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/* See LICENSE file for copyright and license details. */
#include "common.h"
USAGE("[-xy] mosaic-stream")
static int tiled_x = 0;
static int tiled_y = 0;
#define TEST(X, Y)\
(!*(size_t *)(img + (Y) * mosaic->width + (X)) &&\
mos[(Y) * mosaic->width + (X)][0] == ch1 &&\
mos[(Y) * mosaic->width + (X)][1] == ch2 &&\
mos[(Y) * mosaic->width + (X)][2] == ch3 &&\
mos[(Y) * mosaic->width + (X)][3] == ch4)
#define SEARCH(TYPE, SEARCH_FUNCTION)\
do {\
typedef TYPE pixel_t[4];\
\
pixel_t *restrict mos = (pixel_t *)mbuf;\
pixel_t *restrict img = (pixel_t *)output;\
size_t n, s, e, w;\
\
*(size_t *)(img + y * mosaic->width + x) = index;\
\
n = y ? y - 1 : tiled_y ? mosaic->height - 1 : y;\
s = y <= mosaic->height ? y + 1 : tiled_y ? 0 : y;\
w = x ? x - 1 : tiled_x ? mosaic->width - 1 : x;\
e = x <= mosaic->width ? x + 1 : tiled_x ? 0 : x;\
\
if (TEST(x, n)) SEARCH_FUNCTION(output, mbuf, mosaic, x, n, index, ch1, ch2, ch3, ch4);\
if (TEST(x, s)) SEARCH_FUNCTION(output, mbuf, mosaic, x, s, index, ch1, ch2, ch3, ch4);\
if (TEST(e, y)) SEARCH_FUNCTION(output, mbuf, mosaic, e, y, index, ch1, ch2, ch3, ch4);\
if (TEST(w, y)) SEARCH_FUNCTION(output, mbuf, mosaic, w, y, index, ch1, ch2, ch3, ch4);\
} while (0)\
#define PROCESS(TYPE, SEARCH_FUNCTION)\
do {\
typedef TYPE pixel_t[4];\
\
static pixel_t *avg = NULL;\
static TYPE *cnt = NULL;\
static size_t size = 0;\
\
pixel_t *restrict clr = (pixel_t *)cbuf;\
pixel_t *restrict mos = (pixel_t *)mbuf;\
pixel_t *img = (pixel_t *)output;\
size_t index = 0;\
size_t x, y, i;\
\
memset(img, 0, mosaic->frame_size);\
\
for (y = 0; y < mosaic->height; y++)\
for (x = 0; x < mosaic->width; x++)\
if (!*(size_t *)(img + y * mosaic->width + x))\
SEARCH_FUNCTION(img, mos, mosaic, x, y, ++index,\
mos[y * mosaic->width + x][0],\
mos[y * mosaic->width + x][1],\
mos[y * mosaic->width + x][2],\
mos[y * mosaic->width + x][3]);\
\
if (index > size) {\
size = index;\
avg = erealloc2(avg, size, sizeof(*avg));\
cnt = erealloc2(cnt, size, sizeof(*cnt));\
}\
memset(avg, 0, index * sizeof(*avg));\
memset(cnt, 0, index * sizeof(*cnt));\
\
for (y = 0; y < mosaic->height; y++) {\
for (x = 0; x < mosaic->width; x++) {\
i = y * mosaic->width + x;\
index = *(size_t *)(img + i) - 1;\
cnt[index] += (TYPE)1;\
avg[index][0] *= (cnt[index] - (TYPE)1) / cnt[index];\
avg[index][1] *= (cnt[index] - (TYPE)1) / cnt[index];\
avg[index][2] *= (cnt[index] - (TYPE)1) / cnt[index];\
avg[index][3] *= (cnt[index] - (TYPE)1) / cnt[index];\
avg[index][3] += clr[i][3] /= cnt[index];\
avg[index][0] += clr[i][0] *= clr[i][3];\
avg[index][1] += clr[i][1] *= clr[i][3];\
avg[index][2] += clr[i][2] *= clr[i][3];\
}\
}\
\
for (i = 0; i < index; i++) {\
if (avg[i][3]) {\
avg[i][0] /= avg[i][3];\
avg[i][1] /= avg[i][3];\
avg[i][2] /= avg[i][3];\
}\
}\
\
for (y = 0; y < mosaic->height; y++) {\
for (x = 0; x < mosaic->width; x++) {\
i = y * mosaic->width + x;\
index = *(size_t *)(img + i) - 1;\
img[i][0] = avg[index][0];\
img[i][1] = avg[index][1];\
img[i][2] = avg[index][2];\
img[i][3] = avg[index][3];\
}\
}\
\
(void) colour;\
} while (0)
static void
search_lf(void *restrict output, void *restrict mbuf, struct stream *mosaic,
size_t x, size_t y, size_t index, double ch1, double ch2, double ch3, double ch4)
{
SEARCH(double, search_lf);
}
static void
search_f(void *restrict output, void *restrict mbuf, struct stream *mosaic,
size_t x, size_t y, size_t index, float ch1, float ch2, float ch3, float ch4)
{
SEARCH(float, search_f);
}
static void
process_lf(char *restrict output, char *restrict cbuf, char *restrict mbuf,
struct stream *colour, struct stream *mosaic)
{
PROCESS(double, search_lf);
}
static void
process_f(char *restrict output, char *restrict cbuf, char *restrict mbuf,
struct stream *colour, struct stream *mosaic)
{
PROCESS(float, search_f);
}
int
main(int argc, char *argv[])
{
struct stream colour, mosaic;
void (*process)(char *restrict output, char *restrict cbuf, char *restrict mbuf,
struct stream *colour, struct stream *mosaic);
ARGBEGIN {
case 'x':
tiled_x = 1;
break;
case 'y':
tiled_y = 1;
break;
default:
usage();
} ARGEND;
if (argc != 1)
usage();
eopen_stream(&colour, NULL);
eopen_stream(&mosaic, argv[0]);
SELECT_PROCESS_FUNCTION(&colour);
echeck_compat(&colour, &mosaic);
fprint_stream_head(stdout, &colour);
efflush(stdout, "<stdout>");
process_each_frame_two_streams(&colour, &mosaic, STDOUT_FILENO, "<stdout>", process);
return 0;
}
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