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image/jpeg: use strings.Builder

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Change-Id: I0a51aa9e7800689c123ce3eaf74742a4641b7681
Reviewed-on: https://go-review.googlesource.com/c/go/+/428261
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
cuiweixie 2022-09-04 18:02:06 +08:00 committed by Gopher Robot
parent 07b19bf5ab
commit c35bc69c97
3 changed files with 5 additions and 4 deletions
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4
src/image/jpeg/dct_test.go
View File

@ -5,10 +5,10 @@
package jpeg
import (
"bytes"
"fmt"
"math"
"math/rand"
"strings"
"testing"
)
@ -181,7 +181,7 @@ func slowIDCT(b *block) {
}
func (b *block) String() string {
s := bytes.NewBuffer(nil)
s := &strings.Builder{}
fmt.Fprintf(s, "{\n")
for y := 0; y < 8; y++ {
fmt.Fprintf(s, "\t")

2
src/image/jpeg/reader_test.go
View File

@ -177,7 +177,7 @@ func check(bounds image.Rectangle, pix0, pix1 []byte, stride0, stride1 int) erro
}
func pixString(pix []byte, stride, x, y int) string {
s := bytes.NewBuffer(nil)
s := &strings.Builder{}
for j := 0; j < 8; j++ {
fmt.Fprintf(s, "\t")
for i := 0; i < 8; i++ {

3
src/image/jpeg/writer_test.go
View File

@ -13,6 +13,7 @@ import (
"io"
"math/rand"
"os"
"strings"
"testing"
)
@ -82,7 +83,7 @@ func TestUnscaledQuant(t *testing.T) {
}
if bad {
names := [nQuantIndex]string{"Luminance", "Chrominance"}
buf := &bytes.Buffer{}
buf := &strings.Builder{}
for i, name := range names {
fmt.Fprintf(buf, "// %s.\n{\n", name)
for zig := 0; zig < blockSize; zig++ {