c759551340
Introduces a new (optional) dependency: libdrm. The DrmBackend currently supports finding the first connected output. It can create shared memory buffers which are used by SceneQPainter to do double buffered rendering. There is still lots to do, the following things are not yet working: * multiple outputs * page flip * OpenGL (through gbm) * restoring mode setting to start value
99 lines
2.3 KiB
C++
99 lines
2.3 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#ifndef KWIN_DRM_BACKEND_H
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#define KWIN_DRM_BACKEND_H
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#include "abstract_backend.h"
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#include <QImage>
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#include <QSize>
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#include <xf86drmMode.h>
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namespace KWin
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{
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class Udev;
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class DrmBuffer;
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class KWIN_EXPORT DrmBackend : public AbstractBackend
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{
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Q_OBJECT
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public:
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explicit DrmBackend(QObject *parent = nullptr);
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virtual ~DrmBackend();
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Screens *createScreens(QObject *parent = nullptr) override;
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QPainterBackend *createQPainterBackend() override;
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void init();
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DrmBuffer *createBuffer(const QSize &size);
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void present(DrmBuffer *buffer);
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QSize size() const {
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// TODO: this is wrong
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return m_resolution;
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}
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int fd() const {
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return m_fd;
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}
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Q_SIGNALS:
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void screensQueried();
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private:
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void openDrm();
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void queryResources();
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QScopedPointer<Udev> m_udev;
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int m_fd = -1;
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int m_drmId = 0;
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// TODO: this is wrong
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QSize m_resolution;
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quint32 m_crtcId = 0;
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quint32 m_connector = 0;
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drmModeModeInfo m_mode;
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};
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class DrmBuffer
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{
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public:
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~DrmBuffer();
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bool map();
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QImage *image() const {
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return m_image;
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}
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private:
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friend class DrmBackend;
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DrmBuffer(DrmBackend *backend, const QSize &size);
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DrmBackend *m_backend;
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QSize m_size;
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quint32 m_handle = 0;
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quint32 m_bufferId = 0;
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quint32 m_stride = 0;
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quint64 m_bufferSize = 0;
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void *m_memory = nullptr;
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QImage *m_image = nullptr;
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};
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}
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#endif
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