workspace/kcontrol/screensaver/kswidget.cpp

   1 #include <config-screensaver.h>
   2
   3 #include "testwin.h"
   4
   5 #include <QX11Info>
   6
   7 #ifdef HAVE_GLXCHOOSEVISUAL
   8 #include <GL/glx.h>
   9 #endif
  10
  11 KSWidget::KSWidget( QWidget* parent, Qt::WindowFlags wf )
  12     : QWidget( parent, wf ), colormap( None )
  13 {
  14 // use visual with support for double-buffering, for opengl
  15 // this code is (partially) duplicated in kdebase/workspace/krunner/lock/
  16 #ifdef HAVE_GLXCHOOSEVISUAL
  17     Visual* visual = CopyFromParent;
  18     int depth = CopyFromParent;
  19     XSetWindowAttributes attrs;
  20     int flags = parentWidget() ? 0 : CWOverrideRedirect;
  21     if( true /*mOpenGLVisual*/ )
  22     {
  23         static int attribs[][ 15 ] =
  24         {
  25         #define R GLX_RED_SIZE
  26         #define G GLX_GREEN_SIZE
  27         #define B GLX_BLUE_SIZE
  28             { GLX_RGBA, R, 8, G, 8, B, 8, GLX_DEPTH_SIZE, 8, GLX_DOUBLEBUFFER, GLX_STENCIL_SIZE, 1, None },
  29             { GLX_RGBA, R, 4, G, 4, B, 4, GLX_DEPTH_SIZE, 4, GLX_DOUBLEBUFFER, GLX_STENCIL_SIZE, 1, None },
  30             { GLX_RGBA, R, 8, G, 8, B, 8, GLX_DEPTH_SIZE, 8, GLX_DOUBLEBUFFER, None },
  31             { GLX_RGBA, R, 4, G, 4, B, 4, GLX_DEPTH_SIZE, 4, GLX_DOUBLEBUFFER, None },
  32             { GLX_RGBA, R, 8, G, 8, B, 8, GLX_DEPTH_SIZE, 8, GLX_STENCIL_SIZE, 1, None },
  33             { GLX_RGBA, R, 4, G, 4, B, 4, GLX_DEPTH_SIZE, 4, GLX_STENCIL_SIZE, 1, None },
  34             { GLX_RGBA, R, 8, G, 8, B, 8, GLX_DEPTH_SIZE, 8, None },
  35             { GLX_RGBA, R, 4, G, 4, B, 4, GLX_DEPTH_SIZE, 4, None },
  36             { GLX_RGBA, GLX_DEPTH_SIZE, 8, GLX_DOUBLEBUFFER, GLX_STENCIL_SIZE, 1, None },
  37             { GLX_RGBA, GLX_DEPTH_SIZE, 8, GLX_DOUBLEBUFFER, None },
  38             { GLX_RGBA, GLX_DEPTH_SIZE, 8, GLX_STENCIL_SIZE, 1, None },
  39             { GLX_RGBA, GLX_DEPTH_SIZE, 8, None }
  40         #undef R
  41         #undef G
  42         #undef B
  43         };
  44         for( unsigned int i = 0;
  45              i < sizeof( attribs ) / sizeof( attribs[ 0 ] );
  46              ++i )
  47         {
  48             if( XVisualInfo* info = glXChooseVisual( x11Info().display(), x11Info().screen(), attribs[ i ] ))
  49             {
  50                 visual = info->visual;
  51                 depth = info->depth;
  52                 colormap = XCreateColormap( x11Info().display(), RootWindow( x11Info().display(), x11Info().screen()), visual, AllocNone );
  53                 attrs.colormap = colormap;
  54                 flags |= CWColormap;
  55                 XFree( info );
  56                 break;
  57             }
  58         }
  59     }
  60     attrs.override_redirect = 1;
  61     Window w = XCreateWindow( x11Info().display(), RootWindow( x11Info().display(), x11Info().screen()),
  62         x(), y(), width(), height(), 0, depth, InputOutput, visual, flags, &attrs );
  63     if( parentWidget())
  64         XReparentWindow( x11Info().display(), w, parentWidget()->winId(), 0, 0 );
  65     create( w, false, true );
  66 #endif
  67 }
  68
  69 KSWidget::~KSWidget()
  70 {
  71 #ifdef HAVE_GLXCHOOSEVISUAL
  72     if( colormap != None )
  73         XFreeColormap( x11Info().display(), colormap );
  74 #endif
  75 }
  76
  77 #include "kswidget.moc"