mirror of
https://github.com/hajimehoshi/ebiten.git
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108 lines
2.4 KiB
Go
108 lines
2.4 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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// This example is just to check if Ebitengine can draw fine checker pattern evenly.
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// If there is something wrong in the implementation, the result might include
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// uneven patterns (#459).
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package main
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import (
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"log"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/inpututil"
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)
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const (
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screenWidth = 640
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screenHeight = 480
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initScreenScale = 1
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)
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var (
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dots []byte
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dotsWidth int
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dotsHeight int
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)
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func getDots(width, height int) []byte {
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if dotsWidth == width && dotsHeight == height {
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return dots
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}
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dotsWidth = width
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dotsHeight = height
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dots = make([]byte, width*height*4)
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for j := 0; j < height; j++ {
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for i := 0; i < width; i++ {
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if (i+j)%2 == 0 {
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dots[(i+j*width)*4+0] = 0xff
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dots[(i+j*width)*4+1] = 0xff
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dots[(i+j*width)*4+2] = 0xff
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dots[(i+j*width)*4+3] = 0xff
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}
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}
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}
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return dots
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}
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type game struct {
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scale float64
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}
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func (g *game) Layout(outsideWidth, outsideHeight int) (int, int) {
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return screenWidth, screenHeight
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}
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func (g *game) Update() error {
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fullscreen := ebiten.IsFullscreen()
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if inpututil.IsKeyJustPressed(ebiten.KeyS) {
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switch g.scale {
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case 0.5:
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g.scale = 1
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case 1:
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g.scale = 1.5
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case 1.5:
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g.scale = 2
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case 2:
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g.scale = 0.5
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default:
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panic("not reached")
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}
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ebiten.SetWindowSize(int(screenWidth*g.scale), int(screenHeight*g.scale))
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}
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if inpututil.IsKeyJustPressed(ebiten.KeyF) {
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fullscreen = !fullscreen
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ebiten.SetFullscreen(fullscreen)
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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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s := screen.Bounds().Size()
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screen.WritePixels(getDots(s.X, s.Y))
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}
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func main() {
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g := &game{
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scale: initScreenScale,
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}
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ebiten.SetWindowSize(screenWidth*initScreenScale, screenHeight*initScreenScale)
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ebiten.SetWindowTitle("Moire (Ebitengine Demo)")
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ebiten.SetWindowResizable(true)
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if err := ebiten.RunGame(g); err != nil {
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log.Fatal(err)
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}
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}
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