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//#include <QDebug>
#include "qkmscursor.h"
#include "qkmsscreen.h"
#include "qkmsdevice.h"

QT_BEGIN_NAMESPACE

QKmsCursor::QKmsCursor(QKmsScreen *screen)
    : m_screen(screen),
      m_graphicsBufferManager(screen->device()->gbmDevice()),
      m_cursorBufferObject(gbm_bo_create(m_graphicsBufferManager, 64, 64, GBM_FORMAT_ARGB8888,
                                         GBM_BO_USE_CURSOR_64X64|GBM_BO_USE_WRITE)),
      m_cursorImage(new QPlatformCursorImage(0, 0, 0, 0, 0, 0)),
      m_moved(false)
{
}

QKmsCursor::~QKmsCursor()
{
    drmModeSetCursor(m_screen->device()->fd(), m_screen->crtcId(), 0, 0, 0);
    gbm_bo_destroy(m_cursorBufferObject);
}

void QKmsCursor::pointerEvent(const QMouseEvent &event)
{
    m_moved = true;
    int status = drmModeMoveCursor(m_screen->device()->fd(),
                                   m_screen->crtcId(),
                                   event.globalX(),
                                   event.globalY());
    if (status) {
        qWarning("failed to move cursor: %d", status);
    }
}

void QKmsCursor::changeCursor(QCursor *windowCursor, QWindow *window)
{
    Q_UNUSED(window)

    if (!m_moved)
        drmModeMoveCursor(m_screen->device()->fd(), m_screen->crtcId(), 0, 0);

    const Qt::CursorShape newShape = windowCursor ? windowCursor->shape() : Qt::ArrowCursor;
    if (newShape != Qt::BitmapCursor) {
        m_cursorImage->set(newShape);
    } else {
        m_cursorImage->set(windowCursor->pixmap().toImage(),
                           windowCursor->hotSpot().x(),
                           windowCursor->hotSpot().y());
    }

    if ((m_cursorImage->image()->width() > 64) || (m_cursorImage->image()->width() > 64))
        qWarning("Warning: cursor larger than 64x64; only 64x64 pixels will be shown.");

    QImage cursorImage = m_cursorImage->image()->
            convertToFormat(QImage::Format_ARGB32).copy(0, 0, 64, 64);
    gbm_bo_write(m_cursorBufferObject, cursorImage.constBits(), cursorImage.byteCount());

    quint32 handle = gbm_bo_get_handle(m_cursorBufferObject).u32;
    int status = drmModeSetCursor(m_screen->device()->fd(),
                                  m_screen->crtcId(), handle, 64, 64);

    if (status) {
        qWarning("failed to set cursor: %d", status);
    }
}

QT_END_NAMESPACE