程式語言 - Golang - SDL 2.0 - Color Key

參考資訊：
https://github.com/veandco/go-sdl2
https://github.com/veandco/go-sdl2-examples
https://pkg.go.dev/github.com/veandco/go-sdl2#section-readme

初始化

$ go version
    go version go1.24.4 linux/amd64

$ go mod init main

main.go

package main
  
import "github.com/veandco/go-sdl2/sdl"
import "github.com/veandco/go-sdl2/img"
  
func main() {
    sdl.Init(sdl.INIT_EVERYTHING);
    defer sdl.Quit()
  
    window, _ := sdl.CreateWindow("main", 0, 0, 320, 240, sdl.WINDOW_SHOWN)
    defer window.Destroy()
  
    renderer, _ := sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
    defer renderer.Destroy()
  
    png, _ := img.Load("main.png")
    defer png.Free()

    tmp, _ := sdl.CreateRGBSurface(0, 320, 240, 32, 0, 0, 0, 0)
    tmp.FillRect(nil, sdl.MapRGBA(tmp.Format, 255, 0, 0, 255))
    png.SetColorKey(true, 0xffffff)
    png.Blit(nil, tmp, nil)
    defer tmp.Free()
    
    t, _ := renderer.CreateTextureFromSurface(tmp)
    defer t.Destroy()
  
    renderer.Clear()
    renderer.Copy(t, nil, nil)
    renderer.Present()
  
    sdl.Delay(3000)
}

執行

$ go mod tidy
$ go run -v main.go