UniformValue: fix size in call to memcpy for QMatrix4x4 inputs

There was another layer of sizeof applied to what should have been
the size, resulting in a size of 4/8 on (32/64)-bit platforms
instead of the intended 64 bytes.

Added a test.

Coverity-Id: 171502
Change-Id: I937a1c7ede728d54a57ea5a1278cb9a198d514a2
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/auto/render/uniform/tst_uniform.cpp b/tests/auto/render/uniform/tst_uniform.cpp
index 4a7f086e9..255b79646 100644
--- a/tests/auto/render/uniform/tst_uniform.cpp
+++ b/tests/auto/render/uniform/tst_uniform.cpp
@@ -254,6 +254,30 @@ private Q_SLOTS:
             QCOMPARE(v.constData<float>()[2], 454.0f);
             QCOMPARE(v.constData<float>()[3], 1584.0f);
         }
+        {
+            // GIVEN
+            UniformValue v = UniformValue::fromVariant(QVariant::fromValue(QMatrix4x4()));
+            // THEN
+            QCOMPARE(v.constData<float>()[ 0], 1.0f);
+            QCOMPARE(v.constData<float>()[ 1], 0.0f);
+            QCOMPARE(v.constData<float>()[ 2], 0.0f);
+            QCOMPARE(v.constData<float>()[ 3], 0.0f);
+
+            QCOMPARE(v.constData<float>()[ 4], 0.0f);
+            QCOMPARE(v.constData<float>()[ 5], 1.0f);
+            QCOMPARE(v.constData<float>()[ 6], 0.0f);
+            QCOMPARE(v.constData<float>()[ 7], 0.0f);
+
+            QCOMPARE(v.constData<float>()[ 8], 0.0f);
+            QCOMPARE(v.constData<float>()[ 9], 0.0f);
+            QCOMPARE(v.constData<float>()[10], 1.0f);
+            QCOMPARE(v.constData<float>()[11], 0.0f);
+
+            QCOMPARE(v.constData<float>()[12], 0.0f);
+            QCOMPARE(v.constData<float>()[13], 0.0f);
+            QCOMPARE(v.constData<float>()[14], 0.0f);
+            QCOMPARE(v.constData<float>()[15], 1.0f);
+        }
     }
 
     void checkComparison()