Merge branch 'tmj-dev' into milek-dev

renderer.cpp

@@ -433,6 +433,9 @@ opengl_renderer::Render() {
     setup_units( true, false, false );
     Application.render_ui();
 
+    // swapbuffers() could unbind current buffers so we prepare for it on our end
+    gfx::opengl_vbogeometrybank::reset();
+
     Timer::subsystem.gfx_swap.start();
     glfwSwapBuffers( m_window );
     Timer::subsystem.gfx_swap.stop();
@@ -3748,8 +3751,8 @@ opengl_renderer::Init_caps() {
         + " Vendor: " + std::string( (char *)glGetString( GL_VENDOR ) )
         + " OpenGL Version: " + oglversion );
 
-    if( !GLEW_VERSION_1_5 ) {
-        ErrorLog( "Requires openGL >= 1.5" );
+    if( !GLEW_VERSION_3_0 ) {
+        ErrorLog( "Requires openGL >= 3.0" ); // technically 1.5 for now, but imgui wants more
         return false;
     }