mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 21:32:20 +02:00
64 lines
1.7 KiB
Go
64 lines
1.7 KiB
Go
// Copyright 2014 Hajime Hoshi
|
|
//
|
|
// 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 (
|
|
"github.com/hajimehoshi/ebiten"
|
|
"github.com/hajimehoshi/ebiten/ebitenutil"
|
|
"image"
|
|
_ "image/jpeg"
|
|
"log"
|
|
)
|
|
|
|
const (
|
|
screenWidth = 320
|
|
screenHeight = 240
|
|
)
|
|
|
|
var (
|
|
gophersImage *ebiten.Image
|
|
)
|
|
|
|
func update(screen *ebiten.Image) error {
|
|
dsts, srcs := []image.Rectangle{}, []image.Rectangle{}
|
|
w, h := gophersImage.Size()
|
|
for i := 0; i < h; i++ {
|
|
width := w + i*3/4
|
|
x := ((h - i) * 3 / 4) / 2
|
|
dsts = append(dsts, image.Rect(x, i, x+width, i+1))
|
|
srcs = append(srcs, image.Rect(0, i, w, i+1))
|
|
}
|
|
maxWidth := float64(w) + float64(h)*0.75
|
|
geo := ebiten.TranslateGeometry(-maxWidth/2, -float64(h)/2)
|
|
geo.Concat(ebiten.TranslateGeometry(screenWidth/2, screenHeight/2))
|
|
screen.DrawImage(gophersImage, &ebiten.DrawImageOptions{
|
|
DstParts: dsts,
|
|
SrcParts: srcs,
|
|
GeometryMatrix: geo,
|
|
})
|
|
return nil
|
|
}
|
|
|
|
func main() {
|
|
var err error
|
|
gophersImage, _, err = ebitenutil.NewImageFromFile("images/gophers.jpg", ebiten.FilterNearest)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Perspective (Ebiten Demo)"); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|