public void ReadGGO(int indexGlyph,
out Outline outl,
DIAction dia)
{
this.m_validator.DIA = dia;
outl = null;
GConsts.TypeGlyph typeGlyph;
this.ReadTypeGlyph(indexGlyph, out typeGlyph, dia);
if (typeGlyph != GConsts.TypeGlyph.Simple)
{
return;
}
int offsStart, length;
if (!this.m_tableLoca.GetValidateEntryGlyf(indexGlyph,
out offsStart, out length, this.m_validator, this.m_font))
{
return;
}
MBOBuffer buffer = this.m_tableGlyf.Buffer;
int iKnot;
ushort[] arrIndKnotEnd;
short[] arrXRel, arrYRel;
byte[] arrFlag;
int numCont;
try
{
numCont = buffer.GetShort((uint)(offsStart + (int)Table_glyf.FieldOffsets.numCont));
arrIndKnotEnd = new ushort [numCont];
for (short iCont = 0; iCont < numCont; iCont++)
{
arrIndKnotEnd[iCont] = buffer.GetUshort((uint)(offsStart + Table_glyf.FieldOffsets.nextAfterHeader + iCont * 2));
}
int numKnot = arrIndKnotEnd[numCont - 1] + 1;
uint offsInstrLength = (uint)(offsStart + Table_glyf.FieldOffsets.nextAfterHeader + 2 * numCont);
ushort lengthInstr = buffer.GetUshort(offsInstrLength);
uint offsInstr = offsInstrLength + 2;
uint offsFlag = offsInstr + lengthInstr;
arrFlag = new byte [numKnot];
iKnot = 0; // index of flag in array flags
uint offsCur = offsFlag; // counter of flag in the file
while (iKnot < numKnot)
{
byte flag = buffer.GetByte(offsCur++);
arrFlag[iKnot++] = flag;
bool toRepeat = ((flag & (byte)(Table_glyf.MaskFlagKnot.toRepeat)) != 0);
if (toRepeat)
{
byte numRepeat = buffer.GetByte(offsCur++);
for (byte iRepeat = 0; iRepeat < numRepeat; iRepeat++)
{
arrFlag[iKnot++] = flag;
}
}
}
arrXRel = new short [numKnot];
arrYRel = new short [numKnot];
// read data for x-coordinates
for (iKnot = 0; iKnot < numKnot; iKnot++)
{
if ((arrFlag[iKnot] & (byte)(Table_glyf.MaskFlagKnot.isXByte)) != 0)
{
byte xRel = buffer.GetByte(offsCur++);
if ((arrFlag[iKnot] & (byte)(Table_glyf.MaskFlagKnot.isXSameOrPozitive)) != 0)
{
arrXRel[iKnot] = xRel;
}
else
{
arrXRel[iKnot] = (short)(-xRel);
}
}
else
{
if ((arrFlag[iKnot] & (byte)(Table_glyf.MaskFlagKnot.isXSameOrPozitive)) != 0)
{
arrXRel[iKnot] = 0;
}
else
{
arrXRel[iKnot] = buffer.GetShort(offsCur);
offsCur += 2;
}
}
}
// read data for y-coordinates
for (iKnot = 0; iKnot < numKnot; iKnot++)
{
if ((arrFlag[iKnot] & (byte)(Table_glyf.MaskFlagKnot.isYByte)) != 0)
{
byte yRel = buffer.GetByte(offsCur++);
if ((arrFlag[iKnot] & (byte)(Table_glyf.MaskFlagKnot.isYSameOrPozitive)) != 0)
{
arrYRel[iKnot] = yRel;
}
else
{
arrYRel[iKnot] = (short)(-yRel);
}
}
else
{
if ((arrFlag[iKnot] & (byte)(Table_glyf.MaskFlagKnot.isYSameOrPozitive)) != 0)
{
arrYRel[iKnot] = 0;
}
else
{
arrYRel[iKnot] = buffer.GetShort(offsCur);
offsCur += 2;
}
}
}
if (offsCur - 2 >= offsStart + length)
{
throw new System.IndexOutOfRangeException();
}
}
catch (System.IndexOutOfRangeException)
{
this.m_validator.Error(
E._GEN_E_OffsetExceedsTableLength,
(OTTag)"glyf");
return;
}
try
{
short xAbs = 0;
short yAbs = 0;
int indKnotStart, indKnotEnd = -1;
outl = new Outline();
for (ushort iCont = 0; iCont < numCont; iCont++)
{
indKnotStart = indKnotEnd + 1;
indKnotEnd = arrIndKnotEnd[iCont];
Contour cont = null;
cont = new Contour();
for (iKnot = indKnotStart; iKnot <= indKnotEnd; iKnot++)
{
xAbs += arrXRel[iKnot];
yAbs += arrYRel[iKnot];
bool isOn = ((arrFlag[iKnot] & ((byte)(Table_glyf.MaskFlagKnot.isOnCurve))) != 0);
Knot knot = new Knot(iKnot, xAbs, yAbs, isOn);
cont.KnotAdd(knot);
}
outl.ContourAdd(cont);
}
}
catch
{
outl.ClearDestroy();
outl = null;
}
}
