mod_tile/src/metatile.cpp at master · SomeoneElseOSM/mod_tile · GitHub

History

139 lines (117 loc) · 3.56 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

* This program is free software; you can redistribute it and/or

* modify it under the terms of the GNU General Public License

* as published by the Free Software Foundation; either version 2

* of the License, or (at your option) any later version.

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

* You should have received a copy of the GNU General Public License

* along with this program; If not, see http://www.gnu.org/licenses/.

#include <glib.h>

#include <limits.h>

#include <stdlib.h>

#include <string.h>

#include <string>

#include <sys/types.h>

#include "cache_expire.h"

#include "g_logger.h"

#include "metatile.h"

#include "render_config.h"

#include "store.h"

metaTile::metaTile(const std::string &xmlconfig, const std::string &options, int x, int y, int z):

x_(x), y_(y), z_(z), xmlconfig_(xmlconfig), options_(options)

{

clear();

}

void metaTile::clear()

{

for (int x = 0; x < METATILE; x++)

for (int y = 0; y < METATILE; y++) {

tile[x][y] = "";

}

void metaTile::set(int x, int y, const std::string &data)

{

tile[x][y] = data;

}

const std::string metaTile::get(int x, int y)

{

return tile[x][y];

}

// Returns the offset within the meta-tile index table

int metaTile::xyz_to_meta_offset(int x, int y, int z)

{

unsigned char mask = METATILE - 1;

return (x & mask) * METATILE + (y & mask);

}

void metaTile::save(struct storage_backend * store)

{

int ox, oy, limit;

ssize_t offset;

struct meta_layout m;

struct entry offsets[METATILE * METATILE];

char * metatilebuffer;

char *tmp;

memset(&m, 0, sizeof(m));

memset(&offsets, 0, sizeof(offsets));

// Create and write header

m.count = METATILE * METATILE;

memcpy(m.magic, META_MAGIC, strlen(META_MAGIC));

m.x = x_;

m.y = y_;

m.z = z_;

offset = header_size;

limit = METATILE;

// Generate offset table

for (ox = 0; ox < limit; ox++) {

for (oy = 0; oy < limit; oy++) {

int mt = xyz_to_meta_offset(x_ + ox, y_ + oy, z_);

offsets[mt].offset = offset;

offsets[mt].size = tile[ox][oy].size();

offset += offsets[mt].size;

}

metatilebuffer = (char *) malloc(offset);

if (metatilebuffer == 0) {

g_logger(G_LOG_LEVEL_WARNING, "Failed to write metatile. Out of memory");

return;

}

memset(metatilebuffer, 0, offset);

memcpy(metatilebuffer, &m, sizeof(m));

memcpy(metatilebuffer + sizeof(m), &offsets, sizeof(offsets));

// Write tiles

for (ox = 0; ox < limit; ox++) {

for (oy = 0; oy < limit; oy++) {

memcpy(metatilebuffer + offsets[xyz_to_meta_offset(x_ + ox, y_ + oy, z_)].offset, (const void *)tile[ox][oy].data(), tile[ox][oy].size());

}

if (store->metatile_write(store, xmlconfig_.c_str(), options_.c_str(), x_, y_, z_, metatilebuffer, offset) != offset) {

tmp = (char *)malloc(sizeof(char) * PATH_MAX);

g_logger(G_LOG_LEVEL_WARNING, "Failed to write metatile to %s", store->tile_storage_id(store, xmlconfig_.c_str(), options_.c_str(), x_, y_, z_, tmp));

free(tmp);

}

free(metatilebuffer);

}

void metaTile::expire_tiles(int sock, const char *host, const char *uri)

{

if (sock < 0) {

return;

}

g_logger(G_LOG_LEVEL_INFO, "Purging metatile via HTCP cache expiry");

int ox, oy;

int limit = (1 << z_);

limit = MIN(limit, METATILE);

// Generate offset table

for (ox = 0; ox < limit; ox++) {

for (oy = 0; oy < limit; oy++) {

cache_expire(sock, host, uri, (x_ + ox), (y_ + oy), z_);

}

mod_tile/src/metatile.cpp at master · SomeoneElseOSM/mod_tile · GitHub

Expand file tree

Breadcrumbs

metatile.cpp

Latest commit

History

Breadcrumbs

metatile.cpp

File metadata and controls