4.3 Drawing, Reading, and Copying Pixels

Pixels may be written to and read from the framebuffer using the DrawPixels  and ReadPixels  commands. CopyPixels  can be used to copy a block of pixels from one portion of the framebuffer to another.

• 4.3.1 Writing to the Stencil Buffer
• 4.3.2 Reading Pixels
  • Obtaining Pixels from the Framebuffer
  • Conversion of RGBA values
  • Conversion of Depth values
  • Pixel Transfer Operations
  • Conversion to L
  • Final Conversion
  • Placement in Client Memory
• 4.3.3 Copying Pixels
• 4.3.4 Pixel draw/read state