void CGUITextLayout::LineBreakText(const vecText &text, vector<CGUIString> &lines)
{
  int nMaxLines = (m_maxHeight > 0 && m_font && m_font->GetLineHeight() > 0)?(int)ceilf(m_maxHeight / m_font->GetLineHeight()):-1;
  vecText::const_iterator lineStart = text.begin();
  vecText::const_iterator pos = text.begin();
  while (pos != text.end() && (nMaxLines <= 0 || lines.size() < (size_t)nMaxLines))
  {
    // Get the current letter in the string
    character_t letter = *pos;

    // Handle the newline character
    if ((letter & 0xffff) == L'\n' )
    { // push back everything up till now
      CGUIString string(lineStart, pos, true);
      lines.push_back(string);
      lineStart = pos + 1;
    }
    pos++;
  }
  // handle the last line if non-empty
  if (lineStart < text.end() && (nMaxLines <= 0 || lines.size() < (size_t)nMaxLines))
  {
    CGUIString string(lineStart, text.end(), true);
    lines.push_back(string);
  }
}

void CGUITextLayout::AppendToUTF32(const CStdStringW &utf16, character_t colStyle, vecText &utf32)
{
  // NOTE: Assumes a single line of text
  utf32.reserve(utf32.size() + utf16.size());
  for (unsigned int i = 0; i < utf16.size(); i++)
    utf32.push_back(utf16[i] | colStyle);
}

void CRssReader::getFeed(vecText &text)
{
  text.clear();
  // double the spaces at the start of the set
  for (int j = 0; j < m_spacesBetweenFeeds; j++)
    text.push_back(L' ');
  for (unsigned int i = 0; i < m_strFeed.size(); i++)
  {
    for (int j = 0; j < m_spacesBetweenFeeds; j++)
      text.push_back(L' ');

    for (unsigned int j = 0; j < m_strFeed[i].size(); j++)
    {
      character_t letter = m_strFeed[i][j] | ((m_strColors[i][j] - 48) << 16);
      text.push_back(letter);
    }
  }
}

void CGUIFont::DrawScrollingText(float x, float y, const vecColors &colors, color_t shadowColor,
                const vecText &text, uint32_t alignment, float maxWidth, const CScrollInfo &scrollInfo)
{
  if (!m_font) return;
  if (!shadowColor) shadowColor = m_shadowColor;

  if (!text.size() || ClippedRegionIsEmpty(x, y, maxWidth, alignment))
    return; // nothing to render

  if (!scrollInfo.m_widthValid)
  {
    /* Calculate the pixel width of the complete string */
    scrollInfo.m_textWidth = GetTextWidth(text);
    scrollInfo.m_totalWidth = scrollInfo.m_textWidth + GetTextWidth(scrollInfo.suffix);
    scrollInfo.m_widthValid = true;
  }

  assert(scrollInfo.m_totalWidth != 0);

  float textPixelWidth = ROUND(scrollInfo.m_textWidth / g_graphicsContext.GetGUIScaleX());
  float suffixPixelWidth = ROUND((scrollInfo.m_totalWidth - scrollInfo.m_textWidth) / g_graphicsContext.GetGUIScaleX());

  float offset;
  if(scrollInfo.pixelSpeed >= 0)
    offset = scrollInfo.pixelPos;
  else
    offset = scrollInfo.m_totalWidth - scrollInfo.pixelPos;

  vecColors renderColors;
  for (unsigned int i = 0; i < colors.size(); i++)
    renderColors.push_back(g_graphicsContext.MergeAlpha(colors[i] ? colors[i] : m_textColor));

  bool scroll =  !scrollInfo.waitTime && scrollInfo.pixelSpeed;
  if (shadowColor)
  {
    shadowColor = g_graphicsContext.MergeAlpha(shadowColor);
    vecColors shadowColors;
    for (unsigned int i = 0; i < renderColors.size(); i++)
      shadowColors.push_back((renderColors[i] & 0xff000000) != 0 ? shadowColor : 0);
    for (float dx = -offset; dx < maxWidth; dx += scrollInfo.m_totalWidth)
    {
      m_font->DrawTextInternal(x + dx + 1, y + 1, shadowColors, text, alignment, textPixelWidth, scroll);
      m_font->DrawTextInternal(x + dx + scrollInfo.m_textWidth + 1, y + 1, shadowColors, scrollInfo.suffix, alignment, suffixPixelWidth, scroll);
    }
  }
  for (float dx = -offset; dx < maxWidth; dx += scrollInfo.m_totalWidth)
  {
    m_font->DrawTextInternal(x + dx, y, renderColors, text, alignment, textPixelWidth, scroll);
    m_font->DrawTextInternal(x + dx + scrollInfo.m_textWidth, y, renderColors, scrollInfo.suffix, alignment, suffixPixelWidth, scroll);
  }

  g_graphicsContext.RestoreClipRegion();
}

void CGUITextLayout::LineBreakText(const vecText &text, vector<CGUIString> &lines)
{
  bool bUseHeight = (m_maxHeight > 0 && m_font && m_font->GetLineHeight() > 0);
  int nMaxLines = bUseHeight?(int)(m_maxHeight / m_font->GetLineHeight()):-1;
  if (bUseHeight && nMaxLines == 0) // hack. if height is not enough - force 1 line of text
    nMaxLines = 1;
  
  vecText::const_iterator lineStart = text.begin();
  vecText::const_iterator pos = text.begin();
  while (pos != text.end() && (nMaxLines <= 0 || lines.size() < (size_t)nMaxLines))
  {
    // Get the current letter in the string
    character_t letter = *pos;

    // Handle the newline character
    if ((letter & 0xffff) == L'\n' )
    { // push back everything up till now
      CGUIString string(lineStart, pos, true);
      lines.push_back(string);
      lineStart = pos + 1;
    }
    pos++;
  }
}

bool CGUIFont::UpdateScrollInfo(const vecText &text, CScrollInfo &scrollInfo)
{
  // draw at our scroll position
  // we handle the scrolling as follows:
  //   We scroll on a per-pixel basis (eschewing the use of character indices
  //   which were also in use previously). The complete string, including suffix,
  //   is plotted to achieve the desired effect - normally just the one time, but
  //   if there is a wrap point within the viewport then it will be plotted twice.
  //   If the string is smaller than the viewport, then it may be plotted even
  //   more times than that.
  //
  if (g_application.ScreenSaverDisablesAutoScrolling())
    return false;

  if (scrollInfo.waitTime)
  {
    scrollInfo.waitTime--;
    return false;
  }

  if (text.empty())
    return false;

  CScrollInfo old(scrollInfo);

  // move along by the appropriate scroll amount
  float scrollAmount = fabs(scrollInfo.GetPixelsPerFrame() * g_graphicsContext.GetGUIScaleX());

  if (!scrollInfo.m_widthValid)
  {
    /* Calculate the pixel width of the complete string */
    scrollInfo.m_textWidth = GetTextWidth(text);
    scrollInfo.m_totalWidth = scrollInfo.m_textWidth + GetTextWidth(scrollInfo.suffix);
    scrollInfo.m_widthValid = true;
  }
  scrollInfo.pixelPos += scrollAmount;
  assert(scrollInfo.m_totalWidth != 0);
  while (scrollInfo.pixelPos >= scrollInfo.m_totalWidth)
    scrollInfo.pixelPos -= scrollInfo.m_totalWidth;

  if (scrollInfo.pixelPos != old.pixelPos)
    return true;
  else
    return false;
}

void CGUIFontTTFBase::DrawTextInternal(float x, float y, const vecColors &colors, const vecText &text, uint32_t alignment, float maxPixelWidth, bool scrolling)
{
  Begin();

  // save the origin, which is scaled separately
  m_originX = x;
  m_originY = y;

  // Check if we will really need to truncate or justify the text
  if ( alignment & XBFONT_TRUNCATED )
  {
    if ( maxPixelWidth <= 0.0f || GetTextWidthInternal(text.begin(), text.end()) <= maxPixelWidth)
      alignment &= ~XBFONT_TRUNCATED;
  }
  else if ( alignment & XBFONT_JUSTIFIED )
  {
    if ( maxPixelWidth <= 0.0f )
      alignment &= ~XBFONT_JUSTIFIED;
  }

  // calculate sizing information
  float startX = 0;
  float startY = (alignment & XBFONT_CENTER_Y) ? -0.5f*m_cellHeight : 0;  // vertical centering

  if ( alignment & (XBFONT_RIGHT | XBFONT_CENTER_X) )
  {
    // Get the extent of this line
    float w = GetTextWidthInternal( text.begin(), text.end() );

    if ( alignment & XBFONT_TRUNCATED && w > maxPixelWidth + 0.5f ) // + 0.5f due to rounding issues
      w = maxPixelWidth;

    if ( alignment & XBFONT_CENTER_X)
      w *= 0.5f;
    // Offset this line's starting position
    startX -= w;
  }

  float spacePerLetter = 0; // for justification effects
  if ( alignment & XBFONT_JUSTIFIED )
  {
    // first compute the size of the text to render in both characters and pixels
    unsigned int lineChars = 0;
    float linePixels = 0;
    for (vecText::const_iterator pos = text.begin(); pos != text.end(); ++pos)
    {
      Character *ch = GetCharacter(*pos);
      if (ch)
      { // spaces have multiple times the justification spacing of normal letters
        lineChars += ((*pos & 0xffff) == L' ') ? justification_word_weight : 1;
        linePixels += ch->advance;
      }
    }
    if (lineChars > 1)
      spacePerLetter = (maxPixelWidth - linePixels) / (lineChars - 1);
  }
  float cursorX = 0; // current position along the line

  for (vecText::const_iterator pos = text.begin(); pos != text.end(); ++pos)
  {
    // If starting text on a new line, determine justification effects
    // Get the current letter in the CStdString
    color_t color = (*pos & 0xff0000) >> 16;
    if (color >= colors.size())
      color = 0;
    color = colors[color];

    // grab the next character
    Character *ch = GetCharacter(*pos);
    if (!ch) continue;

    if ( alignment & XBFONT_TRUNCATED )
    {
      // Check if we will be exceeded the max allowed width
      if ( cursorX + ch->advance + 3 * m_ellipsesWidth > maxPixelWidth )
      {
        // Yup. Let's draw the ellipses, then bail
        // Perhaps we should really bail to the next line in this case??
        Character *period = GetCharacter(L'.');
        if (!period)
          break;

        for (int i = 0; i < 3; i++)
        {
          RenderCharacter(startX + cursorX, startY, period, color, !scrolling);
          cursorX += period->advance;
        }
        break;
      }
    }
    else if (maxPixelWidth > 0 && cursorX > maxPixelWidth)
      break;  // exceeded max allowed width - stop rendering

    RenderCharacter(startX + cursorX, startY, ch, color, !scrolling);
    if ( alignment & XBFONT_JUSTIFIED )
    {
      if ((*pos & 0xffff) == L' ')
        cursorX += ch->advance + spacePerLetter * justification_word_weight;
      else
        cursorX += ch->advance + spacePerLetter;
//.........这里部分代码省略.........

void CGUIFontTTFBase::DrawTextInternal(float x, float y, const vecColors &colors, const vecText &text, uint32_t alignment, float maxPixelWidth, bool scrolling)
{
  Begin();

  uint32_t rawAlignment = alignment;
  bool dirtyCache;
  bool hardwareClipping = g_Windowing.ScissorsCanEffectClipping();
  CGUIFontCacheStaticPosition staticPos(x, y);
  CGUIFontCacheDynamicPosition dynamicPos;
  if (hardwareClipping)
  {
    dynamicPos = CGUIFontCacheDynamicPosition(g_graphicsContext.ScaleFinalXCoord(x, y),
                                              g_graphicsContext.ScaleFinalYCoord(x, y),
                                              g_graphicsContext.ScaleFinalZCoord(x, y));
  }
  CVertexBuffer unusedVertexBuffer;
  CVertexBuffer &vertexBuffer = hardwareClipping ?
      m_dynamicCache.Lookup(dynamicPos,
                            colors, text,
                            alignment, maxPixelWidth,
                            scrolling,
                            XbmcThreads::SystemClockMillis(),
                            dirtyCache) :
      unusedVertexBuffer;
  std::shared_ptr<std::vector<SVertex> > tempVertices = std::make_shared<std::vector<SVertex> >();
  std::shared_ptr<std::vector<SVertex> > &vertices = hardwareClipping ?
      tempVertices :
      static_cast<std::shared_ptr<std::vector<SVertex> >&>(m_staticCache.Lookup(staticPos,
                           colors, text,
                           alignment, maxPixelWidth,
                           scrolling,
                           XbmcThreads::SystemClockMillis(),
                           dirtyCache));
  if (dirtyCache)
  {
    // save the origin, which is scaled separately
    m_originX = x;
    m_originY = y;

    // Check if we will really need to truncate or justify the text
    if ( alignment & XBFONT_TRUNCATED )
    {
      if ( maxPixelWidth <= 0.0f || GetTextWidthInternal(text.begin(), text.end()) <= maxPixelWidth)
        alignment &= ~XBFONT_TRUNCATED;
    }
    else if ( alignment & XBFONT_JUSTIFIED )
    {
      if ( maxPixelWidth <= 0.0f )
        alignment &= ~XBFONT_JUSTIFIED;
    }

    // calculate sizing information
    float startX = 0;
    float startY = (alignment & XBFONT_CENTER_Y) ? -0.5f*m_cellHeight : 0;  // vertical centering

    if ( alignment & (XBFONT_RIGHT | XBFONT_CENTER_X) )
    {
      // Get the extent of this line
      float w = GetTextWidthInternal( text.begin(), text.end() );

      if ( alignment & XBFONT_TRUNCATED && w > maxPixelWidth + 0.5f ) // + 0.5f due to rounding issues
        w = maxPixelWidth;

      if ( alignment & XBFONT_CENTER_X)
        w *= 0.5f;
      // Offset this line's starting position
      startX -= w;
    }

    float spacePerSpaceCharacter = 0; // for justification effects
    if ( alignment & XBFONT_JUSTIFIED )
    {
      // first compute the size of the text to render in both characters and pixels
      unsigned int numSpaces = 0;
      float linePixels = 0;
      for (vecText::const_iterator pos = text.begin(); pos != text.end(); ++pos)
      {
        Character *ch = GetCharacter(*pos);
        if (ch)
        {
          if ((*pos & 0xffff) == L' ')
            numSpaces +=  1;
          linePixels += ch->advance;
        }
      }
      if (numSpaces > 0)
        spacePerSpaceCharacter = (maxPixelWidth - linePixels) / numSpaces;
    }

    float cursorX = 0; // current position along the line
    for (vecText::const_iterator pos = text.begin(); pos != text.end(); ++pos)
    {
      // If starting text on a new line, determine justification effects
      // Get the current letter in the CStdString
      color_t color = (*pos & 0xff0000) >> 16;
      if (color >= colors.size())
        color = 0;
      color = colors[color];

      // grab the next character
//.........这里部分代码省略.........

void CGUITextLayout::GetFirstText(vecText &text) const
{
  text.clear();
  if (m_lines.size())
    text = m_lines[0].m_text;
}

void CGUITextLayout::ParseText(const CStdStringW &text, uint32_t defaultStyle, color_t defaultColor, vecColors &colors, vecText &parsedText)
{
  // run through the string, searching for:
  // [B] or [/B] -> toggle bold on and off
  // [I] or [/I] -> toggle italics on and off
  // [COLOR ffab007f] or [/COLOR] -> toggle color on and off
  // [CAPS <option>] or [/CAPS] -> toggle capatilization on and off

  uint32_t currentStyle = defaultStyle; // start with the default font's style
  color_t currentColor = 0;

  colors.push_back(defaultColor);
  stack<color_t> colorStack;
  colorStack.push(0);

  // these aren't independent, but that's probably not too much of an issue
  // eg [UPPERCASE]Glah[LOWERCASE]FReD[/LOWERCASE]Georeg[/UPPERCASE] will work (lower case >> upper case)
  // but [LOWERCASE]Glah[UPPERCASE]FReD[/UPPERCASE]Georeg[/LOWERCASE] won't

  int startPos = 0;
  size_t pos = text.Find(L'[');
  while (pos != CStdString::npos && pos + 1 < text.size())
  {
    uint32_t newStyle = 0;
    color_t newColor = currentColor;
    bool colorTagChange = false;
    bool newLine = false;
    // have a [ - check if it's an ON or OFF switch
    bool on(true);
    int endPos = pos++; // finish of string
    if (text[pos] == L'/')
    {
      on = false;
      pos++;
    }
    // check for each type
    if (text.Mid(pos,2) == L"B]")
    { // bold - finish the current text block and assign the bold state
      pos += 2;
      if ((on && text.Find(L"[/B]",pos) >= 0) ||          // check for a matching end point
         (!on && (currentStyle & FONT_STYLE_BOLD)))       // or matching start point
        newStyle = FONT_STYLE_BOLD;
    }
    else if (text.Mid(pos,2) == L"I]")
    { // italics
      pos += 2;
      if ((on && text.Find(L"[/I]",pos) >= 0) ||          // check for a matching end point
         (!on && (currentStyle & FONT_STYLE_ITALICS)))    // or matching start point
        newStyle = FONT_STYLE_ITALICS;
    }
    else if (text.Mid(pos,10) == L"UPPERCASE]")
    {
      pos += 10;
      if ((on && text.Find(L"[/UPPERCASE]",pos) >= 0) ||  // check for a matching end point
         (!on && (currentStyle & FONT_STYLE_UPPERCASE)))  // or matching start point
        newStyle = FONT_STYLE_UPPERCASE;
    }
    else if (text.Mid(pos,10) == L"LOWERCASE]")
    {
      pos += 10;
      if ((on && text.Find(L"[/LOWERCASE]",pos) >= 0) ||  // check for a matching end point
         (!on && (currentStyle & FONT_STYLE_LOWERCASE)))  // or matching start point
        newStyle = FONT_STYLE_LOWERCASE;
    }
    else if (text.Mid(pos,3) == L"CR]" && on)
    {
      newLine = true;
      pos += 3;
    }
    else if (text.Mid(pos,5) == L"COLOR")
    { // color
      size_t finish = text.Find(L']', pos + 5);
      if (on && finish != CStdString::npos && (size_t)text.Find(L"[/COLOR]",finish) != CStdString::npos)
      {
        color_t color = g_colorManager.GetColor(text.Mid(pos + 5, finish - pos - 5));
        vecColors::const_iterator it = std::find(colors.begin(), colors.end(), color);
        if (it == colors.end())
        { // create new color
          if (colors.size() <= 0xFF)
          {
            newColor = colors.size();
            colors.push_back(color);
          }
          else // we have only 8 bits for color index, fallback to first color if reach max.
            newColor = 0;
        }
        else
          // reuse existing color
          newColor = it - colors.begin();
        colorStack.push(newColor);
        colorTagChange = true;
      }
      else if (!on && finish == pos + 5 && colorStack.size() > 1)
      { // revert to previous color
        colorStack.pop();
        newColor = colorStack.top();
        colorTagChange = true;
      }
      if (finish != CStdString::npos)
        pos = finish + 1;
//.........这里部分代码省略.........

float CGUIFont::GetTextWidth( const vecText &text )
{
  if (!m_font) return 0;
  CSingleLock lock(g_graphicsContext);
  return m_font->GetTextWidthInternal(text.begin(), text.end()) * g_graphicsContext.GetGUIScaleX();
}

void CGUITextLayout::ParseText(const CStdStringW &text, uint32_t defaultStyle, vecColors &colors, vecText &parsedText)
{
  // run through the string, searching for:
  // [B] or [/B] -> toggle bold on and off
  // [I] or [/I] -> toggle italics on and off
  // [COLOR ffab007f] or [/COLOR] -> toggle color on and off
  // [CAPS <option>] or [/CAPS] -> toggle capatilization on and off

//  uint32_t currentStyle = defaultStyle; // start with the default font's style
//  color_t currentColor = 0;

  stack<color_t> colorStack;
  colorStack.push(0);

  // these aren't independent, but that's probably not too much of an issue
  // eg [UPPERCASE]Glah[LOWERCASE]FReD[/LOWERCASE]Georeg[/UPPERCASE] will work (lower case >> upper case)
  // but [LOWERCASE]Glah[UPPERCASE]FReD[/UPPERCASE]Georeg[/LOWERCASE] won't
#define FONT_STYLE_UPPERCASE 4
#define FONT_STYLE_LOWERCASE 8

  int boldCounter = 0;
  int italicsCoutner = 0;
  int upperCounter = 0;
  int lowerCounter = 0;
  color_t color = 0;

  int startPos = 0;
  size_t pos = text.Find(L'[');
  while (pos != CStdString::npos && pos + 1 < text.size())
  {
    int style = 0;

    if (pos - startPos > 0)
    {
      if (boldCounter)
        style |= FONT_STYLE_BOLD;

      if (italicsCoutner)
        style |= FONT_STYLE_ITALICS;

      CStdStringW subText = text.Mid(startPos, pos - startPos);

      if (upperCounter)
      {
#if defined(_LINUX) && !defined(__APPLE__)
        std::transform(subText.begin(), subText.end(), subText.begin(),
                       (gunichar(*)(gunichar)) g_unichar_toupper);
#else
        subText.ToUpper();
#endif
      }

      if (lowerCounter)
      {
#if defined(_LINUX) && !defined(__APPLE__)
        std::transform(subText.begin(), subText.end(), subText.begin(),
                       (gunichar(*)(gunichar)) g_unichar_tolower);
#else
        subText.ToLower();
#endif
      }

      AppendToUTF32(subText, ((style & 3) << 24) | (color << 16), parsedText);

      startPos = pos;
    }

    // have a [ - check if it's an ON or OFF switch
    bool ignoreTag = false;
    ++pos;

    bool on = true;
    if (text[pos] == L'/')
    {
      on = false;
      pos++;
    }

    // check for each type
    if (text.Mid(pos,2) == L"B]")
    { // bold - finish the current text block and assign the bold state
      pos += 2;
      on ? ++boldCounter : --boldCounter;
    }
    else if (text.Mid(pos,2) == L"I]")
    { // italics
      pos += 2;
      on ? ++italicsCoutner : --italicsCoutner;
    }
    else if (text.Mid(pos,10) == L"UPPERCASE]")
    {
      pos += 10;
      on ? ++upperCounter : --upperCounter;
    }
    else if (text.Mid(pos,10) == L"LOWERCASE]")
    {
      pos += 10;
      on ? ++lowerCounter : --lowerCounter;
    }
    else if (text.Mid(pos,3) == L"CR]" && on)
//.........这里部分代码省略.........

void CGUIFontTTFBase::BuildTextCoordinates(float x, float y, const vecColors &colors, color_t shadowColor,
        const vecText &text, uint32_t alignment, float maxPixelWidth, bool scrolling, FontCoordsIndiced& pData)
{
    // Check if we will really need to truncate or justify the text
    m_originX = x;
    m_originY = y;

    if ( alignment & XBFONT_TRUNCATED )
    {
        if ( maxPixelWidth <= 0.0f || GetTextWidthInternal(text.begin(), text.end()) <= maxPixelWidth)
            alignment &= ~XBFONT_TRUNCATED;
    }
    else if ( alignment & XBFONT_JUSTIFIED )
    {
        if ( maxPixelWidth <= 0.0f )
            alignment &= ~XBFONT_JUSTIFIED;
    }

    // calculate sizing information
    float startX = 0;
    float startY = (alignment & XBFONT_CENTER_Y) ? -0.5f*(m_cellHeight-2) : 0;  // vertical centering

    if ( alignment & (XBFONT_RIGHT | XBFONT_CENTER_X) )
    {
        // Get the extent of this line
        float w = GetTextWidthInternal( text.begin(), text.end() );

        if ( alignment & XBFONT_TRUNCATED && w > maxPixelWidth )
            w = maxPixelWidth;

        if ( alignment & XBFONT_CENTER_X)
            w *= 0.5f;
        // Offset this line's starting position
        startX -= w;
    }

    float spacePerLetter = 0; // for justification effects
#if 0
    if ( alignment & XBFONT_JUSTIFIED )
    {
        // first compute the size of the text to render in both characters and pixels
        unsigned int lineChars = 0;
        float linePixels = 0;
        for (vecText::const_iterator pos = text.begin(); pos != text.end(); pos++)
        {
            Character *ch = GetCharacter(*pos);
            if (ch)
            {   // spaces have multiple times the justification spacing of normal letters
                lineChars += ((*pos & 0xffff) == L' ') ? justification_word_weight : 1;
                linePixels += ch->advance;
            }
        }
        if (lineChars > 1)
            spacePerLetter = (maxPixelWidth - linePixels) / (lineChars - 1);
    }
#endif

    ReloadFace();

#ifdef HAS_HARFBUZZ_NG
    int i = 0;
    wchar_t strW[text.size()];
    for (vecText::const_iterator pos = text.begin(); pos != text.end(); pos++)
    {
        wchar_t letter = (wchar_t)((*pos) & 0xffff);
        strW[i] = letter;
        i++;
    }

    hb_buffer_t *hb_buffer = hb_buffer_create(text.size());
    hb_buffer_set_unicode_funcs(hb_buffer, hb_glib_get_unicode_funcs());
    hb_buffer_add_utf32(hb_buffer, (const uint32_t*) strW, text.size(), 0, text.size());
    hb_buffer_set_direction(hb_buffer, HB_DIRECTION_LTR);

    hb_shape (hb_font, hb_buffer, NULL, 0);
    unsigned int glyph_info_len;
    hb_glyph_info_t *hb_glyph = hb_buffer_get_glyph_infos (hb_buffer, &glyph_info_len);
    hb_glyph_position_t *hb_position = hb_buffer_get_glyph_positions (hb_buffer, &glyph_info_len);

#else /* HAS_HARFBUZZ_NG */
    FT_Vector delta;
    Character* previousCh = NULL;
#endif

    float cursorX = 0; // current position along the line

    for (vecText::const_iterator pos = text.begin(); pos != text.end(); pos++)
    {
        // If starting text on a new line, determine justification effects
        // Get the current letter in the CStdString
        color_t color = (*pos & 0xff0000) >> 16;
        if (color >= colors.size())
            color = 0;
        color = colors[color];

        // grab the next character
        Character *ch = GetCharacter(*pos);
        if (!ch) continue;

        if ( alignment & XBFONT_TRUNCATED )
//.........这里部分代码省略.........