Downscale textures which exceed the GL texture limit

This way they will at least render.

[ChangeLog][QtQuick] Images exceeding GL_MAX_TEXTURE_SIZE will be
downscaled to fit so they will still show.

Change-Id: I169ecac768036812b8e14265ec1a0a8902655666
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

4 files changed, 77 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickimage/data/hugeImages.qml b/tests/auto/quick/qquickimage/data/hugeImages.qml
new file mode 100644
index 0000000000..f195299693
--- /dev/null
+++ b/tests/auto/quick/qquickimage/data/hugeImages.qml
@@ -0,0 +1,60 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Jolla Ltd, author: <gunnar.sletta@jollamobile.com>
+** 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+
+Item {
+    width: 200
+    height: 200
+
+    Image {
+        source: "toowide.png"
+        width: 100
+        height: 100
+    }
+
+    Image {
+        x: 100
+        source: "tootall.png"
+        width: 100
+        height: 100
+    }
+}
diff --git a/tests/auto/quick/qquickimage/data/tootall.png b/tests/auto/quick/qquickimage/data/tootall.png
new file mode 100644
index 0000000000..98d0f18ec1
--- /dev/null
+++ b/tests/auto/quick/qquickimage/data/tootall.png
diff --git a/tests/auto/quick/qquickimage/data/toowide.png b/tests/auto/quick/qquickimage/data/toowide.png
new file mode 100644
index 0000000000..4a0a92c651
--- /dev/null
+++ b/tests/auto/quick/qquickimage/data/toowide.png
diff --git a/tests/auto/quick/qquickimage/tst_qquickimage.cpp b/tests/auto/quick/qquickimage/tst_qquickimage.cpp
index a68a763887..3b70c680e9 100644
--- a/tests/auto/quick/qquickimage/tst_qquickimage.cpp
+++ b/tests/auto/quick/qquickimage/tst_qquickimage.cpp
@@ -56,6 +56,7 @@
 #include <QtGui/QPainter>
 #include <QtGui/QImageReader>
 #include <QQuickWindow>
+#include <QQuickView>
 #include <QQuickImageProvider>
 
 #include "../../shared/util.h"
@@ -106,6 +107,7 @@ private slots:
     void sourceSizeChanges();
     void correctStatus();
     void highdpi();
+    void hugeImages();
 
 private:
     QQmlEngine engine;
@@ -969,6 +971,21 @@ void tst_qquickimage::highdpi()
     delete obj;
 }
 
+void tst_qquickimage::hugeImages()
+{
+    QQuickView view;
+    view.setSource(testFileUrl("hugeImages.qml"));
+    view.setGeometry(0, 0, 200, 200);
+    view.create();
+
+    QImage contents = view.grabWindow();
+
+    QCOMPARE(contents.pixel(0, 0), qRgba(255, 0, 0, 255));
+    QCOMPARE(contents.pixel(99, 99), qRgba(255, 0, 0, 255));
+    QCOMPARE(contents.pixel(100, 0), qRgba(0, 0, 255, 255));
+    QCOMPARE(contents.pixel(199, 99), qRgba(0, 0, 255, 255));
+}
+
 QTEST_MAIN(tst_qquickimage)
 
 #include "tst_qquickimage.moc"