/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkOpenGLBillboardTextActor3D.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 "vtkOpenGLBillboardTextActor3D.h"

#include "vtkObjectFactory.h"
#include "vtkOpenGLGL2PSHelper.h"
#include "vtkRenderer.h"

#include <string>

vtkStandardNewMacro(vtkOpenGLBillboardTextActor3D)

//------------------------------------------------------------------------------
void vtkOpenGLBillboardTextActor3D::PrintSelf(std::ostream &os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
}

//------------------------------------------------------------------------------
int vtkOpenGLBillboardTextActor3D::
RenderTranslucentPolygonalGeometry(vtkViewport *vp)
{
  vtkOpenGLGL2PSHelper *gl2ps = vtkOpenGLGL2PSHelper::GetInstance();
  if (gl2ps)
  {
    switch (gl2ps->GetActiveState())
    {
      case vtkOpenGLGL2PSHelper::Capture: // Render to GL2PS
        return this->RenderGL2PS(vp, gl2ps);
      case vtkOpenGLGL2PSHelper::Background: // No rendering
        return 0;
      case vtkOpenGLGL2PSHelper::Inactive: // Superclass render
        break;
    }
  }

  return this->Superclass::RenderTranslucentPolygonalGeometry(vp);
}

//------------------------------------------------------------------------------
vtkOpenGLBillboardTextActor3D::vtkOpenGLBillboardTextActor3D()
{
}

//------------------------------------------------------------------------------
vtkOpenGLBillboardTextActor3D::~vtkOpenGLBillboardTextActor3D()
{
}

//------------------------------------------------------------------------------
int vtkOpenGLBillboardTextActor3D::RenderGL2PS(vtkViewport *viewport,
                                               vtkOpenGLGL2PSHelper *gl2ps)
{
  if (!this->InputIsValid() || !this->IsValid())
  {
    return 0;
  }

  vtkRenderer *ren = vtkRenderer::SafeDownCast(viewport);
  if (!ren)
  {
    vtkWarningMacro("Viewport is not a renderer?");
    return 0;
  }

  gl2ps->DrawString(this->Input, this->TextProperty, this->AnchorDC,
                    this->AnchorDC[2] + 1e-6, ren);

  return 1;
}