void Image::flipVertical()
{
if(isCompressed(format_))
{
throw runtime_error("Cannot flip compressed image");
}
int stride = width_ * bitsPerPixel(format_) / 8;
vector<uint8_t> rowBuf(stride);
for(int y = 0; y < height_ / 2; y++)
{
memcpy(rowBuf.data(), data_.data() + y * stride, stride);
memcpy(data_.data() + stride * y, data_.data() + (height_ - y - 1) * stride, stride);
memcpy(data_.data() + (height_ - y - 1) * stride, rowBuf.data(), stride);
}
}
void LpSub::constraint2row(
ArrayBuffer<Constraint*> &cons,
ArrayBuffer<Row*> &rows)
{
int conNnz; //!< number of nonzero elements in constraint
Row rowBuf(master_, sub_->nVar()); //!< dummy to generate row
Row *row; //!< pointer to the new row
const int nCons = cons.size();
for (int c = 0; c < nCons; c++) {
conNnz = cons[c]->genRow(sub_->actVar(), rowBuf);
row = new Row(master_, conNnz);
row->copy(rowBuf);
rows.push(row);
rowBuf.clear();
}
}