mirror of https://github.com/golang/go.git
372 lines
8.5 KiB
Go
372 lines
8.5 KiB
Go
// Copyright 2011 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 image
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import (
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"image/color"
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"testing"
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)
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type image interface {
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Image
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Opaque() bool
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Set(int, int, color.Color)
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SubImage(Rectangle) Image
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}
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func cmp(cm color.Model, c0, c1 color.Color) bool {
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r0, g0, b0, a0 := cm.Convert(c0).RGBA()
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r1, g1, b1, a1 := cm.Convert(c1).RGBA()
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return r0 == r1 && g0 == g1 && b0 == b1 && a0 == a1
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}
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var testImages = []struct {
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name string
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image func() image
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}{
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{"rgba", func() image { return NewRGBA(Rect(0, 0, 10, 10)) }},
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{"rgba64", func() image { return NewRGBA64(Rect(0, 0, 10, 10)) }},
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{"nrgba", func() image { return NewNRGBA(Rect(0, 0, 10, 10)) }},
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{"nrgba64", func() image { return NewNRGBA64(Rect(0, 0, 10, 10)) }},
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{"alpha", func() image { return NewAlpha(Rect(0, 0, 10, 10)) }},
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{"alpha16", func() image { return NewAlpha16(Rect(0, 0, 10, 10)) }},
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{"gray", func() image { return NewGray(Rect(0, 0, 10, 10)) }},
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{"gray16", func() image { return NewGray16(Rect(0, 0, 10, 10)) }},
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{"paletted", func() image {
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return NewPaletted(Rect(0, 0, 10, 10), color.Palette{
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Transparent,
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Opaque,
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})
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}},
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}
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func TestImage(t *testing.T) {
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for _, tc := range testImages {
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m := tc.image()
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if !Rect(0, 0, 10, 10).Eq(m.Bounds()) {
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t.Errorf("%T: want bounds %v, got %v", m, Rect(0, 0, 10, 10), m.Bounds())
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continue
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}
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if !cmp(m.ColorModel(), Transparent, m.At(6, 3)) {
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t.Errorf("%T: at (6, 3), want a zero color, got %v", m, m.At(6, 3))
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continue
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}
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m.Set(6, 3, Opaque)
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if !cmp(m.ColorModel(), Opaque, m.At(6, 3)) {
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t.Errorf("%T: at (6, 3), want a non-zero color, got %v", m, m.At(6, 3))
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continue
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}
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if !m.SubImage(Rect(6, 3, 7, 4)).(image).Opaque() {
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t.Errorf("%T: at (6, 3) was not opaque", m)
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continue
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}
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m = m.SubImage(Rect(3, 2, 9, 8)).(image)
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if !Rect(3, 2, 9, 8).Eq(m.Bounds()) {
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t.Errorf("%T: sub-image want bounds %v, got %v", m, Rect(3, 2, 9, 8), m.Bounds())
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continue
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}
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if !cmp(m.ColorModel(), Opaque, m.At(6, 3)) {
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t.Errorf("%T: sub-image at (6, 3), want a non-zero color, got %v", m, m.At(6, 3))
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continue
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}
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if !cmp(m.ColorModel(), Transparent, m.At(3, 3)) {
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t.Errorf("%T: sub-image at (3, 3), want a zero color, got %v", m, m.At(3, 3))
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continue
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}
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m.Set(3, 3, Opaque)
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if !cmp(m.ColorModel(), Opaque, m.At(3, 3)) {
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t.Errorf("%T: sub-image at (3, 3), want a non-zero color, got %v", m, m.At(3, 3))
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continue
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}
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// Test that taking an empty sub-image starting at a corner does not panic.
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m.SubImage(Rect(0, 0, 0, 0))
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m.SubImage(Rect(10, 0, 10, 0))
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m.SubImage(Rect(0, 10, 0, 10))
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m.SubImage(Rect(10, 10, 10, 10))
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}
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}
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func TestNewXxxBadRectangle(t *testing.T) {
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// call calls f(r) and reports whether it ran without panicking.
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call := func(f func(Rectangle), r Rectangle) (ok bool) {
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defer func() {
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if recover() != nil {
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ok = false
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}
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}()
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f(r)
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return true
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}
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testCases := []struct {
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name string
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f func(Rectangle)
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}{
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{"RGBA", func(r Rectangle) { NewRGBA(r) }},
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{"RGBA64", func(r Rectangle) { NewRGBA64(r) }},
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{"NRGBA", func(r Rectangle) { NewNRGBA(r) }},
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{"NRGBA64", func(r Rectangle) { NewNRGBA64(r) }},
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{"Alpha", func(r Rectangle) { NewAlpha(r) }},
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{"Alpha16", func(r Rectangle) { NewAlpha16(r) }},
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{"Gray", func(r Rectangle) { NewGray(r) }},
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{"Gray16", func(r Rectangle) { NewGray16(r) }},
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{"CMYK", func(r Rectangle) { NewCMYK(r) }},
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{"Paletted", func(r Rectangle) { NewPaletted(r, color.Palette{color.Black, color.White}) }},
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{"YCbCr", func(r Rectangle) { NewYCbCr(r, YCbCrSubsampleRatio422) }},
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{"NYCbCrA", func(r Rectangle) { NewNYCbCrA(r, YCbCrSubsampleRatio444) }},
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}
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for _, tc := range testCases {
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// Calling NewXxx(r) should fail (panic, since NewXxx doesn't return an
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// error) unless r's width and height are both non-negative.
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for _, negDx := range []bool{false, true} {
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for _, negDy := range []bool{false, true} {
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r := Rectangle{
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Min: Point{15, 28},
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Max: Point{16, 29},
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}
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if negDx {
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r.Max.X = 14
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}
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if negDy {
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r.Max.Y = 27
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}
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got := call(tc.f, r)
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want := !negDx && !negDy
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if got != want {
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t.Errorf("New%s: negDx=%t, negDy=%t: got %t, want %t",
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tc.name, negDx, negDy, got, want)
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}
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}
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}
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// Passing a Rectangle whose width and height is MaxInt should also fail
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// (panic), due to overflow.
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{
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zeroAsUint := uint(0)
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maxUint := zeroAsUint - 1
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maxInt := int(maxUint / 2)
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got := call(tc.f, Rectangle{
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Min: Point{0, 0},
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Max: Point{maxInt, maxInt},
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})
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if got {
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t.Errorf("New%s: overflow: got ok, want !ok", tc.name)
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}
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}
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}
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}
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func Test16BitsPerColorChannel(t *testing.T) {
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testColorModel := []color.Model{
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color.RGBA64Model,
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color.NRGBA64Model,
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color.Alpha16Model,
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color.Gray16Model,
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}
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for _, cm := range testColorModel {
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c := cm.Convert(color.RGBA64{0x1234, 0x1234, 0x1234, 0x1234}) // Premultiplied alpha.
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r, _, _, _ := c.RGBA()
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if r != 0x1234 {
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t.Errorf("%T: want red value 0x%04x got 0x%04x", c, 0x1234, r)
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continue
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}
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}
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testImage := []image{
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NewRGBA64(Rect(0, 0, 10, 10)),
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NewNRGBA64(Rect(0, 0, 10, 10)),
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NewAlpha16(Rect(0, 0, 10, 10)),
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NewGray16(Rect(0, 0, 10, 10)),
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}
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for _, m := range testImage {
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m.Set(1, 2, color.NRGBA64{0xffff, 0xffff, 0xffff, 0x1357}) // Non-premultiplied alpha.
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r, _, _, _ := m.At(1, 2).RGBA()
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if r != 0x1357 {
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t.Errorf("%T: want red value 0x%04x got 0x%04x", m, 0x1357, r)
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continue
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}
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}
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}
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func BenchmarkAt(b *testing.B) {
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for _, tc := range testImages {
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b.Run(tc.name, func(b *testing.B) {
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m := tc.image()
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.At(4, 5)
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}
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})
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}
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}
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func BenchmarkSet(b *testing.B) {
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c := color.Gray{0xff}
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for _, tc := range testImages {
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b.Run(tc.name, func(b *testing.B) {
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m := tc.image()
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.Set(4, 5, c)
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}
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})
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}
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}
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func BenchmarkRGBAAt(b *testing.B) {
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m := NewRGBA(Rect(0, 0, 10, 10))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.RGBAAt(4, 5)
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}
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}
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func BenchmarkRGBASetRGBA(b *testing.B) {
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m := NewRGBA(Rect(0, 0, 10, 10))
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c := color.RGBA{0xff, 0xff, 0xff, 0x13}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.SetRGBA(4, 5, c)
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}
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}
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func BenchmarkRGBA64At(b *testing.B) {
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m := NewRGBA64(Rect(0, 0, 10, 10))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.RGBA64At(4, 5)
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}
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}
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func BenchmarkRGBA64SetRGBA64(b *testing.B) {
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m := NewRGBA64(Rect(0, 0, 10, 10))
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c := color.RGBA64{0xffff, 0xffff, 0xffff, 0x1357}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.SetRGBA64(4, 5, c)
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}
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}
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func BenchmarkNRGBAAt(b *testing.B) {
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m := NewNRGBA(Rect(0, 0, 10, 10))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.NRGBAAt(4, 5)
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}
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}
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func BenchmarkNRGBASetNRGBA(b *testing.B) {
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m := NewNRGBA(Rect(0, 0, 10, 10))
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c := color.NRGBA{0xff, 0xff, 0xff, 0x13}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.SetNRGBA(4, 5, c)
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}
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}
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func BenchmarkNRGBA64At(b *testing.B) {
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m := NewNRGBA64(Rect(0, 0, 10, 10))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.NRGBA64At(4, 5)
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}
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}
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func BenchmarkNRGBA64SetNRGBA64(b *testing.B) {
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m := NewNRGBA64(Rect(0, 0, 10, 10))
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c := color.NRGBA64{0xffff, 0xffff, 0xffff, 0x1357}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.SetNRGBA64(4, 5, c)
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}
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}
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func BenchmarkAlphaAt(b *testing.B) {
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m := NewAlpha(Rect(0, 0, 10, 10))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.AlphaAt(4, 5)
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}
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}
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func BenchmarkAlphaSetAlpha(b *testing.B) {
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m := NewAlpha(Rect(0, 0, 10, 10))
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c := color.Alpha{0x13}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.SetAlpha(4, 5, c)
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}
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}
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func BenchmarkAlpha16At(b *testing.B) {
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m := NewAlpha16(Rect(0, 0, 10, 10))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.Alpha16At(4, 5)
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}
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}
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func BenchmarkAlphaSetAlpha16(b *testing.B) {
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m := NewAlpha16(Rect(0, 0, 10, 10))
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c := color.Alpha16{0x13}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.SetAlpha16(4, 5, c)
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}
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}
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func BenchmarkGrayAt(b *testing.B) {
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m := NewGray(Rect(0, 0, 10, 10))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.GrayAt(4, 5)
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}
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}
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func BenchmarkGraySetGray(b *testing.B) {
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m := NewGray(Rect(0, 0, 10, 10))
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c := color.Gray{0x13}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.SetGray(4, 5, c)
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}
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}
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func BenchmarkGray16At(b *testing.B) {
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m := NewGray16(Rect(0, 0, 10, 10))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.Gray16At(4, 5)
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}
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}
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func BenchmarkGraySetGray16(b *testing.B) {
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m := NewGray16(Rect(0, 0, 10, 10))
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c := color.Gray16{0x13}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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m.SetGray16(4, 5, c)
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}
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}
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