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/****************************************************************************
* MeshLab o o *
* An extendible mesh processor o o *
* _ O _ *
* Copyright(C) 2005, 2009 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* 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 (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
#include <wrap/bmt/bmt.h>
using namespace std;
using namespace vcg;
Bmt::Bmt(): fp(NULL) {}
Bmt::~Bmt() {}
bool Bmt::Load(const std::string &filename) {
fp = fopen(filename.c_str(), "rb");
if(!fp) return false;
unsigned int magic;
fread(&magic, sizeof(unsigned int), 1, fp);
if(magic != 0x62647421) //bmt!
return false;
//signature
fread(&signature, sizeof(unsigned int), 1, fp);
//sphere
fread(&sphere, sizeof(Sphere3f), 1, fp);
//index and history offsets and size;
fread(&index_offset, sizeof(unsigned int), 1, fp);
fread(&index_size, sizeof(unsigned int), 1, fp);
fread(&history_offset, sizeof(unsigned int), 1, fp);
fread(&history_size, sizeof(unsigned int), 1, fp);
//index
index.resize(index_size);
fread(&index[0], sizeof(Bmt::Cell), index.size(), fp);
//history
history.resize(history_size);
for(unsigned int i = 0; i < history.size(); i++) {
vector<Bmt::Cell *> &created = history[i].created;
vector<Bmt::Cell *> &erased = history[i].erased;
unsigned int created_size;
fread(&created_size, sizeof(unsigned int), 1, fp);
created.resize(created_size);
fread(&*created.begin(), sizeof(unsigned int), created.size(), fp);
for(unsigned int k = 0; k < created_size; k++)
created[k] = &(index[(unsigned int)created[k]]);
unsigned int erased_size;
fread(&erased_size, sizeof(unsigned int), 1, fp);
erased.resize(erased_size);
fread(&*erased.begin(), sizeof(unsigned int), erased.size(), fp);
for(unsigned int k = 0; k < erased_size; k++)
erased[k] = &(index[(unsigned int)erased[k]]);
}
return true;
}
char *Bmt::GetData(unsigned int &size, unsigned int offset) {
fseek(fp, offset, SEEK_SET);
fread(&size, sizeof(unsigned int), 1, fp);
assert(size < 64000);
char *data = new char[size];
fread(data, 1, size, fp);
return data;
}
/*unsigned int &Bmt::IndexOffset();
unsigned int &Bmt::IndexSize();
Bmt::Cell *Bmt::IndexBegin();
unsigned int &Bmt::HistoryOffset();
unsigned int &Bmt::HistorySize();
unsigned int *Bmt::HistoryBegin(); */
/**** BMT BUILDER ****/
BmtBuilder::BmtBuilder(): ftmp(NULL), fout(NULL) {}
BmtBuilder::~BmtBuilder() {}
bool BmtBuilder::Create(unsigned int sign) {
signature = sign;
ftmp = fopen("tmp.bmt", "wb+");
if(!ftmp)
return false;
return true;
}
unsigned int BmtBuilder::AddCell(Bmt::Cell cell, unsigned int size, char *data) {
sphere.Add(cell.sphere);
cell.offset = ftell(ftmp);
index.push_back(cell);
//TODO: add padding to 4 or 8 bytes.
fwrite(&size, sizeof(unsigned int), 1, ftmp);
fwrite(data, 1, size, ftmp);
return index.size()-1;
}
void BmtBuilder::AddUpdate(std::vector<unsigned int> &created, std::vector<unsigned int> &erased) {
creation.push_back(created);
deletion.push_back(erased);
}
bool BmtBuilder::Save(const std::string &filename) {
assert(ftmp);
//TODO: reorganize data to be spatially coherent (both index and related data.
fout = fopen(filename.c_str(), "wb+");
if(!fout) {
fclose(ftmp);
return false;
}
//first thing we write a magic constant "bmt!"
unsigned int magic = 0x62647421; //bmt!
fwrite(&magic, sizeof(unsigned int), 1, fout);
//signature:
fwrite(&signature, sizeof(unsigned int), 1, fout);
//sphere
fwrite(&sphere, sizeof(Sphere3f), 1, fout);
//next we write index and history offset and size
unsigned int index_offset = 5 * sizeof(unsigned int) + sizeof(Sphere3f);
unsigned int index_size = index.size();
fwrite(&index_offset, sizeof(unsigned int), 1, fout);
fwrite(&index_size, sizeof(unsigned int), 1, fout);
unsigned int history_offset = index_offset + index_size * sizeof(Bmt::Cell);
unsigned int history_size = creation.size();
fwrite(&history_offset, sizeof(unsigned int), 1, fout);
fwrite(&history_size, sizeof(unsigned int), 1, fout);
unsigned int index_start = ftell(fout);
//writing index (but its a fake... it will need to be rewritten late5r with correct offsets
fwrite(&index[0], sizeof(Bmt::Cell), index.size(), fout);
//writing history
for(unsigned int i = 0; i < creation.size(); i++) {
vector<unsigned int> &created = creation[i];
vector<unsigned int> &erased = deletion[i];
unsigned int created_size = created.size();
fwrite(&created_size, sizeof(unsigned int), 1, fout);
fwrite(&*created.begin(), sizeof(unsigned int), created.size(), fout);
unsigned int erased_size = erased.size();
fwrite(&erased_size, sizeof(unsigned int), 1, fout);
fwrite(&*created.begin(), sizeof(unsigned int), erased.size(), fout);
}
//writing data
vector<Bmt::Cell>::iterator k;
for(k = index.begin(); k != index.end(); k++) {
Bmt::Cell &cell = *k;
fseek(ftmp, cell.offset, SEEK_SET);
unsigned int size;
fread(&size, sizeof(unsigned int), 1, ftmp);
char *data = new char[size];
fread(data, 1, size, ftmp);
cell.offset = ftell(fout);
fwrite(&size, sizeof(unsigned int), 1, fout);
fwrite(data, 1, size, fout);
delete []data;
}
//writing index again
fseek(fout, index_start, SEEK_SET);
fwrite(&index[0], sizeof(Bmt::Cell), index.size(), fout);
fclose(fout);
return true;
}
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