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/*=========================================================================
Program: Visualization Toolkit
Module: vtkCoreGraphicsGPUInfoList.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 "vtkCoreGraphicsGPUInfoList.h"
#include "vtkGPUInfoListArray.h"
#include "vtkObjectFactory.h"
#include <cassert>
#include <OpenGL/OpenGL.h>
vtkStandardNewMacro(vtkCoreGraphicsGPUInfoList);
// ----------------------------------------------------------------------------
// Description:
// Build the list of vtkInfoGPU if not done yet.
// \post probed: IsProbed()
void vtkCoreGraphicsGPUInfoList::Probe()
{
if(!this->Probed)
{
this->Probed=true;
this->Array=new vtkGPUInfoListArray;
// Technique based on Apple QA1168
// <https://developer.apple.com/library/mac/qa/qa1168/_index.html>
// Get renderer info for all renderers that match the display mask.
// Using a -1/0xFFFFFFFF display mask enables us to find all renderers,
// including those GPUs that are not attached to monitors, aka. offline renderers.
GLint count = 0;
CGLRendererInfoObj infoObj = 0;
CGLError error = CGLQueryRendererInfo(0xFFFFFFFF, &infoObj, &count);
if ((error == kCGLNoError) && (count > 0))
{
for (GLint i = 0; i < count; i++)
{
GLint vramGL = 0;
vtkTypeUInt64 vramVTK = 0;
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
error = CGLDescribeRenderer(infoObj, i, kCGLRPVideoMemoryMegabytes, &vramGL);
vramVTK = static_cast<vtkTypeUInt64>(vramGL) * 1024 * 1024;
#else
error = CGLDescribeRenderer(infoObj, i, kCGLRPVideoMemory, &vramGL);
vramVTK = static_cast<vtkTypeUInt64>(vramGL);
#endif
// The software renderer will return a video memory of 0, so ignore it.
if ((error == kCGLNoError) && (vramVTK > 0))
{
vtkGPUInfo *info=vtkGPUInfo::New();
info->SetDedicatedVideoMemory(vramVTK);
this->Array->v.push_back(info);
}
}
}
else
{
this->Array->v.resize(0);
}
CGLDestroyRendererInfo(infoObj);
}
assert("post: probed" && this->IsProbed());
}
// ----------------------------------------------------------------------------
vtkCoreGraphicsGPUInfoList::vtkCoreGraphicsGPUInfoList()
{
}
// ----------------------------------------------------------------------------
vtkCoreGraphicsGPUInfoList::~vtkCoreGraphicsGPUInfoList()
{
}
// ----------------------------------------------------------------------------
void vtkCoreGraphicsGPUInfoList::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}
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