二维绘图

• Coordinates
  • 2D Linear Transform
    • scale
    • translate
    • rotation
    • skew
  • Matrix Representation
    • x' = T x
    • composable
• Vector
  • Line
    • Color
    • Width
    • LineCap
  • Multiline: Triangle / Rect / Polygon
    • Path
    • LineJoin
  • Circle, Ellipse
• Text
  • Font
  • Glyph
  • Weight (often in pound / pt)
  • Baseline
• Drawing API - high level
  • Browser: HTMLCanvasElement
  • Android: Canvas
  • iOS: CGContext
• Drawing API - low level
  • OpenGL / OpenGL ES