vtk-m/vtkm/rendering/BitmapFont.h

//=============================================================================
//
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt 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.
//
//  Copyright 2015 Sandia Corporation.
//  Copyright 2015 UT-Battelle, LLC.
//  Copyright 2015 Los Alamos National Security.
//
//  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
//  the U.S. Government retains certain rights in this software.
//  Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
//  Laboratory (LANL), the U.S. Government retains certain rights in
//  this software.
//
//=============================================================================
#ifndef vtk_m_BitmapFont_h
#define vtk_m_BitmapFont_h

#include <vtkm/rendering/vtkm_rendering_export.h>

#include <vtkm/Types.h>

#include <string>
#include <vector>

namespace vtkm {
namespace rendering {

class VTKM_RENDERING_EXPORT BitmapFont
{
public:
  struct Character
  {
    std::string id;
    char   c;
    int offx, offy;
    int x, y, w, h;
    int adv;
    int kern[256];
    Character()
    {
      ResetKerning();
    }
    Character(const std::string &id_, char c_, int offx_, int offy_,
              int x_, int y_, int w_, int h_, int adv_)
      : id(id_), c(c_), offx(offx_), offy(offy_),
        x(x_), y(y_), w(w_), h(h_), adv(adv_)
    {
      ResetKerning();
    }
    Character(const std::string &id_, const int metrics[])
      : id(id_), c((char)metrics[0]), offx(metrics[1]), offy(metrics[2]),
        x(metrics[3]), y(metrics[4]), w(metrics[5]), h(metrics[6]),
        adv(metrics[7])
    {
      ResetKerning();
    }
    void ResetKerning()
    {
      for (int i=0; i<256; i++)
      {
        kern[i]=0;
      }
    }
  };

  std::string Name;
  std::string ImageFile;
  int         Height;
  int         Ascender;
  int         Descender;
  int         ImgW, ImgH;
  int         PadL, PadR, PadT, PadB;
  int         ShortMap[256];
  std::vector<Character> Chars;

  std::vector<unsigned char> RawImageFileData;

public:
  BitmapFont();

  const Character &GetChar(char c) const;

  VTKM_CONT_EXPORT
  const std::vector<unsigned char> &GetRawImageData() const
  {
    return this->RawImageFileData;
  }

  vtkm::Float32 GetTextWidth(const std::string &text) const;

  void GetCharPolygon(char character, vtkm::Float32 &x, vtkm::Float32 &y,
                      vtkm::Float32 &vl, vtkm::Float32 &vr, vtkm::Float32 &vt, vtkm::Float32 &vb,
                      vtkm::Float32 &tl, vtkm::Float32 &tr, vtkm::Float32 &tt, vtkm::Float32 &tb,
                      char nextchar = 0) const;
};

}} //namespace vtkm::rendering

#endif