void ossimBandSelector::checkPassThrough()
{
thePassThroughFlag = ((theInputConnection == 0)||!outputBandsWithinInputRange());
// check if marked with improper bands
if(thePassThroughFlag) return;
if(theInputConnection)
{
std::vector<ossim_uint32> inputList;
theInputConnection->getOutputBandList(inputList);
if ( inputList.size() == theOutputBandList.size() )
{
const std::vector<ossim_uint32>::size_type SIZE =
theOutputBandList.size();
std::vector<ossim_uint32>::size_type i = 0;
while (i < SIZE)
{
if ( inputList[i] != theOutputBandList[i] )
{
break;
}
++i;
}
if (i == SIZE)
{
thePassThroughFlag = true;
}
}
}
else
{
if(traceDebug())
{
ossimNotify(ossimNotifyLevel_WARN)
<< "ossimBandSelector::isOrderedCorrectly() ERROR:"
<< "Method called prior to initialization!\n";
}
}
}
ossimRefPtr<ossimImageData> ossimBandSelector::getTile(
const ossimIrect& tileRect,
ossim_uint32 resLevel)
{
if (!theInputConnection)
{
return ossimRefPtr<ossimImageData>();
}
// Get the tile from the source.
ossimRefPtr<ossimImageData> t = theInputConnection->getTile(tileRect,
resLevel);
if (!theEnableFlag)
{
return t; // This tile source bypassed, return the input tile source.
}
if (theOrderedCorrectlyFlag)
{
return t; // Input band order same as output band order.
}
if(!theTile.valid()) // First time through, might not be initialized...
{
allocate();
if (!theTile.valid())
{
// Should never happen...
return t; // initialize failed.
}
}
theTile->setImageRectangle(tileRect);
if(theWithinRangeFlag == ossimBandSelectorWithinRangeFlagState_NOT_SET)
{
theWithinRangeFlag = ((outputBandsWithinInputRange() == true)?ossimBandSelectorWithinRangeFlagState_IN_RANGE:
ossimBandSelectorWithinRangeFlagState_OUT_OF_RANGE);
}
if(theWithinRangeFlag == ossimBandSelectorWithinRangeFlagState_OUT_OF_RANGE)
{
theTile->makeBlank();
return theTile;
}
if ( !t.valid() ||
(t->getDataObjectStatus() == OSSIM_EMPTY) ||
(t->getDataObjectStatus() == OSSIM_NULL))
{
//---
// Since we're enabled, we must return our tile not "t" so the
// correct number of bands goes through the chain.
//---
theTile->makeBlank();
return theTile;
}
// Copy selected bands to our tile.
for (ossim_uint32 i=0; i<theOutputBandList.size(); i++)
{
theTile->assignBand(t.get(), theOutputBandList[i], i);
}
theTile->validate();
return theTile;
}
