ebiten/internal/restorable/images_test.go

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// Copyright 2017 The Ebiten Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package restorable_test
import (
"errors"
"image"
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"image/color"
"os"
"testing"
"github.com/hajimehoshi/ebiten"
"github.com/hajimehoshi/ebiten/internal/driver"
"github.com/hajimehoshi/ebiten/internal/graphics"
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. "github.com/hajimehoshi/ebiten/internal/restorable"
"github.com/hajimehoshi/ebiten/internal/testflock"
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)
func TestMain(m *testing.M) {
testflock.Lock()
defer testflock.Unlock()
EnableRestoringForTesting()
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code := 0
regularTermination := errors.New("regular termination")
f := func(screen *ebiten.Image) error {
code = m.Run()
return regularTermination
}
if err := ebiten.Run(f, 320, 240, 1, "Test"); err != nil && err != regularTermination {
panic(err)
}
os.Exit(code)
}
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func pixelsToColor(p *Pixels, index int) color.RGBA {
i := index * 4
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return color.RGBA{p.At(i), p.At(i + 1), p.At(i + 2), p.At(i + 3)}
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}
func abs(x int) int {
if x < 0 {
return -x
}
return x
}
// sameColors compares c1 and c2 and returns a boolean value indicating
// if the two colors are (almost) same.
//
// Pixels read from GPU might include errors (#492), and
// sameColors considers such errors as delta.
func sameColors(c1, c2 color.RGBA, delta int) bool {
return abs(int(c1.R)-int(c2.R)) <= delta &&
abs(int(c1.G)-int(c2.G)) <= delta &&
abs(int(c1.B)-int(c2.B)) <= delta &&
abs(int(c1.A)-int(c2.A)) <= delta
}
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func TestRestore(t *testing.T) {
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img0 := NewImage(1, 1)
defer img0.Dispose()
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clr0 := color.RGBA{0x00, 0x00, 0x00, 0xff}
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img0.Fill(clr0.R, clr0.G, clr0.B, clr0.A)
ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
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t.Fatal(err)
}
want := clr0
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got := pixelsToColor(img0.BasePixelsForTesting(), 0)
if !sameColors(got, want, 1) {
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t.Errorf("got %v, want %v", got, want)
}
}
func TestRestoreWithoutDraw(t *testing.T) {
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img0 := NewImage(1024, 1024)
defer img0.Dispose()
// If there is no drawing command on img0, img0 is cleared when restored.
ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
for i := 0; i < 1024*1024; i++ {
want := color.RGBA{0x00, 0x00, 0x00, 0x00}
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got := pixelsToColor(img0.BasePixelsForTesting(), i)
if !sameColors(got, want, 0) {
t.Errorf("got %v, want %v", got, want)
}
}
}
func quadVertices(src *Image, sw, sh, x, y int) []float32 {
vs := make([]float32, 4*graphics.VertexFloatNum)
graphics.PutQuadVertices(vs, src, 0, 0, sw, sh,
1, 0, 0, 1, float32(x), float32(y),
1, 1, 1, 1)
return vs
}
func TestRestoreChain(t *testing.T) {
const num = 10
imgs := []*Image{}
for i := 0; i < num; i++ {
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img := NewImage(1, 1)
imgs = append(imgs, img)
}
defer func() {
for _, img := range imgs {
img.Dispose()
}
}()
clr := color.RGBA{0x00, 0x00, 0x00, 0xff}
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imgs[0].Fill(clr.R, clr.G, clr.B, clr.A)
for i := 0; i < num-1; i++ {
vs := quadVertices(imgs[i], 1, 1, 0, 0)
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is := graphics.QuadIndices()
imgs[i+1].DrawTriangles(imgs[i], vs, is, nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressClampToZero)
}
ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
want := clr
for i, img := range imgs {
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got := pixelsToColor(img.BasePixelsForTesting(), 0)
if !sameColors(got, want, 1) {
t.Errorf("%d: got %v, want %v", i, got, want)
}
}
}
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func TestRestoreChain2(t *testing.T) {
const (
num = 10
w = 1
h = 1
)
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imgs := []*Image{}
for i := 0; i < num; i++ {
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img := NewImage(w, h)
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imgs = append(imgs, img)
}
defer func() {
for _, img := range imgs {
img.Dispose()
}
}()
clr0 := color.RGBA{0xff, 0x00, 0x00, 0xff}
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imgs[0].Fill(clr0.R, clr0.G, clr0.B, clr0.A)
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clr7 := color.RGBA{0x00, 0xff, 0x00, 0xff}
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imgs[7].Fill(clr7.R, clr7.G, clr7.B, clr7.A)
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clr8 := color.RGBA{0x00, 0x00, 0xff, 0xff}
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imgs[8].Fill(clr8.R, clr8.G, clr8.B, clr8.A)
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is := graphics.QuadIndices()
imgs[8].DrawTriangles(imgs[7], quadVertices(imgs[7], w, h, 0, 0), is, nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressClampToZero)
imgs[9].DrawTriangles(imgs[8], quadVertices(imgs[8], w, h, 0, 0), is, nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressClampToZero)
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for i := 0; i < 7; i++ {
imgs[i+1].DrawTriangles(imgs[i], quadVertices(imgs[i], w, h, 0, 0), is, nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressClampToZero)
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}
ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
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t.Fatal(err)
}
for i, img := range imgs {
want := clr0
if i == 8 || i == 9 {
want = clr7
}
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got := pixelsToColor(img.BasePixelsForTesting(), 0)
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if !sameColors(got, want, 1) {
t.Errorf("%d: got %v, want %v", i, got, want)
}
}
}
func TestRestoreOverrideSource(t *testing.T) {
const (
w = 1
h = 1
)
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img0 := NewImage(w, h)
img1 := NewImage(w, h)
img2 := NewImage(w, h)
img3 := NewImage(w, h)
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defer func() {
img3.Dispose()
img2.Dispose()
img1.Dispose()
img0.Dispose()
}()
clr0 := color.RGBA{0x00, 0x00, 0x00, 0xff}
clr1 := color.RGBA{0x00, 0x00, 0x01, 0xff}
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img1.Fill(clr0.R, clr0.G, clr0.B, clr0.A)
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is := graphics.QuadIndices()
img2.DrawTriangles(img1, quadVertices(img1, w, h, 0, 0), is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
img3.DrawTriangles(img2, quadVertices(img2, w, h, 0, 0), is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
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img0.Fill(clr1.R, clr1.G, clr1.B, clr1.A)
img1.DrawTriangles(img0, quadVertices(img0, w, h, 0, 0), is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
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t.Fatal(err)
}
testCases := []struct {
name string
want color.RGBA
got color.RGBA
}{
{
"0",
clr1,
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pixelsToColor(img0.BasePixelsForTesting(), 0),
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},
{
"1",
clr1,
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pixelsToColor(img1.BasePixelsForTesting(), 0),
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},
{
"2",
clr0,
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pixelsToColor(img2.BasePixelsForTesting(), 0),
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},
{
"3",
clr0,
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pixelsToColor(img3.BasePixelsForTesting(), 0),
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},
}
for _, c := range testCases {
if !sameColors(c.got, c.want, 1) {
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t.Errorf("%s: got %v, want %v", c.name, c.got, c.want)
}
}
}
func TestRestoreComplexGraph(t *testing.T) {
const (
w = 4
h = 1
)
// 0 -> 3
// 1 -> 3
// 1 -> 4
// 2 -> 4
// 2 -> 7
// 3 -> 5
// 3 -> 6
// 3 -> 7
// 4 -> 6
base := image.NewRGBA(image.Rect(0, 0, w, h))
base.Pix[0] = 0xff
base.Pix[1] = 0xff
base.Pix[2] = 0xff
base.Pix[3] = 0xff
img0 := newImageFromImage(base)
img1 := newImageFromImage(base)
img2 := newImageFromImage(base)
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img3 := NewImage(w, h)
img4 := NewImage(w, h)
img5 := NewImage(w, h)
img6 := NewImage(w, h)
img7 := NewImage(w, h)
defer func() {
img7.Dispose()
img6.Dispose()
img5.Dispose()
img4.Dispose()
img3.Dispose()
img2.Dispose()
img1.Dispose()
img0.Dispose()
}()
vs := quadVertices(img0, w, h, 0, 0)
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is := graphics.QuadIndices()
img3.DrawTriangles(img0, vs, is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
vs = quadVertices(img1, w, h, 1, 0)
img3.DrawTriangles(img1, vs, is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
vs = quadVertices(img1, w, h, 1, 0)
img4.DrawTriangles(img1, vs, is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
vs = quadVertices(img2, w, h, 2, 0)
img4.DrawTriangles(img2, vs, is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
vs = quadVertices(img3, w, h, 0, 0)
img5.DrawTriangles(img3, vs, is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
vs = quadVertices(img3, w, h, 0, 0)
img6.DrawTriangles(img3, vs, is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
vs = quadVertices(img4, w, h, 1, 0)
img6.DrawTriangles(img4, vs, is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
vs = quadVertices(img2, w, h, 0, 0)
img7.DrawTriangles(img2, vs, is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
vs = quadVertices(img3, w, h, 2, 0)
img7.DrawTriangles(img3, vs, is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
testCases := []struct {
name string
out string
image *Image
}{
{
"0",
"*---",
img0,
},
{
"1",
"*---",
img1,
},
{
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"2",
"*---",
img2,
},
{
"3",
"**--",
img3,
},
{
"4",
"-**-",
img4,
},
{
"5",
"**--",
img5,
},
{
"6",
"****",
img6,
},
{
"7",
"*-**",
img7,
},
}
for _, c := range testCases {
for i := 0; i < 4; i++ {
want := color.RGBA{}
if c.out[i] == '*' {
want = color.RGBA{0xff, 0xff, 0xff, 0xff}
}
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got := pixelsToColor(c.image.BasePixelsForTesting(), i)
if !sameColors(got, want, 1) {
t.Errorf("%s[%d]: got %v, want %v", c.name, i, got, want)
}
}
}
}
func newImageFromImage(rgba *image.RGBA) *Image {
s := rgba.Bounds().Size()
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img := NewImage(s.X, s.Y)
img.ReplacePixels(rgba.Pix, 0, 0, s.X, s.Y)
return img
}
func TestRestoreRecursive(t *testing.T) {
const (
w = 4
h = 1
)
base := image.NewRGBA(image.Rect(0, 0, w, h))
base.Pix[0] = 0xff
base.Pix[1] = 0xff
base.Pix[2] = 0xff
base.Pix[3] = 0xff
img0 := newImageFromImage(base)
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img1 := NewImage(w, h)
defer func() {
img1.Dispose()
img0.Dispose()
}()
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is := graphics.QuadIndices()
img1.DrawTriangles(img0, quadVertices(img0, w, h, 1, 0), is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
img0.DrawTriangles(img1, quadVertices(img1, w, h, 1, 0), is, nil, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressClampToZero)
ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
testCases := []struct {
name string
out string
image *Image
}{
{
"0",
"*-*-",
img0,
},
{
"1",
"-*--",
img1,
},
}
for _, c := range testCases {
for i := 0; i < 4; i++ {
want := color.RGBA{}
if c.out[i] == '*' {
want = color.RGBA{0xff, 0xff, 0xff, 0xff}
}
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got := pixelsToColor(c.image.BasePixelsForTesting(), i)
if !sameColors(got, want, 1) {
t.Errorf("%s[%d]: got %v, want %v", c.name, i, got, want)
}
}
}
}
func TestReplacePixels(t *testing.T) {
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img := NewImage(17, 31)
defer img.Dispose()
pix := make([]byte, 4*4*4)
for i := range pix {
pix[i] = 0xff
}
img.ReplacePixels(pix, 5, 7, 4, 4)
// Check the region (5, 7)-(9, 11). Outside state is indeterministic.
for j := 7; j < 11; j++ {
for i := 5; i < 9; i++ {
r, g, b, a := img.At(i, j)
got := color.RGBA{r, g, b, a}
want := color.RGBA{0xff, 0xff, 0xff, 0xff}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
for j := 7; j < 11; j++ {
for i := 5; i < 9; i++ {
r, g, b, a := img.At(i, j)
got := color.RGBA{r, g, b, a}
want := color.RGBA{0xff, 0xff, 0xff, 0xff}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestDrawTrianglesAndReplacePixels(t *testing.T) {
base := image.NewRGBA(image.Rect(0, 0, 1, 1))
base.Pix[0] = 0xff
base.Pix[1] = 0
base.Pix[2] = 0
base.Pix[3] = 0xff
img0 := newImageFromImage(base)
defer img0.Dispose()
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img1 := NewImage(2, 1)
defer img1.Dispose()
vs := quadVertices(img0, 1, 1, 0, 0)
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is := graphics.QuadIndices()
img1.DrawTriangles(img0, vs, is, nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressClampToZero)
img1.ReplacePixels([]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, 0, 0, 2, 1)
ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
r, g, b, a := img1.At(0, 0)
got := color.RGBA{r, g, b, a}
want := color.RGBA{0xff, 0xff, 0xff, 0xff}
if !sameColors(got, want, 1) {
t.Errorf("got: %v, want: %v", got, want)
}
}
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func TestDispose(t *testing.T) {
base0 := image.NewRGBA(image.Rect(0, 0, 1, 1))
img0 := newImageFromImage(base0)
defer img0.Dispose()
base1 := image.NewRGBA(image.Rect(0, 0, 1, 1))
img1 := newImageFromImage(base1)
base2 := image.NewRGBA(image.Rect(0, 0, 1, 1))
base2.Pix[0] = 0xff
base2.Pix[1] = 0xff
base2.Pix[2] = 0xff
base2.Pix[3] = 0xff
img2 := newImageFromImage(base2)
defer img2.Dispose()
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is := graphics.QuadIndices()
img1.DrawTriangles(img2, quadVertices(img2, 1, 1, 0, 0), is, nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressClampToZero)
img0.DrawTriangles(img1, quadVertices(img1, 1, 1, 0, 0), is, nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressClampToZero)
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img1.Dispose()
ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
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t.Fatal(err)
}
r, g, b, a := img0.At(0, 0)
got := color.RGBA{r, g, b, a}
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want := color.RGBA{0xff, 0xff, 0xff, 0xff}
if !sameColors(got, want, 1) {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestClear(t *testing.T) {
pix := make([]uint8, 4*4*4)
for i := range pix {
pix[i] = 0xff
}
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img := NewImage(4, 4)
img.ReplacePixels(pix, 0, 0, 4, 4)
// This doesn't make the image stale. Its base pixels are available.
img.ReplacePixels(nil, 1, 1, 2, 2)
cases := []struct {
Index int
Want color.RGBA
}{
{
Index: 0,
Want: color.RGBA{0xff, 0xff, 0xff, 0xff},
},
{
Index: 3,
Want: color.RGBA{0xff, 0xff, 0xff, 0xff},
},
{
Index: 4,
Want: color.RGBA{0xff, 0xff, 0xff, 0xff},
},
{
Index: 5,
Want: color.RGBA{0, 0, 0, 0},
},
{
Index: 7,
Want: color.RGBA{0xff, 0xff, 0xff, 0xff},
},
{
Index: 8,
Want: color.RGBA{0xff, 0xff, 0xff, 0xff},
},
{
Index: 10,
Want: color.RGBA{0, 0, 0, 0},
},
{
Index: 11,
Want: color.RGBA{0xff, 0xff, 0xff, 0xff},
},
{
Index: 12,
Want: color.RGBA{0xff, 0xff, 0xff, 0xff},
},
{
Index: 15,
Want: color.RGBA{0xff, 0xff, 0xff, 0xff},
},
}
for _, c := range cases {
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got := pixelsToColor(img.BasePixelsForTesting(), c.Index)
want := c.Want
if got != want {
t.Errorf("base pixel [%d]: got %v, want %v", c.Index, got, want)
}
}
}
func TestReplacePixelsOnly(t *testing.T) {
const w, h = 128, 128
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img0 := NewImage(w, h)
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defer img0.Dispose()
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img1 := NewImage(1, 1)
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defer img1.Dispose()
for i := 0; i < w*h; i += 5 {
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img0.ReplacePixels([]byte{1, 2, 3, 4}, i%w, i/w, 1, 1)
}
vs := quadVertices(img0, 1, 1, 0, 0)
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is := graphics.QuadIndices()
img1.DrawTriangles(img0, vs, is, nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressClampToZero)
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img0.ReplacePixels([]byte{5, 6, 7, 8}, 0, 0, 1, 1)
// BasePixelsForTesting is available without GPU accessing.
for i := 0; i < w*h; i++ {
var want color.RGBA
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switch {
case i == 0:
want = color.RGBA{5, 6, 7, 8}
case i%5 == 0:
want = color.RGBA{1, 2, 3, 4}
}
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got := pixelsToColor(img0.BasePixelsForTesting(), i)
if !sameColors(got, want, 0) {
t.Errorf("got %v, want %v", got, want)
}
}
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ResolveStaleImages()
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if err := RestoreIfNeeded(); err != nil {
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t.Fatal(err)
}
want := color.RGBA{1, 2, 3, 4}
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got := pixelsToColor(img1.BasePixelsForTesting(), 0)
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if !sameColors(got, want, 0) {
t.Errorf("got %v, want %v", got, want)
}
}
// TODO: How about volatile/screen images?
// Issue #793
func TestReadPixelsFromVolatileImage(t *testing.T) {
const w, h = 16, 16
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dst := NewImage(w, h)
dst.MakeVolatile()
src := NewImage(w, h)
// First, make sure that dst has pixels
dst.ReplacePixels(make([]byte, 4*w*h), 0, 0, w, h)
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// Second, draw src to dst. If the implementation is correct, dst becomes stale.
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src.Fill(0xff, 0xff, 0xff, 0xff)
vs := quadVertices(src, 1, 1, 0, 0)
is := graphics.QuadIndices()
dst.DrawTriangles(src, vs, is, nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressClampToZero)
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// Read the pixels. If the implementation is correct, dst tries to read its pixels from GPU due to being
// stale.
want := byte(0xff)
got, _, _, _ := dst.At(0, 0)
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}