mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-13 22:47:26 +01:00
102 lines
2.4 KiB
Go
102 lines
2.4 KiB
Go
// Copyright 2015 Hajime Hoshi
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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 example
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// +build example
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package main
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import (
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"bytes"
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"image"
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_ "image/png"
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"log"
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"strings"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/ebitenutil"
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"github.com/hajimehoshi/ebiten/v2/examples/keyboard/keyboard"
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rkeyboard "github.com/hajimehoshi/ebiten/v2/examples/resources/images/keyboard"
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"github.com/hajimehoshi/ebiten/v2/inpututil"
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)
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const (
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screenWidth = 320
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screenHeight = 240
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)
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var keyboardImage *ebiten.Image
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func init() {
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img, _, err := image.Decode(bytes.NewReader(rkeyboard.Keyboard_png))
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if err != nil {
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log.Fatal(err)
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}
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keyboardImage = ebiten.NewImageFromImage(img)
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}
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type Game struct {
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keys []ebiten.Key
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}
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func (g *Game) Update() error {
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g.keys = inpututil.AppendPressedKeys(g.keys[:0])
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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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const (
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offsetX = 24
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offsetY = 40
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)
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// Draw the base (grayed) keyboard image.
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op := &ebiten.DrawImageOptions{}
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op.GeoM.Translate(offsetX, offsetY)
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op.ColorM.Scale(0.5, 0.5, 0.5, 1)
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screen.DrawImage(keyboardImage, op)
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// Draw the highlighted keys.
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op = &ebiten.DrawImageOptions{}
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for _, p := range g.keys {
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op.GeoM.Reset()
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r, ok := keyboard.KeyRect(p)
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if !ok {
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continue
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}
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op.GeoM.Translate(float64(r.Min.X), float64(r.Min.Y))
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op.GeoM.Translate(offsetX, offsetY)
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screen.DrawImage(keyboardImage.SubImage(r).(*ebiten.Image), op)
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}
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keyStrs := []string{}
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for _, p := range g.keys {
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keyStrs = append(keyStrs, p.String())
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}
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ebitenutil.DebugPrint(screen, strings.Join(keyStrs, ", "))
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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 main() {
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ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
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ebiten.SetWindowTitle("Keyboard (Ebiten Demo)")
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if err := ebiten.RunGame(&Game{}); err != nil {
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log.Fatal(err)
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}
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}
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