// PackByte
// Packs an op-code, and up to 4 booleans into a single byte.
//
// Binary format is :
// First 4 bits map directly to the op-code.
// Next 4 bits map to booleans 1 - 4.
//
// Like this:
//
// 7| 6 | 5 | 4 | 3 | 2 | 1 | 0 |
// <B4>|<B3>|<B2>|<B1><- Op Code ->
//
private static byte PackByte(ParserGeometryContextOpCodes opCode, bool bool1, bool bool2, bool bool3, bool bool4)
{
byte packedByte = (byte)opCode;
if (packedByte >= 16)
{
throw new ArgumentException(SR.Get(SRID.UnknownPathOperationType));
}
if (bool1)
{
packedByte |= SetBool1;
}
if (bool2)
{
packedByte |= SetBool2;
}
if (bool3)
{
packedByte |= SetBool3;
}
if (bool4)
{
packedByte |= SetBool4;
}
return(packedByte);
}
internal static void Deserialize(BinaryReader br, StreamGeometryContext sc, StreamGeometry geometry)
{
bool closed = false;
Byte currentByte;
while (!closed)
{
currentByte = br.ReadByte();
ParserGeometryContextOpCodes opCode = UnPackOpCode(currentByte);
switch (opCode)
{
case ParserGeometryContextOpCodes.FillRule:
DeserializeFillRule(br, currentByte, geometry);
break;
case ParserGeometryContextOpCodes.BeginFigure:
DeserializeBeginFigure(br, currentByte, sc);
break;
case ParserGeometryContextOpCodes.LineTo:
DeserializeLineTo(br, currentByte, sc);
break;
case ParserGeometryContextOpCodes.QuadraticBezierTo:
DeserializeQuadraticBezierTo(br, currentByte, sc);
break;
case ParserGeometryContextOpCodes.BezierTo:
DeserializeBezierTo(br, currentByte, sc);
break;
case ParserGeometryContextOpCodes.PolyLineTo:
DeserializePolyLineTo(br, currentByte, sc);
break;
case ParserGeometryContextOpCodes.PolyQuadraticBezierTo:
DeserializePolyQuadraticBezierTo(br, currentByte, sc);
break;
case ParserGeometryContextOpCodes.PolyBezierTo:
DeserializePolyBezierTo(br, currentByte, sc);
break;
case ParserGeometryContextOpCodes.ArcTo:
DeserializeArcTo(br, currentByte, sc);
break;
case ParserGeometryContextOpCodes.Closed:
closed = true;
break;
}
}
}
// SerializeListOfPointsAndTwoBools
//
// Binary format is :
//
// <Byte+OpCode> <Count> <Number1> ... <NumberN>
//
// <Byte+OpCode> := OpCode + bool1 + bool2
// <Count> := int32
// <NumberN> := <SerializationFloatType.ScaledInteger+Integer> | <SerializationFloatTypeForSpecialNumbers> | <SerializationFloatType.Double+Double>
private void SerializeListOfPointsAndTwoBools(ParserGeometryContextOpCodes opCode, IList <Point> points, bool bool1, bool bool2)
{
// Pack the two bools into one byte
Byte packedByte = PackByte(opCode, bool1, bool2);
_bw.Write(packedByte);
// Write the count.
_bw.Write(points.Count);
// Write out all the Points
for (int i = 0; i < points.Count; i++)
{
XamlSerializationHelper.WriteDouble(_bw, points[i].X);
XamlSerializationHelper.WriteDouble(_bw, points[i].Y);
}
}
//
// SerializePointAndTwoBools
//
// Binary format is :
//
// <Byte+OpCode> <Number1> <Number2>
//
// Where :
// <Byte+OpCode> := OpCode + bool1 + bool2 + isScaledIntegerX + isScaledIntegerY
// <NumberN> := <ScaledInteger> | <SerializationFloatTypeForSpecialNumbers> | <SerializationFloatType.Double+Double>
// <SerializationFloatTypeForSpecialNumbers> := <SerializationFloatType.Zero> | <SerializationFloatType.One> | <SerializationFloatType.MinusOne>
// <SerializationFloatType.Double+Double> := <SerializationFloatType.Double> <Double>
//
// By packing the flags for isScaledInteger into the first byte - we save 2 extra bytes per number for the common case.
//
// As a result - most LineTo's (and other operations) will be stored in 9 bytes.
// Some LineTo's will be 6 (or even sometimes 3)
// Max LineTo will be 19 (two doubles).
private void SerializePointAndTwoBools(ParserGeometryContextOpCodes opCode,
Point point,
bool bool1,
bool bool2)
{
int intValueX = 0;
int intValueY = 0;
bool isScaledIntegerX, isScaledIntegerY;
isScaledIntegerX = XamlSerializationHelper.CanConvertToInteger(point.X, ref intValueX);
isScaledIntegerY = XamlSerializationHelper.CanConvertToInteger(point.Y, ref intValueY);
_bw.Write(PackByte(opCode, bool1, bool2, isScaledIntegerX, isScaledIntegerY));
SerializeDouble(point.X, isScaledIntegerX, intValueX);
SerializeDouble(point.Y, isScaledIntegerY, intValueY);
}
private static byte PackByte(ParserGeometryContextOpCodes opCode, bool bool1, bool bool2)
{
return(PackByte(opCode, bool1, bool2, false, false));
}
// PackByte
// Packs an op-code, and up to 4 booleans into a single byte.
//
// Binary format is :
// First 4 bits map directly to the op-code.
// Next 4 bits map to booleans 1 - 4.
//
// Like this:
//
// 7| 6 | 5 | 4 | 3 | 2 | 1 | 0 |
// <B4>|<B3>|<B2>|<B1><- Op Code ->
//
private static byte PackByte(ParserGeometryContextOpCodes opCode, bool bool1, bool bool2, bool bool3, bool bool4)
{
byte packedByte = (byte) opCode;
if (packedByte >= 16)
{
throw new ArgumentException(SR.Get(SRID.UnknownPathOperationType));
}
if (bool1)
{
packedByte |= SetBool1;
}
if (bool2)
{
packedByte |= SetBool2;
}
if (bool3)
{
packedByte |= SetBool3;
}
if (bool4)
{
packedByte |= SetBool4;
}
return packedByte;
}
private static byte PackByte(ParserGeometryContextOpCodes opCode, bool bool1, bool bool2)
{
return PackByte(opCode, bool1, bool2, false, false);
}
// SerializeListOfPointsAndTwoBools
//
// Binary format is :
//
// <Byte+OpCode> <Count> <Number1> ... <NumberN>
//
// <Byte+OpCode> := OpCode + bool1 + bool2
// <Count> := int32
// <NumberN> := <SerializationFloatType.ScaledInteger+Integer> | <SerializationFloatTypeForSpecialNumbers> | <SerializationFloatType.Double+Double>
private void SerializeListOfPointsAndTwoBools(ParserGeometryContextOpCodes opCode, IList<Point> points, bool bool1, bool bool2)
{
// Pack the two bools into one byte
Byte packedByte = PackByte(opCode, bool1, bool2);
_bw.Write(packedByte);
// Write the count.
_bw.Write(points.Count);
// Write out all the Points
for(int i = 0; i < points.Count; i++)
{
XamlSerializationHelper.WriteDouble(_bw, points[i].X);
XamlSerializationHelper.WriteDouble(_bw, points[i].Y);
}
}
//
// SerializePointAndTwoBools
//
// Binary format is :
//
// <Byte+OpCode> <Number1> <Number2>
//
// Where :
// <Byte+OpCode> := OpCode + bool1 + bool2 + isScaledIntegerX + isScaledIntegerY
// <NumberN> := <ScaledInteger> | <SerializationFloatTypeForSpecialNumbers> | <SerializationFloatType.Double+Double>
// <SerializationFloatTypeForSpecialNumbers> := <SerializationFloatType.Zero> | <SerializationFloatType.One> | <SerializationFloatType.MinusOne>
// <SerializationFloatType.Double+Double> := <SerializationFloatType.Double> <Double>
//
// By packing the flags for isScaledInteger into the first byte - we save 2 extra bytes per number for the common case.
//
// As a result - most LineTo's (and other operations) will be stored in 9 bytes.
// Some LineTo's will be 6 (or even sometimes 3)
// Max LineTo will be 19 (two doubles).
private void SerializePointAndTwoBools(ParserGeometryContextOpCodes opCode,
Point point,
bool bool1,
bool bool2)
{
int intValueX = 0;
int intValueY = 0;
bool isScaledIntegerX, isScaledIntegerY;
isScaledIntegerX = XamlSerializationHelper.CanConvertToInteger(point.X, ref intValueX);
isScaledIntegerY = XamlSerializationHelper.CanConvertToInteger(point.Y, ref intValueY);
_bw.Write(PackByte(opCode, bool1, bool2, isScaledIntegerX, isScaledIntegerY));
SerializeDouble(point.X, isScaledIntegerX, intValueX);
SerializeDouble(point.Y, isScaledIntegerY, intValueY);
}
