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# Appendices

Note

Contributors please include appendices as needed or appropriate with your bug fixes, feature additions and tests.

- Image file formats
  - Fully supported formats
  - Read-only formats
  - Write-only formats
  - Identify-only formats
- Text anchors
  - Specifying an anchor
  - Quick reference
  - Horizontal anchor alignment
  - Vertical anchor alignment
  - Examples
- Third-party plugins
- Writing your own image plugin
  - Example
  - The `tile` attribute
- Decoders
  - The raw decoder
  - Decoding floating point data
  - The bit decoder
- Writing your own file codec in C
  - Setup
  - Transforming
  - Cleanup
- Writing your own file codec in Python