304528e80b
Summary: Weston does something similar https://cgit.freedesktop.org/wayland/weston/tree/libweston/compositor-fbdev.c#n315 ...and it seems that the non-primary framebuffer devices start completely off. (the screen is off on my Displayport device, and the window for the second vga card in qemu is much smaller than the primary one, and all black for my qemu vm) . In my testing, sending the ioctl FBIOPUT_VSCREENINFO with a *changed* &varinfo allows it to wake up, and turns on the screen. doing FBIOGET_VSCREENINFO and then FBIOPUT_VSCREENINFO in my testing does not work. I think really the values that end up getting changed are varinfo.transp.offset and varinfo.transp.length. at least on the qemu system, but in this patch I am aligning all of them for completeness, because the drivers might do it differently for qemu Test Plan: This causes the window for /dev/fb1 (remote-viewer, and a qemu vm with two "VGA" (bochsdrm) cards) to resize from the smaller size when specifying it as the --fb-device on seat0, and kwin draws on the device. Reviewers: #kwin, davidedmundson, graesslin Reviewed By: #kwin, graesslin Subscribers: zzag, davidedmundson, rkflx, graesslin, kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D9572
111 lines
2.8 KiB
C++
111 lines
2.8 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_FB_BACKEND_H
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#define KWIN_FB_BACKEND_H
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#include "platform.h"
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#include <QImage>
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#include <QSize>
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namespace KWin
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{
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class KWIN_EXPORT FramebufferBackend : public Platform
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{
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Q_OBJECT
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Q_INTERFACES(KWin::Platform)
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Q_PLUGIN_METADATA(IID "org.kde.kwin.Platform" FILE "fbdev.json")
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public:
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explicit FramebufferBackend(QObject *parent = nullptr);
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virtual ~FramebufferBackend();
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Screens *createScreens(QObject *parent = nullptr) override;
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QPainterBackend *createQPainterBackend() override;
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QSize screenSize() const override {
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return m_resolution;
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}
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void init() override;
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bool isValid() const {
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return m_fd >= 0;
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}
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QSize size() const {
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return m_resolution;
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}
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QSize physicalSize() const {
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return m_physicalSize;
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}
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void map();
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void unmap();
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void *mappedMemory() const {
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return m_memory;
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}
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int bytesPerLine() const {
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return m_bytesPerLine;
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}
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int bufferSize() const {
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return m_bufferLength;
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}
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quint32 bitsPerPixel() const {
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return m_bitsPerPixel;
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}
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QImage::Format imageFormat() const;
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/**
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* @returns whether the imageFormat is BGR instead of RGB.
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**/
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bool isBGR() const {
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return m_bgr;
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}
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QVector<CompositingType> supportedCompositors() const override {
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return QVector<CompositingType>{QPainterCompositing};
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}
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private:
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void openFrameBuffer();
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bool handleScreenInfo();
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void initImageFormat();
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QSize m_resolution;
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QSize m_physicalSize;
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QByteArray m_id;
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struct Color {
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quint32 offset;
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quint32 length;
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};
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Color m_red;
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Color m_green;
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Color m_blue;
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Color m_alpha;
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quint32 m_bitsPerPixel = 0;
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int m_fd = -1;
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quint32 m_bufferLength = 0;
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int m_bytesPerLine = 0;
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void *m_memory = nullptr;
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QImage::Format m_imageFormat = QImage::Format_Invalid;
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bool m_bgr = false;
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};
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}
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#endif
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