1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
// Copyright 2013 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 bmp
import (
"bytes"
"fmt"
"image"
"io/ioutil"
"os"
"testing"
"time"
)
func openImage(filename string) (image.Image, error) {
f, err := os.Open(testdataDir + filename)
if err != nil {
return nil, err
}
defer f.Close()
return Decode(f)
}
func TestEncode(t *testing.T) {
img0, err := openImage("video-001.bmp")
if err != nil {
t.Fatal(err)
}
buf := new(bytes.Buffer)
err = Encode(buf, img0)
if err != nil {
t.Fatal(err)
}
img1, err := Decode(buf)
if err != nil {
t.Fatal(err)
}
compare(t, img0, img1)
}
// TestZeroWidthVeryLargeHeight tests that encoding and decoding a degenerate
// image with zero width but over one billion pixels in height is faster than
// naively calling an io.Reader or io.Writer method once per row.
func TestZeroWidthVeryLargeHeight(t *testing.T) {
c := make(chan error, 1)
go func() {
b := image.Rect(0, 0, 0, 0x3fffffff)
var buf bytes.Buffer
if err := Encode(&buf, image.NewRGBA(b)); err != nil {
c <- err
return
}
m, err := Decode(&buf)
if err != nil {
c <- err
return
}
if got := m.Bounds(); got != b {
c <- fmt.Errorf("bounds: got %v, want %v", got, b)
return
}
c <- nil
}()
select {
case err := <-c:
if err != nil {
t.Fatal(err)
}
case <-time.After(3 * time.Second):
t.Fatalf("timed out")
}
}
// BenchmarkEncode benchmarks the encoding of an image.
func BenchmarkEncode(b *testing.B) {
img, err := openImage("video-001.bmp")
if err != nil {
b.Fatal(err)
}
s := img.Bounds().Size()
b.SetBytes(int64(s.X * s.Y * 4))
b.ResetTimer()
for i := 0; i < b.N; i++ {
Encode(ioutil.Discard, img)
}
}
|
