Move QOpenGLPaintEngine and related classes from QtGui to QtOpenGL

Also moves the openglwindow test to the opengl folder, as it makes use of these
classes.

Task-number: QTBUG-74409
Change-Id: Id9f0013cedcc8bd1e87122c005641d7298525045
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

5 files changed, 0 insertions, 439 deletions

diff --git a/examples/gui/openglwindow/main.cpp b/examples/gui/openglwindow/main.cpp
deleted file mode 100644
index 03a6ece06f..0000000000
--- a/examples/gui/openglwindow/main.cpp
+++ /dev/null
@@ -1,177 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** 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 The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "openglwindow.h"
-
-#include <QGuiApplication>
-#include <QMatrix4x4>
-#include <QOpenGLShaderProgram>
-#include <QScreen>
-#include <QtMath>
-
-
-//! [1]
-class TriangleWindow : public OpenGLWindow
-{
-public:
-    using OpenGLWindow::OpenGLWindow;
-
-    void initialize() override;
-    void render() override;
-
-private:
-    GLint m_posAttr = 0;
-    GLint m_colAttr = 0;
-    GLint m_matrixUniform = 0;
-
-    QOpenGLShaderProgram *m_program = nullptr;
-    int m_frame = 0;
-};
-//! [1]
-
-//! [2]
-int main(int argc, char **argv)
-{
-    QGuiApplication app(argc, argv);
-
-    QSurfaceFormat format;
-    format.setSamples(16);
-
-    TriangleWindow window;
-    window.setFormat(format);
-    window.resize(640, 480);
-    window.show();
-
-    window.setAnimating(true);
-
-    return app.exec();
-}
-//! [2]
-
-
-//! [3]
-static const char *vertexShaderSource =
-    "attribute highp vec4 posAttr;\n"
-    "attribute lowp vec4 colAttr;\n"
-    "varying lowp vec4 col;\n"
-    "uniform highp mat4 matrix;\n"
-    "void main() {\n"
-    "   col = colAttr;\n"
-    "   gl_Position = matrix * posAttr;\n"
-    "}\n";
-
-static const char *fragmentShaderSource =
-    "varying lowp vec4 col;\n"
-    "void main() {\n"
-    "   gl_FragColor = col;\n"
-    "}\n";
-//! [3]
-
-//! [4]
-void TriangleWindow::initialize()
-{
-    m_program = new QOpenGLShaderProgram(this);
-    m_program->addShaderFromSourceCode(QOpenGLShader::Vertex, vertexShaderSource);
-    m_program->addShaderFromSourceCode(QOpenGLShader::Fragment, fragmentShaderSource);
-    m_program->link();
-    m_posAttr = m_program->attributeLocation("posAttr");
-    Q_ASSERT(m_posAttr != -1);
-    m_colAttr = m_program->attributeLocation("colAttr");
-    Q_ASSERT(m_colAttr != -1);
-    m_matrixUniform = m_program->uniformLocation("matrix");
-    Q_ASSERT(m_matrixUniform != -1);
-}
-//! [4]
-
-//! [5]
-void TriangleWindow::render()
-{
-    const qreal retinaScale = devicePixelRatio();
-    glViewport(0, 0, width() * retinaScale, height() * retinaScale);
-
-    glClear(GL_COLOR_BUFFER_BIT);
-
-    m_program->bind();
-
-    QMatrix4x4 matrix;
-    matrix.perspective(60.0f, 4.0f / 3.0f, 0.1f, 100.0f);
-    matrix.translate(0, 0, -2);
-    matrix.rotate(100.0f * m_frame / screen()->refreshRate(), 0, 1, 0);
-
-    m_program->setUniformValue(m_matrixUniform, matrix);
-
-    static const GLfloat vertices[] = {
-         0.0f,  0.707f,
-        -0.5f, -0.5f,
-         0.5f, -0.5f
-    };
-
-    static const GLfloat colors[] = {
-        1.0f, 0.0f, 0.0f,
-        0.0f, 1.0f, 0.0f,
-        0.0f, 0.0f, 1.0f
-    };
-
-    glVertexAttribPointer(m_posAttr, 2, GL_FLOAT, GL_FALSE, 0, vertices);
-    glVertexAttribPointer(m_colAttr, 3, GL_FLOAT, GL_FALSE, 0, colors);
-
-    glEnableVertexAttribArray(m_posAttr);
-    glEnableVertexAttribArray(m_colAttr);
-
-    glDrawArrays(GL_TRIANGLES, 0, 3);
-
-    glDisableVertexAttribArray(m_colAttr);
-    glDisableVertexAttribArray(m_posAttr);
-
-    m_program->release();
-
-    ++m_frame;
-}
-//! [5]
diff --git a/examples/gui/openglwindow/openglwindow.cpp b/examples/gui/openglwindow/openglwindow.cpp
deleted file mode 100644
index bac887dca0..0000000000
--- a/examples/gui/openglwindow/openglwindow.cpp
+++ /dev/null
@@ -1,161 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** 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 The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "openglwindow.h"
-
-#include <QOpenGLContext>
-#include <QOpenGLPaintDevice>
-#include <QPainter>
-
-//! [1]
-OpenGLWindow::OpenGLWindow(QWindow *parent)
-    : QWindow(parent)
-{
-    setSurfaceType(QWindow::OpenGLSurface);
-}
-//! [1]
-
-OpenGLWindow::~OpenGLWindow()
-{
-    delete m_device;
-}
-//! [2]
-void OpenGLWindow::render(QPainter *painter)
-{
-    Q_UNUSED(painter);
-}
-
-void OpenGLWindow::initialize()
-{
-}
-
-void OpenGLWindow::render()
-{
-    if (!m_device)
-        m_device = new QOpenGLPaintDevice;
-
-    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
-
-    m_device->setSize(size() * devicePixelRatio());
-    m_device->setDevicePixelRatio(devicePixelRatio());
-
-    QPainter painter(m_device);
-    render(&painter);
-}
-//! [2]
-
-//! [3]
-void OpenGLWindow::renderLater()
-{
-    requestUpdate();
-}
-
-bool OpenGLWindow::event(QEvent *event)
-{
-    switch (event->type()) {
-    case QEvent::UpdateRequest:
-        renderNow();
-        return true;
-    default:
-        return QWindow::event(event);
-    }
-}
-
-void OpenGLWindow::exposeEvent(QExposeEvent *event)
-{
-    Q_UNUSED(event);
-
-    if (isExposed())
-        renderNow();
-}
-//! [3]
-
-//! [4]
-void OpenGLWindow::renderNow()
-{
-    if (!isExposed())
-        return;
-
-    bool needsInitialize = false;
-
-    if (!m_context) {
-        m_context = new QOpenGLContext(this);
-        m_context->setFormat(requestedFormat());
-        m_context->create();
-
-        needsInitialize = true;
-    }
-
-    m_context->makeCurrent(this);
-
-    if (needsInitialize) {
-        initializeOpenGLFunctions();
-        initialize();
-    }
-
-    render();
-
-    m_context->swapBuffers(this);
-
-    if (m_animating)
-        renderLater();
-}
-//! [4]
-
-//! [5]
-void OpenGLWindow::setAnimating(bool animating)
-{
-    m_animating = animating;
-
-    if (animating)
-        renderLater();
-}
-//! [5]
-
diff --git a/examples/gui/openglwindow/openglwindow.h b/examples/gui/openglwindow/openglwindow.h
deleted file mode 100644
index 8db943ddde..0000000000
--- a/examples/gui/openglwindow/openglwindow.h
+++ /dev/null
@@ -1,91 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** 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 The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <QWindow>
-#include <QOpenGLFunctions>
-
-QT_BEGIN_NAMESPACE
-class QPainter;
-class QOpenGLContext;
-class QOpenGLPaintDevice;
-QT_END_NAMESPACE
-
-//! [1]
-class OpenGLWindow : public QWindow, protected QOpenGLFunctions
-{
-    Q_OBJECT
-public:
-    explicit OpenGLWindow(QWindow *parent = nullptr);
-    ~OpenGLWindow();
-
-    virtual void render(QPainter *painter);
-    virtual void render();
-
-    virtual void initialize();
-
-    void setAnimating(bool animating);
-
-public slots:
-    void renderLater();
-    void renderNow();
-
-protected:
-    bool event(QEvent *event) override;
-
-    void exposeEvent(QExposeEvent *event) override;
-
-private:
-    bool m_animating = false;
-
-    QOpenGLContext *m_context = nullptr;
-    QOpenGLPaintDevice *m_device = nullptr;
-};
-//! [1]
-
diff --git a/examples/gui/openglwindow/openglwindow.pri b/examples/gui/openglwindow/openglwindow.pri
deleted file mode 100644
index 45b0b0cd29..0000000000
--- a/examples/gui/openglwindow/openglwindow.pri
+++ /dev/null
@@ -1,3 +0,0 @@
-INCLUDEPATH += $$PWD
-SOURCES += $$PWD/openglwindow.cpp
-HEADERS += $$PWD/openglwindow.h
diff --git a/examples/gui/openglwindow/openglwindow.pro b/examples/gui/openglwindow/openglwindow.pro
deleted file mode 100644
index 93f18f3d3f..0000000000
--- a/examples/gui/openglwindow/openglwindow.pro
+++ /dev/null
@@ -1,7 +0,0 @@
-include(openglwindow.pri)
-
-SOURCES += \
-    main.cpp
-
-target.path = $$[QT_INSTALL_EXAMPLES]/gui/openglwindow
-INSTALLS += target