Add test for the Windows QPixmap conversion functions.

Re-add the part of the QPixmap-tests dealing with the conversion
functions.

Change-Id: I49af7adb0b16e8b380061058815284d15c21c6ed
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>

12 files changed, 301 insertions, 1 deletions

diff --git a/tests/auto/auto.pro b/tests/auto/auto.pro
index abf8bfe..b50613c 100644
--- a/tests/auto/auto.pro
+++ b/tests/auto/auto.pro
@@ -1,3 +1,4 @@
 TEMPLATE = subdirs
 SUBDIRS += \
-    qwinthumbnailtoolbar
+    qwinthumbnailtoolbar \
+    qpixmap
diff --git a/tests/auto/qpixmap/data/icon_32bpp.ico b/tests/auto/qpixmap/data/icon_32bpp.ico
new file mode 100644
index 0000000..dbb55cd
--- /dev/null
+++ b/tests/auto/qpixmap/data/icon_32bpp.ico
diff --git a/tests/auto/qpixmap/data/icon_32bpp_16x16.png b/tests/auto/qpixmap/data/icon_32bpp_16x16.png
new file mode 100644
index 0000000..f23f398
--- /dev/null
+++ b/tests/auto/qpixmap/data/icon_32bpp_16x16.png
diff --git a/tests/auto/qpixmap/data/icon_32bpp_256x256.png b/tests/auto/qpixmap/data/icon_32bpp_256x256.png
new file mode 100644
index 0000000..293f1c5
--- /dev/null
+++ b/tests/auto/qpixmap/data/icon_32bpp_256x256.png
diff --git a/tests/auto/qpixmap/data/icon_32bpp_32x32.png b/tests/auto/qpixmap/data/icon_32bpp_32x32.png
new file mode 100644
index 0000000..bfdb1fe
--- /dev/null
+++ b/tests/auto/qpixmap/data/icon_32bpp_32x32.png
diff --git a/tests/auto/qpixmap/data/icon_32bpp_48x48.png b/tests/auto/qpixmap/data/icon_32bpp_48x48.png
new file mode 100644
index 0000000..7dd2d13
--- /dev/null
+++ b/tests/auto/qpixmap/data/icon_32bpp_48x48.png
diff --git a/tests/auto/qpixmap/data/icon_8bpp.ico b/tests/auto/qpixmap/data/icon_8bpp.ico
new file mode 100644
index 0000000..4341a33
--- /dev/null
+++ b/tests/auto/qpixmap/data/icon_8bpp.ico
diff --git a/tests/auto/qpixmap/data/icon_8bpp_16x16.png b/tests/auto/qpixmap/data/icon_8bpp_16x16.png
new file mode 100644
index 0000000..e9a995e
--- /dev/null
+++ b/tests/auto/qpixmap/data/icon_8bpp_16x16.png
diff --git a/tests/auto/qpixmap/data/icon_8bpp_32x32.png b/tests/auto/qpixmap/data/icon_8bpp_32x32.png
new file mode 100644
index 0000000..41ef57f
--- /dev/null
+++ b/tests/auto/qpixmap/data/icon_8bpp_32x32.png
diff --git a/tests/auto/qpixmap/data/icon_8bpp_48x48.png b/tests/auto/qpixmap/data/icon_8bpp_48x48.png
new file mode 100644
index 0000000..35d60d1
--- /dev/null
+++ b/tests/auto/qpixmap/data/icon_8bpp_48x48.png
diff --git a/tests/auto/qpixmap/qpixmap.pro b/tests/auto/qpixmap/qpixmap.pro
new file mode 100644
index 0000000..7c35cdf
--- /dev/null
+++ b/tests/auto/qpixmap/qpixmap.pro
@@ -0,0 +1,4 @@
+CONFIG += testcase
+TARGET = tst_qpixmap
+QT += gui testlib winextras
+SOURCES += tst_qpixmap.cpp
diff --git a/tests/auto/qpixmap/tst_qpixmap.cpp b/tests/auto/qpixmap/tst_qpixmap.cpp
new file mode 100644
index 0000000..2cc1da0
--- /dev/null
+++ b/tests/auto/qpixmap/tst_qpixmap.cpp
@@ -0,0 +1,295 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+#include <QtCore/qt_windows.h>
+#include <QtCore/QFileInfo>
+#include <QtGui/QPixmap>
+#include <QtGui/QImage>
+#include <QtWinExtras/QWinFunctions>
+
+class tst_QPixmap : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QPixmap() : m_dataDirectory(QFINDTESTDATA("data")) {}
+
+private slots:
+    void initTestCase();
+
+    void toHBITMAP_data();
+    void toHBITMAP();
+    void fromHBITMAP_data();
+    void fromHBITMAP();
+
+    void toHICON_data();
+    void toHICON();
+    void fromHICON_data();
+    void fromHICON();
+
+private:
+    const QString m_dataDirectory;
+};
+
+void tst_QPixmap::initTestCase()
+{
+    QVERIFY(!m_dataDirectory.isEmpty());
+}
+
+void tst_QPixmap::toHBITMAP_data()
+{
+    QTest::addColumn<int>("red");
+    QTest::addColumn<int>("green");
+    QTest::addColumn<int>("blue");
+
+    QTest::newRow("red")   << 255 << 0 << 0;
+    QTest::newRow("green") << 0 << 255 << 0;
+    QTest::newRow("blue")  << 0 << 0 << 255;
+}
+
+void tst_QPixmap::toHBITMAP()
+{
+    QFETCH(int, red);
+    QFETCH(int, green);
+    QFETCH(int, blue);
+
+    QPixmap pm(100, 100);
+    pm.fill(QColor(red, green, blue));
+
+    const HBITMAP bitmap = QWinExtras::toHBITMAP(pm);
+
+    QVERIFY(bitmap != 0);
+
+    // Verify size
+    BITMAP bitmapInfo;
+    memset(&bitmapInfo, 0, sizeof(BITMAP));
+
+    QVERIFY(GetObject(bitmap, sizeof(BITMAP), &bitmapInfo));
+
+    QCOMPARE(100, (int) bitmapInfo.bmWidth);
+    QCOMPARE(100, (int) bitmapInfo.bmHeight);
+
+    const HDC displayDc = GetDC(0);
+    const HDC bitmapDc = CreateCompatibleDC(displayDc);
+
+    const HBITMAP nullBitmap = (HBITMAP) SelectObject(bitmapDc, bitmap);
+
+    const COLORREF pixel = GetPixel(bitmapDc, 0, 0);
+    QCOMPARE((int)GetRValue(pixel), red);
+    QCOMPARE((int)GetGValue(pixel), green);
+    QCOMPARE((int)GetBValue(pixel), blue);
+
+    // Clean up
+    SelectObject(bitmapDc, nullBitmap);
+    DeleteObject(bitmap);
+    DeleteDC(bitmapDc);
+    ReleaseDC(0, displayDc);
+}
+
+void tst_QPixmap::fromHBITMAP_data()
+{
+    toHBITMAP_data();
+}
+
+void tst_QPixmap::fromHBITMAP()
+{
+    QFETCH(int, red);
+    QFETCH(int, green);
+    QFETCH(int, blue);
+
+    const HDC displayDc = GetDC(0);
+    const HDC bitmapDc = CreateCompatibleDC(displayDc);
+    const HBITMAP bitmap = CreateCompatibleBitmap(displayDc, 100, 100);
+    SelectObject(bitmapDc, bitmap);
+
+    SelectObject(bitmapDc, GetStockObject(NULL_PEN));
+    const HGDIOBJ oldBrush = SelectObject(bitmapDc, CreateSolidBrush(RGB(red, green, blue)));
+    Rectangle(bitmapDc, 0, 0, 100, 100);
+
+    const QPixmap pixmap = QWinExtras::fromHBITMAP(bitmap);
+    QCOMPARE(pixmap.width(), 100);
+    QCOMPARE(pixmap.height(), 100);
+
+    const QImage image = pixmap.toImage();
+    const QRgb pixel = image.pixel(0, 0);
+    QCOMPARE(qRed(pixel), red);
+    QCOMPARE(qGreen(pixel), green);
+    QCOMPARE(qBlue(pixel), blue);
+
+    DeleteObject(SelectObject(bitmapDc, oldBrush));
+    DeleteObject(SelectObject(bitmapDc, bitmap));
+    DeleteDC(bitmapDc);
+    ReleaseDC(0, displayDc);
+}
+
+static bool compareImages(const QImage &actual, const QImage &expected,
+                          QByteArray *errorMessage)
+{
+    if (actual.size() != expected.size()) {
+        QString s;
+        QDebug(&s) << "Size mismatch, actual: " << actual.size() << " expected: " << expected.size();
+        *errorMessage = s.toLocal8Bit();
+        return false;
+    }
+    if (actual.format() != expected.format()) {
+        *errorMessage = QByteArrayLiteral("Format mismatch, actual: ")
+            + QByteArray::number(actual.format())
+            + QByteArrayLiteral(", expected: ") + QByteArray::number(expected.format());
+        return false;
+    }
+
+    static const int fuzz = 1;
+
+    for (int y = 0; y < actual.height(); ++y) {
+        for (int x = 0; x < expected.width(); ++x) {
+            const QRgb actualRgb = actual.pixel(x, y);
+            const QRgb expectedRgb = expected.pixel(x, y);
+            const bool pixelMatches =
+                qAbs(qRed(actualRgb) - qRed(expectedRgb)) <= fuzz
+                && qAbs(qGreen(actualRgb) - qGreen(expectedRgb)) <= fuzz
+                && qAbs(qBlue(actualRgb) - qBlue(expectedRgb)) <= fuzz
+                && qAbs(qAlpha(actualRgb) - qAlpha(expectedRgb)) <= fuzz;
+            if (!pixelMatches) {
+                QString s;
+                QDebug(&s) << "Pixmal mismatch at " << x << ',' << y << " actual: "
+                           << QColor(actualRgb) << " expected: " << QColor(expectedRgb);
+                *errorMessage = s.toLocal8Bit();
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+static inline QString pngFileName(const QString &image, int width, int height)
+{
+    return image + QLatin1Char('_') + QString::number(width)
+        + QLatin1Char('x') + QString::number(height) + QStringLiteral(".png");
+}
+
+void tst_QPixmap::toHICON_data()
+{
+    QTest::addColumn<QString>("image");
+    QTest::addColumn<int>("width");
+    QTest::addColumn<int>("height");
+
+    QTest::newRow("32bpp_16x16") << m_dataDirectory + QStringLiteral("/icon_32bpp") << 16 << 16;
+    QTest::newRow("32bpp_32x32") << m_dataDirectory + QStringLiteral("/icon_32bpp") << 32 << 32;
+    QTest::newRow("32bpp_48x48") << m_dataDirectory + QStringLiteral("/icon_32bpp") << 48 << 48;
+    QTest::newRow("32bpp_256x256") << m_dataDirectory + QStringLiteral("/icon_32bpp") << 256 << 256;
+
+    QTest::newRow("8bpp_16x16") << m_dataDirectory + QStringLiteral("/icon_8bpp") << 16 << 16;
+    QTest::newRow("8bpp_32x32") << m_dataDirectory + QStringLiteral("/icon_8bpp") << 32 << 32;
+    QTest::newRow("8bpp_48x48") << m_dataDirectory + QStringLiteral("/icon_8bpp") << 48 << 48;
+}
+
+void tst_QPixmap::toHICON()
+{
+    QFETCH(int, width);
+    QFETCH(int, height);
+    QFETCH(QString, image);
+
+    QPixmap empty(width, height);
+    empty.fill(Qt::transparent);
+
+    const HDC displayDc = GetDC(0);
+    const HDC bitmapDc = CreateCompatibleDC(displayDc);
+    const HBITMAP bitmap = QWinExtras::toHBITMAP(empty, QWinExtras::HBitmapAlpha);
+    SelectObject(bitmapDc, bitmap);
+
+    const QString imageFileName = pngFileName(image, width, height);
+    QVERIFY2(QFileInfo(imageFileName).exists(), qPrintable(imageFileName));
+
+    const QImage imageFromFile = QImage(imageFileName).convertToFormat(QImage::Format_ARGB32_Premultiplied);
+    QVERIFY(!imageFromFile.isNull());
+
+    const HICON icon = QWinExtras::toHICON(QPixmap::fromImage(imageFromFile));
+
+    DrawIconEx(bitmapDc, 0, 0, icon, width, height, 0, 0, DI_NORMAL);
+
+    DestroyIcon(icon);
+    DeleteDC(bitmapDc);
+
+    const QImage imageFromHICON = QWinExtras::fromHBITMAP(bitmap, QWinExtras::HBitmapAlpha).toImage();
+    QVERIFY(!imageFromHICON.isNull());
+
+    ReleaseDC(0, displayDc);
+
+    // fuzzy comparison must be used, as the pixel values change slightly during conversion
+    // between QImage::Format_ARGB32 and QImage::Format_ARGB32_Premultiplied, or elsewhere
+    QByteArray errorMessage;
+    QVERIFY2(compareImages(imageFromHICON, imageFromFile, &errorMessage), errorMessage.constData());
+}
+
+void tst_QPixmap::fromHICON_data()
+{
+    toHICON_data();
+}
+
+void tst_QPixmap::fromHICON()
+{
+    QFETCH(int, width);
+    QFETCH(int, height);
+    QFETCH(QString, image);
+
+    const QString iconFileName = image + QStringLiteral(".ico");
+    QVERIFY2(QFileInfo(iconFileName).exists(), qPrintable(iconFileName));
+
+    const HICON icon = (HICON)LoadImage(0, (wchar_t*)(iconFileName).utf16(), IMAGE_ICON, width, height, LR_LOADFROMFILE);
+    const QImage imageFromHICON = QWinExtras::fromHICON(icon).toImage();
+    DestroyIcon(icon);
+
+    const QString imageFileName = pngFileName(image, width, height);
+    QVERIFY2(QFileInfo(imageFileName).exists(), qPrintable(imageFileName));
+
+    const QImage imageFromFile = QImage(imageFileName).convertToFormat(QImage::Format_ARGB32_Premultiplied);
+    QVERIFY(!imageFromFile.isNull());
+
+    // fuzzy comparison must be used, as the pixel values change slightly during conversion
+    // between QImage::Format_ARGB32 and QImage::Format_ARGB32_Premultiplied, or elsewhere
+    QByteArray errorMessage;
+    QVERIFY2(compareImages(imageFromHICON, imageFromFile, &errorMessage), errorMessage.constData());
+}
+
+QTEST_MAIN(tst_QPixmap)
+
+#include "tst_qpixmap.moc"