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/* See LICENSE file for copyright and license details. */
#include "stream.h"
#include "util.h"
#include <arpa/inet.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
USAGE("[-d depth | -f]")
static int luma_warning_triggered = 0;
static int gamut_warning_triggered = 0;
static int alpha_warning_triggered = 0;
static unsigned long long int max;
static int bytes;
static void
write_pixel(double R, double G, double B, double A)
{
unsigned long long int colours[4];
unsigned char buf[4 * 8];
int i, j, k, bm = bytes - 1;
if (R < 0 || G < 0 || B < 0 || R > 1 || G > 1 || B > 1) {
if (gamut_warning_triggered) {
gamut_warning_triggered = 1;
weprintf("warning: out-of-gamut colour detected\n");
}
; /* TODO gamut */
R = CLIP(0, R, 1);
G = CLIP(0, G, 1);
B = CLIP(0, B, 1);
}
if (A < 0 || A > 1) {
if (alpha_warning_triggered) {
alpha_warning_triggered = 1;
weprintf("warning: alpha values truncated\n");
}
A = A < 0 ? 0 : 1;
}
colours[0] = srgb_encode(R) * max + 0.5;
colours[1] = srgb_encode(G) * max + 0.5;
colours[2] = srgb_encode(B) * max + 0.5;
colours[3] = A * max + 0.5;
for (i = k = 0; i < 4; i++, k += bytes) {
for (j = 0; j < bytes; j++) {
buf[k + bm - j] = (unsigned char)(colours[i]);
colours[i] >>= 8;
}
}
ewriteall(STDOUT_FILENO, buf, k, "<stdout>");
}
static void
process_xyza(struct stream *stream, size_t n)
{
size_t i;
double X, Y, Z, A, R, G, B;
for (i = 0; i < n; i += stream->pixel_size) {
X = ((double *)(stream->buf + i))[0];
Y = ((double *)(stream->buf + i))[1];
Z = ((double *)(stream->buf + i))[2];
A = ((double *)(stream->buf + i))[3];
if (Y < 0 || Y > 1) {
if (luma_warning_triggered) {
luma_warning_triggered = 1;
weprintf("warning: %s colour detected\n",
Y < 0 ? "subblack" : "superwhite");
}
}
ciexyz_to_srgb(X, Y, Z, &R, &G, &B);
write_pixel(R, G, B, A);
}
}
int
main(int argc, char *argv[])
{
struct stream stream;
int depth = 16, farbfeld = 0;
void (*process)(struct stream *stream, size_t n);
ARGBEGIN {
case 'd':
depth = etoi_flag('d', UARGF(), 1, 64);
break;
case 'f':
farbfeld = 1;
break;
default:
usage();
} ARGEND;
if (argc || (farbfeld && depth != 16))
usage();
eopen_stream(&stream, NULL);
max = 1ULL << (depth - 1);
max |= max - 1;
bytes = (depth + 7) / 8;
if (!strcmp(stream.pixfmt, "xyza"))
process = process_xyza;
else
eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt);
if (farbfeld) {
uint32_t width = stream.width, height = stream.height;
if (stream.width > UINT32_MAX)
eprintf("%s: frame is too wide\n", stream.file);
if (stream.height > UINT32_MAX)
eprintf("%s: frame is too tall\n", stream.file);
printf("farbfeld");
memmove(stream.buf + 8, stream.buf, stream.ptr);
stream.ptr += 8;
width = htonl(width);
height = htonl(height);
memcpy(stream.buf + 0, &width, 4);
memcpy(stream.buf + 4, &height, 4);
} else {
printf("P7\n"
"WIDTH %zu\n"
"HEIGHT %zu\n"
"DEPTH 4\n" /* channels */
"MAXVAL %llu\n"
"TUPLTYPE RGB_ALPHA\n"
"ENDHDR\n", stream.width, stream.height, max);
}
efflush(stdout, "<stdout>");
process_stream(&stream, process);
return 0;
}
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