Move eglfs-only parts back from eglconvenience

The integration, screen, window and cursor classes were split in Qt 5.3 under a plan
of sharing these between eglfs, the Android port and potentially other future plugins.
This never materialized.

Maintaining the artificial split is getting difficult and is prone to errors. Therefore
it is time to merge back these base classes into eglfs. The result is cleaner, smaller,
and potentially better performing code. eglconvenience is now restored to be a collection
of convenience classes instead of platform plugin bits.

Change-Id: I75c6ad876ef66a1a0c5b39c1c307f928d2ed47d4
Reviewed-by: Louai Al-Khanji <louai.al-khanji@theqtcompany.com>

1 files changed, 143 insertions, 0 deletions

diff --git a/src/plugins/platforms/eglfs/qeglfscursor.h b/src/plugins/platforms/eglfs/qeglfscursor.h
new file mode 100644
index 0000000000..048f276137
--- /dev/null
+++ b/src/plugins/platforms/eglfs/qeglfscursor.h
@@ -0,0 +1,143 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QEGLFSCURSOR_H
+#define QEGLFSCURSOR_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qeglfsglobal.h"
+#include <qpa/qplatformcursor.h>
+#include <qpa/qplatformscreen.h>
+#include <QtGui/QOpenGLFunctions>
+#include <QtGui/private/qinputdevicemanager_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLShaderProgram;
+class QEglFSCursor;
+class QEglFSScreen;
+
+class QEglFSCursorDeviceListener : public QObject
+{
+    Q_OBJECT
+
+public:
+    QEglFSCursorDeviceListener(QEglFSCursor *cursor) : m_cursor(cursor) { }
+    bool hasMouse() const;
+
+public slots:
+    void onDeviceListChanged(QInputDeviceManager::DeviceType type);
+
+private:
+    QEglFSCursor *m_cursor;
+};
+
+class Q_EGLFS_EXPORT QEglFSCursor : public QPlatformCursor, protected QOpenGLFunctions
+{
+    Q_OBJECT
+public:
+    QEglFSCursor(QPlatformScreen *screen);
+    ~QEglFSCursor();
+
+#ifndef QT_NO_CURSOR
+    void changeCursor(QCursor *cursor, QWindow *widget) Q_DECL_OVERRIDE;
+#endif
+    void pointerEvent(const QMouseEvent &event) Q_DECL_OVERRIDE;
+    QPoint pos() const Q_DECL_OVERRIDE;
+    void setPos(const QPoint &pos) Q_DECL_OVERRIDE;
+
+    QRect cursorRect() const;
+    void paintOnScreen();
+    void resetResources();
+
+    void updateMouseStatus();
+
+private:
+    bool event(QEvent *e) Q_DECL_OVERRIDE;
+#ifndef QT_NO_CURSOR
+    bool setCurrentCursor(QCursor *cursor);
+#endif
+    void draw(const QRectF &rect);
+    void update(const QRegion &region);
+    void createShaderPrograms();
+    void createCursorTexture(uint *texture, const QImage &image);
+    void initCursorAtlas();
+
+    // current cursor information
+    struct Cursor {
+        Cursor() : texture(0), shape(Qt::BlankCursor), customCursorTexture(0), customCursorPending(false) { }
+        uint texture; // a texture from 'image' or the atlas
+        Qt::CursorShape shape;
+        QRectF textureRect; // normalized rect inside texture
+        QSize size; // size of the cursor
+        QPoint hotSpot;
+        QImage customCursorImage;
+        QPoint pos; // current cursor position
+        uint customCursorTexture;
+        bool customCursorPending;
+    } m_cursor;
+
+    // cursor atlas information
+    struct CursorAtlas {
+        CursorAtlas() : cursorsPerRow(0), texture(0), cursorWidth(0), cursorHeight(0) { }
+        int cursorsPerRow;
+        uint texture;
+        int width, height; // width and height of the atlas
+        int cursorWidth, cursorHeight; // width and height of cursors inside the atlas
+        QList<QPoint> hotSpots;
+        QImage image; // valid until it's uploaded
+    } m_cursorAtlas;
+
+    bool m_visible;
+    QEglFSScreen *m_screen;
+    QOpenGLShaderProgram *m_program;
+    int m_vertexCoordEntry;
+    int m_textureCoordEntry;
+    int m_textureEntry;
+    QEglFSCursorDeviceListener *m_deviceListener;
+    bool m_updateRequested;
+};
+
+QT_END_NAMESPACE
+
+#endif // QEGLFSCURSOR_H