mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-26 03:38:55 +01:00
79 lines
1.9 KiB
Go
79 lines
1.9 KiB
Go
// Copyright 2022 The Ebitengine 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.
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"image"
|
|
"image/color"
|
|
"log"
|
|
|
|
"github.com/hajimehoshi/ebiten/v2"
|
|
"github.com/hajimehoshi/ebiten/v2/ebitenutil"
|
|
)
|
|
|
|
const (
|
|
cx = 32
|
|
cy = 32
|
|
)
|
|
|
|
type Game struct {
|
|
offscreen *ebiten.Image
|
|
subImages [cx][cy]*ebiten.Image
|
|
}
|
|
|
|
func (g *Game) Update() error {
|
|
return nil
|
|
}
|
|
|
|
func (g *Game) Draw(screen *ebiten.Image) {
|
|
if g.offscreen == nil {
|
|
g.offscreen = ebiten.NewImage(screen.Size())
|
|
}
|
|
|
|
// Use various sub-images as rendering destination.
|
|
// This is a proof-of-concept of efficient rendering with sub-images (#2232).
|
|
sw, sh := screen.Size()
|
|
cw := sw / cx
|
|
ch := sh / cy
|
|
for j := 0; j < cy; j++ {
|
|
for i := 0; i < cx; i++ {
|
|
img := g.subImages[i][j]
|
|
if img == nil {
|
|
r := image.Rect(cw*i, ch*j, cw*(i+1), ch*(j+1))
|
|
img = g.offscreen.SubImage(r).(*ebiten.Image)
|
|
g.subImages[i][j] = img
|
|
}
|
|
|
|
clr := color.RGBA{byte(0xff * float64(i) / cx), byte(0xff * float64(j) / cx), 0, 0xff}
|
|
img.Fill(clr)
|
|
}
|
|
}
|
|
|
|
screen.DrawImage(g.offscreen, nil)
|
|
ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %0.2f, TPS: %0.2f", ebiten.ActualFPS(), ebiten.ActualTPS()))
|
|
}
|
|
|
|
func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
|
|
return 640, 480
|
|
}
|
|
|
|
func main() {
|
|
ebiten.SetWindowTitle("Sub-images as rendering destinations (Ebitengine Demo)")
|
|
if err := ebiten.RunGame(&Game{}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|