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Fixed label pointer parsing

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This commit is contained in:
Martin Tůma 2020-10-22 20:32:12 +02:00
parent b5893cf506
commit d291e55bdb
3 changed files with 27 additions and 10 deletions
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16
src/map/IMG/bitstream.cpp
View File

@ -12,6 +12,22 @@ bool BitStream1::flush()
return true;
}
bool BitStream1::readUInt24(quint32 &val)
{
quint8 b;
val = 0;
for (int i = 0; i < 3; i++) {
if (!read(8, b))
return false;
val |= (b << (i * 8));
}
return true;
}
bool BitStream4F::flush()
{
if (_length && !_file.seek(_hdl, _file.pos(_hdl) + _length))

2
src/map/IMG/bitstream.h
View File

@ -12,6 +12,8 @@ public:
bool flush();
quint64 bitsAvailable() const {return (quint64)_length * 8 + _remaining;}
bool readUInt24(quint32 &val);
private:
const SubFile &_file;
SubFile::Handle &_hdl;

19
src/map/IMG/netfile.cpp
View File

@ -352,21 +352,19 @@ bool NETFile::linkLabel(Handle &hdl, quint32 offset, quint32 size, LBLFile *lbl,
return false;
BitStream1 bs(*this, hdl, size);
quint32 flags, b, labelPtr = 0;
quint32 flags, labelPtr;
if (!bs.read(8, flags))
return false;
for (int i = 0; i < 3; i++) {
if (!bs.read(8, b))
return false;
labelPtr |= (b << (i * 8));
}
if (!(flags & 1))
return true;
if (lbl && (labelPtr & 0x3FFFFF)) {
if (!bs.readUInt24(labelPtr))
return false;
if (labelPtr & 0x3FFFFF) {
if (labelPtr & 0x400000) {
quint32 lblOff;
if (lblOffset(hdl, labelPtr & 0x3FFFFF, lblOff) && lblOff)
label = lbl->label(lblHdl, lblOff);
} else
label = lbl->label(lblHdl, labelPtr & 0x3FFFFF);
}
@ -489,8 +487,9 @@ bool NETFile::link(const SubDiv *subdiv, quint32 shift, Handle &hdl,
return false;
}
linkLabel(hdl, linkOffset, _linksSize - (linkOffset - _linksOffset), lbl,
lblHdl, poly.label);
if (lbl)
linkLabel(hdl, linkOffset, _linksSize - (linkOffset - _linksOffset),
lbl, lblHdl, poly.label);
lines->append(poly);