virtualx-engine/thirdparty/thekla_atlas/nvimage/BitMap.cpp

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// 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;
}