public void ReadNegativeFixedPoint16FromBitsTest()
{
var mem = new MemoryStream();
var writer = new SwfStreamWriter(mem);
const int val = -81920;
var bits = new SignedBitsCount(val).GetBits();
writer.WriteSignedBits(val, bits);
writer.FlushBits();
mem.Seek(0, SeekOrigin.Begin);
var reader = new SwfStreamReader(mem);
double actual = reader.ReadFixedPoint16(bits);
Assert.AreEqual(-1.25, actual);
}
public static SwfMatrix Read(SwfStreamReader reader, bool fill_style)
{
var matrix = SwfMatrix.identity;
var has_scale = reader.ReadBit();
if (has_scale)
{
var bits = (byte)reader.ReadUnsignedBits(5);
matrix.ScaleX = reader.ReadFixedPoint16(bits);
matrix.ScaleY = reader.ReadFixedPoint16(bits);
}
else
{
matrix.ScaleX =
matrix.ScaleY = 1.0f;
}
var has_rotate = reader.ReadBit();
if (has_rotate)
{
var bits = (byte)reader.ReadUnsignedBits(5);
matrix.RotateSkew0 = reader.ReadFixedPoint16(bits);
matrix.RotateSkew1 = reader.ReadFixedPoint16(bits);
}
else
{
matrix.RotateSkew0 =
matrix.RotateSkew1 = 0.0f;
}
var translate_bits = (byte)reader.ReadUnsignedBits(5);
matrix.TranslateX = reader.ReadSignedBits(translate_bits) / 20.0f;
matrix.TranslateY = reader.ReadSignedBits(translate_bits) / 20.0f;
reader.AlignToByte();
return(matrix);
}
public void WriteFixedPoint16FromBitsTest()
{
var mem = new MemoryStream();
var writer = new SwfStreamWriter(mem);
const int val = 0x03aa4523;
const ushort hi = val >> 16;
const ushort low = val & 0xffff;
const double expected = hi + low / 65536.0;
var bits = new SignedBitsCount(hi).GetBits() + 16;
writer.WriteFixedPoint16(expected, bits);
writer.FlushBits();
mem.Seek(0, SeekOrigin.Begin);
var reader = new SwfStreamReader(mem);
double actual = reader.ReadFixedPoint16(bits);
Assert.AreEqual(expected, actual);
}
public void ReadFixedPoint16FromBitsTest()
{
var mem = new MemoryStream();
var writer = new SwfStreamWriter(mem);
const int val = 0x03aa4523;
const ushort hi = val >> 16;
const ushort low = val & 0xffff;
const double expected = hi + low / 65536.0;
var bits = new SignedBitsCount(hi).GetBits();
writer.WriteUnsignedBits(hi, bits);
writer.WriteUnsignedBits(low, 16);
writer.FlushBits();
mem.Seek(0, SeekOrigin.Begin);
var reader = new SwfStreamReader(mem);
double actual = reader.ReadFixedPoint16(bits + 16);
Assert.AreEqual(expected, actual);
}
public void ReadNegativeFixedPoint16FromBitsTest()
{
var mem = new MemoryStream();
var writer = new SwfStreamWriter(mem);
const int val = -81920;
var bits = new SignedBitsCount(val).GetBits();
writer.WriteSignedBits(val, bits);
writer.FlushBits();
mem.Seek(0, SeekOrigin.Begin);
var reader = new SwfStreamReader(mem);
double actual = reader.ReadFixedPoint16(bits);
Assert.AreEqual(-1.25, actual);
}
