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#include "removedalphafunc.hpp"
#include <cassert>
#include <osg/State>
namespace Shader
{
std::array<osg::ref_ptr<RemovedAlphaFunc>, GL_ALWAYS - GL_NEVER + 1> RemovedAlphaFunc::sInstances{
nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr
};
osg::ref_ptr<RemovedAlphaFunc> RemovedAlphaFunc::getInstance(GLenum func)
{
assert(func >= GL_NEVER && func <= GL_ALWAYS);
if (!sInstances[func - GL_NEVER])
sInstances[func - GL_NEVER] = new RemovedAlphaFunc(static_cast<osg::AlphaFunc::ComparisonFunction>(func), 1.0);
return sInstances[func - GL_NEVER];
}
}
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