spawn() on Windows will now provide CreateProcess
  an explicit handle list. This allows us to remove handle locks which
  enables better fork/spawn concurrency, with seriously correct thread
  safety. Other codebases like Go use the same technique. On the other
  hand fork() still favors the conventional WIN32 inheritence approach
  which can be a little bit messy, but is *controlled* by guaranteeing
  perfectly clean slates at both the spawning and execution boundaries

- sigset_t is now 64 bits. Having it be 128 bits was a mistake because
  there's no reason to use that and it's only supported by FreeBSD. By
  using the system word size, signal mask manipulation on Windows goes
  very fast. Furthermore @asyncsignalsafe funcs have been rewritten on
  Windows to take advantage of signal masking, now that it's much more
  pleasant to use.

- All the overlapped i/o code on Windows has been rewritten for pretty
  good signal and cancelation safety. We're now able to ensure overlap
  data structures are cleaned up so long as you don't longjmp() out of
  out of a signal handler that interrupted an i/o operation. Latencies
  are also improved thanks to the removal of lots of "busy wait" code.
  Waits should be optimal for everything except poll(), which shall be
  the last and final demon we slay in the win32 i/o horror show.

- getrusage() on Windows is now able to report RUSAGE_CHILDREN as well
  as RUSAGE_SELF, thanks to aggregation in the process manager thread.
2023-10-08 08:59:53 -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/twixt8.h"
#include "dsp/tty/quant.h"
#include "dsp/tty/tty.h"
#include "dsp/tty/ttyrgb.h"
#include "dsp/tty/windex.h"
#include "libc/assert.h"
#include "libc/intrin/bits.h"
#include "libc/intrin/safemacros.internal.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/nexgen32e/x86feature.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#define SQR(X) ((X) * (X))
#define DIST(X, Y) ((X) - (Y))
#define QSUB(A, B, C) ABS(DIST(A##C, B##C))
#define DIFF(A, B) (QSUB(A, B, r) + QSUB(A, B, g) + QSUB(A, B, b))
#define JUDGE(M) (DIFF(ttl, M) + DIFF(ttr, M) + DIFF(tbl, M) + DIFF(tbr, M))
static const struct Glyph {
char c1, c2, c3, len;
} kGlyphs[2][11] = {
{{0x20, 0x00, 0x00, 1}, /* */
{0xE2, 0x96, 0x84, 3}, /* ▄ */
{0xE2, 0x96, 0x8C, 3}, /* ▌ */
{0xE2, 0x96, 0x9D, 3}, /* ▝ */
{0xE2, 0x96, 0x97, 3}, /* ▗ */
{0xE2, 0x96, 0x96, 3}, /* ▖ */
{0xE2, 0x96, 0x9E, 3}, /* ▞ */
{0xE2, 0x96, 0x98, 3}, /* ▘ */
{0xE2, 0x96, 0x91, 3}, /* ░ */
{0xE2, 0x96, 0x93, 3}, /* ▓ */
{0xE2, 0x96, 0x92, 3}}, /* ▒ */
{{0xE2, 0x96, 0x88, 3}, /* █ */
{0xE2, 0x96, 0x80, 3}, /* ▀ */
{0xE2, 0x96, 0x90, 3}, /* ▐ */
{0xE2, 0x96, 0x99, 3}, /* ▙ */
{0xE2, 0x96, 0x9B, 3}, /* ▛ */
{0xE2, 0x96, 0x9C, 3}, /* ▜ */
{0xE2, 0x96, 0x9A, 3}, /* ▚ */
{0xE2, 0x96, 0x9F, 3}, /* ▟ */
{0xE2, 0x96, 0x93, 3}, /* ▓ */
{0xE2, 0x96, 0x91, 3}, /* ░ */
{0xE2, 0x96, 0x92, 3}}, /* ▒ */
};
static const struct Pick {
unsigned char fg, bg, k;
} kPicksUnicode[96] = {
{-1, BL, 0}, /* */
{BR, BL, 4}, /* ▗ */
{TL, BL, 4}, /* ▗ */
{TR, BL, 4}, /* ▗ */
{BR, BL, 5}, /* ▖ */
{BR, BL, 1}, /* ▄ */
{TL, BL, 5}, /* ▖ */
{TL, BL, 1}, /* ▄ */
{TR, BL, 5}, /* ▖ */
{TR, BL, 1}, /* ▄ */
{BR, BL, 3}, /* ▝ */
{BL, BR, 2}, /* ▌ */
{BR, BL, 6}, /* ▞ */
{BL, BR, 7}, /* ▘ */
{TL, BL, 3}, /* ▝ */
{BL, TL, 2}, /* ▌ */
{TL, BL, 6}, /* ▞ */
{BL, TL, 7}, /* ▘ */
{TR, BL, 3}, /* ▝ */
{BL, TR, 2}, /* ▌ */
{TR, BL, 6}, /* ▞ */
{BL, TR, 7}, /* ▘ */
{BR, BL, 7}, /* ▘ */
{BL, BR, 6}, /* ▞ */
{BR, BL, 2}, /* ▌ */
{BL, BR, 3}, /* ▝ */
{BL, BR, 1}, /* ▄ */
{BL, BR, 5}, /* ▖ */
{BL, BR, 4}, /* ▗ */
{-1, BR, 0}, /* */
{TL, BR, 4}, /* ▗ */
{TR, BR, 4}, /* ▗ */
{TL, BR, 5}, /* ▖ */
{TL, BR, 1}, /* ▄ */
{TR, BR, 5}, /* ▖ */
{TR, BR, 1}, /* ▄ */
{TL, BR, 3}, /* ▝ */
{BR, TL, 2}, /* ▌ */
{TL, BR, 6}, /* ▞ */
{BR, TL, 7}, /* ▘ */
{TR, BR, 3}, /* ▝ */
{BR, TR, 2}, /* ▌ */
{TR, BR, 6}, /* ▞ */
{BR, TR, 7}, /* ▘ */
{TL, BL, 7}, /* ▘ */
{BL, TL, 6}, /* ▞ */
{TL, BL, 2}, /* ▌ */
{BL, TL, 3}, /* ▝ */
{TL, BR, 7}, /* ▘ */
{BR, TL, 6}, /* ▞ */
{TL, BR, 2}, /* ▌ */
{BR, TL, 3}, /* ▝ */
{BL, TL, 1}, /* ▄ */
{BL, TL, 5}, /* ▖ */
{BR, TL, 1}, /* ▄ */
{BR, TL, 5}, /* ▖ */
{BL, TL, 4}, /* ▗ */
{BR, TL, 4}, /* ▗ */
{-1, TL, 0}, /* */
{TR, TL, 4}, /* ▗ */
{TR, TL, 5}, /* ▖ */
{TR, TL, 1}, /* ▄ */
{TR, TL, 3}, /* ▝ */
{TL, TR, 2}, /* ▌ */
{TR, TL, 6}, /* ▞ */
{TL, TR, 7}, /* ▘ */
{TR, BL, 7}, /* ▘ */
{BL, TR, 6}, /* ▞ */
{TR, BL, 2}, /* ▌ */
{BL, TR, 3}, /* ▝ */
{TR, BR, 7}, /* ▘ */
{BR, TR, 6}, /* ▞ */
{TR, BR, 2}, /* ▌ */
{BR, TR, 3}, /* ▝ */
{TR, TL, 7}, /* ▘ */
{TL, TR, 6}, /* ▞ */
{TR, TL, 2}, /* ▌ */
{TL, TR, 3}, /* ▝ */
{BL, TR, 1}, /* ▄ */
{BL, TR, 5}, /* ▖ */
{BR, TR, 1}, /* ▄ */
{BR, TR, 5}, /* ▖ */
{TL, TR, 1}, /* ▄ */
{TL, TR, 5}, /* ▖ */
{BL, TR, 4}, /* ▗ */
{BR, TR, 4}, /* ▗ */
{TL, TR, 4}, /* ▗ */
{-1, TR, 0}, /* */
{-1, -1, -1}, /* X */
{-1, -1, -1}, /* X */
{-1, -1, -1}, /* X */
{-1, -1, -1}, /* X */
{-1, -1, -1}, /* X */
{-1, -1, -1}, /* X */
{-1, -1, -1}, /* X */
{-1, -1, -1}, /* X */
};
static const struct Pick kPicksCp437[32] = {
{-1, BL, 0}, /* */
{BR, BL, 1}, /* ▄ */
{TL, BL, 1}, /* ▄ */
{TR, BL, 1}, /* ▄ */
{BL, BR, 1}, /* ▄ */
{BL, TL, 1}, /* ▄ */
{BL, TR, 1}, /* ▄ */
{BL, BR, 2}, /* ▌ */
{BL, TL, 2}, /* ▌ */
{BL, TR, 2}, /* ▌ */
{BR, BL, 2}, /* ▌ */
{-1, BR, 0}, /* */
{TL, BR, 1}, /* ▄ */
{TR, BR, 1}, /* ▄ */
{BR, TL, 2}, /* ▌ */
{BR, TR, 2}, /* ▌ */
{TL, BL, 2}, /* ▌ */
{TL, BR, 2}, /* ▌ */
{BR, TL, 1}, /* ▄ */
{-1, TL, 0}, /* */
{TR, TL, 1}, /* ▄ */
{TL, TR, 2}, /* ▌ */
{TR, BL, 2}, /* ▌ */
{TR, BR, 2}, /* ▌ */
{TR, TL, 2}, /* ▌ */
{BR, TR, 1}, /* ▄ */
{TL, TR, 1}, /* ▄ */
{-1, TR, 0}, /* */
{-1, -1, -1}, /* X */
{-1, -1, -1}, /* X */
{-1, -1, -1}, /* X */
{-1, -1, -1}, /* X */
};
static const struct Pick kPicksMixBlock[32] = {
{BR, BL, 8}, /* ░ */
{BR, BL, 9}, /* ▓ */
{TL, BL, 8}, /* ░ */
{TL, BL, 9}, /* ▓ */
{TR, BL, 8}, /* ░ */
{TR, BL, 9}, /* ▓ */
{TL, BR, 8}, /* ░ */
{TL, BR, 9}, /* ▓ */
{TR, BR, 8}, /* ░ */
{TR, BR, 9}, /* ▓ */
{BL, TL, 8}, /* ░ */
{BL, TL, 9}, /* ▓ */
{BL, TL, 8}, /* ░ */
{BL, TL, 9}, /* ▓ */
{TR, TL, 8}, /* ░ */
{TR, TL, 9}, /* ▓ */
{BL, TR, 8}, /* ░ */
{BL, TR, 9}, /* ▓ */
{BR, TR, 8}, /* ░ */
{BR, TR, 9}, /* ▓ */
{TL, TR, 8}, /* ░ */
{TL, TR, 9}, /* ▓ */
/**/
{BL, TL, 8}, /* ░ */
{BL, TL, 9}, /* ▓ */
{TR, TL, 8}, /* ░ */
{TR, TL, 9}, /* ▓ */
{BL, TR, 8}, /* ░ */
{BL, TR, 9}, /* ▓ */
{BR, TR, 8}, /* ░ */
{BR, TR, 9}, /* ▓ */
{TL, TR, 8}, /* ░ */
{TL, TR, 9}, /* ▓ */
};
static unsigned short GetBlockDist(struct TtyRgb a, struct TtyRgb b,
struct TtyRgb c, struct TtyRgb d,
struct TtyRgb w, struct TtyRgb x,
struct TtyRgb y, struct TtyRgb z) {
unsigned short dist;
dist = 0;
dist += ABS(a.r - w.r);
dist += ABS(a.g - w.g);
dist += ABS(a.b - w.b);
dist += ABS(b.r - x.r);
dist += ABS(b.g - x.g);
dist += ABS(b.b - x.b);
dist += ABS(c.r - y.r);
dist += ABS(c.g - y.g);
dist += ABS(c.b - y.b);
dist += ABS(d.r - z.r);
dist += ABS(d.g - z.g);
dist += ABS(d.b - z.b);
return dist;
}
static uint16_t *MixBlock(uint16_t *p, struct TtyRgb ttl, struct TtyRgb ttr,
struct TtyRgb tbl, struct TtyRgb tbr,
struct TtyRgb qtl, struct TtyRgb qtr,
struct TtyRgb qbl, struct TtyRgb qbr) {
unsigned char ttlr, ttlg, ttlb, qtlr, qtlg, qtlb, ttrr, ttrg, ttrb, qtrr,
qtrg, qtrb, tblr, tblg, tblb, qblr, qblg, qblb, tbrr, tbrg, tbrb, qbrr,
qbrg, qbrb, l00r, l00g, l00b, l01r, l01g, l01b, l02r, l02g, l02b, l03r,
l03g, l03b, l04r, l04g, l04b, l05r, l05g, l05b, l06r, l06g, l06b, l07r,
l07g, l07b, l08r, l08g, l08b, l09r, l09g, l09b, l10r, l10g, l10b, l11r,
l11g, l11b, l12r, l12g, l12b, l13r, l13g, l13b, l14r, l14g, l14b, l15r,
l15g, l15b, l16r, l16g, l16b, l17r, l17g, l17b, l18r, l18g, l18b, l19r,
l19g, l19b, l20r, l20g, l20b, l21r, l21g, l21b, l22r, l22g, l22b, l23r,
l23g, l23b, l24r, l24g, l24b, l25r, l25g, l25b, l26r, l26g, l26b, l27r,
l27g, l27b, l28r, l28g, l28b, l29r, l29g, l29b, l30r, l30g, l30b, l31r,
l31g, l31b;
unsigned short p00, p01, p02, p03, p04, p05, p06, p07, p08, p09, p10, p11,
p12, p13, p14, p15, p16, p17, p18, p19, p20, p21, p22, p23, p24, p25, p26,
p27, p28, p29, p30, p31;
ttlr = ttl.r;
ttlg = ttl.g;
ttlb = ttl.b;
qtlr = qtl.r;
qtlg = qtl.g;
qtlb = qtl.b;
ttrr = ttr.r;
ttrg = ttr.g;
ttrb = ttr.b;
qtrr = qtr.r;
qtrg = qtr.g;
qtrb = qtr.b;
tblr = tbl.r;
tblg = tbl.g;
tblb = tbl.b;
qblr = qbl.r;
qblg = qbl.g;
qblb = qbl.b;
tbrr = tbr.r;
tbrg = tbr.g;
tbrb = tbr.b;
qbrr = qbr.r;
qbrg = qbr.g;
qbrb = qbr.b;
l00r = twixt8(qblr, qbrr, 0100);
l00g = twixt8(qblg, qbrg, 0100);
l00b = twixt8(qblb, qbrb, 0100);
l01r = twixt8(qblr, qbrr, 0300);
l01g = twixt8(qblg, qbrg, 0300);
l01b = twixt8(qblb, qbrb, 0300);
l02r = twixt8(qblr, qbrr, 0200);
l02g = twixt8(qblg, qbrg, 0200);
l02b = twixt8(qblb, qbrb, 0200);
l03r = twixt8(qblr, qtlr, 0100);
l03g = twixt8(qblg, qtlg, 0100);
l03b = twixt8(qblb, qtlb, 0100);
l04r = twixt8(qblr, qtlr, 0300);
l04g = twixt8(qblg, qtlg, 0300);
l04b = twixt8(qblb, qtlb, 0300);
l05r = twixt8(qblr, qtlr, 0200);
l05g = twixt8(qblg, qtlg, 0200);
l05b = twixt8(qblb, qtlb, 0200);
l06r = twixt8(qblr, qtrr, 0100);
l06g = twixt8(qblg, qtrg, 0100);
l06b = twixt8(qblb, qtrb, 0100);
l07r = twixt8(qblr, qtrr, 0300);
l07g = twixt8(qblg, qtrg, 0300);
l07b = twixt8(qblb, qtrb, 0300);
l08r = twixt8(qblr, qtrr, 0200);
l08g = twixt8(qblg, qtrg, 0200);
l08b = twixt8(qblb, qtrb, 0200);
l09r = twixt8(qbrr, qtlr, 0100);
l09g = twixt8(qbrg, qtlg, 0100);
l09b = twixt8(qbrb, qtlb, 0100);
l10r = twixt8(qbrr, qtlr, 0300);
l10g = twixt8(qbrg, qtlg, 0300);
l10b = twixt8(qbrb, qtlb, 0300);
l11r = twixt8(qbrr, qtlr, 0200);
l11g = twixt8(qbrg, qtlg, 0200);
l11b = twixt8(qbrb, qtlb, 0200);
l12r = twixt8(qbrr, qtrr, 0100);
l12g = twixt8(qbrg, qtrg, 0100);
l12b = twixt8(qbrb, qtrb, 0100);
l13r = twixt8(qbrr, qtrr, 0300);
l13g = twixt8(qbrg, qtrg, 0300);
l13b = twixt8(qbrb, qtrb, 0300);
l14r = twixt8(qbrr, qtrr, 0200);
l14g = twixt8(qbrg, qtrg, 0200);
l14b = twixt8(qbrb, qtrb, 0200);
l15r = twixt8(qtlr, qblr, 0100);
l15g = twixt8(qtlg, qblg, 0100);
l15b = twixt8(qtlb, qblb, 0100);
l16r = twixt8(qtlr, qblr, 0300);
l16g = twixt8(qtlg, qblg, 0300);
l16b = twixt8(qtlb, qblb, 0300);
l17r = twixt8(qtlr, qblr, 0200);
l17g = twixt8(qtlg, qblg, 0200);
l17b = twixt8(qtlb, qblb, 0200);
l18r = twixt8(qtlr, qbrr, 0100);
l18g = twixt8(qtlg, qbrg, 0100);
l18b = twixt8(qtlb, qbrb, 0100);
l19r = twixt8(qtlr, qbrr, 0300);
l19g = twixt8(qtlg, qbrg, 0300);
l19b = twixt8(qtlb, qbrb, 0300);
l20r = twixt8(qtlr, qbrr, 0200);
l20g = twixt8(qtlg, qbrg, 0200);
l20b = twixt8(qtlb, qbrb, 0200);
l21r = twixt8(qtlr, qtrr, 0100);
l21g = twixt8(qtlg, qtrg, 0100);
l21b = twixt8(qtlb, qtrb, 0100);
l22r = twixt8(qtlr, qtrr, 0300);
l22g = twixt8(qtlg, qtrg, 0300);
l22b = twixt8(qtlb, qtrb, 0300);
l23r = twixt8(qtlr, qtrr, 0200);
l23g = twixt8(qtlg, qtrg, 0200);
l23b = twixt8(qtlb, qtrb, 0200);
l24r = twixt8(qtrr, qblr, 0100);
l24g = twixt8(qtrg, qblg, 0100);
l24b = twixt8(qtrb, qblb, 0100);
l25r = twixt8(qtrr, qblr, 0300);
l25g = twixt8(qtrg, qblg, 0300);
l25b = twixt8(qtrb, qblb, 0300);
l26r = twixt8(qtrr, qblr, 0200);
l26g = twixt8(qtrg, qblg, 0200);
l26b = twixt8(qtrb, qblb, 0200);
l27r = twixt8(qtrr, qbrr, 0100);
l27g = twixt8(qtrg, qbrg, 0100);
l27b = twixt8(qtrb, qbrb, 0100);
l28r = twixt8(qtrr, qbrr, 0300);
l28g = twixt8(qtrg, qbrg, 0300);
l28b = twixt8(qtrb, qbrb, 0300);
l29r = twixt8(qtrr, qbrr, 0200);
l29g = twixt8(qtrg, qbrg, 0200);
l29b = twixt8(qtrb, qbrb, 0200);
l30r = twixt8(qtrr, qtlr, 0100);
l30g = twixt8(qtrg, qtlg, 0100);
l30b = twixt8(qtrb, qtlb, 0100);
l31r = twixt8(qtrr, qtlr, 0300);
l31g = twixt8(qtrg, qtlg, 0300);
l31b = twixt8(qtrb, qtlb, 0300);
p00 = JUDGE(l00);
p01 = JUDGE(l01);
p02 = JUDGE(l02);
p03 = JUDGE(l03);
p04 = JUDGE(l04);
p05 = JUDGE(l05);
p06 = JUDGE(l06);
p07 = JUDGE(l07);
p08 = JUDGE(l08);
p09 = JUDGE(l09);
p10 = JUDGE(l10);
p11 = JUDGE(l11);
p12 = JUDGE(l12);
p13 = JUDGE(l13);
p14 = JUDGE(l14);
p15 = JUDGE(l15);
p16 = JUDGE(l16);
p17 = JUDGE(l17);
p18 = JUDGE(l18);
p19 = JUDGE(l19);
p20 = JUDGE(l20);
p21 = JUDGE(l21);
p22 = JUDGE(l22);
p23 = JUDGE(l23);
p24 = JUDGE(l24);
p25 = JUDGE(l25);
p26 = JUDGE(l26);
p27 = JUDGE(l27);
p28 = JUDGE(l28);
p29 = JUDGE(l29);
p30 = JUDGE(l30);
p31 = JUDGE(l31);
*p++ = p00;
*p++ = p01;
*p++ = p02;
*p++ = p03;
*p++ = p04;
*p++ = p05;
*p++ = p06;
*p++ = p07;
*p++ = p08;
*p++ = p09;
*p++ = p10;
*p++ = p11;
*p++ = p12;
*p++ = p13;
*p++ = p14;
*p++ = p15;
*p++ = p16;
*p++ = p17;
*p++ = p18;
*p++ = p19;
*p++ = p20;
*p++ = p21;
*p++ = p22;
*p++ = p23;
*p++ = p24;
*p++ = p25;
*p++ = p26;
*p++ = p27;
*p++ = p28;
*p++ = p29;
*p++ = p30;
*p++ = p31;
return p;
}
static struct TtyRgb GetQuant(struct TtyRgb rgb) {
return g_ansi2rgb_[rgb.xt];
}
static uint16_t *PickUnicode(uint16_t *p, struct TtyRgb tl, struct TtyRgb tr,
struct TtyRgb bl, struct TtyRgb br,
struct TtyRgb tl2, struct TtyRgb tr2,
struct TtyRgb bl2, struct TtyRgb br2) {
#define PICK(A, B, C, D) *p++ = GetBlockDist(tl, tr, bl, br, A, B, C, D)
PICK(bl2, bl2, bl2, bl2); /* k=0 bg=bl fg=NULL */
PICK(bl2, bl2, bl2, br2); /* ▗ k=4 bg=bl fg=br */
PICK(bl2, bl2, bl2, tl2); /* ▗ k=4 bg=bl fg=tl */
PICK(bl2, bl2, bl2, tr2); /* ▗ k=4 bg=bl fg=tr */
PICK(bl2, bl2, br2, bl2); /* ▖ k=5 bg=bl fg=br */
PICK(bl2, bl2, br2, br2); /* ▄ k=1 bg=bl fg=br */
PICK(bl2, bl2, tl2, bl2); /* ▖ k=5 bg=bl fg=tl */
PICK(bl2, bl2, tl2, tl2); /* ▄ k=1 bg=bl fg=tl */
PICK(bl2, bl2, tr2, bl2); /* ▖ k=5 bg=bl fg=tr */
PICK(bl2, bl2, tr2, tr2); /* ▄ k=1 bg=bl fg=tr */
PICK(bl2, br2, bl2, bl2); /* ▝ k=3 bg=bl fg=br */
PICK(bl2, br2, bl2, br2); /* ▌ k=2 bg=br fg=bl */
PICK(bl2, br2, br2, bl2); /* ▞ k=6 bg=bl fg=br */
PICK(bl2, br2, br2, br2); /* ▘ k=7 bg=br fg=bl */
PICK(bl2, tl2, bl2, bl2); /* ▝ k=3 bg=bl fg=tl */
PICK(bl2, tl2, bl2, tl2); /* ▌ k=2 bg=tl fg=bl */
PICK(bl2, tl2, tl2, bl2); /* ▞ k=6 bg=bl fg=tl */
PICK(bl2, tl2, tl2, tl2); /* ▘ k=7 bg=tl fg=bl */
PICK(bl2, tr2, bl2, bl2); /* ▝ k=3 bg=bl fg=tr */
PICK(bl2, tr2, bl2, tr2); /* ▌ k=2 bg=tr fg=bl */
PICK(bl2, tr2, tr2, bl2); /* ▞ k=6 bg=bl fg=tr */
PICK(bl2, tr2, tr2, tr2); /* ▘ k=7 bg=tr fg=bl */
PICK(br2, bl2, bl2, bl2); /* ▘ k=7 bg=bl fg=br */
PICK(br2, bl2, bl2, br2); /* ▞ k=6 bg=br fg=bl */
PICK(br2, bl2, br2, bl2); /* ▌ k=2 bg=bl fg=br */
PICK(br2, bl2, br2, br2); /* ▝ k=3 bg=br fg=bl */
PICK(br2, br2, bl2, bl2); /* ▄ k=1 bg=br fg=bl */
PICK(br2, br2, bl2, br2); /* ▖ k=5 bg=br fg=bl */
PICK(br2, br2, br2, bl2); /* ▗ k=4 bg=br fg=bl */
PICK(br2, br2, br2, br2); /* k=0 bg=br fg=NULL */
PICK(br2, br2, br2, tl2); /* ▗ k=4 bg=br fg=tl */
PICK(br2, br2, br2, tr2); /* ▗ k=4 bg=br fg=tr */
PICK(br2, br2, tl2, br2); /* ▖ k=5 bg=br fg=tl */
PICK(br2, br2, tl2, tl2); /* ▄ k=1 bg=br fg=tl */
PICK(br2, br2, tr2, br2); /* ▖ k=5 bg=br fg=tr */
PICK(br2, br2, tr2, tr2); /* ▄ k=1 bg=br fg=tr */
PICK(br2, tl2, br2, br2); /* ▝ k=3 bg=br fg=tl */
PICK(br2, tl2, br2, tl2); /* ▌ k=2 bg=tl fg=br */
PICK(br2, tl2, tl2, br2); /* ▞ k=6 bg=br fg=tl */
PICK(br2, tl2, tl2, tl2); /* ▘ k=7 bg=tl fg=br */
PICK(br2, tr2, br2, br2); /* ▝ k=3 bg=br fg=tr */
PICK(br2, tr2, br2, tr2); /* ▌ k=2 bg=tr fg=br */
PICK(br2, tr2, tr2, br2); /* ▞ k=6 bg=br fg=tr */
PICK(br2, tr2, tr2, tr2); /* ▘ k=7 bg=tr fg=br */
PICK(tl2, bl2, bl2, bl2); /* ▘ k=7 bg=bl fg=tl */
PICK(tl2, bl2, bl2, tl2); /* ▞ k=6 bg=tl fg=bl */
PICK(tl2, bl2, tl2, bl2); /* ▌ k=2 bg=bl fg=tl */
PICK(tl2, bl2, tl2, tl2); /* ▝ k=3 bg=tl fg=bl */
PICK(tl2, br2, br2, br2); /* ▘ k=7 bg=br fg=tl */
PICK(tl2, br2, br2, tl2); /* ▞ k=6 bg=tl fg=br */
PICK(tl2, br2, tl2, br2); /* ▌ k=2 bg=br fg=tl */
PICK(tl2, br2, tl2, tl2); /* ▝ k=3 bg=tl fg=br */
PICK(tl2, tl2, bl2, bl2); /* ▄ k=1 bg=tl fg=bl */
PICK(tl2, tl2, bl2, tl2); /* ▖ k=5 bg=tl fg=bl */
PICK(tl2, tl2, br2, br2); /* ▄ k=1 bg=tl fg=br */
PICK(tl2, tl2, br2, tl2); /* ▖ k=5 bg=tl fg=br */
PICK(tl2, tl2, tl2, bl2); /* ▗ k=4 bg=tl fg=bl */
PICK(tl2, tl2, tl2, br2); /* ▗ k=4 bg=tl fg=br */
PICK(tl2, tl2, tl2, tl2); /* k=0 bg=tl fg=NULL */
PICK(tl2, tl2, tl2, tr2); /* ▗ k=4 bg=tl fg=tr */
PICK(tl2, tl2, tr2, tl2); /* ▖ k=5 bg=tl fg=tr */
PICK(tl2, tl2, tr2, tr2); /* ▄ k=1 bg=tl fg=tr */
PICK(tl2, tr2, tl2, tl2); /* ▝ k=3 bg=tl fg=tr */
PICK(tl2, tr2, tl2, tr2); /* ▌ k=2 bg=tr fg=tl */
PICK(tl2, tr2, tr2, tl2); /* ▞ k=6 bg=tl fg=tr */
PICK(tl2, tr2, tr2, tr2); /* ▘ k=7 bg=tr fg=tl */
PICK(tr2, bl2, bl2, bl2); /* ▘ k=7 bg=bl fg=tr */
PICK(tr2, bl2, bl2, tr2); /* ▞ k=6 bg=tr fg=bl */
PICK(tr2, bl2, tr2, bl2); /* ▌ k=2 bg=bl fg=tr */
PICK(tr2, bl2, tr2, tr2); /* ▝ k=3 bg=tr fg=bl */
PICK(tr2, br2, br2, br2); /* ▘ k=7 bg=br fg=tr */
PICK(tr2, br2, br2, tr2); /* ▞ k=6 bg=tr fg=br */
PICK(tr2, br2, tr2, br2); /* ▌ k=2 bg=br fg=tr */
PICK(tr2, br2, tr2, tr2); /* ▝ k=3 bg=tr fg=br */
PICK(tr2, tl2, tl2, tl2); /* ▘ k=7 bg=tl fg=tr */
PICK(tr2, tl2, tl2, tr2); /* ▞ k=6 bg=tr fg=tl */
PICK(tr2, tl2, tr2, tl2); /* ▌ k=2 bg=tl fg=tr */
PICK(tr2, tl2, tr2, tr2); /* ▝ k=3 bg=tr fg=tl */
PICK(tr2, tr2, bl2, bl2); /* ▄ k=1 bg=tr fg=bl */
PICK(tr2, tr2, bl2, tr2); /* ▖ k=5 bg=tr fg=bl */
PICK(tr2, tr2, br2, br2); /* ▄ k=1 bg=tr fg=br */
PICK(tr2, tr2, br2, tr2); /* ▖ k=5 bg=tr fg=br */
PICK(tr2, tr2, tl2, tl2); /* ▄ k=1 bg=tr fg=tl */
PICK(tr2, tr2, tl2, tr2); /* ▖ k=5 bg=tr fg=tl */
PICK(tr2, tr2, tr2, bl2); /* ▗ k=4 bg=tr fg=bl */
PICK(tr2, tr2, tr2, br2); /* ▗ k=4 bg=tr fg=br */
PICK(tr2, tr2, tr2, tl2); /* ▗ k=4 bg=tr fg=tl */
PICK(tr2, tr2, tr2, tr2); /* k=0 bg=tr fg=NULL */
#undef PICK
return p;
}
static uint16_t *PickCp437(uint16_t *p, struct TtyRgb tl, struct TtyRgb tr,
struct TtyRgb bl, struct TtyRgb br,
struct TtyRgb tl2, struct TtyRgb tr2,
struct TtyRgb bl2, struct TtyRgb br2) {
#define PICK(A, B, C, D) *p++ = GetBlockDist(tl, tr, bl, br, A, B, C, D)
PICK(bl2, bl2, bl2, bl2); /* k=0 bg=bl fg=NULL */
PICK(bl2, bl2, br2, br2); /* ▄ k=1 bg=bl fg=br */
PICK(bl2, bl2, tl2, tl2); /* ▄ k=1 bg=bl fg=tl */
PICK(bl2, bl2, tr2, tr2); /* ▄ k=1 bg=bl fg=tr */
PICK(br2, br2, bl2, bl2); /* ▄ k=1 bg=br fg=bl */
PICK(tl2, tl2, bl2, bl2); /* ▄ k=1 bg=tl fg=bl */
PICK(tr2, tr2, bl2, bl2); /* ▄ k=1 bg=tr fg=bl */
PICK(bl2, br2, bl2, br2); /* ▌ k=2 bg=br fg=bl */
PICK(bl2, tl2, bl2, tl2); /* ▌ k=2 bg=tl fg=bl */
PICK(bl2, tr2, bl2, tr2); /* ▌ k=2 bg=tr fg=bl */
PICK(br2, bl2, br2, bl2); /* ▌ k=2 bg=bl fg=br */
PICK(br2, br2, br2, br2); /* k=0 bg=br fg=NULL */
PICK(br2, br2, tl2, tl2); /* ▄ k=1 bg=br fg=tl */
PICK(br2, br2, tr2, tr2); /* ▄ k=1 bg=br fg=tr */
PICK(br2, tl2, br2, tl2); /* ▌ k=2 bg=tl fg=br */
PICK(br2, tr2, br2, tr2); /* ▌ k=2 bg=tr fg=br */
PICK(tl2, bl2, tl2, bl2); /* ▌ k=2 bg=bl fg=tl */
PICK(tl2, br2, tl2, br2); /* ▌ k=2 bg=br fg=tl */
PICK(tl2, tl2, br2, br2); /* ▄ k=1 bg=tl fg=br */
PICK(tl2, tl2, tl2, tl2); /* k=0 bg=tl fg=NULL */
PICK(tl2, tl2, tr2, tr2); /* ▄ k=1 bg=tl fg=tr */
PICK(tl2, tr2, tl2, tr2); /* ▌ k=2 bg=tr fg=tl */
PICK(tr2, bl2, tr2, bl2); /* ▌ k=2 bg=bl fg=tr */
PICK(tr2, br2, tr2, br2); /* ▌ k=2 bg=br fg=tr */
PICK(tr2, tl2, tr2, tl2); /* ▌ k=2 bg=tl fg=tr */
PICK(tr2, tr2, br2, br2); /* ▄ k=1 bg=tr fg=br */
PICK(tr2, tr2, tl2, tl2); /* ▄ k=1 bg=tr fg=tl */
PICK(tr2, tr2, tr2, tr2); /* k=0 bg=tr fg=NULL */
#undef PICK
return p;
}
static struct Pick PickBlockUnicodeAnsi(struct TtyRgb tl, struct TtyRgb tr,
struct TtyRgb bl, struct TtyRgb br) {
struct TtyRgb tl2 = GetQuant(tl);
struct TtyRgb tr2 = GetQuant(tr);
struct TtyRgb bl2 = GetQuant(bl);
struct TtyRgb br2 = GetQuant(br);
unsigned p1, p2;
uint16_t picks1[96] forcealign(32);
uint16_t picks2[32] forcealign(32);
memset(picks1, 0x79, sizeof(picks1));
memset(picks2, 0x79, sizeof(picks2));
PickUnicode(picks1, tl, tr, bl, br, tl2, tr2, bl2, br2);
MixBlock(picks2, tl, tr, bl, br, tl2, tr2, bl2, br2);
p1 = windex(picks1, 96);
p2 = windex(picks2, 32);
return picks1[p1] <= picks2[p2] ? kPicksUnicode[p1] : kPicksMixBlock[p2];
}
static struct Pick PickBlockUnicodeTrue(struct TtyRgb tl, struct TtyRgb tr,
struct TtyRgb bl, struct TtyRgb br) {
unsigned i;
uint16_t picks[96] forcealign(32);
memset(picks, 0x79, sizeof(picks));
PickUnicode(picks, tl, tr, bl, br, tl, tr, bl, br);
i = windex(picks, 96);
return kPicksUnicode[i];
}
static struct Pick PickBlockCp437Ansi(struct TtyRgb tl, struct TtyRgb tr,
struct TtyRgb bl, struct TtyRgb br) {
struct TtyRgb tl2 = GetQuant(tl);
struct TtyRgb tr2 = GetQuant(tr);
struct TtyRgb bl2 = GetQuant(bl);
struct TtyRgb br2 = GetQuant(br);
unsigned p1, p2;
uint16_t picks1[32] forcealign(32);
uint16_t picks2[32] forcealign(32);
memset(picks1, 0x79, sizeof(picks1));
memset(picks2, 0x79, sizeof(picks2));
PickCp437(picks1, tl, tr, bl, br, tl2, tr2, bl2, br2);
MixBlock(picks2, tl, tr, bl, br, tl2, tr2, bl2, br2);
p1 = windex(picks1, 32);
p2 = windex(picks2, 32);
return picks1[p1] <= picks2[p2] ? kPicksCp437[p1] : kPicksMixBlock[p2];
}
static struct Pick PickBlockCp437True(struct TtyRgb tl, struct TtyRgb tr,
struct TtyRgb bl, struct TtyRgb br) {
uint16_t picks[32] forcealign(32);
memset(picks, 0x79, sizeof(picks));
PickCp437(picks, tl, tr, bl, br, tl, tr, bl, br);
return kPicksCp437[windex(picks, 32)];
}
static char *CopyGlyph(char *v, struct Glyph glyph) {
memcpy(v, &glyph, 4);
return v + glyph.len;
}
static char *CopyBlock(char *v, const struct TtyRgb chunk[hasatleast 4],
struct Pick pick, struct TtyRgb *bg, struct TtyRgb *fg,
struct Glyph *glyph) {
unsigned i;
CHECK_LT(pick.bg, 4);
if (pick.fg != 0xff) CHECK_LT(pick.fg, 4);
i = 0;
if (pick.fg == 0xff) {
if (!ttyeq(*bg, chunk[pick.bg])) {
if (ttyeq(*fg, chunk[pick.bg])) {
if (memcmp(glyph, &kGlyphs[1][0], sizeof(*glyph)) == 0) {
v = setbg(v, (*bg = *fg));
} else {
i = 1;
}
} else {
v = setbg(v, (*bg = chunk[pick.bg]));
}
}
} else if (ttyeq(chunk[pick.bg], chunk[pick.fg])) {
pick.k = 0;
if (!ttyeq(*bg, chunk[pick.bg])) {
if (ttyeq(*fg, chunk[pick.bg])) {
if (memcmp(glyph, &kGlyphs[1][0], sizeof(*glyph)) == 0) {
v = setbg(v, (*bg = *fg));
} else {
i = 1;
}
} else {
v = setbg(v, (*bg = chunk[pick.bg]));
}
}
} else if (!ttyeq(*fg, chunk[pick.fg])) {
if (!ttyeq(*bg, chunk[pick.bg])) {
if (ttyeq(*fg, chunk[pick.bg]) && ttyeq(*bg, chunk[pick.fg])) {
if (pick.k == 0 && memcmp(glyph, &kGlyphs[1][0], sizeof(*glyph)) == 0) {
v = setbg(v, (*bg = *fg));
} else {
i = 1;
}
} else {
v = setbgfg(v, (*bg = chunk[pick.bg]), (*fg = chunk[pick.fg]));
}
} else {
v = setfg(v, (*fg = chunk[pick.fg]));
}
} else if (!ttyeq(*bg, chunk[pick.bg])) {
v = setbg(v, (*bg = chunk[pick.bg]));
}
return CopyGlyph(v, (*glyph = kGlyphs[i][pick.k]));
}
static bool ChunkEq(struct TtyRgb c[hasatleast 4],
struct TtyRgb c2[hasatleast 4]) {
return ttyeq(c[TL], c[TR]) && ttyeq(c[BL], c[BR]) && ttyeq(c2[TL], c2[TR]) &&
ttyeq(c2[BL], c2[BR]);
}
static struct TtyRgb *CopyChunk(struct TtyRgb chunk[hasatleast 4],
const struct TtyRgb *c, size_t xn) {
chunk[TL] = c[00 + 0];
chunk[TR] = c[00 + 1];
chunk[BL] = c[xn + 0];
chunk[BR] = c[xn + 1];
return chunk;
}
static dontinline char *CopyRun(char *v, size_t n,
struct TtyRgb lastchunk[hasatleast 4],
const struct TtyRgb **c, size_t *x,
struct TtyRgb *bg, struct TtyRgb *fg,
struct Glyph *glyph) {
struct TtyRgb chunk[4];
if (memcmp(glyph, &kGlyphs[1][0], sizeof(*glyph)) == 0) {
if (!ttyeq(*bg, *fg)) {
v = setbg(v, (*bg = *fg));
}
*glyph = kGlyphs[0][0];
}
do {
v = CopyGlyph(v, *glyph);
*x += 2;
*c += 2;
if (*x >= n) break;
CopyChunk(chunk, *c, n);
} while (ChunkEq(chunk, lastchunk));
*x -= 2;
*c -= 2;
return v;
}
/**
* Maps 2×2 pixel chunks onto ANSI UNICODE cells.
* @note h/t Nick Black for his quadrant blitting work on notcurses
* @note yn and xn need to be even
*/
char *ttyraster(char *v, const struct TtyRgb *c, size_t yn, size_t xn,
struct TtyRgb bg, struct TtyRgb fg) {
unsigned y, x;
struct Pick p;
struct Glyph glyph;
struct TtyRgb chun[4], lastchunk[4];
for (y = 0; y < yn; y += 2, c += xn) {
if (y) {
v = stpcpy(v, "\e[0m\r\n");
v = setbgfg(v, bg, fg);
}
for (x = 0; x < xn; x += 2, c += 2) {
CopyChunk(chun, c, xn);
if (ttyquant()->alg == kTtyQuantTrue) {
if (ttyquant()->blocks == kTtyBlocksCp437) {
p = PickBlockCp437True(chun[TL], chun[TR], chun[BL], chun[BR]);
} else {
p = PickBlockUnicodeTrue(chun[TL], chun[TR], chun[BL], chun[BR]);
}
} else {
if (ttyquant()->blocks == kTtyBlocksCp437) {
p = PickBlockCp437Ansi(chun[TL], chun[TR], chun[BL], chun[BR]);
} else {
p = PickBlockUnicodeAnsi(chun[TL], chun[TR], chun[BL], chun[BR]);
}
}
v = CopyBlock(v, chun, p, &bg, &fg, &glyph);
memcpy(lastchunk, chun, sizeof(chun));
}
}
v = stpcpy(v, "\e[0m");
return v;
}
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