texture_settings.hpp

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auto& sampler = entt::locator<Sampler>::emplace();
 
// Need to create our default texture sampler object.
if (Settings::mipmap())
{
    switch (Settings::texture_filter())
    {
        case GLTextureFilter::NEAREST:
            sampler.set(GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
            sampler.set(GL_TEXTURE_MAG_FILTER, GL_NEAREST);
            break;
        case GLTextureFilter::BILINEAR:
            sampler.set(GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
            sampler.set(GL_TEXTURE_MAG_FILTER, GL_LINEAR);
            break;
        case GLTextureFilter::TRILINEAR:
            sampler.set(GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
            sampler.set(GL_TEXTURE_MAG_FILTER, GL_LINEAR);
            break;
    }
}
else
{
    if (Settings::texture_filter() == GLTextureFilter::NEAREST)
    {
        sampler.set(GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        sampler.set(GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    }
    else
    {
        sampler.set(GL_TEXTURE_MIN_FILTER, GL_LINEAR);
        sampler.set(GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    }
}
 
auto ansio = std::clamp(Settings::ansiotrophy(), 1, 16);
if (ansio == 3)
{
    ansio = 4;
}
else if (ansio > 4 && ansio < 8)
{
    ansio = 8;
}
else
{
    ansio = 16;
}
sampler.setf(GL_TEXTURE_MAX_ANISOTROPY, static_cast<float>(ansio));
 
sampler.set(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
sampler.set(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
sampler.set(GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
sampler.set(GL_TEXTURE_LOD_BIAS, GL_NONE);