af146490bb
It is not needed due to the removal of the ctx field.
Reviewed-on: https://go-review.googlesource.com/16525
From-SVN: r229616
134 lines
3.3 KiB
Go
134 lines
3.3 KiB
Go
// Copyright 2012 The 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 image
|
|
|
|
import (
|
|
"image/color"
|
|
"testing"
|
|
)
|
|
|
|
func TestYCbCr(t *testing.T) {
|
|
rects := []Rectangle{
|
|
Rect(0, 0, 16, 16),
|
|
Rect(1, 0, 16, 16),
|
|
Rect(0, 1, 16, 16),
|
|
Rect(1, 1, 16, 16),
|
|
Rect(1, 1, 15, 16),
|
|
Rect(1, 1, 16, 15),
|
|
Rect(1, 1, 15, 15),
|
|
Rect(2, 3, 14, 15),
|
|
Rect(7, 0, 7, 16),
|
|
Rect(0, 8, 16, 8),
|
|
Rect(0, 0, 10, 11),
|
|
Rect(5, 6, 16, 16),
|
|
Rect(7, 7, 8, 8),
|
|
Rect(7, 8, 8, 9),
|
|
Rect(8, 7, 9, 8),
|
|
Rect(8, 8, 9, 9),
|
|
Rect(7, 7, 17, 17),
|
|
Rect(8, 8, 17, 17),
|
|
Rect(9, 9, 17, 17),
|
|
Rect(10, 10, 17, 17),
|
|
}
|
|
subsampleRatios := []YCbCrSubsampleRatio{
|
|
YCbCrSubsampleRatio444,
|
|
YCbCrSubsampleRatio422,
|
|
YCbCrSubsampleRatio420,
|
|
YCbCrSubsampleRatio440,
|
|
YCbCrSubsampleRatio411,
|
|
YCbCrSubsampleRatio410,
|
|
}
|
|
deltas := []Point{
|
|
Pt(0, 0),
|
|
Pt(1000, 1001),
|
|
Pt(5001, -400),
|
|
Pt(-701, -801),
|
|
}
|
|
for _, r := range rects {
|
|
for _, subsampleRatio := range subsampleRatios {
|
|
for _, delta := range deltas {
|
|
testYCbCr(t, r, subsampleRatio, delta)
|
|
}
|
|
}
|
|
if testing.Short() {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
func testYCbCr(t *testing.T, r Rectangle, subsampleRatio YCbCrSubsampleRatio, delta Point) {
|
|
// Create a YCbCr image m, whose bounds are r translated by (delta.X, delta.Y).
|
|
r1 := r.Add(delta)
|
|
m := NewYCbCr(r1, subsampleRatio)
|
|
|
|
// Test that the image buffer is reasonably small even if (delta.X, delta.Y) is far from the origin.
|
|
if len(m.Y) > 100*100 {
|
|
t.Errorf("r=%v, subsampleRatio=%v, delta=%v: image buffer is too large",
|
|
r, subsampleRatio, delta)
|
|
return
|
|
}
|
|
|
|
// Initialize m's pixels. For 422 and 420 subsampling, some of the Cb and Cr elements
|
|
// will be set multiple times. That's OK. We just want to avoid a uniform image.
|
|
for y := r1.Min.Y; y < r1.Max.Y; y++ {
|
|
for x := r1.Min.X; x < r1.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)
|
|
}
|
|
}
|
|
|
|
// Make various sub-images of m.
|
|
for y0 := delta.Y + 3; y0 < delta.Y+7; y0++ {
|
|
for y1 := delta.Y + 8; y1 < delta.Y+13; y1++ {
|
|
for x0 := delta.X + 3; x0 < delta.X+7; x0++ {
|
|
for x1 := delta.X + 8; x1 < delta.X+13; x1++ {
|
|
subRect := Rect(x0, y0, x1, y1)
|
|
sub := m.SubImage(subRect).(*YCbCr)
|
|
|
|
// For each point in the sub-image's bounds, check that m.At(x, y) equals sub.At(x, y).
|
|
for y := sub.Rect.Min.Y; y < sub.Rect.Max.Y; y++ {
|
|
for x := sub.Rect.Min.X; x < sub.Rect.Max.X; x++ {
|
|
color0 := m.At(x, y).(color.YCbCr)
|
|
color1 := sub.At(x, y).(color.YCbCr)
|
|
if color0 != color1 {
|
|
t.Errorf("r=%v, subsampleRatio=%v, delta=%v, x=%d, y=%d, color0=%v, color1=%v",
|
|
r, subsampleRatio, delta, x, y, color0, color1)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestYCbCrSlicesDontOverlap(t *testing.T) {
|
|
m := NewYCbCr(Rect(0, 0, 8, 8), YCbCrSubsampleRatio420)
|
|
names := []string{"Y", "Cb", "Cr"}
|
|
slices := [][]byte{
|
|
m.Y[:cap(m.Y)],
|
|
m.Cb[:cap(m.Cb)],
|
|
m.Cr[:cap(m.Cr)],
|
|
}
|
|
for i, slice := range slices {
|
|
want := uint8(10 + i)
|
|
for j := range slice {
|
|
slice[j] = want
|
|
}
|
|
}
|
|
for i, slice := range slices {
|
|
want := uint8(10 + i)
|
|
for j, got := range slice {
|
|
if got != want {
|
|
t.Fatalf("m.%s[%d]: got %d, want %d", names[i], j, got, want)
|
|
}
|
|
}
|
|
}
|
|
}
|