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

  Program:   Visualization Toolkit
  Module:    vtkImageActor.cxx
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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

#include "vtkImageActor.h"
#include "vtkGraphicsFactory.h"
#include "vtkRenderer.h"

vtkImageActor* vtkImageActor::New()
{
  // First try to create the object from the vtkObjectFactory
  vtkObject* ret = vtkGraphicsFactory::CreateInstance("vtkImageActor");
  return (vtkImageActor*)ret;
}

vtkImageActor::vtkImageActor()
{
  this->Input = NULL;
  this->Interpolate = 1;
  this->DisplayExtent[0] = -1;
  this->DisplayExtent[1] = 0;
  this->DisplayExtent[2] = 0;
  this->DisplayExtent[3] = 0;
  this->DisplayExtent[4] = 0;
  this->DisplayExtent[5] = 0;  

  this->Bounds[0] = this->Bounds[2] = this->Bounds[4] = -1.0;
  this->Bounds[1] = this->Bounds[3] = this->Bounds[5] = 1.0;
}

vtkImageActor::~vtkImageActor()
{
  if (this->Input)
    {
    this->GetInput()->UnRegister(this);
    this->Input = NULL;
    }
}

int vtkImageActor::GetSliceNumber()
{
  // find the first axis with a one pixel extent and return
  // its value
  if (this->DisplayExtent[0] == this->DisplayExtent[1])
    {
    return this->DisplayExtent[0];
    }
  if (this->DisplayExtent[2] == this->DisplayExtent[3])
    {
    return this->DisplayExtent[2];
    }
  return this->DisplayExtent[4];
}

//----------------------------------------------------------------------------
void vtkImageActor::SetDisplayExtent(int extent[6])
{
  int idx, modified = 0;
  
  for (idx = 0; idx < 6; ++idx)
    {
    if (this->DisplayExtent[idx] != extent[idx])
      {
      this->DisplayExtent[idx] = extent[idx];
      modified = 1;
      }
    }

  if (modified)
    {
    this->Modified();
    }
}
//----------------------------------------------------------------------------
void vtkImageActor::SetDisplayExtent(int minX, int maxX, 
                                     int minY, int maxY,
                                     int minZ, int maxZ)
{
  int extent[6];
  
  extent[0] = minX;  extent[1] = maxX;
  extent[2] = minY;  extent[3] = maxY;
  extent[4] = minZ;  extent[5] = maxZ;
  this->SetDisplayExtent(extent);
}


//----------------------------------------------------------------------------
void vtkImageActor::GetDisplayExtent(int extent[6])
{
  int idx;
  
  for (idx = 0; idx < 6; ++idx)
    {
    extent[idx] = this->DisplayExtent[idx];
    }
}


// Renders an actor2D's property and then it's mapper.
int vtkImageActor::RenderOpaqueGeometry(vtkViewport* viewport)
{
  vtkDebugMacro(<< "vtkImageActor::RenderOpaqueGeometry");

  vtkImageData *input = this->GetInput();
  if (!input)
    {
    return 0;
    }
  // make sure the data is available
  input->UpdateInformation();

  // if the display extent has not been set, then compute one
  int *wExtent = input->GetWholeExtent();
  if (this->DisplayExtent[0] == -1)
    {
    this->DisplayExtent[0] = wExtent[0];
    this->DisplayExtent[1] = wExtent[1];
    this->DisplayExtent[2] = wExtent[2];
    this->DisplayExtent[3] = wExtent[3];
    this->DisplayExtent[4] = wExtent[4];
    this->DisplayExtent[5] = wExtent[4];
    }
  input->SetUpdateExtent(this->DisplayExtent);
  input->PropagateUpdateExtent();
  input->UpdateData();

  // render the texture map
  if ( input->GetScalarType() == VTK_UNSIGNED_CHAR )
    {
    this->Load(vtkRenderer::SafeDownCast(viewport));
    return 1;
    }
  else
    {
    vtkErrorMacro(<<"This filter requires unsigned char scalars as input");
    return 0;
    }
}

// Get the bounds for this Volume as (Xmin,Xmax,Ymin,Ymax,Zmin,Zmax).
float *vtkImageActor::GetBounds()
{
  if (!this->Input)
    {
    return this->Bounds;
    }
  this->Input->UpdateInformation();
  float *spacing = this->Input->GetSpacing();
  float *origin = this->Input->GetOrigin();

  // if the display extent has not been set, then compute one
  int *wExtent = this->Input->GetWholeExtent();
  if (this->DisplayExtent[0] == -1)
    {
    this->DisplayExtent[0] = wExtent[0];
    this->DisplayExtent[1] = wExtent[1];
    this->DisplayExtent[2] = wExtent[2];
    this->DisplayExtent[3] = wExtent[3];
    this->DisplayExtent[4] = wExtent[4];
    this->DisplayExtent[5] = wExtent[4];
    }
  this->Bounds[0] = this->DisplayExtent[0]*spacing[0] + origin[0];
  this->Bounds[1] = this->DisplayExtent[1]*spacing[0] + origin[0];
  this->Bounds[2] = this->DisplayExtent[2]*spacing[1] + origin[1];
  this->Bounds[3] = this->DisplayExtent[3]*spacing[1] + origin[1];
  this->Bounds[4] = this->DisplayExtent[4]*spacing[2] + origin[2];
  this->Bounds[5] = this->DisplayExtent[5]*spacing[2] + origin[2];
  
  return this->Bounds;
}

// Get the bounds for this Prop3D as (Xmin,Xmax,Ymin,Ymax,Zmin,Zmax).
void vtkImageActor::GetBounds(float bounds[6])
{
  this->GetBounds();
  for (int i=0; i<6; i++)
    {
    bounds[i] = this->Bounds[i];
    }
}

void vtkImageActor::PrintSelf(ostream& os, vtkIndent indent)
{
  this->vtkProp::PrintSelf(os, indent);

  os << indent << "Input: " << this->Input << "\n";
  os << indent << "Interpolate: " << (this->Interpolate ? "On\n" : "Off\n");

  int idx;  
  os << indent << "DisplayExtent: (" << this->DisplayExtent[0];
  for (idx = 1; idx < 6; ++idx)
    {
    os << ", " << this->DisplayExtent[idx];
    }
  os << ")\n";
}

//----------------------------------------------------------------------------
int vtkImageActor::GetWholeZMin()
{
  int *extent;
  
  if ( ! this->GetInput())
    {
    return 0;
    }
  this->GetInput()->UpdateInformation();
  extent = this->GetInput()->GetWholeExtent();
  return extent[4];
}

//----------------------------------------------------------------------------
int vtkImageActor::GetWholeZMax()
{
  int *extent;
  
  if ( ! this->GetInput())
    {
    return 0;
    }
  this->GetInput()->UpdateInformation();
  extent = this->GetInput()->GetWholeExtent();
  return extent[5];
}
