kwin/src/plugins/platforms/drm/drm_object_plane.cpp

/*
    KWin - the KDE window manager
    This file is part of the KDE project.

    SPDX-FileCopyrightText: 2016 Roman Gilg <subdiff@gmail.com>

    SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "drm_object_plane.h"
#include "drm_buffer.h"
#include "drm_pointer.h"
#include "logging.h"

namespace KWin
{

DrmPlane::DrmPlane(uint32_t plane_id, int fd)
    : DrmObject(plane_id, fd)
{
}

bool DrmPlane::init()
{
    qCDebug(KWIN_DRM) << "Atomic init for plane:" << m_id;
    DrmScopedPointer<drmModePlane> p(drmModeGetPlane(fd(), m_id));

    if (!p) {
        qCWarning(KWIN_DRM) << "Failed to get kernel plane" << m_id;
        return false;
    }

    m_possibleCrtcs = p->possible_crtcs;

    int count_formats = p->count_formats;
    m_formats.resize(count_formats);
    for (int i = 0; i < count_formats; i++) {
        m_formats[i] = p->formats[i];
    }

    bool success = initProps({
        PropertyDefinition(QByteArrayLiteral("type"), {
            QByteArrayLiteral("Overlay"),
            QByteArrayLiteral("Primary"),
            QByteArrayLiteral("Cursor")}),
        PropertyDefinition(QByteArrayLiteral("SRC_X")),
        PropertyDefinition(QByteArrayLiteral("SRC_Y")),
        PropertyDefinition(QByteArrayLiteral("SRC_W")),
        PropertyDefinition(QByteArrayLiteral("SRC_H")),
        PropertyDefinition(QByteArrayLiteral("CRTC_X")),
        PropertyDefinition(QByteArrayLiteral("CRTC_Y")),
        PropertyDefinition(QByteArrayLiteral("CRTC_W")),
        PropertyDefinition(QByteArrayLiteral("CRTC_H")),
        PropertyDefinition(QByteArrayLiteral("FB_ID")),
        PropertyDefinition(QByteArrayLiteral("CRTC_ID")),
        PropertyDefinition(QByteArrayLiteral("rotation"), {
            QByteArrayLiteral("rotate-0"),
            QByteArrayLiteral("rotate-90"),
            QByteArrayLiteral("rotate-180"),
            QByteArrayLiteral("rotate-270"),
            QByteArrayLiteral("reflect-x"),
            QByteArrayLiteral("reflect-y")}),
        }, DRM_MODE_OBJECT_PLANE
    );
    if (success) {
        m_supportedTransformations = Transformations();
        auto checkSupport = [this] (uint64_t value, Transformation t) {
            if (propHasEnum(PropertyIndex::Rotation, value)) {
                m_supportedTransformations |= t;
            }
        };
        checkSupport(0, Transformation::Rotate0);
        checkSupport(1, Transformation::Rotate90);
        checkSupport(2, Transformation::Rotate180);
        checkSupport(3, Transformation::Rotate270);
        checkSupport(4, Transformation::ReflectX);
        checkSupport(5, Transformation::ReflectY);
    }
    return success;
}

DrmPlane::TypeIndex DrmPlane::type()
{
    auto property = m_props.at(static_cast<uint32_t>(PropertyIndex::Type));
    if (!property) {
        return TypeIndex::Overlay;
    }
    for (uint32_t i = 0; i < static_cast<uint32_t>(TypeIndex::Count); i++) {
        if (property->enumMap(i) == property->value()) {
            return TypeIndex(i);
        }
    }
    return TypeIndex::Overlay;
}

void DrmPlane::setNext(const QSharedPointer<DrmBuffer> &b)
{
    setValue(PropertyIndex::FbId, b ? b->bufferId() : 0);
    m_next = b;
}

void DrmPlane::setTransformation(Transformations t)
{
    setValue(PropertyIndex::Rotation, t);
}

DrmPlane::Transformations DrmPlane::transformation()
{
    if (auto property = m_props.at(static_cast<uint32_t>(PropertyIndex::Rotation))) {
        return Transformations(static_cast<uint32_t>(property->value()));
    }
    return Transformations(Transformation::Rotate0);
}

void DrmPlane::flipBuffer()
{
    m_current = m_next;
    m_next = nullptr;
}

}