ebiten/internal/atlas/image_test.go

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// Copyright 2018 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 atlas_test
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import (
"image/color"
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"runtime"
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"testing"
"github.com/hajimehoshi/ebiten/v2/internal/affine"
. "github.com/hajimehoshi/ebiten/v2/internal/atlas"
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"github.com/hajimehoshi/ebiten/v2/internal/driver"
"github.com/hajimehoshi/ebiten/v2/internal/graphics"
t "github.com/hajimehoshi/ebiten/v2/internal/testing"
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)
const (
minImageSizeForTesting = 1024
maxImageSizeForTesting = 4096
)
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func TestMain(m *testing.M) {
SetImageSizeForTesting(minImageSizeForTesting, maxImageSizeForTesting)
defer ResetImageSizeForTesting()
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t.MainWithRunLoop(m)
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}
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func quadVertices(sw, sh, x, y int, scalex float32) []float32 {
dx0 := float32(x)
dy0 := float32(y)
dx1 := float32(x) + float32(sw)*scalex
dy1 := float32(y) + float32(sh)
sx0 := float32(0)
sy0 := float32(0)
sx1 := float32(sw)
sy1 := float32(sh)
return []float32{
dx0, dy0, sx0, sy0, 1, 1, 1, 1,
dx1, dy0, sx1, sy0, 1, 1, 1, 1,
dx0, dy1, sx0, sy1, 1, 1, 1, 1,
dx1, dy1, sx1, sy1, 1, 1, 1, 1,
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}
}
const bigSize = 2049
func TestEnsureIsolated(t *testing.T) {
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// Create img1 and img2 with this size so that the next images are allocated
// with non-upper-left location.
img1 := NewImage(bigSize, 100)
defer img1.MarkDisposed()
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// Ensure img1's region is allocated.
img1.ReplacePixels(make([]byte, 4*bigSize*100))
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img2 := NewImage(100, bigSize)
defer img2.MarkDisposed()
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img2.ReplacePixels(make([]byte, 4*100*bigSize))
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const size = 32
img3 := NewImage(size/2, size/2)
defer img3.MarkDisposed()
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img3.ReplacePixels(make([]byte, (size/2)*(size/2)*4))
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img4 := NewImage(size, size)
defer img4.MarkDisposed()
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pix := make([]byte, size*size*4)
for j := 0; j < size; j++ {
for i := 0; i < size; i++ {
pix[4*(i+j*size)] = byte(i + j)
pix[4*(i+j*size)+1] = byte(i + j)
pix[4*(i+j*size)+2] = byte(i + j)
pix[4*(i+j*size)+3] = byte(i + j)
}
}
img4.ReplacePixels(pix)
const (
dx0 = size / 4
dy0 = size / 4
dx1 = size * 3 / 4
dy1 = size * 3 / 4
)
// img4.EnsureIsolated() should be called.
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vs := quadVertices(size/2, size/2, size/4, size/4, 1)
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is := graphics.QuadIndices()
dr := driver.Region{
X: 0,
Y: 0,
Width: size,
Height: size,
}
img4.DrawTriangles([graphics.ShaderImageNum]*Image{img3}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
want := false
if got := img4.IsOnAtlasForTesting(); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
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pix, err := img4.Pixels(0, 0, size, size)
if err != nil {
t.Fatal(err)
}
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for j := 0; j < size; j++ {
for i := 0; i < size; i++ {
r := pix[4*(size*j+i)]
g := pix[4*(size*j+i)+1]
b := pix[4*(size*j+i)+2]
a := pix[4*(size*j+i)+3]
got := color.RGBA{r, g, b, a}
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var want color.RGBA
if i < dx0 || dx1 <= i || j < dy0 || dy1 <= j {
c := byte(i + j)
want = color.RGBA{c, c, c, c}
}
if got != want {
t.Errorf("at(%d, %d): got: %v, want: %v", i, j, got, want)
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}
}
}
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// Check further drawing doesn't cause panic.
// This bug was fixed by 03dcd948.
img4.DrawTriangles([graphics.ShaderImageNum]*Image{img3}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
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}
func TestReputOnAtlas(t *testing.T) {
const size = 16
img0 := NewImage(size, size)
defer img0.MarkDisposed()
img0.ReplacePixels(make([]byte, 4*size*size))
img1 := NewImage(size, size)
defer img1.MarkDisposed()
img1.ReplacePixels(make([]byte, 4*size*size))
if got, want := img1.IsOnAtlasForTesting(), true; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
img2 := NewImage(size, size)
defer img2.MarkDisposed()
pix := make([]byte, 4*size*size)
for j := 0; j < size; j++ {
for i := 0; i < size; i++ {
pix[4*(i+j*size)] = byte(i + j)
pix[4*(i+j*size)+1] = byte(i + j)
pix[4*(i+j*size)+2] = byte(i + j)
pix[4*(i+j*size)+3] = byte(i + j)
}
}
img2.ReplacePixels(pix)
img3 := NewImage(size, size)
img3.SetVolatile(true)
defer img3.MarkDisposed()
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img1.ReplacePixels(make([]byte, 4*size*size))
if got, want := img3.IsOnAtlasForTesting(), false; got != want {
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t.Errorf("got: %v, want: %v", got, want)
}
// Use img1 as a render target.
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vs := quadVertices(size, size, 0, 0, 1)
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is := graphics.QuadIndices()
dr := driver.Region{
X: 0,
Y: 0,
Width: size,
Height: size,
}
img1.DrawTriangles([graphics.ShaderImageNum]*Image{img2}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := img1.IsOnAtlasForTesting(), false; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
// Use img1 as a render source.
// Use the doubled count since img1 was on a texture atlas and became an isolated image once.
// Then, img1 requires longer time to recover to be on a textur atlas again.
for i := 0; i < BaseCountToPutOnAtlas*2; i++ {
if err := PutImagesOnAtlasForTesting(); err != nil {
t.Fatal(err)
}
img0.DrawTriangles([graphics.ShaderImageNum]*Image{img1}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := img1.IsOnAtlasForTesting(), false; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
if err := PutImagesOnAtlasForTesting(); err != nil {
t.Fatal(err)
}
pix, err := img1.Pixels(0, 0, size, size)
if err != nil {
t.Fatal(err)
}
for j := 0; j < size; j++ {
for i := 0; i < size; i++ {
want := color.RGBA{byte(i + j), byte(i + j), byte(i + j), byte(i + j)}
r := pix[4*(size*j+i)]
g := pix[4*(size*j+i)+1]
b := pix[4*(size*j+i)+2]
a := pix[4*(size*j+i)+3]
got := color.RGBA{r, g, b, a}
if got != want {
t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
// img1 is on an atlas again.
img0.DrawTriangles([graphics.ShaderImageNum]*Image{img1}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := img1.IsOnAtlasForTesting(), true; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
pix, err = img1.Pixels(0, 0, size, size)
if err != nil {
t.Fatal(err)
}
for j := 0; j < size; j++ {
for i := 0; i < size; i++ {
want := color.RGBA{byte(i + j), byte(i + j), byte(i + j), byte(i + j)}
r := pix[4*(size*j+i)]
g := pix[4*(size*j+i)+1]
b := pix[4*(size*j+i)+2]
a := pix[4*(size*j+i)+3]
got := color.RGBA{r, g, b, a}
if got != want {
t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
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// Use img1 as a render target again.
img1.DrawTriangles([graphics.ShaderImageNum]*Image{img2}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := img1.IsOnAtlasForTesting(), false; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
// Use img1 as a render source, but call ReplacePixels.
// Now use 4x count as img1 became an isolated image again.
for i := 0; i < BaseCountToPutOnAtlas*4; i++ {
if err := PutImagesOnAtlasForTesting(); err != nil {
t.Fatal(err)
}
img1.ReplacePixels(make([]byte, 4*size*size))
img0.DrawTriangles([graphics.ShaderImageNum]*Image{img1}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := img1.IsOnAtlasForTesting(), false; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
if err := PutImagesOnAtlasForTesting(); err != nil {
t.Fatal(err)
}
// img1 is not on an atlas due to ReplacePixels.
img0.DrawTriangles([graphics.ShaderImageNum]*Image{img1}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := img1.IsOnAtlasForTesting(), false; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
// Use img3 as a render source. As img3 is volatile, img3 is never on an atlas.
for i := 0; i < BaseCountToPutOnAtlas*2; i++ {
if err := PutImagesOnAtlasForTesting(); err != nil {
t.Fatal(err)
}
img0.DrawTriangles([graphics.ShaderImageNum]*Image{img3}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := img3.IsOnAtlasForTesting(), false; got != want {
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t.Errorf("got: %v, want: %v", got, want)
}
}
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runtime.GC()
}
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func TestExtend(t *testing.T) {
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const w0, h0 = 100, 100
img0 := NewImage(w0, h0)
defer img0.MarkDisposed()
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p0 := make([]byte, 4*w0*h0)
for i := 0; i < w0*h0; i++ {
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p0[4*i] = byte(i)
p0[4*i+1] = byte(i)
p0[4*i+2] = byte(i)
p0[4*i+3] = byte(i)
}
img0.ReplacePixels(p0)
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const w1, h1 = minImageSizeForTesting + 1, 100
img1 := NewImage(w1, h1)
defer img1.MarkDisposed()
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p1 := make([]byte, 4*w1*h1)
for i := 0; i < w1*h1; i++ {
p1[4*i] = byte(i)
p1[4*i+1] = byte(i)
p1[4*i+2] = byte(i)
p1[4*i+3] = byte(i)
}
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// Ensure to allocate
img1.ReplacePixels(p1)
pix0, err := img0.Pixels(0, 0, w0, h0)
if err != nil {
t.Fatal(err)
}
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for j := 0; j < h0; j++ {
for i := 0; i < w0; i++ {
r := pix0[4*(w0*j+i)]
g := pix0[4*(w0*j+i)+1]
b := pix0[4*(w0*j+i)+2]
a := pix0[4*(w0*j+i)+3]
got := color.RGBA{r, g, b, a}
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c := byte(i + w0*j)
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want := color.RGBA{c, c, c, c}
if got != want {
t.Errorf("at(%d, %d): got: %v, want: %v", i, j, got, want)
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}
}
}
pix1, err := img1.Pixels(0, 0, w1, h1)
if err != nil {
t.Fatal(err)
}
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for j := 0; j < h1; j++ {
for i := 0; i < w1; i++ {
r := pix1[4*(w1*j+i)]
g := pix1[4*(w1*j+i)+1]
b := pix1[4*(w1*j+i)+2]
a := pix1[4*(w1*j+i)+3]
got := color.RGBA{r, g, b, a}
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c := byte(i + w1*j)
want := color.RGBA{c, c, c, c}
if got != want {
t.Errorf("at(%d, %d): got: %v, want: %v", i, j, got, want)
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}
}
}
}
func TestReplacePixelsAfterDrawTriangles(t *testing.T) {
const w, h = 256, 256
src := NewImage(w, h)
defer src.MarkDisposed()
dst := NewImage(w, h)
defer dst.MarkDisposed()
pix := make([]byte, 4*w*h)
for i := 0; i < w*h; i++ {
pix[4*i] = byte(i)
pix[4*i+1] = byte(i)
pix[4*i+2] = byte(i)
pix[4*i+3] = byte(i)
}
src.ReplacePixels(pix)
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vs := quadVertices(w, h, 0, 0, 1)
is := graphics.QuadIndices()
dr := driver.Region{
X: 0,
Y: 0,
Width: w,
Height: h,
}
dst.DrawTriangles([graphics.ShaderImageNum]*Image{src}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
dst.ReplacePixels(pix)
pix, err := dst.Pixels(0, 0, w, h)
if err != nil {
t.Fatal(err)
}
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
r := pix[4*(w*j+i)]
g := pix[4*(w*j+i)+1]
b := pix[4*(w*j+i)+2]
a := pix[4*(w*j+i)+3]
got := color.RGBA{r, g, b, a}
c := byte(i + w*j)
want := color.RGBA{c, c, c, c}
if got != want {
t.Errorf("at(%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
}
// Issue #887
func TestSmallImages(t *testing.T) {
const w, h = 4, 8
src := NewImage(w, h)
defer src.MarkDisposed()
dst := NewImage(w, h)
defer dst.MarkDisposed()
pix := make([]byte, 4*w*h)
for i := 0; i < w*h; i++ {
pix[4*i] = 0xff
pix[4*i+1] = 0xff
pix[4*i+2] = 0xff
pix[4*i+3] = 0xff
}
src.ReplacePixels(pix)
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vs := quadVertices(w, h, 0, 0, 1)
is := graphics.QuadIndices()
dr := driver.Region{
X: 0,
Y: 0,
Width: w,
Height: h,
}
dst.DrawTriangles([graphics.ShaderImageNum]*Image{src}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
pix, err := dst.Pixels(0, 0, w, h)
if err != nil {
t.Fatal(err)
}
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
r := pix[4*(w*j+i)]
a := pix[4*(w*j+i)+3]
if got, want := r, byte(0xff); got != want {
t.Errorf("at(%d, %d) red: got: %d, want: %d", i, j, got, want)
}
if got, want := a, byte(0xff); got != want {
t.Errorf("at(%d, %d) alpha: got: %d, want: %d", i, j, got, want)
}
}
}
}
// Issue #887
func TestLongImages(t *testing.T) {
const w, h = 1, 6
src := NewImage(w, h)
defer src.MarkDisposed()
const dstW, dstH = 256, 256
dst := NewImage(dstW, dstH)
defer dst.MarkDisposed()
pix := make([]byte, 4*w*h)
for i := 0; i < w*h; i++ {
pix[4*i] = 0xff
pix[4*i+1] = 0xff
pix[4*i+2] = 0xff
pix[4*i+3] = 0xff
}
src.ReplacePixels(pix)
const scale = 120
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vs := quadVertices(w, h, 0, 0, scale)
is := graphics.QuadIndices()
dr := driver.Region{
X: 0,
Y: 0,
Width: dstW,
Height: dstH,
}
dst.DrawTriangles([graphics.ShaderImageNum]*Image{src}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeSourceOver, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
pix, err := dst.Pixels(0, 0, dstW, dstH)
if err != nil {
t.Fatal(err)
}
for j := 0; j < h; j++ {
for i := 0; i < w*scale; i++ {
r := pix[4*(dstW*j+i)]
a := pix[4*(dstW*j+i)+3]
if got, want := r, byte(0xff); got != want {
t.Errorf("at(%d, %d) red: got: %d, want: %d", i, j, got, want)
}
if got, want := a, byte(0xff); got != want {
t.Errorf("at(%d, %d) alpha: got: %d, want: %d", i, j, got, want)
}
}
}
}
func TestDisposeImmediately(t *testing.T) {
// This tests restorable.Image.ClearPixels is called but ReplacePixels is not called.
img0 := NewImage(16, 16)
img0.EnsureIsolatedForTesting()
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defer img0.MarkDisposed()
img1 := NewImage(16, 16)
img1.EnsureIsolatedForTesting()
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defer img1.MarkDisposed()
// img0 and img1 should share the same backend in 99.9999% possibility.
}
// Issue #1028
func TestExtendWithBigImage(t *testing.T) {
img0 := NewImage(1, 1)
defer img0.MarkDisposed()
img0.ReplacePixels(make([]byte, 4*1*1))
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img1 := NewImage(minImageSizeForTesting+1, minImageSizeForTesting+1)
defer img1.MarkDisposed()
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img1.ReplacePixels(make([]byte, 4*(minImageSizeForTesting+1)*(minImageSizeForTesting+1)))
}
// Issue #1217
func TestMaxImageSize(t *testing.T) {
// This tests that a too-big image is allocated correctly.
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s := maxImageSizeForTesting - 2*PaddingSize
img := NewImage(s, s)
defer img.MarkDisposed()
img.ReplacePixels(make([]byte, 4*s*s))
}
// Issue #1217 (disabled)
func Disable_TestMinImageSize(t *testing.T) {
// The backend cannot be reset. If this is necessary, sync the state with the images (#1756).
// ResetBackendsForTesting()
// This tests that extending a backend works correctly.
// Though the image size is minimum size of the backend, extending the backend happens due to the paddings.
s := minImageSizeForTesting
img := NewImage(s, s)
defer img.MarkDisposed()
img.ReplacePixels(make([]byte, 4*s*s))
}
// Issue #1421
func TestDisposedAndReputOnAtlas(t *testing.T) {
const size = 16
src := NewImage(size, size)
defer src.MarkDisposed()
src2 := NewImage(size, size)
defer src2.MarkDisposed()
dst := NewImage(size, size)
defer dst.MarkDisposed()
// Use src as a render target so that src is not on an atlas.
vs := quadVertices(size, size, 0, 0, 1)
is := graphics.QuadIndices()
dr := driver.Region{
X: 0,
Y: 0,
Width: size,
Height: size,
}
src.DrawTriangles([graphics.ShaderImageNum]*Image{src2}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := src.IsOnAtlasForTesting(), false; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
// Use src as a render source.
for i := 0; i < BaseCountToPutOnAtlas/2; i++ {
if err := PutImagesOnAtlasForTesting(); err != nil {
t.Fatal(err)
}
dst.DrawTriangles([graphics.ShaderImageNum]*Image{src}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := src.IsOnAtlasForTesting(), false; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
// Before PutImaegsOnAtlasForTesting, dispose the image.
src.MarkDisposed()
// Force to dispose the image.
ResolveDeferredForTesting()
// Confirm that PutImagesOnAtlasForTesting doesn't panic.
if err := PutImagesOnAtlasForTesting(); err != nil {
t.Fatal(err)
}
}
// Issue #1456
func TestImageIsNotReputOnAtlasWithoutUsingAsSource(t *testing.T) {
const size = 16
src := NewImage(size, size)
defer src.MarkDisposed()
src2 := NewImage(size, size)
defer src2.MarkDisposed()
dst := NewImage(size, size)
defer dst.MarkDisposed()
// Use src as a render target so that src is not on an atlas.
vs := quadVertices(size, size, 0, 0, 1)
is := graphics.QuadIndices()
dr := driver.Region{
X: 0,
Y: 0,
Width: size,
Height: size,
}
// Use src2 as a rendering target, and make src2 an independent image.
src2.DrawTriangles([graphics.ShaderImageNum]*Image{src}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := src2.IsOnAtlasForTesting(), false; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
// Update the count without using src2 as a rendering source.
// This should not affect whether src2 is on an atlas or not.
for i := 0; i < BaseCountToPutOnAtlas; i++ {
if err := PutImagesOnAtlasForTesting(); err != nil {
t.Fatal(err)
}
if got, want := src2.IsOnAtlasForTesting(), false; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
// Update the count with using src2 as a rendering source.
for i := 0; i < BaseCountToPutOnAtlas; i++ {
if err := PutImagesOnAtlasForTesting(); err != nil {
t.Fatal(err)
}
dst.DrawTriangles([graphics.ShaderImageNum]*Image{src2}, vs, is, affine.ColorMIdentity{}, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, [graphics.ShaderImageNum - 1][2]float32{}, nil, nil, false)
if got, want := src2.IsOnAtlasForTesting(), false; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
if err := PutImagesOnAtlasForTesting(); err != nil {
t.Fatal(err)
}
if got, want := src2.IsOnAtlasForTesting(), true; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
// TODO: Add tests to extend image on an atlas out of the main loop