#include "toonz/Naa2TlvConverter.h"

#include "toonz/tcenterlinevectorizer.h"

#include "toonz/stage.h"

#include "tpixelutils.h"

#include "tpalette.h"

#include <qset></qset>

#include <qtime></qtime>

#include <qdebug></qdebug>

#include <qmultimap></qmultimap>

QString RegionInfo::getTypeString() const {

  switch (type) {

  case RegionInfo::Background:

    return "Background";

  case RegionInfo::Ink:

    return "Ink";

  case RegionInfo::ThinInk:

    return "ThinInk";

  case RegionInfo::MainInk:

    return "Main ink";

  case RegionInfo::SyntheticInk:

    return "SyntheticInk";

  case RegionInfo::Paint:

    return "Paint";

  case RegionInfo::LargePaint:

    return "LargePaint";

  case RegionInfo::SmallPaint:

    return "SmallPaint";

  case RegionInfo::Unused:

    return "Unused";

  case RegionInfo::Unknown:

    return "Unknown";

  default:

    return "??????";

  }

}

Naa2TlvConverter::Naa2TlvConverter()

    : MaxColorCount(1000)

    , m_regionRas(0)

    , m_borderRas(0)

    , m_dotRas(0)

    , m_syntheticInkRas(0)

    , m_inkThickness(0)

    , m_palette(0)

    , m_valid(false)

{}

Naa2TlvConverter::~Naa2TlvConverter() {

  delete m_regionRas;

  delete m_borderRas;

  delete m_dotRas;

  delete m_syntheticInkRas;

  if (m_palette) m_palette->release();

}

void Naa2TlvConverter::setPalette(TPalette *palette) {

  if (m_palette != palette) {

    if (palette) palette->addRef();

    if (m_palette) m_palette->release();

    m_palette = palette;

  }

}

void Naa2TlvConverter::process(const TRaster32P &srcRas) {

  m_valid = false;

  setSourceImage(srcRas);

  if (!m_valid) return;

  separateRegions();

  computeLinks();

  findRegionBorders();

  erodeRegions();

  findLargePaints();

  findBackgroundRegions();

  findMainInks();

  // computeMainInkThickness();

  findThinInks();

  measureThickness();

  // findPaints();

  findPaints2();

  findThinPaints();

  findSuspectInks();

  addBorderInks();

}

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

// Input: srcRas (full color image)

// Output:

//   m_regionRas : pixel => region index

//   m_regions   : region index => RegionInfo

//

// Note: delete m_borderRas

void Naa2TlvConverter::setSourceImage(const TRaster32P &srcRas) {

  int lx = srcRas->getSize().lx;

  int ly = srcRas->getSize().ly;

  m_colors.clear();

  m_regions.clear();

  delete m_regionRas;

  m_regionRas = new WorkRaster<unsigned short="">(lx, ly);</unsigned>

  delete m_borderRas;

  m_borderRas = 0;

  delete m_dotRas;

  m_dotRas = 0;

  delete m_syntheticInkRas;

  m_syntheticInkRas = 0;

  QMap<tpixel32, int=""> colorTable;</tpixel32,>

  for (int y = 0; y < ly; y++) {

    TPixel32 *srcScanLine          = srcRas->pixels(y);

    unsigned short *regionScanLine = m_regionRas->pixels(y);

    for (int x = 0; x < lx; x++) {

      TPixel32 srcPix = overPixOnWhite(srcScanLine[x]);

      QMap<tpixel32, int="">::ConstIterator it = colorTable.find(srcPix);</tpixel32,>

      if (it == colorTable.end()) {

        // found new color (and therefore new region)

        RegionInfo r;

        // add new color

        r.colorIndex = m_colors.count();

        m_colors.append(srcPix);

        r.pixelCount = 1;

        // add new region

        int regionIndex = m_regions.count();

        m_regions.append(r);

        // update raster and colorTable

        regionScanLine[x] = regionIndex;

        colorTable.insert(srcPix, regionIndex);

        if (m_colors.count() > MaxColorCount) {

          return;

        }

      } else {

        // already defined color

        int regionIndex   = it.value();

        regionScanLine[x] = regionIndex;

        m_regions[regionIndex].pixelCount++;

      }

    }

  }

  m_valid = true;

}

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

// color-based regions => connection-based regions  (i.e. split unconnected

// region parts)

// note: rebuild m_regions

void Naa2TlvConverter::separateRegions() {

  if (!m_regionRas) return;

  const int lx   = m_regionRas->getLx();

  const int ly   = m_regionRas->getLy();

  const int wrap = lx;

  // we assume that m_regions contains almost no information (except:

  // m_regions[i].colorIndex == i)

  m_regions.clear();

  WorkRaster<int> wb(lx, ly);  // work buffer</int>

  QVector<int> regionMap;  // wb pixels => region indices</int>

  QList<int> freeRegions;</int>

  for (int y = 0; y < ly; y++) {

    unsigned short *waScanLine = m_regionRas->pixels(y);

    int *wbScanLine            = wb.pixels(y);

    for (int x = 0; x < lx; x++) {

      int c       = waScanLine[x];

      int cUp     = y > 0 ? waScanLine[x - wrap] : -1;

      int cLeft   = x > 0 ? waScanLine[x - 1] : -1;

      int cUpLeft = x > 0 && y > 0 ? waScanLine[x - wrap - 1] : -1;

      if (c != cUp && c != cLeft && c != cUpLeft) {

        // no connection: create a new region

        Q_ASSERT(0 <= c && c < m_colors.count());

        RegionInfo region;

        region.colorIndex = c;

        int regionIndex;

        if (!freeRegions.empty()) {

          // use a previously discarded region

          regionIndex = freeRegions.back();

          freeRegions.pop_back();

          m_regions[regionIndex] = region;

        } else {

          // create a new region

          regionIndex = m_regions.count();

          m_regions.append(region);

        }

        wbScanLine[x] = regionMap.count();

        regionMap.append(regionIndex);

      } else {

        // at least one connection

        if (c == cUpLeft)

          wbScanLine[x] = wbScanLine[x - wrap - 1];

        else if (c == cUp)

          wbScanLine[x] = wbScanLine[x - wrap];

        else {

          Q_ASSERT(c == cLeft);

          wbScanLine[x] = wbScanLine[x - 1];

        }

      }

      // merge if needed

      if (cUp == cLeft && cUp >= 0 &&

          regionMap[wbScanLine[x - 1]] != regionMap[wbScanLine[x - wrap]]) {

        // merge

        int pixelToDiscard = wbScanLine[x - 1];

        int pixelToKeep    = wbScanLine[x - wrap];

        Q_ASSERT(pixelToDiscard != pixelToKeep);

        int regionToDiscard = regionMap[pixelToDiscard];

        int regionToKeep    = regionMap[pixelToKeep];

        Q_ASSERT(regionToDiscard != regionToKeep);

        Q_ASSERT(m_regions[regionToDiscard].type != RegionInfo::Unused);

        Q_ASSERT(m_regions[regionToKeep].type != RegionInfo::Unused);

        for (int i = 0; i < regionMap.count(); i++)

          if (regionMap[i] == regionToDiscard) regionMap[i] = regionToKeep;

        // wbScanLine[x] = pixelToKeep;

        m_regions[regionToDiscard].type = RegionInfo::Unused;

        freeRegions.append(regionToDiscard);

      }

    }

  }

  // fill gaps

  for (;;) {

    // just remove topmost Unused regions

    if (!m_regions.empty() && m_regions.back().type == RegionInfo::Unused) {

      m_regions.pop_back();

      int k = m_regions.count();

      freeRegions.removeAll(k);

    } else if (!freeRegions.empty()) {

      // last region is used, but there is at least a free region with lower

      // index: move it there

      int regionToDiscard = m_regions.count() - 1;

      int regionToKeep    = freeRegions.back();

      freeRegions.pop_back();

      Q_ASSERT(m_regions[regionToKeep].type == RegionInfo::Unused);

      Q_ASSERT(m_regions[regionToDiscard].type != RegionInfo::Unused);

      Q_ASSERT(regionToKeep < regionToDiscard);

      m_regions[regionToKeep] = m_regions[regionToDiscard];

      // pop the region to discard

      m_regions.pop_back();

      // update map

      for (int i = 0; i < regionMap.count(); i++)

        if (regionMap[i] == regionToDiscard) regionMap[i] = regionToKeep;

    } else

      break;

  }

  Q_ASSERT(freeRegions.empty());

  for (int i = 0; i < m_regions.count(); i++) m_regions[i].pixelCount = 0;

  // wb => m_regionRas

  for (int y = 0; y < ly; y++) {

    unsigned short *regionScanLine = m_regionRas->pixels(y);

    int *wbScanLine                = wb.pixels(y);

    for (int x = 0; x < lx; x++) {

      int regionIndex   = regionMap[wbScanLine[x]];

      regionScanLine[x] = (unsigned short)regionIndex;

      m_regions[regionIndex].pixelCount++;

    }

  }

}

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

// compute adjacency relationships

// update: m_regions[].links

// outer regions are connected to the "pseudo-region" -1

// note: check orthogonal directions only

// compute region.perimeter

void Naa2TlvConverter::computeLinks() {

  if (!m_regionRas || m_regions.empty()) return;

  const int lx   = m_regionRas->getLx();

  const int ly   = m_regionRas->getLy();

  const int wrap = lx;

  unsigned short *waScanLine;

  int x;

  for (int i = 0; i < m_regions.count(); i++) m_regions[i].perimeter = 0;

  for (int y = 0; y < ly; y++) {

    waScanLine = m_regionRas->pixels(y);

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

      int c     = waScanLine[x];

      int cUp   = y > 0 ? waScanLine[x - wrap] : -1;

      int cLeft = x > 0 ? waScanLine[x - 1] : -1;

      if (c != cUp) {

        m_regions[c].touchRegion(cUp);

        m_regions[c].perimeter++;

        if (cUp >= 0) {

          m_regions[cUp].touchRegion(c);

          m_regions[cUp].perimeter++;

        }

      }

      if (c != cLeft) {

        m_regions[c].touchRegion(cLeft);

        m_regions[c].perimeter++;

        if (cLeft >= 0) {

          m_regions[cLeft].touchRegion(c);

          m_regions[cLeft].perimeter++;

        }

      }

    }

    m_regions[waScanLine[lx - 1]].touchRegion(-1);

  }

  waScanLine = m_regionRas->pixels(ly - 1);

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

    m_regions[waScanLine[x]].touchRegion(-1);

  }

}

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

// find background regions : (almost) white

//

void Naa2TlvConverter::findBackgroundRegions() {

  if (!m_regionRas || m_regions.empty()) return;

  int lx = m_regionRas->getLx();

  int ly = m_regionRas->getLy();

  // find the whitest color

  int bgColorIndex = -1;

  int maxV         = 0;

  for (int i = 0; i < m_colors.count(); i++) {

    TPixel color = m_colors.at(i);

    int v        = color.r + color.g + color.b;

    int a        = std::min({color.r, color.g, color.b});

    if (a < 230) continue;

    if (v > maxV) {

      bgColorIndex = i;

      maxV         = v;

    }

  }

  if (bgColorIndex < 0) {

    // no white found. no bg region

    return;

  }

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion                                 = m_regions[i];

    if (region.colorIndex == bgColorIndex) region.type = RegionInfo::Background;

  }

}

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

// start computing m_borderRas : 1 for boundary pixels, 0 for internal pixels

void Naa2TlvConverter::findRegionBorders() {

  if (!m_regionRas) return;

  int lx = m_regionRas->getLx();

  int ly = m_regionRas->getLy();

  delete m_borderRas;

  m_borderRas = new WorkRaster<unsigned char="">(lx, ly);</unsigned>

  static const int dd[][2] = {{-1, -1}, {0, -1}, {1, -1}, {-1, 0},

                              {1, 0},   {-1, 1}, {0, 1},  {1, 1}};

  // find region-region boundaries

  for (int y = 0; y < ly; y++) {

    unsigned short *workScanLine  = m_regionRas->pixels(y);

    unsigned char *borderScanLine = m_borderRas->pixels(y);

    for (int x = 0; x < lx; x++) {

      int k = workScanLine[x];

      Q_ASSERT(0 <= k && k < m_regions.count());

      int isBoundary = 0;

      for (int j = 0; j < 8; j++) {

        int x1 = x + dd[j][0], y1 = y + dd[j][1];

        if (0 <= x1 && x1 < lx && 0 <= y1 && y1 < ly) {

          int k1 = m_regionRas->pixels(y1)[x1];

          if (k1 != k) {

            isBoundary = 1;

            break;

          }

        }

      }

      borderScanLine[x] = isBoundary;

    }

  }

}

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

// update m_borders, adding 2,3... for internal pixels close to boundary

// update m_regions[i].boundaries (histogram : boundaries[k] is the number of

// pixels belonging to that region with m_border[pix] == k)

void Naa2TlvConverter::erodeRegions() {

  QTime clock;

  clock.start();

  if (!m_regionRas || !m_borderRas) return;

  int lx = m_regionRas->getLx();

  int ly = m_regionRas->getLy();

  static const int dd[][2] = {{-1, -1}, {0, -1}, {1, -1}, {-1, 0},

                              {1, 0},   {-1, 1}, {0, 1},  {1, 1}};

  for (int iter = 0; iter < 10; iter++) {

    for (int y = 0; y < ly; y++) {

      unsigned short *workScanLine  = m_regionRas->pixels(y);

      unsigned char *borderScanLine = m_borderRas->pixels(y);

      for (int x = 0; x < lx; x++) {

        if (borderScanLine[x] != iter + 1) continue;

        int c = workScanLine[x];

        for (int j = 0; j < 8; j++) {

          int x1 = x + dd[j][0], y1 = y + dd[j][1];

          if (!(0 <= x1 && x1 < lx && 0 <= y1 && y1 < ly)) continue;

          int c1 = m_regionRas->pixels(y1)[x1];

          int b1 = m_borderRas->pixels(y1)[x1];

          if (c1 == c && b1 == 0) m_borderRas->pixels(y1)[x1] = iter + 2;

        }

      }

    }

  }

  for (int i = 0; i < m_regions.count(); i++) m_regions[i].boundaries.clear();

  for (int y = 0; y < ly; y++) {

    unsigned short *workScanLine  = m_regionRas->pixels(y);

    unsigned char *borderScanLine = m_borderRas->pixels(y);

    for (int x = 0; x < lx; x++) {

      int c          = workScanLine[x];

      int b          = borderScanLine[x];

      RegionInfo &r  = m_regions[c];

      QList<int> &bs = r.boundaries;</int>

      while (bs.count() <= b) bs.append(0);

      bs[b]++;

      if (b == bs.count() - 1) r.pos = QPoint(x, y);

      if (r.x0 > r.x1) {

        r.x0 = r.x1 = x;

        r.y0 = r.y1 = y;

      } else {

        if (x < r.x0)

          r.x0 = x;

        else if (x > r.x1)

          r.x1 = x;

        if (y < r.y0)

          r.y0 = y;

        else if (y > r.y1)

          r.y1 = y;

      }

    }

  }

  qDebug() << "Erode regions. time = " << clock.elapsed();

}

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

// main inks touch background regions and don't have large interior

void Naa2TlvConverter::findMainInks() {

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (region.type != RegionInfo::Unknown) continue;

    if (region.isBackground() || region.type == RegionInfo::LargePaint ||

        region.boundaries[0] > 0)

      continue;

    double ap2 =

        100000.0 * (double)region.pixelCount / pow((double)region.perimeter, 2);

    if (ap2 > 100) continue;

    for (int c : region.links.keys()) {

      if (c >= 0 && (m_regions[c].isBackground() ||

                     m_regions[c].type == RegionInfo::LargePaint)) {

        int strength = region.links[c];

        if (strength > 50) {

          m_regions[i].type = RegionInfo::MainInk;

          break;

        }

      }

    }

  }

}

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

// compute the average thickness of the main ink region

void Naa2TlvConverter::computeMainInkThickness() {

  m_inkThickness  = 0.0;

  int largestArea = 0;

  for (int i = 0; i < m_regions.count(); i++) {

    if (m_regions[i].type != RegionInfo::MainInk) continue;

    if (m_regions[i].pixelCount < largestArea) continue;

    largestArea = m_regions[i].pixelCount;

    if (i == 55) {

      int x = 123;

    }

    QList<int> &bs = m_regions[i].boundaries;</int>

    Q_ASSERT(bs[1] > 0);

    int perimeter = m_regions[i].perimeter;

    int area      = bs[1];

    for (int j = 2; j < bs.count() && bs[j] * 2 > bs[1]; j++) area += bs[j];

    if (perimeter > 0) {

      m_inkThickness = 2 * (double)area / (double)perimeter;

    }

  }

}

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

void Naa2TlvConverter::findLargePaints() {

  if (!m_regionRas || !m_borderRas || m_regions.empty()) return;

  QSet<int> largePaintColors;</int>

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (region.type != RegionInfo::Unknown) continue;

    QList<int> &bs = region.boundaries;</int>

    if (bs[0] > 0) {

      region.type = RegionInfo::LargePaint;

      largePaintColors.insert(region.colorIndex);

    }

  }

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (region.type != RegionInfo::Unknown) continue;

    if (largePaintColors.contains(region.colorIndex))

      region.type = RegionInfo::LargePaint;

  }

}

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

void Naa2TlvConverter::findThinInks() {

  if (!m_regionRas || !m_borderRas || m_regions.empty()) return;

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (region.type != RegionInfo::Unknown) continue;

    QList<int> &bs = region.boundaries;</int>

    if (bs.count() == 2)

      region.type = RegionInfo::ThinInk;

    else if (bs.count() == 3) {

      continue;

      if (bs[2] * 5 < bs[1]) region.type = RegionInfo::ThinInk;

    } else {

      continue;

      int k = 1;

      int s = 0;

      while (k < bs.count() && s * 100 < region.pixelCount * 90) s += bs[k++];

      if (region.pixelCount > 100 && k <= 3)

        region.type = RegionInfo::ThinInk;  // era Ink per qualche ragione

    }

  }

}

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

void Naa2TlvConverter::findPaints() {

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (region.type != RegionInfo::Unknown) continue;

    for (int c : m_regions[i].links.keys()) {

      if (c >= 0 && m_regions[c].isInk()) {

        m_regions[i].type = RegionInfo::Paint;

        break;

      }

    }

  }

}

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

void Naa2TlvConverter::findPaints2() {

  double avThickness = 0.0;

  int m              = 0;

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (region.type == RegionInfo::MainInk) {

      avThickness += region.thickness * region.pixelCount;

      m += region.pixelCount;

    }

  }

  if (m > 0) {

    avThickness = avThickness / m;

  } else {

    avThickness = 1.5;  // this should never happen

  }

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (region.type != RegionInfo::Unknown) continue;

    if (region.thickness > 0.0) {

      if (region.thickness < 1.2 * avThickness)

        region.type = RegionInfo::Ink;

      else

        region.type = RegionInfo::Paint;

    }

  }

}

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

void Naa2TlvConverter::findThinPaints() {

  int lx = m_regionRas->getLx();

  int ly = m_regionRas->getLy();

  QList<int> regions;</int>

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (!region.isInk()) continue;

    if (region.type == RegionInfo::MainInk) continue;

    int inkBoundary = 0;

    QMap<int, int="">::ConstIterator it;</int,>

    for (it = region.links.begin(); it != region.links.end(); ++it) {

      int c            = it.key();

      int linkStrength = it.value();  // number of contact points

      if (c >= 0 && m_regions[c].isInk()) inkBoundary += linkStrength;

    }

    region.inkBoundary = inkBoundary;

    if (inkBoundary * 100 > region.perimeter * 80) regions.append(i);

  }

  for (int c : regions)

    m_regions[c].type = RegionInfo::SmallPaint;

}

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

void Naa2TlvConverter::findSuspectInks() {

  QMultiMap<tuint32, int=""> paintColorTable;</tuint32,>

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (0 == (region.type & RegionInfo::Paint)) continue;

    TPixel32 color = m_colors[region.colorIndex];

    if (color == TPixel32(0, 0, 0)) {

      int x = 1234;

      continue;

    }

    TUINT32 rawColor = *(TUINT32 *)&color;

    paintColorTable.insert(rawColor, i);

  }

  int count = 0;

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (region.isInk() && region.links.size() == 2) {

      int ra = region.links.keys().at(0), rb = region.links.keys().at(1);

      if (ra >= 0 && rb >= 0) {

        if (!m_regions[ra].isInk()) qSwap(ra, rb);

        if (m_regions[ra].isInk() && !m_regions[rb].isInk()) {

          int sa = region.links[ra];

          int sb = region.links[rb];

          if (sa > sb) {

            region.type = RegionInfo::Paint;

            count++;

            continue;

          }

        }

      }

    }

    if (region.type != RegionInfo::ThinInk) continue;

    TUINT32 rawColor = *(TUINT32 *)&m_colors[region.colorIndex];

    if (paintColorTable.contains(rawColor)) {

      region.type = RegionInfo::Unknown;

      count++;

    }

  }

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (region.isInk() && 10 <= region.pixelCount && region.pixelCount < 100) {

      int lx = region.x1 - region.x0 + 1;

      int ly = region.y1 - region.y0 + 1;

      int d  = std::max(lx, ly);

      if (std::min(lx, ly) * 2 > std::max(lx, ly) && region.pixelCount > d * d / 2) {

        region.type = RegionInfo::Paint;

      }

    }

    if (region.type == RegionInfo::Paint ||

        region.type == RegionInfo::Unknown) {

      bool isInk = false;

      if (region.boundaries.at(0) == 0) {

        if (region.boundaries.count() == 2)

          isInk = true;

        else if (region.boundaries.count() == 3) {

          int b1                 = region.boundaries.at(1);

          int b2                 = region.boundaries.at(2);

          if (b1 * 2 < b2) isInk = true;

        }

      }

      if (isInk) region.type = RegionInfo::Ink;

    }

  }

}

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

//

void Naa2TlvConverter::assignColorTypes() {

  if (!m_regionRas || !m_borderRas || m_regions.empty()) return;

  int lx = m_regionRas->getLx();

  int ly = m_regionRas->getLy();

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    if (region.type != RegionInfo::Unknown) continue;

    QList<int> &bs = region.boundaries;</int>

    if (bs[0] > 0) {

      region.type = RegionInfo::LargePaint;

    } else {

      int b = 0;

      for (int j = 1; j <= 2 && j < bs.count(); j++) b += bs[j];

      if (region.pixelCount > 200 &&

          (region.pixelCount - b) * 10 < region.pixelCount) {

        region.type = RegionInfo::ThinInk;

      }

    }

  }

}

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

void Naa2TlvConverter::addBorderInks()  // add synthetic inks: lines between two

                                        // adjacent fill-regions

{

  int lx                   = m_regionRas->getLx();

  int ly                   = m_regionRas->getLy();

  static const int dd[][2] = {{0, -1}, {-1, 0},  {1, 0},  {0, 1},

                              {1, 1},  {-1, -1}, {-1, 1}, {1, -1}};

  m_syntheticInkRas = new WorkRaster<unsigned char="">(lx, ly);</unsigned>

  for (int i = 0; i < lx * ly; i++) m_syntheticInkRas->pixels(0)[i] = 0;

  // calculate brightness of all colors in order to decide the region on which

  // the border to be added

  QList<int> colorsBrightness;</int>

  QVector<tpixel32>::iterator c;</tpixel32>

  for (c = m_colors.begin(); c != m_colors.end(); ++c)

    colorsBrightness.append((int)(*c).r * 30 + (int)(*c).g * 59 +

                            (int)(*c).b * 11);

  int borderInkColorIndex = m_colors.count();

  m_colors.append(TPixel32(255, 0, 0));

  RegionInfo borderInkRegion;

  borderInkRegion.type       = RegionInfo::SyntheticInk;

  borderInkRegion.colorIndex = borderInkColorIndex;

  int borderInkRegionIndex   = m_regions.count();

  m_regions.append(borderInkRegion);

  for (int y = 0; y < ly; y++) {

    unsigned short *workScanLine  = m_regionRas->pixels(y);

    unsigned char *borderScanLine = m_borderRas->pixels(y);

    for (int x = 0; x < lx; x++) {

      int c = workScanLine[x];

      if (borderScanLine[x] != 1) continue;  // consider border pixel only

      if (0 == (m_regions[c].type & RegionInfo::Paint) &&

          m_regions[c].type != RegionInfo::Unknown)

        continue;  // consider paint pixels only

      // is touching a different no-ink pixel?

      bool touchesOtherRegion = false;

      for (int j = 0; j < 8; j++) {

        int x1 = x + dd[j][0], y1 = y + dd[j][1];

        if (0 <= x1 && x1 < lx && 0 <= y1 && y1 < ly) {

          int c1 = m_regionRas->pixels(y1)[x1];

          if (m_regions[c1].type == RegionInfo::Background) {

            touchesOtherRegion = true;

            break;

          } else if (m_regions[c1].type == RegionInfo::Unknown ||

                     (m_regions[c1].type & RegionInfo::Paint) != 0) {

            // OLD: note: we consider only regions with a lower index, to avoid

            // to create double border strokes

            // NEW: we put synthetic ink pixels in larger regions

            // UPDATE 2017/5/12 : we put ink on darker style

            if (colorsBrightness[m_regions[c1].colorIndex] >

                colorsBrightness[m_regions[c].colorIndex]) {

              touchesOtherRegion = true;

              break;

            }

          }

        }

      }

      if (touchesOtherRegion) {

        m_syntheticInkRas->pixels(y)[x] = 1;

      }

    }

  }

}

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

void Naa2TlvConverter::measureThickness() {

  QTime timer;

  timer.start();

  if (!m_regionRas || !m_borderRas) return;

  unsigned short *regionBuffer = m_regionRas->pixels();

  unsigned char *borderBuffer  = m_borderRas->pixels();

  int lx                       = m_regionRas->getLx();

  int ly                       = m_regionRas->getLy();

  if (!m_dotRas || m_dotRas->getLx() != lx || m_dotRas->getLy() != ly) {

    delete m_dotRas;

    m_dotRas = new WorkRaster<unsigned char="">(lx, ly);</unsigned>

  }

  memset(m_dotRas->pixels(), 0, lx * ly);

  // for(int i=0;i<lx*ly;i++) m_dotras-="">pixels()[i]=0;</lx*ly;i++)>

  unsigned char *dotBuffer = m_dotRas->pixels();

  for (int y = 0; y < ly; y++) {

    for (int x = 0; x < lx; x++) {

      if (borderBuffer[y * lx + x] != 1) continue;

      if (dotBuffer[y * lx + x] != 0) continue;

      int regionId       = regionBuffer[y * lx + x];

      RegionInfo ®ion = m_regions[regionId];

      int type           = region.type;

      if (type == RegionInfo::Background || type == RegionInfo::LargePaint ||

          type == RegionInfo::ThinInk)

        continue;

      int thickness = measureThickness(x, y);

      if (thickness < 1) continue;

      QMap<int, int="">::Iterator it = region.thicknessHistogram.find(thickness);</int,>

      if (it != region.thicknessHistogram.end())

        it.value() += 1;

      else

        region.thicknessHistogram.insert(thickness, 1);

    }

  }

  for (int i = 0; i < m_regions.count(); i++) {

    RegionInfo ®ion = m_regions[i];

    int type           = region.type;

    if (type == RegionInfo::Background || type == RegionInfo::LargePaint ||

        type == RegionInfo::ThinInk)

      continue;

    int thicknessCount = 0;

    double thickness   = 0.0;

    for (QMap<int, int="">::Iterator it = region.thicknessHistogram.begin();</int,>

         it != region.thicknessHistogram.end(); ++it) {

      thicknessCount += it.value();

      thickness += it.key() * it.value();

    }

    if (thicknessCount > 0) {

      thickness *= 1.0 / thicknessCount;

      region.thickness = thickness;

    }

  }

  qDebug() << "measure thickness. time=" << timer.elapsed();

}

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

int Naa2TlvConverter::measureThickness(int x0, int y0) {

  if (!m_regionRas || !m_borderRas || !m_dotRas) return -1;

  unsigned short *regionBuffer = m_regionRas->pixels();

  unsigned char *borderBuffer  = m_borderRas->pixels();

  unsigned char *dotBuffer     = m_dotRas->pixels();

  int lx = m_regionRas->getLx();

  int ly = m_regionRas->getLy();