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27 lines
986 B
C++
27 lines
986 B
C++
#include "removedalphafunc.hpp"
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#include <cassert>
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#include <osg/State>
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namespace Shader
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{
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std::array<osg::ref_ptr<RemovedAlphaFunc>, GL_ALWAYS - GL_NEVER> RemovedAlphaFunc::sInstances{
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nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr
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};
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osg::ref_ptr<RemovedAlphaFunc> RemovedAlphaFunc::getInstance(GLenum func)
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{
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assert(func >= GL_NEVER && func <= GL_ALWAYS);
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if (!sInstances[func - GL_NEVER])
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sInstances[func - GL_NEVER] = new RemovedAlphaFunc(static_cast<osg::AlphaFunc::ComparisonFunction>(func), 1.0);
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return sInstances[func - GL_NEVER];
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}
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void RemovedAlphaFunc::apply(osg::State & state) const
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{
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// Hopefully, anything genuinely requiring the default alpha func of GL_ALWAYS explicitly sets it
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if (!state.getGlobalDefaultAttribute(ALPHAFUNC)->getType() != getType())
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state.setGlobalDefaultAttribute(static_cast<const osg::StateAttribute*>(cloneType()));
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}
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}
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