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

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

#include "vtkCellArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkPolyData.h"
#include "vtkUnsignedCharArray.h"

vtkStandardNewMacro(vtkTextSource);

#define vtkfont_width 9
#define vtkfont_row_width 864
#define vtkfont_height 15
static unsigned char vtkfont_bits[] = {
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0xe0,0x00,0x10,0x90,0x00,0x00,0x40,0x88,0x03,0x1c,0x10,0x08,0x00,
 0x00,0x00,0x00,0x00,0x00,0x20,0x1c,0x10,0xf8,0xf8,0x03,0xe2,0x0f,0x8f,0x3f,
 0x3e,0x7c,0x00,0x00,0x00,0x02,0x80,0x00,0x1f,0x3e,0x10,0xfc,0xf0,0xf1,0xe3,
 0xcf,0x1f,0x1f,0x41,0x7c,0xe0,0x09,0x12,0x20,0x48,0x10,0x1f,0x3f,0x7c,0xfc,
 0xf0,0xf1,0x27,0x48,0x90,0x20,0x41,0x82,0xfc,0xe1,0x11,0xc0,0x03,0x02,0x00,
 0x0e,0x00,0x04,0x00,0x00,0x04,0x00,0x0e,0x00,0x01,0x00,0x00,0x08,0xc0,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x80,0x83,0xe0,0x80,0x11,0xe0,0x00,0x10,0x90,0x90,0x80,0xa0,0x44,0x04,0x0c,
 0x08,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x22,0x18,0x04,0x01,0x02,0x23,
 0x80,0x00,0x20,0x41,0x82,0x00,0x00,0x00,0x01,0x00,0x81,0x20,0x41,0x28,0x08,
 0x09,0x22,0x44,0x80,0x80,0x20,0x41,0x10,0x80,0x08,0x11,0x20,0x48,0x90,0x20,
 0x41,0x82,0x04,0x09,0x82,0x20,0x48,0x90,0x20,0x41,0x82,0x00,0x21,0x20,0x00,
 0x02,0x05,0x00,0x0c,0x00,0x04,0x00,0x00,0x04,0x00,0x11,0x00,0x01,0x10,0x80,
 0x08,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x40,0x80,0x00,0x41,0x12,0xe0,0x00,0x10,0x90,0x90,0xe0,0xa3,
 0x44,0x04,0x02,0x08,0x10,0x00,0x40,0x00,0x00,0x00,0x00,0x10,0x41,0x14,0x04,
 0x01,0x81,0x22,0x40,0x00,0x20,0x41,0x82,0x00,0x00,0x80,0x00,0x00,0x82,0x20,
 0x41,0x44,0x08,0x09,0x20,0x44,0x80,0x80,0x00,0x41,0x10,0x80,0x88,0x10,0x60,
 0xcc,0x90,0x20,0x41,0x82,0x04,0x09,0x80,0x20,0x48,0x90,0x20,0x22,0x44,0x80,
 0x20,0x20,0x00,0x82,0x08,0x00,0x10,0x00,0x04,0x00,0x00,0x04,0x00,0x11,0x00,
 0x01,0x00,0x00,0x08,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x80,0x00,0x41,0x0c,0xe0,0x00,0x10,0x00,
 0xf8,0x91,0x40,0x42,0x04,0x00,0x04,0x20,0x88,0x40,0x00,0x00,0x00,0x00,0x08,
 0x41,0x10,0x00,0x81,0x40,0xa2,0x47,0x00,0x10,0x41,0x82,0x20,0x40,0x40,0x00,
 0x00,0x04,0x20,0x79,0x82,0x08,0x09,0x20,0x44,0x80,0x80,0x00,0x41,0x10,0x80,
 0x48,0x10,0xa0,0x4a,0x91,0x20,0x41,0x82,0x04,0x09,0x80,0x20,0x88,0x88,0x20,
 0x14,0x28,0x40,0x20,0x40,0x00,0x42,0x10,0x00,0x00,0x7c,0xf4,0xf0,0xe1,0xc5,
 0x07,0x01,0x2f,0x3d,0x18,0xe0,0x08,0x82,0xe0,0x46,0x0f,0x1f,0x3d,0xbc,0xe4,
 0xf0,0xf1,0x23,0x44,0x90,0x20,0x41,0x42,0xfc,0x81,0x80,0x80,0x00,0x00,0xe0,
 0x00,0x10,0x00,0x90,0x90,0x00,0x81,0x03,0x00,0x04,0x20,0x50,0x40,0x00,0x00,
 0x00,0x00,0x04,0x41,0x10,0x80,0xc0,0x21,0x62,0x48,0x0f,0x08,0x3e,0xc2,0x70,
 0xe0,0x20,0xe0,0x0f,0x08,0x10,0x45,0x82,0xf8,0x08,0x20,0xc4,0x83,0x87,0x00,
 0x7f,0x10,0x80,0x38,0x10,0xa0,0x4a,0x92,0x20,0x3f,0x82,0xfc,0xf0,0x81,0x20,
 0x88,0x88,0x24,0x08,0x10,0x20,0x20,0x80,0x00,0x02,0x00,0x00,0x00,0x80,0x0c,
 0x09,0x12,0x26,0x08,0x81,0x10,0x43,0x10,0x80,0x88,0x81,0x20,0xc9,0x90,0x20,
 0x43,0xc2,0x18,0x09,0x42,0x20,0x44,0x90,0x20,0x22,0x42,0x80,0x60,0x80,0x00,
 0x03,0x00,0xe0,0x00,0x10,0x00,0x90,0xe0,0x03,0x41,0x04,0x00,0x04,0x20,0xfc,
 0xf9,0x03,0xe0,0x0f,0x00,0x04,0x41,0x10,0x40,0x00,0x12,0x02,0xc8,0x10,0x04,
 0x41,0xbc,0x20,0x40,0x20,0x00,0x00,0x08,0x08,0x65,0x82,0x08,0x09,0x20,0x44,
 0x80,0x80,0x38,0x41,0x10,0x80,0x28,0x10,0x20,0x49,0x94,0x20,0x01,0x82,0x24,
 0x00,0x82,0x20,0x88,0x88,0x24,0x08,0x10,0x10,0x20,0x80,0x00,0x02,0x00,0x00,
 0x00,0x80,0x04,0x09,0x10,0x24,0xc8,0x87,0x10,0x41,0x10,0x80,0x68,0x80,0x20,
 0x49,0x90,0x20,0x41,0x82,0x08,0x09,0x40,0x20,0x84,0x88,0x24,0x14,0x42,0x40,
 0x60,0x80,0x00,0x03,0x00,0xe0,0x00,0x10,0x00,0xf8,0x81,0x84,0x44,0x14,0x00,
 0x04,0x20,0x50,0x40,0x00,0x00,0x00,0x00,0x02,0x41,0x10,0x30,0x00,0xf2,0x07,
 0x48,0x10,0x02,0x41,0x80,0x00,0x00,0x40,0x00,0x00,0x04,0x04,0x59,0xfe,0x08,
 0x09,0x20,0x44,0x80,0x80,0x20,0x41,0x10,0x80,0x48,0x10,0x20,0x49,0x98,0x20,
 0x01,0x82,0x44,0x00,0x82,0x20,0x08,0x85,0x24,0x14,0x10,0x08,0x20,0x00,0x01,
 0x02,0x00,0x00,0x00,0xfc,0x04,0x09,0x10,0xe4,0x0f,0x81,0x10,0x41,0x10,0x80,
 0x18,0x80,0x20,0x49,0x90,0x20,0x41,0x82,0x08,0xf0,0x41,0x20,0x84,0x88,0x24,
 0x08,0x42,0x20,0x80,0x80,0x80,0x00,0x00,0xe0,0x00,0x10,0x00,0x90,0x80,0x44,
 0x4a,0x08,0x00,0x08,0x10,0x88,0x40,0x00,0x00,0x00,0x00,0x01,0x41,0x10,0x08,
 0x00,0x02,0x02,0x48,0x10,0x02,0x41,0x80,0x00,0x00,0x80,0xe0,0x0f,0x02,0x04,
 0x01,0x82,0x08,0x09,0x20,0x44,0x80,0x80,0x20,0x41,0x10,0x80,0x88,0x10,0x20,
 0x48,0x90,0x20,0x01,0x92,0x84,0x00,0x82,0x20,0x08,0x85,0x24,0x22,0x10,0x04,
 0x20,0x00,0x02,0x02,0x00,0x00,0x00,0x82,0x04,0x09,0x10,0x24,0x00,0x01,0x0f,
 0x41,0x10,0x80,0x68,0x80,0x20,0x49,0x90,0x20,0x41,0x82,0x08,0x00,0x42,0x20,
 0x04,0x85,0x24,0x14,0x42,0x10,0x40,0x80,0x00,0x01,0x00,0xe0,0x00,0x00,0x00,
 0x90,0xe0,0x43,0x4a,0x0c,0x00,0x08,0x10,0x00,0x40,0xc0,0x01,0x00,0x02,0x01,
 0x22,0x10,0x04,0x08,0x02,0x22,0x48,0x10,0x01,0x41,0x40,0x20,0xe0,0x00,0x01,
 0x00,0x01,0x00,0x01,0x82,0x08,0x09,0x22,0x44,0x80,0x80,0x20,0x41,0x10,0x84,
 0x08,0x11,0x20,0x48,0x90,0x20,0x01,0xa2,0x04,0x09,0x82,0x20,0x08,0x85,0x2a,
 0x41,0x10,0x04,0x20,0x00,0x02,0x02,0x00,0x00,0x00,0xc2,0x0c,0x09,0x12,0x26,
 0x00,0x81,0x00,0x41,0x10,0x80,0x88,0x81,0x20,0x49,0x90,0x20,0x43,0xc2,0x08,
 0x08,0x42,0x24,0x04,0x85,0x2a,0x22,0x62,0x08,0x40,0x80,0x00,0x01,0x00,0xe0,
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 0x60,0x00,0x02,0x80,0x00,0x04,0x3e,0x82,0xfc,0xf0,0xf1,0xe3,0x8f,0x00,0x1f,
 0x41,0x7c,0x78,0x08,0xf2,0x27,0x48,0x10,0x1f,0x01,0x7c,0x04,0xf1,0x81,0xc0,
 0x07,0x02,0x11,0x41,0x10,0xfc,0xe1,0x01,0xc4,0x03,0x00,0x00,0x00,0xbc,0xf4,
 0xf0,0xe1,0xc5,0x07,0x01,0x1f,0x41,0x7c,0x84,0x08,0xe2,0x23,0x48,0x10,0x1f,
 0x3d,0xbc,0x08,0xf0,0x81,0xc3,0x0b,0x02,0x11,0x41,0x5c,0xfc,0x81,0x83,0xe0,
 0x00,0x00,0xe0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xc0,0x3f,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x20,0x00,0x00,0x84,0x00,0x00,0x00,
 0x00,0x00,0x00,0x01,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x00,
 0x00,0x00,0x00,0x00,0x00,0xe0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x20,0x00,0x00,0x84,
 0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x42,0x00,0x00,0x00,0x00,0x00,0x00,0xe0,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1f,
 0x00,0x00,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x80,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x3c,0x00,0x00,0x00,0x00,0x00,0x00,0xe0,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xe0
 };

// Construct object with no string set and backing enabled.
vtkTextSource::vtkTextSource()
{
  this->Text = NULL;
  this->Backing = 1;
  this->ForegroundColor[0] = 1.0;
  this->ForegroundColor[1] = 1.0;
  this->ForegroundColor[2] = 1.0;
  this->ForegroundColor[3] = 1.0;
  this->BackgroundColor[0] = 0.0;
  this->BackgroundColor[1] = 0.0;
  this->BackgroundColor[2] = 0.0;
  this->BackgroundColor[3] = 1.0;

  this->SetNumberOfInputPorts(0);
}

vtkTextSource::~vtkTextSource()
{
  if (this->Text)
    {
    delete [] this->Text;
    }
}

int vtkTextSource::RequestData(
  vtkInformation *vtkNotUsed(request),
  vtkInformationVector **vtkNotUsed(inputVector),
  vtkInformationVector *outputVector)
{
  // get the info object
  vtkInformation *outInfo = outputVector->GetInformationObject(0);

  // get the ouptut
  vtkPolyData *output = vtkPolyData::SafeDownCast(
    outInfo->Get(vtkDataObject::DATA_OBJECT()));

  int row, col;
  vtkPoints *newPoints; 
  vtkCellArray *newPolys;
  vtkUnsignedCharArray *newScalars;
  double x[3];
  int pos = 0;
  int pixelPos;
  vtkIdType pts[5];
  vtkIdType numPolys = 0;
  int acol;
  int drawingWhite = 0;
  int drawingBlack = 0;
  unsigned char white[4];
  unsigned char black[4];
  
  if (this->Text == NULL)
    {
    vtkErrorMacro (<< "Text is not set!");
    return 1;
    }

  // convert colors to unsigned char
  for (int i = 0; i < 4; i++)
    {
    white[i] = (unsigned char) (this->ForegroundColor[i] * 255.0);
    black[i] = (unsigned char) (this->BackgroundColor[i] * 255.0);
    }

  // Set things up; allocate memory
  x[2] = 0;

  newPoints = vtkPoints::New();
  newPolys = vtkCellArray::New();
  newScalars = vtkUnsignedCharArray::New();
  newScalars->SetNumberOfComponents(4);

  // Create Text
  while (this->Text[pos])
    {
    if (this->Text[pos] != 32)
      {
      for (col = 0; col < vtkfont_width; col++)
        {
        acol = (this->Text[pos] - 32)*vtkfont_width + col - 1;
        for (row = 0; row < vtkfont_height; row++)
          {
          pixelPos = acol + row*vtkfont_row_width;
          if (vtkfont_bits[pixelPos/8] & (0x01 << pixelPos%8))
            {
            if (drawingBlack)
              {
              x[0] = pos*vtkfont_width + col + 1; 
              x[1] = vtkfont_height - row;
              newPoints->InsertNextPoint(x);
              newScalars->InsertNextValue(black[0]);
              newScalars->InsertNextValue(black[1]);
              newScalars->InsertNextValue(black[2]);
              newScalars->InsertNextValue(black[3]);

              x[0] = pos*vtkfont_width + col; 
              x[1] = vtkfont_height - row;
              newPoints->InsertNextPoint(x);
              newScalars->InsertNextValue(black[0]);
              newScalars->InsertNextValue(black[1]);
              newScalars->InsertNextValue(black[2]);
              newScalars->InsertNextValue(black[3]);

              pts[0] = numPolys*4;
              pts[1] = numPolys*4 + 1;
              pts[2] = numPolys*4 + 2;
              pts[3] = numPolys*4 + 3;
              newPolys->InsertNextCell(4,pts);
              numPolys++;
              drawingBlack = 0;
              }
            if (!drawingWhite)
              {
              x[0] = pos*vtkfont_width + col; 
              x[1] = vtkfont_height - row;
              newPoints->InsertNextPoint(x);
              newScalars->InsertNextValue(white[0]);
              newScalars->InsertNextValue(white[1]);
              newScalars->InsertNextValue(white[2]);
              newScalars->InsertNextValue(white[3]);

              x[0] = pos*vtkfont_width + col + 1; 
              x[1] = vtkfont_height - row;
              newPoints->InsertNextPoint(x);
              newScalars->InsertNextValue(white[0]);
              newScalars->InsertNextValue(white[1]);
              newScalars->InsertNextValue(white[2]);
              newScalars->InsertNextValue(white[3]);
              drawingWhite = 1;
              }
            }
          // if the pixel is not set the close up the rectangle
          else
            {
            if (drawingWhite)
              {
              x[0] = pos*vtkfont_width + col + 1; 
              x[1] = vtkfont_height - row;
              newPoints->InsertNextPoint(x);
              newScalars->InsertNextValue(white[0]);
              newScalars->InsertNextValue(white[1]);
              newScalars->InsertNextValue(white[2]);
              newScalars->InsertNextValue(white[3]);

              x[0] = pos*vtkfont_width + col; 
              x[1] = vtkfont_height - row;
              newPoints->InsertNextPoint(x);
              newScalars->InsertNextValue(white[0]);
              newScalars->InsertNextValue(white[1]);
              newScalars->InsertNextValue(white[2]);
              newScalars->InsertNextValue(white[3]);

              pts[0] = numPolys*4;
              pts[1] = numPolys*4 + 1;
              pts[2] = numPolys*4 + 2;
              pts[3] = numPolys*4 + 3;
              newPolys->InsertNextCell(4,pts);
              numPolys++;
              drawingWhite = 0;
              }
            if (!drawingBlack && this->Backing)
              {
              x[0] = pos*vtkfont_width + col; 
              x[1] = vtkfont_height - row;
              newPoints->InsertNextPoint(x);
              newScalars->InsertNextValue(black[0]);
              newScalars->InsertNextValue(black[1]);
              newScalars->InsertNextValue(black[2]);
              newScalars->InsertNextValue(black[3]);

              x[0] = pos*vtkfont_width + col + 1; 
              x[1] = vtkfont_height - row;
              newPoints->InsertNextPoint(x);
              newScalars->InsertNextValue(black[0]);
              newScalars->InsertNextValue(black[1]);
              newScalars->InsertNextValue(black[2]);
              newScalars->InsertNextValue(black[3]);
              drawingBlack = 1;
              }
            }
          }
        // if we finished up a row but are still drawing close it up
        if (drawingWhite)
          {
          x[0] = pos*vtkfont_width + col + 1; 
          x[1] = 0;
          newPoints->InsertNextPoint(x);
          newScalars->InsertNextValue(white[0]);
          newScalars->InsertNextValue(white[1]);
          newScalars->InsertNextValue(white[2]);
          newScalars->InsertNextValue(white[3]);

          x[0] = pos*vtkfont_width + col; 
          x[1] = 0;
          newPoints->InsertNextPoint(x);
          newScalars->InsertNextValue(white[0]);
          newScalars->InsertNextValue(white[1]);
          newScalars->InsertNextValue(white[2]);
          newScalars->InsertNextValue(white[3]);
          
          pts[0] = numPolys*4;
          pts[1] = numPolys*4 + 1;
          pts[2] = numPolys*4 + 2;
          pts[3] = numPolys*4 + 3;
          newPolys->InsertNextCell(4,pts);
          numPolys++;
          drawingWhite = 0;
          }
        if (drawingBlack)
          {
          x[0] = pos*vtkfont_width + col + 1; 
          x[1] = 0;
          newPoints->InsertNextPoint(x);
          newScalars->InsertNextValue(black[0]);
          newScalars->InsertNextValue(black[1]);
          newScalars->InsertNextValue(black[2]);
          newScalars->InsertNextValue(black[3]);

          x[0] = pos*vtkfont_width + col; 
          x[1] = 0;
          newPoints->InsertNextPoint(x);
          newScalars->InsertNextValue(black[0]);
          newScalars->InsertNextValue(black[1]);
          newScalars->InsertNextValue(black[2]);
          newScalars->InsertNextValue(black[3]);
          
          pts[0] = numPolys*4;
          pts[1] = numPolys*4 + 1;
          pts[2] = numPolys*4 + 2;
          pts[3] = numPolys*4 + 3;
          newPolys->InsertNextCell(4,pts);
          numPolys++;
          drawingBlack = 0;
          }
        }
      }
    else
      {
      // draw a black square for a space
      if (this->Backing)
        {
        x[0] = pos*vtkfont_width; 
        x[1] = vtkfont_height;
        newPoints->InsertNextPoint(x);
        newScalars->InsertNextValue(black[0]);
        newScalars->InsertNextValue(black[1]);
        newScalars->InsertNextValue(black[2]);
        newScalars->InsertNextValue(black[3]);
      
        x[0] = pos*vtkfont_width + vtkfont_width; 
        x[1] = vtkfont_height;
        newPoints->InsertNextPoint(x);
        newScalars->InsertNextValue(black[0]);
        newScalars->InsertNextValue(black[1]);
        newScalars->InsertNextValue(black[2]);
        newScalars->InsertNextValue(black[3]);

        x[0] = pos*vtkfont_width + vtkfont_width; 
        x[1] = 0;
        newPoints->InsertNextPoint(x);
        newScalars->InsertNextValue(black[0]);
        newScalars->InsertNextValue(black[1]);
        newScalars->InsertNextValue(black[2]);
        newScalars->InsertNextValue(black[3]);
      
        x[0] = pos*vtkfont_width; 
        x[1] = 0;
        newPoints->InsertNextPoint(x);
        newScalars->InsertNextValue(black[0]);
        newScalars->InsertNextValue(black[1]);
        newScalars->InsertNextValue(black[2]);
        newScalars->InsertNextValue(black[3]);
      
        pts[0] = numPolys*4;
        pts[1] = numPolys*4 + 1;
        pts[2] = numPolys*4 + 2;
        pts[3] = numPolys*4 + 3;
        newPolys->InsertNextCell(4,pts);
        numPolys++;
        }
      }
    pos++;
    }
//
// Update ourselves and release memory
//
  output->SetPoints(newPoints);
  newPoints->Delete();

  output->GetPointData()->SetScalars(newScalars);
  newScalars->Delete();

  output->SetPolys(newPolys);
  newPolys->Delete();

  return 1;
}

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

  os << indent << "Text: " << (this->Text ? this->Text : "(none)") << "\n";
  os << indent << "Background Drawn: " << (this->Backing ? "On\n" : "Off\n");
  os << indent << "ForegroundColor: (" << this->ForegroundColor[0] << ", " 
     << this->ForegroundColor[1] << ", " << this->ForegroundColor[2]  << ")\n";
  os << indent << "BackgroundColor: (" << this->BackgroundColor[0] << ", " 
     << this->BackgroundColor[1] << ", " << this->BackgroundColor[2] << ")\n";
}