bmp: Add support for writing bitmaps with alpha channels

This also fixes the writer test to actually compare the decoded images,
so as to make sure it is decoded properly.

Implements golang/go#25945.

Change-Id: I606887baa11b7664018313cf7d5800b2dc7622cf
Reviewed-on: https://go-review.googlesource.com/120095
Reviewed-by: Nigel Tao <nigeltao@golang.org>
Run-TryBot: Nigel Tao <nigeltao@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2 files changed
tree: 32a9d15d7fb6fc14a3e3e47eea0dc03792ce46d1
  1. .gitattributes
  2. .gitignore
  3. AUTHORS
  4. CONTRIBUTING.md
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. README.md
  9. bmp/
  10. cmd/
  11. codereview.cfg
  12. colornames/
  13. draw/
  14. example/
  15. font/
  16. math/
  17. riff/
  18. testdata/
  19. tiff/
  20. vector/
  21. vp8/
  22. vp8l/
  23. webp/
README.md

Go Images

This repository holds supplementary Go image libraries.

Download/Install

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

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.

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