形状
- <line> 线
- <polyline> 折线
- <polygon> 路径
- <rect> 矩形
- <circle> 圆形
- <ellipse> 椭圆
style
- fill
- fill-opacity
- stroke
- stroke-opacity
- stroke-width
- opacity
rect
- width / heigth
- x / y
- rx / rx
circle
- cx / cy
- r
ellipse
- cx / cy
- rx / ry
line
- x1 / y1
- x2 / y2
polygon
- points
polyline
- points
path
- M = moveto
- L = lineto
- H = horizontal lineto
- V = vertical lineto
- C = curveto
- S = smooth curveto
- Q = quadratic Belzier curve
- T = smooth quadratic Belzier curveto
- A = elliptical Arc
- Z = closepath
滤镜
- feBlend
- feColorMatrix
- feComponentTransfer
- feComposite
- feConvolveMatrix
- feDiffuseLighting
- feDisplacementMap
- feFlood
- feGaussianBlur
- feImage
- feMerge
- feMorphology
- feOffset
- feSpecularLighting
- feTile
- feTurbulence
- feDistantLight
- fePointLight
- feSpotLight
