Check for graphics driver support.

include/JGL/JGL.h

@@ -34,6 +34,8 @@ namespace JGL {
     void Update(const Vector2& window_size);
     inline void PurgeFontCache() { fontCache.purgeCache(); }
     std::vector<GLfloat> OpenGLPerspectiveProjectionRH(float fovY, float aspect, float z_near, float z_far);
+    /// Returns true if the graphics driver meets the requirements (GL Version & Extensions).
+    bool MeetsRequirements();
 
     /// Drawing functions for primitive 2D Shapes.
     namespace J2D {

main.cpp

@@ -4,6 +4,7 @@
 #include <Colors.hpp>
 #include <chrono>
 #include <J3ML/LinearAlgebra/Vector2.hpp>
+#include <JGL/logger/logger.h>
 
 using J3ML::LinearAlgebra::Vector2;
 using namespace JGL;
@@ -99,8 +100,11 @@ class JGLDemoWindow : public ReWindow::RWindow
 public:
     void initGL() {
         camera = new Camera;
-
         gladLoadGL();
+        if (!JGL::MeetsRequirements()) {
+            Logger::Fatal("The graphics driver does not meet the minimum requirements to run this program.");
+            exit(-1);
+        }
         JGL::InitTextEngine();
         JGL::Update(getSize());
         J3D::Init(getSize(), 90, 100);

src/JGL.cpp

@@ -34,6 +34,16 @@ namespace JGL {
         glViewport(0, 0, (int) wS.x, (int) wS.y);
     }
 
+    bool MeetsRequirements() {
+        if (!GLAD_GL_VERSION_2_1)
+            return false;
+        if (!GLAD_GL_EXT_framebuffer_object)
+            return false;
+        if (!GLAD_GL_ARB_framebuffer_object)
+            return false;
+        return true;
+    }
+
 #pragma region J2D
     void J2D::Begin(RenderTarget* rt, bool clear_buffers) {
         GLfloat old_clear_color[4];