private static void LoadGlyph(Glyph glyph,int contourCount,FontParser parser,float range){
// The contour count (tiny set):
ushort[] endPointIndices=new ushort[contourCount];
// Load each endpoint:
for(int i=0;i<contourCount;i++){
endPointIndices[i]=parser.ReadUInt16();
}
// How big is the instruction block?
int instructionLength=parser.ReadUInt16();
// And skip it!
parser.Position+=instructionLength;
// How many coordinates?
int numberOfCoordinates=endPointIndices[endPointIndices.Length-1]+1;
// Create the flag set:
byte[] flags=new byte[numberOfCoordinates];
// For each one..
for (int i = 0; i < numberOfCoordinates;i++) {
byte flag=parser.ReadByte();
flags[i]=flag;
// If bit 3 is set, we repeat this flag n times, where n is the next byte.
if((flag&8)>0){
int repeatCount = parser.ReadByte();
for (int j = 0; j < repeatCount; j += 1) {
i++;
flags[i]=flag;
}
}
}
if (endPointIndices.Length > 0) {
// X/Y coordinates are relative to the previous point, except for the first point which is relative to 0,0.
if (numberOfCoordinates > 0){
// Current coord:
int coord=0;
// Coord index:
int coordIndex=0;
// The coord set:
float[] coords=new float[numberOfCoordinates*2];
// Load X coords:
for (int i = 0; i < numberOfCoordinates; i++) {
byte flag = flags[i];
coord = LoadGlyphCoordinate(parser,flag,coord,2,16);
coords[coordIndex]=(float)coord/range;
coordIndex+=2;
}
// Reset shared vars:
coord=0;
coordIndex=1;
// Load Y coords:
for (int i = 0; i < numberOfCoordinates; i++) {
byte flag = flags[i];
coord = LoadGlyphCoordinate(parser,flag,coord,4,32);
coords[coordIndex]=(float)coord/range;
coordIndex+=2;
}
int[] orderedEnds=new int[endPointIndices.Length];
int currentEnd=0;
for (int i = 0; i < numberOfCoordinates; i++) {
// Grab the flag:
byte flag=flags[i];
// On curve flag - Control point otherwise:
flag=(byte)(flag&1);
// Last point of the current contour?
// For each end point index (tiny set - better than hash):
for(int e=endPointIndices.Length-1;e>=0;e--){
if(endPointIndices[e]==i){
orderedEnds[currentEnd]=i;
currentEnd++;
break;
}
}
// Update the flag - it's now just a 1 or 0:
flags[i]=flag;
}
// Reset shared index again:
coordIndex=0;
// Create our temp holders of point info:
GlyphPoint firstPointRaw=new GlyphPoint(flags,coords);
GlyphPoint lastPointRaw=new GlyphPoint(flags,coords);
GlyphPoint prevPointRaw=new GlyphPoint(flags,coords);
GlyphPoint currentPointRaw=new GlyphPoint(flags,coords);
GlyphPoint controlPoint=new GlyphPoint(flags,coords);
// For each contour..
for(int i=0;i<contourCount;i++){
int pointOffset=0;
// Get the indices of the first/last points on this contour.
int firstIndex=0;
int lastIndex=orderedEnds[i];
if(i!=0){
firstIndex=orderedEnds[i-1]+1;
}
GlyphPoint firstPoint=firstPointRaw;
firstPoint.Set(firstIndex);
GlyphPoint lastPoint=lastPointRaw;
lastPoint.Set(lastIndex);
if(firstPoint.OnCurve){
// No control point:
controlPoint.Active=false;
// The first point will be consumed by the moveTo command so skip it:
pointOffset=1;
}else{
if(lastPoint.OnCurve){
// If the first point is off-curve and the last point is on-curve,
// start at the last point.
firstPoint=lastPoint;
}else{
// If both first and last points are off-curve, start at their middle.
firstPoint.X=(firstPoint.X+lastPoint.X)/2f;
firstPoint.Y=(firstPoint.Y+lastPoint.Y)/2f;
}
controlPoint.Set(firstPoint);
}
glyph.MoveTo(firstPoint.X,firstPoint.Y);
int contourStart=firstIndex+pointOffset;
for(int j=contourStart;j<=lastIndex;j++){
// Setup the previous point:
GlyphPoint prevPoint;
if(j==firstIndex){
prevPoint=firstPoint;
}else{
prevPoint=prevPointRaw;
prevPoint.Set(j-1);
}
// Setup the current point:
GlyphPoint pt=currentPointRaw;
pt.Set(j);
if(prevPoint.OnCurve && pt.OnCurve) {
// Just a line here:
glyph.LineTo(pt.X,pt.Y);
}else if (prevPoint.OnCurve && !pt.OnCurve){
controlPoint.Set(pt);
}else if(!prevPoint.OnCurve && !pt.OnCurve){
float midPointX=(prevPoint.X+pt.X)/2f;
float midPointY=(prevPoint.Y+pt.Y)/2f;
glyph.QuadraticCurveTo(prevPoint.X,prevPoint.Y,midPointX,midPointY);
controlPoint.Set(pt);
}else if(!prevPoint.OnCurve && pt.OnCurve){
// Previous point off-curve, this point on-curve.
glyph.QuadraticCurveTo(controlPoint.X,controlPoint.Y,pt.X,pt.Y);
controlPoint.Active=false;
}
}
if(firstPoint!=lastPoint){
// Close the path.
if(controlPoint.Active){
// Still got a spare control point:
glyph.QuadraticCurveTo(controlPoint.X,controlPoint.Y,firstPoint.X,firstPoint.Y);
}
// Just a normal close:
glyph.ClosePath();
}
}
}
}
if(glyph.Font.WindingUnknown){
// Find the winding now:
glyph.Font.FindWinding(glyph);
}
}
private void Parse(int start, int codeLength)
{
// Seek there now:
Parser.Position = start;
// Where should the parser quit?
int max = start + codeLength;
float c1x;
float c1y;
float c2x;
float c2y;
int subIndex;
CffSubPosition subCode;
// For each bytecode..
while (Parser.Position < max)
{
// Grab the byte:
byte v = Parser.ReadByte();
switch (v)
{
case 1: // hstem
ParseStems();
break;
case 3: // vstem
ParseStems();
break;
case 4: // vmoveto
if (Stack.Length > 1 && !HasWidth)
{
Width = Stack.Shift() + NominalWidthX;
HasWidth = true;
}
Y += Stack.Shift();
Glyph.ClosePath();
// Move:
Glyph.MoveTo(X * ScaleRatio, Y * ScaleRatio);
break;
case 5: // rlineto
while (Stack.Length > 0)
{
X += Stack.Shift();
Y += Stack.Shift();
Glyph.LineTo(X * ScaleRatio, Y * ScaleRatio);
}
break;
case 6: // hlineto
while (Stack.Length > 0)
{
X += Stack.Shift();
Glyph.LineTo(X * ScaleRatio, Y * ScaleRatio);
if (Stack.Empty)
{
break;
}
Y += Stack.Shift();
Glyph.LineTo(X * ScaleRatio, Y * ScaleRatio);
}
break;
case 7: // vlineto
while (Stack.Length > 0)
{
Y += Stack.Shift();
Glyph.LineTo(X * ScaleRatio, Y * ScaleRatio);
if (Stack.Length == 0)
{
break;
}
X += Stack.Shift();
Glyph.LineTo(X * ScaleRatio, Y * ScaleRatio);
}
break;
case 8: // rrcurveto
while (Stack.Length > 0)
{
c1x = X + Stack.Shift();
c1y = Y + Stack.Shift();
c2x = c1x + Stack.Shift();
c2y = c1y + Stack.Shift();
X = c2x + Stack.Shift();
Y = c2y + Stack.Shift();
Glyph.CurveTo(c1x * ScaleRatio, c1y * ScaleRatio, c2x * ScaleRatio, c2y * ScaleRatio, X * ScaleRatio, Y * ScaleRatio);
}
break;
case 10: // callsubr
subIndex = (int)Stack.Pop() + SubrsBias;
subCode = Subrs[subIndex];
if (subCode != null)
{
// Cache the position:
subIndex = Parser.Position;
// Parse:
Parse(subCode.Position, subCode.Length);
// Re-apply:
Parser.Position = subIndex;
}
break;
case 11: // return
return;
case 12: // escape
v = Parser.ReadByte();
break;
case 14: // endchar
if (Stack.Length > 0 && !HasWidth)
{
Width = Stack.Shift() + NominalWidthX;
HasWidth = true;
}
// Close the glyph:
Glyph.ClosePath();
break;
case 18: // hstemhm
ParseStems();
break;
case 19: // hintmask
case 20: // cntrmask
ParseStems();
Parser.Position += (NStems + 7) >> 3;
break;
case 21: // rmoveto
if (Stack.Length > 2 && !HasWidth)
{
Width = Stack.Shift() + NominalWidthX;
HasWidth = true;
}
X += Stack.Shift();
Y += Stack.Shift();
Glyph.ClosePath();
// Move now:
Glyph.MoveTo(X * ScaleRatio, Y * ScaleRatio);
break;
case 22: // hmoveto
if (Stack.Length > 1 && !HasWidth)
{
Width = Stack.Shift() + NominalWidthX;
HasWidth = true;
}
X += Stack.Shift();
Glyph.ClosePath();
// Move now:
Glyph.MoveTo(X * ScaleRatio, Y * ScaleRatio);
break;
case 23: // vstemhm
ParseStems();
break;
case 24: // rcurveline
while (Stack.Length > 2)
{
c1x = X + Stack.Shift();
c1y = Y + Stack.Shift();
c2x = c1x + Stack.Shift();
c2y = c1y + Stack.Shift();
X = c2x + Stack.Shift();
Y = c2y + Stack.Shift();
Glyph.CurveTo(c1x * ScaleRatio, c1y * ScaleRatio, c2x * ScaleRatio, c2y * ScaleRatio, X * ScaleRatio, Y * ScaleRatio);
}
X += Stack.Shift();
Y += Stack.Shift();
Glyph.LineTo(X * ScaleRatio, Y * ScaleRatio);
break;
case 25: // rlinecurve
while (Stack.Length > 6)
{
X += Stack.Shift();
Y += Stack.Shift();
Glyph.LineTo(X * ScaleRatio, Y * ScaleRatio);
}
c1x = X + Stack.Shift();
c1y = Y + Stack.Shift();
c2x = c1x + Stack.Shift();
c2y = c1y + Stack.Shift();
X = c2x + Stack.Shift();
Y = c2y + Stack.Shift();
Glyph.CurveTo(c1x * ScaleRatio, c1y * ScaleRatio, c2x * ScaleRatio, c2y * ScaleRatio, X * ScaleRatio, Y * ScaleRatio);
break;
case 26: // vvcurveto
if (Stack.IsOdd)
{
X += Stack.Shift();
}
while (Stack.Length > 0)
{
c1x = X;
c1y = Y + Stack.Shift();
c2x = c1x + Stack.Shift();
c2y = c1y + Stack.Shift();
X = c2x;
Y = c2y + Stack.Shift();
Glyph.CurveTo(c1x * ScaleRatio, c1y * ScaleRatio, c2x * ScaleRatio, c2y * ScaleRatio, X * ScaleRatio, Y * ScaleRatio);
}
break;
case 27: // hhcurveto
if (Stack.IsOdd)
{
Y += Stack.Shift();
}
while (Stack.Length > 0)
{
c1x = X + Stack.Shift();
c1y = Y;
c2x = c1x + Stack.Shift();
c2y = c1y + Stack.Shift();
X = c2x + Stack.Shift();
Y = c2y;
Glyph.CurveTo(c1x * ScaleRatio, c1y * ScaleRatio, c2x * ScaleRatio, c2y * ScaleRatio, X * ScaleRatio, Y * ScaleRatio);
}
break;
case 28: // shortint
Stack.Push(Parser.ReadInt16());
break;
case 29: // callgsubr
subIndex = (int)Stack.Pop() + GsubrsBias;
subCode = GSubrs[subIndex];
if (subCode != null)
{
// Cache the position:
subIndex = Parser.Position;
// Parse:
Parse(subCode.Position, subCode.Length);
// Re-apply:
Parser.Position = subIndex;
}
break;
case 30: // vhcurveto
while (Stack.Length > 0)
{
c1x = X;
c1y = Y + Stack.Shift();
c2x = c1x + Stack.Shift();
c2y = c1y + Stack.Shift();
X = c2x + Stack.Shift();
Y = c2y + (Stack.Length == 1?Stack.Shift():0);
Glyph.CurveTo(c1x * ScaleRatio, c1y * ScaleRatio, c2x * ScaleRatio, c2y * ScaleRatio, X * ScaleRatio, Y * ScaleRatio);
if (Stack.Empty)
{
break;
}
c1x = X + Stack.Shift();
c1y = Y;
c2x = c1x + Stack.Shift();
c2y = c1y + Stack.Shift();
Y = c2y + Stack.Shift();
X = c2x + (Stack.Length == 1?Stack.Shift():0);
Glyph.CurveTo(c1x * ScaleRatio, c1y * ScaleRatio, c2x * ScaleRatio, c2y * ScaleRatio, X * ScaleRatio, Y * ScaleRatio);
}
break;
case 31: // hvcurveto
while (Stack.Length > 0)
{
c1x = X + Stack.Shift();
c1y = Y;
c2x = c1x + Stack.Shift();
c2y = c1y + Stack.Shift();
Y = c2y + Stack.Shift();
X = c2x + (Stack.Length == 1 ? Stack.Shift() : 0);
Glyph.CurveTo(c1x * ScaleRatio, c1y * ScaleRatio, c2x * ScaleRatio, c2y * ScaleRatio, X * ScaleRatio, Y * ScaleRatio);
if (Stack.Empty)
{
break;
}
c1x = X;
c1y = Y + Stack.Shift();
c2x = c1x + Stack.Shift();
c2y = c1y + Stack.Shift();
X = c2x + Stack.Shift();
Y = c2y + (Stack.Length == 1?Stack.Shift():0);
Glyph.CurveTo(c1x * ScaleRatio, c1y * ScaleRatio, c2x * ScaleRatio, c2y * ScaleRatio, X * ScaleRatio, Y * ScaleRatio);
}
break;
default:
if (v < 32)
{
// Faulty operator.
return;
}
else if (v < 247)
{
Stack.Push(v - 139);
}
else if (v < 251)
{
Stack.Push((v - 247) * 256 + Parser.ReadByte() + 108);
}
else if (v < 255)
{
Stack.Push(-(v - 251) * 256 - Parser.ReadByte() - 108);
}
else
{
Stack.Push((float)Parser.ReadInt32() / 65536f);
}
break;
}
}
}
private static void LoadGlyph(Glyph glyph, int contourCount, FontParser parser, float range)
{
// The contour count (tiny set):
ushort[] endPointIndices = new ushort[contourCount];
// Load each endpoint:
for (int i = 0; i < contourCount; i++)
{
endPointIndices[i] = parser.ReadUInt16();
}
// How big is the instruction block?
int instructionLength = parser.ReadUInt16();
// And skip it!
parser.Position += instructionLength;
// How many coordinates?
int numberOfCoordinates = endPointIndices[endPointIndices.Length - 1] + 1;
// Create the flag set:
byte[] flags = new byte[numberOfCoordinates];
// For each one..
for (int i = 0; i < numberOfCoordinates; i++)
{
byte flag = parser.ReadByte();
flags[i] = flag;
// If bit 3 is set, we repeat this flag n times, where n is the next byte.
if ((flag & 8) > 0)
{
int repeatCount = parser.ReadByte();
for (int j = 0; j < repeatCount; j += 1)
{
i++;
flags[i] = flag;
}
}
}
if (endPointIndices.Length > 0)
{
// X/Y coordinates are relative to the previous point, except for the first point which is relative to 0,0.
if (numberOfCoordinates > 0)
{
// Current coord:
int coord = 0;
// Coord index:
int coordIndex = 0;
// The coord set:
float[] coords = new float[numberOfCoordinates * 2];
// Load X coords:
for (int i = 0; i < numberOfCoordinates; i++)
{
byte flag = flags[i];
coord = LoadGlyphCoordinate(parser, flag, coord, 2, 16);
coords[coordIndex] = (float)coord / range;
coordIndex += 2;
}
// Reset shared vars:
coord = 0;
coordIndex = 1;
// Load Y coords:
for (int i = 0; i < numberOfCoordinates; i++)
{
byte flag = flags[i];
coord = LoadGlyphCoordinate(parser, flag, coord, 4, 32);
coords[coordIndex] = (float)coord / range;
coordIndex += 2;
}
int[] orderedEnds = new int[endPointIndices.Length];
int currentEnd = 0;
for (int i = 0; i < numberOfCoordinates; i++)
{
// Grab the flag:
byte flag = flags[i];
// On curve flag - Control point otherwise:
flag = (byte)(flag & 1);
// Last point of the current contour?
// For each end point index (tiny set - better than hash):
for (int e = endPointIndices.Length - 1; e >= 0; e--)
{
if (endPointIndices[e] == i)
{
orderedEnds[currentEnd] = i;
currentEnd++;
break;
}
}
// Update the flag - it's now just a 1 or 0:
flags[i] = flag;
}
// Reset shared index again:
coordIndex = 0;
// Create our temp holders of point info:
GlyphPoint firstPointRaw = new GlyphPoint(flags, coords);
GlyphPoint lastPointRaw = new GlyphPoint(flags, coords);
GlyphPoint prevPointRaw = new GlyphPoint(flags, coords);
GlyphPoint currentPointRaw = new GlyphPoint(flags, coords);
GlyphPoint controlPoint = new GlyphPoint(flags, coords);
// For each contour..
for (int i = 0; i < contourCount; i++)
{
int pointOffset = 0;
// Get the indices of the first/last points on this contour.
int firstIndex = 0;
int lastIndex = orderedEnds[i];
if (i != 0)
{
firstIndex = orderedEnds[i - 1] + 1;
}
GlyphPoint firstPoint = firstPointRaw;
firstPoint.Set(firstIndex);
GlyphPoint lastPoint = lastPointRaw;
lastPoint.Set(lastIndex);
if (firstPoint.OnCurve)
{
// No control point:
controlPoint.Active = false;
// The first point will be consumed by the moveTo command so skip it:
pointOffset = 1;
}
else
{
if (lastPoint.OnCurve)
{
// If the first point is off-curve and the last point is on-curve,
// start at the last point.
firstPoint = lastPoint;
}
else
{
// If both first and last points are off-curve, start at their middle.
firstPoint.X = (firstPoint.X + lastPoint.X) / 2f;
firstPoint.Y = (firstPoint.Y + lastPoint.Y) / 2f;
}
controlPoint.Set(firstPoint);
}
glyph.MoveTo(firstPoint.X, firstPoint.Y);
int contourStart = firstIndex + pointOffset;
for (int j = contourStart; j <= lastIndex; j++)
{
// Setup the previous point:
GlyphPoint prevPoint;
if (j == firstIndex)
{
prevPoint = firstPoint;
}
else
{
prevPoint = prevPointRaw;
prevPoint.Set(j - 1);
}
// Setup the current point:
GlyphPoint pt = currentPointRaw;
pt.Set(j);
if (prevPoint.OnCurve && pt.OnCurve)
{
// Just a line here:
glyph.LineTo(pt.X, pt.Y);
}
else if (prevPoint.OnCurve && !pt.OnCurve)
{
controlPoint.Set(pt);
}
else if (!prevPoint.OnCurve && !pt.OnCurve)
{
float midPointX = (prevPoint.X + pt.X) / 2f;
float midPointY = (prevPoint.Y + pt.Y) / 2f;
glyph.QuadraticCurveTo(prevPoint.X, prevPoint.Y, midPointX, midPointY);
controlPoint.Set(pt);
}
else if (!prevPoint.OnCurve && pt.OnCurve)
{
// Previous point off-curve, this point on-curve.
glyph.QuadraticCurveTo(controlPoint.X, controlPoint.Y, pt.X, pt.Y);
controlPoint.Active = false;
}
}
if (firstPoint != lastPoint)
{
// Close the path.
if (controlPoint.Active)
{
// Still got a spare control point:
glyph.QuadraticCurveTo(controlPoint.X, controlPoint.Y, firstPoint.X, firstPoint.Y);
}
// Just a normal close:
glyph.ClosePath();
}
}
}
}
if (glyph.Font.WindingUnknown)
{
// Find the winding now:
glyph.Font.FindWinding(glyph);
}
}
