Using Semver to check minimum required OpenGL version

src/PrusaSlicer.cpp

@@ -184,18 +184,14 @@ int CLI::run(int argc, char **argv)
 
     it = std::find(m_actions.begin(), m_actions.end(), "opengl-version");
     if (it != m_actions.end()) {
-        std::string opengl_version_str = m_config.opt_string("opengl-version");
-        if (std::find(Slic3r::GUI::OpenGLVersions::core_str.begin(), Slic3r::GUI::OpenGLVersions::core_str.end(), opengl_version_str) == Slic3r::GUI::OpenGLVersions::core_str.end()) {
-            boost::nowide::cerr << "Required OpenGL version " << opengl_version_str << " is invalid. Must be greater than or equal to 3.2" << std::endl;
-            opengl_version_str.clear();
-        }
-
-        if (!opengl_version_str.empty()) {
-            std::vector<std::string> tokens;
-            boost::split(tokens, opengl_version_str, boost::is_any_of("."), boost::token_compress_on);
-            opengl_version.first = std::stoi(tokens[0].c_str());
-            opengl_version.second = std::stoi(tokens[1].c_str());
-        }
+        const Semver opengl_minimum = Semver(3,2,0);
+        const std::string opengl_version_str = m_config.opt_string("opengl-version");
+        boost::optional<Semver> semver = Semver::parse(opengl_version_str);
+        if (semver.has_value() && (*semver) >= opengl_minimum ) {
+            opengl_version.first = semver->maj();
+            opengl_version.second = semver->min();
+        } else
+            boost::nowide::cerr << "Required OpenGL version " << opengl_version_str << " is invalid. Must be greater than or equal to " << opengl_minimum.to_string() << std::endl;
         start_gui = true;
         m_actions.erase(it);
     }

src/slic3r/GUI/GUI_Init.cpp

@@ -30,11 +30,7 @@
 namespace Slic3r {
 namespace GUI {
 
-const std::vector<std::string> OpenGLVersions::core_str    = { "3.2", "3.3", "4.0", "4.1", "4.2", "4.3", "4.4", "4.5", "4.6" };
-const std::vector<std::string> OpenGLVersions::precore_str = { "2.0", "2.1", "3.0", "3.1" };
-
 const std::vector<std::pair<int, int>> OpenGLVersions::core    = { {3,2}, {3,3}, {4,0}, {4,1}, {4,2}, {4,3}, {4,4}, {4,5}, {4,6} };
-const std::vector<std::pair<int, int>> OpenGLVersions::precore = { {2,0}, {2,1}, {3,0}, {3,1} };
 
 int GUI_Run(GUI_InitParams &params)
 {

src/slic3r/GUI/GUI_Init.hpp

@@ -14,11 +14,7 @@ namespace GUI {
 
 struct OpenGLVersions
 {
-	static const std::vector<std::string> core_str;
-	static const std::vector<std::string> precore_str;
-
 	static const std::vector<std::pair<int, int>> core;
-	static const std::vector<std::pair<int, int>> precore;
 };
 
 struct GUI_InitParams