int process(char *fname, int components, int z_lookup, unsigned char *startbuf, unsigned char *endbuf, int z_draw, int x_draw, int y_draw, struct graphics *gc, int mapbits, int metabits, int dump, int gps, struct color_range *colors, int xoff, int yoff) {
int bytes = bytesfor(mapbits, metabits, components, z_lookup);
int ret = 0;
char fn[strlen(fname) + 1 + 5 + 1 + 5 + 1];
struct tilecontext tc;
tc.z = z_draw;
tc.x = x_draw;
tc.y = y_draw;
tc.xoff = xoff;
tc.yoff = yoff;
if (components == 1) {
sprintf(fn, "%s/1,0", fname);
} else {
sprintf(fn, "%s/%d,%d", fname, components, z_lookup);
}
int fd = open(fn, O_RDONLY);
if (fd < 0) {
// perror(fn);
return ret;
}
struct stat st;
if (fstat(fd, &st) < 0) {
perror("stat");
exit(EXIT_FAILURE);
}
unsigned char *map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (map == MAP_FAILED) {
perror("mmap");
exit(EXIT_FAILURE);
}
gSortBytes = bytes;
unsigned char *start = search(startbuf, map, st.st_size / bytes, bytes, bufcmp);
unsigned char *end = search(endbuf, map, st.st_size / bytes, bytes, bufcmp);
end += bytes; // points to the last value in range; need the one after that
if (memcmp(start, startbuf, bytes) < 0) {
start += bytes; // if not exact match, points to element before match
}
int step = 1;
double brush = 1;
double thick = line_thick;
double bright1;
if (components == 1) {
bright1 = dot_bright;
if (z_draw > dot_base) {
step = 1;
brush = exp(log(2.0) * (z_draw - dot_base));
bright1 *= exp(log(dot_ramp) * (z_draw - dot_base));
} else {
step = floor(exp(log(exponent) * (dot_base - z_draw)) + .5);
bright1 *= exp(log(dot_ramp) * (z_draw - dot_base));
bright1 = bright1 * step / (1 << (dot_base - z_draw));
}
bright1 /= point_size;
brush *= point_size;
} else {
bright1 = dot_bright * line_per_dot / line_thick;
if (line_ramp >= 1) {
thick *= exp(log(line_ramp) * (z_draw - dot_base));
bright1 *= exp(log(dot_ramp / line_ramp) * (z_draw - dot_base));
} else {
bright1 *= exp(log(dot_ramp) * (z_draw - dot_base));
}
}
if (mercator >= 0) {
double lat, lon;
tile2latlon((x_draw + .5) * (1LL << (32 - z_draw)),
(y_draw + .5) * (1LL << (32 - z_draw)),
32, &lat, &lon);
double rat = cos(lat * M_PI / 180);
double base = cos(mercator * M_PI / 180);
brush /= rat * rat / (base * base);
}
if (dump) {
step = 1;
} else {
// Align to step size so each zoom is a superset of the previous
start = (start - map + (step * bytes - 1)) / (step * bytes) * (step * bytes) + map;
}
double size = cloudsize(z_draw, x_draw, y_draw);
int innerstep = 1;
long long todo = 0;
size *= tilesize; // convert to pixels
if (circle > 0) {
// An additional 4 zoom levels without skipping
// XXX Why 4?
if (step > 1 && size > .0625) {
innerstep = step;
step = 1;
}
}
const double b = brush * (tilesize / 256.0) * (tilesize / 256.0);
for (; start < end; start += step * bytes) {
unsigned int x[components], y[components];
double xd[components], yd[components];
int k;
unsigned long long meta = 0;
buf2xys(start, mapbits, metabits, z_lookup, components, x, y, &meta);
if (meta > maxmeta) {
continue;
}
if (!dump && z_draw >= mapbits / 2 - 8) {
// Add noise below the bottom of the file resolution
// so that it looks less gridded when overzoomed
int j;
for (j = 0; j < components; j++) {
int noisebits = 32 - mapbits / 2;
int i;
for (i = 0; i < noisebits; i++) {
x[j] |= ((y[j] >> (2 * noisebits - 1 - i)) & 1) << i;
y[j] |= ((x[j] >> (2 * noisebits - 1 - i)) & 1) << i;
}
}
}
double hue = -1;
if (metabits > 0 && colors->active) {
hue = (((double) meta - colors->meta1) / (colors->meta2 - colors->meta1) * (colors->hue2 - colors->hue1) + colors->hue1) / 360;
if (hue < -2) {
hue = -1;
} else {
while (hue < 0) {
hue++;
}
while (hue > 1) {
hue--;
}
}
}
double bright = bright1;
double bb = b;
if (metabright) {
bright *= meta;
}
if (metabrush) {
bb = bb * meta;
}
for (k = 0; k < components; k++) {
wxy2fxy(x[k], y[k], &xd[k], &yd[k], z_draw, x_draw, y_draw);
}
if (dump) {
int should = 0;
if (components == 1) {
should = 1;
} else {
for (k = 1; k < components; k++) {
double x1 = xd[k - 1];
double y1 = yd[k - 1];
double x2 = xd[k];
double y2 = yd[k];
if (clip(&x1, &y1, &x2, &y2, 0, 0, 1, 1)) {
should = 1;
break;
}
}
}
if (should) {
dump_out(dump, x, y, components, metabits, meta);
}
} else if (components == 1) {
if (!antialias) {
xd[0] = ((int) (xd[0] * tilesize) + .5) / tilesize;
yd[0] = ((int) (yd[0] * tilesize) + .5) / tilesize;
}
if (circle > 0) {
if (size < .5) {
if (bb <= 1) {
drawPixel((xd[0] * tilesize - .5) + xoff, (yd[0] * tilesize - .5) + yoff, gc, bright * bb * meta / innerstep, hue, meta, &tc);
} else {
drawBrush((xd[0] * tilesize) + xoff, (yd[0] * tilesize) + yoff, gc, bright * meta / innerstep, bb, hue, meta, gaussian, &tc);
ret = 1;
}
} else {
double xc = (xd[0] * tilesize) + xoff;
double yc = (yd[0] * tilesize) + yoff;
if (xc + size >= 0 &&
yc + size >= 0 &&
xc - size <= tilesize &&
yc - size <= tilesize) {
srand(x[0] * 37 + y[0]);
for (todo += meta; todo > 0; todo -= innerstep) {
double r = sqrt(((double) (rand() & (INT_MAX - 1))) / (INT_MAX));
double ang = ((double) (rand() & (INT_MAX - 1))) / (INT_MAX) * 2 * M_PI;
double xp = xc + size * r * cos(ang);
double yp = yc + size * r * sin(ang);
if (bb <= 1) {
drawPixel(xp - .5, yp - .5, gc, bright * bb, hue, meta, &tc);
} else {
drawBrush(xp, yp, gc, bright, bb, hue, meta, gaussian, &tc);
ret = 1;
}
}
}
}
} else {
if (bb <= 1) {
drawPixel((xd[0] * tilesize - .5) + xoff, (yd[0] * tilesize - .5) + yoff, gc, bright * bb, hue, meta, &tc);
} else {
drawBrush((xd[0] * tilesize) + xoff, (yd[0] * tilesize) + yoff, gc, bright, bb, hue, meta, gaussian, &tc);
ret = 1;
}
}
} else {
for (k = 1; k < components; k++) {
double bright1 = bright;
long long xk1 = x[k - 1];
long long xk = x[k];
if (gps) {
double xdist = (long long) x[k] - (long long) x[k - 1];
double ydist = (long long) y[k] - (long long) y[k - 1];
double dist = sqrt(xdist * xdist + ydist * ydist);
double min = gps_dist;
min = min * exp(log(gps_ramp) * (gps_base - z_draw));
if (dist > min) {
bright1 /= (dist / min);
}
if (bright1 < .0025) {
continue;
}
}
double thick1 = thick * tilesize / 256.0;
if (xk - xk1 >= (1LL << 31)) {
wxy2fxy(xk - (1LL << 32), y[k], &xd[k], &yd[k], z_draw, x_draw, y_draw);
drawClip(xd[k - 1] * tilesize + xoff, yd[k - 1] * tilesize + yoff, xd[k] * tilesize + xoff, yd[k] * tilesize + yoff, gc, bright1, hue, meta, antialias, thick1, &tc);
wxy2fxy(x[k], y[k], &xd[k], &yd[k], z_draw, x_draw, y_draw);
wxy2fxy(xk1 + (1LL << 32), y[k - 1], &xd[k - 1], &yd[k - 1], z_draw, x_draw, y_draw);
drawClip(xd[k - 1] * tilesize + xoff, yd[k - 1] * tilesize + yoff, xd[k] * tilesize + xoff, yd[k] * tilesize + yoff, gc, bright1, hue, meta, antialias, thick1, &tc);
wxy2fxy(x[k - 1], y[k - 1], &xd[k - 1], &yd[k - 1], z_draw, x_draw, y_draw);
} else if (xk1 - xk >= (1LL << 31)) {
wxy2fxy(xk1 - (1LL << 32), y[k - 1], &xd[k - 1], &yd[k - 1], z_draw, x_draw, y_draw);
drawClip(xd[k - 1] * tilesize + xoff, yd[k - 1] * tilesize + yoff, xd[k] * tilesize + xoff, yd[k] * tilesize + yoff, gc, bright1, hue, meta, antialias, thick1, &tc);
wxy2fxy(x[k - 1], y[k - 1], &xd[k - 1], &yd[k - 1], z_draw, x_draw, y_draw);
wxy2fxy(xk + (1LL << 32), y[k], &xd[k], &yd[k], z_draw, x_draw, y_draw);
drawClip(xd[k - 1] * tilesize + xoff, yd[k - 1] * tilesize + yoff, xd[k] * tilesize + xoff, yd[k] * tilesize + yoff, gc, bright1, hue, meta, antialias, thick1, &tc);
wxy2fxy(x[k], y[k], &xd[k], &yd[k], z_draw, x_draw, y_draw);
} else {
drawClip(xd[k - 1] * tilesize + xoff, yd[k - 1] * tilesize + yoff, xd[k] * tilesize + xoff, yd[k] * tilesize + yoff, gc, bright1, hue, meta, antialias, thick1, &tc);
}
}
}
}
int process(char *fname, int components, int z_lookup, unsigned char *startbuf, unsigned char *endbuf, int z_draw, int x_draw, int y_draw, double *image, double *cx, double *cy, int mapbits, int metabits, int dump, int gps, int colors) {
int bytes = bytesfor(mapbits, metabits, components, z_lookup);
int ret = 0;
char fn[strlen(fname) + 1 + 5 + 1 + 5 + 1];
if (components == 1) {
sprintf(fn, "%s/1,0", fname);
} else {
sprintf(fn, "%s/%d,%d", fname, components, z_lookup);
}
int fd = open(fn, O_RDONLY);
if (fd < 0) {
perror(fn);
return ret;
}
struct stat st;
if (fstat(fd, &st) < 0) {
perror("stat");
exit(EXIT_FAILURE);
}
unsigned char *map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (map == MAP_FAILED) {
perror("mmap");
exit(EXIT_FAILURE);
}
gSortBytes = bytes;
unsigned char *start = search(startbuf, map, st.st_size / bytes, bytes, bufcmp);
unsigned char *end = search(endbuf, map, st.st_size / bytes, bytes, bufcmp);
end += bytes; // points to the last value in range; need the one after that
if (memcmp(start, startbuf, bytes) < 0) {
start += bytes; // if not exact match, points to element before match
}
int step = 1;
double brush = 1;
double bright1;
if (components == 1) {
bright1 = dot_bright;
if (z_draw > dot_base) {
step = 1;
brush = 1 << (multiplier * (z_draw - dot_base));
} else {
step = 1 << (multiplier * (dot_base - z_draw));
}
bright1 *= exp(log(dot_ramp) * (z_draw - dot_base));
} else {
bright1 = dot_bright * line_per_dot;
bright1 *= exp(log(dot_ramp) * (z_draw - dot_base));
}
if (dump) {
step = 1;
} else {
// Align to step size so each zoom is a superset of the previous
start = (start - map) / (step * bytes) * (step * bytes) + map;
}
for (; start < end; start += step * bytes) {
unsigned int x[components], y[components];
double xd[components], yd[components];
int k;
unsigned int meta = 0;
buf2xys(start, mapbits, metabits, z_lookup, components, x, y, &meta);
if (!dump && z_draw >= mapbits / 2 - 8) {
// Add noise below the bottom of the file resolution
// so that it looks less gridded when overzoomed
int j;
for (j = 0; j < components; j++) {
int noisebits = 32 - mapbits / 2;
int i;
for (i = 0; i < noisebits; i++) {
x[j] |= ((y[j] >> (2 * noisebits - 1 - i)) & 1) << i;
y[j] |= ((x[j] >> (2 * noisebits - 1 - i)) & 1) << i;
}
}
}
double hue = -1;
if (metabits > 0 && colors > 0) {
hue = (double) meta / colors;
}
double bright = bright1;
if (mercator >= 0) {
double lat, lon;
tile2latlon(x[0], y[0], 32, &lat, &lon);
double rat = cos(lat * M_PI / 180);
double base = cos(mercator * M_PI / 180);
bright /= rat * rat / (base * base);
}
for (k = 0; k < components; k++) {
wxy2fxy(x[k], y[k], &xd[k], &yd[k], z_draw, x_draw, y_draw);
}
if (dump) {
int should = 0;
if (components == 1) {
should = 1;
} else {
for (k = 1; k < components; k++) {
if (drawClip(xd[k - 1], yd[k - 1], xd[k], yd[k], NULL, NULL, NULL, 0, 0, 0)) {
should = 1;
break;
}
}
}
if (should) {
for (k = 0; k < components; k++) {
double lat, lon;
tile2latlon(x[k], y[k], 32, &lat, &lon);
printf("%lf,%lf ", lat, lon);
}
if (metabits != 0) {
printf("%d:%d ", metabits, meta);
}
printf("// ");
for (k = 0; k < components; k++) {
printf("%08x %08x ", x[k], y[k]);
}
printf("\n");
}
} else if (components == 1) {
if (!antialias) {
xd[0] = (int) xd[0] + .5;
yd[0] = (int) yd[0] + .5;
}
if (brush <= 1) {
drawPixel(xd[0] - .5, yd[0] - .5, image, cx, cy, bright * brush, hue);
} else {
drawBrush(xd[0], yd[0], image, cx, cy, bright, brush, hue);
ret = 1;
}
} else {
for (k = 1; k < components; k++) {
double bright1 = bright;
long long xk1 = x[k - 1];
long long xk = x[k];
if (gps) {
double xdist = (long long) x[k] - (long long) x[k - 1];
double ydist = (long long) y[k] - (long long) y[k - 1];
double dist = sqrt(xdist * xdist + ydist * ydist);
double min = gps_dist;
min = min * exp(log(gps_ramp) * (gps_base - z_draw));
if (dist > min) {
bright1 /= (dist / min);
}
if (bright1 < .0025) {
continue;
}
}
if (xk - xk1 >= (1LL << 31)) {
wxy2fxy(xk - (1LL << 32), y[k], &xd[k], &yd[k], z_draw, x_draw, y_draw);
drawClip(xd[k - 1], yd[k - 1], xd[k], yd[k], image, cx, cy, bright1, hue, antialias);
wxy2fxy(x[k], y[k], &xd[k], &yd[k], z_draw, x_draw, y_draw);
wxy2fxy(xk1 + (1LL << 32), y[k - 1], &xd[k - 1], &yd[k - 1], z_draw, x_draw, y_draw);
drawClip(xd[k - 1], yd[k - 1], xd[k], yd[k], image, cx, cy, bright1, hue, antialias);
wxy2fxy(x[k - 1], y[k - 1], &xd[k - 1], &yd[k - 1], z_draw, x_draw, y_draw);
} else if (xk1 - xk >= (1LL << 31)) {
wxy2fxy(xk1 - (1LL << 32), y[k - 1], &xd[k - 1], &yd[k - 1], z_draw, x_draw, y_draw);
drawClip(xd[k - 1], yd[k - 1], xd[k], yd[k], image, cx, cy, bright1, hue, antialias);
wxy2fxy(x[k - 1], y[k - 1], &xd[k - 1], &yd[k - 1], z_draw, x_draw, y_draw);
wxy2fxy(xk + (1LL << 32), y[k], &xd[k], &yd[k], z_draw, x_draw, y_draw);
drawClip(xd[k - 1], yd[k - 1], xd[k], yd[k], image, cx, cy, bright1, hue, antialias);
wxy2fxy(x[k], y[k], &xd[k], &yd[k], z_draw, x_draw, y_draw);
} else {
drawClip(xd[k - 1], yd[k - 1], xd[k], yd[k], image, cx, cy, bright1, hue, antialias);
}
}
}
}