Documentation
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Index ¶
- func BezierCurveSegment(p1, p2, p3, p4 *geo.Point, t0, t1 float64) (geo.Point, geo.Point, geo.Point, geo.Point)
- func EscapeText(text string) string
- func FormatFloat(value float64) string
- func GetStrokeDashAttributes(strokeWidth, dashGapSize float64) (float64, float64)
- func IsSupportedExternalDoctype(document, directive []byte) bool
- func SVGID(text string) string
- func SplitPath(path string, percentage float64) (string, string, error)
- type PathCommand
- type PathCommandKind
- type SvgPathContext
- func (c *SvgPathContext) Absolute(x, y float64) *geo.Point
- func (c *SvgPathContext) C(isLowerCase bool, x1, y1, x2, y2, x3, y3 float64)
- func (c *SvgPathContext) H(isLowerCase bool, x float64)
- func (c *SvgPathContext) L(isLowerCase bool, x, y float64)
- func (c *SvgPathContext) PathCommands() []PathCommand
- func (c *SvgPathContext) PathData() string
- func (c *SvgPathContext) Relative(base *geo.Point, dx, dy float64) *geo.Point
- func (c *SvgPathContext) StartAt(p *geo.Point)
- func (c *SvgPathContext) V(isLowerCase bool, y float64)
- func (c *SvgPathContext) Z()
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func BezierCurveSegment ¶
func BezierCurveSegment(p1, p2, p3, p4 *geo.Point, t0, t1 float64) (geo.Point, geo.Point, geo.Point, geo.Point)
Given control points p1, p2, p3, p4, calculate the segment of this bezier curve from t0 -> t1 where {0 <= t0 < t1 <= 1}. Uses De Casteljau's algorithm, referenced: https://stackoverflow.com/questions/11703283/cubic-bezier-curve-segment/11704152#11704152
func EscapeText ¶
func FormatFloat ¶ added in v0.9.0
FormatFloat serializes an SVG coordinate with the same six decimal places as %f, but omits redundant trailing zeros. Keeping the original rounding is important: formatting the full float or reducing precision changes geometry.
func GetStrokeDashAttributes ¶
func IsSupportedExternalDoctype ¶ added in v0.9.0
IsSupportedExternalDoctype reports whether directive is the encoding/xml token for one canonical W3C SVG 1.0 or SVG 1.1 external DOCTYPE declaration in document's raw prolog. Requiring both inputs prevents encoding/xml's directive normalization from widening the accepted raw syntax. It accepts no internal subset and performs no DTD resolution. Callers remain responsible for enforcing that the declaration occurs at most once and before the root.
Types ¶
type PathCommand ¶ added in v0.9.0
type PathCommand struct {
Kind PathCommandKind
Control1 geo.Point
Control2 geo.Point
End geo.Point
}
PathCommand contains absolute path geometry. End is used by move, line, and cubic commands. Control1 and Control2 are additionally used by cubic commands.
type PathCommandKind ¶ added in v0.9.0
type PathCommandKind uint8
PathCommandKind identifies one of the renderer-neutral path operations produced by SvgPathContext. SvgPathContext normalizes horizontal and vertical SVG commands to PathCommandLine so consumers only need to handle absolute move, line, cubic, and close operations.
const ( PathCommandMove PathCommandKind = iota PathCommandLine PathCommandCubic PathCommandClose )
type SvgPathContext ¶
type SvgPathContext struct {
Path []geo.Intersectable
Commands []string
Start *geo.Point
Current *geo.Point
TopLeft *geo.Point
ScaleX float64
ScaleY float64
// contains filtered or unexported fields
}
func NewSVGPathContext ¶
func NewSVGPathContext(tl *geo.Point, sx, sy float64) *SvgPathContext
func (*SvgPathContext) C ¶
func (c *SvgPathContext) C(isLowerCase bool, x1, y1, x2, y2, x3, y3 float64)
func (*SvgPathContext) H ¶
func (c *SvgPathContext) H(isLowerCase bool, x float64)
func (*SvgPathContext) L ¶
func (c *SvgPathContext) L(isLowerCase bool, x, y float64)
func (*SvgPathContext) PathCommands ¶ added in v0.9.0
func (c *SvgPathContext) PathCommands() []PathCommand
PathCommands returns a defensive copy of the absolute typed path commands.
func (*SvgPathContext) PathData ¶
func (c *SvgPathContext) PathData() string
func (*SvgPathContext) StartAt ¶
func (c *SvgPathContext) StartAt(p *geo.Point)
func (*SvgPathContext) V ¶
func (c *SvgPathContext) V(isLowerCase bool, y float64)
func (*SvgPathContext) Z ¶
func (c *SvgPathContext) Z()
Source Files