Stabilize image and borderimage multiFrame tests

There are various problems on QEMU: color depth may not be 32-bit,
and for some reason grabWindow isn't always working.

Task-number: QTBUG-77817
Change-Id: I10db56e93643722d1d6a85e66b9dd552ee654432
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

2 files changed, 28 insertions, 10 deletions

diff --git a/tests/auto/quick/qquickborderimage/tst_qquickborderimage.cpp b/tests/auto/quick/qquickborderimage/tst_qquickborderimage.cpp
index 4181f46551..dc3a783600 100644
--- a/tests/auto/quick/qquickborderimage/tst_qquickborderimage.cpp
+++ b/tests/auto/quick/qquickborderimage/tst_qquickborderimage.cpp
@@ -46,6 +46,8 @@
 #include "../../shared/util.h"
 #include "../shared/visualtestutil.h"
 
+Q_LOGGING_CATEGORY(lcTests, "qt.quick.tests")
+
 Q_DECLARE_METATYPE(QQuickImageBase::Status)
 
 class tst_qquickborderimage : public QQmlDataTest
@@ -615,6 +617,10 @@ void tst_qquickborderimage::multiFrame_data()
 
 void tst_qquickborderimage::multiFrame()
 {
+    if ((QGuiApplication::platformName() == QLatin1String("offscreen"))
+        || (QGuiApplication::platformName() == QLatin1String("minimal")))
+        QSKIP("Skipping due to grabWindow not functional on offscreen/minimimal platforms");
+
     QFETCH(QString, qmlfile);
     QFETCH(bool, asynchronous);
     Q_UNUSED(asynchronous)
@@ -634,24 +640,30 @@ void tst_qquickborderimage::multiFrame()
     QCOMPARE(image->currentFrame(), 0);
     view.show();
     QVERIFY(QTest::qWaitForWindowExposed(&view));
+    QCoreApplication::processEvents(); // Process all queued events
 
     QImage contents = view.grabWindow();
-    // The first frame looks blue, approximately qRgba(0x43, 0x7e, 0xd6, 0xff)
-    QRgb color = contents.pixel(60, 60);
-    QVERIFY(qRed(color) < 0xc0);
-    QVERIFY(qGreen(color) < 0xc0);
-    QVERIFY(qBlue(color) > 0xc0);
+    if (contents.width() < 160)
+        QSKIP("Skipping due to grabWindow not functional");
+
+    // The middle of the first frame looks blue, approximately qRgba(0x43, 0x7e, 0xd6, 0xff)
+    QColor color = contents.pixelColor(60, 60);
+    qCDebug(lcTests) << "expected bluish color, got" << color;
+    QVERIFY(color.redF() < 0.75);
+    QVERIFY(color.greenF() < 0.75);
+    QVERIFY(color.blueF() > 0.75);
 
     image->setCurrentFrame(1);
     QTRY_COMPARE(image->status(), QQuickImageBase::Ready);
     QCOMPARE(currentSpy.count(), 1);
     QCOMPARE(image->currentFrame(), 1);
     contents = view.grabWindow();
-    // The second frame looks green, approximately qRgba(0x3a, 0xd2, 0x31, 0xff)
-    color = contents.pixel(60, 60);
-    QVERIFY(qRed(color) < 0xc0);
-    QVERIFY(qGreen(color) > 0xc0);
-    QVERIFY(qBlue(color) < 0xc0);
+    // The middle of the second frame looks green, approximately qRgba(0x3a, 0xd2, 0x31, 0xff)
+    color = contents.pixelColor(60, 60);
+    qCDebug(lcTests) << "expected greenish color, got" << color;
+    QVERIFY(color.redF() < 0.75);
+    QVERIFY(color.green() > 0.75);
+    QVERIFY(color.blueF() < 0.75);
 }
 
 QTEST_MAIN(tst_qquickborderimage)
diff --git a/tests/auto/quick/qquickimage/tst_qquickimage.cpp b/tests/auto/quick/qquickimage/tst_qquickimage.cpp
index 23635590e4..abc7cd86bd 100644
--- a/tests/auto/quick/qquickimage/tst_qquickimage.cpp
+++ b/tests/auto/quick/qquickimage/tst_qquickimage.cpp
@@ -1145,6 +1145,10 @@ void tst_qquickimage::multiFrame_data()
 
 void tst_qquickimage::multiFrame()
 {
+    if ((QGuiApplication::platformName() == QLatin1String("offscreen"))
+        || (QGuiApplication::platformName() == QLatin1String("minimal")))
+        QSKIP("Skipping due to grabWindow not functional on offscreen/minimimal platforms");
+
     QFETCH(QString, qmlfile);
     QFETCH(bool, asynchronous);
     Q_UNUSED(asynchronous)
@@ -1166,6 +1170,8 @@ void tst_qquickimage::multiFrame()
     QVERIFY(QTest::qWaitForWindowExposed(&view));
 
     QImage contents = view.grabWindow();
+    if (contents.width() < 40)
+        QSKIP("Skipping due to grabWindow not functional");
     // The first frame is a blue ball, approximately qRgba(0x33, 0x6d, 0xcc, 0xff)
     QRgb color = contents.pixel(16, 16);
     QVERIFY(qRed(color) < 0xc0);