// blue colored
QImage TorrentProgressWidget::generate(const libtorrent::bitfield& data, int width, quint32* buf, float sstart, float send)
{
double fact = (data.size()-send-sstart)/float(width);
double step = qMin<double>(255.0, 255.0/fact);
for(int i=0;i<width;i++)
{
int from = i*fact+sstart;
int to = (i+1)*fact+sstart;
if(to >= (int) data.size())
to = data.size()-1;
double color = 0;
do
{
color += data[from] ? step : 0;
from++;
}
while(from <= to);
quint32 rcolor = 255 - qMin(quint32(color), 255U);
buf[i] = 0xff0000ff | (rcolor << 8) | (rcolor << 16);
}
return QImage((uchar*) buf, width, 1, QImage::Format_RGB32);
}
QList<QPair<int, int> > FindTrues (const libtorrent::bitfield& pieces)
{
QList<QPair<int, int> > result;
bool prevVal = pieces [0];
int prevPos = 0;
int size = static_cast<int> (pieces.size ());
for (int i = 1; i < size; ++i)
if (pieces [i] != prevVal)
{
if (prevVal)
result << qMakePair (prevPos, i);
prevPos = i;
prevVal = 1 - prevVal;
}
if (!prevPos && prevVal)
result << qMakePair<int, int> (0, pieces.size ());
else if (prevVal && result.size () && result.last ().second != size - 1)
result << qMakePair<int, int> (prevPos, size);
else if (prevVal && !result.size ())
result << qMakePair<int, int> (0, size);
return result;
}
void Context::bitfieldToVector(libtorrent::bitfield const& _input,
std::vector<bool> & _output) const
{
_output.resize(_input.size());
std::copy(_input.begin(), _input.end(), _output.begin());
}