diff --git a/lib/ui/menus/main_menu.rb b/lib/ui/menus/main_menu.rb
index f13c42a..ff65aec 100644
--- a/lib/ui/menus/main_menu.rb
+++ b/lib/ui/menus/main_menu.rb
@@ -20,12 +20,34 @@ class IMICFPS
window.close
end
+ gl_version = glGetString(GL_VERSION).to_s
+ major, minor = gl_version.split(" ").first.split(".").map { |v| v.to_i }
+ unless major >= 3 && minor >= 3
+message =
+"[Notice] Your computer is reporting support for OpenGL #{major}.#{minor},
+however OpenGL 3.3 or higher is required.
+
+Fallback immediate mode renderer will be used."
+
+linux_mesa_message =
+"
+
+(Linux Only) For MESA based drivers append --mesa-override
+as a commandline argument to override reported version."
+ message += linux_mesa_message if RUBY_PLATFORM =~ /linux/ && gl_version.downcase.include?(" mesa ")
+ @old_gl_warning = Gosu::Image.from_markup(message, 24, align: :center)
+ end
+
@text = CyberarmEngine::Text.new("#{IMICFPS::NAME} v#{IMICFPS::VERSION} (#{IMICFPS::RELEASE_NAME})")
end
def draw
super
+ if @old_gl_warning
+ @old_gl_warning.draw(window.width / 2 - @old_gl_warning.width / 2, window.height - (@old_gl_warning.height + 10), Float::INFINITY)
+ end
+
@text.draw
@text.x = window.width - (@text.width + 10)
@text.y = window.height - (@text.height + 10)