mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-27 04:08:53 +01:00
118 lines
2.8 KiB
Go
118 lines
2.8 KiB
Go
// Copyright 2022 The Ebitengine 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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//go:build ignore
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package main
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import (
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"fmt"
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"image/color"
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"github.com/hajimehoshi/ebiten/v2"
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)
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var srcInit *ebiten.Image
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func init() {
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const (
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w = 2
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h = 2
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)
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// src2 := ebiten.NewImage(1, 1)
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src0 := ebiten.NewImage(w, h)
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src0.Fill(color.RGBA{0xff, 0xff, 0xff, 0xff})
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src0.Set(0, 0, color.RGBA{0, 0, 0, 0xff})
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src0.Set(0, 1, color.RGBA{0, 0, 0, 0xff})
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src0.Set(1, 0, color.RGBA{0, 0, 0, 0xff})
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src1 := ebiten.NewImage(w, h)
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// Using the image as a source just after Set caused troubles on Metal.
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// For example, inserting src1.Fill(color.RGBA{0, 0xff, 0, 0xff}) here hid the error.
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src1.DrawImage(src0, nil)
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srcInit = src1
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}
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type Game struct {
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count int
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dst *ebiten.Image
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}
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func (g *Game) Update() error {
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g.count++
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if g.count == 16 {
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return ebiten.Termination
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}
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return nil
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}
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func (g *Game) Draw(screen *ebiten.Image) {
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screen.Fill(color.RGBA{0xff, 0xff, 0xff, 0xff})
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screen.DrawImage(srcInit, nil)
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if g.dst == nil {
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g.dst = ebiten.NewImage(screen.Size())
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return
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}
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g.dst.DrawImage(screen, nil)
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if got, want := g.dst.At(0, 0), (color.RGBA{0, 0, 0, 0xff}); got != want {
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panic(fmt.Sprintf("count: %d, got: %v, want: %v", g.count, got, want))
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}
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if got, want := g.dst.At(1, 1), (color.RGBA{0xff, 0xff, 0xff, 0xff}); got != want {
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panic(fmt.Sprintf("count: %d, got: %v, want: %v", g.count, got, want))
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}
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g.dst.Clear()
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const (
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w = 2
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h = 2
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)
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src0 := ebiten.NewImage(w, h)
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defer src0.Dispose()
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src0.Fill(color.RGBA{0xff, 0xff, 0xff, 0xff})
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src0.Set(0, 0, color.RGBA{0, 0, 0, 0xff})
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src0.Set(0, 1, color.RGBA{0, 0, 0, 0xff})
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src0.Set(1, 0, color.RGBA{0, 0, 0, 0xff})
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src1 := ebiten.NewImage(w, h)
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defer src1.Dispose()
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src1.DrawImage(src0, nil)
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screen.Fill(color.RGBA{0xff, 0xff, 0xff, 0xff})
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screen.DrawImage(src1, nil)
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g.dst.DrawImage(screen, nil)
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if got, want := g.dst.At(0, 0), (color.RGBA{0, 0, 0, 0xff}); got != want {
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panic(fmt.Sprintf("count: %d, got: %v, want: %v", g.count, got, want))
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}
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if got, want := g.dst.At(1, 1), (color.RGBA{0xff, 0xff, 0xff, 0xff}); got != want {
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panic(fmt.Sprintf("count: %d, got: %v, want: %v", g.count, got, want))
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}
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}
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func (g *Game) Layout(width, height int) (int, int) {
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return width, height
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}
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func main() {
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if err := ebiten.RunGame(&Game{}); err != nil {
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panic(err)
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}
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}
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