void findUniqueIdRange(int *minId, int *maxId)
{
if (!minId && !maxId) return;
if (minId) *minId = DDMAXINT;
if (maxId) *maxId = DDMININT;
PathTreeIterator<Index> iter(index.leafNodes());
while (iter.hasNext())
{
TextureManifest &manifest = iter.next();
int const uniqueId = manifest.uniqueId();
if (minId && uniqueId < *minId) *minId = uniqueId;
if (maxId && uniqueId > *maxId) *maxId = uniqueId;
}
}
void rebuildUniqueIdLut()
{
// Is a rebuild necessary?
if(!uniqueIdLutDirty) return;
// Determine the size of the LUT.
int minId, maxId;
findUniqueIdRange(&minId, &maxId);
int lutSize = 0;
if(minId > maxId) // None found?
{
uniqueIdBase = 0;
}
else
{
uniqueIdBase = minId;
lutSize = maxId - minId + 1;
}
// Fill the LUT with initial values.
#ifdef DENG2_QT_4_7_OR_NEWER
uniqueIdLut.reserve(lutSize);
#endif
int i = 0;
for(; i < uniqueIdLut.size(); ++i)
{
uniqueIdLut[i] = 0;
}
for(; i < lutSize; ++i)
{
uniqueIdLut.push_back(0);
}
if(lutSize)
{
// Populate the LUT.
PathTreeIterator<Index> iter(index.leafNodes());
while(iter.hasNext())
{
linkInUniqueIdLut(iter.next());
}
}
uniqueIdLutDirty = false;
}