ebiten/internal/buffered/image_test.go

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// Copyright 2019 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 buffered_test
import (
"errors"
"image/color"
"os"
"testing"
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"github.com/hajimehoshi/ebiten/v2"
)
var mainCh = make(chan func())
func runOnMainThread(f func()) {
ch := make(chan struct{})
mainCh <- func() {
f()
close(ch)
}
<-ch
}
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var regularTermination = errors.New("regular termination")
type game struct {
m *testing.M
endCh chan struct{}
code int
}
func (g *game) Update() error {
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select {
case f := <-mainCh:
f()
case <-g.endCh:
return regularTermination
}
return nil
}
func (*game) Draw(*ebiten.Image) {
}
func (*game) Layout(int, int) (int, int) {
return 320, 240
}
func TestMain(m *testing.M) {
codeCh := make(chan int)
endCh := make(chan struct{})
go func() {
code := m.Run()
close(endCh)
codeCh <- code
close(codeCh)
}()
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g := &game{
m: m,
endCh: endCh,
}
if err := ebiten.RunGame(g); err != nil && !errors.Is(err, regularTermination) {
panic(err)
}
os.Exit(<-codeCh)
}
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type testResult struct {
want color.RGBA
got <-chan color.RGBA
}
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var testSetBeforeMainResult = func() testResult {
clr := color.RGBA{1, 2, 3, 4}
img := ebiten.NewImage(16, 16)
img.Set(0, 0, clr)
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ch := make(chan color.RGBA, 1)
go func() {
runOnMainThread(func() {
ch <- img.At(0, 0).(color.RGBA)
})
}()
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return testResult{
want: clr,
got: ch,
}
}()
func TestSetBeforeMain(t *testing.T) {
got := <-testSetBeforeMainResult.got
want := testSetBeforeMainResult.want
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
var testDrawImageBeforeMainResult = func() testResult {
const w, h = 16, 16
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
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src.Set(0, 0, color.White)
dst.DrawImage(src, nil)
ch := make(chan color.RGBA, 1)
go func() {
runOnMainThread(func() {
ch <- dst.At(0, 0).(color.RGBA)
})
}()
return testResult{
want: color.RGBA{0xff, 0xff, 0xff, 0xff},
got: ch,
}
}()
func TestDrawImageBeforeMain(t *testing.T) {
got := <-testDrawImageBeforeMainResult.got
want := testDrawImageBeforeMainResult.want
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
var testDrawTrianglesBeforeMainResult = func() testResult {
const w, h = 16, 16
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
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src.Set(0, 0, color.White)
vs := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
dst.DrawTriangles(vs, []uint16{0, 1, 2}, src, nil)
ch := make(chan color.RGBA, 1)
go func() {
runOnMainThread(func() {
ch <- dst.At(0, 0).(color.RGBA)
})
}()
return testResult{
want: color.RGBA{0xff, 0xff, 0xff, 0xff},
got: ch,
}
}()
func TestDrawTrianglesBeforeMain(t *testing.T) {
got := <-testDrawTrianglesBeforeMainResult.got
want := testDrawTrianglesBeforeMainResult.want
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
var testSetAndFillBeforeMainResult = func() testResult {
clr := color.RGBA{1, 2, 3, 4}
img := ebiten.NewImage(16, 16)
img.Set(0, 0, clr)
img.Fill(color.RGBA{5, 6, 7, 8})
img.Set(1, 0, clr)
ch := make(chan color.RGBA, 1)
go func() {
runOnMainThread(func() {
ch <- img.At(0, 0).(color.RGBA)
})
}()
return testResult{
want: color.RGBA{5, 6, 7, 8},
got: ch,
}
}()
func TestSetAndFillBeforeMain(t *testing.T) {
got := <-testSetAndFillBeforeMainResult.got
want := testSetAndFillBeforeMainResult.want
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
var testSetAndWritePixelsBeforeMainResult = func() testResult {
clr := color.RGBA{1, 2, 3, 4}
img := ebiten.NewImage(16, 16)
img.Set(0, 0, clr)
pix := make([]byte, 4*16*16)
for i := 0; i < len(pix)/4; i++ {
pix[4*i] = 5
pix[4*i+1] = 6
pix[4*i+2] = 7
pix[4*i+3] = 8
}
img.WritePixels(pix)
img.Set(1, 0, clr)
ch := make(chan color.RGBA, 1)
go func() {
runOnMainThread(func() {
ch <- img.At(0, 0).(color.RGBA)
})
}()
return testResult{
want: color.RGBA{5, 6, 7, 8},
got: ch,
}
}()
func TestSetAndWritePixelsBeforeMain(t *testing.T) {
got := <-testSetAndWritePixelsBeforeMainResult.got
want := testSetAndWritePixelsBeforeMainResult.want
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
var testWritePixelsAndModifyBeforeMainResult = func() testResult {
img := ebiten.NewImage(16, 16)
pix := make([]byte, 4*16*16)
for i := 0; i < len(pix)/4; i++ {
pix[4*i] = 1
pix[4*i+1] = 2
pix[4*i+2] = 3
pix[4*i+3] = 4
}
img.WritePixels(pix)
// After calling WritePixels, modifying pix must not affect the result.
for i := 0; i < len(pix)/4; i++ {
pix[4*i] = 5
pix[4*i+1] = 6
pix[4*i+2] = 7
pix[4*i+3] = 8
}
ch := make(chan color.RGBA, 1)
go func() {
runOnMainThread(func() {
ch <- img.At(0, 0).(color.RGBA)
})
}()
return testResult{
want: color.RGBA{1, 2, 3, 4},
got: ch,
}
}()
func TestWritePixelsAndModifyBeforeMain(t *testing.T) {
got := <-testWritePixelsAndModifyBeforeMainResult.got
want := testWritePixelsAndModifyBeforeMainResult.want
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
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// TODO: Add tests for shaders and WritePixels to check resolvePendingPiexles works correctly.