734 lines
19 KiB
Go
734 lines
19 KiB
Go
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package gif
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import (
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"bytes"
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"image"
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"image/color"
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"image/color/palette"
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"image/draw"
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_ "image/png"
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"io"
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"math/rand"
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"os"
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"reflect"
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"testing"
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)
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func readImg(filename string) (image.Image, error) {
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f, err := os.Open(filename)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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m, _, err := image.Decode(f)
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return m, err
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}
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func readGIF(filename string) (*GIF, error) {
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f, err := os.Open(filename)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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return DecodeAll(f)
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}
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func delta(u0, u1 uint32) int64 {
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d := int64(u0) - int64(u1)
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if d < 0 {
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return -d
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}
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return d
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}
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// averageDelta returns the average delta in RGB space. The two images must
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// have the same bounds.
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func averageDelta(m0, m1 image.Image) int64 {
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b := m0.Bounds()
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return averageDeltaBound(m0, m1, b, b)
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}
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// averageDeltaBounds returns the average delta in RGB space. The average delta is
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// calculated in the specified bounds.
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func averageDeltaBound(m0, m1 image.Image, b0, b1 image.Rectangle) int64 {
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var sum, n int64
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for y := b0.Min.Y; y < b0.Max.Y; y++ {
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for x := b0.Min.X; x < b0.Max.X; x++ {
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c0 := m0.At(x, y)
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c1 := m1.At(x-b0.Min.X+b1.Min.X, y-b0.Min.Y+b1.Min.Y)
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r0, g0, b0, _ := c0.RGBA()
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r1, g1, b1, _ := c1.RGBA()
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sum += delta(r0, r1)
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sum += delta(g0, g1)
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sum += delta(b0, b1)
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n += 3
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}
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}
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return sum / n
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}
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// lzw.NewWriter wants an interface which is basically the same thing as gif's
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// writer interface. This ensures we're compatible.
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var _ writer = blockWriter{}
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var testCase = []struct {
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filename string
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tolerance int64
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}{
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{"../testdata/video-001.png", 1 << 12},
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{"../testdata/video-001.gif", 0},
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{"../testdata/video-001.interlaced.gif", 0},
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}
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func TestWriter(t *testing.T) {
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for _, tc := range testCase {
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m0, err := readImg(tc.filename)
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if err != nil {
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t.Error(tc.filename, err)
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continue
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}
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var buf bytes.Buffer
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err = Encode(&buf, m0, nil)
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if err != nil {
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t.Error(tc.filename, err)
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continue
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}
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m1, err := Decode(&buf)
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if err != nil {
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t.Error(tc.filename, err)
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continue
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}
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if m0.Bounds() != m1.Bounds() {
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t.Errorf("%s, bounds differ: %v and %v", tc.filename, m0.Bounds(), m1.Bounds())
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continue
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}
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// Compare the average delta to the tolerance level.
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avgDelta := averageDelta(m0, m1)
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if avgDelta > tc.tolerance {
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t.Errorf("%s: average delta is too high. expected: %d, got %d", tc.filename, tc.tolerance, avgDelta)
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continue
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}
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}
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}
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func TestSubImage(t *testing.T) {
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m0, err := readImg("../testdata/video-001.gif")
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if err != nil {
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t.Fatalf("readImg: %v", err)
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}
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m0 = m0.(*image.Paletted).SubImage(image.Rect(0, 0, 50, 30))
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var buf bytes.Buffer
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err = Encode(&buf, m0, nil)
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if err != nil {
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t.Fatalf("Encode: %v", err)
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}
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m1, err := Decode(&buf)
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if err != nil {
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t.Fatalf("Decode: %v", err)
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}
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if m0.Bounds() != m1.Bounds() {
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t.Fatalf("bounds differ: %v and %v", m0.Bounds(), m1.Bounds())
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}
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if averageDelta(m0, m1) != 0 {
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t.Fatalf("images differ")
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}
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}
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// palettesEqual reports whether two color.Palette values are equal, ignoring
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// any trailing opaque-black palette entries.
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func palettesEqual(p, q color.Palette) bool {
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n := len(p)
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if n > len(q) {
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n = len(q)
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}
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for i := 0; i < n; i++ {
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if p[i] != q[i] {
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return false
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}
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}
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for i := n; i < len(p); i++ {
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r, g, b, a := p[i].RGBA()
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if r != 0 || g != 0 || b != 0 || a != 0xffff {
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return false
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}
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}
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for i := n; i < len(q); i++ {
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r, g, b, a := q[i].RGBA()
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if r != 0 || g != 0 || b != 0 || a != 0xffff {
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return false
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}
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}
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return true
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}
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var frames = []string{
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"../testdata/video-001.gif",
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"../testdata/video-005.gray.gif",
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}
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func testEncodeAll(t *testing.T, go1Dot5Fields bool, useGlobalColorModel bool) {
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const width, height = 150, 103
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g0 := &GIF{
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Image: make([]*image.Paletted, len(frames)),
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Delay: make([]int, len(frames)),
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LoopCount: 5,
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}
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for i, f := range frames {
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g, err := readGIF(f)
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if err != nil {
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t.Fatal(f, err)
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}
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m := g.Image[0]
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if m.Bounds().Dx() != width || m.Bounds().Dy() != height {
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t.Fatalf("frame %d had unexpected bounds: got %v, want width/height = %d/%d",
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i, m.Bounds(), width, height)
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}
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g0.Image[i] = m
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}
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// The GIF.Disposal, GIF.Config and GIF.BackgroundIndex fields were added
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// in Go 1.5. Valid Go 1.4 or earlier code should still produce valid GIFs.
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//
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// On the following line, color.Model is an interface type, and
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// color.Palette is a concrete (slice) type.
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globalColorModel, backgroundIndex := color.Model(color.Palette(nil)), uint8(0)
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if useGlobalColorModel {
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globalColorModel, backgroundIndex = color.Palette(palette.WebSafe), uint8(1)
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}
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if go1Dot5Fields {
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g0.Disposal = make([]byte, len(g0.Image))
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for i := range g0.Disposal {
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g0.Disposal[i] = DisposalNone
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}
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g0.Config = image.Config{
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ColorModel: globalColorModel,
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Width: width,
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Height: height,
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}
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g0.BackgroundIndex = backgroundIndex
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}
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var buf bytes.Buffer
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if err := EncodeAll(&buf, g0); err != nil {
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t.Fatal("EncodeAll:", err)
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}
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encoded := buf.Bytes()
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config, err := DecodeConfig(bytes.NewReader(encoded))
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if err != nil {
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t.Fatal("DecodeConfig:", err)
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}
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g1, err := DecodeAll(bytes.NewReader(encoded))
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if err != nil {
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t.Fatal("DecodeAll:", err)
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}
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if !reflect.DeepEqual(config, g1.Config) {
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t.Errorf("DecodeConfig inconsistent with DecodeAll")
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}
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if !palettesEqual(g1.Config.ColorModel.(color.Palette), globalColorModel.(color.Palette)) {
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t.Errorf("unexpected global color model")
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}
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if w, h := g1.Config.Width, g1.Config.Height; w != width || h != height {
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t.Errorf("got config width * height = %d * %d, want %d * %d", w, h, width, height)
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}
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if g0.LoopCount != g1.LoopCount {
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t.Errorf("loop counts differ: %d and %d", g0.LoopCount, g1.LoopCount)
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}
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if backgroundIndex != g1.BackgroundIndex {
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t.Errorf("background indexes differ: %d and %d", backgroundIndex, g1.BackgroundIndex)
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}
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if len(g0.Image) != len(g1.Image) {
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t.Fatalf("image lengths differ: %d and %d", len(g0.Image), len(g1.Image))
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}
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if len(g1.Image) != len(g1.Delay) {
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t.Fatalf("image and delay lengths differ: %d and %d", len(g1.Image), len(g1.Delay))
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}
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if len(g1.Image) != len(g1.Disposal) {
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t.Fatalf("image and disposal lengths differ: %d and %d", len(g1.Image), len(g1.Disposal))
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}
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for i := range g0.Image {
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m0, m1 := g0.Image[i], g1.Image[i]
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if m0.Bounds() != m1.Bounds() {
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t.Errorf("frame %d: bounds differ: %v and %v", i, m0.Bounds(), m1.Bounds())
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}
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d0, d1 := g0.Delay[i], g1.Delay[i]
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if d0 != d1 {
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t.Errorf("frame %d: delay values differ: %d and %d", i, d0, d1)
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}
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p0, p1 := uint8(0), g1.Disposal[i]
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if go1Dot5Fields {
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p0 = DisposalNone
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}
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if p0 != p1 {
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t.Errorf("frame %d: disposal values differ: %d and %d", i, p0, p1)
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}
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}
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}
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func TestEncodeAllGo1Dot4(t *testing.T) { testEncodeAll(t, false, false) }
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func TestEncodeAllGo1Dot5(t *testing.T) { testEncodeAll(t, true, false) }
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func TestEncodeAllGo1Dot5GlobalColorModel(t *testing.T) { testEncodeAll(t, true, true) }
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func TestEncodeMismatchDelay(t *testing.T) {
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images := make([]*image.Paletted, 2)
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for i := range images {
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images[i] = image.NewPaletted(image.Rect(0, 0, 5, 5), palette.Plan9)
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}
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g0 := &GIF{
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Image: images,
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Delay: make([]int, 1),
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}
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if err := EncodeAll(io.Discard, g0); err == nil {
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t.Error("expected error from mismatched delay and image slice lengths")
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}
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g1 := &GIF{
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Image: images,
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Delay: make([]int, len(images)),
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Disposal: make([]byte, 1),
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}
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for i := range g1.Disposal {
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g1.Disposal[i] = DisposalNone
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}
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if err := EncodeAll(io.Discard, g1); err == nil {
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t.Error("expected error from mismatched disposal and image slice lengths")
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}
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}
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func TestEncodeZeroGIF(t *testing.T) {
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if err := EncodeAll(io.Discard, &GIF{}); err == nil {
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t.Error("expected error from providing empty gif")
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}
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}
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func TestEncodeAllFramesOutOfBounds(t *testing.T) {
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images := []*image.Paletted{
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image.NewPaletted(image.Rect(0, 0, 5, 5), palette.Plan9),
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image.NewPaletted(image.Rect(2, 2, 8, 8), palette.Plan9),
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image.NewPaletted(image.Rect(3, 3, 4, 4), palette.Plan9),
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}
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for _, upperBound := range []int{6, 10} {
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g := &GIF{
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Image: images,
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Delay: make([]int, len(images)),
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Disposal: make([]byte, len(images)),
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Config: image.Config{
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Width: upperBound,
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Height: upperBound,
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},
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}
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err := EncodeAll(io.Discard, g)
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if upperBound >= 8 {
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if err != nil {
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t.Errorf("upperBound=%d: %v", upperBound, err)
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}
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} else {
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if err == nil {
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t.Errorf("upperBound=%d: got nil error, want non-nil", upperBound)
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}
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}
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}
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}
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func TestEncodeNonZeroMinPoint(t *testing.T) {
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points := []image.Point{
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{-8, -9},
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{-4, -4},
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{-3, +3},
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{+0, +0},
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{+2, +2},
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}
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for _, p := range points {
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src := image.NewPaletted(image.Rectangle{
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Min: p,
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Max: p.Add(image.Point{6, 6}),
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}, palette.Plan9)
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var buf bytes.Buffer
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if err := Encode(&buf, src, nil); err != nil {
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t.Errorf("p=%v: Encode: %v", p, err)
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continue
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}
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m, err := Decode(&buf)
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if err != nil {
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t.Errorf("p=%v: Decode: %v", p, err)
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continue
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}
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if got, want := m.Bounds(), image.Rect(0, 0, 6, 6); got != want {
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t.Errorf("p=%v: got %v, want %v", p, got, want)
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}
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}
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// Also test having a source image (gray on the diagonal) that has a
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// non-zero Bounds().Min, but isn't an image.Paletted.
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{
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p := image.Point{+2, +2}
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src := image.NewRGBA(image.Rectangle{
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Min: p,
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Max: p.Add(image.Point{6, 6}),
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})
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src.SetRGBA(2, 2, color.RGBA{0x22, 0x22, 0x22, 0xFF})
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src.SetRGBA(3, 3, color.RGBA{0x33, 0x33, 0x33, 0xFF})
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src.SetRGBA(4, 4, color.RGBA{0x44, 0x44, 0x44, 0xFF})
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src.SetRGBA(5, 5, color.RGBA{0x55, 0x55, 0x55, 0xFF})
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src.SetRGBA(6, 6, color.RGBA{0x66, 0x66, 0x66, 0xFF})
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src.SetRGBA(7, 7, color.RGBA{0x77, 0x77, 0x77, 0xFF})
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var buf bytes.Buffer
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if err := Encode(&buf, src, nil); err != nil {
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t.Errorf("gray-diagonal: Encode: %v", err)
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return
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}
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m, err := Decode(&buf)
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if err != nil {
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t.Errorf("gray-diagonal: Decode: %v", err)
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return
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}
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if got, want := m.Bounds(), image.Rect(0, 0, 6, 6); got != want {
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t.Errorf("gray-diagonal: got %v, want %v", got, want)
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return
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}
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rednessAt := func(x int, y int) uint32 {
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r, _, _, _ := m.At(x, y).RGBA()
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// Shift by 8 to convert from 16 bit color to 8 bit color.
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return r >> 8
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}
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// Round-tripping a still (non-animated) image.Image through
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// Encode+Decode should shift the origin to (0, 0).
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if got, want := rednessAt(0, 0), uint32(0x22); got != want {
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t.Errorf("gray-diagonal: rednessAt(0, 0): got 0x%02x, want 0x%02x", got, want)
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}
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if got, want := rednessAt(5, 5), uint32(0x77); got != want {
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t.Errorf("gray-diagonal: rednessAt(5, 5): got 0x%02x, want 0x%02x", got, want)
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}
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}
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}
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func TestEncodeImplicitConfigSize(t *testing.T) {
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// For backwards compatibility for Go 1.4 and earlier code, the Config
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// field is optional, and if zero, the width and height is implied by the
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// first (and in this case only) frame's width and height.
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//
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// A Config only specifies a width and height (two integers) while an
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// image.Image's Bounds method returns an image.Rectangle (four integers).
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// For a gif.GIF, the overall bounds' top-left point is always implicitly
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// (0, 0), and any frame whose bounds have a negative X or Y will be
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// outside those overall bounds, so encoding should fail.
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for _, lowerBound := range []int{-1, 0, 1} {
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images := []*image.Paletted{
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image.NewPaletted(image.Rect(lowerBound, lowerBound, 4, 4), palette.Plan9),
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}
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g := &GIF{
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Image: images,
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Delay: make([]int, len(images)),
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}
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err := EncodeAll(io.Discard, g)
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if lowerBound >= 0 {
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if err != nil {
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t.Errorf("lowerBound=%d: %v", lowerBound, err)
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}
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} else {
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if err == nil {
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t.Errorf("lowerBound=%d: got nil error, want non-nil", lowerBound)
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}
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}
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}
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}
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func TestEncodePalettes(t *testing.T) {
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const w, h = 5, 5
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pals := []color.Palette{{
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color.RGBA{0x00, 0x00, 0x00, 0xff},
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color.RGBA{0x01, 0x00, 0x00, 0xff},
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color.RGBA{0x02, 0x00, 0x00, 0xff},
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}, {
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color.RGBA{0x00, 0x00, 0x00, 0xff},
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color.RGBA{0x00, 0x01, 0x00, 0xff},
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}, {
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color.RGBA{0x00, 0x00, 0x03, 0xff},
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color.RGBA{0x00, 0x00, 0x02, 0xff},
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color.RGBA{0x00, 0x00, 0x01, 0xff},
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color.RGBA{0x00, 0x00, 0x00, 0xff},
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}, {
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color.RGBA{0x10, 0x07, 0xf0, 0xff},
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color.RGBA{0x20, 0x07, 0xf0, 0xff},
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color.RGBA{0x30, 0x07, 0xf0, 0xff},
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color.RGBA{0x40, 0x07, 0xf0, 0xff},
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color.RGBA{0x50, 0x07, 0xf0, 0xff},
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}}
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g0 := &GIF{
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Image: []*image.Paletted{
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image.NewPaletted(image.Rect(0, 0, w, h), pals[0]),
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image.NewPaletted(image.Rect(0, 0, w, h), pals[1]),
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image.NewPaletted(image.Rect(0, 0, w, h), pals[2]),
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image.NewPaletted(image.Rect(0, 0, w, h), pals[3]),
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},
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Delay: make([]int, len(pals)),
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Disposal: make([]byte, len(pals)),
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Config: image.Config{
|
|
ColorModel: pals[2],
|
|
Width: w,
|
|
Height: h,
|
|
},
|
|
}
|
|
|
|
var buf bytes.Buffer
|
|
if err := EncodeAll(&buf, g0); err != nil {
|
|
t.Fatalf("EncodeAll: %v", err)
|
|
}
|
|
g1, err := DecodeAll(&buf)
|
|
if err != nil {
|
|
t.Fatalf("DecodeAll: %v", err)
|
|
}
|
|
if len(g0.Image) != len(g1.Image) {
|
|
t.Fatalf("image lengths differ: %d and %d", len(g0.Image), len(g1.Image))
|
|
}
|
|
for i, m := range g1.Image {
|
|
if got, want := m.Palette, pals[i]; !palettesEqual(got, want) {
|
|
t.Errorf("frame %d:\ngot %v\nwant %v", i, got, want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestEncodeBadPalettes(t *testing.T) {
|
|
const w, h = 5, 5
|
|
for _, n := range []int{256, 257} {
|
|
for _, nilColors := range []bool{false, true} {
|
|
pal := make(color.Palette, n)
|
|
if !nilColors {
|
|
for i := range pal {
|
|
pal[i] = color.Black
|
|
}
|
|
}
|
|
|
|
err := EncodeAll(io.Discard, &GIF{
|
|
Image: []*image.Paletted{
|
|
image.NewPaletted(image.Rect(0, 0, w, h), pal),
|
|
},
|
|
Delay: make([]int, 1),
|
|
Disposal: make([]byte, 1),
|
|
Config: image.Config{
|
|
ColorModel: pal,
|
|
Width: w,
|
|
Height: h,
|
|
},
|
|
})
|
|
|
|
got := err != nil
|
|
want := n > 256 || nilColors
|
|
if got != want {
|
|
t.Errorf("n=%d, nilColors=%t: err != nil: got %t, want %t", n, nilColors, got, want)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestColorTablesMatch(t *testing.T) {
|
|
const trIdx = 100
|
|
global := color.Palette(palette.Plan9)
|
|
if rgb := global[trIdx].(color.RGBA); rgb.R == 0 && rgb.G == 0 && rgb.B == 0 {
|
|
t.Fatalf("trIdx (%d) is already black", trIdx)
|
|
}
|
|
|
|
// Make a copy of the palette, substituting trIdx's slot with transparent,
|
|
// just like decoder.decode.
|
|
local := append(color.Palette(nil), global...)
|
|
local[trIdx] = color.RGBA{}
|
|
|
|
const testLen = 3 * 256
|
|
const padded = 7
|
|
e := new(encoder)
|
|
if l, err := encodeColorTable(e.globalColorTable[:], global, padded); err != nil || l != testLen {
|
|
t.Fatalf("Failed to encode global color table: got %d, %v; want nil, %d", l, err, testLen)
|
|
}
|
|
if l, err := encodeColorTable(e.localColorTable[:], local, padded); err != nil || l != testLen {
|
|
t.Fatalf("Failed to encode local color table: got %d, %v; want nil, %d", l, err, testLen)
|
|
}
|
|
if bytes.Equal(e.globalColorTable[:testLen], e.localColorTable[:testLen]) {
|
|
t.Fatal("Encoded color tables are equal, expected mismatch")
|
|
}
|
|
if !e.colorTablesMatch(len(local), trIdx) {
|
|
t.Fatal("colorTablesMatch() == false, expected true")
|
|
}
|
|
}
|
|
|
|
func TestEncodeCroppedSubImages(t *testing.T) {
|
|
// This test means to ensure that Encode honors the Bounds and Strides of
|
|
// images correctly when encoding.
|
|
whole := image.NewPaletted(image.Rect(0, 0, 100, 100), palette.Plan9)
|
|
subImages := []image.Rectangle{
|
|
image.Rect(0, 0, 50, 50),
|
|
image.Rect(50, 0, 100, 50),
|
|
image.Rect(0, 50, 50, 50),
|
|
image.Rect(50, 50, 100, 100),
|
|
image.Rect(25, 25, 75, 75),
|
|
image.Rect(0, 0, 100, 50),
|
|
image.Rect(0, 50, 100, 100),
|
|
image.Rect(0, 0, 50, 100),
|
|
image.Rect(50, 0, 100, 100),
|
|
}
|
|
for _, sr := range subImages {
|
|
si := whole.SubImage(sr)
|
|
buf := bytes.NewBuffer(nil)
|
|
if err := Encode(buf, si, nil); err != nil {
|
|
t.Errorf("Encode: sr=%v: %v", sr, err)
|
|
continue
|
|
}
|
|
if _, err := Decode(buf); err != nil {
|
|
t.Errorf("Decode: sr=%v: %v", sr, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
type offsetImage struct {
|
|
image.Image
|
|
Rect image.Rectangle
|
|
}
|
|
|
|
func (i offsetImage) Bounds() image.Rectangle {
|
|
return i.Rect
|
|
}
|
|
|
|
func TestEncodeWrappedImage(t *testing.T) {
|
|
m0, err := readImg("../testdata/video-001.gif")
|
|
if err != nil {
|
|
t.Fatalf("readImg: %v", err)
|
|
}
|
|
|
|
// Case 1: Enocde a wrapped image.Image
|
|
buf := new(bytes.Buffer)
|
|
w0 := offsetImage{m0, m0.Bounds()}
|
|
err = Encode(buf, w0, nil)
|
|
if err != nil {
|
|
t.Fatalf("Encode: %v", err)
|
|
}
|
|
w1, err := Decode(buf)
|
|
if err != nil {
|
|
t.Fatalf("Dencode: %v", err)
|
|
}
|
|
avgDelta := averageDelta(m0, w1)
|
|
if avgDelta > 0 {
|
|
t.Fatalf("Wrapped: average delta is too high. expected: 0, got %d", avgDelta)
|
|
}
|
|
|
|
// Case 2: Enocde a wrapped image.Image with offset
|
|
b0 := image.Rectangle{
|
|
Min: image.Point{
|
|
X: 128,
|
|
Y: 64,
|
|
},
|
|
Max: image.Point{
|
|
X: 256,
|
|
Y: 128,
|
|
},
|
|
}
|
|
w0 = offsetImage{m0, b0}
|
|
buf = new(bytes.Buffer)
|
|
err = Encode(buf, w0, nil)
|
|
if err != nil {
|
|
t.Fatalf("Encode: %v", err)
|
|
}
|
|
w1, err = Decode(buf)
|
|
if err != nil {
|
|
t.Fatalf("Dencode: %v", err)
|
|
}
|
|
|
|
b1 := image.Rectangle{
|
|
Min: image.Point{
|
|
X: 0,
|
|
Y: 0,
|
|
},
|
|
Max: image.Point{
|
|
X: 128,
|
|
Y: 64,
|
|
},
|
|
}
|
|
avgDelta = averageDeltaBound(m0, w1, b0, b1)
|
|
if avgDelta > 0 {
|
|
t.Fatalf("Wrapped and offset: average delta is too high. expected: 0, got %d", avgDelta)
|
|
}
|
|
}
|
|
|
|
func BenchmarkEncodeRandomPaletted(b *testing.B) {
|
|
paletted := image.NewPaletted(image.Rect(0, 0, 640, 480), palette.Plan9)
|
|
rnd := rand.New(rand.NewSource(123))
|
|
for i := range paletted.Pix {
|
|
paletted.Pix[i] = uint8(rnd.Intn(256))
|
|
}
|
|
|
|
b.SetBytes(640 * 480 * 1)
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
Encode(io.Discard, paletted, nil)
|
|
}
|
|
}
|
|
|
|
func BenchmarkEncodeRandomRGBA(b *testing.B) {
|
|
rgba := image.NewRGBA(image.Rect(0, 0, 640, 480))
|
|
bo := rgba.Bounds()
|
|
rnd := rand.New(rand.NewSource(123))
|
|
for y := bo.Min.Y; y < bo.Max.Y; y++ {
|
|
for x := bo.Min.X; x < bo.Max.X; x++ {
|
|
rgba.SetRGBA(x, y, color.RGBA{
|
|
uint8(rnd.Intn(256)),
|
|
uint8(rnd.Intn(256)),
|
|
uint8(rnd.Intn(256)),
|
|
255,
|
|
})
|
|
}
|
|
}
|
|
|
|
b.SetBytes(640 * 480 * 4)
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
Encode(io.Discard, rgba, nil)
|
|
}
|
|
}
|
|
|
|
func BenchmarkEncodeRealisticPaletted(b *testing.B) {
|
|
img, err := readImg("../testdata/video-001.png")
|
|
if err != nil {
|
|
b.Fatalf("readImg: %v", err)
|
|
}
|
|
bo := img.Bounds()
|
|
paletted := image.NewPaletted(bo, palette.Plan9)
|
|
draw.Draw(paletted, bo, img, bo.Min, draw.Src)
|
|
|
|
b.SetBytes(int64(bo.Dx() * bo.Dy() * 1))
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
Encode(io.Discard, paletted, nil)
|
|
}
|
|
}
|
|
|
|
func BenchmarkEncodeRealisticRGBA(b *testing.B) {
|
|
img, err := readImg("../testdata/video-001.png")
|
|
if err != nil {
|
|
b.Fatalf("readImg: %v", err)
|
|
}
|
|
bo := img.Bounds()
|
|
// Converting img to rgba is redundant for video-001.png, which is already
|
|
// in the RGBA format, but for those copy/pasting this benchmark (but
|
|
// changing the source image), the conversion ensures that we're still
|
|
// benchmarking encoding an RGBA image.
|
|
rgba := image.NewRGBA(bo)
|
|
draw.Draw(rgba, bo, img, bo.Min, draw.Src)
|
|
|
|
b.SetBytes(int64(bo.Dx() * bo.Dy() * 4))
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
Encode(io.Discard, rgba, nil)
|
|
}
|
|
}
|