Add example mosaic

This commit is contained in:
Hajime Hoshi 2014-12-18 23:19:01 +09:00
parent 49bcf8bb32
commit dc0e67f600

64
example/mosaic/main.go Normal file
View File

@ -0,0 +1,64 @@
/*
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/jpeg"
"log"
)
const (
screenWidth = 320
screenHeight = 240
)
const mosaicRatio = 16
type Game struct {
gophersTexture *ebiten.Texture
gophersRenderTarget *ebiten.RenderTarget
}
func (g *Game) Update(gr ebiten.GraphicsContext) error {
gr.PushRenderTarget(g.gophersRenderTarget)
geo := ebiten.ScaleGeometry(1.0/mosaicRatio, 1.0/mosaicRatio)
ebiten.DrawWholeTexture(gr, g.gophersTexture, geo, ebiten.ColorMatrixI())
gr.PopRenderTarget()
geo = ebiten.ScaleGeometry(mosaicRatio/2.0, mosaicRatio/2.0)
ebiten.DrawWholeTexture(gr, g.gophersRenderTarget.Texture(), geo, ebiten.ColorMatrixI())
return nil
}
func main() {
g := new(Game)
var err error
g.gophersTexture, _, err = ebitenutil.NewTextureFromFile("images/gophers.jpg", ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
w, h := g.gophersTexture.Size()
g.gophersRenderTarget, err = ebiten.NewRenderTarget(w/mosaicRatio, h/mosaicRatio, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
if err := ebiten.Run(g.Update, screenWidth, screenHeight, 2, "Mosaic (Ebiten Demo)"); err != nil {
log.Fatal(err)
}
}