3 Commits

Author	SHA1	Message	Date
Nigel Tao	df2aa51d44	draw: tweak the YCbCr to RGBA conversion formula again. ... This is the golang.org/x equivalent of the golang.org/cl/36732 change to the standard library. Change-Id: I71c09a72e24c8e1c013769a6fed8f9a031724d9d Reviewed-on: https://go-review.googlesource.com/36733 Run-TryBot: Nigel Tao <nigeltao@golang.org> Reviewed-by: Rob Pike <r@golang.org>	2017-02-10 23:08:06 +00:00
Nigel Tao	6b7a488d1e	draw: tweak the YCbCr to RGBA conversion formula. ... This is the golang.org/x equivalent of the golang.org/cl/12220 change to the standard library. Change-Id: I220d1398902dec374472ef5b08db8501607cc971 Reviewed-on: https://go-review.googlesource.com/12222 Reviewed-by: Rob Pike <r@golang.org>	2015-07-15 05:30:06 +00:00
Nigel Tao	96b77d5c7a	draw: new package, a superset of the standard library's image/draw ... package, including the ability to scale an image. Design discussion: https://groups.google.com/forum/#!topic/golang-dev/B7-OrWdheic Previous code review (when Go used hg instead of git): https://codereview.appspot.com/101670045 New benchmarks: BenchmarkScaleLargeDownNN 300 5935174 ns/op BenchmarkScaleLargeDownAB 100 14482372 ns/op BenchmarkScaleLargeDownBL 1 1383805986 ns/op BenchmarkScaleLargeDownCR 1 2724631789 ns/op BenchmarkScaleDownNN 1000 1850500 ns/op BenchmarkScaleDownAB 300 4413499 ns/op BenchmarkScaleDownBL 50 30498748 ns/op BenchmarkScaleDownCR 20 58349653 ns/op BenchmarkScaleUpNN 20 92306475 ns/op BenchmarkScaleUpAB 5 220103753 ns/op BenchmarkScaleUpBL 10 122635195 ns/op BenchmarkScaleUpCR 10 183275927 ns/op Change-Id: I69d397e68897bae024c7b330a9375fa3e7688591 Reviewed-on: https://go-review.googlesource.com/4210 Reviewed-by: Rob Pike <r@golang.org>	2015-02-17 23:20:02 +00:00