public static Geometry ANT_Outline_ToGeometry(ANT_Outline outline, bool flipY, Matrix4 mtx)
{
if (outline == null)
{
return(null);
}
ANTOutlineGeometry path = new ANTOutlineGeometry();
double x1, y1, x2, y2, x3, y3;
int n; // index of contour in outline
int first; // index of first point in contour
int tag; // current point's state
first = 0;
ANT_Vector_Array points = outline.points;
for (n = 0; n < outline.n_contours; n++)
{
int last; // index of last point in contour
last = outline.contours[n];
int limit = last;
outline_v_start.CopyFrom(points[first]);
outline_v_last.CopyFrom(points[last]);
outline_v_control.CopyFrom(outline_v_start);
int point_index = first;
ANT_Byte_Array tags_buf = outline.tags;
int tags_index = first;
tag = ANT.ANT_CURVE_TAG(tags_buf[tags_index + 0]);
// A contour cannot start with a cubic control point!
if (tag == ANT_CURVE_Tag.ANT_CURVE_TAG_CUBIC)
{
return(null);
}
// check first point to determine origin
if (tag == ANT_CURVE_Tag.ANT_CURVE_TAG_CONIC)
{
// first point is conic control. Yes, this happens.
if (ANT.ANT_CURVE_TAG(tags_buf[last]) == ANT_CURVE_Tag.ANT_CURVE_TAG_ON)
{
// start at last point if it is on the curve
outline_v_start.CopyFrom(outline_v_last);
limit--;
}
else
{
// if both first and last points are conic,
// start at their middle and record its position
// for closure
outline_v_start.x = (outline_v_start.x + outline_v_last.x) / 2;
outline_v_start.y = (outline_v_start.y + outline_v_last.y) / 2;
outline_v_last.CopyFrom(outline_v_start);
}
point_index--;
tags_index--;
}
x1 = ANT.ANT_int26p6_to_double(outline_v_start.x);
y1 = ANT.ANT_int26p6_to_double(outline_v_start.y);
if (flipY)
{
y1 = -y1;
}
mtx.Transform(ref x1, ref y1);
path.MoveTo(x1, y1);
while (point_index < limit)
{
point_index++;
ANT_Vector point = points[point_index];
tags_index++;
tag = ANT.ANT_CURVE_TAG(tags_buf[tags_index + 0]);
switch (tag)
{
case ANT_CURVE_Tag.ANT_CURVE_TAG_ON: // emit a single line_to
{
x1 = ANT.ANT_int26p6_to_double(point.x);
y1 = ANT.ANT_int26p6_to_double(point.y);
if (flipY)
{
y1 = -y1;
}
mtx.Transform(ref x1, ref y1);
path.LineTo(x1, y1);
continue;
}
case ANT_CURVE_Tag.ANT_CURVE_TAG_CONIC: // consume conic arcs
{
outline_v_control.x = point.x;
outline_v_control.y = point.y;
Do_Conic:
if (point_index < limit)
{
point_index++;
point = points[point_index];
tags_index++;
tag = ANT.ANT_CURVE_TAG(tags_buf[tags_index + 0]);
outline_vec.CopyFrom(point);
if (tag == ANT_CURVE_Tag.ANT_CURVE_TAG_ON)
{
x1 = ANT.ANT_int26p6_to_double(outline_v_control.x);
y1 = ANT.ANT_int26p6_to_double(outline_v_control.y);
x2 = ANT.ANT_int26p6_to_double(outline_vec.x);
y2 = ANT.ANT_int26p6_to_double(outline_vec.y);
if (flipY)
{
y1 = -y1;
y2 = -y2;
}
mtx.Transform(ref x1, ref y1);
mtx.Transform(ref x2, ref y2);
path.Сurve3(x1,
y1,
x2,
y2);
continue;
}
if (tag != ANT_CURVE_Tag.ANT_CURVE_TAG_CONIC)
{
return(null);
}
outline_v_middle.x = (outline_v_control.x + outline_vec.x) / 2;
outline_v_middle.y = (outline_v_control.y + outline_vec.y) / 2;
x1 = ANT.ANT_int26p6_to_double(outline_v_control.x);
y1 = ANT.ANT_int26p6_to_double(outline_v_control.y);
x2 = ANT.ANT_int26p6_to_double(outline_v_middle.x);
y2 = ANT.ANT_int26p6_to_double(outline_v_middle.y);
if (flipY)
{
y1 = -y1;
y2 = -y2;
}
mtx.Transform(ref x1, ref y1);
mtx.Transform(ref x2, ref y2);
path.Сurve3(x1,
y1,
x2,
y2);
outline_v_control.CopyFrom(outline_vec);
goto Do_Conic;
}
x1 = ANT.ANT_int26p6_to_double(outline_v_control.x);
y1 = ANT.ANT_int26p6_to_double(outline_v_control.y);
x2 = ANT.ANT_int26p6_to_double(outline_v_start.x);
y2 = ANT.ANT_int26p6_to_double(outline_v_start.y);
if (flipY)
{
y1 = -y1;
y2 = -y2;
}
mtx.Transform(ref x1, ref y1);
mtx.Transform(ref x2, ref y2);
path.Сurve3(x1,
y1,
x2,
y2);
goto Close;
}
default:
{
if (point_index + 1 > limit ||
ANT.ANT_CURVE_TAG(tags_buf[tags_index + 1]) != ANT_CURVE_Tag.ANT_CURVE_TAG_CUBIC)
{
return(null);
}
outline_vec1.x = points[point_index + 0].x;
outline_vec1.y = points[point_index + 0].y;
outline_vec2.x = points[point_index + 1].x;
outline_vec2.y = points[point_index + 1].y;
point_index += 2;
{
point = points[point_index];
}
tags_index += 2;
if (point_index <= limit)
{
outline_vec.CopyFrom(point);
x1 = ANT.ANT_int26p6_to_double(outline_vec1.x);
y1 = ANT.ANT_int26p6_to_double(outline_vec1.y);
x2 = ANT.ANT_int26p6_to_double(outline_vec2.x);
y2 = ANT.ANT_int26p6_to_double(outline_vec2.y);
x3 = ANT.ANT_int26p6_to_double(outline_vec.x);
y3 = ANT.ANT_int26p6_to_double(outline_vec.y);
if (flipY)
{
y1 = -y1;
y2 = -y2;
y3 = -y3;
}
mtx.Transform(ref x1, ref y1);
mtx.Transform(ref x2, ref y2);
mtx.Transform(ref x3, ref y3);
path.Сurve4(x1,
y1,
x2,
y2,
x3,
y3);
continue;
}
x1 = ANT.ANT_int26p6_to_double(outline_vec1.x);
y1 = ANT.ANT_int26p6_to_double(outline_vec1.y);
x2 = ANT.ANT_int26p6_to_double(outline_vec2.x);
y2 = ANT.ANT_int26p6_to_double(outline_vec2.y);
x3 = ANT.ANT_int26p6_to_double(outline_v_start.x);
y3 = ANT.ANT_int26p6_to_double(outline_v_start.y);
if (flipY)
{
y1 = -y1;
y2 = -y2;
y3 = -y3;
}
mtx.Transform(ref x1, ref y1);
mtx.Transform(ref x2, ref y2);
mtx.Transform(ref x3, ref y3);
path.Сurve4(x1,
y1,
x2,
y2,
x3,
y3);
goto Close;
}
}
}
path.ClosePolygon();
Close:
first = last + 1;
}
return(path);
}
