ebiten/internal/shareable/shareable_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 shareable_test
import (
"errors"
"image/color"
"os"
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"runtime"
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"testing"
"github.com/hajimehoshi/ebiten"
"github.com/hajimehoshi/ebiten/internal/graphics"
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. "github.com/hajimehoshi/ebiten/internal/shareable"
"github.com/hajimehoshi/ebiten/internal/testflock"
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)
func TestMain(m *testing.M) {
testflock.Lock()
defer testflock.Unlock()
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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)
}
const bigSize = 2049
func TestEnsureNotShared(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)
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defer img1.Dispose()
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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)
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defer img2.Dispose()
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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.Dispose()
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img3.ReplacePixels(make([]byte, (size/2)*(size/2)*4))
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img4 := NewImage(size, size)
defer img4.Dispose()
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.ensureNotShared() should be called.
vs := img3.QuadVertices(0, 0, size/2, size/2, 1, 0, 0, 1, size/4, size/4, 1, 1, 1, 1)
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is := graphics.QuadIndices()
img4.DrawImage(img3, vs, is, nil, graphics.CompositeModeCopy, graphics.FilterNearest, graphics.AddressClampToZero)
want := false
if got := img4.IsSharedForTesting(); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
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for j := 0; j < size; j++ {
for i := 0; i < size; i++ {
got := img4.At(i, j)
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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("img4.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
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// Check further drawing doesn't cause panic.
// This bug was fixed by 03dcd948.
img4.DrawImage(img3, vs, is, nil, graphics.CompositeModeCopy, graphics.FilterNearest, graphics.AddressClampToZero)
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}
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func Disabled_TestReshared(t *testing.T) {
const size = 16
img0 := NewImage(size, size)
defer img0.Dispose()
img0.ReplacePixels(make([]byte, 4*size*size))
img1 := NewImage(size, size)
defer img1.Dispose()
img1.ReplacePixels(make([]byte, 4*size*size))
want := true
if got := img1.IsSharedForTesting(); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
img2 := NewImage(size, size)
defer img2.Dispose()
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)
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img3 := NewVolatileImage(size, size)
defer img3.Dispose()
img1.ReplacePixels(make([]byte, 4*size*size))
want = false
if got := img3.IsSharedForTesting(); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
// Use img1 as a render target.
vs := img2.QuadVertices(0, 0, size, size, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1)
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is := graphics.QuadIndices()
img1.DrawImage(img2, vs, is, nil, graphics.CompositeModeCopy, graphics.FilterNearest, graphics.AddressClampToZero)
want = false
if got := img1.IsSharedForTesting(); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
// Use img1 as a render source.
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for i := 0; i < MaxCountForShare-1; i++ {
img0.DrawImage(img1, vs, is, nil, graphics.CompositeModeCopy, graphics.FilterNearest, graphics.AddressClampToZero)
want := false
if got := img1.IsSharedForTesting(); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
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)}
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got := img1.At(i, j)
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
}
img0.DrawImage(img1, vs, is, nil, graphics.CompositeModeCopy, graphics.FilterNearest, graphics.AddressClampToZero)
want = true
if got := img1.IsSharedForTesting(); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
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)}
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got := img1.At(i, j)
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
}
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// Use img3 as a render source. img3 never uses a shared texture.
for i := 0; i < MaxCountForShare*2; i++ {
img0.DrawImage(img3, vs, is, nil, graphics.CompositeModeCopy, graphics.FilterNearest, graphics.AddressClampToZero)
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want := false
if got := img3.IsSharedForTesting(); got != want {
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.Dispose()
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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 = 1025, 100
img1 := NewImage(w1, h1)
defer img1.Dispose()
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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)
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for j := 0; j < h0; j++ {
for i := 0; i < w0; i++ {
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got := img0.At(i, j)
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c := byte(i + w0*j)
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want := color.RGBA{c, c, c, c}
if got != want {
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t.Errorf("img0.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
for j := 0; j < h1; j++ {
for i := 0; i < w1; i++ {
got := img1.At(i, j)
c := byte(i + w1*j)
want := color.RGBA{c, c, c, c}
if got != want {
t.Errorf("img1.At(%d, %d): got: %v, want: %v", i, j, got, want)
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}
}
}
img0.Dispose()
img1.Dispose()
}
func TestReplacePixelsAfterDrawImage(t *testing.T) {
const w, h = 256, 256
src := NewImage(w, h)
defer src.Dispose()
dst := NewImage(w, h)
defer dst.Dispose()
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)
vs := src.QuadVertices(0, 0, w, h, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1)
is := graphics.QuadIndices()
dst.DrawImage(src, vs, is, nil, graphics.CompositeModeCopy, graphics.FilterNearest, graphics.AddressClampToZero)
dst.ReplacePixels(pix)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j)
c := byte(i + w*j)
want := color.RGBA{c, c, c, c}
if got != want {
t.Errorf("dst.At(%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
}