mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
134 lines
3.5 KiB
Go
134 lines
3.5 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.
|
|
|
|
// +build example jsgo
|
|
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"image"
|
|
"image/color"
|
|
_ "image/jpeg"
|
|
"log"
|
|
"math"
|
|
|
|
"github.com/golang/freetype/truetype"
|
|
"golang.org/x/image/font"
|
|
|
|
"github.com/hajimehoshi/ebiten"
|
|
"github.com/hajimehoshi/ebiten/examples/resources/fonts"
|
|
"github.com/hajimehoshi/ebiten/examples/resources/images"
|
|
"github.com/hajimehoshi/ebiten/text"
|
|
)
|
|
|
|
var (
|
|
count = 0
|
|
gophersImage *ebiten.Image
|
|
mplusFont font.Face
|
|
regularTermination = errors.New("regular termination")
|
|
)
|
|
|
|
func init() {
|
|
// Decode image from a byte slice instead of a file so that
|
|
// this example works in any working directory.
|
|
// If you want to use a file, there are some options:
|
|
// 1) Use os.Open and pass the file to the image decoder.
|
|
// This is a very regular way, but doesn't work on browsers.
|
|
// 2) Use ebitenutil.OpenFile and pass the file to the image decoder.
|
|
// This works even on browsers.
|
|
// 3) Use ebitenutil.NewImageFromFile to create an ebiten.Image directly from a file.
|
|
// This also works on browsers.
|
|
img, _, err := image.Decode(bytes.NewReader(images.Gophers_jpg))
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
gophersImage, _ = ebiten.NewImageFromImage(img, ebiten.FilterDefault)
|
|
}
|
|
|
|
func initFont() {
|
|
tt, err := truetype.Parse(fonts.MPlus1pRegular_ttf)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
const dpi = 72
|
|
mplusFont = truetype.NewFace(tt, &truetype.Options{
|
|
Size: 12 * ebiten.DeviceScaleFactor(),
|
|
DPI: dpi,
|
|
Hinting: font.HintingFull,
|
|
})
|
|
}
|
|
|
|
func update(screen *ebiten.Image) error {
|
|
count++
|
|
|
|
if ebiten.IsKeyPressed(ebiten.KeyQ) {
|
|
return regularTermination
|
|
}
|
|
|
|
if ebiten.IsDrawingSkipped() {
|
|
return nil
|
|
}
|
|
|
|
scale := ebiten.DeviceScaleFactor()
|
|
|
|
w, h := gophersImage.Size()
|
|
op := &ebiten.DrawImageOptions{}
|
|
|
|
op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
|
|
op.GeoM.Scale(scale, scale)
|
|
op.GeoM.Rotate(float64(count%360) * 2 * math.Pi / 360)
|
|
sw, sh := screen.Size()
|
|
op.GeoM.Translate(float64(sw)/2, float64(sh)/2)
|
|
op.Filter = ebiten.FilterLinear
|
|
screen.DrawImage(gophersImage, op)
|
|
|
|
mw, mh := ebiten.MonitorSize()
|
|
msgs := []string{
|
|
"This is an example of the finest fullscreen. Press Q to quit.",
|
|
fmt.Sprintf("Monitor size: %d, %d", mw, mh),
|
|
fmt.Sprintf("Game's screen size: %d, %d", sw, sh),
|
|
fmt.Sprintf("Device scale factor: %0.2f", scale),
|
|
}
|
|
|
|
for i, msg := range msgs {
|
|
text.Draw(screen, msg, mplusFont, 100, 100+int(float64(i)*16*scale), color.White)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func main() {
|
|
// Call initFont here instead of init funcs since ebiten.DeviceScaleFactor is not available in init.
|
|
initFont()
|
|
|
|
ebiten.SetFullscreen(true)
|
|
|
|
w, h := ebiten.MonitorSize()
|
|
// On mobiles, ebiten.MonitorSize is not available so far.
|
|
// Use arbitrary values.
|
|
if w == 0 || h == 0 {
|
|
w = 300
|
|
h = 450
|
|
}
|
|
|
|
s := ebiten.DeviceScaleFactor()
|
|
if err := ebiten.Run(update, int(float64(w)*s), int(float64(h)*s), 1/s, "Rotate (Ebiten Demo)"); err != nil && err != regularTermination {
|
|
log.Fatal(err)
|
|
}
|
|
}
|