2 Commits

Author	SHA1	Message	Date
Nigel Tao	748adb17a1	draw: generate impl.go type switches. ... This just the type switches to concrete-type-specific methods. Generating RGBA- or YCbCr-specific code instead of calling the general-purpose At and Set methods will be follow-up changes. benchmark old ns/op new ns/op delta BenchmarkScaleLargeDownNN 5771212 5766160 -0.09% BenchmarkScaleLargeDownAB 14057354 14023083 -0.24% BenchmarkScaleLargeDownBL 1349968635 1347746478 -0.16% BenchmarkScaleLargeDownCR 2687753329 2678909022 -0.33% BenchmarkScaleDownNN 1802408 1808723 +0.35% BenchmarkScaleDownAB 4352978 4284878 -1.56% BenchmarkScaleDownBL 29760913 29522171 -0.80% BenchmarkScaleDownCR 57666917 56334005 -2.31% BenchmarkScaleUpNN 88886450 89235790 +0.39% BenchmarkScaleUpAB 214687758 213797857 -0.41% BenchmarkScaleUpBL 119588096 119846371 +0.22% BenchmarkScaleUpCR 179784111 180662030 +0.49% BenchmarkScaleSrcUniform 4128528 3855385 -6.62% BenchmarkScaleSrcNRGBA 13275457 13375039 +0.75% BenchmarkScaleSrcRGBA 13333672 12812895 -3.91% BenchmarkScaleSrcYCbCr 14321945 14139071 -1.28% Change-Id: I28025c3b49186a12d20ee0182a4c8ff9b036d0ae Reviewed-on: https://go-review.googlesource.com/5712 Reviewed-by: Rob Pike <r@golang.org>	2015-02-24 06:30:29 +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