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kwin/compositingprefs.cpp

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2007 Rivo Laks <rivolaks@hot.ee>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "compositingprefs.h"
#include "kwinglobals.h"
#include <kdebug.h>
#include <kxerrorhandler.h>
#include <klocale.h>
#include <kdeversion.h>
#include <kstandarddirs.h>
#include <qprocess.h>
namespace KWin
{
CompositingPrefs::CompositingPrefs()
: mXgl( false )
, mRecommendCompositing( false )
, mEnableVSync( true )
, mEnableDirectRendering( true )
, mStrictBinding( true )
{
}
CompositingPrefs::~CompositingPrefs()
{
}
bool CompositingPrefs::recommendCompositing() const
{
return mRecommendCompositing;
}
bool CompositingPrefs::compositingPossible()
{
#ifdef KWIN_HAVE_COMPOSITING
Extensions::init();
if( !Extensions::compositeAvailable())
{
kDebug( 1212 ) << "No composite extension available";
return false;
}
if( !Extensions::damageAvailable())
{
kDebug( 1212 ) << "No damage extension available";
return false;
}
#ifdef KWIN_HAVE_OPENGL_COMPOSITING
if( Extensions::glxAvailable())
return true;
#endif
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
if( Extensions::renderAvailable() && Extensions::fixesAvailable())
return true;
#endif
kDebug( 1212 ) << "No OpenGL or XRender/XFixes support";
return false;
#else
return false;
#endif
}
QString CompositingPrefs::compositingNotPossibleReason()
{
#ifdef KWIN_HAVE_COMPOSITING
Extensions::init();
if( !Extensions::compositeAvailable() || !Extensions::damageAvailable())
{
return i18n("Required X extensions (XComposite and XDamage) are not available.");
}
#if defined( KWIN_HAVE_OPENGL_COMPOSITING ) && !defined( KWIN_HAVE_XRENDER_COMPOSITING )
if( !Extensions::glxAvailable())
return i18n( "GLX/OpenGL are not available and only OpenGL support is compiled." );
#elif !defined( KWIN_HAVE_OPENGL_COMPOSITING ) && defined( KWIN_HAVE_XRENDER_COMPOSITING )
if( !( Extensions::renderAvailable() && Extensions::fixesAvailable()))
return i18n( "XRender/XFixes extensions are not available and only XRender support"
" is compiled." );
#else
if( !( Extensions::glxAvailable()
|| ( Extensions::renderAvailable() && Extensions::fixesAvailable())))
{
return i18n( "GLX/OpenGL and XRender/XFixes are not available." );
}
#endif
return QString();
#else
return i18n("Compositing was disabled at compile time.\n"
"It is likely Xorg development headers were not installed.");
#endif
}
void CompositingPrefs::detect()
{
if( !compositingPossible())
{
return;
}
#ifdef KWIN_HAVE_OPENGL_COMPOSITING
// HACK: This is needed for AIGLX
if( qstrcmp( qgetenv( "KWIN_DIRECT_GL" ), "1" ) != 0 )
{
// Start an external helper program that initializes GLX and returns
// 0 if we can use direct rendering, and 1 otherwise.
// The reason we have to use an external program is that after GLX
// has been initialized, it's too late to set the LIBGL_ALWAYS_INDIRECT
// environment variable.
// Direct rendering is preferred, since not all OpenGL extensions are
// available with indirect rendering.
const QString opengl_test = KStandardDirs::findExe( "kwin_opengl_test" );
if ( QProcess::execute( opengl_test ) != 0 )
setenv( "LIBGL_ALWAYS_INDIRECT", "1", true );
}
if( !Extensions::glxAvailable())
{
kDebug( 1212 ) << "No GLX available";
return;
}
int glxmajor, glxminor;
glXQueryVersion( display(), &glxmajor, &glxminor );
kDebug( 1212 ) << "glx version is " << glxmajor << "." << glxminor;
bool hasglx13 = ( glxmajor > 1 || ( glxmajor == 1 && glxminor >= 3 ));
// remember and later restore active context
GLXContext oldcontext = glXGetCurrentContext();
GLXDrawable olddrawable = glXGetCurrentDrawable();
GLXDrawable oldreaddrawable = None;
if( hasglx13 )
oldreaddrawable = glXGetCurrentReadDrawable();
if( initGLXContext() )
{
detectDriverAndVersion();
applyDriverSpecificOptions();
}
if( hasglx13 )
glXMakeContextCurrent( display(), olddrawable, oldreaddrawable, oldcontext );
else
glXMakeCurrent( display(), olddrawable, oldcontext );
deleteGLXContext();
#endif
}
bool CompositingPrefs::initGLXContext()
{
#ifdef KWIN_HAVE_OPENGL_COMPOSITING
mGLContext = NULL;
KXErrorHandler handler;
// Most of this code has been taken from glxinfo.c
QVector<int> attribs;
attribs << GLX_RGBA;
attribs << GLX_RED_SIZE << 1;
attribs << GLX_GREEN_SIZE << 1;
attribs << GLX_BLUE_SIZE << 1;
attribs << None;
XVisualInfo* visinfo = glXChooseVisual( display(), DefaultScreen( display()), attribs.data() );
if( !visinfo )
{
attribs.last() = GLX_DOUBLEBUFFER;
attribs << None;
visinfo = glXChooseVisual( display(), DefaultScreen( display()), attribs.data() );
if (!visinfo)
{
kDebug( 1212 ) << "Error: couldn't find RGB GLX visual";
return false;
}
}
mGLContext = glXCreateContext( display(), visinfo, NULL, True );
if ( !mGLContext )
{
kDebug( 1212 ) << "glXCreateContext failed";
XDestroyWindow( display(), mGLWindow );
return false;
}
XSetWindowAttributes attr;
attr.background_pixel = 0;
attr.border_pixel = 0;
attr.colormap = XCreateColormap( display(), rootWindow(), visinfo->visual, AllocNone );
attr.event_mask = StructureNotifyMask | ExposureMask;
unsigned long mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
int width = 100, height = 100;
mGLWindow = XCreateWindow( display(), rootWindow(), 0, 0, width, height,
0, visinfo->depth, InputOutput,
visinfo->visual, mask, &attr );
return glXMakeCurrent( display(), mGLWindow, mGLContext ) && !handler.error( true );
#else
return false;
#endif
}
void CompositingPrefs::deleteGLXContext()
{
#ifdef KWIN_HAVE_OPENGL_COMPOSITING
if( mGLContext == NULL )
return;
glXDestroyContext( display(), mGLContext );
XDestroyWindow( display(), mGLWindow );
#endif
}
void CompositingPrefs::detectDriverAndVersion()
{
#ifdef KWIN_HAVE_OPENGL_COMPOSITING
mGLVendor = QString((const char*)glGetString( GL_VENDOR ));
mGLRenderer = QString((const char*)glGetString( GL_RENDERER ));
mGLVersion = QString((const char*)glGetString( GL_VERSION ));
mXgl = detectXgl();
if( mGLRenderer.startsWith( "Mesa DRI Intel" ) || mGLRenderer.startsWith( "Mesa DRI Mobile Intel" )) // krazy:exclude=strings
{
mDriver = "intel";
QStringList words = mGLRenderer.split(' ');
if( QRegExp( "[:digit:]+" ).exactMatch( words[ words.count() - 2 ] ))
mVersion = Version( words[ words.count() - 2 ] );
else
mVersion = Version( words[ words.count() - 3 ] );
}
else if( mGLVendor == "NVIDIA Corporation" )
{
mDriver = "nvidia";
QStringList words = mGLVersion.split(' ');
mVersion = Version( words[ words.count() - 1 ] );
}
else if( mGLVendor == "ATI Technologies Inc." )
{
mDriver = "fglrx";
// Ati changed the version string.
// The GL version is either in the first or second part
QStringList versionParts = mGLVersion.split(' ');
if( versionParts.first().count(".") == 2 || versionParts.count() == 1 )
mVersion = Version( versionParts.first() );
else
{
// version in second part is encapsulated in ()
mVersion = Version( versionParts[1].mid( 1, versionParts[1].length() -2 ) );
}
}
else if( mGLRenderer.startsWith( "Mesa DRI R" )) // krazy:exclude=strings
{
mDriver = "radeon";
mVersion = Version( mGLRenderer.split(' ')[ 3 ] );
// Check that the version string is changed, and try the fifth element if it does
if (!mVersion.startsWith("20"))
mVersion = Version( mGLRenderer.split(' ')[ 5 ] );
}
else if( mGLVendor == "nouveau" )
{
mDriver = "nouveau";
// use Gallium version number as the version - second part of renderer
mVersion = Version( mGLRenderer.split(' ')[ 1 ] );
}
else if( mGLRenderer == "Software Rasterizer" )
{
mDriver = "software";
QStringList words = mGLVersion.split(' ');
mVersion = Version( words[ words.count() - 1 ] );
}
else
{
mDriver = "unknown";
}
// Always output as it's VERY useful
kWarning( 1212 ) << "GL vendor is" << mGLVendor;
kWarning( 1212 ) << "GL renderer is" << mGLRenderer;
kWarning( 1212 ) << "GL version is" << mGLVersion;
if( mXgl )
kWarning( 1212 ) << "Using XGL";
kWarning( 1212 ) << "Detected driver" << mDriver << ", version" << mVersion.join(".");
#endif
}
// See http://techbase.kde.org/Projects/KWin/HW for a list of some cards that are known to work.
void CompositingPrefs::applyDriverSpecificOptions()
{
// Always recommend
mRecommendCompositing = true;
// Known driver specific options
if( mXgl )
{
mStrictBinding = false;
}
else if( mDriver == "intel" )
{
mEnableVSync = false;
}
else if( mDriver == "nvidia" )
{
mStrictBinding = false;
}
//else if( mDriver == "fglrx" )
// {
// }
//else if( mDriver == "radeon" )
// {
// }
//else if( mDriver == "software" )
// {
// }
}
bool CompositingPrefs::detectXgl()
{ // Xgl apparently uses only this specific X version
return VendorRelease(display()) == 70000001;
}
CompositingPrefs::Version::Version( const QString& str ) :
QStringList()
{
QRegExp numrx( "(\\d+)|(\\D+)" );
int pos = 0;
while(( pos = numrx.indexIn( str, pos )) != -1 )
{
pos += numrx.matchedLength();
QString part = numrx.cap();
if( part == "." )
continue;
append( part );
}
}
int CompositingPrefs::Version::compare( const Version& v ) const
{
for( int i = 0; i < qMin( count(), v.count() ); i++ )
{
if( at( i )[ 0 ].isDigit() )
{
// This part of version string is numeric - compare numbers
int num = at( i ).toInt();
int vnum = v.at( i ).toInt();
if( num > vnum )
return 1;
else if( num < vnum )
return -1;
}
else
{
// This part is string
if( at( i ) > v.at( i ))
return 1;
else if( at( i ) < v.at( i ))
return -1;
}
}
if( count() > v.count() )
return 1;
else if( count() < v.count() )
return -1;
else
return 0;
}
} // namespace
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