public static void WriteMatrix(this ISwfStreamWriter writer, ref SwfMatrix matrix)
{
var hasScale = matrix.HasScale;
writer.WriteBit(hasScale);
if (hasScale)
{
var sx = (int)(matrix.ScaleX * 65536.0);
var sy = (int)(matrix.ScaleY * 65536.0);
var scaleBits = new SignedBitsCount(sx, sy).GetBits();
if (scaleBits < 1)
{
scaleBits = 1;
}
writer.WriteUnsignedBits(scaleBits, 5);
writer.WriteFixedPoint16(matrix.ScaleX, scaleBits);
writer.WriteFixedPoint16(matrix.ScaleY, scaleBits);
}
var hasRotate = matrix.HasRotate;
writer.WriteBit(hasRotate);
if (hasRotate)
{
var rx = (int)(matrix.RotateSkew0 * 65536.0);
var ry = (int)(matrix.RotateSkew1 * 65536.0);
var rotateBits = new SignedBitsCount(rx, ry).GetBits();
if (rotateBits < 1)
{
rotateBits = 1;
}
writer.WriteUnsignedBits(rotateBits, 5);
writer.WriteFixedPoint16(matrix.RotateSkew0, rotateBits);
writer.WriteFixedPoint16(matrix.RotateSkew1, rotateBits);
}
var translateBits = new SignedBitsCount(matrix.TranslateX, matrix.TranslateY).GetBits();
writer.WriteUnsignedBits(translateBits, 5);
writer.WriteSignedBits(matrix.TranslateX, translateBits);
writer.WriteSignedBits(matrix.TranslateY, translateBits);
writer.FlushBits();
}