eglfs: Print the chosen config in debug mode

q_printEglConfig has been left unused. Start using it again,
in case QT_QPA_EGLFS_DEBUG is set. This will, similarly to QSG_INFO,
help debugging, especially on embedded devices.

Change-Id: I1448632ed055dd71e98259f042d3cac64620a4ce
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/platformsupport/eglconvenience/qeglplatformcontext.cpp b/src/platformsupport/eglconvenience/qeglplatformcontext.cpp
index 9c3b9b539c..0dcb9f68bb 100644
--- a/src/platformsupport/eglconvenience/qeglplatformcontext.cpp
+++ b/src/platformsupport/eglconvenience/qeglplatformcontext.cpp
@@ -44,6 +44,7 @@
 #include "qeglpbuffer_p.h"
 #include <qpa/qplatformwindow.h>
 #include <QOpenGLContext>
+#include <QDebug>
 
 QT_BEGIN_NAMESPACE
 
@@ -191,6 +192,12 @@ void QEGLPlatformContext::init(const QSurfaceFormat &format, QPlatformOpenGLCont
         return;
     }
 
+    static const bool printConfig = qgetenv("QT_QPA_EGLFS_DEBUG").toInt();
+    if (printConfig) {
+        qDebug() << "Created context for format" << format << "with config:";
+        q_printEglConfig(m_eglDisplay, m_eglConfig);
+    }
+
 #ifndef QT_NO_OPENGL
     // Make the context current to ensure the GL version query works. This needs a surface too.
     const EGLint pbufferAttributes[] = {