Created
July 3, 2020 20:36
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gui renderer
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| // +build ignore | |
| package main | |
| import ( | |
| "context" | |
| "encoding/json" | |
| "image" | |
| "log" | |
| "os" | |
| "golang.org/x/image/draw" | |
| "gioui.org/app" | |
| "gioui.org/f32" | |
| "gioui.org/io/key" | |
| "gioui.org/io/system" | |
| "gioui.org/op" | |
| "gioui.org/op/paint" | |
| "github.com/zephyrtronium/xirho" | |
| "github.com/zephyrtronium/xirho/encoding" | |
| ) | |
| func run(r *xirho.R, aspect float64) { | |
| log.Printf("rendering %+v\n", r) | |
| w := app.NewWindow(app.Title("zeta xi")) | |
| var ops op.Ops | |
| var img *image.RGBA | |
| size := image.Point{X: -1, Y: -1} | |
| ctx, cancel := context.WithCancel(context.Background()) | |
| stop := make(chan bool, 1) | |
| stop <- true | |
| for ev := range w.Events() { | |
| switch ev := ev.(type) { | |
| case system.FrameEvent: | |
| log.Printf("update: %+v, current bounds are %+v\n", ev, r.Hist.Bounds().Size()) | |
| cancel() | |
| ctx, cancel = context.WithCancel(context.Background()) | |
| <-stop | |
| if ev.Size != size { | |
| var w, h int | |
| if aspect <= 1 { | |
| h = ev.Size.Y | |
| w = int(float64(h) * aspect) | |
| } else { | |
| w = ev.Size.X | |
| h = int(float64(w) / aspect) | |
| } | |
| b := r.Hist.Bounds().Size() | |
| log.Printf("resize: old %dx%d, new %dx%d\n", b.X/2, b.Y/2, w, h) | |
| r.Hist.Reset(w*2, h*2) | |
| img = image.NewRGBA(image.Rect(0, 0, w, h)) | |
| size = ev.Size | |
| } | |
| log.Println("plotting after", r.Iters(), "iters") | |
| draw.Draw(img, img.Bounds(), image.NewUniform(image.Black), image.Point{}, draw.Src) | |
| draw.ApproxBiLinear.Scale(img, img.Bounds(), r.Hist, r.Hist.Bounds(), draw.Over, nil) | |
| go render(ctx, r, stop) | |
| paint.NewImageOp(img).Add(&ops) | |
| sz := img.Bounds().Size() | |
| paint.PaintOp{Rect: f32.Rect(0, 0, float32(sz.X), float32(sz.Y))}.Add(&ops) | |
| ev.Frame(&ops) | |
| case key.Event: | |
| log.Println("keypress:", ev) | |
| if ev.Name == key.NameEscape { | |
| w.Close() | |
| } | |
| w.Invalidate() | |
| case system.DestroyEvent: | |
| cancel() | |
| <-stop | |
| } | |
| } | |
| cancel() | |
| log.Fatalln("quit") | |
| } | |
| func render(ctx context.Context, r *xirho.R, stop chan bool) { | |
| log.Println("begin render") | |
| r.Render(ctx) | |
| log.Println("stop render") | |
| stop <- true | |
| } | |
| func main() { | |
| f, err := os.Open("./img/discjulian.json") | |
| if err != nil { | |
| log.Fatalln(err) | |
| } | |
| r, aspect, err := encoding.Unmarshal(json.NewDecoder(f)) | |
| if err != nil { | |
| log.Fatalln(err) | |
| } | |
| go run(r, aspect) | |
| app.Main() | |
| } |
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