godot/thirdparty/thekla_atlas/nvimage/BitMap.cpp

// This code is in the public domain -- castanyo@yahoo.es

#include "BitMap.h"

using namespace nv;

void BitMap::resize(uint w, uint h, bool initValue)
{
    BitArray tmp(w*h);

    if (initValue) tmp.setAll();
    else tmp.clearAll();

    // @@ Copying one bit at a time. This could be much faster.
    for (uint y = 0; y < m_height; y++)
    {
        for (uint x = 0; x < m_width; x++)
        {
            //tmp.setBitAt(y*w + x, bitAt(x, y));
            if (bitAt(x, y) != initValue) tmp.toggleBitAt(y*w + x);
        }
    }

    swap(m_bitArray, tmp);
    m_width = w;
    m_height = h;
}