boo/lib/graphicsdev/Common.cpp

#include "Common.hpp"
#include <cmath>

namespace boo
{

void UpdateGammaLUT(ITextureD* tex, float gamma)
{
    void* data = tex->map(65536 * 2);
    for (int i=0 ; i<65536 ; ++i)
    {
        float level = std::pow(i / 65535.f, gamma);
        reinterpret_cast<uint16_t*>(data)[i] = level * 65535.f;
    }
    tex->unmap();
}

}