mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-25 11:18:54 +01:00
132 lines
3.3 KiB
Go
132 lines
3.3 KiB
Go
// Copyright 2018 The Ebiten 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.
|
|
|
|
// +build example
|
|
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"image"
|
|
_ "image/png"
|
|
"log"
|
|
|
|
"github.com/hajimehoshi/ebiten/v2"
|
|
"github.com/hajimehoshi/ebiten/v2/ebitenutil"
|
|
"github.com/hajimehoshi/ebiten/v2/examples/resources/images"
|
|
)
|
|
|
|
const (
|
|
screenWidth = 640
|
|
screenHeight = 480
|
|
)
|
|
|
|
var ebitenImage *ebiten.Image
|
|
|
|
func init() {
|
|
// Decode image from a byte slice instead of a file so that
|
|
// this example works in any working directory.
|
|
// If you want to use a file, there are some options:
|
|
// 1) Use os.Open and pass the file to the image decoder.
|
|
// This is a very regular way, but doesn't work on browsers.
|
|
// 2) Use ebitenutil.OpenFile and pass the file to the image decoder.
|
|
// This works even on browsers.
|
|
// 3) Use ebitenutil.NewImageFromFile to create an ebiten.Image directly from a file.
|
|
// This also works on browsers.
|
|
img, _, err := image.Decode(bytes.NewReader(images.Ebiten_png))
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
ebitenImage = ebiten.NewImageFromImage(img)
|
|
}
|
|
|
|
func drawRect(screen *ebiten.Image, img *ebiten.Image, x, y, width, height float32, address ebiten.Address, msg string) {
|
|
sx, sy := -width/2, -height/2
|
|
vs := []ebiten.Vertex{
|
|
{
|
|
DstX: x,
|
|
DstY: y,
|
|
SrcX: sx,
|
|
SrcY: sy,
|
|
ColorR: 1,
|
|
ColorG: 1,
|
|
ColorB: 1,
|
|
ColorA: 1,
|
|
},
|
|
{
|
|
DstX: x + width,
|
|
DstY: y,
|
|
SrcX: sx + width,
|
|
SrcY: sy,
|
|
ColorR: 1,
|
|
ColorG: 1,
|
|
ColorB: 1,
|
|
ColorA: 1,
|
|
},
|
|
{
|
|
DstX: x,
|
|
DstY: y + height,
|
|
SrcX: sx,
|
|
SrcY: sy + height,
|
|
ColorR: 1,
|
|
ColorG: 1,
|
|
ColorB: 1,
|
|
ColorA: 1,
|
|
},
|
|
{
|
|
DstX: x + width,
|
|
DstY: y + height,
|
|
SrcX: sx + width,
|
|
SrcY: sy + height,
|
|
ColorR: 1,
|
|
ColorG: 1,
|
|
ColorB: 1,
|
|
ColorA: 1,
|
|
},
|
|
}
|
|
op := &ebiten.DrawTrianglesOptions{}
|
|
op.Address = address
|
|
screen.DrawTriangles(vs, []uint16{0, 1, 2, 1, 2, 3}, img, op)
|
|
|
|
ebitenutil.DebugPrintAt(screen, msg, int(x), int(y)-16)
|
|
}
|
|
|
|
type Game struct{}
|
|
|
|
func (g *Game) Update() error {
|
|
return nil
|
|
}
|
|
|
|
func (g *Game) Draw(screen *ebiten.Image) {
|
|
const ox, oy = 40, 60
|
|
drawRect(screen, ebitenImage, ox, oy, 200, 100, ebiten.AddressClampToZero, "Regular")
|
|
drawRect(screen, ebitenImage, 220+ox, oy, 200, 100, ebiten.AddressRepeat, "Regular, Repeat")
|
|
|
|
subImage := ebitenImage.SubImage(image.Rect(10, 5, 20, 30)).(*ebiten.Image)
|
|
drawRect(screen, subImage, ox, 200+oy, 200, 100, ebiten.AddressClampToZero, "Subimage")
|
|
drawRect(screen, subImage, 220+ox, 200+oy, 200, 100, ebiten.AddressRepeat, "Subimage, Repeat")
|
|
}
|
|
|
|
func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
|
|
return screenWidth, screenHeight
|
|
}
|
|
|
|
func main() {
|
|
ebiten.SetWindowSize(screenWidth, screenHeight)
|
|
ebiten.SetWindowTitle("Sampler Address (Ebiten Demo)")
|
|
if err := ebiten.RunGame(&Game{}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|