testLevelDict(t, tag, b, NoCompression, "")
		testLevelDict(t, tag, b, HuffmanOnly, "")
		for level := BestSpeed; level <= BestCompression; level++ {
			testLevelDict(t, tag, b, level, "")
		}
	}
}

func TestWriterBig(t *testing.T) {
	for i, fn := range filenames {
		testFileLevelDict(t, fn, DefaultCompression, "")
		testFileLevelDict(t, fn, NoCompression, "")
		testFileLevelDict(t, fn, HuffmanOnly, "")

	"hash"
	"hash/adler32"
	"io"
)

// These constants are copied from the flate package, so that code that imports
// "compress/zlib" does not also have to import "compress/flate".
const (
	NoCompression      = flate.NoCompression
	BestSpeed          = flate.BestSpeed
	BestCompression    = flate.BestCompression
	DefaultCompression = flate.DefaultCompression
	HuffmanOnly        = flate.HuffmanOnly
)

				i += 8
			}
		}

		// Apply the filter.
		// Skip filter for NoCompression and paletted images (cbP8) as
		// "filters are rarely useful on palette images" and will result
		// in larger files (see http://www.libpng.org/pub/png/book/chapter09.html).
		f := ftNone
		if level != zlib.NoCompression && cb != cbP8 && cb != cbP4 && cb != cbP2 && cb != cbP1 {

	"fmt"
	"hash/crc32"
	"io"
	"time"
)

// These constants are copied from the flate package, so that code that imports
// "compress/gzip" does not also have to import "compress/flate".
const (
	NoCompression      = flate.NoCompression
	BestSpeed          = flate.BestSpeed
	BestCompression    = flate.BestCompression
	DefaultCompression = flate.DefaultCompression
	HuffmanOnly        = flate.HuffmanOnly
)

		if cfg.Width*cfg.Height > 1e6 {
			return
		}
		img, typ, err := image.Decode(bytes.NewReader(b))
		if err != nil || typ != "png" {
			return
		}
		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 {

	if err := (&Encoder{}).Encode(&b1, m); err != nil {
		t.Fatal(err)
	}
	noenc := &Encoder{CompressionLevel: NoCompression}
	if err := noenc.Encode(&b2, m); err != nil {
		t.Fatal(err)
	}

	if b2.Len() <= b1.Len() {
		t.Error("DefaultCompression encoding was larger than NoCompression encoding")
	}
	if _, err := Decode(&b1); err != nil {
		t.Error("cannot decode DefaultCompression")
	}

			decompressed := bytes.NewBuffer(nil)
			if _, err := io.Copy(decompressed, r); err != nil {
				continue
			}

			if err := r.Close(); err != nil {
				continue
			}

			for _, level := range []int{NoCompression, BestSpeed, BestCompression, DefaultCompression, HuffmanOnly} {
				w, err := NewWriterLevel(io.Discard, level)
				if err != nil {
					t.Fatalf("failed to construct writer: %s", err)
				}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package flate

import (
	"errors"
	"fmt"
	"io"
	"math"
)

const (
	NoCompression      = 0
	BestSpeed          = 1
	BestCompression    = 9
	DefaultCompression = -1

	// HuffmanOnly disables Lempel-Ziv match searching and only performs Huffman

	}
	if len(b.Dests) == 0 {
		return fmt.Errorf("dest required")
	}

	// Over localhost, compression CPU can be the bottleneck. With remotes, compressing usually saves a lot of time.
	compression := gzip.NoCompression
	for _, d := range b.Dests {
		if !strings.HasPrefix(d, "localhost") {
			compression = gzip.BestSpeed
			break
		}
	}

	var images []v1.Image
	for _, args := range b.Args {

pkg image/png, const BestSpeed CompressionLevel
pkg image/png, const DefaultCompression = 0
pkg image/png, const DefaultCompression CompressionLevel
pkg image/png, const NoCompression = -1
pkg image/png, const NoCompression CompressionLevel
pkg image/png, method (*Encoder) Encode(io.Writer, image.Image) error
pkg image/png, type CompressionLevel int
pkg image/png, type Encoder struct