Three scene graph examples with docs.

How to make a custom QSGGeometry, how to use QSGSimpleMaterial and how
to use render with raw GL.

Change-Id: I3e5a32b6ae12d7d781c11050ed26a54845e92cca
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>

6 files changed, 0 insertions, 347 deletions

diff --git a/examples/quick/customitems/customitems.pro b/examples/quick/customitems/customitems.pro
index 2349fce1e0..68a240cb5c 100644
--- a/examples/quick/customitems/customitems.pro
+++ b/examples/quick/customitems/customitems.pro
@@ -2,7 +2,6 @@ TEMPLATE = subdirs
 SUBDIRS = \
     #dialcontrol \
     #flipable \
-    glitem \
     painteditem \
     #progressbar \
     #scrollbar \
diff --git a/examples/quick/customitems/glitem/glitem.pro b/examples/quick/customitems/glitem/glitem.pro
deleted file mode 100644
index 64a58b3729..0000000000
--- a/examples/quick/customitems/glitem/glitem.pro
+++ /dev/null
@@ -1,6 +0,0 @@
-QT += qml quick
-
-HEADERS += squircle.h
-SOURCES += squircle.cpp main.cpp
-
-OTHER_FILES += main.qml
diff --git a/examples/quick/customitems/glitem/main.cpp b/examples/quick/customitems/glitem/main.cpp
deleted file mode 100644
index 8d1a91bdb2..0000000000
--- a/examples/quick/customitems/glitem/main.cpp
+++ /dev/null
@@ -1,60 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** GNU Lesser General Public License Usage
-** 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.
-**
-** 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.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <QGuiApplication>
-
-#include <QtQuick/QQuickView>
-
-#include "squircle.h"
-
-int main(int argc, char **argv)
-{
-    QGuiApplication app(argc, argv);
-
-    qmlRegisterType<Squircle>("OpenGLUnderQML", 2, 0, "Squircle");
-
-    QQuickView view;
-    view.setSource(QUrl("main.qml"));
-    view.show();
-
-    return app.exec();
-
-}
diff --git a/examples/quick/customitems/glitem/main.qml b/examples/quick/customitems/glitem/main.qml
deleted file mode 100644
index 66bc08bf03..0000000000
--- a/examples/quick/customitems/glitem/main.qml
+++ /dev/null
@@ -1,81 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** GNU Lesser General Public License Usage
-** 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.
-**
-** 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.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-import QtQuick 2.0
-import OpenGLUnderQML 2.0
-
-Item {
-
-    width: 320
-    height: 480
-
-    Squircle {
-        width: 320
-        height: 320
-        SequentialAnimation on t {
-            NumberAnimation { to: 1; duration: 2500; easing.type: Easing.InQuad }
-            NumberAnimation { to: 0; duration: 2500; easing.type: Easing.OutQuad }
-            loops: Animation.Infinite
-            running: true
-        }
-    }
-
-    Rectangle {
-        color: Qt.rgba(1, 1, 1, 0.8);
-        radius: 10
-        border.width: 1
-        border.color: "white"
-        anchors.fill: label
-        anchors.margins: -10
-    }
-
-    Text {
-        id: label
-        color: "black"
-        wrapMode: Text.WordWrap
-        text: "The background here is a squircle rendered with raw OpenGL using the 'beforeRender()' signal in QQuickWindow. This text label and its border is rendered using QML"
-        anchors.right: parent.right
-        anchors.left: parent.left
-        anchors.bottom: parent.bottom
-        anchors.margins: 20
-    }
-
-}
diff --git a/examples/quick/customitems/glitem/squircle.cpp b/examples/quick/customitems/glitem/squircle.cpp
deleted file mode 100644
index b1340687f9..0000000000
--- a/examples/quick/customitems/glitem/squircle.cpp
+++ /dev/null
@@ -1,123 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** GNU Lesser General Public License Usage
-** 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.
-**
-** 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.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "squircle.h"
-
-#include <QtQuick/qquickwindow.h>
-#include <QOpenGLShaderProgram>
-
-Squircle::Squircle()
-    : m_program(0)
-{
-    setFlag(ItemHasContents);
-}
-
-void Squircle::itemChange(ItemChange change, const ItemChangeData &)
-{
-    // The ItemSceneChange event is sent when we are first attached to a window.
-    if (change == ItemSceneChange) {
-        QQuickWindow *c = window();
-
-        // Connect our the beforeRendering signal to our paint function.
-        // Since this call is executed on the rendering thread it must be
-        // a Qt::DirectConnection
-        connect(c, SIGNAL(beforeRendering()), this, SLOT(paint()), Qt::DirectConnection);
-
-        // If we allow QML to do the clearing, they would clear what we paint
-        // and nothing would show.
-        c->setClearBeforeRendering(false);
-    }
-}
-
-void Squircle::paint()
-{
-    if (!m_program) {
-        m_program = new QOpenGLShaderProgram();
-        m_program->addShaderFromSourceCode(QOpenGLShader::Vertex,
-                                           "attribute highp vec4 vertices;"
-                                           "varying highp vec2 coords;"
-                                           "void main() {"
-                                           "    gl_Position = vertices;"
-                                           "    coords = vertices.xy;"
-                                           "}");
-        m_program->addShaderFromSourceCode(QOpenGLShader::Fragment,
-                                           "uniform lowp float t;"
-                                           "varying highp vec2 coords;"
-                                           "void main() {"
-                                           "    lowp float i = 1. - (pow(coords.x, 4.) + pow(coords.y, 4.));"
-                                           "    i = smoothstep(t - 0.3, t + 0.3, i);"
-                                           "    gl_FragColor = vec4(coords / 2. + .5, i, i);"
-                                           "}");
-
-        m_program->bindAttributeLocation("vertices", 0);
-        m_program->link();
-    }
-
-    m_program->bind();
-
-    m_program->enableAttributeArray(0);
-
-    float values[] = {
-        -1, -1,
-        1, -1,
-        -1, 1,
-        1, 1
-    };
-    m_program->setAttributeArray(0, GL_FLOAT, values, 2);
-    m_program->setUniformValue("t", (float) m_t);
-
-    glViewport(0, 0, window()->width(), window()->height());
-
-    glDisable(GL_DEPTH_TEST);
-
-    glClearColor(0, 0, 0, 1);
-    glClear(GL_COLOR_BUFFER_BIT);
-
-    glEnable(GL_BLEND);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE);
-
-    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
-
-    m_program->disableAttributeArray(0);
-    m_program->release();
-}
-
-
diff --git a/examples/quick/customitems/glitem/squircle.h b/examples/quick/customitems/glitem/squircle.h
deleted file mode 100644
index 9e7a03b75b..0000000000
--- a/examples/quick/customitems/glitem/squircle.h
+++ /dev/null
@@ -1,76 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** GNU Lesser General Public License Usage
-** 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.
-**
-** 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.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef SQUIRCLE_H
-#define SQUIRCLE_H
-
-#include <QtQuick/QQuickItem>
-#include <QtGui/QOpenGLShaderProgram>
-
-class Squircle : public QQuickItem
-{
-    Q_OBJECT
-
-    Q_PROPERTY(qreal t READ t WRITE setT NOTIFY tChanged)
-
-public:
-    Squircle();
-
-    qreal t() const { return m_t; }
-    void setT(qreal t) { m_t = t; emit tChanged(); update(); }
-
-    void itemChange(ItemChange change, const ItemChangeData &);
-
-signals:
-    void tChanged();
-
-public slots:
-    void paint();
-
-private:
-    QOpenGLShaderProgram *m_program;
-
-    qreal m_t;
-    bool m_render_under;
-    bool m_render_over;
-};
-
-#endif // SQUIRCLE_H