ebiten/example/mosaic/main.go

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// 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.
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package main
import (
"github.com/hajimehoshi/ebiten"
"github.com/hajimehoshi/ebiten/ebitenutil"
_ "image/jpeg"
"log"
)
const (
screenWidth = 320
screenHeight = 240
)
const mosaicRatio = 16
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var (
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gophersImage *ebiten.Image
gophersRenderTarget *ebiten.Image
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)
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func update(screen *ebiten.Image) error {
gophersRenderTarget.DrawImage(gophersImage, &ebiten.DrawImageOptions{
GeometryMatrix: ebiten.ScaleGeometry(1.0/mosaicRatio, 1.0/mosaicRatio),
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})
screen.DrawImage(gophersRenderTarget, &ebiten.DrawImageOptions{
GeometryMatrix: ebiten.ScaleGeometry(mosaicRatio, mosaicRatio),
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})
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return nil
}
func main() {
var err error
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gophersImage, _, err = ebitenutil.NewImageFromFile("images/gophers.jpg", ebiten.FilterNearest)
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if err != nil {
log.Fatal(err)
}
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w, h := gophersImage.Size()
gophersRenderTarget, err = ebiten.NewImage(w/mosaicRatio, h/mosaicRatio, ebiten.FilterNearest)
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if err != nil {
log.Fatal(err)
}
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if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Mosaic (Ebiten Demo)"); err != nil {
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log.Fatal(err)
}
}