public override int GetCharWidth(PDFFont pdfFont, TTFontData data,
char charCode)
{
InitLibrary();
int aint = (int)charCode;
if (data.Widths.IndexOfKey(charCode) >= 0)
{
return(data.Widths[charCode]);
}
LogFontFt cfont = data.LogFont;
cfont.OpenFont();
int awidth = 0;
Monitor.Enter(flag);
try
{
if (data.Widths.IndexOfKey(charCode) >= 0)
{
awidth = data.Widths[charCode];
}
else
{
if (0 == FT.FT_Load_Char(cfont.iface, (uint)charCode, (int)FT.FT_LOAD_NO_SCALE))
{
FT_FaceRec aface = (FT_FaceRec)Marshal.PtrToStructure(cfont.iface, typeof(FT_FaceRec));
FT_GlyphSlotRec aglyph = (FT_GlyphSlotRec)Marshal.PtrToStructure(aface.glyph, typeof(FT_GlyphSlotRec));
ushort width1 = (ushort)(aglyph.linearHoriAdvance >> 16);
ushort width2 = (ushort)(aglyph.linearHoriAdvance & 0x0000FFFF);
double dwidth = width1 + width2 / (double)65535;
awidth = System.Convert.ToInt32(Math.Round(cfont.widthmult * dwidth));
}
data.Widths[charCode] = awidth;
data.Glyphs[charCode] = System.Convert.ToInt32(FT.FT_Get_Char_Index(cfont.iface, charCode));
if (data.FirstLoaded > aint)
{
data.FirstLoaded = aint;
}
if (data.LastLoaded < aint)
{
data.LastLoaded = aint;
}
}
}
finally
{
Monitor.Exit(flag);
}
return(awidth);
}
public override int GetKerning(PDFFont pdfFont, TTFontData data,
char leftChar, char rightChar)
{
LogFontFt cfont = data.LogFont;
if (!cfont.havekerning)
{
return(0);
}
int nresult = 0;
//string nkerning = ""+leftChar+rightChar;
ulong nkerning = (ulong)((int)leftChar << 32) + (ulong)rightChar;
if (data.Kernings.IndexOfKey(nkerning) >= 0)
{
return(data.Kernings[nkerning]);
}
cfont.OpenFont();
Monitor.Enter(flag);
try
{
if (data.Kernings.IndexOfKey(nkerning) >= 0)
{
nresult = data.Kernings[nkerning];
}
uint w1 = FT.FT_Get_Char_Index(cfont.iface, (uint)leftChar);
if (w1 > 0)
{
uint w2 = FT.FT_Get_Char_Index(cfont.iface, (uint)rightChar);
if (w2 > 0)
{
FT_Vector akerning;
CheckFreeType(FT.FT_Get_Kerning(cfont.iface, w1, w2, (uint)FT_Kerning_Flags.FT_KERNING_UNSCALED, out akerning));
nresult = System.Convert.ToInt32(Math.Round(cfont.widthmult * -akerning.x));
}
else
{
data.Kernings.Add(nkerning, 0);
}
}
else
{
data.Kernings.Add(nkerning, 0);
}
}
finally
{
Monitor.Exit(flag);
}
return(nresult);
}
private void SelectFont(PDFFont pdfFont)
{
string fontname = "";
if ((System.Environment.OSVersion.Platform == PlatformID.Unix) || (System.Environment.OSVersion.Platform == PlatformID.MacOSX))
{
fontname = pdfFont.LFontName.ToUpper();
}
else
{
fontname = pdfFont.WFontName.ToUpper();
}
string familyname = fontname;
string suffix = "";
bool isbold = (pdfFont.Style & 1) > 0;
bool isitalic = (pdfFont.Style & 2) > 0;
if (isbold)
{
suffix = "____B1";
}
else
{
suffix = "____B0";
}
if (isitalic)
{
suffix = suffix + "I1";
}
else
{
suffix = suffix + "I0";
}
fontname = fontname + suffix;
if (fontlist.IndexOfKey(fontname) >= 0)
{
currentfont = fontlist[fontname];
return;
}
// Search similar font
string familyonly = "";
foreach (string fname in fontlist.Keys)
{
int idx = fname.IndexOf(familyname);
if (idx >= 0)
{
familyonly = fname;
idx = fname.IndexOf(suffix);
if (idx >= 0)
{
currentfont = fontlist[fname];
return;
}
}
}
if (familyonly.Length > 0)
{
currentfont = fontlist[familyonly];
return;
}
if (isbold && isitalic)
{
currentfont = defaultfontbit;
}
else
if (isbold && (!isitalic))
{
currentfont = defaultfontb;
}
else
if ((!isbold) && (isitalic))
{
currentfont = defaultfontit;
}
else
{
currentfont = defaultfont;
}
fontlist.Add(fontname, currentfont);
}
private static void InitLibrary()
{
Monitor.Enter(flag);
try
{
if (libraryinitialized)
{
return;
}
CheckFreeType(FT.FT_Init_FreeType(out FreeTypeLib));
libraryinitialized = true;
Strings npaths = GetFontDirectories();
foreach (string ndir in npaths)
{
if (Directory.Exists(ndir))
{
string[] nfiles = StreamUtil.GetFiles(ndir, "*.TTF|*.ttf|*.pf*", SearchOption.TopDirectoryOnly);
foreach (string nfile in nfiles)
{
IntPtr iface = (IntPtr)0;
FT_FaceRec aface = new FT_FaceRec();
CheckFreeType(FT.FT_New_Face(FreeTypeLib, nfile, 0, out iface));
try
{
aface = (FT_FaceRec)Marshal.PtrToStructure(iface, typeof(FT_FaceRec));
if ((aface.face_flags & (int)FT_Face_Flags.FT_FACE_FLAG_SCALABLE) != 0)
{
LogFontFt aobj = new LogFontFt();
aobj.ftlibrary = FreeTypeLib;
aobj.fullinfo = false;
// Fill font properties
aobj.type1 = ((int)FT_Face_Flags.FT_FACE_FLAG_SFNT & aface.face_flags) == 0;
if (aobj.type1)
{
aobj.convfactor = 1;
// aobj.convfactor:=1000/aface.units_per_EM;
aobj.widthmult = aobj.convfactor;
}
else
{
aobj.convfactor = 1;
// aobj.convfactor:=1000/aface.units_per_EM;
aobj.widthmult = aobj.convfactor;
}
aobj.filename = nfile;
string family_name = Marshal.PtrToStringAnsi(aface.family_name);
aobj.postcriptname = family_name.Replace(" ", "");
aobj.familyname = family_name;
aobj.keyname = family_name + "____";
aobj.fixedpitch = (aface.face_flags & (int)FT_Face_Flags.FT_FACE_FLAG_FIXED_WIDTH) != 0;
aobj.havekerning = (aface.face_flags & (int)FT_Face_Flags.FT_FACE_FLAG_KERNING) != 0;
int nleft = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.bbox.xMin));
int nright = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.bbox.xMax));
int ntop = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.bbox.yMax));
int nbottom = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.bbox.yMin));
aobj.BBox = new Rectangle(nleft, ntop, nright - nleft, nbottom - ntop);
aobj.ascent = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.ascender));
aobj.descent = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.descender));
aobj.leading = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.height) - (aobj.ascent - aobj.descent));
aobj.MaxWidth = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.max_advance_width));
aobj.Capheight = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.ascender));
string style_name = Marshal.PtrToStringAnsi(aface.style_name);
aobj.stylename = style_name;
aobj.bold = (aface.style_flags & (int)FT_Style_Flags.FT_STYLE_FLAG_BOLD) != 0;
aobj.italic = (aface.style_flags & (int)FT_Style_Flags.FT_STYLE_FLAG_ITALIC) != 0;
if (aobj.bold)
{
aobj.keyname = aobj.keyname + "B1";
}
else
{
aobj.keyname = aobj.keyname + "B0";
}
if (aobj.italic)
{
aobj.keyname = aobj.keyname + "I1";
}
else
{
aobj.keyname = aobj.keyname + "I0";
}
// Default font configuration, LUXI SANS is default
if ((!aobj.italic) && (!aobj.bold))
{
if (defaultfont == null)
{
defaultfont = aobj;
}
else
{
if (aobj.familyname.ToUpper() == "LUXI SANS")
{
defaultfont = aobj;
}
}
}
else
if ((!aobj.italic) && (aobj.bold))
{
if (defaultfontb == null)
{
defaultfontb = aobj;
}
else
{
if (aobj.familyname.ToUpper() == "LUXI SANS")
{
defaultfontb = aobj;
}
}
}
else
if ((aobj.italic) && (!aobj.bold))
{
if (defaultfontit == null)
{
defaultfontit = aobj;
}
else
{
if (aobj.familyname.ToUpper() == "LUXI SANS")
{
defaultfontit = aobj;
}
}
}
else
if ((aobj.italic) && (aobj.bold))
{
if (defaultfontbit == null)
{
defaultfontbit = aobj;
}
else
{
if (aobj.familyname.ToUpper() == "LUXI SANS")
{
defaultfontbit = aobj;
}
}
}
aobj.keyname = aobj.keyname.ToUpper();
if (fontlist.IndexOfKey(aobj.keyname) < 0)
{
fontlist.Add(aobj.keyname.ToUpper(), aobj);
}
}
int nindex = fontfiles.IndexOfKey(nfile);
if (nindex < 0)
{
fontfiles.Add(nfile, nfile);
}
}
finally
{
CheckFreeType(FT.FT_Done_Face(iface));
}
}
}
}
}
finally
{
Monitor.Exit(flag);
}
}
