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Delta Between Two Patch Sets: draw/scale_test.go

Issue 101670045: code review 101670045: go.image/draw: new package, a superset of the standard ...
Left Patch Set: diff -r e492ffa4cad4 https://code.google.com/p/go.image Created 9 years, 9 months ago
Right Patch Set: diff -r e492ffa4cad4 https://code.google.com/p/go.image Created 9 years, 8 months ago
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LEFTRIGHT
1 // Copyright 2014 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4
1 package draw 5 package draw
2 6
3 import ( 7 import (
4 "flag" 8 "flag"
5 "fmt" 9 "fmt"
6 "image" 10 "image"
7 "image/png" 11 "image/png"
8 "os" 12 "os"
9 "reflect" 13 "reflect"
10 "testing" 14 "testing"
11 15
12 _ "image/jpeg" 16 _ "image/jpeg"
13 ) 17 )
14 18
15 var genScaleFiles = flag.Bool("gen_scale_files", false, "Whether to generate the TestScaleXxx golden files.") 19 var genScaleFiles = flag.Bool("gen_scale_files", false, "Whether to generate the TestScaleXxx golden files.")
r 2014/07/08 19:44:54 s/W/w/
16 20
17 // testScale tests that scaling the source image gives the exact destination 21 // testScale tests that scaling the source image gives the exact destination
18 // image. This is to ensure that any refactoring or optimization of the scaling 22 // image. This is to ensure that any refactoring or optimization of the scaling
19 // code doesn't change the scaling behavior. Changing the actual algorithm or 23 // code doesn't change the scaling behavior. Changing the actual algorithm or
20 // kernel used by any particular quality setting will obviously change the 24 // kernel used by any particular quality setting will obviously change the
21 // resultant pixels, and in such a case, use the gen_scale_files flag to 25 // resultant pixels, and in such a case, use the gen_scale_files flag to
r 2014/07/08 19:44:54 pixels. In such a case, use ...
22 // regenerate the golden files. 26 // regenerate the golden files.
23 func testScale(t *testing.T, dstRect image.Rectangle, direction, srcFilename str ing) { 27 func testScale(t *testing.T, dstRect image.Rectangle, direction, srcFilename str ing) {
24 f, err := os.Open("../testdata/go-turns-two-" + srcFilename) 28 f, err := os.Open("../testdata/go-turns-two-" + srcFilename)
25 if err != nil { 29 if err != nil {
26 t.Fatalf("Open: %v", err) 30 t.Fatalf("Open: %v", err)
27 } 31 }
28 defer f.Close() 32 defer f.Close()
29 src, _, err := image.Decode(f) 33 src, _, err := image.Decode(f)
30 if err != nil { 34 if err != nil {
31 t.Fatalf("Decode: %v", err) 35 t.Fatalf("Decode: %v", err)
(...skipping 62 matching lines...) Expand 10 before | Expand all | Expand 10 after
94 scaler.Scale(dst, dstMin, src, srcMin) 98 scaler.Scale(dst, dstMin, src, srcMin)
95 } 99 }
96 } 100 }
97 101
98 func BenchmarkScaleDownFastest(b *testing.B) { benchScale(b, image.Rect(0, 0, 12 0, 80), FastestQuality) } 102 func BenchmarkScaleDownFastest(b *testing.B) { benchScale(b, image.Rect(0, 0, 12 0, 80), FastestQuality) }
99 func BenchmarkScaleDownDefault(b *testing.B) { benchScale(b, image.Rect(0, 0, 12 0, 80), DefaultQuality) } 103 func BenchmarkScaleDownDefault(b *testing.B) { benchScale(b, image.Rect(0, 0, 12 0, 80), DefaultQuality) }
100 func BenchmarkScaleDownNicest(b *testing.B) { benchScale(b, image.Rect(0, 0, 12 0, 80), NicestQuality) } 104 func BenchmarkScaleDownNicest(b *testing.B) { benchScale(b, image.Rect(0, 0, 12 0, 80), NicestQuality) }
101 func BenchmarkScaleUpFastest(b *testing.B) { benchScale(b, image.Rect(0, 0, 80 0, 600), FastestQuality) } 105 func BenchmarkScaleUpFastest(b *testing.B) { benchScale(b, image.Rect(0, 0, 80 0, 600), FastestQuality) }
102 func BenchmarkScaleUpDefault(b *testing.B) { benchScale(b, image.Rect(0, 0, 80 0, 600), DefaultQuality) } 106 func BenchmarkScaleUpDefault(b *testing.B) { benchScale(b, image.Rect(0, 0, 80 0, 600), DefaultQuality) }
103 func BenchmarkScaleUpNicest(b *testing.B) { benchScale(b, image.Rect(0, 0, 80 0, 600), NicestQuality) } 107 func BenchmarkScaleUpNicest(b *testing.B) { benchScale(b, image.Rect(0, 0, 80 0, 600), NicestQuality) }
LEFTRIGHT

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