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/*===========================================================================*\
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*                                                                            *
*                              OpenFlipper                                   *
*      Copyright (C) 2001-2010 by Computer Graphics Group, RWTH Aachen       *
*                           www.openflipper.org                              *
*                                                                            *
*--------------------------------------------------------------------------- *
*  This file is part of OpenFlipper.                                         *
*                                                                            *
*  OpenFlipper is free software: you can redistribute it and/or modify       *
*  it under the terms of the GNU Lesser General Public License as            *
*  published by the Free Software Foundation, either version 3 of            *
*  the License, or (at your option) any later version with the               *
*  following exceptions:                                                     *
*                                                                            *
*  If other files instantiate templates or use macros                        *
*  or inline functions from this file, or you compile this file and          *
*  link it with other files to produce an executable, this file does         *
*  not by itself cause the resulting executable to be covered by the         *
*  GNU Lesser General Public License. This exception does not however        *
*  invalidate any other reasons why the executable file might be             *
*  covered by the GNU Lesser General Public License.                         *
*                                                                            *
*  OpenFlipper 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 Lesser General Public License for more details.                       *
*                                                                            *
*  You should have received a copy of the GNU LesserGeneral Public           *
*  License along with OpenFlipper. If not,                                   *
*  see <http://www.gnu.org/licenses/>.                                       *
*                                                                            *
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\*===========================================================================*/

/*===========================================================================*\
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*                                                                            *
*   $Revision$                                                       *
*   $LastChangedBy$                                                *
*   $Date$                     *
*                                                                            *
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\*===========================================================================*/
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//=============================================================================
//
//  CLASS Core - IMPLEMENTATION
//
//=============================================================================


//== INCLUDES =================================================================

#include "CoreWidget.hh"

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#include <QGLFormat>

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#include <OpenFlipper/common/GlobalOptions.hh>

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#ifndef WIN32
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  #ifndef ARCH_DARWIN
    #include <malloc.h>
  #endif
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#endif

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//== IMPLEMENTATION ==========================================================



void CoreWidget::showAboutWidget( ) {

  if ( OpenFlipper::Options::nogui() )
    return;
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  if ( aboutWidget_ == 0 ) {
    aboutWidget_ = new AboutWidget( this );
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  } else {
    aboutWidget_->OpenFlipperAbout->clear();
  }
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  QFont standardFont = aboutWidget_->OpenFlipperAbout->currentFont();
  QFont boldFont = standardFont;
  boldFont.setBold(true);
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(boldFont);
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  aboutWidget_->OpenFlipperAbout->append(tr("OpenFlipper Core Version: ") + OpenFlipper::Options::coreVersion() ) ;
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(standardFont);
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  // =====================================================================================
  // Directory info
  // =====================================================================================
  aboutWidget_->OpenFlipperAbout->append("\n");
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(boldFont);
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  aboutWidget_->OpenFlipperAbout->append(tr("OpenFlipper Directories:"));
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(standardFont);
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  // Get the dataDir
  QDir tempDir = QDir(OpenFlipper::Options::applicationDir());
  #ifdef OPENFLIPPER_DATADIR
    tempDir.cd(OPENFLIPPER_DATADIR);
  #endif
  aboutWidget_->OpenFlipperAbout->append("Data:\t " + tempDir.absolutePath() );
  aboutWidget_->OpenFlipperAbout->append("Shaders:\t " + OpenFlipper::Options::shaderDirStr() );
  aboutWidget_->OpenFlipperAbout->append("Textures:\t " + OpenFlipper::Options::textureDirStr() );
  aboutWidget_->OpenFlipperAbout->append("Scripts:\t " + OpenFlipper::Options::scriptDirStr() );
  aboutWidget_->OpenFlipperAbout->append("Icons:\t " + OpenFlipper::Options::iconDirStr() );
  aboutWidget_->OpenFlipperAbout->append("Fonts:\t" + OpenFlipper::Options::fontsDirStr() );
  aboutWidget_->OpenFlipperAbout->append("Help:\t" + OpenFlipper::Options::helpDirStr() );
  
  
  // =====================================================================================
  // Memory infos
  // =====================================================================================
  aboutWidget_->OpenFlipperAbout->append("\n");
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(boldFont);
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  aboutWidget_->OpenFlipperAbout->append(tr("Memory Information:"));    
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(standardFont);
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  #ifdef WIN32 
 
    aboutWidget_->OpenFlipperAbout->append(tr("Not available for this platform (WIN32)"));   

  #elif defined ARCH_DARWIN 

    aboutWidget_->OpenFlipperAbout->append(tr("Not available for this platform (MacOS)"));   

  #else
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    unsigned long memory = 0;
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    struct mallinfo info;
    info = mallinfo();
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    // add mmap-allocated memory
    memory += info.hblkhd;
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    // add sbrk-allocated memory
    memory += info.uordblks;
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    double mmapAllocated  = double(info.hblkhd  ) / 1024 / 1024;
    double sbrkAllocated  = double(info.uordblks) / 1024 / 1024;
    double totalAllocated = double(memory)        / 1024 / 1024;
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    double pageSize       = double(getpagesize()) /1024 ;
    double availablePages = double( sysconf (_SC_AVPHYS_PAGES) );
    double freeMem        = availablePages * pageSize / 1024;
    
    aboutWidget_->OpenFlipperAbout->append(tr("Total Memory allocated:\t ") + QString::number(totalAllocated,'f' ,2 ) + tr("MB ")
                                           + tr("( mmap: ") + QString::number(mmapAllocated ,'f' ,2 ) + tr("MB") 
                                           + tr(", sbrk: ") + QString::number(sbrkAllocated ,'f' ,2 ) + tr("MB )") );
    
    aboutWidget_->OpenFlipperAbout->append(tr("Free Memory:\t\t ") + QString::number(freeMem,'f' ,2 )  + tr("MB ")
                                           + tr("(") + QString::number(availablePages,'f' ,0 ) + tr(" pages of ") 
                                           + QString::number(pageSize,'f' ,2 ) + tr("KB size)"));
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  #endif
  
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  // =====================================================================================
  // Memory infos
  // =====================================================================================
  aboutWidget_->OpenFlipperAbout->append("\n");
  aboutWidget_->OpenFlipperAbout->setCurrentFont(boldFont);
  aboutWidget_->OpenFlipperAbout->append(tr("CPU Information:"));    
  aboutWidget_->OpenFlipperAbout->setCurrentFont(standardFont);  
  
  #ifdef WIN32 
  
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  QSettings settings("HKEY_LOCAL_MACHINE\\HARDWARE\\DESCRIPTION\\System\\CentralProcessor", QSettings::NativeFormat);

  QStringList cpus = settings.childGroups(); 
  if ( cpus.size() != 0 ) { 

    aboutWidget_->OpenFlipperAbout->append(tr("CPU vendor:\t\t ") + 
                                           settings.value( cpus[0]+"/VendorIdentifier", "Unknown" ).toString() );
    aboutWidget_->OpenFlipperAbout->append(tr("CPU model:\t\t ") + 
                                           settings.value( cpus[0]+"/ProcessorNameString", "Unknown" ).toString() );
    aboutWidget_->OpenFlipperAbout->append(tr("CPU identifier:\t\t ") + 
                                           settings.value( cpus[0]+"/Identifier", "Unknown" ).toString() );
    aboutWidget_->OpenFlipperAbout->append(tr("CPU Speed:\t\t ") + 
                                           settings.value( cpus[0]+"/~MHz", "Unknown" ).toString()+ " MHz" );

    aboutWidget_->OpenFlipperAbout->append("CPU Cores:\t\t " + QString::number(cpus.size())); 

  } else {
    aboutWidget_->OpenFlipperAbout->append(tr("Unable to retrieve CPU information"));
  }
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  #elif defined ARCH_DARWIN 
  
  aboutWidget_->OpenFlipperAbout->append(tr("Not available for this platform (MacOS)"));   
  
  #else
  QFile cpuinfo("/proc/cpuinfo");
  if (! cpuinfo.exists() )
    aboutWidget_->OpenFlipperAbout->append(tr("Unable to retrieve CPU information"));
  else {
    
    cpuinfo.open(QFile::ReadOnly);
    QTextStream stream(&cpuinfo);
    QStringList splitted = stream.readAll().split("\n",QString::SkipEmptyParts);
  
    int position = splitted.indexOf ( QRegExp("^vendor_id.*") );
    if ( position != -1 ){
      QString cpuVendor = splitted[position].section(':', -1).simplified();
      aboutWidget_->OpenFlipperAbout->append(tr("CPU vendor:\t\t ") + cpuVendor );
    } else {
      aboutWidget_->OpenFlipperAbout->append(tr("CPU vendor:\t\t vendor specification not found")); 
    }
    
    position = splitted.indexOf ( QRegExp("^model name.*") );
    if ( position != -1 ){
      QString cpuModel = splitted[position].section(':', -1).simplified();
      aboutWidget_->OpenFlipperAbout->append(tr("CPU model:\t\t ") + cpuModel );
    } else {
      aboutWidget_->OpenFlipperAbout->append(tr("CPU model:\t\t Model specification not found")); 
    }
    
    position = splitted.indexOf ( QRegExp("^cpu cores.*") );
    if ( position != -1 ){
      QString cpuCoresPhysical = splitted[position].section(':', -1).simplified();
      aboutWidget_->OpenFlipperAbout->append(tr("Physical CPU cores:\t\t ") + cpuCoresPhysical );
    } else {
      aboutWidget_->OpenFlipperAbout->append(tr("Physical CPU cores:\t\t CPU Core specification not found")); 
    }
    
    position = splitted.indexOf ( QRegExp("^siblings.*") );
    if ( position != -1 ){
      QString cpuCoresLogical = splitted[position].section(':', -1).simplified();
      aboutWidget_->OpenFlipperAbout->append(tr("Logical CPU cores:\t\t ") + cpuCoresLogical );
    } else {
      aboutWidget_->OpenFlipperAbout->append(tr("Logical CPU cores:\t\t CPU Core specification not found")); 
    }    
    
    position = splitted.indexOf ( QRegExp("^flags.*") );
    if ( position != -1 ){
      QString cpuFlags = splitted[position].section(':', -1).simplified();
      aboutWidget_->OpenFlipperAbout->append(tr("CPU capabilities:\t\t ") + cpuFlags );
    } else {
      aboutWidget_->OpenFlipperAbout->append(tr("CPU capabilities:\t\t CPU flag specification not found")); 
    }    
    
    
  }
  
  #endif
  
  
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  // =====================================================================================
  // OpenGL Renderer/Vendor and version info
  // =====================================================================================    
  aboutWidget_->OpenFlipperAbout->append("\n");
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(boldFont);
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  aboutWidget_->OpenFlipperAbout->append(tr("OpenGL Specific Info:"));
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(standardFont);
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  QString vendor = QString((const char*)glGetString(GL_VENDOR));
  aboutWidget_->OpenFlipperAbout->append(tr("Vendor:\t") + vendor);
  QString renderer = QString((const char*)glGetString(GL_RENDERER));
  aboutWidget_->OpenFlipperAbout->append(tr("Renderer:\t") + renderer);
  
  QGLFormat::OpenGLVersionFlags flags = QGLFormat::openGLVersionFlags();

  if ( flags.testFlag(QGLFormat::OpenGL_Version_3_0) )
    aboutWidget_->OpenFlipperAbout->append(tr("Version:\t3.0 or higher") );
  else if (flags.testFlag(QGLFormat::OpenGL_Version_2_1))
    aboutWidget_->OpenFlipperAbout->append(tr("Version:\t2.1 or higher" ));
  else if (flags.testFlag(QGLFormat::OpenGL_Version_2_0))
    aboutWidget_->OpenFlipperAbout->append(tr("Version:\t2.0 or higher" ));
  else if (flags.testFlag(QGLFormat::OpenGL_Version_1_5))
    aboutWidget_->OpenFlipperAbout->append(tr("Version:\t1.5 or higher" ));
  else if (flags.testFlag(QGLFormat::OpenGL_Version_1_4))
    aboutWidget_->OpenFlipperAbout->append(tr("Version:\t1.4 or higher" ));
  else if (flags.testFlag(QGLFormat::OpenGL_Version_1_3))
    aboutWidget_->OpenFlipperAbout->append(tr("Version:\t1.3 or higher" ));
  else if (flags.testFlag(QGLFormat::OpenGL_Version_1_2))
    aboutWidget_->OpenFlipperAbout->append(tr("Version:\t1.2 or higher" ));
  else if (flags.testFlag(QGLFormat::OpenGL_Version_1_1))
    aboutWidget_->OpenFlipperAbout->append(tr("Version:\t1.1 or higher" ));
  else
    aboutWidget_->OpenFlipperAbout->append(tr("Version:\tUNKNOWN!" ));



  // =====================================================================================
  // OpenGL Extensions
  // =====================================================================================
  aboutWidget_->OpenFlipperAbout->append(tr("Supported Extensions:"));
  QString glExtensions = QString((const char*)glGetString(GL_EXTENSIONS));
  aboutWidget_->OpenFlipperAbout->append(glExtensions);
  
  
  // =====================================================================================
  // glu Information
  // =====================================================================================
  aboutWidget_->OpenFlipperAbout->append("\n");
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(boldFont);
  aboutWidget_->OpenFlipperAbout->append(tr("Glu Specific Info:"));
  aboutWidget_->OpenFlipperAbout->setCurrentFont(standardFont);
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  QString gluVersion = QString((const char *)gluGetString(GLU_VERSION));
  aboutWidget_->OpenFlipperAbout->append(tr("GLU Version:\t") + gluVersion);
  
  aboutWidget_->OpenFlipperAbout->append(tr("Supported GLU Extensions:"));
  QString gluExtensions = QString((const char*)gluGetString(GLU_EXTENSIONS));
  aboutWidget_->OpenFlipperAbout->append(gluExtensions);
  
  
  aboutWidget_->OpenFlipperAbout->moveCursor(QTextCursor::Start);
  
  // =====================================================================================
  // glew Information
  // =====================================================================================
  aboutWidget_->OpenFlipperAbout->append("\n");
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(boldFont);
  aboutWidget_->OpenFlipperAbout->append(tr("GLEW Specific Info:"));
  aboutWidget_->OpenFlipperAbout->setCurrentFont(standardFont);
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  QString glewVersion = QString((const char *)glewGetString(GLEW_VERSION));
  aboutWidget_->OpenFlipperAbout->append(tr("GLEW Version:\t") + glewVersion);
  
  // =====================================================================================
  // Qt information
  // =====================================================================================
  
  aboutWidget_->OpenFlipperAbout->append("\n");
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(boldFont);
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  aboutWidget_->OpenFlipperAbout->append(tr("Qt Version Info:"));
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(standardFont);
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  aboutWidget_->OpenFlipperAbout->append(tr("Currently used Version:\t") + qVersion() );
  aboutWidget_->OpenFlipperAbout->append(tr("Link time Version:\t\t") + QT_VERSION_STR );
  
  // =====================================================================================
  // Compiler information
  // =====================================================================================    
  aboutWidget_->OpenFlipperAbout->append("\n");
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(boldFont);
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  aboutWidget_->OpenFlipperAbout->append(tr("Compiler Version Info:"));
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(standardFont);
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  aboutWidget_->OpenFlipperAbout->append( OpenFlipper::Options::compilerInfo() );
  
  // =====================================================================================
  // List the currently registered data types
  // =====================================================================================
  aboutWidget_->OpenFlipperAbout->append("\n");
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(boldFont);
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  aboutWidget_->OpenFlipperAbout->append(tr("Registered data types:"));
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  aboutWidget_->OpenFlipperAbout->setCurrentFont(standardFont);
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  QString types;

  // Iterate over all Types known to the core
  // Start at 1:
  // 0 type is defined as DATA_UNKNOWN
  DataType currentType = 1;
  for ( uint i = 0 ; i < typeCount() - 2  ; ++i) {
    types += typeName( currentType ) + "\t\t typeId: " + QString::number(currentType.value()) + "\n";
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    // Advance to next type ( Indices are bits so multiply by to to get next bit)
    currentType++;
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  }
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  aboutWidget_->OpenFlipperAbout->append( types );
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  aboutWidget_->show();

}
//=============================================================================