public static PatternTable PatternTable(MetafileReader reader, CommandHeader commandHeader)
{
// P1: (index) pattern table index
// P2: (integer) nx, the dimension of colour array in the direction of the PATTERN SIZE width vector
// P3: (integer) ny, the dimension of colour array in the direction of the PATTERN SIZE height vector
// P4: (integer) local colour precision: valid values are as for the local colour precision parameter of CELL ARRAY.
// P5: (colour array) pattern definition
int index = reader.ReadIndex();
int nx = reader.ReadInteger();
int ny = reader.ReadInteger();
int localColorPrecision = reader.ReadInteger();
if (localColorPrecision == 0)
{
if (reader.Descriptor.ColorSelectionMode == ColorModeType.Direct)
{
localColorPrecision = reader.Descriptor.ColorPrecision;
}
else
{
localColorPrecision = reader.Descriptor.ColorIndexPrecision;
}
}
// might be either 1/2/4 or 8/16/32 here; but we want byte-sizes in ReadColor
if (localColorPrecision >= 8)
{
localColorPrecision /= 8;
}
var colors = new List <MetafileColor>();
int count = nx * ny;
while (reader.HasMoreData() && count-- > 0)
{
colors.Add(reader.ReadColor(localColorPrecision));
}
return(new PatternTable(index, nx, ny, colors.ToArray()));
}
public static MarkerColor MarkerColor(MetafileReader reader, CommandHeader commandHeader)
{
// P1: (colour) marker colour
return(new MarkerColor(reader.ReadColor()));
}
public static InterpolatedInterior InterpolatedInterior(MetafileReader reader, CommandHeader commandHeader)
{
// P1: (index) style: valid values are
// 1 parallel
// 2 elliptical
// 3 triangular
// >3 reserved for registered values
// P2: (2n(size specification)) reference geometry: see part 1, subclause 7.1 for its form.
// P3: (integer) number of stages (=m)
// P4: (real) array of m stage designators
// P5: (colour) array of k colour specifiers: k=3 for triangular, m+1 otherwise.
int style = reader.ReadIndex();
var referenceGeometry = new List <PointF>();
var stageDesignators = new List <double>();
var colorSpecifiers = new List <MetafileColor>();
// Legal values of the style parameter are positive integers. [ISO/IEC 8632-1 7.7.43]
// Values greater than 3 are reserved for future standardization and registration.
if (style >= 1 && style <= 3)
{
// parallel: the number of scalars shall be 2. The FILL REFERENCE POINT is one defining
// point of a reference line. A second defining point of the reference line is defined by
// the 2 scalars, which are respectively the x and y offset of the second point from the
// FILL REFERENCE POINT.
// elliptical: the number of scalars shall be 4. The FILL REFERENCE POINT is the centre of a
// reference ellipse. The first pair of scalars are respectively the x and y offset from
// the FILL REFERENCE POINT to the first CDP of ellipse and the second pair are
// respectively the x and y offset from the FILL REFERENCE POINT to the second
// CDP of ellipse.
// triangular: the number of scalars shall be 4. The first pair of scalars are respectively the x and
// y offset from the FILL REFERENCE POINT to the second corner of a reference
// triangle and the second pair are respectively the x and y offset from the FILL
// REFERENCE POINT to the third corner of the reference triangle. The number of
// stages shall be 0 and the list of stage designators shall be empty.
int geoCount;
if (style == 1)
{
geoCount = 2;
}
else
{
geoCount = 4;
}
for (int i = 0; i < geoCount / 2; i++)
{
double rgX = reader.ReadSizeSpecification(reader.Descriptor.InteriorStyleSpecificationMode);
double rgY = reader.ReadSizeSpecification(reader.Descriptor.InteriorStyleSpecificationMode);
referenceGeometry.Add(new PointF((float)rgX, (float)rgY));
}
int numberOfStages = reader.ReadInteger();
for (int i = 0; i < numberOfStages; i++)
{
stageDesignators.Add(reader.ReadReal());
}
int numberOfColors = style == 3 ? 3 : numberOfStages + 1;
for (int i = 0; i < numberOfColors; i++)
{
colorSpecifiers.Add(reader.ReadColor());
}
}
return(new InterpolatedInterior(style, referenceGeometry.ToArray(), stageDesignators.ToArray(), colorSpecifiers.ToArray()));
}
public static LineColor LineColor(MetafileReader reader, CommandHeader commandHeader)
{
// P1: (colour) line colour
return(new LineColor(reader.ReadColor()));
}
public static EdgeColor EdgeColor(MetafileReader reader, CommandHeader commandHeader)
{
// P1: (colour) edge colour
return(new EdgeColor(reader.ReadColor()));
}
public static FillColor FillColor(MetafileReader reader, CommandHeader commandHeader)
{
// P1: (colour) fill colour
return(new FillColor(reader.ReadColor()));
}
public static TextColor TextColor(MetafileReader reader, CommandHeader commandHeader)
{
// P1: (colour) text colour
return(new TextColor(reader.ReadColor()));
}
public static AuxiliaryColor AuxiliaryColor(MetafileReader reader, CommandHeader commandHeader)
{
// P1: (colour) auxiliary colour
return(new AuxiliaryColor(reader.ReadColor()));
}
public static CellArray CellArray(MetafileReader reader, CommandHeader commandHeader)
{
// P1: (point) corner point P
// P2: (point) corner point Q
// P3: (point) corner point R
// P4: (integer) nx
// P5: (integer) ny
// P6: (integer) local colour precision: valid values are 0, 1, 2, 4, 8, 16, 24, and 32. If the value is zero (the
// 'default colour precision indicator' value), the COLOUR (INDEX) PRECISION for the picture indicates the
// precision with which the colour list is encoded. If the value is non-zero, the precision with which the colour
// data is encoded is given by the value.
// P7: (enumerated) cell representation mode: valid values are
// 0 run length list mode
// 1 packed list mode
// P8: (colour list) array of cell colour values.
// If the COLOUR SELECTION MODE is 'direct', the values will be direct colour values. If the COLOUR
// SELECTION MODE is 'indexed', the values will be indexes into the COLOUR TABLE.
// If the cell representation mode is 'packed list', the colour values are represented by rows of values, each
// row starting on a word boundary. If the cell representation mode is 'run length', the colour list values are
// represented by rows broken into runs of constant colour; each row starts on a word boundary. Each list
// item consists of a cell count (integer) followed by a colour value. With the exception of the first run of a
// row, the integer count of each run immediately follows the colour specifier of the preceding run with no
// intervening padding.
var p = reader.ReadPoint();
var q = reader.ReadPoint();
var r = reader.ReadPoint();
int nx = reader.ReadInteger();
int ny = reader.ReadInteger();
int localColorPrecision = reader.ReadInteger();
if (localColorPrecision == 0)
{
if (reader.Descriptor.ColorSelectionMode == ColorModeType.Direct)
{
localColorPrecision = reader.Descriptor.ColorPrecision;
}
else
{
localColorPrecision = reader.Descriptor.ColorIndexPrecision;
}
}
// might be either 1/2/4 or 8/16/32 here; but we want byte-sizes in ReadColor
if (localColorPrecision >= 8)
{
localColorPrecision /= 8;
}
var cellRepresentationMode = reader.ReadEnum <CellRepresentationMode>();
int totalCount = nx * ny;
var colors = new List <MetafileColor>();
while (colors.Count < totalCount)
{
// chunks are split into rows; each row is word-aligned
// word-align the next read if necessary
if (reader.Position % 2 == 1 && reader.HasMoreData())
{
reader.ReadByte();
}
int rowCount = nx;
while (rowCount > 0)
{
if (cellRepresentationMode == CellRepresentationMode.RunLengthList)
{
int cellCount = reader.ReadInteger();
rowCount -= cellCount;
var cellColor = reader.ReadColor(localColorPrecision);
colors.AddRange(Enumerable.Range(0, cellCount).Select(i => cellColor));
}
else
{
rowCount--;
colors.Add(reader.ReadColor(localColorPrecision));
}
}
}
return(new CellArray(p, q, r, nx, ny, colors.ToArray()));
}
