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// Copyright 2019 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.
//go:build gofuzz
// +build gofuzz
package png
import (
"bytes"
"fmt"
)
func Fuzz(data []byte) int {
cfg, err := DecodeConfig(bytes.NewReader(data))
if err != nil {
return 0
}
if cfg.Width*cfg.Height > 1e6 {
return 0
}
img, err := Decode(bytes.NewReader(data))
if err != nil {
return 0
}
levels := []CompressionLevel{
DefaultCompression,
NoCompression,
BestSpeed,
BestCompression,
}
for _, l := range levels {
var w bytes.Buffer
e := &Encoder{CompressionLevel: l}
err = e.Encode(&w, img)
if err != nil {
panic(err)
}
img1, err := Decode(&w)
if err != nil {
panic(err)
}
got := img1.Bounds()
want := img.Bounds()
if !got.Eq(want) {
fmt.Printf("bounds0: %#v\n", want)
fmt.Printf("bounds1: %#v\n", got)
panic("bounds have changed")
}
}
return 1
}
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