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/* See LICENSE file for copyright and license details. */
#include "util.h"
#include <arpa/inet.h>
#include <sys/wait.h>
#include <inttypes.h>
#include <string.h>
#include <unistd.h>
USAGE("[-h] [-f | -p]")
static double
get_value(void *buffer)
{
unsigned char *buf = buffer;
unsigned long int value;
double ret;
value = (unsigned long int)(buf[0]) << 12;
value += (unsigned long int)(buf[1]) << 8;
value += (unsigned long int)(buf[2]) << 4;
value += (unsigned long int)(buf[3]);
ret = value;
value = 1UL << 15;
value |= value - 1;
ret /= value;
return ret;
}
int
main(int argc, char *argv[])
{
int pipe_rw[2];
int i, old_fd;
pid_t pid = 0;
int status;
char buf[8096];
size_t ptr, n;
char *p;
ssize_t r;
double red, green, blue, pixel[4];
char width[3 * sizeof(size_t) + 1] = {0};
char height[3 * sizeof(size_t) + 1] = {0};
int headless = 0, farbfeld = 0, pam = 0;
const char *file = "<subprocess>";
const char *conv_fail_msg = "convertion failed, if converting a farbfeld file, try -f";
ARGBEGIN {
case 'f':
farbfeld = 1;
break;
case 'h':
headless = 1;
break;
case 'p':
pam = 1;
break;
default:
usage();
} ARGEND;
if (argc || (farbfeld && pam))
usage();
if (farbfeld || pam) {
if (farbfeld)
conv_fail_msg = "not a valid farbfeld file, try without -f";
else
conv_fail_msg = "not a valid 16-bit RGBA portable arbitrary map file, try without -p";
file = "<stdin>";
pipe_rw[0] = STDIN_FILENO;
goto after_fork;
}
if (pipe(pipe_rw))
eprintf("pipe:");
if (pipe_rw[0] == STDIN_FILENO || pipe_rw[1] == STDIN_FILENO)
eprintf("no stdin open\n");
if (pipe_rw[0] == STDOUT_FILENO || pipe_rw[1] == STDOUT_FILENO)
eprintf("no stdout open\n");
for (i = 0; i < 2; i++) {
if (pipe_rw[i] == STDERR_FILENO) {
pipe_rw[i] = dup(old_fd = pipe_rw[i]);
if (pipe_rw[i] < 0)
eprintf("dup:");
close(old_fd);
}
}
pid = fork();
if (pid < 0)
eprintf("fork:");
if (!pid) {
close(pipe_rw[0]);
if (dup2(pipe_rw[1], STDOUT_FILENO) < 0)
eprintf("dup2:");
close(pipe_rw[1]);
/* XXX Is there a way to convert directly to raw XYZ? (Would avoid gamut truncation) */
execlp("convert", "convert", "-", "-depth", "32", "-alpha", "activate", "pam:-", NULL);
eprintf("exec convert:");
}
close(pipe_rw[1]);
after_fork:
if (farbfeld) {
for (ptr = 0; ptr < 16; ptr++) {
r = read(pipe_rw[0], buf + ptr, sizeof(buf) - ptr);
if (r < 0)
eprintf("read %s:", file);
if (r == 0)
eprintf("%s\n", conv_fail_msg);
ptr += (size_t)r;
}
if (memcmp(buf, "farbfeld", 8))
eprintf("%s\n", conv_fail_msg);
sprintf(width, "%"PRIu32, ntohl(*(uint32_t *)(buf + 8)));
sprintf(height, "%"PRIu32, ntohl(*(uint32_t *)(buf + 12)));
ptr = 0;
goto header_done;
}
for (ptr = 0;;) {
r = read(pipe_rw[0], buf + ptr, sizeof(buf) - ptr);
if (r < 0)
eprintf("read %s:", file);
if (r == 0)
eprintf("%s\n", conv_fail_msg);
ptr += (size_t)r;
for (;;) {
p = memchr(buf, '\n', ptr);
if (!p) {
if (ptr == sizeof(buf))
eprintf("%s\n", conv_fail_msg);
break;
}
*p++ = '\0';
if (strstr(buf, "WIDTH ") == buf) {
if (*width || !buf[6] || strlen(buf + 6) >= sizeof(width))
eprintf("%s\n", conv_fail_msg);
strcpy(width, buf + 6);
} else if (strstr(buf, "HEIGHT ") == buf) {
if (*height || !buf[7] || strlen(buf + 7) >= sizeof(height))
eprintf("%s\n", conv_fail_msg);
strcpy(height, buf + 7);
} else if (!strcmp(buf, "ENDHDR")) {
memmove(buf, p, ptr -= (size_t)(p - buf));
goto header_done;
}
memmove(buf, p, ptr -= (size_t)(p - buf));
}
}
header_done:
n = ptr;
if (!*width || !*height)
eprintf("%s\n", conv_fail_msg);
if (!headless) {
printf("1 %s %s xyza\n%cuivf", width, height, 0);
efflush(stdout, "<stdout>");
}
for (;;) {
for (ptr = 0; ptr + 15 < n; ptr += 16) {
red = get_value(buf + ptr + 0);
green = get_value(buf + ptr + 4);
blue = get_value(buf + ptr + 8);
pixel[3] = get_value(buf + ptr + 12);
srgb_to_ciexyz(red, green, blue, pixel + 0, pixel + 1, pixel + 2);
ewriteall(STDOUT_FILENO, pixel, sizeof(pixel), "<stdout>");
}
r = read(pipe_rw[0], buf, sizeof(buf));
if (r < 0)
eprintf("read %s:", file);
if (r == 0)
break;
n = (size_t)r;
}
if (farbfeld || pam)
return 0;
close(pipe_rw[0]);
while (waitpid(pid, &status, 0) != pid);
return !!status;
}
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