PBO* GLResource::getPBO( int size )
{
int i;
int supindex = -1, infindex = -1;
int supdelta = 0, infdelta = 0;
/*int total = 0;
for ( i = 0; i < pboList.count(); ++i )
total += pboList.at(i)->size();
qDebug() << "Total PBO bytes :" << total << pboList.count();*/
for ( i = 0; i < pboList.count(); ++i ) {
PBO *p = pboList.at(i);
if ( p->isFree() ) {
if ( p->size() == size ) {
p->setFree( false );
return p;
}
if ( p->size() > size ) {
int d = p->size() - size;
if ( supindex == -1 || d < supdelta ) {
supdelta = d;
supindex = i;
}
}
else {
int d = size - p->size();
if ( infindex == -1 || d < infdelta ) {
infdelta = d;
infindex = i;
}
}
}
}
if ( supindex != -1 ) {
PBO *p = pboList.at( supindex );
p->setFree( false );
return p;
}
if ( infindex != -1 ) {
PBO *p = pboList.at( infindex );
if ( !p->resize( size ) ) {
qDebug() << "pbo resize error";
return NULL;
}
p->setFree( false );
return p;
}
PBO *p = new PBO( size );
if ( !p->isValid() ) {
delete p;
qDebug() << "new pbo error";
return NULL;
}
pboList.append( p );
p->setFree( false );
return p;
}