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/*=========================================================================
Program: Visualization Toolkit
Module: vtkXGPUInfoList.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkXGPUInfoList.h"
#include "vtkGPUInfoListArray.h"
#include "vtkObjectFactory.h"
#include <cassert>
#include <X11/Xlib.h> // Display structure, XOpenDisplay(), XScreenCount()
#include "vtkToolkits.h"
#ifdef VTK_USE_NVCONTROL
#include "NVCtrlLib.h" // needs NVCtrl.h (NV_CTRL_VIDEO_RAM, XNVCTRLQueryAttribute() )
#endif
vtkStandardNewMacro(vtkXGPUInfoList);
// ----------------------------------------------------------------------------
// Description:
// Build the list of vtkInfoGPU if not done yet.
// \post probed: IsProbed()
void vtkXGPUInfoList::Probe()
{
if(!this->Probed)
{
this->Probed=true;
this->Array=new vtkGPUInfoListArray;
bool found=false;
#ifdef VTK_USE_NVCONTROL
// see sample code in nvidia-settings-1.0/samples/nv-control-info.c
Display *dpy=XOpenDisplay(NULL); // we use the environment variable DISPLAY
if(dpy!=NULL)
{
int eventBase;
int errorBase;
if(XNVCTRLQueryExtension(dpy,&eventBase,&errorBase)==True)
{
int screenCount=XScreenCount(dpy);
int nvScreenCount=0;
int i=0;
while(i<screenCount)
{
if(XNVCTRLIsNvScreen(dpy,i))
{
++nvScreenCount;
}
++i;
}
found=nvScreenCount>0;
if(found)
{
this->Array->v.resize(nvScreenCount);
int j=0;
i=0;
while(i<screenCount)
{
if(XNVCTRLIsNvScreen(dpy,i))
{
int ramSize;
Bool status=XNVCTRLQueryAttribute(dpy,i,0,
NV_CTRL_VIDEO_RAM,&ramSize);
if(!status)
{
ramSize=0;
}
vtkGPUInfo *info=vtkGPUInfo::New();
info->SetDedicatedVideoMemory(static_cast<vtkTypeUInt64>(ramSize)*1024); // ramSize is in KiB
this->Array->v[j]=info;
++j;
}
++i;
}
}
}
XCloseDisplay(dpy);
}
#endif // #ifdef VTK_USE_NVCONTROL
if(!found)
{
this->Array->v.resize(0); // no GPU.
}
}
assert("post: probed" && this->IsProbed());
}
// ----------------------------------------------------------------------------
vtkXGPUInfoList::vtkXGPUInfoList()
{
}
// ----------------------------------------------------------------------------
vtkXGPUInfoList::~vtkXGPUInfoList()
{
}
// ----------------------------------------------------------------------------
void vtkXGPUInfoList::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}
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