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/* See LICENSE file for copyright and license details. */
#include "common.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;
#define WRITE_PIXEL(TYPE)\
do {\
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] = (unsigned long long int)(srgb_encode(R) * (TYPE)max + (TYPE)0.5);\
colours[1] = (unsigned long long int)(srgb_encode(G) * (TYPE)max + (TYPE)0.5);\
colours[2] = (unsigned long long int)(srgb_encode(B) * (TYPE)max + (TYPE)0.5);\
colours[3] = (unsigned long long int)(A * (TYPE)max + (TYPE)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, (size_t)k, "<stdout>");\
} while (0)
#define PROCESS(TYPE, SUFFIX)\
do {\
size_t i;\
TYPE X, Y, Z, A, R, G, B;\
for (i = 0; i < n; i += stream->pixel_size) {\
X = ((TYPE *)(stream->buf + i))[0];\
Y = ((TYPE *)(stream->buf + i))[1];\
Z = ((TYPE *)(stream->buf + i))[2];\
A = ((TYPE *)(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##SUFFIX(R, G, B, A);\
}\
} while (0)
static void write_pixel_d(double R, double G, double B, double A) {WRITE_PIXEL(double);}
static void write_pixel_f(float R, float G, float B, float A) {WRITE_PIXEL(float);}
static void process_xyza (struct stream *stream, size_t n) {PROCESS(double, _d);}
static void process_xyzaf(struct stream *stream, size_t n) {PROCESS(float, _f);}
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 if (!strcmp(stream.pixfmt, "xyza f"))
process = process_xyzaf;
else
eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt);
if (farbfeld) {
uint32_t width = (uint32_t)(stream.width);
uint32_t height = (uint32_t)(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);
width = htonl(width);
height = htonl(height);
ewriteall(STDOUT_FILENO, "farbfeld", 8, "<stdout>");
ewriteall(STDOUT_FILENO, &width, 4, "<stdout>");
ewriteall(STDOUT_FILENO, &height, 4, "<stdout>");
} 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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