From 54126e4571d879cd2d7118df93e5fb5a39654843 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Mon, 18 Jul 2016 20:50:56 +0200
Subject: [PATCH] [plugins/qpa] Check egl error after a failure of
 eglMakeCurrent

This hopefully helps to figure out why eglMakeCurrent fails on
hwcomposer platform.
---
 plugins/qpa/sharingplatformcontext.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/plugins/qpa/sharingplatformcontext.cpp b/plugins/qpa/sharingplatformcontext.cpp
index db844412c3..72c84a84ca 100644
--- a/plugins/qpa/sharingplatformcontext.cpp
+++ b/plugins/qpa/sharingplatformcontext.cpp
@@ -47,6 +47,10 @@ bool SharingPlatformContext::makeCurrent(QPlatformSurface *surface)
         return true;
     }
     qCWarning(KWIN_QPA) << "Failed to make context current";
+    EGLint error = eglGetError();
+    if (error != EGL_SUCCESS) {
+        qCWarning(KWIN_QPA) << "EGL error code: " << error;
+    }
 
     return false;
 }