static void SkipLine2Style(SwfStreamReader reader)
{
reader.ReadUInt16(); // Width
reader.ReadUnsignedBits(2); // StartCapStyle
var join_style = reader.ReadUnsignedBits(2);
var has_fill_flag = reader.ReadBit();
reader.ReadBit(); // NoHScaleFlag
reader.ReadBit(); // NoVScaleFlag
reader.ReadBit(); // PixelHintingFlag
reader.ReadUnsignedBits(5); // Reserved
reader.ReadBit(); // NoClose
reader.ReadUnsignedBits(2); // EndCapStyle
if (join_style == 2)
{
reader.ReadFixedPoint_8_8(); // MiterLimitFactor
}
if (has_fill_flag)
{
ReadFillStyle(reader, true); // FillStyle
}
else
{
SwfColor.Read(reader, true);
}
}
static Filter ReadConcreteFilter(BlurFilter filter, SwfStreamReader reader)
{
filter.BlurX = reader.ReadFixedPoint_16_16();
filter.BlurY = reader.ReadFixedPoint_16_16();
filter.Passes = reader.ReadUnsignedBits(5);
reader.ReadUnsignedBits(3); // reserved
return(filter);
}
// -----------------------------
// Gradient
// -----------------------------
static void SkipGradient(SwfStreamReader reader, bool with_alpha)
{
reader.ReadUnsignedBits(2); // SpreadMode
reader.ReadUnsignedBits(2); // InterpolationMode
var count = reader.ReadUnsignedBits(4);
for (var i = 0; i < count; ++i)
{
reader.ReadByte(); // Ratio
SwfColor.Read(reader, with_alpha);
}
}
// ---------------------------------------------------------------------
//
// ShapeRecords
//
// ---------------------------------------------------------------------
static void ReadShapeRecords(
SwfStreamReader reader, List <FillStyle> fill_styles,
bool allow_big_array, bool with_alpha, bool line2_type)
{
var fill_style_bits = reader.ReadUnsignedBits(4);
var line_style_bits = reader.ReadUnsignedBits(4);
while (!ReadShapeRecord(
reader, fill_styles,
ref fill_style_bits, ref line_style_bits,
allow_big_array, with_alpha, line2_type))
{
continue;
}
}
public static SwfColorTransform Read(SwfStreamReader reader, bool with_alpha)
{
var transform = SwfColorTransform.identity;
transform.HasAdd = reader.ReadBit();
transform.HasMul = reader.ReadBit();
var bits = reader.ReadUnsignedBits(4);
if (transform.HasMul)
{
transform.RMul = (short)reader.ReadSignedBits(bits);
transform.GMul = (short)reader.ReadSignedBits(bits);
transform.BMul = (short)reader.ReadSignedBits(bits);
transform.AMul = with_alpha ? (short)reader.ReadSignedBits(bits) : byte.MaxValue;
}
if (transform.HasAdd)
{
transform.RAdd = (short)reader.ReadSignedBits(bits);
transform.GAdd = (short)reader.ReadSignedBits(bits);
transform.BAdd = (short)reader.ReadSignedBits(bits);
transform.AAdd = with_alpha ? (short)reader.ReadSignedBits(bits) : (short)0;
}
reader.AlignToByte();
return(transform);
}
static Filter ReadConcreteFilter(GradientBevelFilter filter, SwfStreamReader reader)
{
var num_colors = reader.ReadByte();
filter.GradientColors = new SwfColor[num_colors];
for (var i = 0; i < num_colors; ++i)
{
filter.GradientColors[i] = SwfColor.Read(reader, true);
}
filter.GradientRatio = new byte[num_colors];
for (var i = 0; i < num_colors; ++i)
{
filter.GradientRatio[i] = reader.ReadByte();
}
filter.BlurX = reader.ReadFixedPoint_16_16();
filter.BlurY = reader.ReadFixedPoint_16_16();
filter.Angle = reader.ReadFixedPoint_16_16();
filter.Distance = reader.ReadFixedPoint_16_16();
filter.Strength = reader.ReadFixedPoint_8_8();
filter.InnerShadow = reader.ReadBit();
filter.Knockout = reader.ReadBit();
filter.CompositeSource = reader.ReadBit();
filter.OnTop = reader.ReadBit();
filter.Passes = reader.ReadUnsignedBits(4);
return(filter);
}
static void SkipCurvedEdgeShapeRecord(SwfStreamReader reader)
{
var num_bits = reader.ReadUnsignedBits(4) + 2;
reader.ReadSignedBits(num_bits); // control_delta_x
reader.ReadSignedBits(num_bits); // control_delta_y
reader.ReadSignedBits(num_bits); // anchor_delta_x
reader.ReadSignedBits(num_bits); // anchor_delta_y
}
public override uint ReadUnsignedBits(uint count)
{
var a = _first.ReadUnsignedBits(count);
var b = _second.ReadUnsignedBits(count);
if (a != b)
{
throw new Exception(string.Format("a={0}, b={1}", a, b));
}
return(a);
}
static Filter ReadConcreteFilter(GlowFilter filter, SwfStreamReader reader)
{
filter.GlowColor = SwfColor.Read(reader, true);
filter.BlurX = reader.ReadFixedPoint_16_16();
filter.BlurY = reader.ReadFixedPoint_16_16();
filter.Strength = reader.ReadFixedPoint_8_8();
filter.InnerGlow = reader.ReadBit();
filter.Knockout = reader.ReadBit();
filter.CompositeSource = reader.ReadBit();
filter.Passes = reader.ReadUnsignedBits(5);
return(filter);
}
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);
}
static void SkipStraigtEdgeShapeRecord(SwfStreamReader reader)
{
var num_bits = reader.ReadUnsignedBits(4) + 2;
var general_line_flag = reader.ReadBit();
var vert_line_flag = general_line_flag ? false : reader.ReadBit();
if (general_line_flag || !vert_line_flag)
{
reader.ReadSignedBits(num_bits); // delta_x
}
if (general_line_flag || vert_line_flag)
{
reader.ReadSignedBits(num_bits); // delta_y
}
}
static Filter ReadConcreteFilter(BevelFilter filter, SwfStreamReader reader)
{
filter.ShadowColor = SwfColor.Read(reader, true);
filter.HighlightColor = SwfColor.Read(reader, true);
filter.BlurX = reader.ReadFixedPoint_16_16();
filter.BlurY = reader.ReadFixedPoint_16_16();
filter.Angle = reader.ReadFixedPoint_16_16();
filter.Distance = reader.ReadFixedPoint_16_16();
filter.Strength = reader.ReadFixedPoint_8_8();
filter.InnerShadow = reader.ReadBit();
filter.Knockout = reader.ReadBit();
filter.CompositeSource = reader.ReadBit();
filter.OnTop = reader.ReadBit();
filter.Passes = reader.ReadUnsignedBits(4);
return(filter);
}
public static SwfRect Read(SwfStreamReader reader)
{
var bits = reader.ReadUnsignedBits(5);
var xmin = reader.ReadSignedBits(bits) / 20.0f;
var xmax = reader.ReadSignedBits(bits) / 20.0f;
var ymin = reader.ReadSignedBits(bits) / 20.0f;
var ymax = reader.ReadSignedBits(bits) / 20.0f;
reader.AlignToByte();
return(new SwfRect {
XMin = xmin,
XMax = xmax,
YMin = ymin,
YMax = ymax
});
}
public void ReadRectMustBeByteAlignedTest()
{
var etalon = new SwfRect {
XMin = 0,
XMax = 11000,
YMin = 0,
YMax = 8000
};
var mem = new MemoryStream(new byte[] { 0x78, 0x00, 0x05, 0x5f, 0x00, 0x00, 0x0f, 0xa0, 0x00, 0xb3 });
var reader = new SwfStreamReader(mem);
SwfRect rect = reader.ReadRect();
Assert.IsTrue(AreEqual(etalon, rect));
var tail = reader.ReadUnsignedBits(8);
Assert.AreEqual(0xb3, tail);
Assert.AreEqual(mem.Length, mem.Position);
}
static Filter ReadConcreteFilter(ConvolutionFilter filter, SwfStreamReader reader)
{
filter.MatrixX = reader.ReadByte();
filter.MatrixY = reader.ReadByte();
filter.Divisor = reader.ReadFloat32();
filter.Bias = reader.ReadFloat32();
filter.Matrix = new float[filter.MatrixX * filter.MatrixY];
for (var i = 0; i < filter.Matrix.Length; ++i)
{
filter.Matrix[i] = reader.ReadFloat32();
}
filter.DefaultColor = SwfColor.Read(reader, true);
reader.ReadUnsignedBits(6); // reserved
filter.Clamp = reader.ReadBit();
filter.PreserveAlpha = reader.ReadBit();
return(filter);
}
public void ReadRectMustBeByteAlignedTest()
{
var etalon = new SwfRect {
XMin = 0,
XMax = 11000,
YMin = 0,
YMax = 8000
};
var mem = new MemoryStream(new byte[] { 0x78, 0x00, 0x05, 0x5f, 0x00, 0x00, 0x0f, 0xa0, 0x00, 0xb3 });
var reader = new SwfStreamReader(mem);
SwfRect rect = reader.ReadRect();
Assert.IsTrue(AreEqual(etalon, rect));
var tail = reader.ReadUnsignedBits(8);
Assert.AreEqual(0xb3, tail);
Assert.AreEqual(mem.Length, mem.Position);
}
public void ReadUnsignedBitsTest()
{
var mem = new MemoryStream();
mem.WriteByte(0xaa);
mem.WriteByte(0xc3);
mem.Seek(0, SeekOrigin.Begin);
var reader = new SwfStreamReader(mem);
const int bits = 10;
Assert.AreEqual(0x2ab, reader.ReadUnsignedBits(bits), "Value");
Assert.AreEqual(false, reader.ReadBit(), "Bit 10");
Assert.AreEqual(false, reader.ReadBit(), "Bit 11");
Assert.AreEqual(false, reader.ReadBit(), "Bit 12");
Assert.AreEqual(false, reader.ReadBit(), "Bit 13");
Assert.AreEqual(true, reader.ReadBit(), "Bit 14");
Assert.AreEqual(true, reader.ReadBit(), "Bit 15");
Assert.AreEqual(mem.Length, mem.Position, "Should reach end of the stream");
}
public void ReadUnsignedBitsTest()
{
var mem = new MemoryStream();
mem.WriteByte(0xaa);
mem.WriteByte(0xc3);
mem.Seek(0, SeekOrigin.Begin);
var reader = new SwfStreamReader(mem);
const int bits = 10;
Assert.AreEqual(0x2ab, reader.ReadUnsignedBits(bits), "Value");
Assert.AreEqual(false, reader.ReadBit(), "Bit 10");
Assert.AreEqual(false, reader.ReadBit(), "Bit 11");
Assert.AreEqual(false, reader.ReadBit(), "Bit 12");
Assert.AreEqual(false, reader.ReadBit(), "Bit 13");
Assert.AreEqual(true, reader.ReadBit(), "Bit 14");
Assert.AreEqual(true, reader.ReadBit(), "Bit 15");
Assert.AreEqual(mem.Length, mem.Position, "Should reach end of the stream");
}
static bool ReadShapeRecord(
SwfStreamReader reader, List <FillStyle> fill_styles,
ref uint fill_style_bits, ref uint line_style_bits,
bool allow_big_array, bool with_alpha, bool line2_type)
{
var is_edge = reader.ReadBit();
if (is_edge)
{
var straight = reader.ReadBit();
if (straight)
{
SkipStraigtEdgeShapeRecord(reader);
}
else
{
SkipCurvedEdgeShapeRecord(reader);
}
return(false);
}
else
{
var state_new_styles = reader.ReadBit();
var state_line_style = reader.ReadBit();
var state_fill_style1 = reader.ReadBit();
var state_fill_style0 = reader.ReadBit();
var state_move_to = reader.ReadBit();
var is_end_shape_record =
!state_new_styles && !state_line_style &&
!state_fill_style0 && !state_fill_style1 && !state_move_to;
if (is_end_shape_record)
{
return(true);
}
else
{
if (state_move_to)
{
var move_bits = reader.ReadUnsignedBits(5);
reader.ReadSignedBits(move_bits); // move_delta_x
reader.ReadSignedBits(move_bits); // move_delta_y
}
if (state_fill_style0)
{
reader.ReadUnsignedBits(fill_style_bits); // fill_style_0
}
if (state_fill_style1)
{
reader.ReadUnsignedBits(fill_style_bits); // fill_style_1
}
if (state_line_style)
{
reader.ReadUnsignedBits(line_style_bits); // line_style
}
if (state_new_styles)
{
reader.AlignToByte();
fill_styles.AddRange(ReadFillStyles(reader, allow_big_array, with_alpha));
SkipLineStyles(reader, allow_big_array, with_alpha, line2_type);
fill_style_bits = reader.ReadUnsignedBits(4);
line_style_bits = reader.ReadUnsignedBits(4);
}
return(false);
}
}
}
