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/* See LICENSE file for copyright and license details. */
#include "common.h"
USAGE("[-xy]")
int
main(int argc, char *argv[])
{
int tiled_x = 0;
int tiled_y = 0;
struct stream stream;
void *colours[2];
char *buf;
char *edges;
char *here;
size_t i, n, x, y;
int v;
ARGBEGIN {
case 'x':
tiled_x = 1;
break;
case 'y':
tiled_y = 1;
break;
default:
usage();
} ARGEND;
if (argc)
usage();
eopen_stream(&stream, NULL);
echeck_dimensions(&stream, WIDTH | HEIGHT, NULL);
n = stream.width * stream.height;
buf = emalloc(stream.frame_size);
edges = emalloc((n + 7) / 8);
colours[0] = alloca(stream.pixel_size);
colours[1] = alloca(stream.pixel_size);
memset(colours[0], 0, stream.pixel_size);
if (!strcmp(stream.pixfmt, "xyza")) {
((double *)(colours[1]))[0] = (double)1;
((double *)(colours[1]))[1] = (double)1;
((double *)(colours[1]))[2] = (double)1;
((double *)(colours[1]))[3] = (double)1;
} else if (!strcmp(stream.pixfmt, "xyza f")) {
((float *)(colours[1]))[0] = (float)1;
((float *)(colours[1]))[1] = (float)1;
((float *)(colours[1]))[2] = (float)1;
((float *)(colours[1]))[3] = (float)1;
} else {
eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt);
}
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
while (eread_frame(&stream, buf)) {
memset(edges, 0, (n + 7) / 8);
for (i = 0; i < n; i++) {
here = buf + i * stream.pixel_size;
x = i % stream.width;
y = i / stream.width;
if (x != stream.width - 1 &&
memcmp(here + stream.pixel_size, here, stream.pixel_size))
goto at_edge;
if (tiled_x && x == stream.width - 1 &&
memcmp(here + stream.pixel_size - stream.row_size, here, stream.pixel_size))
goto at_edge;
if (x &&
memcmp(here - stream.pixel_size, here, stream.pixel_size))
goto at_edge;
if (tiled_x && !x &&
memcmp(here + stream.row_size - stream.pixel_size, here, stream.pixel_size))
goto at_edge;
if (y != stream.height - 1 &&
memcmp(here + stream.row_size, here, stream.pixel_size))
goto at_edge;
if (tiled_y && y == stream.height - 1 &&
memcmp(here + stream.row_size - stream.frame_size, here, stream.pixel_size))
goto at_edge;
if (y &&
memcmp(here - stream.row_size, here, stream.pixel_size))
goto at_edge;
if (tiled_y && !y &&
memcmp(here + stream.frame_size - stream.row_size, here, stream.pixel_size))
goto at_edge;
continue;
at_edge:
edges[i >> 3] |= 1 << (i & 7);
}
for (i = 0; i < n; i++) {
v = (edges[i >> 3] >> (i & 7)) & 1;
memcpy(buf + i * stream.pixel_size, colours[v], stream.pixel_size);
}
ewriteall(STDOUT_FILENO, buf, stream.frame_size, "<stdout>");
}
free(buf);
free(edges);
return 0;
}
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