Remove QSGEngine and move QSGAbstractRenderer back to private

QSGEngine goes away. Same for the associated example, which is the only
place this is used anywhere in Qt.

As a consequence, the renderer base class can be moved back to private:
there is no use for it to be public anymore, since that made sense only
in combination with QSGEngine. With the RHI-based rendering path driving
a renderer directly is more complicated than before so it is not
reasonable to allow the QSGEngine-style access anymore.

Instead, one has QQuickRenderControl, which allows redirecting and
manually driving the rendering of a QQuickWindow, thus providing an
alternative to the legacy QSGEngine approach.

Task-number: QTBUG-78596
Change-Id: If57c6b657b2053da1c4e545e517026382a71d998
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 0 insertions, 116 deletions

diff --git a/src/quick/scenegraph/coreapi/qsgabstractrenderer.h b/src/quick/scenegraph/coreapi/qsgabstractrenderer.h
deleted file mode 100644
index 1594352dab..0000000000
--- a/src/quick/scenegraph/coreapi/qsgabstractrenderer.h
+++ /dev/null
@@ -1,116 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the QtQuick module 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 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.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QSGABSTRACTRENDERER_H
-#define QSGABSTRACTRENDERER_H
-
-#include <QtQuick/qsgnode.h>
-
-#ifndef GLuint
-#define GLuint uint
-#endif
-
-QT_BEGIN_NAMESPACE
-
-class QSGAbstractRendererPrivate;
-
-class Q_QUICK_EXPORT QSGAbstractRenderer : public QObject
-{
-    Q_OBJECT
-public:
-    enum ClearModeBit
-    {
-        ClearColorBuffer    = 0x0001,
-        ClearDepthBuffer    = 0x0002,
-        ClearStencilBuffer  = 0x0004
-    };
-    Q_DECLARE_FLAGS(ClearMode, ClearModeBit)
-    Q_FLAG(ClearMode)
-
-    enum MatrixTransformFlag
-    {
-        MatrixTransformFlipY = 0x01
-    };
-    Q_DECLARE_FLAGS(MatrixTransformFlags, MatrixTransformFlag)
-    Q_FLAG(MatrixTransformFlags)
-
-    ~QSGAbstractRenderer() override;
-
-    void setRootNode(QSGRootNode *node);
-    QSGRootNode *rootNode() const;
-    void setDeviceRect(const QRect &rect);
-    inline void setDeviceRect(const QSize &size) { setDeviceRect(QRect(QPoint(), size)); }
-    QRect deviceRect() const;
-
-    void setViewportRect(const QRect &rect);
-    inline void setViewportRect(const QSize &size) { setViewportRect(QRect(QPoint(), size)); }
-    QRect viewportRect() const;
-
-    void setProjectionMatrixToRect(const QRectF &rect);
-    void setProjectionMatrixToRect(const QRectF &rect, MatrixTransformFlags flags);
-    void setProjectionMatrix(const QMatrix4x4 &matrix);
-    void setProjectionMatrixWithNativeNDC(const QMatrix4x4 &matrix);
-    QMatrix4x4 projectionMatrix() const;
-    QMatrix4x4 projectionMatrixWithNativeNDC() const;
-
-    void setClearColor(const QColor &color);
-    QColor clearColor() const;
-
-    void setClearMode(ClearMode mode);
-    ClearMode clearMode() const;
-
-    virtual void renderScene(GLuint fboId = 0) = 0;
-
-Q_SIGNALS:
-    void sceneGraphChanged();
-
-protected:
-    explicit QSGAbstractRenderer(QObject *parent = nullptr);
-    virtual void nodeChanged(QSGNode *node, QSGNode::DirtyState state) = 0;
-
-private:
-    Q_DECLARE_PRIVATE(QSGAbstractRenderer)
-    friend class QSGRootNode;
-};
-
-Q_DECLARE_OPERATORS_FOR_FLAGS(QSGAbstractRenderer::ClearMode)
-
-QT_END_NAMESPACE
-
-#endif