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/* See LICENSE file for copyright and license details. */
#include "common.h"
USAGE("[-F pixel-format] block-diameter")
#define SET_XYZA(TYPE)\
(colours = alloca(4 * stream.pixel_size),\
((TYPE *)colours)[ 0] = (TYPE)0.412457445582367600,\
((TYPE *)colours)[ 1] = (TYPE)0.212673370378408280,\
((TYPE *)colours)[ 2] = (TYPE)0.019333942761673460,\
((TYPE *)colours)[ 3] = (TYPE)1,\
((TYPE *)colours)[ 4] = (TYPE)0.770033310827883400,\
((TYPE *)colours)[ 5] = (TYPE)0.927825100869440000,\
((TYPE *)colours)[ 6] = (TYPE)0.138525897843512050,\
((TYPE *)colours)[ 7] = (TYPE)1,\
((TYPE *)colours)[ 8] = (TYPE)0.357575865245515900,\
((TYPE *)colours)[ 9] = (TYPE)0.715151730491031800,\
((TYPE *)colours)[10] = (TYPE)0.119191955081838600,\
((TYPE *)colours)[11] = (TYPE)1,\
((TYPE *)colours)[12] = (TYPE)D65_XYZ_X,\
((TYPE *)colours)[13] = (TYPE)1.0000,\
((TYPE *)colours)[14] = (TYPE)D65_XYZ_Z,\
((TYPE *)colours)[15] = (TYPE)1)
static struct stream stream = { .width = 0, .height = 0, .frames = 1 };
int
main(int argc, char *argv[])
{
size_t diameter;
const char *pixfmt = "xyza";
char *colours;
size_t x, y, y2;
int k;
ARGBEGIN {
case 'F':
pixfmt = UARGF();
break;
default:
usage();
} ARGEND;
if (argc != 1)
usage();
diameter = etozu_arg("block-diameter", argv[0], 1, SIZE_MAX);
eset_pixfmt(&stream, pixfmt);
CHECK_N_CHAN(&stream, 4, 4);
if (stream.encoding == DOUBLE)
SET_XYZA(double);
else if (stream.encoding == FLOAT)
SET_XYZA(float);
else
eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt);
stream.width = (size_t)((double)diameter * sqrt(3.));
stream.height = diameter * 3 / 2;
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
for (y = 0; y < stream.height; y++) {
for (x = 0; x < stream.width; x++) {
if (y * 4 < diameter) {
switch (x * 4 / stream.width) {
case 0:
k = 2 * (4 * x * diameter < stream.width * diameter - 4 * y * stream.width);
break;
case 1:
k = 3 * (4 * x * diameter - stream.width * diameter > 4 * y * stream.width);
break;
case 2:
k = 1 + 2 * (3 * diameter * stream.width - 4 * x * diameter > 4 * y * stream.width);
break;
default:
k = 1 + (4 * x * diameter - 3 * stream.width * diameter > 4 * y * stream.width);
break;
}
} else if (y * 4 < diameter * 3) {
k = (x * 2 >= stream.width);
} else if (y < diameter) {
y2 = diameter - y;
switch (x * 4 / stream.width) {
case 0:
k = 2 * (4 * x * diameter < stream.width * diameter - 4 * y2 * stream.width);
break;
case 1:
k = 3 * (4 * x * diameter - stream.width * diameter > 4 * y2 * stream.width);
break;
case 2:
k = 1 + 2 * (3 * diameter * stream.width - 4 * x * diameter > 4 * y2 * stream.width);
break;
default:
k = 1 + (4 * x * diameter - 3 * stream.width * diameter > 4 * y2 * stream.width);
break;
}
} else {
k = (stream.width <= x * 4 && x * 4 < stream.width * 3) + 2;
}
ewriteall(STDOUT_FILENO, colours + (size_t)k * stream.pixel_size, stream.pixel_size, "<stdout>");
}
}
return 0;
}
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