ccitt: style fixes

This commit applies some style fixes raised in the "ccitt: set
bitReader default order to MSB" review.

Having nextBit return uint64, not uint32, removes some type conversions.

Removed a redundant "& 1" computation.

Updated a comment with s/LSB/MSB/, missed in the previous commit.

Restored the semantics of the "nBits" variable. Throughout the package,
there are a number of times where we use paired local variables or
paired struct fields, named "bits" and "nBits". The semantics is that
"bits"' type is uint32 or uint64 that actually holds a variable number
of bits, and "nBits" is that variable number. The previous commit,
writing MSB-first instead of LSB-first, changed the semantics (without
changing the variable name) so that one of those "nBits" variables now
held the index of the next bit, not the number of bits. This commit
restores the semantics: the shift is (7 - nBits), not just nBits.

Change-Id: I9afada9becceeb5642ce2c60eaf7bc0ede0cdd12
Reviewed-by: Horst Rutter <>
Reviewed-by: Benny Siegert <>
Run-TryBot: Benny Siegert <>
TryBot-Result: Gobot Gobot <>
2 files changed
tree: 1e41a45193e0953222fbcac8630a310a1e5e78ae
  1. .gitattributes
  2. .gitignore
  9. bmp/
  10. ccitt/
  11. cmd/
  12. codereview.cfg
  13. colornames/
  14. draw/
  15. example/
  16. font/
  17. go.mod
  18. go.sum
  19. math/
  20. riff/
  21. testdata/
  22. tiff/
  23. vector/
  24. vp8/
  25. vp8l/
  26. webp/

Go Images

This repository holds supplementary Go image libraries.


The easiest way to install is to run go get -u You can also manually git clone the repository to $GOPATH/src/

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This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see

The main issue tracker for the image repository is located at Prefix your issue with “x/image:” in the subject line, so it is easy to find.