ebiten/internal/processtest/testdata/issue2154_1.go

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// Copyright 2022 The Ebitengine 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.
//go:build ignore
// +build ignore
package main
import (
"errors"
"fmt"
"image/color"
"github.com/hajimehoshi/ebiten/v2"
)
var regularTermination = errors.New("regular termination")
var srcInit *ebiten.Image
func init() {
const (
w = 2
h = 2
)
//src2 := ebiten.NewImage(1, 1)
src0 := ebiten.NewImage(w, h)
src0.Fill(color.RGBA{0xff, 0xff, 0xff, 0xff})
src0.Set(0, 0, color.RGBA{0, 0, 0, 0xff})
src0.Set(0, 1, color.RGBA{0, 0, 0, 0xff})
src0.Set(1, 0, color.RGBA{0, 0, 0, 0xff})
src1 := ebiten.NewImage(w, h)
// Using the image as a source just after Set caused troubles on Metal.
// For example, inserting src1.Fill(color.RGBA{0, 0xff, 0, 0xff}) here hid the error.
src1.DrawImage(src0, nil)
srcInit = src1
}
type Game struct {
count int
dst *ebiten.Image
}
func (g *Game) Update() error {
g.count++
if g.count == 16 {
return regularTermination
}
return nil
}
func (g *Game) Draw(screen *ebiten.Image) {
screen.Fill(color.RGBA{0xff, 0xff, 0xff, 0xff})
screen.DrawImage(srcInit, nil)
if g.dst == nil {
g.dst = ebiten.NewImage(screen.Size())
return
}
g.dst.DrawImage(screen, nil)
if got, want := g.dst.At(0, 0), (color.RGBA{0, 0, 0, 0xff}); got != want {
panic(fmt.Sprintf("count: %d, got: %v, want: %v", g.count, got, want))
}
if got, want := g.dst.At(1, 1), (color.RGBA{0xff, 0xff, 0xff, 0xff}); got != want {
panic(fmt.Sprintf("count: %d, got: %v, want: %v", g.count, got, want))
}
g.dst.Clear()
const (
w = 2
h = 2
)
src0 := ebiten.NewImage(w, h)
defer src0.Dispose()
src0.Fill(color.RGBA{0xff, 0xff, 0xff, 0xff})
src0.Set(0, 0, color.RGBA{0, 0, 0, 0xff})
src0.Set(0, 1, color.RGBA{0, 0, 0, 0xff})
src0.Set(1, 0, color.RGBA{0, 0, 0, 0xff})
src1 := ebiten.NewImage(w, h)
defer src1.Dispose()
src1.DrawImage(src0, nil)
screen.Fill(color.RGBA{0xff, 0xff, 0xff, 0xff})
screen.DrawImage(src1, nil)
g.dst.DrawImage(screen, nil)
if got, want := g.dst.At(0, 0), (color.RGBA{0, 0, 0, 0xff}); got != want {
panic(fmt.Sprintf("count: %d, got: %v, want: %v", g.count, got, want))
}
if got, want := g.dst.At(1, 1), (color.RGBA{0xff, 0xff, 0xff, 0xff}); got != want {
panic(fmt.Sprintf("count: %d, got: %v, want: %v", g.count, got, want))
}
}
func (g *Game) Layout(width, height int) (int, int) {
return width, height
}
func main() {
if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
panic(err)
}
}