1 files changed, 218 insertions, 0 deletions
diff --git a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmscursor.cpp b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmscursor.cpp
new file mode 100644
index 0000000000..e337e832e2
--- /dev/null
+++ b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmscursor.cpp
@@ -0,0 +1,218 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qeglfskmscursor.h"
+#include "qeglfskmsscreen.h"
+#include "qeglfskmsdevice.h"
+
+#include <QtCore/QJsonDocument>
+#include <QtCore/QJsonObject>
+#include <QtCore/QJsonArray>
+#include <QtCore/QLoggingCategory>
+#include <QtGui/QPainter>
+
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+#ifndef DRM_CAP_CURSOR_WIDTH
+#define DRM_CAP_CURSOR_WIDTH 0x8
+#endif
+
+#ifndef DRM_CAP_CURSOR_HEIGHT
+#define DRM_CAP_CURSOR_HEIGHT 0x9
+#endif
+
+QT_BEGIN_NAMESPACE
+
+Q_DECLARE_LOGGING_CATEGORY(qLcEglfsKmsDebug)
+
+QEglFSKmsCursor::QEglFSKmsCursor(QEglFSKmsScreen *screen)
+    : m_screen(screen)
+    , m_cursorSize(64, 64) // 64x64 is the old standard size, we now try to query the real size below
+    , m_bo(Q_NULLPTR)
+    , m_cursorImage(0, 0, 0, 0, 0, 0)
+    , m_visible(true)
+{
+    uint64_t width, height;
+    if ((drmGetCap(m_screen->device()->fd(), DRM_CAP_CURSOR_WIDTH, &width) == 0)
+        && (drmGetCap(m_screen->device()->fd(), DRM_CAP_CURSOR_HEIGHT, &height) == 0)) {
+        m_cursorSize.setWidth(width);
+        m_cursorSize.setHeight(height);
+    }
+
+    m_bo = gbm_bo_create(m_screen->device()->device(), m_cursorSize.width(), m_cursorSize.height(),
+                         GBM_FORMAT_ARGB8888, GBM_BO_USE_CURSOR_64X64 | GBM_BO_USE_WRITE);
+    if (!m_bo) {
+        qWarning("Could not create buffer for cursor!");
+    } else {
+        initCursorAtlas();
+    }
+
+#ifndef QT_NO_CURSOR
+    QCursor cursor(Qt::ArrowCursor);
+    changeCursor(&cursor, 0);
+#endif
+    setPos(QPoint(0, 0));
+}
+
+QEglFSKmsCursor::~QEglFSKmsCursor()
+{
+    drmModeSetCursor(m_screen->device()->fd(), m_screen->output().crtc_id, 0, 0, 0);
+    drmModeMoveCursor(m_screen->device()->fd(), m_screen->output().crtc_id, 0, 0);
+
+    gbm_bo_destroy(m_bo);
+    m_bo = Q_NULLPTR;
+}
+
+void QEglFSKmsCursor::pointerEvent(const QMouseEvent &event)
+{
+    setPos(event.screenPos().toPoint());
+}
+
+#ifndef QT_NO_CURSOR
+void QEglFSKmsCursor::changeCursor(QCursor *windowCursor, QWindow *window)
+{
+    Q_UNUSED(window);
+
+    if (!m_visible)
+        return;
+
+    const Qt::CursorShape newShape = windowCursor ? windowCursor->shape() : Qt::ArrowCursor;
+    if (newShape == Qt::BitmapCursor) {
+        m_cursorImage.set(windowCursor->pixmap().toImage(),
+                          windowCursor->hotSpot().x(),
+                          windowCursor->hotSpot().y());
+    } else {
+        // Standard cursor, look up in atlas
+        const int width = m_cursorAtlas.cursorWidth;
+        const int height = m_cursorAtlas.cursorHeight;
+        const qreal ws = (qreal)m_cursorAtlas.cursorWidth / m_cursorAtlas.width;
+        const qreal hs = (qreal)m_cursorAtlas.cursorHeight / m_cursorAtlas.height;
+
+        QRect textureRect(ws * (newShape % m_cursorAtlas.cursorsPerRow) * m_cursorAtlas.width,
+                          hs * (newShape / m_cursorAtlas.cursorsPerRow) * m_cursorAtlas.height,
+                          width,
+                          height);
+        QPoint hotSpot = m_cursorAtlas.hotSpots[newShape];
+        m_cursorImage.set(m_cursorAtlas.image.copy(textureRect),
+                          hotSpot.x(),
+                          hotSpot.y());
+    }
+
+    if (m_cursorImage.image()->width() > m_cursorSize.width() || m_cursorImage.image()->height() > m_cursorSize.height())
+        qWarning("Cursor larger than %dx%d, cursor will be clipped.", m_cursorSize.width(), m_cursorSize.height());
+
+    QImage cursorImage(m_cursorSize, QImage::Format_ARGB32);
+    cursorImage.fill(Qt::transparent);
+
+    QPainter painter;
+    painter.begin(&cursorImage);
+    painter.drawImage(0, 0, *m_cursorImage.image());
+    painter.end();
+
+    gbm_bo_write(m_bo, cursorImage.constBits(), cursorImage.byteCount());
+
+    uint32_t handle = gbm_bo_get_handle(m_bo).u32;
+    int status = drmModeSetCursor(m_screen->device()->fd(), m_screen->output().crtc_id, handle,
+                                  m_cursorSize.width(), m_cursorSize.height());
+    if (status != 0)
+        qWarning("Could not set cursor: %d", status);
+}
+#endif // QT_NO_CURSOR
+
+QPoint QEglFSKmsCursor::pos() const
+{
+    return m_pos;
+}
+
+void QEglFSKmsCursor::setPos(const QPoint &pos)
+{
+    QPoint adjustedPos = pos - m_cursorImage.hotspot();
+    int ret = drmModeMoveCursor(m_screen->device()->fd(), m_screen->output().crtc_id, adjustedPos.x(), adjustedPos.y());
+    if (ret == 0) {
+        m_pos = pos;
+    } else {
+        qWarning("Failed to move cursor: %d", ret);
+    }
+}
+
+void QEglFSKmsCursor::initCursorAtlas()
+{
+    static QByteArray json = qgetenv("QT_QPA_EGLFS_CURSOR");
+    if (json.isEmpty())
+        json = ":/cursor.json";
+
+    qCDebug(qLcEglfsKmsDebug) << "Initializing cursor atlas from" << json;
+
+    QFile file(QString::fromUtf8(json));
+    if (!file.open(QFile::ReadOnly)) {
+        drmModeSetCursor(m_screen->device()->fd(), m_screen->output().crtc_id, 0, 0, 0);
+        drmModeMoveCursor(m_screen->device()->fd(), m_screen->output().crtc_id, 0, 0);
+        m_visible = false;
+        return;
+    }
+
+    QJsonDocument doc = QJsonDocument::fromJson(file.readAll());
+    QJsonObject object = doc.object();
+
+    QString atlas = object.value(QLatin1String("image")).toString();
+    Q_ASSERT(!atlas.isEmpty());
+
+    const int cursorsPerRow = object.value(QLatin1String("cursorsPerRow")).toDouble();
+    Q_ASSERT(cursorsPerRow);
+    m_cursorAtlas.cursorsPerRow = cursorsPerRow;
+
+    const QJsonArray hotSpots = object.value(QLatin1String("hotSpots")).toArray();
+    Q_ASSERT(hotSpots.count() == Qt::LastCursor + 1);
+    for (int i = 0; i < hotSpots.count(); i++) {
+        QPoint hotSpot(hotSpots[i].toArray()[0].toDouble(), hotSpots[i].toArray()[1].toDouble());
+        m_cursorAtlas.hotSpots << hotSpot;
+    }
+
+    QImage image = QImage(atlas).convertToFormat(QImage::Format_ARGB32);
+    m_cursorAtlas.cursorWidth = image.width() / m_cursorAtlas.cursorsPerRow;
+    m_cursorAtlas.cursorHeight = image.height() / ((Qt::LastCursor + cursorsPerRow) / cursorsPerRow);
+    m_cursorAtlas.width = image.width();
+    m_cursorAtlas.height = image.height();
+    m_cursorAtlas.image = image;
+}
+
+QT_END_NAMESPACE