#if defined(_MSC_VER) && (_MSC_VER >= 1400)

#define _CRT_SECURE_NO_DEPRECATE 1

#pragma warning(disable : 4996)

#endif

//#include "texception.h"

//#include "tfilepath.h"

#include "tiio_tga.h"

#include "tpixel.h"

//#include <iostream.h></iostream.h>

inline unsigned short fgetUSHORT(FILE *chan) {

  int b0 = fgetc(chan);

  int b1 = fgetc(chan);

  return b1 << 8 | b0;

}

/*

inline unsigned short fgetULONG(FILE *chan)

{

  int a = fgetc(chan);

  int b = fgetc(chan);

  int c = fgetc(chan);

  int d = fgetc(chan);

  return a<<24|b<<16|c<<8|d;

}

*/

inline void fputUSHORT(unsigned short x, FILE *chan) {

  int b1 = x >> 8;

  int b0 = x & 0xFF;

  fputc(b0, chan);

  fputc(b1, chan);

}

/*

inline void fputULONG(unsigned long x, FILE *chan)

{

  int a = x>>24;

  int b = (x>>16)&0xff;

  int c = (x>>8)&0xff;

  int d = x&0xFF;

  fputc(a, chan);

  fputc(b, chan);

  fputc(c, chan);

  fputc(d, chan);

}

*/

typedef unsigned char UCHAR;

typedef unsigned short USHORT;

struct TgaHeader {

  UCHAR IdentificationField;

  UCHAR ColorMapType;

  UCHAR ImageTypeCode;

  USHORT ColorMapOrigin;

  USHORT ColorMapLength;

  UCHAR ColorMapSize;

  USHORT Ximage;

  USHORT Yimage;

  USHORT Width;

  USHORT Height;

  UCHAR ImagePixelSize;

  UCHAR ImageDescriptor;

};

//============================================================

static void readTgaHeader(TgaHeader &header, FILE *chan) {

  header.IdentificationField = fgetc(chan);

  header.ColorMapType        = fgetc(chan);

  header.ImageTypeCode       = fgetc(chan);

  header.ColorMapOrigin      = fgetUSHORT(chan);

  header.ColorMapLength      = fgetUSHORT(chan);

  header.ColorMapSize        = fgetc(chan);

  header.Ximage              = fgetUSHORT(chan);

  header.Yimage              = fgetUSHORT(chan);

  header.Width               = fgetUSHORT(chan);

  header.Height              = fgetUSHORT(chan);

  header.ImagePixelSize      = fgetc(chan);

  header.ImageDescriptor     = fgetc(chan);

}

//------------------------------------------------------------

static void writeTgaHeader(TgaHeader &header, FILE *chan) {

  fputc(header.IdentificationField, chan);

  fputc(header.ColorMapType, chan);

  fputc(header.ImageTypeCode, chan);

  fputUSHORT(header.ColorMapOrigin, chan);

  fputUSHORT(header.ColorMapLength, chan);

  fputc(header.ColorMapSize, chan);

  fputUSHORT(header.Ximage, chan);

  fputUSHORT(header.Yimage, chan);

  fputUSHORT(header.Width, chan);

  fputUSHORT(header.Height, chan);

  fputc(header.ImagePixelSize, chan);

  fputc(header.ImageDescriptor, chan);

}

//============================================================

class TgaReader final : public Tiio::Reader {

  FILE *m_chan;

  TgaHeader m_header;

  TPixel32 *m_palette;

  typedef void (TgaReader::*ReadLineProc)(char *buffer, int x0, int x1,

                                          int shrink);

  ReadLineProc m_readLineProc;

  typedef int (TgaReader::*SkipLineProc)(int count);

  SkipLineProc m_skipLineProc;

public:

  TgaReader()

      : m_chan(0)

      , m_readLineProc(&TgaReader::readNoLine)

      , m_skipLineProc(&TgaReader::skipLines0)

      , m_palette(0) {}

  ~TgaReader();

  void open(FILE *file) override;

  int skipLines0(int count) {

    int lineSize = m_info.m_lx;

    fseek(m_chan, count * lineSize, SEEK_CUR);

    return count;

  }

  int skipNoLines(int count) { return 0; };

  void skipBytes(int count) {

    // fseek(m_chan, count, SEEK_CUR); //inefficiente se count è piccolo

    for (int i = 0; i < count; i++) getc(m_chan);

  }

  int skipLines32(int count) {

    skipLines0(4 * count);

    return count;

  }

  int skipLines24(int count) {

    skipLines0(3 * count);

    return count;

  }

  int skipLines16(int count) {

    skipLines0(2 * count);

    return count;

  }

  inline TPixel32 fgetPixel32(FILE *chan) {

    TPixel32 pix;

    pix.b = fgetc(chan);

    pix.g = fgetc(chan);

    pix.r = fgetc(chan);

    pix.m = fgetc(chan);

    return pix;

  }

  inline TPixel32 fgetPixel24(FILE *chan) {

    TPixel32 pix;

    pix.b = fgetc(chan);

    pix.g = fgetc(chan);

    pix.r = fgetc(chan);

    pix.m = 255;

    return pix;

  }

  inline TPixel32 fgetPixel16(FILE *chan) {

    TPixel32 pix;

    unsigned short s = fgetUSHORT(chan);

    int b            = s & 0x1f;

    int g            = (s >> 5) & 0x1f;

    int r            = (s >> 10) & 0x1f;

    pix.r            = r << 3 | r >> 2;

    pix.g            = g << 3 | g >> 2;

    pix.b            = b << 3 | b >> 2;

    pix.m            = 255;

    return pix;

  }

  Tiio::RowOrder getRowOrder() const override {

    return ((m_header.ImageDescriptor >> 5) & 1) == 0 ? Tiio::BOTTOM2TOP

                                                      : Tiio::TOP2BOTTOM;

  }

  void readLine(char *buffer, int x0, int x1, int shrink) override {

    (this->*m_readLineProc)(buffer, x0, x1, shrink);

  }

  int skipLines(int count) override { return (this->*m_skipLineProc)(count); }

  void readPalette();

  void readNoLine(char *buffer, int x0, int x1, int shrink) {}

  void readLineRGB32(char *buffer, int x0, int x1, int shrink);

  void readLineRGB32rle(char *buffer, int x0, int x1, int shrink);

  void readLineRGB24(char *buffer, int x0, int x1, int shrink);

  void readLineRGB24rle(char *buffer, int x0, int x1, int shrink);

  void readLineRGB16(char *buffer, int x0, int x1, int shrink);

  void readLineRGB16rle(char *buffer, int x0, int x1, int shrink);

  void readLineGR8(char *buffer, int x0, int x1, int shrink);

  void readLineGR8rle(char *buffer, int x0, int x1, int shrink);

  void readLineCmapped(char *buffer, int x0, int x1, int shrink);

  void readLineCmappedRle(char *buffer, int x0, int x1, int shrink);

};

//------------------------------------------------------------

TgaReader::~TgaReader() { delete m_palette; }

//------------------------------------------------------------

void TgaReader::open(FILE *file) {

  {

    try {

      m_chan = file;

    } catch (...) {

      perror("uffa");

      return;

    }

    readTgaHeader(m_header, m_chan);

    m_info.m_lx = m_header.Width;

    m_info.m_ly = m_header.Height;

    if (m_header.IdentificationField > 0) {

      char tmp[256];

      fread(tmp, 1, m_header.IdentificationField, m_chan);

    }

    if (m_header.ColorMapType > 0) {

      readPalette();

    }

    Tiio::TgaWriterProperties *prop = new Tiio::TgaWriterProperties();

    m_info.m_properties             = prop;

    prop->m_compressed.setValue(false);

    switch (m_header.ImageTypeCode) {

    case 0:

      // cout << "NO IMAGE" << endl;

      break;

    case 1:

      // cout << "Uncompressed Cmapped; pixelsize=" << m_header.ImagePixelSize

      // << endl;

      m_readLineProc          = &TgaReader::readLineCmapped;

      m_info.m_samplePerPixel = 4;

      break;

    case 2:

      // cout << "Uncompressed RGB; pixelsize=" << m_header.ImagePixelSize <<

      // endl;

      m_info.m_samplePerPixel = 4;

      if (m_header.ImagePixelSize == 32) {

        m_readLineProc = &TgaReader::readLineRGB32;

        m_skipLineProc = &TgaReader::skipLines32;

      } else if (m_header.ImagePixelSize == 24) {

        m_info.m_samplePerPixel = 3;

        m_readLineProc          = &TgaReader::readLineRGB24;

        m_skipLineProc          = &TgaReader::skipLines24;

      } else if (m_header.ImagePixelSize == 16) {

        m_readLineProc = &TgaReader::readLineRGB16;

        m_skipLineProc = &TgaReader::skipLines16;

      }

      break;

    case 3:

      m_info.m_samplePerPixel = 1;

      m_readLineProc          = &TgaReader::readLineGR8;

      break;

    case 9:

      // cout << "Compressed Cmapped; pixelsize=" << m_header.ImagePixelSize <<

      // endl;

      prop->m_compressed.setValue(true);

      m_readLineProc          = &TgaReader::readLineCmappedRle;

      m_info.m_samplePerPixel = 4;

      break;

    case 10:

      // cout << "Compressed RGB; pixelsize=" << m_header.ImagePixelSize <<

      // endl;

      prop->m_compressed.setValue(true);

      m_info.m_samplePerPixel = 4;

      if (m_header.ImagePixelSize == 32) {

        m_readLineProc = &TgaReader::readLineRGB32rle;

        m_skipLineProc = &TgaReader::skipNoLines;

      } else if (m_header.ImagePixelSize == 24) {

        m_info.m_samplePerPixel = 3;

        m_readLineProc          = &TgaReader::readLineRGB24rle;

        m_skipLineProc          = &TgaReader::skipNoLines;

      } else if (m_header.ImagePixelSize == 16) {

        m_readLineProc = &TgaReader::readLineRGB16rle;

        m_skipLineProc = &TgaReader::skipNoLines;

      }

      break;

    case 11:

      m_info.m_samplePerPixel = 1;

      m_readLineProc          = &TgaReader::readLineGR8rle;

      break;

    default:;

      // cout << "***Unknown***" << endl;

    }

  }

}

//------------------------------------------------------------

void TgaReader::readPalette() {

  int colorCount  = m_header.ColorMapLength;

  int bitPerColor = m_header.ColorMapSize;

  // cout << "Reading palette: " << colorCount << " " << bitPerColor <<

  // "-entries" << endl;

  m_palette = new TPixel32[colorCount];

  int i;

  switch (bitPerColor) {

  case 16:

    for (i = 0; i < colorCount; i++) m_palette[i] = fgetPixel16(m_chan);

    break;

  case 24:

    for (i = 0; i < colorCount; i++) m_palette[i] = fgetPixel24(m_chan);

    break;

  case 32:

    for (i = 0; i < colorCount; i++) m_palette[i] = fgetPixel32(m_chan);

    break;

    break;

  }

}

//------------------------------------------------------------

void TgaReader::readLineRGB32(char *buffer, int x0, int x1, int shrink) {

  TPixel32 *pix = (TPixel32 *)buffer;

  pix += x0;

  if (x0 > 0) skipBytes(4 * x0);

  TPixel32 *endPix = pix + x1 - x0 + 1;

  while (pix < endPix) {

    *pix++ = fgetPixel32(m_chan);

    if (pix < endPix && shrink > 1) {

      pix += (shrink - 1);

      skipBytes(4 * (shrink - 1));

    }

  }

  if (m_info.m_lx - x1 - 1 > 0) skipBytes(4 * (m_info.m_lx - x1 - 1));

}

//------------------------------------------------------------

void TgaReader::readLineRGB24(char *buffer, int x0, int x1, int shrink) {

  TPixel32 *pix = (TPixel32 *)buffer;

  pix += x0;

  if (x0 > 0) skipBytes(3 * x0);

  TPixel32 *endPix = pix + x1 - x0 + 1;

  while (pix < endPix) {

    *pix++ = fgetPixel24(m_chan);

    if (pix < endPix && shrink > 1) {

      pix += (shrink - 1);

      skipBytes(3 * (shrink - 1));

    }

  }

  if (m_info.m_lx - x1 - 1 > 0) skipBytes(3 * (m_info.m_lx - x1 - 1));

}

//------------------------------------------------------------

void TgaReader::readLineRGB16(char *buffer, int x0, int x1, int shrink) {

  TPixel32 *pix = (TPixel32 *)buffer;

  pix += x0;

  if (x0 > 0) skipBytes(2 * x0);

  TPixel32 *endPix = pix + x1 - x0 + 1;

  while (pix < endPix) {

    *pix++ = fgetPixel16(m_chan);

    if (pix < endPix && shrink > 1) {

      pix += (shrink - 1);

      skipBytes(2 * (shrink - 1));

    }

  }

  if (m_info.m_lx - x1 - 1 > 0) skipBytes(2 * (m_info.m_lx - x1 - 1));

}

//------------------------------------------------------------

void TgaReader::readLineCmapped(char *buffer, int x0, int x1, int shrink) {

  TPixel32 *pix = (TPixel32 *)buffer;

  pix += x0;

  if (x0 > 0) skipBytes(x0);

  TPixel32 *endPix = pix + x1 - x0 + 1;

  while (pix < endPix) {

    int index = fgetc(m_chan);

    *pix++    = m_palette[index];

    if (pix < endPix && shrink > 1) {

      pix += (shrink - 1);

      skipBytes(shrink - 1);

    }

  }

  if (m_info.m_lx - x1 - 1 > 0) skipBytes(m_info.m_lx - x1 - 1);

}

//------------------------------------------------------------

void TgaReader::readLineRGB32rle(char *buffer, int x0, int x1, int shrink) {

  int x         = 0;

  TPixel32 *row = (TPixel32 *)buffer;

  while (x < m_info.m_lx) {

    UCHAR h   = fgetc(m_chan);

    int count = (h & 0x7F) + 1;

    if (h & 0x80) {

      TPixel32 pix = fgetPixel32(m_chan);

      for (int i = 0; i < count && x < m_info.m_lx; i++) row[x++] = pix;

    } else

      for (int i = 0; i < count && x < m_info.m_lx; i++)

        row[x++] = fgetPixel32(m_chan);

  }

}

//------------------------------------------------------------

void TgaReader::readLineRGB24rle(char *buffer, int x0, int x1, int shrink) {

  int x         = 0;

  TPixel32 *row = (TPixel32 *)buffer;

  while (x < m_info.m_lx) {

    UCHAR h   = fgetc(m_chan);

    int count = (h & 0x7F) + 1;

    if (h & 0x80) {

      TPixel32 pix = fgetPixel24(m_chan);

      for (int i = 0; i < count && x < m_info.m_lx; i++) row[x++] = pix;

    } else

      for (int i = 0; i < count && x < m_info.m_lx; i++)

        row[x++] = fgetPixel24(m_chan);

  }

}

//------------------------------------------------------------

void TgaReader::readLineRGB16rle(char *buffer, int x0, int x1, int shrink) {

  int x         = 0;

  TPixel32 *row = (TPixel32 *)buffer;

  while (x < m_info.m_lx) {

    UCHAR h   = fgetc(m_chan);

    int count = (h & 0x7F) + 1;

    if (h & 0x80) {

      TPixel32 pix = fgetPixel16(m_chan);

      for (int i = 0; i < count && x < m_info.m_lx; i++) row[x++] = pix;

    } else

      for (int i = 0; i < count && x < m_info.m_lx; i++)

        row[x++] = fgetPixel16(m_chan);

  }

}

//------------------------------------------------------------

void TgaReader::readLineGR8(char *buffer, int x0, int x1, int shrink) {

  TPixel32 *row = (TPixel32 *)buffer;

  int w         = x1 - x0 + 1;

  while (w--) {

    row->r = row->g = row->b = fgetc(m_chan);

    row->m                   = 0xff;

    ++row;

  }

}

//------------------------------------------------------------

void TgaReader::readLineGR8rle(char *buffer, int x0, int x1, int shrink) {

  TPixel32 *row = (TPixel32 *)buffer;

  UCHAR count, byte;

  int nx, x, i;

  int width = x1 - x0 + 1;

  for (nx = 0; nx < width;) {

    count = fgetc(m_chan);

    if ((count >> 7) & 0x01) {

      count -= 127;

      byte = fgetc(m_chan);

      for (x = 0; x < count; x++) {

        row->r = row->g = row->b = byte;

        row->m                   = 0xff;

        ++row;

        nx++;

      }

    } else {

      for (i = 0; i < count + 1; i++) {

        byte   = fgetc(m_chan);

        row->r = row->g = row->b = byte;

        row->m                   = 0xff;

        ++row;

        nx++;

      }

    }

  }

  if (nx != width) fprintf(stderr, "tga read error: decode failed\n");

}

//------------------------------------------------------------

void TgaReader::readLineCmappedRle(char *buffer, int x0, int x1, int shrink) {

  int x         = 0;

  TPixel32 *row = (TPixel32 *)buffer;

  while (x < m_info.m_lx) {

    UCHAR h   = fgetc(m_chan);

    int count = (h & 0x7F) + 1;

    if (h & 0x80) {

      int index    = fgetc(m_chan);

      TPixel32 pix = m_palette[index];

      for (int i = 0; i < count && x < m_info.m_lx; i++) row[x++] = pix;

    } else {

      for (int i = 0; i < count && x < m_info.m_lx; i++) {

        int index = fgetc(m_chan);

        row[x++]  = m_palette[index];

      }

    }

  }

}

//============================================================

Tiio::TgaWriterProperties::TgaWriterProperties()

    : m_pixelSize("Bits Per Pixel"), m_compressed("Compression", true) {

  m_pixelSize.addValue(L"16 bits");

  m_pixelSize.addValue(L"24 bits");

  m_pixelSize.addValue(L"32 bits");

  m_pixelSize.setValue(L"24 bits");

  bind(m_pixelSize);

  bind(m_compressed);

}

void Tiio::TgaWriterProperties::updateTranslation() {

  m_pixelSize.setQStringName(tr("Bits Per Pixel"));

  m_pixelSize.setItemUIName(L"16 bits", tr("16 bits"));

  m_pixelSize.setItemUIName(L"24 bits", tr("24 bits"));

  m_pixelSize.setItemUIName(L"32 bits", tr("32 bits"));

  m_compressed.setQStringName(tr("Compression"));

}

//============================================================

class TgaWriter final : public Tiio::Writer {

  FILE *m_chan;

  TgaHeader m_header;

  typedef void (TgaWriter::*WriteLineProc)(char *buffer);

  WriteLineProc m_writeLineProc;

public:

  TgaWriter() : m_chan(0), m_writeLineProc(&TgaWriter::writeNoLine) {}

  void open(FILE *file, const TImageInfo &info) override {

    m_info = info;

    try {

      m_chan = file;

    } catch (...) {

      perror("uffa");

      return;

    }

    if (!m_properties) m_properties = new Tiio::TgaWriterProperties();

    bool compressed =

        ((TBoolProperty *)(m_properties->getProperty("Compression")))

            ->getValue();

    memset(&m_header, 0, sizeof(m_header));

    m_header.ImageTypeCode = compressed ? 10 : 2;

    m_header.Width         = m_info.m_lx;

    m_header.Height        = m_info.m_ly;

    std::wstring pixelSizeW =

        ((TEnumProperty *)(m_properties->getProperty("Bits Per Pixel")))

            ->getValue()

            .substr(0, 2);

    if (pixelSizeW == L"16") {

      m_header.ImagePixelSize = 16;

      m_writeLineProc =

          compressed ? &TgaWriter::writeLine16rle : &TgaWriter::writeLine16;

    } else if (pixelSizeW == L"24") {

      m_header.ImagePixelSize = 24;

      m_writeLineProc =

          compressed ? &TgaWriter::writeLine24rle : &TgaWriter::writeLine24;

    } else {

      m_header.ImagePixelSize = 32;

      m_writeLineProc =

          compressed ? &TgaWriter::writeLine32rle : &TgaWriter::writeLine32;

    }

    writeTgaHeader(m_header, m_chan);

  }

  void flush() override { fflush(m_chan); }

  ~TgaWriter() { delete m_properties; }

  inline void fputPixel32(const TPixel32 &pix, FILE *chan) {

    fputc(pix.b, m_chan);

    fputc(pix.g, m_chan);

    fputc(pix.r, m_chan);

    fputc(pix.m, m_chan);

  }

  inline void fputPixel24(const TPixel32 &pix, FILE *chan) {

    fputc(pix.b, m_chan);

    fputc(pix.g, m_chan);

    fputc(pix.r, m_chan);

  }

  inline void fputPixel16(const TPixel32 &pix, FILE *chan) {

    unsigned short word;

    word = (pix.r >> 3) << 10 | (pix.g >> 3) << 5 | (pix.b >> 3);

    fputc(word & 0xFF, m_chan);

    fputc((word >> 8) & 0xFF, m_chan);

  }

  void writeNoLine(char *buffer) {}

  void writeLine16(char *buffer);

  void writeLine24(char *buffer);

  void writeLine32(char *buffer);

  void writeLine16rle(char *buffer);

  void writeLine24rle(char *buffer);

  void writeLine32rle(char *buffer);

  void writeLine(char *buffer) override { (this->*m_writeLineProc)(buffer); }

  // m_header.ImagePixelSize is set to "Bits Per Pixel" property value

  // in the function open()

  bool writeAlphaSupported() const override {

    return m_header.ImagePixelSize == 32;

  }

};

//------------------------------------------------------------

void TgaWriter::writeLine32rle(char *buffer) {

  int x         = 0;

  TPixel32 *row = (TPixel32 *)buffer;

  while (x < m_info.m_lx) {

    if (x + 1 < m_info.m_lx && row[x] == row[x + 1]) {

      int count = 2;

      int max   = std::min(128, m_info.m_lx - x);

      while (count < max && row[x + count - 1] == row[x + count]) count++;

      fputc((count - 1) | 0x80, m_chan);

      fputPixel32(row[x], m_chan);

      x += count;

    } else {

      int count = 1;

      int max   = std::min(128, m_info.m_lx - x);

      while (count < max && row[x + count - 1] != row[x + count]) count++;

      fputc(count - 1, m_chan);

      for (int i = 0; i < count; i++) fputPixel32(row[x++], m_chan);

    }

  }

}

//------------------------------------------------------------

void TgaWriter::writeLine24rle(char *buffer) {

  int x         = 0;

  TPixel32 *row = (TPixel32 *)buffer;

  while (x < m_info.m_lx) {

    if (x + 1 < m_info.m_lx && row[x] == row[x + 1]) {

      int count = 2;

      int max   = std::min(128, m_info.m_lx - x);

      while (count < max && row[x + count - 1] == row[x + count]) count++;

      fputc((count - 1) | 0x80, m_chan);

      fputPixel24(row[x], m_chan);

      x += count;

    } else {

      int count = 1;

      int max   = std::min(128, m_info.m_lx - x);

      while (count < max && row[x + count - 1] != row[x + count]) count++;

      fputc(count - 1, m_chan);

      for (int i = 0; i < count; i++) fputPixel24(row[x++], m_chan);

    }

  }

}

//------------------------------------------------------------

void TgaWriter::writeLine16rle(char *buffer) {

  int x         = 0;

  TPixel32 *row = (TPixel32 *)buffer;

  while (x < m_info.m_lx) {

    if (x + 1 < m_info.m_lx && row[x] == row[x + 1]) {

      int count = 2;

      int max   = std::min(128, m_info.m_lx - x);

      while (count < max && row[x + count - 1] == row[x + count]) count++;

      fputc((count - 1) | 0x80, m_chan);

      fputPixel16(row[x], m_chan);

      x += count;

    } else {

      int count = 1;

      int max   = std::min(128, m_info.m_lx - x);

      while (count < max && row[x + count - 1] != row[x + count]) count++;

      fputc(count - 1, m_chan);

      for (int i = 0; i < count; i++) fputPixel16(row[x++], m_chan);

    }

  }

}

//------------------------------------------------------------

void TgaWriter::writeLine32(char *buffer) {

  TPixel32 *pix    = (TPixel32 *)buffer;

  TPixel32 *endPix = pix + m_info.m_lx;

  while (pix < endPix) fputPixel32(*pix++, m_chan);

}

//------------------------------------------------------------

void TgaWriter::writeLine24(char *buffer) {

  TPixel32 *pix    = (TPixel32 *)buffer;

  TPixel32 *endPix = pix + m_info.m_lx;

  while (pix < endPix) fputPixel24(*pix++, m_chan);

}

//------------------------------------------------------------

void TgaWriter::writeLine16(char *buffer) {

  TPixel32 *pix    = (TPixel32 *)buffer;

  TPixel32 *endPix = pix + m_info.m_lx;

  while (pix < endPix) fputPixel16(*pix++, m_chan);

}

//============================================================

Tiio::Reader *Tiio::makeTgaReader() { return new TgaReader(); }

Tiio::Writer *Tiio::makeTgaWriter() { return new TgaWriter(); }