mirror of
https://github.com/neocturne/MinedMap.git
synced 2025-07-01 13:29:06 +02:00
Add mipmap support to allow zooming out
This commit is contained in:
parent
0162c236fa
commit
4d9f29afab
6 changed files with 190 additions and 54 deletions
49
src/Info.cpp
49
src/Info.cpp
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@ -34,7 +34,7 @@
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namespace MinedMap {
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void Info::writeJSON(const char *filename) {
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void Info::writeJSON(const char *filename) const {
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const std::string tmpfile = std::string(filename) + ".tmp";
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FILE *f = fopen(tmpfile.c_str(), "w");
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@ -44,28 +44,43 @@ void Info::writeJSON(const char *filename) {
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}
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fprintf(f, "{\n");
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fprintf(f, " \"info\" : {\n");
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fprintf(f, " \"minX\" : %i,\n", minX);
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fprintf(f, " \"maxX\" : %i,\n", maxX);
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fprintf(f, " \"minZ\" : %i,\n", minZ);
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fprintf(f, " \"maxZ\" : %i\n", maxZ);
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fprintf(f, " },\n");
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fprintf(f, " \"regions\" : [\n");
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fprintf(f, " \"mipmaps\" : [\n");
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for (int z = minZ; z <= maxZ; z++) {
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fprintf(f, " [");
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for (size_t level = 0; level < regions.size(); level++) {
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int minX, maxX, minZ, maxZ;
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std::tie(minX, maxX, minZ, maxZ) = getBounds(level);
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for (int x = minX; x <= maxX; x++) {
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fprintf(f, "%s", regions.count(std::make_pair(x, z)) ? "true" : "false");
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fprintf(f, " {\n");
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fprintf(f, " \"info\" : {\n");
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fprintf(f, " \"minX\" : %i,\n", minX);
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fprintf(f, " \"maxX\" : %i,\n", maxX);
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fprintf(f, " \"minZ\" : %i,\n", minZ);
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fprintf(f, " \"maxZ\" : %i\n", maxZ);
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fprintf(f, " },\n");
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fprintf(f, " \"regions\" : [\n");
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if (x < maxX)
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fprintf(f, ", ");
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for (int z = minZ; z <= maxZ; z++) {
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fprintf(f, " [");
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for (int x = minX; x <= maxX; x++) {
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fprintf(f, "%s", regions[level].count(std::make_pair(x, z)) ? "true" : "false");
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if (x < maxX)
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fprintf(f, ", ");
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}
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if (z < maxZ)
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fprintf(f, "],\n");
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else
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fprintf(f, "]\n");
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}
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if (z < maxZ)
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fprintf(f, "],\n");
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fprintf(f, " ]\n");
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if (level < regions.size() - 1)
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fprintf(f, " },\n");
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else
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fprintf(f, "]\n");
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fprintf(f, " }\n");
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}
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fprintf(f, " ],\n");
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38
src/Info.hpp
38
src/Info.hpp
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@ -31,34 +31,52 @@
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#include <set>
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#include <tuple>
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#include <utility>
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#include <vector>
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namespace MinedMap {
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class Info {
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private:
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std::set<std::pair<int, int>> regions;
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int minX, maxX, minZ, maxZ;
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std::vector<std::set<std::pair<int, int>>> regions;
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std::vector<std::tuple<int, int, int, int>> bounds;
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int32_t spawnX, spawnZ;
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public:
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Info() : minX(INT_MAX), maxX(INT_MIN), minZ(INT_MAX), maxZ(INT_MIN), spawnX(0), spawnZ(0) {}
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Info() : spawnX(0), spawnZ(0) {
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addMipmapLevel();
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}
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void addRegion(int x, int z) {
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regions.insert(std::make_pair(x, z));
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std::tuple<int, int, int, int> getBounds(size_t level) const {
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return bounds[level];
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}
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if (x < minX) minX = x;
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if (x > maxX) maxX = x;
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if (z < minZ) minZ = z;
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if (z > maxZ) maxZ = z;
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void addRegion(int x, int z, size_t level) {
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regions[level].insert(std::make_pair(x, z));
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std::tuple<int, int, int, int> &b = bounds[level];
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if (x < std::get<0>(b)) std::get<0>(b) = x;
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if (x > std::get<1>(b)) std::get<1>(b) = x;
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if (z < std::get<2>(b)) std::get<2>(b) = z;
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if (z > std::get<3>(b)) std::get<3>(b) = z;
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}
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void addMipmapLevel() {
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regions.emplace_back();
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bounds.emplace_back(INT_MAX, INT_MIN, INT_MAX, INT_MIN);
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}
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size_t getMipmapLevel() const {
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return regions.size()-1;
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}
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void setSpawn(const std::pair<int32_t, int32_t> &v) {
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std::tie(spawnX, spawnZ) = v;
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}
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void writeJSON(const char *filename);
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void writeJSON(const char *filename) const;
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};
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}
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118
src/MinedMap.cpp
118
src/MinedMap.cpp
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@ -35,6 +35,7 @@
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#include <cstring>
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#include <cstdlib>
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#include <iostream>
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#include <sstream>
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#include <system_error>
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#include <sys/types.h>
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@ -138,18 +139,26 @@ static void doRegion(const std::string &input, const std::string &output, const
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}
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}
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template<typename T>
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static std::string format(const T &v) {
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std::ostringstream s;
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s << v;
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return s.str();
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}
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static std::string formatTileName(int x, int z, const std::string &ext) {
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std::ostringstream s;
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s << "r." << x << "." << z << "." << ext;
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return s.str();
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}
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static bool checkFilename(const char *name, int *x, int *z) {
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if (std::sscanf(name, "r.%i.%i.mca", x, z) != 2)
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return false;
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size_t l = strlen(name) + 1;
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char buf[l];
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std::snprintf(buf, l, "r.%i.%i.mca", *x, *z);
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if (std::memcmp(name, buf, l))
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return false;
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return true;
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return (std::string(name) == formatTileName(*x, *z, "mca"));
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}
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static void makeDir(const std::string &name) {
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@ -157,7 +166,94 @@ static void makeDir(const std::string &name) {
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throw std::system_error(errno, std::generic_category(), "unable to create directory " + name);
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}
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static void makeMipmaps(const std::string &outputdir, const Info &info) {
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static bool makeMipmap(const std::string &dir, size_t level, size_t x, size_t z, bool colored) {
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bool ret = false;
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std::string indir = dir + "/" + format(level-1) + "/";
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std::string outdir = dir + "/" + format(level) + "/";
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const std::string nw_str = indir + formatTileName(x*2, z*2, "png");
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const std::string ne_str = indir + formatTileName(x*2+1, z*2, "png");
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const std::string sw_str = indir + formatTileName(x*2, z*2+1, "png");
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const std::string se_str = indir + formatTileName(x*2+1, z*2+1, "png");
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const char *nw = nw_str.c_str();
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const char *ne = ne_str.c_str();
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const char *sw = sw_str.c_str();
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const char *se = se_str.c_str();
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struct timespec t;
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struct stat s;
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size_t count = 0;
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for (auto name : {&nw, &ne, &sw, &se}) {
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if (stat(*name, &s) < 0) {
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*name = nullptr;
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continue;
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}
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if (!count || s.st_mtim > t)
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t = s.st_mtim;
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count++;
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}
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std::string output = outdir + formatTileName(x, z, "png");
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if (stat(output.c_str(), &s) == 0) {
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ret = true;
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if (!count || t <= s.st_mtim)
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return ret;
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}
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if (!count)
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return ret;
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const std::string tmpfile = output + ".tmp";
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try {
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PNG::mipmap(tmpfile.c_str(), DIM, DIM, colored, nw, ne, sw, se);
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struct timespec times[2] = {t, t};
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if (utimensat(AT_FDCWD, tmpfile.c_str(), times, 0) < 0)
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std::fprintf(stderr, "Warning: failed to set utime on %s: %s\n", tmpfile.c_str(), std::strerror(errno));
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if (std::rename(tmpfile.c_str(), output.c_str()) < 0) {
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std::fprintf(stderr, "Unable to save %s: %s\n", output.c_str(), std::strerror(errno));
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unlink(tmpfile.c_str());
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}
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}
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catch (const std::exception& ex) {
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unlink(tmpfile.c_str());
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throw;
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}
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return true;
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}
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static void makeMipmaps(const std::string &dir, Info *info) {
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int minX, maxX, minZ, maxZ;
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std::tie(minX, maxX, minZ, maxZ) = info->getBounds(0);
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while (minX < -1 || maxX > 0 || minZ < -1 || maxZ > 0) {
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info->addMipmapLevel();
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size_t level = info->getMipmapLevel();
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makeDir(dir + "/map/" + format(level));
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makeDir(dir + "/light/" + format(level));
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minX = (minX-1)/2;
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maxX = maxX/2;
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minZ = (minZ-1)/2;
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maxZ = maxZ/2;
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for (int x = minX; x <= maxX; x++) {
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for (int z = minZ; z <= maxZ; z++) {
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if (makeMipmap(dir + "/map", level, x, z, true))
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info->addRegion(x, z, level);
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makeMipmap(dir + "/light", level, x, z, false);
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}
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}
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}
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}
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}
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@ -196,7 +292,7 @@ int main(int argc, char *argv[]) {
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if (!checkFilename(entry->d_name, &x, &z))
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continue;
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info.addRegion(x, z);
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info.addRegion(x, z, 0);
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std::string name(entry->d_name), outname = name.substr(0, name.length()-3) + "png";
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doRegion(regiondir + "/" + name, outputdir + "/map/0/" + outname, outputdir + "/light/0/" + outname);
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@ -207,7 +303,7 @@ int main(int argc, char *argv[]) {
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World::Level level((inputdir + "/level.dat").c_str());
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info.setSpawn(level.getSpawn());
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makeMipmaps(outputdir, info);
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makeMipmaps(outputdir, &info);
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info.writeJSON((outputdir + "/info.json").c_str());
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@ -147,7 +147,7 @@ void mipmap(const char *output, size_t width, size_t height, bool colored, const
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readScaled(data, 0, height/2, sw, width, height, colored);
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readScaled(data, width/2, height/2, se, width, height, colored);
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write(output, data, width, height, true);
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write(output, data, width, height, colored);
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}
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}
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