public static IEnumerable <SvgPathSegment> Create(SvgPathSegment lastSegment, string commandString, SvgConverter conv)
{
if (!conv.TrySplitValues(commandString.Substring(1), out var values, false))
{
yield break;
}
int valuePos = 0;
while (valuePos < values.Length)
{
var start = new Pnt2d();
if (lastSegment != null)
{
start = lastSegment.End;
}
double rx = values[0] * conv.Scale;
double ry = values[1] * conv.Scale;
double angle = values[2];
SvgArcSize size = values[3] == 0 ? SvgArcSize.Small : SvgArcSize.Large;
SvgArcSweep sweep = values[4] == 0 ? SvgArcSweep.Negative : SvgArcSweep.Positive;
Pnt2d end = new Pnt2d(values[5] * conv.Scale, values[6] * conv.Scale);
if (char.IsLower(commandString[0]))
{
end += start;
}
valuePos += 7;
lastSegment = new SvgPathSegArc(start, rx, ry, angle, size, sweep, end);
yield return(lastSegment);
}
}
public static IEnumerable <SvgPathSegment> Create(SvgPathSegment lastSegment, string commandString, SvgConverter conv)
{
if (!conv.TrySplitValues(commandString.Substring(1), out var values, true))
{
yield break;
}
int valuePos = 0;
while (valuePos < values.Length)
{
var start = lastSegment?.End ?? Pnt2d.Origin;
Pnt2d c1;
Pnt2d c2;
Pnt2d end;
if (char.ToLower(commandString[0]) == 'c')
{
c1 = new Pnt2d(values[valuePos], values[valuePos + 1]);
c2 = new Pnt2d(values[valuePos + 2], values[valuePos + 3]);
end = new Pnt2d(values[valuePos + 4], values[valuePos + 5]);
valuePos += 6;
if (char.IsLower(commandString[0]))
{
c1 += start;
c2 += start;
end += start;
}
lastSegment = new SvgPathSegCurvetoCubic(start, c1, c2, end);
yield return(lastSegment);
}
else if (char.ToLower(commandString[0]) == 's')
{
c2 = new Pnt2d(values[valuePos], values[valuePos + 1]);
end = new Pnt2d(values[valuePos + 2], values[valuePos + 3]);
valuePos += 4;
if (char.IsLower(commandString[0]))
{
c2 += start;
end += start;
}
if (lastSegment is SvgPathSegCurvetoCubic lastSeg)
{
c1 = lastSeg.C2;
}
else
{
c1 = c2;
}
lastSegment = new SvgPathSegCurvetoCubic(start, c1, c2, end);
yield return(lastSegment);
}
}
}
public static IEnumerable <SvgPathSegment> Create(SvgPathSegment lastSegment, string commandString, SvgConverter conv)
{
if (!conv.TrySplitValues(commandString.Substring(1), out var values, true))
{
yield break;
}
int valuePos = 0;
while (valuePos < values.Length)
{
var start = lastSegment?.End ?? Pnt2d.Origin;
SvgPathSegLineto segment = null;
switch (commandString[0])
{
case 'L':
segment = new SvgPathSegLineto(start, new Pnt2d(values[valuePos], values[valuePos + 1]));
valuePos += 2;
break;
case 'l':
segment = new SvgPathSegLineto(start, start + new Pnt2d(values[valuePos], values[valuePos + 1]));
valuePos += 2;
break;
case 'H':
segment = new SvgPathSegLineto(start, new Pnt2d(values[valuePos], start.Y));
valuePos += 1;
break;
case 'h':
segment = new SvgPathSegLineto(start, start + new Pnt2d(values[valuePos], 0));
valuePos += 1;
break;
case 'V':
segment = new SvgPathSegLineto(start, new Pnt2d(start.X, values[valuePos]));
valuePos += 1;
break;
case 'v':
segment = new SvgPathSegLineto(start, start + new Pnt2d(0, values[valuePos]));
valuePos += 1;
break;
}
yield return(segment);
lastSegment = segment;
}
}
internal static IEnumerable <SvgTransform> Create(string transformString, SvgConverter conv)
{
var transformParts = transformString.Split(_TransformSplitChars);
for (int i = 0; i < transformParts.Length - 1; i += 2)
{
if (!conv.TrySplitValues(transformParts[i + 1], out var values, false))
{
continue;
}
SvgTransform transform;
switch (transformParts[i].ToLower().Trim())
{
case "matrix":
transform = SvgMatrixTransform.Create(values, conv);
break;
case "translate":
transform = SvgTranslateTransform.Create(values, conv);
break;
case "scale":
transform = SvgScaleTransform.Create(values, conv);
break;
case "rotate":
transform = SvgRotateTransform.Create(values, conv);
break;
case "skewx":
transform = SvgSkewXTransform.Create(values, conv);
break;
case "skewy":
transform = SvgSkewYTransform.Create(values, conv);
break;
default:
Messages.Warning($"Unknown transform type {transformParts[i]} found in SVG file.");
continue;
}
if (transform != null)
{
yield return(transform);
}
}
}
//--------------------------------------------------------------------------------------------------
void _CalculateScale(XmlReader reader, SvgConverter conv)
{
var viewBox = reader.GetAttribute("viewBox");
if (viewBox.IsNullOrWhiteSpace() || !conv.TrySplitValues(viewBox, out var viewBoxValues, false))
{
Messages.Warning("SVG document has not defined a ViewBox. The scaling may be incorrect.");
return;
}
double fScaleX = 1.0;
double fScaleY = 1.0;
if (conv.TryConvertToMillimeter(reader.GetAttribute("width"), out var width, false) &&
conv.TryConvertToMillimeter(reader.GetAttribute("height"), out var height, false))
{
fScaleX = width / viewBoxValues[2];
fScaleY = height / viewBoxValues[3];
}
public static IEnumerable <SvgPathSegment> Create(SvgPathSegment lastSegment, string commandString, SvgConverter conv)
{
if (!conv.TrySplitValues(commandString.Substring(1), out var values, true))
{
yield break;
}
bool isRelative = commandString[0] == 'm';
int valuePos = 0;
Pnt2d endPoint = new Pnt2d();
if (valuePos < values.Length)
{
endPoint = new Pnt2d(values[valuePos], values[valuePos + 1]);
if (isRelative && lastSegment != null)
{
endPoint += lastSegment.End;
}
yield return(new SvgPathSegMoveto(endPoint));
valuePos += 2;
}
// subsequent value pairs are implicit lineto's
while (valuePos < values.Length)
{
var startPoint = endPoint;
endPoint = new Pnt2d(values[valuePos], values[valuePos + 1]);
if (isRelative)
{
endPoint += startPoint;
}
yield return(new SvgPathSegLineto(startPoint, endPoint));
valuePos += 2;
}
}
