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/*=========================================================================
Program: Visualization Toolkit
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 "vtkOpenGLHelper.h"
#include "vtkOpenGLIndexBufferObject.h"
#include "vtkOpenGLRenderWindow.h"
#include "vtkOpenGLVertexArrayObject.h"
#include "vtkShaderProgram.h"
vtkOpenGLHelper::vtkOpenGLHelper()
{
this->Program = NULL;
this->IBO = vtkOpenGLIndexBufferObject::New();
this->VAO = vtkOpenGLVertexArrayObject::New();
}
vtkOpenGLHelper::~vtkOpenGLHelper()
{
this->IBO->Delete();
this->VAO->Delete();
}
void vtkOpenGLHelper::ReleaseGraphicsResources(vtkWindow * win)
{
vtkOpenGLRenderWindow *rwin =
vtkOpenGLRenderWindow::SafeDownCast(win);
if (rwin)
{
// Ensure that the context is current before releasing any
// graphics resources tied to it.
rwin->MakeCurrent();
}
if (this->Program)
{
// Let ShaderCache release the graphics resources as it is
// responsible for creation and deletion.
this->Program = 0;
}
this->IBO->ReleaseGraphicsResources();
this->VAO->ReleaseGraphicsResources();
}
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