mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 13:22:19 +02:00
109 lines
2.3 KiB
Go
109 lines
2.3 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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// +build example
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// This example is just to check if Ebiten 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"
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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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keyStates = map[ebiten.Key]int{
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ebiten.KeyS: 0,
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ebiten.KeyF: 0,
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}
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)
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var (
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dots []uint8
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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) []uint8 {
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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([]uint8, 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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func update(screen *ebiten.Image) error {
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for key := range keyStates {
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if !ebiten.IsKeyPressed(key) {
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keyStates[key] = 0
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continue
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}
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keyStates[key]++
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}
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screenScale := ebiten.ScreenScale()
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fullscreen := ebiten.IsFullscreen()
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if keyStates[ebiten.KeyS] == 1 {
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switch screenScale {
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case 1:
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screenScale = 1.5
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case 1.5:
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screenScale = 2
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case 2:
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screenScale = 1
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default:
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panic("not reached")
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}
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}
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if keyStates[ebiten.KeyF] == 1 {
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fullscreen = !fullscreen
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}
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ebiten.SetScreenScale(screenScale)
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ebiten.SetFullscreen(fullscreen)
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if ebiten.IsRunningSlowly() {
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return nil
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}
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screen.ReplacePixels(getDots(screen.Size()))
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return nil
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}
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func main() {
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if err := ebiten.Run(update, screenWidth, screenHeight, initScreenScale, "Moire (Ebiten Demo)"); err != nil {
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log.Fatal(err)
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}
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}
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