qt 6.5.1 original

tests/benchmarks/plugins/imageformats/jpeg/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## jpeg Binary:
+#####################################################################
+
+qt_internal_add_benchmark(jpeg
+    SOURCES
+        jpeg.cpp
+    LIBRARIES
+        Qt::Gui
+        Qt::Test
+)

tests/benchmarks/plugins/imageformats/jpeg/jpeg.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QDebug>
+#include <qtest.h>
+#include <QTest>
+#include <QFile>
+#include <QByteArray>
+#include <QBuffer>
+#include <QImageReader>
+#include <QSize>
+
+class tst_jpeg : public QObject
+{
+    Q_OBJECT
+private slots:
+    void jpegDecodingQtWebkitStyle();
+};
+
+void tst_jpeg::jpegDecodingQtWebkitStyle()
+{
+    // QtWebkit currently calls size() to get the image size for layouting purposes.
+    // Then when it is in the viewport (we assume that here) it actually gets decoded.
+    QString testFile = QFINDTESTDATA("n900.jpeg");
+    QVERIFY2(!testFile.isEmpty(), "cannot find test file n900.jpeg!");
+    QFile inputJpeg(testFile);
+    QVERIFY(inputJpeg.exists());
+    inputJpeg.open(QIODevice::ReadOnly);
+    QByteArray imageData = inputJpeg.readAll();
+    QBuffer buffer;
+    buffer.setData(imageData);
+    buffer.open(QBuffer::ReadOnly);
+    QCOMPARE(buffer.size(), qint64(19016));
+
+
+    QBENCHMARK{
+        for (int i = 0; i < 50; i++) {
+            QImageReader reader(&buffer, "jpeg");
+            QSize size = reader.size();
+            QVERIFY(!size.isNull());
+            QByteArray format = reader.format();
+            QVERIFY(!format.isEmpty());
+            QImage img = reader.read();
+            QVERIFY(!img.isNull());
+            buffer.reset();
+        }
+    }
+}
+
+QTEST_MAIN(tst_jpeg)
+
+#include "jpeg.moc"