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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "SMFMapFile.h"
#include "Map/ReadMap.h"
#include "System/Exceptions.h"
#include <cassert>
#include <cstring>
using std::string;
CSMFMapFile::CSMFMapFile(const string& mapFileName)
: ifs(mapFileName), featureFileOffset(0)
{
memset(&header, 0, sizeof(header));
memset(&featureHeader, 0, sizeof(featureHeader));
if (!ifs.FileExists())
throw content_error("Couldn't open map file " + mapFileName);
READPTR_MAPHEADER(header, (&ifs));
if (strcmp(header.magic, "spring map file") != 0 ||
header.version != 1 || header.tilesize != 32 ||
header.texelPerSquare != 8 || header.squareSize != 8)
throw content_error("Incorrect map file " + mapFileName);
}
void CSMFMapFile::ReadMinimap(void* data)
{
ifs.Seek(header.minimapPtr);
ifs.Read(data, MINIMAP_SIZE);
}
int CSMFMapFile::ReadMinimap(std::vector<boost::uint8_t>& data, unsigned miplevel)
{
int offset=0;
int mipsize = 1024;
for (unsigned i = 0; i < std::min((unsigned)MINIMAP_NUM_MIPMAP, miplevel); i++)
{
const int size = ((mipsize+3)/4)*((mipsize+3)/4)*8;
offset += size;
mipsize >>= 1;
}
const int size = ((mipsize+3)/4)*((mipsize+3)/4)*8;
data.resize(size);
ifs.Seek(header.minimapPtr + offset);
ifs.Read(&data[0], size);
return mipsize;
}
// used only by ReadInfoMap (for unitsync)
void CSMFMapFile::ReadHeightmap(unsigned short* heightmap)
{
const int hmx = header.mapx + 1;
const int hmy = header.mapy + 1;
ifs.Seek(header.heightmapPtr);
ifs.Read(heightmap, hmx * hmy * sizeof(short));
for (int y = 0; y < hmx * hmy; ++y) {
swabWordInPlace(heightmap[y]);
}
}
void CSMFMapFile::ReadHeightmap(float* sHeightMap, float* uHeightMap, float base, float mod)
{
const int hmx = header.mapx + 1;
const int hmy = header.mapy + 1;
unsigned short* temphm = new unsigned short[hmx * hmy];
ifs.Seek(header.heightmapPtr);
ifs.Read(temphm, hmx * hmy * 2);
for (int y = 0; y < hmx * hmy; ++y) {
const float h = base + swabWord(temphm[y]) * mod;
if (sHeightMap != NULL) { sHeightMap[y] = h; }
if (uHeightMap != NULL) { uHeightMap[y] = h; }
}
delete[] temphm;
}
void CSMFMapFile::ReadFeatureInfo()
{
ifs.Seek(header.featurePtr);
READ_MAPFEATUREHEADER(featureHeader, (&ifs));
featureTypes.resize(featureHeader.numFeatureType);
for(int a = 0; a < featureHeader.numFeatureType; ++a) {
char c;
ifs.Read(&c, 1);
while (c) {
featureTypes[a] += c;
ifs.Read(&c, 1);
}
}
featureFileOffset = ifs.GetPos();
}
void CSMFMapFile::ReadFeatureInfo(MapFeatureInfo* f)
{
assert(featureFileOffset != 0);
ifs.Seek(featureFileOffset);
for(int a = 0; a < featureHeader.numFeatures; ++a) {
MapFeatureStruct ffs;
READ_MAPFEATURESTRUCT(ffs, (&ifs));
f[a].featureType = ffs.featureType;
f[a].pos = float3(ffs.xpos, ffs.ypos, ffs.zpos);
f[a].rotation = ffs.rotation;
}
}
const char* CSMFMapFile::GetFeatureTypeName(int typeID) const
{
assert(typeID >= 0 && typeID < featureHeader.numFeatureType);
return featureTypes[typeID].c_str();
}
void CSMFMapFile::GetInfoMapSize(const string& name, MapBitmapInfo* info) const
{
if (name == "height") {
*info = MapBitmapInfo(header.mapx + 1, header.mapy + 1);
}
else if (name == "grass") {
*info = MapBitmapInfo(header.mapx / 4, header.mapy / 4);
}
else if (name == "metal") {
*info = MapBitmapInfo(header.mapx / 2, header.mapy / 2);
}
else if (name == "type") {
*info = MapBitmapInfo(header.mapx / 2, header.mapy / 2);
}
else {
*info = MapBitmapInfo(0, 0);
}
}
bool CSMFMapFile::ReadInfoMap(const string& name, void* data)
{
if (name == "height") {
ReadHeightmap((unsigned short*)data);
return true;
}
else if (name == "grass") {
ReadGrassMap(data);
return true;
}
else if(name == "metal") {
ifs.Seek(header.metalmapPtr);
ifs.Read(data, header.mapx / 2 * header.mapy / 2);
return true;
}
else if(name == "type") {
ifs.Seek(header.typeMapPtr);
ifs.Read(data, header.mapx / 2 * header.mapy / 2);
return true;
}
return false;
}
void CSMFMapFile::ReadGrassMap(void *data)
{
ifs.Seek(sizeof(SMFHeader));
for (int a = 0; a < header.numExtraHeaders; ++a) {
int size;
ifs.Read(&size, 4);
swabDWordInPlace(size);
int type;
ifs.Read(&type, 4);
swabDWordInPlace(type);
if (type == MEH_Vegetation) {
int pos;
ifs.Read(&pos, 4);
swabDWordInPlace(pos);
ifs.Seek(pos);
ifs.Read(data, header.mapx / 4 * header.mapy / 4);
/* char; no swabbing. */
break; //we arent interested in other extensions anyway
}
else {
// assumes we can use data as scratch memory
assert(size - 8 <= header.mapx / 4 * header.mapy / 4);
ifs.Read(data, size - 8);
}
}
}
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