From 4d67544fdaf902802791a2f6b6e96300af906195 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Wed, 16 Dec 2015 11:56:27 +0100
Subject: [PATCH] Try to explicitly enable debug output in GL tests.

---
 src/Magnum/Test/AbstractOpenGLTester.h | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/Magnum/Test/AbstractOpenGLTester.h b/src/Magnum/Test/AbstractOpenGLTester.h
index 460306383..25d255280 100644
--- a/src/Magnum/Test/AbstractOpenGLTester.h
+++ b/src/Magnum/Test/AbstractOpenGLTester.h
@@ -57,12 +57,25 @@ class AbstractOpenGLTester: public TestSuite::Tester {
 
     private:
         struct WindowlessApplication: Platform::WindowlessApplication {
-            explicit WindowlessApplication(const Arguments& arguments): Platform::WindowlessApplication{arguments} {}
+            explicit WindowlessApplication(const Arguments& arguments): Platform::WindowlessApplication{arguments, nullptr} {}
             int exec() override final { return 0; }
+
+            using Platform::WindowlessApplication::tryCreateContext;
+            using Platform::WindowlessApplication::createContext;
+
         } _windowlessApplication;
 };
 
 AbstractOpenGLTester::AbstractOpenGLTester(): _windowlessApplication{*_windowlessApplicationArguments} {
+    /* Try to create debug context, fallback to normal one if not possible. No
+       such thing on OSX. */
+    #ifndef CORRADE_TARGET_APPLE
+    if(!_windowlessApplication.tryCreateContext(Platform::WindowlessApplication::Configuration{}.setFlags(Platform::WindowlessApplication::Configuration::Flag::Debug)))
+        _windowlessApplication.createContext();
+    #else
+    _windowlessApplication.createContext();
+    #endif
+
     if(Context::current()->isExtensionSupported<Extensions::GL::KHR::debug>()) {
         Renderer::enable(Renderer::Feature::DebugOutput);
         Renderer::enable(Renderer::Feature::DebugOutputSynchronous);