examples/flappy: use text/v2

Updates #2454

examples/flappy/main.go

@@ -27,9 +27,6 @@ import (
 	"math/rand"
 	"time"
 
-	"golang.org/x/image/font"
-	"golang.org/x/image/font/opentype"
-
 	"github.com/hajimehoshi/ebiten/v2"
 	"github.com/hajimehoshi/ebiten/v2/audio"
 	"github.com/hajimehoshi/ebiten/v2/audio/vorbis"
@@ -39,7 +36,7 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/examples/resources/fonts"
 	resources "github.com/hajimehoshi/ebiten/v2/examples/resources/images/flappy"
 	"github.com/hajimehoshi/ebiten/v2/inpututil"
-	"github.com/hajimehoshi/ebiten/v2/text"
+	"github.com/hajimehoshi/ebiten/v2/text/v2"
 )
 
 var flagCRT = flag.Bool("crt", false, "enable the CRT effect")
@@ -79,9 +76,7 @@ const (
 var (
 	gopherImage      *ebiten.Image
 	tilesImage       *ebiten.Image
-	titleArcadeFont font.Face
+	arcadeFaceSource *text.GoTextFaceSource
-	arcadeFont      font.Face
-	smallArcadeFont font.Face
 )
 
 func init() {
@@ -99,35 +94,11 @@ func init() {
 }
 
 func init() {
-	tt, err := opentype.Parse(fonts.PressStart2P_ttf)
+	s, err := text.NewGoTextFaceSource(bytes.NewReader(fonts.PressStart2P_ttf))
-	if err != nil {
-		log.Fatal(err)
-	}
-	const dpi = 72
-	titleArcadeFont, err = opentype.NewFace(tt, &opentype.FaceOptions{
-		Size:    titleFontSize,
-		DPI:     dpi,
-		Hinting: font.HintingFull,
-	})
-	if err != nil {
-		log.Fatal(err)
-	}
-	arcadeFont, err = opentype.NewFace(tt, &opentype.FaceOptions{
-		Size:    fontSize,
-		DPI:     dpi,
-		Hinting: font.HintingFull,
-	})
-	if err != nil {
-		log.Fatal(err)
-	}
-	smallArcadeFont, err = opentype.NewFace(tt, &opentype.FaceOptions{
-		Size:    smallFontSize,
-		DPI:     dpi,
-		Hinting: font.HintingFull,
-	})
 	if err != nil {
 		log.Fatal(err)
 	}
+	arcadeFaceSource = s
 }
 
 type Mode int
@@ -292,37 +263,62 @@ func (g *Game) Draw(screen *ebiten.Image) {
 	if g.mode != ModeTitle {
 		g.drawGopher(screen)
 	}
-	var titleTexts []string
+
-	var texts []string
+	var titleTexts string
+	var texts string
 	switch g.mode {
 	case ModeTitle:
-		titleTexts = []string{"FLAPPY GOPHER"}
+		titleTexts = "FLAPPY GOPHER"
-		texts = []string{"", "", "", "", "", "", "", "PRESS SPACE KEY", "", "OR A/B BUTTON", "", "OR TOUCH SCREEN"}
+		texts = "\n\n\n\n\n\n\nPRESS SPACE KEY\n\nOR A/B BUTTON\n\nOR TOUCH SCREEN"
 	case ModeGameOver:
-		texts = []string{"", "GAME OVER!"}
+		texts = "\nGAME OVER!"
-	}
-	for i, l := range titleTexts {
-		x := (screenWidth - len(l)*titleFontSize) / 2
-		text.Draw(screen, l, titleArcadeFont, x, (i+4)*titleFontSize, color.White)
-	}
-	for i, l := range texts {
-		x := (screenWidth - len(l)*fontSize) / 2
-		text.Draw(screen, l, arcadeFont, x, (i+4)*fontSize, color.White)
 	}
 
+	op := &text.DrawOptions{}
+	op.GeoM.Translate(screenWidth/2, 3*titleFontSize)
+	op.ColorScale.ScaleWithColor(color.White)
+	op.LineHeight = titleFontSize
+	op.PrimaryAlign = text.AlignCenter
+	text.Draw(screen, titleTexts, &text.GoTextFace{
+		Source: arcadeFaceSource,
+		Size:   titleFontSize,
+	}, op)
+
+	op = &text.DrawOptions{}
+	op.GeoM.Translate(screenWidth/2, 3*titleFontSize)
+	op.ColorScale.ScaleWithColor(color.White)
+	op.LineHeight = fontSize
+	op.PrimaryAlign = text.AlignCenter
+	text.Draw(screen, texts, &text.GoTextFace{
+		Source: arcadeFaceSource,
+		Size:   fontSize,
+	}, op)
+
 	if g.mode == ModeTitle {
-		msg := []string{
+		const msg = "Go Gopher by Renee French is\nlicenced under CC BY 3.0."
-			"Go Gopher by Renee French is",
+
-			"licenced under CC BY 3.0.",
+		op := &text.DrawOptions{}
-		}
+		op.GeoM.Translate(screenWidth/2, screenHeight)
-		for i, l := range msg {
+		op.ColorScale.ScaleWithColor(color.White)
-			x := (screenWidth - len(l)*smallFontSize) / 2
+		op.LineHeight = smallFontSize
-			text.Draw(screen, l, smallArcadeFont, x, screenHeight-4+(i-1)*smallFontSize, color.White)
+		op.PrimaryAlign = text.AlignCenter
-		}
+		op.SecondaryAlign = text.AlignEnd
+		text.Draw(screen, msg, &text.GoTextFace{
+			Source: arcadeFaceSource,
+			Size:   smallFontSize,
+		}, op)
 	}
 
-	scoreStr := fmt.Sprintf("%04d", g.score())
+	op = &text.DrawOptions{}
-	text.Draw(screen, scoreStr, arcadeFont, screenWidth-len(scoreStr)*fontSize, fontSize, color.White)
+	op.GeoM.Translate(screenWidth, 0)
+	op.ColorScale.ScaleWithColor(color.White)
+	op.LineHeight = fontSize
+	op.PrimaryAlign = text.AlignEnd
+	text.Draw(screen, fmt.Sprintf("%04d", g.score()), &text.GoTextFace{
+		Source: arcadeFaceSource,
+		Size:   fontSize,
+	}, op)
+
 	ebitenutil.DebugPrint(screen, fmt.Sprintf("TPS: %0.2f", ebiten.ActualTPS()))
 }