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Diffstat (limited to 'Godeps/_workspace/src/code.google.com/p/graphics-go/graphics/blur_test.go')
| -rw-r--r-- | Godeps/_workspace/src/code.google.com/p/graphics-go/graphics/blur_test.go | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/code.google.com/p/graphics-go/graphics/blur_test.go b/Godeps/_workspace/src/code.google.com/p/graphics-go/graphics/blur_test.go new file mode 100644 index 000000000..1d84fa604 --- /dev/null +++ b/Godeps/_workspace/src/code.google.com/p/graphics-go/graphics/blur_test.go @@ -0,0 +1,207 @@ +// Copyright 2011 The Graphics-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package graphics + +import ( + "code.google.com/p/graphics-go/graphics/graphicstest" + "image" + "image/color" + "testing" + + _ "image/png" +) + +var blurOneColorTests = []transformOneColorTest{ + { + "1x1-blank", 1, 1, 1, 1, + &BlurOptions{0.83, 1}, + []uint8{0xff}, + []uint8{0xff}, + }, + { + "1x1-spreadblank", 1, 1, 1, 1, + &BlurOptions{0.83, 2}, + []uint8{0xff}, + []uint8{0xff}, + }, + { + "3x3-blank", 3, 3, 3, 3, + &BlurOptions{0.83, 2}, + []uint8{ + 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, + }, + []uint8{ + 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, + }, + }, + { + "3x3-dot", 3, 3, 3, 3, + &BlurOptions{0.34, 1}, + []uint8{ + 0x00, 0x00, 0x00, + 0x00, 0xff, 0x00, + 0x00, 0x00, 0x00, + }, + []uint8{ + 0x00, 0x03, 0x00, + 0x03, 0xf2, 0x03, + 0x00, 0x03, 0x00, + }, + }, + { + "5x5-dot", 5, 5, 5, 5, + &BlurOptions{0.34, 1}, + []uint8{ + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + }, + []uint8{ + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x03, 0x00, 0x00, + 0x00, 0x03, 0xf2, 0x03, 0x00, + 0x00, 0x00, 0x03, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + }, + }, + { + "5x5-dot-spread", 5, 5, 5, 5, + &BlurOptions{0.85, 1}, + []uint8{ + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + }, + []uint8{ + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x10, 0x20, 0x10, 0x00, + 0x00, 0x20, 0x40, 0x20, 0x00, + 0x00, 0x10, 0x20, 0x10, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + }, + }, + { + "4x4-box", 4, 4, 4, 4, + &BlurOptions{0.34, 1}, + []uint8{ + 0x00, 0x00, 0x00, 0x00, + 0x00, 0xff, 0xff, 0x00, + 0x00, 0xff, 0xff, 0x00, + 0x00, 0x00, 0x00, 0x00, + }, + []uint8{ + 0x00, 0x03, 0x03, 0x00, + 0x03, 0xf8, 0xf8, 0x03, + 0x03, 0xf8, 0xf8, 0x03, + 0x00, 0x03, 0x03, 0x00, + }, + }, + { + "5x5-twodots", 5, 5, 5, 5, + &BlurOptions{0.34, 1}, + []uint8{ + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x96, 0x00, 0x96, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + }, + []uint8{ + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x02, 0x00, 0x02, 0x00, + 0x02, 0x8e, 0x04, 0x8e, 0x02, + 0x00, 0x02, 0x00, 0x02, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + }, + }, +} + +func TestBlurOneColor(t *testing.T) { + for _, oc := range blurOneColorTests { + dst := oc.newDst() + src := oc.newSrc() + opt := oc.opt.(*BlurOptions) + if err := Blur(dst, src, opt); err != nil { + t.Fatal(err) + } + + if !checkTransformTest(t, &oc, dst) { + continue + } + } +} + +func TestBlurEmpty(t *testing.T) { + empty := image.NewRGBA(image.Rect(0, 0, 0, 0)) + if err := Blur(empty, empty, nil); err != nil { + t.Fatal(err) + } +} + +func TestBlurGopher(t *testing.T) { + src, err := graphicstest.LoadImage("../testdata/gopher.png") + if err != nil { + t.Fatal(err) + } + + dst := image.NewRGBA(src.Bounds()) + if err = Blur(dst, src, &BlurOptions{StdDev: 1.1}); err != nil { + t.Fatal(err) + } + + cmp, err := graphicstest.LoadImage("../testdata/gopher-blur.png") + if err != nil { + t.Fatal(err) + } + err = graphicstest.ImageWithinTolerance(dst, cmp, 0x101) + if err != nil { + t.Fatal(err) + } +} + +func benchBlur(b *testing.B, bounds image.Rectangle) { + b.StopTimer() + + // Construct a fuzzy image. + src := image.NewRGBA(bounds) + for y := bounds.Min.Y; y < bounds.Max.Y; y++ { + for x := bounds.Min.X; x < bounds.Max.X; x++ { + src.SetRGBA(x, y, color.RGBA{ + uint8(5 * x % 0x100), + uint8(7 * y % 0x100), + uint8((7*x + 5*y) % 0x100), + 0xff, + }) + } + } + dst := image.NewRGBA(bounds) + + b.StartTimer() + for i := 0; i < b.N; i++ { + Blur(dst, src, &BlurOptions{0.84, 3}) + } +} + +func BenchmarkBlur400x400x3(b *testing.B) { + benchBlur(b, image.Rect(0, 0, 400, 400)) +} + +// Exactly twice the pixel count of 400x400. +func BenchmarkBlur400x800x3(b *testing.B) { + benchBlur(b, image.Rect(0, 0, 400, 800)) +} + +// Exactly twice the pixel count of 400x800 +func BenchmarkBlur400x1600x3(b *testing.B) { + benchBlur(b, image.Rect(0, 0, 400, 1600)) +} |