Say hello to QQuickItem::grabToImage().

[ChangeLog][QtQuick][Item] Added functions QQuickItem::grabToImage()
and Item::grabToImage() to allow grabbing of items into
system-memory images.

Change-Id: I76cd73bb62f7440569c6fce63d63528559845721
Reviewed-by: Michael Brasser <michael.brasser@live.com>

1 files changed, 160 insertions, 0 deletions

diff --git a/tests/auto/qmltest/itemgrabber/tst_itemgrabber.qml b/tests/auto/qmltest/itemgrabber/tst_itemgrabber.qml
new file mode 100644
index 0000000000..4f827bbf33
--- /dev/null
+++ b/tests/auto/qmltest/itemgrabber/tst_itemgrabber.qml
@@ -0,0 +1,160 @@
+/****************************************************************************
+**
+** 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 2.4
+import QtTest 1.0
+
+Item {
+    id: root;
+    width: 400
+    height: 400
+
+    TestCase {
+        id: testCase
+        name: "item-grabber"
+        when: imageOnDisk.ready && imageOnDiskSmall.ready && imageInCache.ready && imageInCacheSmall.ready
+        function test_endresult() {
+            var image = grabImage(root);
+
+            // imageOnDisk at (0, 0) - (100x100)
+            compare(imageOnDisk.width, 100);
+            compare(imageOnDisk.height, 100);
+            verify(image.pixel(0, 0) === Qt.rgba(1, 0, 0, 1)); // Use verify because compare doesn't support colors (QTBUG-34878)
+            verify(image.pixel(99, 99) === Qt.rgba(0, 0, 1, 1));
+
+            // imageOnDiskSmall at (100, 0) - 50x50
+            compare(imageOnDiskSmall.width, 50);
+            compare(imageOnDiskSmall.height, 50);
+            verify(image.pixel(100, 0) === Qt.rgba(1, 0, 0, 1));
+            verify(image.pixel(149, 49) === Qt.rgba(0, 0, 1, 1));
+
+            // imageInCache at (0, 100) - 100x100
+            compare(imageInCache.width, 100);
+            compare(imageInCache.height, 100);
+            verify(image.pixel(0, 100) === Qt.rgba(1, 0, 0, 1));
+            verify(image.pixel(99, 199) === Qt.rgba(0, 0, 1, 1));
+
+            // imageInCacheSmall at (100, 100) - 50x50
+            compare(imageInCacheSmall.width, 50);
+            compare(imageInCacheSmall.height, 50);
+            verify(image.pixel(100, 100) === Qt.rgba(1, 0, 0, 1));
+            verify(image.pixel(149, 149) === Qt.rgba(0, 0, 1, 1));
+
+            // After all that has been going on, it should only have been called that one time..
+            compare(imageOnDisk.callCount, 1);
+        }
+
+        onWindowShownChanged: {
+            box.grabToImage(imageOnDisk.handleGrab);
+            box.grabToImage(imageOnDiskSmall.handleGrab, Qt.size(50, 50));
+            box.grabToImage(imageInCache.handleGrab);
+            box.grabToImage(imageInCacheSmall.handleGrab, Qt.size(50, 50));
+        }
+
+    }
+
+    Rectangle {
+        id: box
+        width: 100
+        height: 100
+        color: "red";
+
+        visible: false
+
+        Rectangle {
+            anchors.bottom: parent.bottom;
+            anchors.right: parent.right;
+            width: 10
+            height: 10
+            color: "blue";
+        }
+    }
+
+    Image {
+        id: imageOnDisk
+        x: 0
+        y: 0
+        property int callCount: 0;
+        property bool ready: false;
+        function handleGrab(result) {
+            if (!result.saveToFile("image.png"))
+                print("Error: Failed to save image to disk...");
+            source = "image.png";
+            ready = true;
+            ++callCount;
+        }
+    }
+
+    Image {
+        id: imageOnDiskSmall
+        x: 100
+        y: 0
+        property bool ready: false;
+        function handleGrab(result) {
+            if (!result.saveToFile("image_small.png"))
+                print("Error: Failed to save image to disk...");
+            source = "image_small.png";
+            ready = true;
+        }
+    }
+
+    Image {
+        id: imageInCache
+        x: 0
+        y: 100
+        property bool ready: false;
+        function handleGrab(result) {
+            source = result.url;
+            ready = true;
+        }
+    }
+
+    Image {
+        id: imageInCacheSmall
+        x: 100
+        y: 100
+        property bool ready: false;
+        function handleGrab(result) {
+            source = result.url;
+            ready = true;
+        }
+    }
+}