irrlicht/source/Irrlicht/OpenGL/ExtensionHandler.cpp

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// Copyright (C) 2015 Patryk Nadrowski
// Copyright (C) 2009-2010 Amundis
// 2017 modified by Michael Zeilfelder (unifying extension handlers)
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in Irrlicht.h
#include "ExtensionHandler.h"
#include "irrString.h"
#include "SMaterial.h"
#include "fast_atof.h"
#include <mt_opengl.h>
namespace irr
{
namespace video
{
void COpenGL3ExtensionHandler::initExtensionsOld()
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{
auto extensions_string = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS));
const char *pos = extensions_string;
while (const char *next = strchr(pos, ' ')) {
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addExtension(std::string{pos, next});
pos = next + 1;
}
addExtension(pos);
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updateLegacyExtensionList();
}
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void COpenGL3ExtensionHandler::initExtensionsNew()
{
int ext_count = GetInteger(GL_NUM_EXTENSIONS);
for (int k = 0; k < ext_count; k++)
addExtension(reinterpret_cast<const char *>(GL.GetStringi(GL_EXTENSIONS, k)));
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updateLegacyExtensionList();
}
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void COpenGL3ExtensionHandler::addExtension(std::string name) {
Extensions.emplace(std::move(name));
}
bool COpenGL3ExtensionHandler::queryExtension(const std::string &name) const{
return Extensions.find(name) != Extensions.end();
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}
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void COpenGL3ExtensionHandler::updateLegacyExtensionList() {
for (size_t j = 0; j < IRR_OGLES_Feature_Count; ++j)
FeatureAvailable[j] = queryExtension(getFeatureString(j));
}
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} // end namespace video
} // end namespace irr