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全向量圖形處理系統: rect clipping 演算法和 fixed point 操作 - 林彥甫

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TWIN (Tiny Windows System

  • External frame buffer very slow

  • No significant acceleration

  • Color screen only

  • Reasonable CPU performance

Rect clipping algorithm

  • update by scanline

  • linked list

double buffering

Fixed point optimization

  • TWIN run on devices without FPU

  • matrices +, _, *, /, sqrt, sin, cos implementation

  • sqrt

    • shift and plus only
    • precision preservation

Mado

  • runs on L
  • SDL
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