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#include <iostream>
#include <map>
#include <set>
#include <vector>
#include <algorithm>
#include <GLFW/glfw3.h>
#include <glbinding/AbstractFunction.h>
#include <glbinding/Version.h>
#include <glbinding/glbinding.h>
#include <glbinding/gl/gl.h>
#include <glbinding-aux/Meta.h>
#include <glbinding-aux/ContextInfo.h>
#include <glbinding-aux/ValidVersions.h>
#include <glbinding-aux/types_to_string.h>
using namespace gl;
using namespace glbinding;
void error(int errnum, const char * errmsg)
{
std::cerr << errnum << ": " << errmsg << std::endl;
}
void printExtensions(const std::set<std::string> & extensions)
{
size_t column = 8;
for (auto it = extensions.begin(); it != extensions.end(); ++it)
{
const auto & extensionString = *it;
if (column > 8 && column + extensionString.size() > 78)
{
std::cout << std::endl << "\t";
column = 8;
}
std::cout << extensionString;
auto endOfIt = it;
++endOfIt;
if (endOfIt != extensions.end())
{
std::cout << ", ";
column += extensionString.size();
}
else
{
std::cout << std::endl;
}
}
}
void printInfos()
{
// gather available extensions
std::set<std::string> unknownExts;
const auto supportedExtensions = aux::ContextInfo::extensions(unknownExts);
auto extensionsByVersion = std::map<Version, std::set<GLextension>>();
auto versions = aux::Meta::versions();
versions.insert(Version{}); // provide NONE Version for extensions without associated version
for (const auto & version : versions)
{
const auto extensions = aux::Meta::extensions(version);
if (extensions.empty())
continue;
extensionsByVersion[version] = extensions;
}
if (!unknownExts.empty())
{
std::cout << std::endl << "Miscellaneous: " << unknownExts.size() << " Extensions" << std::endl << "\t";
printExtensions(unknownExts);
}
for (const auto & pair : extensionsByVersion)
{
auto supported = size_t(0);
const auto required = pair.second.size();
std::set<std::string> extensionStrings;
for (const auto & ext : pair.second)
{
supported += supportedExtensions.find(ext) != supportedExtensions.cend() ? 1 : 0;
extensionStrings.insert(aux::Meta::getString(ext));
}
if (pair.first.isNull())
{
std::cout << std::endl << "Unassociated: " << supported << " Extensions" << std::endl << "\t";
}
else
{
std::cout << std::endl << "Feature " << pair.first.toString() << (supported == required ? " (supported)" : "") << ": " << supported << " of " << required << " Extensions" << std::endl << "\t";
}
printExtensions(extensionStrings);
}
}
int main()
{
glfwSetErrorCallback(error);
if (!glfwInit())
return 1;
glfwDefaultWindowHints();
glfwWindowHint(GLFW_VISIBLE, false);
#ifdef SYSTEM_DARWIN
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, true);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
#endif
auto window = glfwCreateWindow(320, 240, "", nullptr, nullptr);
if (!window)
{
glfwTerminate();
return -1;
}
glfwHideWindow(window);
glfwMakeContextCurrent(window);
glbinding::initialize(glfwGetProcAddress, true);
printInfos();
// print some gl infos (query)
std::cout << std::endl
<< "OpenGL Version: " << aux::ContextInfo::version() << std::endl
<< "OpenGL Vendor: " << aux::ContextInfo::vendor() << std::endl
<< "OpenGL Renderer: " << aux::ContextInfo::renderer() << std::endl
<< "OpenGL Revision: " << aux::Meta::glRevision() << " (gl.xml)" << std::endl << std::endl;
glfwTerminate();
return 0;
}
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