Backported QML ShaderEffectItem from QML2.0 into Qt Quick 1.1

This issue is about backporting Scenegraph's ShaderEffectItem and ShaderEffectSource elements into Qt Quick 1.1 as a Qt labs plugin.
Purpose of these elements is to provide an interface for utilizing OpenGL shaders in QML applications.

Task-number: QTBUG-18346
Reviewed-by: Kim Gronholm

4 files changed, 305 insertions, 0 deletions

diff --git a/tests/auto/declarative/declarative.pro b/tests/auto/declarative/declarative.pro
index 1f0d32a..1bcc26f 100644
--- a/tests/auto/declarative/declarative.pro
+++ b/tests/auto/declarative/declarative.pro
@@ -79,5 +79,7 @@ contains(QT_CONFIG, webkit) {
            qdeclarativewebview
 }
 
+contains(QT_CONFIG, opengl): SUBDIRS += qmlshadersplugin
+
 # Tests which should run in Pulse
 PULSE_TESTS = $$SUBDIRS
diff --git a/tests/auto/declarative/qmlshadersplugin/main.qml b/tests/auto/declarative/qmlshadersplugin/main.qml
new file mode 100644
index 0000000..fc80b39
--- /dev/null
+++ b/tests/auto/declarative/qmlshadersplugin/main.qml
@@ -0,0 +1,80 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QML Shaders plugin of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 1.0
+import Qt.labs.shaders 1.0
+
+ Rectangle {
+     width: 300
+     height: 300
+
+     Text {
+         id: textLabel
+         text: "Hello World"
+         anchors.centerIn: parent
+         font.pixelSize: 48
+     }
+
+     ShaderEffectItem {
+         objectName: "effectItem"
+         property variant source: ShaderEffectSource { objectName: "effectSource"; sourceItem: textLabel; hideSource: true }
+         property real wiggleAmount: 0.01
+         anchors.fill: textLabel
+
+         SequentialAnimation on wiggleAmount {
+             loops: Animation.Infinite
+             NumberAnimation { to: -0.01; duration: 500 }
+             NumberAnimation { to: 0.01; duration: 500 }
+         }
+
+         fragmentShader: "
+         varying highp vec2 qt_TexCoord0;
+         uniform sampler2D source;
+         uniform highp float wiggleAmount;
+         void main(void)
+         {
+             highp vec2 wiggledTexCoord = qt_TexCoord0;
+             wiggledTexCoord.s += sin(4.0 * 3.141592653589 * wiggledTexCoord.t) * wiggleAmount;
+             gl_FragColor = texture2D(source, wiggledTexCoord.st);
+         }
+         "
+     }
+ }
diff --git a/tests/auto/declarative/qmlshadersplugin/qmlshadersplugin.pro b/tests/auto/declarative/qmlshadersplugin/qmlshadersplugin.pro
new file mode 100644
index 0000000..6225a8f
--- /dev/null
+++ b/tests/auto/declarative/qmlshadersplugin/qmlshadersplugin.pro
@@ -0,0 +1,18 @@
+load(qttest_p4)
+
+QT += opengl declarative
+SOURCES += tst_qmlshadersplugin.cpp
+
+SOURCES += \
+    ../../../../src/imports/shaders/src/shadereffectitem.cpp \
+    ../../../../src/imports/shaders/src/shadereffectsource.cpp \
+    ../../../../src/imports/shaders/src/shadereffect.cpp \
+    ../../../../src/imports/shaders/src/shadereffectbuffer.cpp \
+    ../../../../src/imports/shaders/src/scenegraph/qsggeometry.cpp
+
+HEADERS += \
+    ../../../../src/imports/shaders/src/shadereffectitem.h \
+    ../../../../src/imports/shaders/src/shadereffectsource.h \
+    ../../../../src/imports/shaders/src/shadereffect.h \
+    ../../../../src/imports/shaders/src/shadereffectbuffer.h \
+    ../../../../src/imports/shaders/src/scenegraph/qsggeometry.h
diff --git a/tests/auto/declarative/qmlshadersplugin/tst_qmlshadersplugin.cpp b/tests/auto/declarative/qmlshadersplugin/tst_qmlshadersplugin.cpp
new file mode 100644
index 0000000..61fe2ee
--- /dev/null
+++ b/tests/auto/declarative/qmlshadersplugin/tst_qmlshadersplugin.cpp
@@ -0,0 +1,205 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QML Shaders plugin of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <qtest.h>
+#include <QtDeclarative>
+#include "../../../../src/imports/shaders/src/shadereffectitem.h"
+#include "../../../../src/imports/shaders/src/shadereffectsource.h"
+#include "../../../../src/imports/shaders/src/shadereffect.h"
+
+static const char qt_default_vertex_code[] =
+        "uniform highp mat4 qt_ModelViewProjectionMatrix;\n"
+        "attribute highp vec4 qt_Vertex;\n"
+        "attribute highp vec2 qt_MultiTexCoord0;\n"
+        "varying highp vec2 qt_TexCoord0;\n"
+        "void main(void)\n"
+        "{\n"
+            "qt_TexCoord0 = qt_MultiTexCoord0;\n"
+            "gl_Position = qt_ModelViewProjectionMatrix * qt_Vertex;\n"
+        "}\n";
+
+static const char qt_default_fragment_code[] =
+        "varying highp vec2 qt_TexCoord0;\n"
+        "uniform lowp sampler2D source;\n"
+        "void main(void)\n"
+        "{\n"
+            "gl_FragColor = texture2D(source, qt_TexCoord0.st);\n"
+        "}\n";
+
+class tst_qmlshadersplugin : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void initTestCase();
+    void shaderEffectItemAPI();
+    void shaderEffectSourceAPI();
+    void combined();
+
+private:
+    QDeclarativeEngine engine;
+};
+
+void tst_qmlshadersplugin::initTestCase()
+{
+    const char *uri ="Qt.labs.shaders";
+    qmlRegisterType<ShaderEffectItem>(uri, 1, 0, "ShaderEffectItem");
+    qmlRegisterType<ShaderEffectSource>(uri, 1, 0, "ShaderEffectSource");
+}
+
+
+void tst_qmlshadersplugin::shaderEffectItemAPI()
+{
+    // Creation
+    QString componentStr = "import QtQuick 1.0\n"
+            "import Qt.labs.shaders 1.0\n"
+            "ShaderEffectItem {\n"
+            "property variant source\n"
+            "width: 200; height: 300\n"
+            "}";
+    QDeclarativeComponent component(&engine);
+    component.setData(componentStr.toLatin1(), QUrl::fromLocalFile(""));
+
+    QObject *obj = component.create();
+    QTest::qWait(100);
+    QVERIFY(obj != 0);
+
+    // Default values
+    QCOMPARE(obj->property("width").toDouble(), 200.);
+    QCOMPARE(obj->property("height").toDouble(), 300.);
+    QCOMPARE(obj->property("fragmentShader").toString(), QString(""));
+    QCOMPARE(obj->property("vertexShader").toString(), QString(""));
+    QCOMPARE(obj->property("blending").toBool(), true);
+    QCOMPARE(obj->property("meshResolution").toSize(), QSize(1, 1));
+    QCOMPARE(obj->property("visible").toBool(), true);
+
+    // Seting the values
+    QVERIFY(obj->setProperty("fragmentShader", QString(qt_default_fragment_code)));
+    QVERIFY(obj->setProperty("vertexShader", QString(qt_default_vertex_code)));
+    QVERIFY(obj->setProperty("blending", false));
+    QVERIFY(obj->setProperty("meshResolution", QSize(20, 10)));
+    QVERIFY(obj->setProperty("visible", false));
+
+    QCOMPARE(obj->property("fragmentShader").toString(), QString(qt_default_fragment_code));
+    QCOMPARE(obj->property("vertexShader").toString(), QString(qt_default_vertex_code));
+    QCOMPARE(obj->property("blending").toBool(), false);
+    QCOMPARE(obj->property("meshResolution").toSize(), QSize(20, 10));
+    QCOMPARE(obj->property("visible").toBool(), false);
+
+    delete obj;
+}
+
+void tst_qmlshadersplugin::shaderEffectSourceAPI()
+{
+    // Creation
+    QString componentStr = "import QtQuick 1.0\n"
+            "import Qt.labs.shaders 1.0\n"
+            "ShaderEffectSource {}";
+    QDeclarativeComponent shaderEffectSourceComponent(&engine);
+    shaderEffectSourceComponent.setData(componentStr.toLatin1(), QUrl::fromLocalFile(""));
+
+    QObject *obj = shaderEffectSourceComponent.create();
+    QTest::qWait(100);
+    QVERIFY(obj != 0);
+
+    // Default values
+    QCOMPARE(obj->property("sourceRect").toRect(), QRect(0, 0, 0, 0));
+    QCOMPARE(obj->property("textureSize").toSize(), QSize(0, 0));
+    QCOMPARE(obj->property("live").toBool(), true);
+    QCOMPARE(obj->property("hideSource").toBool(), false);
+    QCOMPARE(obj->property("wrapMode").toUInt(), static_cast<unsigned int>(ShaderEffectSource::ClampToEdge));
+
+    // Seting the values
+    componentStr = "import QtQuick 1.0\n"
+        "Item {}";
+    QDeclarativeComponent itemComponent(&engine);
+    itemComponent.setData(componentStr.toLatin1(), QUrl::fromLocalFile(""));
+    QDeclarativeItem *item = qobject_cast<QDeclarativeItem *> (itemComponent.create());
+    QVERIFY(item != 0);
+
+    QVERIFY(obj->setProperty("sourceItem", QVariant::fromValue(item)));
+    QVERIFY(obj->setProperty("sourceRect", QRect(10, 20, 30, 40)));
+    QVERIFY(obj->setProperty("textureSize", QSize(50, 100)));
+    QVERIFY(obj->setProperty("live", false));
+    QVERIFY(obj->setProperty("hideSource", true));
+    QVERIFY(obj->setProperty("wrapMode", static_cast<unsigned int>(ShaderEffectSource::Repeat)));
+
+    QCOMPARE(obj->property("sourceItem"), QVariant::fromValue(item));
+    QCOMPARE(obj->property("sourceRect").toRect(), QRect(10, 20, 30, 40));
+    QCOMPARE(obj->property("textureSize").toSize(), QSize(50, 100));
+    QCOMPARE(obj->property("live").toBool(), false);
+    QCOMPARE(obj->property("hideSource").toBool(), true);
+    QCOMPARE(obj->property("wrapMode").toUInt(), static_cast<unsigned int>(ShaderEffectSource::Repeat));
+
+    delete item;
+    delete obj;
+}
+
+void tst_qmlshadersplugin::combined()
+{
+    QGLFormat format = QGLFormat::defaultFormat();
+    format.setSampleBuffers(false);
+    format.setSwapInterval(1);
+
+    QGLWidget* glWidget = new QGLWidget(format);
+    glWidget->setAutoFillBackground(false);
+
+    QDeclarativeView view;
+    view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
+    view.setAttribute(Qt::WA_OpaquePaintEvent);
+    view.setAttribute(Qt::WA_NoSystemBackground);
+    view.setViewport(glWidget);
+    view.setSource(QUrl::fromLocalFile("main.qml"));
+    view.show();
+    QTest::qWait(1000);
+
+    QObject *item = view.rootObject()->findChild<QDeclarativeItem*>("effectItem");
+    QVERIFY(item != 0);
+
+    QObject *src = view.rootObject()->findChild<QDeclarativeItem*>("effectSource");
+    QVERIFY(src != 0);
+
+    QCOMPARE(item->property("source"), QVariant::fromValue(src));
+}
+
+QTEST_MAIN(tst_qmlshadersplugin)
+
+#include "tst_qmlshadersplugin.moc"