From ab6a22fd0d414a8c7a9c3875cf1599516c0c6ff3 Mon Sep 17 00:00:00 2001
From: aavit <qt-info@nokia.com>
Date: Mon, 30 Aug 2010 09:46:10 +0200
Subject: Experiment with generating and storing the diff image also on failure

---
 tests/auto/lancelot/tst_lancelot.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tests/auto/lancelot/tst_lancelot.cpp b/tests/auto/lancelot/tst_lancelot.cpp
index 1b832c6..f1c6e5c 100644
--- a/tests/auto/lancelot/tst_lancelot.cpp
+++ b/tests/auto/lancelot/tst_lancelot.cpp
@@ -160,6 +160,19 @@ void tst_Lancelot::testRendering()
     if (rendered != baseline) {
         QByteArray failMsg;
         proto.submitMismatch(fileName, rendered, &failMsg);
+
+#if 1
+        // Also generate & submit the diff image
+        QImage diff(rendered.size(), QImage::Format_RGB32);
+        diff.fill(0);
+        QPainter p(&diff);
+        p.drawImage(0, 0, rendered);
+        p.setCompositionMode(QPainter::RasterOp_SourceXorDestination);
+        p.drawImage(0, 0, baseline);
+        p.end();
+        proto.submitMismatch(fileName + QLatin1String("_diff"), diff, 0);
+#endif
+
         failMsg.prepend("Rendered image differs from baseline. ");
         QFAIL(failMsg.constData());
     }
-- 
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