Block Responsibilities: Texel Central, Pixel Processors

• Texel Central

  • Lookup and trilinearly filter texture
  • 3D texture coordinates are perspective correct
  • Expand 2D color information from bits to pixels
  • RGBA->RGBA mapping, color masking (blue screen compositing)

• 8 Pixel Processors

  • Alpha, stencil, Z tests
  • Per-pixel fog (linear, exponential, exponential2)
  • RGBA Blending, raster-ops, dithering

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