mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-14 15:07:26 +01:00
118 lines
2.9 KiB
Go
118 lines
2.9 KiB
Go
// 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
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"image/color"
|
|
|
|
"github.com/hajimehoshi/ebiten/v2"
|
|
)
|
|
|
|
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 ebiten.Termination
|
|
}
|
|
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.Bounds().Dx(), screen.Bounds().Dy())
|
|
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 {
|
|
panic(err)
|
|
}
|
|
}
|