mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2025-01-12 03:58:55 +01:00
Add example alphablending
This commit is contained in:
parent
7727ed13ae
commit
b50e82f49d
78
example/alphablending/main.go
Normal file
78
example/alphablending/main.go
Normal file
@ -0,0 +1,78 @@
|
|||||||
|
/*
|
||||||
|
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/color"
|
||||||
|
_ "image/png"
|
||||||
|
"log"
|
||||||
|
)
|
||||||
|
|
||||||
|
const (
|
||||||
|
screenWidth = 320
|
||||||
|
screenHeight = 240
|
||||||
|
)
|
||||||
|
|
||||||
|
type Game struct {
|
||||||
|
count int
|
||||||
|
tmpRenderTarget *ebiten.RenderTarget
|
||||||
|
ebitenTexture *ebiten.Texture
|
||||||
|
}
|
||||||
|
|
||||||
|
func (g *Game) Update(gr ebiten.GraphicsContext) error {
|
||||||
|
g.count++
|
||||||
|
g.count %= 120
|
||||||
|
diff := float64(g.count) * 0.5
|
||||||
|
if 60 < g.count {
|
||||||
|
diff = float64(120-g.count) * 0.5
|
||||||
|
}
|
||||||
|
|
||||||
|
gr.PushRenderTarget(g.tmpRenderTarget)
|
||||||
|
gr.Clear()
|
||||||
|
for i := 0; i < 10; i++ {
|
||||||
|
geo := ebiten.TranslateGeometry(15+float64(i)*(20+diff), 20)
|
||||||
|
clr := ebiten.ScaleColor(color.RGBA{0xff, 0xff, 0xff, 0x80})
|
||||||
|
ebiten.DrawWholeTexture(gr, g.ebitenTexture, geo, clr)
|
||||||
|
}
|
||||||
|
gr.PopRenderTarget()
|
||||||
|
|
||||||
|
gr.Fill(color.RGBA{0x00, 0x00, 0x80, 0xff})
|
||||||
|
for i := 0; i < 10; i++ {
|
||||||
|
geo := ebiten.TranslateGeometry(0, float64(i)*(10+diff))
|
||||||
|
clr := ebiten.ColorMatrixI()
|
||||||
|
ebiten.DrawWholeTexture(gr, g.tmpRenderTarget.Texture(), geo, clr)
|
||||||
|
}
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func main() {
|
||||||
|
g := new(Game)
|
||||||
|
var err error
|
||||||
|
g.ebitenTexture, _, err = ebitenutil.NewTextureFromFile("images/ebiten.png", ebiten.FilterNearest)
|
||||||
|
if err != nil {
|
||||||
|
log.Fatal(err)
|
||||||
|
}
|
||||||
|
g.tmpRenderTarget, err = ebiten.NewRenderTarget(screenWidth, screenHeight, ebiten.FilterNearest)
|
||||||
|
if err != nil {
|
||||||
|
log.Fatal(err)
|
||||||
|
}
|
||||||
|
if err := ebiten.Run(g.Update, screenWidth, screenHeight, 2, "Perspective (Ebiten Demo)"); err != nil {
|
||||||
|
log.Fatal(err)
|
||||||
|
}
|
||||||
|
}
|
Loading…
Reference in New Issue
Block a user