ebiten/examples/fullscreen/main.go
2023-12-24 15:06:19 +09:00

121 lines
3.2 KiB
Go

// Copyright 2018 The Ebiten 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.
package main
import (
"bytes"
"fmt"
"image"
"image/color"
_ "image/jpeg"
"log"
"math"
"runtime"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/examples/resources/fonts"
"github.com/hajimehoshi/ebiten/v2/examples/resources/images"
"github.com/hajimehoshi/ebiten/v2/inpututil"
"github.com/hajimehoshi/ebiten/v2/text/v2"
)
var (
gophersImage *ebiten.Image
mplusFaceSource *text.GoTextFaceSource
)
func init() {
// Decode an image from the image file's byte slice.
img, _, err := image.Decode(bytes.NewReader(images.Gophers_jpg))
if err != nil {
log.Fatal(err)
}
gophersImage = ebiten.NewImageFromImage(img)
}
func init() {
s, err := text.NewGoTextFaceSource(bytes.NewReader(fonts.MPlus1pRegular_ttf))
if err != nil {
log.Fatal(err)
}
mplusFaceSource = s
}
type Game struct {
count int
}
func (g *Game) Update() error {
g.count++
if runtime.GOOS == "js" {
if ebiten.IsKeyPressed(ebiten.KeyF) || len(inpututil.AppendJustPressedTouchIDs(nil)) > 0 {
ebiten.SetFullscreen(true)
}
}
if runtime.GOOS != "js" && ebiten.IsKeyPressed(ebiten.KeyQ) {
return ebiten.Termination
}
return nil
}
func (g *Game) Draw(screen *ebiten.Image) {
scale := ebiten.DeviceScaleFactor()
w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
op.GeoM.Scale(scale, scale)
op.GeoM.Rotate(float64(g.count%360) * 2 * math.Pi / 360)
sw, sh := screen.Bounds().Dx(), screen.Bounds().Dy()
op.GeoM.Translate(float64(sw)/2, float64(sh)/2)
op.Filter = ebiten.FilterLinear
screen.DrawImage(gophersImage, op)
fw, fh := ebiten.ScreenSizeInFullscreen()
msg := "This is an example of the finest fullscreen.\n"
if runtime.GOOS == "js" {
msg += "Press F or touch the screen to enter fullscreen (again).\n"
} else {
msg += "Press Q to quit.\n"
}
msg += fmt.Sprintf("Screen size in fullscreen: %d, %d\n", fw, fh)
msg += fmt.Sprintf("Game's screen size: %d, %d\n", sw, sh)
msg += fmt.Sprintf("Device scale factor: %0.2f\n", scale)
textOp := &text.DrawOptions{}
textOp.GeoM.Translate(50*scale, 50*scale)
textOp.ColorScale.ScaleWithColor(color.White)
textOp.LineSpacing = 12 * ebiten.DeviceScaleFactor() * 1.5
text.Draw(screen, msg, &text.GoTextFace{
Source: mplusFaceSource,
Size: 12 * ebiten.DeviceScaleFactor(),
}, textOp)
}
func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
s := ebiten.DeviceScaleFactor()
return int(float64(outsideWidth) * s), int(float64(outsideHeight) * s)
}
func main() {
ebiten.SetFullscreen(true)
ebiten.SetWindowTitle("Fullscreen (Ebitengine Demo)")
if err := ebiten.RunGame(&Game{}); err != nil {
log.Fatal(err)
}
}