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Chapter 4: Working with Graphics APIs

Chapter 4: Working with Graphics APIs. We will …. Learn relationships between Graphics and GUI API Understand a Graphics API programming framework Use the framework and apply to Tutorial 3.1. Our Source Code. Graphics API. GUI API. Operating System. The APIs of Tutorial 3.1:.

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Chapter 4: Working with Graphics APIs

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  1. Chapter 4: Working with Graphics APIs Chapter 4

  2. We will … • Learn relationships between Graphics and GUI API • Understand a Graphics API programming framework • Use the framework and apply to Tutorial 3.1 Chapter 4

  3. Our Source Code Graphics API GUI API Operating System The APIs of Tutorial 3.1: • Graphics API: • Needs GUI for window to draw in • GUI API: • Needs Operating system for events Chapter 4

  4. Supports from the APIs • Graphics API • Initialize drawing hardware • GUI API • Create Window + GUI elements (Button) • Create drawing area in Window • Graphics API draws to the drawing area created by GUI API Chapter 4

  5. Graphics API: Programming model Chapter 4

  6. Graphics API framework • Graphics Hardware Context (GHC) • Hardware buffers (e.g., pixel frame buffer) • Can be multiple buffers of different types (e.g., pixel, z, stencil, etc.) • Rendering Context (RC) • Attributes of how to turn geometry into pixels • e.g., transformation, color, lighting shading • Can have multiple RC connecting to GHC Chapter 4

  7. Programming with Graphics API Chapter 4

  8. Programming with Graphics API • A: Initialize Hardware (GHC) • B: Create RC • C: Drawing • C1: Preparations: set Rendering state: transforms, colors, etc. • C2: Send drawing command • GHC buffers are shown through GUI drawing areas Chapter 4

  9. Tutorial 3.1: OnPaint with D3D Chapter 4

  10. Tutorial 3.2: OnPaint with OGL Chapter 4

  11. Tutorial 3.1: OnCreate D3D Init Chapter 4

  12. Tutorial 3.2: OnCreate OGL Init Chapter 4

  13. GraphicsSystem abstraction … Chapter 4

  14. Using GraphicsSystem abstraction Chapter 4

  15. Tutorial 4.1: GraphicsSystem class Chapter 4

  16. Tutorial 4.1: using GraphicsSystem Chapter 4

  17. Tutorial 4.1: RectangleClass Chapter 4

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