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Diffstat (limited to '')
| -rw-r--r-- | vcl/unx/generic/app/randrwrapper.cxx | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/vcl/unx/generic/app/randrwrapper.cxx b/vcl/unx/generic/app/randrwrapper.cxx new file mode 100644 index 000000000..431c70ae3 --- /dev/null +++ b/vcl/unx/generic/app/randrwrapper.cxx @@ -0,0 +1,181 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifdef USE_RANDR + +#include <X11/Xlib.h> +#include <X11/extensions/Xrandr.h> + +#include <sal/log.hxx> + +namespace +{ + +class RandRWrapper +{ + bool m_bValid; + + explicit RandRWrapper(Display*); +public: + static RandRWrapper& get(Display*); + static void releaseWrapper(); + + Bool XRRQueryExtension(Display* i_pDisp, int* o_event_base, int* o_error_base ) + { + Bool bRet = False; + if( m_bValid ) + bRet = ::XRRQueryExtension( i_pDisp, o_event_base, o_error_base ); + return bRet; + } + XRRScreenConfiguration* XRRGetScreenInfo( Display* i_pDisp, Drawable i_aDrawable ) + { + return m_bValid ? ::XRRGetScreenInfo( i_pDisp, i_aDrawable ) : nullptr; + } + void XRRFreeScreenConfigInfo( XRRScreenConfiguration* i_pConfig ) + { + if( m_bValid ) + ::XRRFreeScreenConfigInfo( i_pConfig ); + } + void XRRSelectInput( Display* i_pDisp, ::Window i_window, int i_nMask ) + { + if( m_bValid ) + ::XRRSelectInput( i_pDisp, i_window, i_nMask ); + } + int XRRUpdateConfiguration( XEvent* i_pEvent ) + { + return m_bValid ? ::XRRUpdateConfiguration( i_pEvent ) : 0; + } + XRRScreenSize* XRRConfigSizes( XRRScreenConfiguration* i_pConfig, int* o_nSizes ) + { + return m_bValid ? ::XRRConfigSizes( i_pConfig, o_nSizes ) : nullptr; + } + SizeID XRRConfigCurrentConfiguration( XRRScreenConfiguration* i_pConfig, Rotation* o_pRot ) + { + return m_bValid ? ::XRRConfigCurrentConfiguration( i_pConfig, o_pRot ) : 0; + } + int XRRRootToScreen( Display *dpy, ::Window root ) + { + return m_bValid ? ::XRRRootToScreen( dpy, root ) : -1; + } +}; + +RandRWrapper::RandRWrapper( Display* pDisplay ) : + m_bValid( true ) +{ + int nEventBase = 0, nErrorBase = 0; + if( !XRRQueryExtension( pDisplay, &nEventBase, &nErrorBase ) ) + m_bValid = false; +} + +RandRWrapper* pWrapper = nullptr; + +RandRWrapper& RandRWrapper::get( Display* i_pDisplay ) +{ + if( ! pWrapper ) + pWrapper = new RandRWrapper( i_pDisplay ); + return *pWrapper; +} + +void RandRWrapper::releaseWrapper() +{ + delete pWrapper; + pWrapper = nullptr; +} + +} // namespace + +#endif + +#include <unx/saldisp.hxx> +#if OSL_DEBUG_LEVEL > 1 +#include <cstdio> +#endif + +void SalDisplay::InitRandR( ::Window aRoot ) const +{ + #ifdef USE_RANDR + RandRWrapper::get( GetDisplay() ).XRRSelectInput( GetDisplay(), aRoot, RRScreenChangeNotifyMask ); + #else + (void)this; + (void)aRoot; + #endif +} + +void SalDisplay::DeInitRandR() +{ + #ifdef USE_RANDR + RandRWrapper::releaseWrapper(); +#if OSL_DEBUG_LEVEL > 1 + SAL_INFO("vcl.app", "SalDisplay::DeInitRandR()."); +#endif + #endif +} + +void SalDisplay::processRandREvent( XEvent* pEvent ) +{ +#ifdef USE_RANDR + XConfigureEvent* pCnfEvent=reinterpret_cast<XConfigureEvent*>(pEvent); + if( !pWrapper || pWrapper->XRRRootToScreen(GetDisplay(),pCnfEvent->window) == -1 ) + return; + + int nRet = pWrapper->XRRUpdateConfiguration( pEvent ); + if( nRet != 1 || pEvent->type == ConfigureNotify) // this should then be a XRRScreenChangeNotifyEvent + return; + + // update screens + bool bNotify = false; + for(ScreenData & rScreen : m_aScreens) + { + if( rScreen.m_bInit ) + { + XRRScreenConfiguration *pConfig = nullptr; + XRRScreenSize *pSizes = nullptr; + int nSizes = 0; + Rotation nRot = 0; + SizeID nId = 0; + + pConfig = pWrapper->XRRGetScreenInfo( GetDisplay(), rScreen.m_aRoot ); + nId = pWrapper->XRRConfigCurrentConfiguration( pConfig, &nRot ); + pSizes = pWrapper->XRRConfigSizes( pConfig, &nSizes ); + XRRScreenSize *pTargetSize = pSizes + nId; + + bNotify = bNotify || + rScreen.m_aSize.Width() != pTargetSize->width || + rScreen.m_aSize.Height() != pTargetSize->height; + + rScreen.m_aSize = Size( pTargetSize->width, pTargetSize->height ); + + pWrapper->XRRFreeScreenConfigInfo( pConfig ); + +#if OSL_DEBUG_LEVEL > 1 + SAL_INFO("vcl.app", "screen " << nId + << " changed to size " << (int)pTargetSize->width + << "x" << (int)pTargetSize->height); +#endif + } + } + if( bNotify ) + emitDisplayChanged(); +#else + (void)this; + (void)pEvent; +#endif +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |