56ce6689fd
Summary: The egl implementation for the virtual platform tries to use a render node if available. If there is no render node it looks for a virtual (kernel driver vgem) device, which unfortunately does not create a render node in mainline kernel (there are patches in ChromiumOS). For this the Udev wrapper is extended to search for renderNode devices and for virtual dri devices. If either render node or vgem dri device is found, it is tried to be opened (without logind escalation) and on success a gbm device is created on it. If any step of this fails the so far default behavior of default device is tried for creating the EGLDisplay. All of this is compile optional, so that the virtual platform does not hard depend on udev and/or gbm. Test Plan: Auto tests which need OpenGL executed and verified that they use the render node or vgem device. Reviewers: #kwin, #plasma_on_wayland Subscribers: plasma-devel, kwin Tags: #plasma_on_wayland, #kwin Differential Revision: https://phabricator.kde.org/D2216
86 lines
2.4 KiB
C++
86 lines
2.4 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_EGL_GBM_BACKEND_H
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#define KWIN_EGL_GBM_BACKEND_H
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#include "abstract_egl_backend.h"
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#include "scene_opengl.h"
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#include <config-kwin.h>
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#if HAVE_GBM
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struct gbm_device;
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#endif
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namespace KWin
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{
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class VirtualBackend;
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class GLTexture;
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class GLRenderTarget;
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/**
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* @brief OpenGL Backend using Egl on a GBM surface.
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**/
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class EglGbmBackend : public QObject, public AbstractEglBackend
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{
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Q_OBJECT
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public:
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EglGbmBackend(VirtualBackend *b);
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virtual ~EglGbmBackend();
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void screenGeometryChanged(const QSize &size) override;
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SceneOpenGL::TexturePrivate *createBackendTexture(SceneOpenGL::Texture *texture) override;
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QRegion prepareRenderingFrame() override;
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void endRenderingFrame(const QRegion &renderedRegion, const QRegion &damagedRegion) override;
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bool usesOverlayWindow() const override;
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void init() override;
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protected:
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void present() override;
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private:
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bool initializeEgl();
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bool initBufferConfigs();
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bool initRenderingContext();
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void initGbmDevice();
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VirtualBackend *m_backend;
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GLTexture *m_backBuffer = nullptr;
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GLRenderTarget *m_fbo = nullptr;
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int m_frameCounter = 0;
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#if HAVE_GBM
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gbm_device *m_device = nullptr;
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#endif
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int m_drmFd = -1;
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friend class EglGbmTexture;
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};
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/**
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* @brief Texture using an EGLImageKHR.
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**/
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class EglGbmTexture : public AbstractEglTexture
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{
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public:
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virtual ~EglGbmTexture();
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private:
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friend class EglGbmBackend;
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EglGbmTexture(SceneOpenGL::Texture *texture, EglGbmBackend *backend);
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};
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} // namespace
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#endif
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