From fc9a2f45d6b79c4ace504cb3e8d330f5d54ab7bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Fri, 6 Nov 2020 22:14:54 +0100
Subject: [PATCH] Platform: clear the framebuffer in Sdl2Application test.

It's unnecessarily hard to verify behavioral consistency across
different app implementations without.
---
 src/Magnum/Platform/Test/Sdl2ApplicationTest.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Magnum/Platform/Test/Sdl2ApplicationTest.cpp b/src/Magnum/Platform/Test/Sdl2ApplicationTest.cpp
index 7904b1a90..3f4810470 100644
--- a/src/Magnum/Platform/Test/Sdl2ApplicationTest.cpp
+++ b/src/Magnum/Platform/Test/Sdl2ApplicationTest.cpp
@@ -31,6 +31,7 @@
 
 #include "Magnum/ImageView.h"
 #include "Magnum/Math/ConfigurationValue.h"
+#include "Magnum/GL/DefaultFramebuffer.h"
 #include "Magnum/Platform/Sdl2Application.h"
 #include "Magnum/Trade/AbstractImporter.h"
 #include "Magnum/Trade/ImageData.h"
@@ -68,6 +69,8 @@ struct Sdl2ApplicationTest: Platform::Application {
 
     void drawEvent() override {
         Debug{} << "draw event";
+        GL::defaultFramebuffer.clear(GL::FramebufferClear::Color);
+
         swapBuffers();
     }