ebiten/internal/shareable/shareable_test.go

110 lines
2.9 KiB
Go

// 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"
"testing"
"github.com/hajimehoshi/ebiten"
"github.com/hajimehoshi/ebiten/internal/graphics"
"github.com/hajimehoshi/ebiten/internal/opengl"
. "github.com/hajimehoshi/ebiten/internal/shareable"
"github.com/hajimehoshi/ebiten/internal/testflock"
)
func TestMain(m *testing.M) {
testflock.Lock()
defer testflock.Unlock()
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) {
// 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.Dispose()
// Ensure img1's region is allocated.
img1.ReplacePixels(make([]byte, 4*bigSize*100))
img2 := NewImage(100, bigSize)
defer img2.Dispose()
img2.ReplacePixels(make([]byte, 4*100*bigSize))
const size = 32
img3 := NewImage(size/2, size/2)
defer img3.Dispose()
img3.ReplacePixels(make([]byte, (size/2)*(size/2)*4))
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.
img4.DrawImage(img3, 0, 0, size/2, size/2, 1, 0, 0, 1, size/4, size/4, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
for j := 0; j < size; j++ {
for i := 0; i < size; i++ {
got, err := img4.At(i, j)
if err != nil {
t.Fatal(err)
}
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)
}
}
}
// Check further drawing doesn't cause panic.
// This bug was fixed by 03dcd948.
img4.DrawImage(img3, 0, 0, size/2, size/2, 1, 0, 0, 1, size/4, size/4, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
}