Commit Graph

3 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
999c3975a8 draw: autogenerate impl.go.
Adding fast paths for concrete dst and src image types will be follow-up
changes.

Change-Id: Ib23e3cc46d9c7a52ebd5eddfbad09177b0b421af
Reviewed-on: https://go-review.googlesource.com/5417
Reviewed-by: Rob Pike <r@golang.org>
2015-02-24 00:55:15 +00:00
Nigel Tao
2a1231edb8 draw: factor out the Scale implementations.
This is just a copy/paste/rename in anticipation of automatically
generating fast-path code for specific dst-image types and src-image
types, a la the standard library's image/draw package.

Change-Id: If6385b347cb5e1d134b0ce841ef38ed4450a6fef
Reviewed-on: https://go-review.googlesource.com/5252
Reviewed-by: David Symonds <dsymonds@golang.org>
2015-02-20 07:27:42 +00:00