1 files changed, 224 insertions, 0 deletions

diff --git a/Godeps/_workspace/src/github.com/nfnt/resize/resize_test.go b/Godeps/_workspace/src/github.com/nfnt/resize/resize_test.go
new file mode 100644
index 000000000..ee31ac494
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/nfnt/resize/resize_test.go
@@ -0,0 +1,224 @@
+package resize
+
+import (
+	"image"
+	"image/color"
+	"runtime"
+	"testing"
+)
+
+var img = image.NewGray16(image.Rect(0, 0, 3, 3))
+
+func init() {
+	runtime.GOMAXPROCS(runtime.NumCPU())
+	img.Set(1, 1, color.White)
+}
+
+func Test_Param1(t *testing.T) {
+	m := Resize(0, 0, img, NearestNeighbor)
+	if m.Bounds() != img.Bounds() {
+		t.Fail()
+	}
+}
+
+func Test_Param2(t *testing.T) {
+	m := Resize(100, 0, img, NearestNeighbor)
+	if m.Bounds() != image.Rect(0, 0, 100, 100) {
+		t.Fail()
+	}
+}
+
+func Test_ZeroImg(t *testing.T) {
+	zeroImg := image.NewGray16(image.Rect(0, 0, 0, 0))
+
+	m := Resize(0, 0, zeroImg, NearestNeighbor)
+	if m.Bounds() != zeroImg.Bounds() {
+		t.Fail()
+	}
+}
+
+func Test_CorrectResize(t *testing.T) {
+	zeroImg := image.NewGray16(image.Rect(0, 0, 256, 256))
+
+	m := Resize(60, 0, zeroImg, NearestNeighbor)
+	if m.Bounds() != image.Rect(0, 0, 60, 60) {
+		t.Fail()
+	}
+}
+
+func Test_SameColor(t *testing.T) {
+	img := image.NewRGBA(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetRGBA(x, y, color.RGBA{0x80, 0x80, 0x80, 0xFF})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := img.At(x, y).(color.RGBA)
+			if color.R != 0x80 || color.G != 0x80 || color.B != 0x80 || color.A != 0xFF {
+				t.Fail()
+			}
+		}
+	}
+}
+
+func Test_Bounds(t *testing.T) {
+	img := image.NewRGBA(image.Rect(20, 10, 200, 99))
+	out := Resize(80, 80, img, Lanczos2)
+	out.At(0, 0)
+}
+
+func Test_SameSizeReturnsOriginal(t *testing.T) {
+	img := image.NewRGBA(image.Rect(0, 0, 10, 10))
+	out := Resize(0, 0, img, Lanczos2)
+
+	if img != out {
+		t.Fail()
+	}
+
+	out = Resize(10, 10, img, Lanczos2)
+
+	if img != out {
+		t.Fail()
+	}
+}
+
+func Test_PixelCoordinates(t *testing.T) {
+	checkers := image.NewGray(image.Rect(0, 0, 4, 4))
+	checkers.Pix = []uint8{
+		255, 0, 255, 0,
+		0, 255, 0, 255,
+		255, 0, 255, 0,
+		0, 255, 0, 255,
+	}
+
+	resized := Resize(12, 12, checkers, NearestNeighbor).(*image.Gray)
+
+	if resized.Pix[0] != 255 || resized.Pix[1] != 255 || resized.Pix[2] != 255 {
+		t.Fail()
+	}
+
+	if resized.Pix[3] != 0 || resized.Pix[4] != 0 || resized.Pix[5] != 0 {
+		t.Fail()
+	}
+}
+
+func Test_ResizeWithPremultipliedAlpha(t *testing.T) {
+	img := image.NewRGBA(image.Rect(0, 0, 1, 4))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		// 0x80 = 0.5 * 0xFF.
+		img.SetRGBA(0, y, color.RGBA{0x80, 0x80, 0x80, 0x80})
+	}
+
+	out := Resize(1, 2, img, MitchellNetravali)
+
+	outputColor := out.At(0, 0).(color.NRGBA)
+	if outputColor.R != 0xFF {
+		t.Fail()
+	}
+}
+
+const (
+	// Use a small image size for benchmarks. We don't want memory performance
+	// to affect the benchmark results.
+	benchMaxX = 250
+	benchMaxY = 250
+
+	// Resize values near the original size require increase the amount of time
+	// resize spends converting the image.
+	benchWidth  = 200
+	benchHeight = 200
+)
+
+func benchRGBA(b *testing.B, interp InterpolationFunction) {
+	m := image.NewRGBA(image.Rect(0, 0, benchMaxX, benchMaxY))
+	// Initialize m's pixels to create a non-uniform image.
+	for y := m.Rect.Min.Y; y < m.Rect.Max.Y; y++ {
+		for x := m.Rect.Min.X; x < m.Rect.Max.X; x++ {
+			i := m.PixOffset(x, y)
+			m.Pix[i+0] = uint8(y + 4*x)
+			m.Pix[i+1] = uint8(y + 4*x)
+			m.Pix[i+2] = uint8(y + 4*x)
+			m.Pix[i+3] = uint8(4*y + x)
+		}
+	}
+
+	var out image.Image
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		out = Resize(benchWidth, benchHeight, m, interp)
+	}
+	out.At(0, 0)
+}
+
+// The names of some interpolation functions are truncated so that the columns
+// of 'go test -bench' line up.
+func Benchmark_Nearest_RGBA(b *testing.B) {
+	benchRGBA(b, NearestNeighbor)
+}
+
+func Benchmark_Bilinear_RGBA(b *testing.B) {
+	benchRGBA(b, Bilinear)
+}
+
+func Benchmark_Bicubic_RGBA(b *testing.B) {
+	benchRGBA(b, Bicubic)
+}
+
+func Benchmark_Mitchell_RGBA(b *testing.B) {
+	benchRGBA(b, MitchellNetravali)
+}
+
+func Benchmark_Lanczos2_RGBA(b *testing.B) {
+	benchRGBA(b, Lanczos2)
+}
+
+func Benchmark_Lanczos3_RGBA(b *testing.B) {
+	benchRGBA(b, Lanczos3)
+}
+
+func benchYCbCr(b *testing.B, interp InterpolationFunction) {
+	m := image.NewYCbCr(image.Rect(0, 0, benchMaxX, benchMaxY), image.YCbCrSubsampleRatio422)
+	// Initialize m's pixels to create a non-uniform image.
+	for y := m.Rect.Min.Y; y < m.Rect.Max.Y; y++ {
+		for x := m.Rect.Min.X; x < m.Rect.Max.X; x++ {
+			yi := m.YOffset(x, y)
+			ci := m.COffset(x, y)
+			m.Y[yi] = uint8(16*y + x)
+			m.Cb[ci] = uint8(y + 16*x)
+			m.Cr[ci] = uint8(y + 16*x)
+		}
+	}
+	var out image.Image
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		out = Resize(benchWidth, benchHeight, m, interp)
+	}
+	out.At(0, 0)
+}
+
+func Benchmark_Nearest_YCC(b *testing.B) {
+	benchYCbCr(b, NearestNeighbor)
+}
+
+func Benchmark_Bilinear_YCC(b *testing.B) {
+	benchYCbCr(b, Bilinear)
+}
+
+func Benchmark_Bicubic_YCC(b *testing.B) {
+	benchYCbCr(b, Bicubic)
+}
+
+func Benchmark_Mitchell_YCC(b *testing.B) {
+	benchYCbCr(b, MitchellNetravali)
+}
+
+func Benchmark_Lanczos2_YCC(b *testing.B) {
+	benchYCbCr(b, Lanczos2)
+}
+
+func Benchmark_Lanczos3_YCC(b *testing.B) {
+	benchYCbCr(b, Lanczos3)
+}