void integral_image(t_image *image)
{
init_integral_image(image);
image->integral[0][0] = getgrey(image->bw, 0, 0);
for (int i = 1; i < image->bw->w; ++i)
image->integral[0][i] = image->integral[0][i-1] + getgrey(image->bw, i, 0);
for (int i = 1; i < image->bw->h; ++i)
image->integral[i][0] = image->integral[i-1][0] + getgrey(image->bw, 0, i);
for (int y = 1; y < image->bw->h; ++y)
for (int x = 1; x < image->bw->w; ++x)
image->integral[y][x] = getgrey(image->bw, x, y) + image->integral[y - 1][x] + image->integral[y][x - 1] - image->integral[y - 1][x - 1];
}
int
main(
int argc,
char *argv[]
)
{
struct hdStruct head;
int dither = 1;
int reverse = 0;
int ncolors = 256;
int greyscale = 0;
int i;
SET_DEFAULT_BINARY();
SET_FILE_BINARY(stdin);
SET_FILE_BINARY(stdout);
progname = argv[0];
samplefac = 0;
for (i = 1; i < argc; i++)
if (argv[i][0] == '-')
switch (argv[i][1]) {
case 'd':
dither = !dither;
break;
case 'g':
gamv = atof(argv[++i]);
break;
case 'r':
reverse = !reverse;
break;
case 'b':
greyscale = 1;
break;
case 'e':
if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
goto userr;
bradj = atoi(argv[++i]);
break;
case 'c':
ncolors = atoi(argv[++i]);
break;
case 'n':
samplefac = atoi(argv[++i]);
break;
default:
goto userr;
}
else
break;
if (i < argc-2)
goto userr;
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
sprintf(errmsg, "cannot open input \"%s\"", argv[i]);
quiterr(errmsg);
}
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
sprintf(errmsg, "cannot open output \"%s\"", argv[i+1]);
quiterr(errmsg);
}
if (reverse) {
/* get header */
if (getthead(&head, NULL, stdin) < 0)
quiterr("bad targa file");
if (!goodpic(&head))
quiterr("incompatible format");
xmax = head.x;
ymax = head.y;
/* put header */
newheader("RADIANCE", stdout);
printargs(i, argv, stdout);
fputformat(COLRFMT, stdout);
putchar('\n');
fprtresolu(xmax, ymax, stdout);
/* convert file */
tg2ra(&head);
} else {
if (getrhead(&head, stdin) < 0)
quiterr("bad Radiance input");
/* write header */
putthead(&head, NULL, stdout);
/* convert file */
if (greyscale)
getgrey(ncolors);
else
getmapped(ncolors, dither);
/* write data */
writetarga(&head, tarData, stdout);
}
quiterr(NULL);
userr:
fprintf(stderr,
"Usage: %s [-d][-n samp][-c ncolors][-b][-g gamv][-e +/-stops] input [output]\n",
progname);
fprintf(stderr, " Or: %s -r [-g gamv][-e +/-stops] [input [output]]\n",
progname);
exit(1);
}
