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cosmopolitan/tool/viz/magikarp.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/c1331.h"
#include "dsp/core/c161.h"
#include "dsp/core/core.h"
#include "dsp/scale/scale.h"
#include "libc/assert.h"
#include "libc/calls/calls.h"
#include "libc/calls/struct/stat.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/gc.internal.h"
#include "libc/mem/mem.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/rand.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.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/testlib/testlib.h"
#include "libc/x/x.h"
#include "third_party/gdtoa/gdtoa.h"
#include "third_party/getopt/getopt.h"
#include "third_party/stb/stb_image.h"
#include "tool/viz/lib/bilinearscale.h"
#include "tool/viz/lib/graphic.h"
#define LONG long
#define CHAR char
#define CLAMP(X) MIN(255, MAX(0, X))
#define C13(A, B) (((A) + 3 * (B) + 2) >> 2)
#define LERP(X, Y, P) ((X) + (((P) * ((Y) - (X))) >> 8))
static double r_;
static unsigned char ChessBoard(unsigned y, unsigned x, unsigned char a,
unsigned char b) {
return !((y ^ x) & (1u << 2)) ? a : b;
}
static unsigned char AlphaBackground(unsigned y, unsigned x) {
return ChessBoard(y, x, 255, 200);
}
static unsigned char OutOfBoundsBackground(unsigned y, unsigned x) {
return ChessBoard(y, x, 40, 80);
}
static unsigned char Opacify(CHAR w, const unsigned char P[1u << w][1u << w],
const unsigned char A[1u << w][1u << w], LONG yn,
LONG xn, long y, long x) {
if ((0 <= y && y < yn) && (0 <= x && x < xn)) {
return LERP(AlphaBackground(y, x), P[y][x], A[y][x]);
} else {
return OutOfBoundsBackground(y, x);
}
}
static void PrintImage(CHAR w, unsigned char R[1u << w][1u << w],
unsigned char G[1u << w][1u << w],
unsigned char B[1u << w][1u << w],
unsigned char A[1u << w][1u << w], LONG yn, LONG xn) {
bool didhalfy;
long y, x;
didhalfy = false;
for (y = 0; y < yn; y += 2) {
if (y) printf("\e[0m\n");
for (x = 0; x < xn; ++x) {
printf("\e[48;2;%d;%d;%d;38;2;%d;%d;%dm▄",
Opacify(w, R, A, yn, xn, y + 0, x),
Opacify(w, G, A, yn, xn, y + 0, x),
Opacify(w, B, A, yn, xn, y + 0, x),
Opacify(w, R, A, yn, xn, y + 1, x),
Opacify(w, G, A, yn, xn, y + 1, x),
Opacify(w, B, A, yn, xn, y + 1, x));
}
if (y == 0) {
printf("\e[0m‾0");
} else if (yn / 2 <= y && y <= yn / 2 + 1 && !didhalfy) {
printf("\e[0m‾%s%s", "yn/2", y % 2 ? "+1" : "");
didhalfy = true;
} else if (y + 1 == yn / 2 && !didhalfy) {
printf("\e[0m⎯yn/2");
didhalfy = true;
} else if (y + 1 == yn) {
printf("\e[0m⎯yn");
} else if (y + 2 == yn) {
printf("\e[0m_yn");
} else if (!(y % 10)) {
printf("\e[0m‾%,u", y);
}
}
printf("\e[0m\n");
}
static void DeblinterlaceRgba(CHAR w, unsigned char R[1u << w][1u << w],
unsigned char G[1u << w][1u << w],
unsigned char B[1u << w][1u << w],
unsigned char A[1u << w][1u << w], LONG yn,
LONG xn, const unsigned char src[yn][xn][4]) {
long y, x;
for (y = 0; y < yn; ++y) {
for (x = 0; x < xn; ++x) {
R[y][x] = src[y][x][0];
G[y][x] = src[y][x][1];
B[y][x] = src[y][x][2];
A[y][x] = src[y][x][3];
}
}
}
static void SharpenX(CHAR w, unsigned char dst[1u << w][1u << w],
const unsigned char src[1u << w][1u << w], char yw,
char xw) {
int y, x;
for (y = 0; y < (1u << yw); ++y) {
for (x = 0; x < (1u << xw); ++x) {
dst[y][x] = C161(src[y][MAX(0, x - 1)], src[y][x],
src[y][MIN((1u << xw) - 1, x + 1)]);
}
}
}
static void SharpenY(CHAR w, unsigned char dst[1u << w][1u << w],
const unsigned char src[1u << w][1u << w], char yw,
char xw) {
int y, x;
for (y = 0; y < (1u << yw); ++y) {
for (x = 0; x < (1u << xw); ++x) {
dst[y][x] = C161(src[MAX(0, y - 1)][x], src[y][x],
src[MIN((1u << yw) - 1, y + 1)][x]);
}
}
}
static void UpscaleX(CHAR w, unsigned char img[1u << w][1u << w], char yw,
char xw) {
long y, x;
for (y = (1u << yw); y--;) {
for (x = (1u << xw); --x;) {
img[y][x] =
C13(img[y][MIN(((1u << xw) >> 1) - 1, (x >> 1) - 1 + (x & 1) * 2)],
img[y][x >> 1]);
}
}
}
static void UpscaleY(CHAR w, unsigned char img[1u << w][1u << w], char yw,
char xw) {
long y, x;
for (y = (1u << yw); --y;) {
for (x = (1u << xw); x--;) {
img[y][x] =
C13(img[MIN(((1u << yw) >> 1) - 1, (y >> 1) - 1 + (y & 1) * 2)][x],
img[y >> 1][x]);
}
}
}
static void Upscale(CHAR w, unsigned char img[1u << w][1u << w],
unsigned char tmp[1u << w][1u << w], char yw, char xw) {
UpscaleY(w, img, yw, xw - 1);
SharpenY(w, tmp, img, yw, xw - 1);
UpscaleX(w, tmp, yw, xw);
SharpenX(w, img, tmp, yw, xw);
}
#if 0
static void *MagikarpY(CHAR w, unsigned char p[1u << w][1u << w], char yw,
char xw) {
long y, x, yn, xn, ym;
unsigned char(*t)[(1u << w) + 2][1u << w];
t = memalign(64, ((1u << w) + 2) * (1u << w));
bzero(t, ((1u << w) + 2) * (1u << w));
yn = 1u << yw;
xn = 1u << xw;
ym = yn >> 1;
for (y = 0; y < ym; ++y) {
for (x = 0; x < xn; ++x) {
(*t)[y + 1][x] =
C1331(y ? p[(y << 1) - 1][x] : 0, p[y << 1][x], p[(y << 1) + 1][x],
p[MIN(yn - 1, (y << 1) + 2)][x]);
}
}
for (y = 0; y < ym; ++y) {
for (x = 0; x < xn; ++x) {
p[y][x] =
C161((*t)[y + 1 - 1][x], (*t)[y + 1 + 0][x], (*t)[y + 1 + 1][x]);
}
}
free(t);
return p;
}
static void *MagikarpX(CHAR w, unsigned char p[1u << w][1u << w], char yw,
char xw) {
int y, x;
LONG yn, xn, xm;
yn = 1u << yw;
xn = 1u << xw;
xm = xn >> 1;
for (x = 0; x < xm; ++x) {
for (y = 0; y < yn; ++y) {
p[y][(xn - xm - 1) + (xm - x - 1)] =
C1331(p[y][MAX(00 + 0, xn - (x << 1) - 1 + (xn & 1) - 1)],
p[y][MIN(xn - 1, xn - (x << 1) - 1 + (xn & 1) + 0)],
p[y][MIN(xn - 1, xn - (x << 1) - 1 + (xn & 1) + 1)],
p[y][MIN(xn - 1, xn - (x << 1) - 1 + (xn & 1) + 2)]);
}
}
for (x = 0; x < xm; ++x) {
for (y = 0; y < yn; ++y) {
p[y][x] = C161(p[y][MAX(xn - 1 - xm, xn - xm - 1 + x - 1)],
p[y][MIN(xn - 1 - 00, xn - xm - 1 + x + 0)],
p[y][MIN(xn - 1 - 00, xn - xm - 1 + x + 1)]);
}
}
return p;
}
static void ProcessImageVerbatim(LONG yn, LONG xn,
unsigned char img[yn][xn][4]) {
CHAR w;
void *R, *G, *B, *A;
w = _roundup2log(MAX(yn, xn));
R = xvalloc((1u << w) * (1u << w));
G = xvalloc((1u << w) * (1u << w));
B = xvalloc((1u << w) * (1u << w));
A = xvalloc((1u << w) * (1u << w));
DeblinterlaceRgba(w, R, G, B, A, yn, xn, img);
PrintImage(w, R, G, B, A, yn, xn);
free(R);
free(G);
free(B);
free(A);
}
static void ProcessImageDouble(LONG yn, LONG xn, unsigned char img[yn][xn][4]) {
CHAR w;
void *t, *R, *G, *B, *A;
w = _roundup2log(MAX(yn, xn)) + 1;
t = xvalloc((1u << w) * (1u << w));
R = xvalloc((1u << w) * (1u << w));
G = xvalloc((1u << w) * (1u << w));
B = xvalloc((1u << w) * (1u << w));
A = xvalloc((1u << w) * (1u << w));
DeblinterlaceRgba(w, R, G, B, A, yn, xn, img);
Upscale(w, R, t, w, w);
Upscale(w, G, t, w, w);
Upscale(w, B, t, w, w);
Upscale(w, A, t, w, w);
free(t);
PrintImage(w, R, G, B, A, yn * 2, xn * 2);
free(R);
free(G);
free(B);
free(A);
}
static void ProcessImageHalf(LONG yn, LONG xn, unsigned char img[yn][xn][4]) {
CHAR w;
void *R, *G, *B, *A;
w = _roundup2log(MAX(yn, xn));
R = xvalloc((1u << w) * (1u << w));
G = xvalloc((1u << w) * (1u << w));
B = xvalloc((1u << w) * (1u << w));
A = xvalloc((1u << w) * (1u << w));
DeblinterlaceRgba(w, R, G, B, A, yn, xn, img);
MagikarpY(w, R, w, w);
MagikarpY(w, G, w, w);
MagikarpY(w, B, w, w);
MagikarpY(w, A, w, w);
MagikarpX(w, R, w - 1, w);
MagikarpX(w, G, w - 1, w);
MagikarpX(w, B, w - 1, w);
MagikarpX(w, A, w - 1, w);
PrintImage(w, R, G, B, A, yn >> 1, xn >> 1);
free(R);
free(G);
free(B);
free(A);
}
static void ProcessImageHalfY(LONG yn, LONG xn, unsigned char img[yn][xn][4]) {
CHAR w;
void *R, *G, *B, *A;
w = _roundup2log(MAX(yn, xn));
R = xvalloc((1u << w) * (1u << w));
G = xvalloc((1u << w) * (1u << w));
B = xvalloc((1u << w) * (1u << w));
A = xvalloc((1u << w) * (1u << w));
DeblinterlaceRgba(w, R, G, B, A, yn, xn, img);
MagikarpY(w, R, w, w);
MagikarpY(w, G, w, w);
MagikarpY(w, B, w, w);
MagikarpY(w, A, w, w);
PrintImage(w, R, G, B, A, yn >> 1, xn);
free(R);
free(G);
free(B);
free(A);
}
static void ProcessImageHalfLanczos(LONG yn, LONG xn,
unsigned char img[yn][xn][4]) {
CHAR w;
void *t, *R, *G, *B, *A;
t = xvalloc((yn >> 1) * (xn >> 1) * 4);
lanczos1b(yn >> 1, xn >> 1, t, yn, xn, &img[0][0][0]);
w = _roundup2log(MAX(yn >> 1, xn >> 1));
R = xvalloc((1u << w) * (1u << w));
G = xvalloc((1u << w) * (1u << w));
B = xvalloc((1u << w) * (1u << w));
A = xvalloc((1u << w) * (1u << w));
DeblinterlaceRgba(w, R, G, B, A, yn >> 1, xn >> 1, img);
free(t);
PrintImage(w, R, G, B, A, yn >> 1, xn >> 1);
free(R);
free(G);
free(B);
free(A);
}
static void ProcessImageWash(LONG yn, LONG xn, unsigned char img[yn][xn][4]) {
long w;
void *R, *G, *B, *A, *t;
w = _roundup2log(MAX(yn, xn)) + 1;
t = xvalloc((1u << w) * (1u << w));
R = xvalloc((1u << w) * (1u << w));
G = xvalloc((1u << w) * (1u << w));
B = xvalloc((1u << w) * (1u << w));
A = xvalloc((1u << w) * (1u << w));
DeblinterlaceRgba(w, R, G, B, A, yn, xn, img);
Upscale(w, R, t, w, w);
Upscale(w, G, t, w, w);
Upscale(w, B, t, w, w);
Upscale(w, A, t, w, w);
MagikarpY(w, R, w, w);
MagikarpY(w, G, w, w);
MagikarpY(w, B, w, w);
MagikarpY(w, A, w, w);
MagikarpX(w, R, w - 1, w);
MagikarpX(w, G, w - 1, w);
MagikarpX(w, B, w - 1, w);
MagikarpX(w, A, w - 1, w);
free(t);
PrintImage(w, R, G, B, A, yn, xn);
free(R);
free(G);
free(B);
free(A);
}
#endif
#if 0
static void *MagikarpY(size_t ys, size_t xs, unsigned char p[ys][xs], size_t yn,
size_t xn) {
int y, x, h, b;
b = yn % 2;
h = yn / 2;
if (b && yn < ys) yn++;
for (y = b; y < h + b; ++y) {
for (x = 0; x < xn; ++x) {
p[(yn - h - 1) + (h - y - 1)][x] =
C1331(p[MAX(00 + 0, yn - y * 2 - 1 - 1)][x],
p[MIN(yn - 1, yn - y * 2 - 1 + 0)][x],
p[MIN(yn - 1, yn - y * 2 - 1 + 1)][x],
p[MIN(yn - 1, yn - y * 2 - 1 + 2)][x]);
}
}
for (y = b; y < h + b; ++y) {
for (x = 0; x < xn; ++x) {
p[y][x] = C161(p[MAX(yn - 1 - h, yn - h - 1 + y - 1)][x],
p[MIN(yn - 1 - 0, yn - h - 1 + y + 0)][x],
p[MIN(yn - 1 - 0, yn - h - 1 + y + 1)][x]);
}
}
return p;
}
#endif
#if 0
static void *MagikarpX(size_t ys, size_t xs, unsigned char p[ys][xs], size_t yn,
size_t xn) {
int y, x, w, b;
b = xn % 2;
w = xn / 2;
if (b && xn < xs) xn++;
for (x = 0; x < w; ++x) {
for (y = b; y < yn + b; ++y) {
p[y][(xn - w - 1) + (w - x - 1)] =
C1331(p[y][MAX(00 + 0, xn - x * 2 - 1 - 1)],
p[y][MIN(xn - 1, xn - x * 2 - 1 + 0)],
p[y][MIN(xn - 1, xn - x * 2 - 1 + 1)],
p[y][MIN(xn - 1, xn - x * 2 - 1 + 2)]);
}
}
for (x = 0; x < w; ++x) {
for (y = b; y < yn + b; ++y) {
p[y][x] = C161(p[y][MAX(xn - 1 - w, xn - w - 1 + x - 1)],
p[y][MIN(xn - 1 - 0, xn - w - 1 + x + 0)],
p[y][MIN(xn - 1 - 0, xn - w - 1 + x + 1)]);
}
}
return p;
}
#endif
#if 0
static void ProcessImageMagikarpImpl(CHAR sw,
unsigned char src[5][1u << sw][1u << sw],
LONG syn, LONG sxn,
const unsigned char img[syn][sxn][4],
LONG dyn, LONG dxn) {
DeblinterlaceRgba2(sw, src, syn, sxn, img);
MagikarpY(sw, src[0], sw, sw);
MagikarpX(sw, src[0], sw - 1, sw);
MagikarpY(sw, src[1], sw, sw);
MagikarpX(sw, src[1], sw - 1, sw);
MagikarpY(sw, src[2], sw, sw);
MagikarpX(sw, src[2], sw - 1, sw);
BilinearScale(sw, src[4], sw, src[3], dyn, dxn, syn, sxn);
memcpy(src[3], src[4], syn * sxn);
PrintImage2(sw, src, dyn, dxn);
}
static void ProcessImageMagikarp(LONG syn, LONG sxn,
unsigned char img[syn][sxn][4]) {
CHAR sw;
LONG dyn, dxn;
dyn = syn >> 1;
dxn = sxn >> 1;
sw = _roundup2log(MAX(syn, sxn));
ProcessImageMagikarpImpl(sw, gc(xvalloc((1u << sw) * (1u << sw) * 5)), syn,
sxn, img, dyn, dxn);
}
#endif
/*
********************************************************************************
*/
static unsigned char Opacify2(unsigned yw, unsigned xw,
const unsigned char P[yw][xw],
const unsigned char A[yw][xw], unsigned yn,
unsigned xn, unsigned y, unsigned x) {
if ((0 <= y && y < yn) && (0 <= x && x < xn)) {
return LERP(AlphaBackground(y, x), P[y][x], A[y][x]);
} else {
return OutOfBoundsBackground(y, x);
}
}
static dontinline void PrintImage2(unsigned yw, unsigned xw,
unsigned char img[4][yw][xw], unsigned yn,
unsigned xn) {
bool didhalfy;
unsigned y, x;
didhalfy = false;
for (y = 0; y < yn; y += 2) {
if (y) printf("\e[0m\n");
for (x = 0; x < xn; ++x) {
printf("\e[48;2;%d;%d;%d;38;2;%d;%d;%dm▄",
Opacify2(yw, xw, img[0], img[3], yn, xn, y + 0, x),
Opacify2(yw, xw, img[1], img[3], yn, xn, y + 0, x),
Opacify2(yw, xw, img[2], img[3], yn, xn, y + 0, x),
Opacify2(yw, xw, img[0], img[3], yn, xn, y + 1, x),
Opacify2(yw, xw, img[1], img[3], yn, xn, y + 1, x),
Opacify2(yw, xw, img[2], img[3], yn, xn, y + 1, x));
}
if (y == 0) {
printf("\e[0m‾0");
} else if (yn / 2 <= y && y <= yn / 2 + 1 && !didhalfy) {
printf("\e[0m‾%s%s", "yn/2", y % 2 ? "+1" : "");
didhalfy = true;
} else if (y + 1 == yn / 2 && !didhalfy) {
printf("\e[0m⎯yn/2");
didhalfy = true;
} else if (y + 1 == yn) {
printf("\e[0m⎯yn");
} else if (y + 2 == yn) {
printf("\e[0m_yn");
} else if (!(y % 10)) {
printf("\e[0m‾%,u", y);
}
}
printf("\e[0m\n");
}
static dontinline void *DeblinterlaceRgba2(unsigned yn, unsigned xn,
unsigned char D[4][yn][xn],
const unsigned char S[yn][xn][4]) {
unsigned y, x;
for (y = 0; y < yn; ++y) {
for (x = 0; x < xn; ++x) {
D[0][y][x] = S[y][x][0];
D[1][y][x] = S[y][x][1];
D[2][y][x] = S[y][x][2];
D[3][y][x] = S[y][x][3];
}
}
return D;
}
void ProcessImageBilinearImpl(unsigned dyn, unsigned dxn,
unsigned char dst[4][dyn][dxn], unsigned syn,
unsigned sxn, unsigned char src[4][syn][sxn],
unsigned char img[syn][sxn][4]) {
DeblinterlaceRgba2(syn, sxn, src, img);
BilinearScale(4, dyn, dxn, dst, 4, syn, sxn, src, 0, 4, dyn, dxn, syn, sxn,
r_, r_, 0, 0);
PrintImage2(dyn, dxn, dst, dyn, dxn);
}
void ProcessImageBilinear(unsigned yn, unsigned xn,
unsigned char img[yn][xn][4]) {
unsigned dyn, dxn;
dyn = lround(yn / r_);
dxn = lround(xn / r_);
ProcessImageBilinearImpl(dyn, dxn, gc(xmalloc(dyn * dxn * 4)), yn, xn,
gc(xmalloc(yn * xn * 4)), img);
}
static void *b2f(long n, float dst[n], const unsigned char src[n]) {
long i;
float f;
for (i = 0; i < n; ++i) {
f = src[i];
f *= 1 / 255.;
dst[i] = f;
}
return dst;
}
static void *f2b(long n, unsigned char dst[n], const float src[n]) {
int x;
long i;
for (i = 0; i < n; ++i) {
x = lroundf(src[i] * 255);
dst[i] = MIN(255, MAX(0, x));
}
return dst;
}
void ProcessImageGyarados(unsigned yn, unsigned xn,
unsigned char img[yn][xn][4]) {
unsigned dyn, dxn;
dyn = lround(yn / r_);
dxn = lround(xn / r_);
PrintImage2(
dyn, dxn,
EzGyarados(4, dyn, dxn, gc(xmalloc(dyn * dxn * 4)), 4, yn, xn,
DeblinterlaceRgba2(yn, xn, gc(xmalloc(yn * xn * 4)), img), 0,
4, dyn, dxn, yn, xn, r_, r_, 0, 0),
dyn, dxn);
}
void MagikarpDecimate(int yw, int xw, unsigned char img[4][yw][xw], int yn,
int xn, int n) {
int c;
if (n <= 1) {
PrintImage2(yw, xw, img, yn, xn);
} else {
for (c = 0; c < 4; ++c) Magikarp2xY(yw, xw, img[c], yn, xn);
for (c = 0; c < 4; ++c) Magikarp2xX(yw, xw, img[c], (yn + 1) / 2, xn);
MagikarpDecimate(yw, xw, img, (yn + 1) / 2, (xn + 1) / 2, (n + 1) / 2);
}
}
void ProcessImageMagikarp(unsigned yn, unsigned xn,
unsigned char img[yn][xn][4]) {
MagikarpDecimate(yn, xn,
DeblinterlaceRgba2(yn, xn, gc(xmalloc(yn * xn * 4)), img),
yn, xn, lround(r_));
}
dontinline void WithImageFile(const char *path,
void fn(unsigned yn, unsigned xn,
unsigned char img[yn][xn][4])) {
struct stat st;
int fd, yn, xn;
void *map, *data;
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 = stbi_load_from_memory(map, st.st_size, &xn, &yn, NULL, 4)), "%s",
path);
CHECK_NE(-1, munmap(map, st.st_size));
CHECK_NE(-1, close(fd));
fn(yn, xn, data);
free(data);
}
int main(int argc, char *argv[]) {
int i, opt;
bool bilinear;
void (*scaler)(unsigned yn, unsigned xn, unsigned char[yn][xn][4]) =
ProcessImageMagikarp;
r_ = 2;
while ((opt = getopt(argc, argv, "mlsSybr:")) != -1) {
switch (opt) {
case 'r':
r_ = strtod(optarg, NULL);
break;
case 'm':
scaler = ProcessImageMagikarp;
break;
case 's':
case 'S':
scaler = ProcessImageGyarados;
break;
case 'b':
scaler = ProcessImageBilinear;
break;
default:
break;
}
}
ShowCrashReports();
for (i = optind; i < argc; ++i) {
WithImageFile(argv[i], scaler);
}
return 0;
}
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