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/* See LICENSE file for copyright and license details. */
#include "arg.h"
#include "util.h"
#include <inttypes.h>
#include <unistd.h>
typedef double pixel_t[4];
static void
usage(void)
{
eprintf("usage: %s [-f frames] -w width -h height (X Y Z | Y) [alpha]\n", argv0);
}
int
main(int argc, char *argv[])
{
double X, Y, Z, alpha = 1;
size_t width = 0, height = 0, frames = 1;
size_t x, y, n;
pixel_t buf[1024];
ssize_t r;
ARGBEGIN {
case 'f':
if (tozu(EARGF(usage()), 1, SIZE_MAX, &frames))
eprintf("argument of -f must be an integer in [1, %zu]\n", SIZE_MAX);
break;
case 'w':
if (tozu(EARGF(usage()), 1, SIZE_MAX, &width))
eprintf("argument of -w must be an integer in [1, %zu]\n", SIZE_MAX);
break;
case 'h':
if (tozu(EARGF(usage()), 1, SIZE_MAX, &height))
eprintf("argument of -h must be an integer in [1, %zu]\n", SIZE_MAX);
break;
default:
usage();
} ARGEND;
if (!width || !height || !argc || argc > 4)
usage();
if (argc < 3) {
X = D65_XYY_X / D65_XYY_Y;
Z = 1 / D65_XYY_Y - 1 - X;
if (tolf(argv[1], &Y))
eprintf("the Y value must be a floating-point value\n");
} else {
if (tolf(argv[0], &X))
eprintf("the X value must be a floating-point value\n");
if (tolf(argv[1], &Y))
eprintf("the Y value must be a floating-point value\n");
if (tolf(argv[2], &Z))
eprintf("the Z value must be a floating-point value\n");
}
if (!(argc & 1) && tolf(argv[argc - 1], &alpha))
eprintf("the alpha value must be a floating-point value\n");
for (x = 0; x < ELEMENTSOF(buf); x++) {
buf[x][0] = X;
buf[x][1] = Y;
buf[x][2] = Z;
buf[x][3] = alpha;
}
while (frames--) {
for (y = height; y--;) {
for (x = width; x;) {
x -= n = ELEMENTSOF(buf) < x ? ELEMENTSOF(buf) : x;
for (n *= sizeof(*buf); n; n -= (size_t)r) {
r = write(STDOUT_FILENO, buf, n);
if (r < 0)
eprintf("write <stdout>:");
}
}
}
}
return 0;
}
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