EGLFS KMS Hooks: Add HW cursor support
Change-Id: I9cd62f3cbcc4ab844f05c43e775512b72d4ff159 Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>bb10
Louai Al-Khanji
parent
f14470fa00
commit
fabef06f33
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@ -43,7 +43,12 @@
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#include <QtPlatformSupport/private/qdevicediscovery_p.h>
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#include <QtCore/private/qcore_unix_p.h>
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#include <QtCore/QScopedPointer>
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#include <QtCore/QJsonDocument>
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#include <QtCore/QJsonObject>
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#include <QtCore/QJsonArray>
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#include <QtGui/qpa/qplatformwindow.h>
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#include <QtGui/qpa/qplatformcursor.h>
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#include <QtGui/QPainter>
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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@ -51,6 +56,43 @@
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QT_USE_NAMESPACE
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class QKmsCursor : public QPlatformCursor
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{
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Q_OBJECT
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public:
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QKmsCursor(gbm_device *gbm_device, int dri_fd, uint32_t crtcId);
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~QKmsCursor();
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// input methods
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void pointerEvent(const QMouseEvent & event) Q_DECL_OVERRIDE;
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#ifndef QT_NO_CURSOR
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void changeCursor(QCursor * windowCursor, QWindow * window) Q_DECL_OVERRIDE;
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#endif
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QPoint pos() const Q_DECL_OVERRIDE;
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void setPos(const QPoint &pos) Q_DECL_OVERRIDE;
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private:
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void initCursorAtlas();
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gbm_device *m_gbm_device;
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int m_dri_fd;
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uint32_t m_crtc;
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gbm_bo *m_bo;
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QPoint m_pos;
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QPlatformCursorImage m_cursorImage;
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bool m_visible;
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// cursor atlas information
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struct CursorAtlas {
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CursorAtlas() : cursorsPerRow(0), cursorWidth(0), cursorHeight(0) { }
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int cursorsPerRow;
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int width, height; // width and height of the atlas
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int cursorWidth, cursorHeight; // width and height of cursors inside the atlas
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QList<QPoint> hotSpots;
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QImage image;
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} m_cursorAtlas;
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};
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class QEglKmsHooks : public QEglFSHooks
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{
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public:
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@ -68,6 +110,7 @@ public:
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const QSurfaceFormat &format) Q_DECL_OVERRIDE;
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void destroyNativeWindow(EGLNativeWindowType window) Q_DECL_OVERRIDE;
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bool hasCapability(QPlatformIntegration::Capability cap) const Q_DECL_OVERRIDE;
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QPlatformCursor *createCursor(QPlatformScreen *screen) const Q_DECL_OVERRIDE;
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void presentBuffer() Q_DECL_OVERRIDE;
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bool setup_kms();
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@ -221,6 +264,12 @@ bool QEglKmsHooks::hasCapability(QPlatformIntegration::Capability cap) const
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}
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}
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QPlatformCursor *QEglKmsHooks::createCursor(QPlatformScreen *screen) const
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{
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Q_UNUSED(screen);
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return new QKmsCursor(m_gbm_device, m_dri_fd, m_drm_crtc);
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}
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static void gbm_bo_destroyed_callback(gbm_bo *bo, void *data)
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{
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QEglKmsHooks::FrameBuffer *fb = static_cast<QEglKmsHooks::FrameBuffer *>(data);
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@ -414,3 +463,143 @@ bool QEglKmsHooks::setup_kms()
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return true;
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}
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QKmsCursor::QKmsCursor(gbm_device *gbm_device, int dri_fd, uint32_t crtcId)
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: m_gbm_device(gbm_device)
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, m_dri_fd(dri_fd)
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, m_crtc(crtcId)
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, m_bo(gbm_bo_create(gbm_device, 64, 64, GBM_FORMAT_ARGB8888,
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GBM_BO_USE_CURSOR_64X64 | GBM_BO_USE_WRITE))
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, m_cursorImage(0, 0, 0, 0, 0, 0)
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, m_visible(true)
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{
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if (!m_bo) {
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qWarning("Could not create buffer for cursor!");
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} else {
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initCursorAtlas();
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}
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drmModeMoveCursor(m_dri_fd, m_crtc, 0, 0);
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}
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QKmsCursor::~QKmsCursor()
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{
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drmModeSetCursor(m_dri_fd, m_crtc, 0, 0, 0);
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drmModeMoveCursor(m_dri_fd, m_crtc, 0, 0);
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gbm_bo_destroy(m_bo);
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m_bo = Q_NULLPTR;
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}
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void QKmsCursor::pointerEvent(const QMouseEvent &event)
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{
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setPos(event.screenPos().toPoint());
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}
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#ifndef QT_NO_CURSOR
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void QKmsCursor::changeCursor(QCursor *windowCursor, QWindow *window)
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{
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Q_UNUSED(window);
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if (!m_visible)
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return;
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const Qt::CursorShape newShape = windowCursor ? windowCursor->shape() : Qt::ArrowCursor;
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if (newShape == Qt::BitmapCursor) {
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m_cursorImage.set(windowCursor->pixmap().toImage(),
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windowCursor->hotSpot().x(),
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windowCursor->hotSpot().y());
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} else {
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// Standard cursor, look up in atlas
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const int width = m_cursorAtlas.cursorWidth;
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const int height = m_cursorAtlas.cursorHeight;
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const qreal ws = (qreal)m_cursorAtlas.cursorWidth / m_cursorAtlas.width;
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const qreal hs = (qreal)m_cursorAtlas.cursorHeight / m_cursorAtlas.height;
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QRect textureRect(ws * (newShape % m_cursorAtlas.cursorsPerRow) * m_cursorAtlas.width,
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hs * (newShape / m_cursorAtlas.cursorsPerRow) * m_cursorAtlas.height,
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width,
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height);
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QPoint hotSpot = m_cursorAtlas.hotSpots[newShape];
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m_cursorImage.set(m_cursorAtlas.image.copy(textureRect),
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hotSpot.x(),
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hotSpot.y());
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}
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if (m_cursorImage.image()->width() > 64 || m_cursorImage.image()->height() > 64)
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qWarning("Cursor larger than 64x64, cursor will be clipped.");
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QImage cursorImage(64, 64, QImage::Format_ARGB32);
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cursorImage.fill(Qt::transparent);
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QPainter painter;
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painter.begin(&cursorImage);
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painter.drawImage(0, 0, *m_cursorImage.image());
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painter.end();
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gbm_bo_write(m_bo, cursorImage.constBits(), cursorImage.byteCount());
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uint32_t handle = gbm_bo_get_handle(m_bo).u32;
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QPoint hot = m_cursorImage.hotspot();
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int status = drmModeSetCursor2(m_dri_fd, m_crtc, handle, 64, 64, hot.x(), hot.y());
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if (status != 0)
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qWarning("Could not set cursor: %d", status);
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}
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#endif // QT_NO_CURSOR
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QPoint QKmsCursor::pos() const
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{
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return m_pos;
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}
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void QKmsCursor::setPos(const QPoint &pos)
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{
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QPoint adjustedPos = pos - m_cursorImage.hotspot();
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int ret = drmModeMoveCursor(m_dri_fd, m_crtc, adjustedPos.x(), adjustedPos.y());
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if (ret == 0) {
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m_pos = pos;
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} else {
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qWarning("Failed to move cursor: %d", ret);
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}
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}
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void QKmsCursor::initCursorAtlas()
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{
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static QByteArray json = qgetenv("QT_QPA_EGLFS_CURSOR");
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if (json.isEmpty())
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json = ":/cursor.json";
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QFile file(QString::fromUtf8(json));
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if (!file.open(QFile::ReadOnly)) {
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drmModeSetCursor(m_dri_fd, m_crtc, 0, 0, 0);
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drmModeMoveCursor(m_dri_fd, m_crtc, 0, 0);
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m_visible = false;
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return;
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}
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QJsonDocument doc = QJsonDocument::fromJson(file.readAll());
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QJsonObject object = doc.object();
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QString atlas = object.value(QLatin1String("image")).toString();
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Q_ASSERT(!atlas.isEmpty());
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const int cursorsPerRow = object.value(QLatin1String("cursorsPerRow")).toDouble();
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Q_ASSERT(cursorsPerRow);
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m_cursorAtlas.cursorsPerRow = cursorsPerRow;
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const QJsonArray hotSpots = object.value(QLatin1String("hotSpots")).toArray();
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Q_ASSERT(hotSpots.count() == Qt::LastCursor + 1);
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for (int i = 0; i < hotSpots.count(); i++) {
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QPoint hotSpot(hotSpots[i].toArray()[0].toDouble(), hotSpots[i].toArray()[1].toDouble());
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m_cursorAtlas.hotSpots << hotSpot;
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}
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QImage image = QImage(atlas).convertToFormat(QImage::Format_ARGB32);
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m_cursorAtlas.cursorWidth = image.width() / m_cursorAtlas.cursorsPerRow;
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m_cursorAtlas.cursorHeight = image.height() / ((Qt::LastCursor + cursorsPerRow) / cursorsPerRow);
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m_cursorAtlas.width = image.width();
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m_cursorAtlas.height = image.height();
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m_cursorAtlas.image = image;
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}
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#include "qeglfshooks_kms.moc"
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