mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-21 05:42:18 +02:00
113 lines
2.3 KiB
Go
113 lines
2.3 KiB
Go
package monochrome
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import (
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"github.com/hajimehoshi/go.ebiten"
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"github.com/hajimehoshi/go.ebiten/graphics"
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"github.com/hajimehoshi/go.ebiten/graphics/matrix"
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"image"
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"image/color"
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_ "image/png"
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"os"
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)
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type Monochrome struct {
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ebitenTexture graphics.Texture
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ch chan bool
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colorMatrix matrix.Color
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}
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func New() *Monochrome {
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return &Monochrome{
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ch: make(chan bool),
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colorMatrix: matrix.IdentityColor(),
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}
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}
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func (game *Monochrome) ScreenWidth() int {
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return 256
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}
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func (game *Monochrome) ScreenHeight() int {
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return 240
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}
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func (game *Monochrome) Fps() int {
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return 60
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}
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func (game *Monochrome) Init(tf graphics.TextureFactory) {
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file, err := os.Open("ebiten.png")
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if err != nil {
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panic(err)
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}
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defer file.Close()
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img, _, err := image.Decode(file)
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if err != nil {
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panic(err)
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}
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if game.ebitenTexture, err = tf.NewTextureFromImage(img); err != nil {
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panic(err)
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}
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go game.update()
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}
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func mean(a, b matrix.Color, k float64) matrix.Color {
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dim := a.Dim()
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result := matrix.Color{}
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for i := 0; i < dim-1; i++ {
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for j := 0; j < dim; j++ {
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result.Elements[i][j] =
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a.Elements[i][j]*(1-k) +
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b.Elements[i][j]*k
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}
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}
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return result
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}
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func (game *Monochrome) update() {
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colorI := matrix.IdentityColor()
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colorMonochrome := matrix.Monochrome()
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for {
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for i := 0; i < game.Fps(); i++ {
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<-game.ch
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rate := float64(i) / float64(game.Fps())
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game.colorMatrix = mean(colorI, colorMonochrome, rate)
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game.ch <- true
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}
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for i := 0; i < game.Fps(); i++ {
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<-game.ch
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game.colorMatrix = colorMonochrome
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game.ch <- true
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}
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for i := 0; i < game.Fps(); i++ {
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<-game.ch
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rate := float64(i) / float64(game.Fps())
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game.colorMatrix = mean(colorMonochrome, colorI, rate)
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game.ch <- true
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}
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for i := 0; i < game.Fps(); i++ {
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<-game.ch
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game.colorMatrix = colorI
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game.ch <- true
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}
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}
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}
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func (game *Monochrome) Update(input ebiten.InputState) {
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game.ch <- true
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<-game.ch
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}
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func (game *Monochrome) Draw(g graphics.GraphicsContext, offscreen graphics.Texture) {
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g.Fill(&color.RGBA{R: 128, G: 128, B: 255, A: 255})
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geometryMatrix := matrix.IdentityGeometry()
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tx := game.ScreenWidth()/2 - game.ebitenTexture.Width/2
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ty := game.ScreenHeight()/2 - game.ebitenTexture.Height/2
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geometryMatrix.Translate(float64(tx), float64(ty))
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g.DrawTexture(game.ebitenTexture.ID,
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geometryMatrix, game.colorMatrix)
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}
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