615 lines
25 KiB
C++
615 lines
25 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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SPDX-FileCopyrightText: 2006 Lubos Lunak <l.lunak@kde.org>
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SPDX-FileCopyrightText: 2012 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "xcbutils.h"
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#include "utils.h"
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// Qt
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#include <QDebug>
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// xcb
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#include <xcb/composite.h>
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#include <xcb/damage.h>
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#include <xcb/randr.h>
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#include <xcb/render.h>
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#include <xcb/shape.h>
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#include <xcb/sync.h>
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#include <xcb/xfixes.h>
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#include <xcb/glx.h>
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// system
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#include <sys/shm.h>
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#include <sys/types.h>
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namespace KWin {
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namespace Xcb {
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static const int COMPOSITE_MAX_MAJOR = 0;
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static const int COMPOSITE_MAX_MINOR = 4;
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static const int DAMAGE_MAX_MAJOR = 1;
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static const int DAMAGE_MIN_MAJOR = 1;
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static const int SYNC_MAX_MAJOR = 3;
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static const int SYNC_MAX_MINOR = 0;
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static const int RANDR_MAX_MAJOR = 1;
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static const int RANDR_MAX_MINOR = 4;
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static const int RENDER_MAX_MAJOR = 0;
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static const int RENDER_MAX_MINOR = 11;
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static const int XFIXES_MAX_MAJOR = 5;
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static const int XFIXES_MAX_MINOR = 0;
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QVector<QByteArray> shapeOpCodes()
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{
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// see https://www.x.org/releases/X11R7.7/doc/xextproto/shape.html
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// extracted from <xcb/shape.h>
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return QVector<QByteArray>({QByteArrayLiteral("QueryVersion"),
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QByteArrayLiteral("Rectangles"),
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QByteArrayLiteral("Mask"),
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QByteArrayLiteral("Combine"),
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QByteArrayLiteral("Offset"),
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QByteArrayLiteral("Extents"),
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QByteArrayLiteral("Input"),
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QByteArrayLiteral("InputSelected"),
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QByteArrayLiteral("GetRectangles")});
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}
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QVector<QByteArray> randrOpCodes()
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{
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// see https://www.x.org/releases/X11R7.7/doc/randrproto/randrproto.txt
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// extracted from <xcb/randr.h>
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return QVector<QByteArray>({QByteArrayLiteral("QueryVersion"),
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QByteArray(""), // doesn't exist
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QByteArrayLiteral("SetScreenConfig"),
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QByteArray(""), // doesn't exits
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QByteArrayLiteral("SelectInput"),
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QByteArrayLiteral("GetScreenInfo"),
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QByteArrayLiteral("GetScreenSizeRange"),
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QByteArrayLiteral("SetScreenSize"),
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QByteArrayLiteral("GetScreenResources"),
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QByteArrayLiteral("GetOutputInfo"),
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QByteArrayLiteral("ListOutputProperties"),
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QByteArrayLiteral("QueryOutputProperty"),
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QByteArrayLiteral("ConfigureOutputProperty"),
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QByteArrayLiteral("ChangeOutputProperty"),
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QByteArrayLiteral("DeleteOutputProperty"),
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QByteArrayLiteral("GetOutputproperty"),
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QByteArrayLiteral("CreateMode"),
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QByteArrayLiteral("DestroyMode"),
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QByteArrayLiteral("AddOutputMode"),
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QByteArrayLiteral("DeleteOutputMode"),
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QByteArrayLiteral("GetCrtcInfo"),
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QByteArrayLiteral("SetCrtcConfig"),
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QByteArrayLiteral("GetCrtcGammaSize"),
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QByteArrayLiteral("GetCrtcGamma"),
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QByteArrayLiteral("SetCrtcGamma"),
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QByteArrayLiteral("GetScreenResourcesCurrent"),
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QByteArrayLiteral("SetCrtcTransform"),
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QByteArrayLiteral("GetCrtcTransform"),
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QByteArrayLiteral("GetPanning"),
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QByteArrayLiteral("SetPanning"),
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QByteArrayLiteral("SetOutputPrimary"),
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QByteArrayLiteral("GetOutputPrimary"),
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QByteArrayLiteral("GetProviders"),
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QByteArrayLiteral("GetProviderInfo"),
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QByteArrayLiteral("SetProviderOffloadSink"),
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QByteArrayLiteral("SetProviderOutputSource"),
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QByteArrayLiteral("ListProviderProperties"),
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QByteArrayLiteral("QueryProviderProperty"),
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QByteArrayLiteral("ConfigureProviderroperty"),
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QByteArrayLiteral("ChangeProviderProperty"),
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QByteArrayLiteral("DeleteProviderProperty"),
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QByteArrayLiteral("GetProviderProperty")});
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}
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QVector<QByteArray> randrErrorCodes()
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{
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// see https://www.x.org/releases/X11R7.7/doc/randrproto/randrproto.txt
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// extracted from <xcb/randr.h>
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return QVector<QByteArray>({QByteArrayLiteral("BadOutput"),
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QByteArrayLiteral("BadCrtc"),
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QByteArrayLiteral("BadMode"),
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QByteArrayLiteral("BadProvider")});
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}
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QVector<QByteArray> damageOpCodes()
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{
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// see https://www.x.org/releases/X11R7.7/doc/damageproto/damageproto.txt
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// extracted from <xcb/damage.h>
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return QVector<QByteArray>({QByteArrayLiteral("QueryVersion"),
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QByteArrayLiteral("Create"),
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QByteArrayLiteral("Destroy"),
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QByteArrayLiteral("Subtract"),
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QByteArrayLiteral("Add")});
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}
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QVector<QByteArray> damageErrorCodes()
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{
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// see https://www.x.org/releases/X11R7.7/doc/damageproto/damageproto.txt
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// extracted from <xcb/damage.h>
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return QVector<QByteArray>({QByteArrayLiteral("BadDamage")});
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}
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QVector<QByteArray> compositeOpCodes()
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{
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// see https://www.x.org/releases/X11R7.7/doc/compositeproto/compositeproto.txt
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// extracted from <xcb/composite.h>
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return QVector<QByteArray>({QByteArrayLiteral("QueryVersion"),
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QByteArrayLiteral("RedirectWindow"),
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QByteArrayLiteral("RedirectSubwindows"),
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QByteArrayLiteral("UnredirectWindow"),
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QByteArrayLiteral("UnredirectSubwindows"),
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QByteArrayLiteral("CreateRegionFromBorderClip"),
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QByteArrayLiteral("NameWindowPixmap"),
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QByteArrayLiteral("GetOverlayWindow"),
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QByteArrayLiteral("ReleaseOverlayWindow")});
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}
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QVector<QByteArray> fixesOpCodes()
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{
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// see https://www.x.org/releases/X11R7.7/doc/fixesproto/fixesproto.txt
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// extracted from <xcb/xfixes.h>
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return QVector<QByteArray>({QByteArrayLiteral("QueryVersion"),
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QByteArrayLiteral("ChangeSaveSet"),
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QByteArrayLiteral("SelectSelectionInput"),
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QByteArrayLiteral("SelectCursorInput"),
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QByteArrayLiteral("GetCursorImage"),
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QByteArrayLiteral("CreateRegion"),
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QByteArrayLiteral("CreateRegionFromBitmap"),
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QByteArrayLiteral("CreateRegionFromWindow"),
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QByteArrayLiteral("CreateRegionFromGc"),
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QByteArrayLiteral("CreateRegionFromPicture"),
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QByteArrayLiteral("DestroyRegion"),
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QByteArrayLiteral("SetRegion"),
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QByteArrayLiteral("CopyRegion"),
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QByteArrayLiteral("UnionRegion"),
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QByteArrayLiteral("IntersectRegion"),
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QByteArrayLiteral("SubtractRegion"),
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QByteArrayLiteral("InvertRegion"),
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QByteArrayLiteral("TranslateRegion"),
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QByteArrayLiteral("RegionExtents"),
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QByteArrayLiteral("FetchRegion"),
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QByteArrayLiteral("SetGcClipRegion"),
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QByteArrayLiteral("SetWindowShapeRegion"),
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QByteArrayLiteral("SetPictureClipRegion"),
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QByteArrayLiteral("SetCursorName"),
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QByteArrayLiteral("GetCursorName"),
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QByteArrayLiteral("GetCursorImageAndName"),
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QByteArrayLiteral("ChangeCursor"),
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QByteArrayLiteral("ChangeCursorByName"),
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QByteArrayLiteral("ExpandRegion"),
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QByteArrayLiteral("HideCursor"),
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QByteArrayLiteral("ShowCursor"),
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QByteArrayLiteral("CreatePointerBarrier"),
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QByteArrayLiteral("DeletePointerBarrier")});
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}
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QVector<QByteArray> fixesErrorCodes()
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{
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// see https://www.x.org/releases/X11R7.7/doc/fixesproto/fixesproto.txt
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// extracted from <xcb/xfixes.h>
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return QVector<QByteArray>({QByteArrayLiteral("BadRegion")});
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}
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QVector<QByteArray> renderOpCodes()
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{
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// see https://www.x.org/releases/X11R7.7/doc/renderproto/renderproto.txt
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// extracted from <xcb/render.h>
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return QVector<QByteArray>({QByteArrayLiteral("QueryVersion"),
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QByteArrayLiteral("QueryPictFormats"),
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QByteArrayLiteral("QueryPictIndexValues"),
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QByteArrayLiteral("CreatePicture"),
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QByteArrayLiteral("ChangePicture"),
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QByteArrayLiteral("SetPictureClipRectangles"),
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QByteArrayLiteral("FreePicture"),
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QByteArrayLiteral("Composite"),
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QByteArrayLiteral("Trapezoids"),
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QByteArrayLiteral("Triangles"),
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QByteArrayLiteral("TriStrip"),
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QByteArrayLiteral("TriFan"),
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QByteArrayLiteral("CreateGlyphSet"),
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QByteArrayLiteral("ReferenceGlyphSet"),
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QByteArrayLiteral("FreeGlyphSet"),
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QByteArrayLiteral("AddGlyphs"),
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QByteArrayLiteral("FreeGlyphs"),
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QByteArrayLiteral("CompositeGlyphs8"),
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QByteArrayLiteral("CompositeGlyphs16"),
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QByteArrayLiteral("CompositeGlyphs32"),
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QByteArrayLiteral("FillRectangles"),
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QByteArrayLiteral("CreateCursor"),
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QByteArrayLiteral("SetPictureTransform"),
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QByteArrayLiteral("QueryFilters"),
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QByteArrayLiteral("SetPictureFilter"),
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QByteArrayLiteral("CreateAnimCursor"),
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QByteArrayLiteral("AddTraps"),
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QByteArrayLiteral("CreateSolidFill"),
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QByteArrayLiteral("CreateLinearGradient"),
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QByteArrayLiteral("CreateRadialGradient"),
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QByteArrayLiteral("CreateConicalGradient")});
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}
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QVector<QByteArray> syncOpCodes()
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{
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// see https://www.x.org/releases/X11R7.7/doc/xextproto/sync.html
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// extracted from <xcb/sync.h>
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return QVector<QByteArray>({QByteArrayLiteral("Initialize"),
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QByteArrayLiteral("ListSystemCounters"),
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QByteArrayLiteral("CreateCounter"),
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QByteArrayLiteral("DestroyCounter"),
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QByteArrayLiteral("QueryCounter"),
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QByteArrayLiteral("Await"),
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QByteArrayLiteral("ChangeCounter"),
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QByteArrayLiteral("SetCounter"),
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QByteArrayLiteral("CreateAlarm"),
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QByteArrayLiteral("ChangeAlarm"),
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QByteArrayLiteral("DestroyAlarm"),
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QByteArrayLiteral("QueryAlarm"),
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QByteArrayLiteral("SetPriority"),
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QByteArrayLiteral("GetPriority"),
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QByteArrayLiteral("CreateFence"),
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QByteArrayLiteral("TriggerFence"),
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QByteArrayLiteral("ResetFence"),
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QByteArrayLiteral("DestroyFence"),
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QByteArrayLiteral("QueryFence"),
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QByteArrayLiteral("AwaitFence")});
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}
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static QVector<QByteArray> glxOpCodes()
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{
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return QVector<QByteArray>{
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QByteArrayLiteral(""),
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QByteArrayLiteral("Render"),
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QByteArrayLiteral("RenderLarge"),
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QByteArrayLiteral("CreateContext"),
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QByteArrayLiteral("DestroyContext"),
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QByteArrayLiteral("MakeCurrent"),
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QByteArrayLiteral("IsDirect"),
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QByteArrayLiteral("QueryVersion"),
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QByteArrayLiteral("WaitGL"),
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QByteArrayLiteral("WaitX"),
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QByteArrayLiteral("CopyContext"),
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QByteArrayLiteral("SwapBuffers"),
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QByteArrayLiteral("UseXFont"),
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QByteArrayLiteral("CreateGLXPixmap"),
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QByteArrayLiteral("GetVisualConfigs"),
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QByteArrayLiteral("DestroyGLXPixmap"),
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QByteArrayLiteral("VendorPrivate"),
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QByteArrayLiteral("VendorPrivateWithReply"),
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QByteArrayLiteral("QueryExtensionsString"),
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QByteArrayLiteral("QueryServerString"),
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QByteArrayLiteral("ClientInfo"),
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QByteArrayLiteral("GetFBConfigs"),
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QByteArrayLiteral("CreatePixmap"),
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QByteArrayLiteral("DestroyPixmap"),
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QByteArrayLiteral("CreateNewContext"),
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QByteArrayLiteral("QueryContext"),
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QByteArrayLiteral("MakeContextCurrent"),
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QByteArrayLiteral("CreatePbuffer"),
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QByteArrayLiteral("DestroyPbuffer"),
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QByteArrayLiteral("GetDrawableAttributes"),
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QByteArrayLiteral("ChangeDrawableAttributes"),
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QByteArrayLiteral("CreateWindow"),
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QByteArrayLiteral("DeleteWindow"),
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QByteArrayLiteral("SetClientInfoARB"),
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QByteArrayLiteral("CreateContextAttribsARB"),
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QByteArrayLiteral("SetClientInfo2ARB")
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// Opcodes 36-100 are unused
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// The GL single commands begin at opcode 101
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};
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}
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static QVector<QByteArray> glxErrorCodes()
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{
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return QVector<QByteArray>{
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QByteArrayLiteral("BadContext"),
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QByteArrayLiteral("BadContextState"),
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QByteArrayLiteral("BadDrawable"),
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QByteArrayLiteral("BadPixmap"),
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QByteArrayLiteral("BadContextTag"),
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QByteArrayLiteral("BadCurrentWindow"),
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QByteArrayLiteral("BadRenderRequest"),
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QByteArrayLiteral("BadLargeRequest"),
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QByteArrayLiteral("UnsupportedPrivateRequest"),
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QByteArrayLiteral("BadFBConfig"),
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QByteArrayLiteral("BadPbuffer"),
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QByteArrayLiteral("BadCurrentDrawable"),
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QByteArrayLiteral("BadWindow"),
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QByteArrayLiteral("GLXBadProfileARB")
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};
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}
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ExtensionData::ExtensionData()
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: version(0)
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, eventBase(0)
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, errorBase(0)
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, majorOpcode(0)
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, present(0)
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{
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}
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template<typename reply, typename T, typename F>
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void Extensions::initVersion(T cookie, F f, ExtensionData *dataToFill)
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{
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ScopedCPointer<reply> version(f(connection(), cookie, nullptr));
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dataToFill->version = version->major_version * 0x10 + version->minor_version;
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}
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Extensions *Extensions::s_self = nullptr;
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Extensions *Extensions::self()
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{
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if (!s_self) {
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s_self = new Extensions();
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}
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return s_self;
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}
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void Extensions::destroy()
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{
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delete s_self;
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s_self = nullptr;
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}
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Extensions::Extensions()
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{
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init();
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}
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Extensions::~Extensions()
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{
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}
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void Extensions::init()
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{
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xcb_connection_t *c = connection();
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xcb_prefetch_extension_data(c, &xcb_shape_id);
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xcb_prefetch_extension_data(c, &xcb_randr_id);
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xcb_prefetch_extension_data(c, &xcb_damage_id);
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xcb_prefetch_extension_data(c, &xcb_composite_id);
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xcb_prefetch_extension_data(c, &xcb_xfixes_id);
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xcb_prefetch_extension_data(c, &xcb_render_id);
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xcb_prefetch_extension_data(c, &xcb_sync_id);
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xcb_prefetch_extension_data(c, &xcb_glx_id);
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m_shape.name = QByteArray("SHAPE");
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m_randr.name = QByteArray("RANDR");
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m_damage.name = QByteArray("DAMAGE");
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m_composite.name = QByteArray("Composite");
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m_fixes.name = QByteArray("XFIXES");
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m_render.name = QByteArray("RENDER");
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m_sync.name = QByteArray("SYNC");
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m_glx.name = QByteArray("GLX");
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m_shape.opCodes = shapeOpCodes();
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m_randr.opCodes = randrOpCodes();
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m_damage.opCodes = damageOpCodes();
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m_composite.opCodes = compositeOpCodes();
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m_fixes.opCodes = fixesOpCodes();
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m_render.opCodes = renderOpCodes();
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m_sync.opCodes = syncOpCodes();
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m_glx.opCodes = glxOpCodes();
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m_randr.errorCodes = randrErrorCodes();
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m_damage.errorCodes = damageErrorCodes();
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m_fixes.errorCodes = fixesErrorCodes();
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m_glx.errorCodes = glxErrorCodes();
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extensionQueryReply(xcb_get_extension_data(c, &xcb_shape_id), &m_shape);
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extensionQueryReply(xcb_get_extension_data(c, &xcb_randr_id), &m_randr);
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extensionQueryReply(xcb_get_extension_data(c, &xcb_damage_id), &m_damage);
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extensionQueryReply(xcb_get_extension_data(c, &xcb_composite_id), &m_composite);
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extensionQueryReply(xcb_get_extension_data(c, &xcb_xfixes_id), &m_fixes);
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extensionQueryReply(xcb_get_extension_data(c, &xcb_render_id), &m_render);
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extensionQueryReply(xcb_get_extension_data(c, &xcb_sync_id), &m_sync);
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extensionQueryReply(xcb_get_extension_data(c, &xcb_glx_id), &m_glx);
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// extension specific queries
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xcb_shape_query_version_cookie_t shapeVersion;
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xcb_randr_query_version_cookie_t randrVersion;
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xcb_damage_query_version_cookie_t damageVersion;
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xcb_composite_query_version_cookie_t compositeVersion;
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xcb_xfixes_query_version_cookie_t xfixesVersion;
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xcb_render_query_version_cookie_t renderVersion;
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xcb_sync_initialize_cookie_t syncVersion;
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if (m_shape.present) {
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shapeVersion = xcb_shape_query_version_unchecked(c);
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}
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if (m_randr.present) {
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randrVersion = xcb_randr_query_version_unchecked(c, RANDR_MAX_MAJOR, RANDR_MAX_MINOR);
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xcb_randr_select_input(connection(), rootWindow(), XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE);
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}
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if (m_damage.present) {
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damageVersion = xcb_damage_query_version_unchecked(c, DAMAGE_MAX_MAJOR, DAMAGE_MIN_MAJOR);
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}
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if (m_composite.present) {
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compositeVersion = xcb_composite_query_version_unchecked(c, COMPOSITE_MAX_MAJOR, COMPOSITE_MAX_MINOR);
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}
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if (m_fixes.present) {
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xfixesVersion = xcb_xfixes_query_version_unchecked(c, XFIXES_MAX_MAJOR, XFIXES_MAX_MINOR);
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}
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if (m_render.present) {
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renderVersion = xcb_render_query_version_unchecked(c, RENDER_MAX_MAJOR, RENDER_MAX_MINOR);
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}
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if (m_sync.present) {
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syncVersion = xcb_sync_initialize(c, SYNC_MAX_MAJOR, SYNC_MAX_MINOR);
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}
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// handle replies
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if (m_shape.present) {
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initVersion<xcb_shape_query_version_reply_t>(shapeVersion, &xcb_shape_query_version_reply, &m_shape);
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}
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if (m_randr.present) {
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initVersion<xcb_randr_query_version_reply_t>(randrVersion, &xcb_randr_query_version_reply, &m_randr);
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}
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if (m_damage.present) {
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initVersion<xcb_damage_query_version_reply_t>(damageVersion, &xcb_damage_query_version_reply, &m_damage);
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}
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if (m_composite.present) {
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initVersion<xcb_composite_query_version_reply_t>(compositeVersion, &xcb_composite_query_version_reply, &m_composite);
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}
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if (m_fixes.present) {
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initVersion<xcb_xfixes_query_version_reply_t>(xfixesVersion, &xcb_xfixes_query_version_reply, &m_fixes);
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}
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if (m_render.present) {
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initVersion<xcb_render_query_version_reply_t>(renderVersion, &xcb_render_query_version_reply, &m_render);
|
|
}
|
|
if (m_sync.present) {
|
|
initVersion<xcb_sync_initialize_reply_t>(syncVersion, &xcb_sync_initialize_reply, &m_sync);
|
|
}
|
|
qCDebug(KWIN_CORE) << "Extensions: shape: 0x" << QString::number(m_shape.version, 16)
|
|
<< " composite: 0x" << QString::number(m_composite.version, 16)
|
|
<< " render: 0x" << QString::number(m_render.version, 16)
|
|
<< " fixes: 0x" << QString::number(m_fixes.version, 16)
|
|
<< " randr: 0x" << QString::number(m_randr.version, 16)
|
|
<< " sync: 0x" << QString::number(m_sync.version, 16)
|
|
<< " damage: 0x " << QString::number(m_damage.version, 16);
|
|
}
|
|
|
|
void Extensions::extensionQueryReply(const xcb_query_extension_reply_t *extension, ExtensionData *dataToFill)
|
|
{
|
|
if (!extension) {
|
|
return;
|
|
}
|
|
dataToFill->present = extension->present;
|
|
dataToFill->eventBase = extension->first_event;
|
|
dataToFill->errorBase = extension->first_error;
|
|
dataToFill->majorOpcode = extension->major_opcode;
|
|
}
|
|
|
|
int Extensions::damageNotifyEvent() const
|
|
{
|
|
return m_damage.eventBase + XCB_DAMAGE_NOTIFY;
|
|
}
|
|
|
|
bool Extensions::hasShape(xcb_window_t w) const
|
|
{
|
|
if (!isShapeAvailable()) {
|
|
return false;
|
|
}
|
|
ScopedCPointer<xcb_shape_query_extents_reply_t> extents(xcb_shape_query_extents_reply(
|
|
connection(), xcb_shape_query_extents_unchecked(connection(), w), nullptr));
|
|
if (extents.isNull()) {
|
|
return false;
|
|
}
|
|
return extents->bounding_shaped > 0;
|
|
}
|
|
|
|
bool Extensions::isCompositeOverlayAvailable() const
|
|
{
|
|
return m_composite.version >= 0x03; // 0.3
|
|
}
|
|
|
|
bool Extensions::isFixesRegionAvailable() const
|
|
{
|
|
return m_fixes.version >= 0x30; // 3
|
|
}
|
|
|
|
int Extensions::fixesCursorNotifyEvent() const
|
|
{
|
|
return m_fixes.eventBase + XCB_XFIXES_CURSOR_NOTIFY;
|
|
}
|
|
|
|
int Extensions::fixesSelectionNotifyEvent() const
|
|
{
|
|
return m_fixes.eventBase + XCB_XFIXES_SELECTION_NOTIFY;
|
|
}
|
|
|
|
bool Extensions::isShapeInputAvailable() const
|
|
{
|
|
return m_shape.version >= 0x11; // 1.1
|
|
}
|
|
|
|
int Extensions::randrNotifyEvent() const
|
|
{
|
|
return m_randr.eventBase + XCB_RANDR_SCREEN_CHANGE_NOTIFY;
|
|
}
|
|
|
|
int Extensions::shapeNotifyEvent() const
|
|
{
|
|
return m_shape.eventBase + XCB_SHAPE_NOTIFY;
|
|
}
|
|
|
|
int Extensions::syncAlarmNotifyEvent() const
|
|
{
|
|
return m_sync.eventBase + XCB_SYNC_ALARM_NOTIFY;
|
|
}
|
|
|
|
QVector<ExtensionData> Extensions::extensions() const
|
|
{
|
|
return {
|
|
m_shape,
|
|
m_randr,
|
|
m_damage,
|
|
m_composite,
|
|
m_render,
|
|
m_fixes,
|
|
m_sync,
|
|
m_glx
|
|
};
|
|
}
|
|
|
|
//****************************************
|
|
// Shm
|
|
//****************************************
|
|
Shm::Shm()
|
|
: m_shmId(-1)
|
|
, m_buffer(nullptr)
|
|
, m_segment(XCB_NONE)
|
|
, m_valid(false)
|
|
, m_pixmapFormat(XCB_IMAGE_FORMAT_XY_BITMAP)
|
|
{
|
|
m_valid = init();
|
|
}
|
|
|
|
Shm::~Shm()
|
|
{
|
|
if (m_valid) {
|
|
xcb_shm_detach(connection(), m_segment);
|
|
shmdt(m_buffer);
|
|
}
|
|
}
|
|
|
|
bool Shm::init()
|
|
{
|
|
const xcb_query_extension_reply_t *ext = xcb_get_extension_data(connection(), &xcb_shm_id);
|
|
if (!ext || !ext->present) {
|
|
qCDebug(KWIN_CORE) << "SHM extension not available";
|
|
return false;
|
|
}
|
|
ScopedCPointer<xcb_shm_query_version_reply_t> version(xcb_shm_query_version_reply(connection(),
|
|
xcb_shm_query_version_unchecked(connection()), nullptr));
|
|
if (version.isNull()) {
|
|
qCDebug(KWIN_CORE) << "Failed to get SHM extension version information";
|
|
return false;
|
|
}
|
|
m_pixmapFormat = version->pixmap_format;
|
|
const int MAXSIZE = 4096 * 2048 * 4; // TODO check there are not larger windows
|
|
m_shmId = shmget(IPC_PRIVATE, MAXSIZE, IPC_CREAT | 0600);
|
|
if (m_shmId < 0) {
|
|
qCDebug(KWIN_CORE) << "Failed to allocate SHM segment";
|
|
return false;
|
|
}
|
|
m_buffer = shmat(m_shmId, nullptr, 0 /*read/write*/);
|
|
if (-1 == reinterpret_cast<long>(m_buffer)) {
|
|
qCDebug(KWIN_CORE) << "Failed to attach SHM segment";
|
|
shmctl(m_shmId, IPC_RMID, nullptr);
|
|
return false;
|
|
}
|
|
shmctl(m_shmId, IPC_RMID, nullptr);
|
|
|
|
m_segment = xcb_generate_id(connection());
|
|
const xcb_void_cookie_t cookie = xcb_shm_attach_checked(connection(), m_segment, m_shmId, false);
|
|
ScopedCPointer<xcb_generic_error_t> error(xcb_request_check(connection(), cookie));
|
|
if (!error.isNull()) {
|
|
qCDebug(KWIN_CORE) << "xcb_shm_attach error: " << error->error_code;
|
|
shmdt(m_buffer);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace Xcb
|
|
} // namespace KWin
|