mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-14 15:07:26 +01:00
120 lines
3.0 KiB
Go
120 lines
3.0 KiB
Go
// Copyright 2018 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package shareable_test
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import (
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"errors"
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"image/color"
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"os"
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"testing"
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"github.com/hajimehoshi/ebiten"
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"github.com/hajimehoshi/ebiten/internal/graphics"
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"github.com/hajimehoshi/ebiten/internal/opengl"
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. "github.com/hajimehoshi/ebiten/internal/shareable"
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"github.com/hajimehoshi/ebiten/internal/testflock"
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)
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func TestMain(m *testing.M) {
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testflock.Lock()
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defer testflock.Unlock()
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code := 0
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regularTermination := errors.New("regular termination")
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f := func(screen *ebiten.Image) error {
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code = m.Run()
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return regularTermination
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}
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if err := ebiten.Run(f, 320, 240, 1, "Test"); err != nil && err != regularTermination {
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panic(err)
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}
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os.Exit(code)
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}
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const bigSize = 2049
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type geoM struct {
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tx float32
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ty float32
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}
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func (g *geoM) Apply(x, y float32) (x2, y2 float32) {
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return x + g.tx, y + g.ty
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}
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func TestEnsureNotShared(t *testing.T) {
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// Create img1 and img2 with this size so that the next images are allocated
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// with non-upper-left location.
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img1 := NewImage(bigSize, 100)
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defer img1.Dispose()
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// Ensure img1's region is allocated.
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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
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img3 := NewImage(size/2, size/2)
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defer img3.Dispose()
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img3.ReplacePixels(make([]byte, (size/2)*(size/2)*4))
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img4 := NewImage(size, size)
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defer img4.Dispose()
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pix := make([]byte, size*size*4)
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for j := 0; j < size; j++ {
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for i := 0; i < size; i++ {
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pix[4*(i+j*size)] = byte(i + j)
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pix[4*(i+j*size)+1] = byte(i + j)
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pix[4*(i+j*size)+2] = byte(i + j)
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pix[4*(i+j*size)+3] = byte(i + j)
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}
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}
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img4.ReplacePixels(pix)
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const (
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dx0 = size / 4
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dy0 = size / 4
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dx1 = size * 3 / 4
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dy1 = size * 3 / 4
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)
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// img4.ensureNotShared() should be called.
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geom := &geoM{size / 4, size / 4}
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img4.DrawImage(img3, 0, 0, size/2, size/2, geom, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
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for j := 0; j < size; j++ {
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for i := 0; i < size; i++ {
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got, err := img4.At(i, j)
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if err != nil {
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t.Fatal(err)
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}
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var want color.RGBA
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if i < dx0 || dx1 <= i || j < dy0 || dy1 <= j {
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c := byte(i + j)
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want = color.RGBA{c, c, c, c}
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}
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if got != want {
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t.Errorf("img4.At(%d, %d): got: %v, want: %v", i, j, got, want)
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}
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}
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}
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// Check further drawing doesn't cause panic.
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// This bug was fixed by 03dcd948.
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img4.DrawImage(img3, 0, 0, size/2, size/2, geom, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
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}
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