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/* See LICENSE file for copyright and license details. */
#include "stream.h"
#include "util.h"
#include <inttypes.h>
#include <string.h>
#include <unistd.h>
USAGE("[-f frames | -f 'inf'] -w width -h height (X Y Z | Y) [alpha]")
typedef double pixel_t[4];
int
main(int argc, char *argv[])
{
struct stream stream;
double X, Y, Z, alpha = 1;
size_t x, y, n;
pixel_t buf[BUFSIZ / 4];
ssize_t r;
int inf = 0;
char *arg;
stream.width = 0;
stream.height = 0;
stream.frames = 1;
ARGBEGIN {
case 'f':
arg = UARGF();
if (!strcmp(arg, "inf"))
inf = 1, stream.frames = 0;
else
stream.frames = etozu_flag('f', arg, 1, SIZE_MAX);
break;
case 'w':
stream.width = etozu_flag('w', UARGF(), 1, SIZE_MAX);
break;
case 'h':
stream.height = etozu_flag('h', UARGF(), 1, SIZE_MAX);
break;
default:
usage();
} ARGEND;
if (!stream.width || !stream.height || !argc || argc > 4)
usage();
if (argc < 3) {
X = D65_XYY_X / D65_XYY_Y;
Z = 1 / D65_XYY_Y - 1 - X;
Y = etolf_arg("the Y value", argv[0]);
X *= Y;
Z *= Y;
} else {
X = etolf_arg("the X value", argv[0]);
Y = etolf_arg("the Y value", argv[1]);
Z = etolf_arg("the Z value", argv[2]);
}
if (~argc & 1)
alpha = etolf_arg("the alpha value", argv[argc - 1]);
if (inf)
einf_check_fd(STDOUT_FILENO, "<stdout>");
strcpy(stream.pixfmt, "xyza");
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
for (x = 0; x < ELEMENTSOF(buf); x++) {
buf[x][0] = X;
buf[x][1] = Y;
buf[x][2] = Z;
buf[x][3] = alpha;
}
while (inf || stream.frames--) {
for (y = stream.height; y--;) {
for (x = stream.width; x;) {
x -= n = MIN(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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