ebitenutil: Remove RecordScreenAsGIF

Updates #1127

ebitenutil/gif.go

@@ -1,140 +0,0 @@
-// Copyright 2014 Hajime Hoshi
-//
-// 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 ebitenutil
-
-import (
-	"image"
-	"image/color"
-	"image/color/palette"
-	"image/draw"
-	"image/gif"
-	"io"
-	"sync"
-
-	"github.com/hajimehoshi/ebiten/v2"
-)
-
-type recorder struct {
-	inner        func(screen *ebiten.Image) error
-	writer       io.Writer
-	frameNum     int
-	skips        int
-	gif          *gif.GIF
-	currentFrame int
-	wg           sync.WaitGroup
-}
-
-var cheapPalette color.Palette
-
-func init() {
-	cs := []color.Color{}
-	for _, r := range []uint8{0x00, 0x80, 0xff} {
-		for _, g := range []uint8{0x00, 0x80, 0xff} {
-			for _, b := range []uint8{0x00, 0x80, 0xff} {
-				cs = append(cs, color.RGBA{r, g, b, 0xff})
-			}
-		}
-	}
-	cheapPalette = color.Palette(cs)
-}
-
-func (r *recorder) delay() int {
-	delay := 100 * r.skips / ebiten.MaxTPS()
-	if delay < 2 {
-		return 2
-	}
-	return delay
-}
-
-func (r *recorder) palette() color.Palette {
-	if 1 < (r.frameNum-1)/r.skips+1 {
-		return cheapPalette
-	}
-	return palette.Plan9
-}
-
-func (r *recorder) update(screen *ebiten.Image) error {
-	if err := r.inner(screen); err != nil {
-		return err
-	}
-	if r.currentFrame == r.frameNum {
-		return nil
-	}
-	if r.currentFrame%r.skips == 0 {
-		if r.gif == nil {
-			num := (r.frameNum-1)/r.skips + 1
-			r.gif = &gif.GIF{
-				Image:     make([]*image.Paletted, num),
-				Delay:     make([]int, num),
-				LoopCount: -1,
-			}
-		}
-		s := image.NewNRGBA(screen.Bounds())
-		draw.Draw(s, s.Bounds(), screen, screen.Bounds().Min, draw.Src)
-
-		img := image.NewPaletted(s.Bounds(), r.palette())
-		f := r.currentFrame / r.skips
-		r.wg.Add(1)
-		go func() {
-			defer r.wg.Done()
-			draw.FloydSteinberg.Draw(img, img.Bounds(), s, s.Bounds().Min)
-			r.gif.Image[f] = img
-			r.gif.Delay[f] = r.delay()
-		}()
-	}
-
-	r.currentFrame++
-	if r.currentFrame == r.frameNum {
-		r.wg.Wait()
-		if err := gif.EncodeAll(r.writer, r.gif); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// RecordScreenAsGIF returns updating function with recording the screen as an animation GIF image.
-//
-// Deprecated: (as of 1.6.0) Do not use this.
-//
-// This encodes each screen at each frame and may slows the application.
-//
-// Here is the example to record initial 120 frames of your game:
-//
-//     func update(screen *ebiten.Image) error {
-//         // ...
-//     }
-//
-//     func main() {
-//         out, err := os.Create("output.gif")
-//         if err != nil {
-//             log.Fatal(err)
-//         }
-//         defer out.Close()
-//
-//         update := RecordScreenAsGIF(update, out, 120)
-//         if err := ebiten.Run(update, 320, 240, 2, "Your game's title"); err != nil {
-//             log.Fatal(err)
-//         }
-//     }
-func RecordScreenAsGIF(update func(*ebiten.Image) error, out io.Writer, frameNum int) func(*ebiten.Image) error {
-	r := &recorder{
-		inner:    update,
-		writer:   out,
-		frameNum: frameNum,
-		skips:    10,
-	}
-	return r.update
-}