qt 6.5.1 original

tests/manual/qimagereader/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## qimagereader Binary:
+#####################################################################
+
+qt_internal_add_manual_test(qimagereader
+    GUI
+    SOURCES
+        main.cpp
+    LIBRARIES
+        Qt::Gui
+        Qt::Widgets
+)

tests/manual/qimagereader/main.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 <QWidget>
+#include <QHBoxLayout>
+#include <QApplication>
+#include <QPainter>
+#include <QImage>
+#include <QImageReader>
+
+class MyWidget : public QWidget
+{
+public:
+    MyWidget(QWidget * parent, const QString &imagefname, bool scaleImage)
+            : QWidget(parent), fileName(imagefname), scale(scaleImage)
+    {
+
+    }
+
+    virtual void paintEvent(QPaintEvent * /*event*/)
+    {
+        QPainter painter(this);
+        QImageReader reader(fileName);
+        if (!reader.canRead()) {
+            qWarning("Unable to read image file %s", fileName.toLocal8Bit().constData());
+            return;
+        }
+        if (!scale){
+            QImage image = reader.read();
+            painter.drawImage(rect(), image);
+        }else{
+            reader.setScaledSize( QSize(rect().width(), rect().height()) );
+            QImage image = reader.read();
+            painter.drawImage(rect(), image);
+        }
+    }
+
+private:
+    QString fileName;
+    bool scale;
+
+};
+
+
+
+// both the scaled and unscaled version of the CMYK encoded JPEG
+//      should have the same colors and not look corrupted.
+
+int main(int argc, char** argv)
+{
+    QApplication app(argc, argv);
+
+    QWidget mainWidget;
+    mainWidget.setWindowTitle("Colors in images are identical?");
+    mainWidget.setMinimumSize(400,400);
+    QHBoxLayout *l = new QHBoxLayout;
+    MyWidget *w1 = new MyWidget(&mainWidget,"Qt_logostrap_CMYK.jpg", false);
+    MyWidget *w2 = new MyWidget(&mainWidget,"Qt_logostrap_CMYK.jpg", true);
+    l->addWidget(w1);
+    l->addWidget(w2);
+    mainWidget.setLayout(l);
+    mainWidget.show();
+
+    return app.exec();
+}
+

tests/manual/qimagereader/qimagereader.pro

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+QT += widgets
+SOURCES += main.cpp