Add 'mirror' property to Image element.

Setting mirror to true will horizontally invert an image. This feature
is part of the task to support RTL in QML (see QTBUG-11042).

Task-number: QTBUG-15878
Reviewed-by: Joona Petrell

3 files changed, 109 insertions, 0 deletions

diff --git a/tests/auto/declarative/qdeclarativeanimatedimage/data/hearts.gif b/tests/auto/declarative/qdeclarativeanimatedimage/data/hearts.gif
new file mode 100644
index 0000000..cfb55f2
--- /dev/null
+++ b/tests/auto/declarative/qdeclarativeanimatedimage/data/hearts.gif
diff --git a/tests/auto/declarative/qdeclarativeanimatedimage/data/hearts.qml b/tests/auto/declarative/qdeclarativeanimatedimage/data/hearts.qml
new file mode 100644
index 0000000..8729dd2
--- /dev/null
+++ b/tests/auto/declarative/qdeclarativeanimatedimage/data/hearts.qml
@@ -0,0 +1,6 @@
+import QtQuick 1.0
+
+AnimatedImage {
+    source: "hearts.gif"
+    playing: false
+}
diff --git a/tests/auto/declarative/qdeclarativeanimatedimage/tst_qdeclarativeanimatedimage.cpp b/tests/auto/declarative/qdeclarativeanimatedimage/tst_qdeclarativeanimatedimage.cpp
index 8cbe813..bd701e7 100644
--- a/tests/auto/declarative/qdeclarativeanimatedimage/tst_qdeclarativeanimatedimage.cpp
+++ b/tests/auto/declarative/qdeclarativeanimatedimage/tst_qdeclarativeanimatedimage.cpp
@@ -45,6 +45,7 @@
 #include <private/qdeclarativerectangle_p.h>
 #include <private/qdeclarativeimage_p.h>
 #include <private/qdeclarativeanimatedimage_p.h>
+#include <QSignalSpy>
 
 #include "../shared/testhttpserver.h"
 #include "../../../shared/util.h"
@@ -66,13 +67,28 @@ private slots:
     void stopped();
     void setFrame();
     void frameCount();
+    void mirror_running();
+    void mirror_notRunning();
+    void mirror_notRunning_data();
     void remote();
     void remote_data();
     void sourceSize();
     void sourceSizeReadOnly();
     void invalidSource();
+
+private:
+    QPixmap grabScene(QGraphicsScene *scene, int width, int height);
 };
 
+QPixmap tst_qdeclarativeanimatedimage::grabScene(QGraphicsScene *scene, int width, int height)
+{
+    QPixmap screenshot(width, height);
+    screenshot.fill();
+    QPainter p_screenshot(&screenshot);
+    scene->render(&p_screenshot, QRect(0, 0, width, height), QRect(0, 0, width, height));
+    return screenshot;
+}
+
 void tst_qdeclarativeanimatedimage::play()
 {
     QDeclarativeEngine engine;
@@ -132,6 +148,93 @@ void tst_qdeclarativeanimatedimage::frameCount()
     delete anim;
 }
 
+void tst_qdeclarativeanimatedimage::mirror_running()
+{
+    // test where mirror is set to true after animation has started
+
+    QDeclarativeEngine engine;
+    QDeclarativeComponent component(&engine, QUrl::fromLocalFile(SRCDIR "/data/hearts.qml"));
+    QDeclarativeAnimatedImage *anim = qobject_cast<QDeclarativeAnimatedImage *>(component.create());
+    QVERIFY(anim);
+
+    QGraphicsScene scene;
+    int width = anim->property("width").toInt();
+    int height = anim->property("height").toInt();
+    scene.addItem(qobject_cast<QGraphicsObject *>(anim));
+
+    QCOMPARE(anim->currentFrame(), 0);
+    QPixmap frame0 = grabScene(&scene, width, height);
+    anim->setCurrentFrame(1);
+    QPixmap frame1 = grabScene(&scene, width, height);
+
+    anim->setCurrentFrame(0);
+
+    QSignalSpy spy(anim, SIGNAL(frameChanged()));
+    anim->setPlaying(true);
+
+    QTRY_VERIFY(spy.count() == 1); spy.clear();
+    anim->setProperty("mirror", true);
+
+    QCOMPARE(anim->currentFrame(), 1);
+    QPixmap frame1_flipped = grabScene(&scene, width, height);
+
+    QTRY_VERIFY(spy.count() == 1); spy.clear();
+    QCOMPARE(anim->currentFrame(), 0);  // animation only has 2 frames, should cycle back to first
+    QPixmap frame0_flipped = grabScene(&scene, width, height);
+
+    QTransform transform;
+    transform.translate(width, 0).scale(-1, 1.0);
+    QPixmap frame0_expected = frame0.transformed(transform);
+    QPixmap frame1_expected = frame1.transformed(transform);
+
+    QCOMPARE(frame0_flipped, frame0_expected);
+    QCOMPARE(frame1_flipped, frame1_expected);
+}
+
+void tst_qdeclarativeanimatedimage::mirror_notRunning()
+{
+    QFETCH(QUrl, fileUrl);
+
+    QDeclarativeEngine engine;
+    QDeclarativeComponent component(&engine, fileUrl);
+    QDeclarativeAnimatedImage *anim = qobject_cast<QDeclarativeAnimatedImage *>(component.create());
+    QVERIFY(anim);
+
+    QGraphicsScene scene;
+    int width = anim->property("width").toInt();
+    int height = anim->property("height").toInt();
+    scene.addItem(qobject_cast<QGraphicsObject *>(anim));
+    QPixmap screenshot = grabScene(&scene, width, height);
+
+    QTransform transform;
+    transform.translate(width, 0).scale(-1, 1.0);
+    QPixmap expected = screenshot.transformed(transform);
+
+    int frame = anim->currentFrame();
+    bool playing = anim->isPlaying();
+    bool paused = anim->isPlaying();
+
+    anim->setProperty("mirror", true);
+    screenshot = grabScene(&scene, width, height);
+
+    QCOMPARE(screenshot, expected);
+
+    // mirroring should not change the current frame or playing status
+    QCOMPARE(anim->currentFrame(), frame);
+    QCOMPARE(anim->isPlaying(), playing);
+    QCOMPARE(anim->isPaused(), paused);
+
+    delete anim;
+}
+
+void tst_qdeclarativeanimatedimage::mirror_notRunning_data()
+{
+    QTest::addColumn<QUrl>("fileUrl");
+
+    QTest::newRow("paused") << QUrl::fromLocalFile(SRCDIR "/data/stickmanpause.qml");
+    QTest::newRow("stopped") << QUrl::fromLocalFile(SRCDIR "/data/stickmanstopped.qml");
+}
+
 void tst_qdeclarativeanimatedimage::remote()
 {
     QFETCH(QString, fileName);