internal static SvgTransform CreateRotate(SvgAngle angle)
{
var rad = angle.ValueAsRadian;
var cos = Math.Cos(rad);
var sin = Math.Sin(rad);
return(new SvgTransform(SvgTransformType.Rotate, new SvgMatrix(cos, sin, -sin, cos, 0.0, 0.0)));
}
internal static SvgTransform CreateRotate(SvgAngle angle, float cx, float cy)
{
var rad = angle.ValueAsRadian;
var cos = Math.Cos(rad);
var sin = Math.Sin(rad);
return(new SvgTransform(SvgTransformType.Rotate, new SvgMatrix(cos, sin, -sin, cos, -cx * cos + cy * sin + cx, -cx * sin - cy * cos + cy)));
}
private static RgbColor ParseHslColorFunc(string color)
{
var ptr = new StringPtr(color);
ptr.AdvanceWhiteSpace();
var s1 = ptr.Index;
var h = SvgAngle.Parse(ptr);
if (ptr.Index == s1)
{
throw new ArgumentException(nameof(color));
}
ptr.AdvanceWhiteSpace();
if (ptr.Char != ',')
{
throw new ArgumentException(nameof(color));
}
++ptr;
ptr.AdvanceWhiteSpace();
var s2 = ptr.Index;
ptr.AdvanceInteger();
if (ptr.Index == s2)
{
throw new ArgumentException(nameof(color));
}
var s = byte.Parse(color.Substring(s2, ptr.Index - s2));
if (ptr.Char != '%')
{
throw new ArgumentException(nameof(color));
}
++ptr;
ptr.AdvanceWhiteSpace();
if (ptr.Char != ',')
{
throw new ArgumentException(nameof(color));
}
++ptr;
ptr.AdvanceWhiteSpace();
var s3 = ptr.Index;
ptr.AdvanceInteger();
if (ptr.Index == s3)
{
throw new ArgumentException(nameof(color));
}
var l = byte.Parse(color.Substring(s3, ptr.Index - s3));
if (ptr.Char != '%')
{
throw new ArgumentException(nameof(color));
}
++ptr;
ptr.AdvanceWhiteSpace();
if (ptr.Char != ')')
{
throw new ArgumentException(nameof(color));
}
return(HlsToRgb(h.ValueAsDegree, s / 100.0, l / 100.0));
}
internal static SvgTransform CreateSkewY(SvgAngle angle) => new SvgTransform(SvgTransformType.SkewY, new SvgMatrix(1.0, Math.Tan(angle.ValueAsRadian), 0.0, 1.0, 0.0, 0.0));
internal SvgTransform(SvgTransformType type, SvgMatrix matrix, SvgAngle angle)
{
this.Type = type;
this.Matrix = matrix;
this.Angle = angle;
}