mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-26 11:48:55 +01:00
385 lines
9.2 KiB
Go
385 lines
9.2 KiB
Go
// Copyright 2017 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 restorable_test
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import (
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"errors"
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"image"
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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/affine"
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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/restorable"
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)
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func TestMain(m *testing.M) {
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EnableRestoringForTesting()
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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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func byteSliceToColor(b []byte, index int) color.RGBA {
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i := index * 4
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return color.RGBA{b[i], b[i+1], b[i+2], b[i+3]}
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}
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func abs(x int) int {
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if x < 0 {
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return -x
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}
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return x
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}
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// sameColors compares c1 and c2 and returns a boolean value indicating
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// if the two colors are (almost) same.
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//
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// Pixels read from GPU might include errors (#492), and
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// sameColors considers such errors as delta.
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func sameColors(c1, c2 color.RGBA, delta int) bool {
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return abs(int(c1.R)-int(c2.R)) <= delta &&
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abs(int(c1.G)-int(c2.G)) <= delta &&
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abs(int(c1.B)-int(c2.B)) <= delta &&
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abs(int(c1.A)-int(c2.A)) <= delta
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}
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func fill(img *Image, r, g, b, a uint8) {
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w, h := img.Size()
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pix := make([]uint8, w*h*4)
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for i := 0; i < w*h; i++ {
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pix[4*i] = r
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pix[4*i+1] = g
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pix[4*i+2] = b
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pix[4*i+3] = a
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}
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img.ReplacePixels(pix)
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}
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func TestRestore(t *testing.T) {
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img0 := NewImage(1, 1, false)
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// Clear images explicitly.
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// In this 'restorable' layer, reused texture might not be cleared.
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fill(img0, 0, 0, 0, 0)
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defer func() {
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img0.Dispose()
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}()
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clr0 := color.RGBA{0x00, 0x00, 0x00, 0xff}
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fill(img0, clr0.R, clr0.G, clr0.B, clr0.A)
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if err := ResolveStaleImages(); err != nil {
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t.Fatal(err)
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}
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if err := Restore(); err != nil {
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t.Fatal(err)
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}
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want := clr0
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got := byteSliceToColor(img0.BasePixelsForTesting(), 0)
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if !sameColors(got, want, 1) {
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t.Errorf("got %v, want %v", got, want)
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}
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}
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func vertices(sw, sh int, x, y int) []float32 {
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swf := float32(sw)
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shf := float32(sh)
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tx := float32(x)
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ty := float32(y)
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// For the rule of values, see vertices.go.
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return []float32{
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0 + tx, 0 + ty, 0, 0, 1, 1,
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swf + tx, 0 + ty, 1, 0, 0, 1,
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0 + tx, shf + ty, 0, 1, 1, 0,
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swf + tx, shf + ty, 1, 1, 0, 0,
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}
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}
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func TestRestoreChain(t *testing.T) {
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const num = 10
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imgs := []*Image{}
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for i := 0; i < num; i++ {
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img := NewImage(1, 1, false)
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fill(img, 0, 0, 0, 0)
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imgs = append(imgs, img)
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}
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defer func() {
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for _, img := range imgs {
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img.Dispose()
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}
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}()
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clr := color.RGBA{0x00, 0x00, 0x00, 0xff}
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fill(imgs[0], clr.R, clr.G, clr.B, clr.A)
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for i := 0; i < num-1; i++ {
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imgs[i+1].DrawImage(imgs[i], 0, 0, 1, 1, nil, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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}
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if err := ResolveStaleImages(); err != nil {
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t.Fatal(err)
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}
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if err := Restore(); err != nil {
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t.Fatal(err)
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}
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want := clr
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for i, img := range imgs {
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got := byteSliceToColor(img.BasePixelsForTesting(), 0)
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if !sameColors(got, want, 1) {
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t.Errorf("%d: got %v, want %v", i, got, want)
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}
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}
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}
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func TestRestoreOverrideSource(t *testing.T) {
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img0 := NewImage(1, 1, false)
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fill(img0, 0, 0, 0, 0)
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img1 := NewImage(1, 1, false)
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fill(img1, 0, 0, 0, 0)
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img2 := NewImage(1, 1, false)
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fill(img2, 0, 0, 0, 0)
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img3 := NewImage(1, 1, false)
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fill(img3, 0, 0, 0, 0)
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defer func() {
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img3.Dispose()
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img2.Dispose()
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img1.Dispose()
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img0.Dispose()
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}()
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clr0 := color.RGBA{0x00, 0x00, 0x00, 0xff}
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clr1 := color.RGBA{0x00, 0x00, 0x01, 0xff}
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fill(img1, clr0.R, clr0.G, clr0.B, clr0.A)
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img2.DrawImage(img1, 0, 0, 1, 1, nil, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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img3.DrawImage(img2, 0, 0, 1, 1, nil, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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fill(img0, clr1.R, clr1.G, clr1.B, clr1.A)
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img1.DrawImage(img0, 0, 0, 1, 1, nil, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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if err := ResolveStaleImages(); err != nil {
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t.Fatal(err)
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}
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if err := Restore(); err != nil {
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t.Fatal(err)
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}
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testCases := []struct {
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name string
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want color.RGBA
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got color.RGBA
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}{
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{
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"0",
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clr1,
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byteSliceToColor(img0.BasePixelsForTesting(), 0),
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},
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{
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"1",
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clr1,
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byteSliceToColor(img1.BasePixelsForTesting(), 0),
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},
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{
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"2",
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clr0,
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byteSliceToColor(img2.BasePixelsForTesting(), 0),
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},
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{
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"3",
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clr0,
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byteSliceToColor(img3.BasePixelsForTesting(), 0),
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},
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}
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for _, c := range testCases {
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if !sameColors(c.got, c.want, 1) {
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t.Errorf("%s: got %v, want %v", c.name, c.got, c.want)
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}
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}
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}
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func TestRestoreComplexGraph(t *testing.T) {
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// 0 -> 3
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// 1 -> 3
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// 1 -> 4
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// 2 -> 4
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// 2 -> 7
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// 3 -> 5
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// 3 -> 6
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// 3 -> 7
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// 4 -> 6
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base := image.NewRGBA(image.Rect(0, 0, 4, 1))
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base.Pix[0] = 0xff
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base.Pix[1] = 0xff
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base.Pix[2] = 0xff
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base.Pix[3] = 0xff
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img0 := newImageFromImage(base)
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img1 := newImageFromImage(base)
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img2 := newImageFromImage(base)
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img3 := NewImage(4, 1, false)
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fill(img3, 0, 0, 0, 0)
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img4 := NewImage(4, 1, false)
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fill(img4, 0, 0, 0, 0)
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img5 := NewImage(4, 1, false)
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fill(img5, 0, 0, 0, 0)
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img6 := NewImage(4, 1, false)
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fill(img6, 0, 0, 0, 0)
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img7 := NewImage(4, 1, false)
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fill(img7, 0, 0, 0, 0)
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defer func() {
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img7.Dispose()
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img6.Dispose()
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img5.Dispose()
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img4.Dispose()
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img3.Dispose()
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img2.Dispose()
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img1.Dispose()
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img0.Dispose()
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}()
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img3.DrawImage(img0, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(0, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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img3.DrawImage(img1, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(1, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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img4.DrawImage(img1, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(1, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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img4.DrawImage(img2, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(2, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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img5.DrawImage(img3, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(0, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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img6.DrawImage(img3, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(0, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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img6.DrawImage(img4, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(1, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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img7.DrawImage(img2, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(0, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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img7.DrawImage(img3, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(2, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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if err := ResolveStaleImages(); err != nil {
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t.Fatal(err)
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}
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if err := Restore(); err != nil {
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t.Fatal(err)
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}
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testCases := []struct {
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name string
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out string
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image *Image
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}{
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{
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"0",
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"*---",
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img0,
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},
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{
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"1",
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"*---",
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img1,
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},
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{
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"2",
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"*---",
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img2,
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},
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{
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"3",
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"**--",
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img3,
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},
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{
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"4",
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"-**-",
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img4,
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},
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{
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"5",
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"**--",
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img5,
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},
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{
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"6",
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"****",
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img6,
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},
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{
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"7",
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"*-**",
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img7,
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},
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}
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for _, c := range testCases {
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for i := 0; i < 4; i++ {
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want := color.RGBA{}
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if c.out[i] == '*' {
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want = color.RGBA{0xff, 0xff, 0xff, 0xff}
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}
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got := byteSliceToColor(c.image.BasePixelsForTesting(), i)
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if !sameColors(got, want, 1) {
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t.Errorf("%s[%d]: got %v, want %v", c.name, i, got, want)
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}
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}
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}
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}
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func newImageFromImage(rgba *image.RGBA) *Image {
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s := rgba.Bounds().Size()
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img := NewImage(s.X, s.Y, false)
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img.ReplacePixels(rgba.Pix)
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return img
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}
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func TestRestoreRecursive(t *testing.T) {
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base := image.NewRGBA(image.Rect(0, 0, 4, 1))
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base.Pix[0] = 0xff
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base.Pix[1] = 0xff
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base.Pix[2] = 0xff
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base.Pix[3] = 0xff
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img0 := newImageFromImage(base)
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img1 := NewImage(4, 1, false)
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fill(img1, 0, 0, 0, 0)
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defer func() {
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img1.Dispose()
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img0.Dispose()
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}()
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img1.DrawImage(img0, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(1, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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img0.DrawImage(img1, 0, 0, 4, 1, (*affine.GeoM)(nil).Translate(1, 0), nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
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if err := ResolveStaleImages(); err != nil {
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t.Fatal(err)
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}
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if err := Restore(); err != nil {
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t.Fatal(err)
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}
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testCases := []struct {
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name string
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out string
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image *Image
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}{
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{
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"0",
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"*-*-",
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img0,
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},
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{
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"1",
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"-*--",
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img1,
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},
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}
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for _, c := range testCases {
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for i := 0; i < 4; i++ {
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want := color.RGBA{}
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if c.out[i] == '*' {
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want = color.RGBA{0xff, 0xff, 0xff, 0xff}
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}
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got := byteSliceToColor(c.image.BasePixelsForTesting(), i)
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if !sameColors(got, want, 1) {
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t.Errorf("%s[%d]: got %v, want %v", c.name, i, got, want)
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}
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}
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}
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}
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// TODO: How about volatile/screen images?
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