root/GPXSee
1
0
Fork 0
mirror of https://github.com/tumic0/GPXSee.git synced 2025-02-16 07:40:49 +01:00
Code Issues Projects Releases Activity

Added support for OZF3 map files

Browse Source
This commit is contained in:
Martin Tůma 2017-05-03 21:34:13 +02:00
parent 1a66ed0a36
commit 1e4bcd0ac1
3 changed files with 112 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/offlinemap.cpp
View File

@ -348,12 +348,12 @@ bool OfflineMap::getImageInfo(const QString &path)
}
QString suffix = ii.suffix().toLower();
if (suffix == "ozf3" || suffix == "ozfx3" || suffix == "ozf4"
|| suffix == "ozfx4") {
_errorString = QString("%1: Obfuscated image files not supported")
if (suffix == "ozf4" || suffix == "ozfx4") {
_errorString = QString("%1: OZF4 image files not supported")
.arg(QFileInfo(_imgPath).fileName());
return false;
} else if (suffix == "ozf2" || suffix == "ozfx2") {
} else if (suffix == "ozf2" || suffix == "ozfx2" || suffix == "ozf3"
|| suffix == "ozfx3") {
_ozf.load(_imgPath);
_size = _ozf.size();
} else {

110
src/ozf.cpp
View File

@ -3,8 +3,23 @@
#include "ozf.h"
#define OZF2_MAGIC 0x7778
#define OZF2_SEPARATOR 0x77777777
#define OZF2_MAGIC 0x7778
#define OZF3_MAGIC 0x7780
#define SEPARATOR 0x77777777
static const quint8 XKEY[] =
{
0x2D, 0x4A, 0x43, 0xF1, 0x27, 0x9B, 0x69, 0x4F,
0x36, 0x52, 0x87, 0xEC, 0x5F, 0x42, 0x53, 0x22,
0x9E, 0x8B, 0x2D, 0x83, 0x3D, 0xD2, 0x84, 0xBA,
0xD8, 0x5B
};
static void decrypt(void *data, size_t size, quint8 init)
{
for (size_t i = 0; i < size; i++)
reinterpret_cast<quint8*>(data)[i] ^= XKEY[i % sizeof(XKEY)] + init;
}
template<class T> bool OZF::readValue(T &val)
{
@ -13,6 +28,9 @@ template<class T> bool OZF::readValue(T &val)
if (_file.read((char*)&data, sizeof(T)) < (qint64)sizeof(T))
return false;
if (_decrypt)
decrypt(&data, sizeof(T), _key);
if (sizeof(T) > 1)
val = qFromLittleEndian(data);
else
@ -21,17 +39,88 @@ template<class T> bool OZF::readValue(T &val)
return true;
}
bool OZF::read(void *data, size_t size)
{
if (_file.read((char*)data, size) < (qint64)size)
return false;
if (_decrypt)
decrypt(data, size, _key);
return true;
}
bool OZF::readKey()
{
quint8 randomNumber, initial;
quint32 keyblock;
if (!_file.seek(14))
return false;
if (!readValue(randomNumber))
return false;
if (!_file.seek(162))
return false;
if (!readValue(initial))
return false;
_decrypt = true; _key = initial;
if (!_file.seek(15 + randomNumber))
return false;
if (!readValue(keyblock))
return false;
switch (keyblock & 0xFF) {
case 0xf1:
initial += 0x8a;
break;
case 0x18:
case 0x54:
initial += 0xa0;
break;
case 0x56:
initial += 0xb9;
break;
case 0x43:
initial += 0x6a;
break;
case 0x83:
initial += 0xa4;
break;
case 0xc5:
initial += 0x7e;
break;
case 0x38:
initial += 0xc1;
break;
default:
break;
}
_key = initial;
return true;
}
bool OZF::readHeaders()
{
quint16 magic;
quint32 separator;
if (!readValue(magic) || magic != OZF2_MAGIC)
if (!readValue(magic))
return false;
if (!_file.seek(_file.pos() + 52))
return false;
if (!readValue(separator) || separator != OZF2_SEPARATOR)
if (magic == OZF2_MAGIC) {
if (!_file.seek(_file.pos() + 52))
return false;
if (!readValue(separator) || separator != SEPARATOR)
return false;
} else if (magic == OZF3_MAGIC) {
if (!readKey())
return false;
} else
return false;
return true;
@ -69,9 +158,10 @@ bool OZF::readTileTable()
_dim = QSize(x, y);
_palette = QVector<quint32>(256);
if (!read(&(_palette[0]), sizeof(quint32) * 256))
return false;
for (int i = 0; i < _palette.size(); i++) {
if (!readValue(bgr0))
return false;
bgr0 = qFromLittleEndian(_palette.at(i));
quint32 b = (bgr0 & 0x000000FF);
quint32 g = (bgr0 & 0x0000FF00) >> 8;
@ -98,7 +188,7 @@ bool OZF::load(const QString &path)
return false;
if (!readHeaders()) {
qWarning("%s: not a OZF2 file", qPrintable(_file.fileName()));
qWarning("%s: not a OZF2/OZF3 file", qPrintable(_file.fileName()));
_file.close();
return false;
}
@ -128,6 +218,8 @@ QPixmap OZF::tile(int x, int y)
QByteArray ba = _file.read(size);
if (ba.size() != size)
return QPixmap();
if (_decrypt)
decrypt(ba.data(), qMin(16, ba.size()), _key);
quint32 bes = qToBigEndian(tileSize().width() * tileSize().height());
ba.prepend(QByteArray((char*)&bes, sizeof(bes)));
QByteArray uba = qUncompress(ba);

7
src/ozf.h
View File

@ -11,6 +11,8 @@
class OZF
{
public:
OZF() : _decrypt(false), _key(0) {}
bool load(const QString &path);
QString fileName() const {return _file.fileName();}
@ -22,9 +24,14 @@ public:
private:
template<class T> bool readValue(T &val);
bool read(void *data, size_t size);
bool readKey();
bool readHeaders();
bool readTileTable();
bool _decrypt;
quint8 _key;
QSize _size;
QSize _dim;
QVector<QRgb> _palette;