downgrade ebiten/v2 v2.5.9

internal/ui/draw.go

@@ -5,8 +5,8 @@ import (
 	"math"
 
 	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
 	"github.com/hajimehoshi/ebiten/v2/text"
-	"github.com/hajimehoshi/ebiten/v2/vector"
 	"golang.org/x/image/font/basicfont"
 )
 
@@ -17,19 +17,68 @@ var whitePixel = func() *ebiten.Image {
 }()
 
 func Rect(screen *ebiten.Image, x, y, w, h float32, clr color.Color) {
-	vector.FillRect(screen, x, y, w, h, clr, true)
+	ebitenutil.DrawRect(screen, float64(x), float64(y), float64(w), float64(h), clr)
 }
 
 func RectOutline(screen *ebiten.Image, x, y, w, h, stroke float32, clr color.Color) {
-	vector.StrokeRect(screen, x, y, w, h, stroke, clr, true)
+	if w <= 0 || h <= 0 || stroke <= 0 {
+		return
+	}
+	if stroke > w {
+		stroke = w
+	}
+	if stroke > h {
+		stroke = h
+	}
+	Rect(screen, x, y, w, stroke, clr)
+	Rect(screen, x, y+h-stroke, w, stroke, clr)
+	Rect(screen, x, y, stroke, h, clr)
+	Rect(screen, x+w-stroke, y, stroke, h, clr)
 }
 
 func Line(screen *ebiten.Image, x1, y1, x2, y2, width float32, clr color.Color) {
-	vector.StrokeLine(screen, x1, y1, x2, y2, width, clr, true)
+	dx := x2 - x1
+	dy := y2 - y1
+	length := float32(math.Hypot(float64(dx), float64(dy)))
+	if length <= 0 || width <= 0 {
+		return
+	}
+
+	r, g, b, a := clr.RGBA()
+	op := &ebiten.DrawImageOptions{}
+	op.GeoM.Scale(float64(length), float64(width))
+	op.GeoM.Translate(0, -float64(width)/2)
+	op.GeoM.Rotate(math.Atan2(float64(dy), float64(dx)))
+	op.GeoM.Translate(float64(x1), float64(y1))
+	op.ColorM.Scale(
+		float64(r)/0xffff,
+		float64(g)/0xffff,
+		float64(b)/0xffff,
+		float64(a)/0xffff,
+	)
+	screen.DrawImage(whitePixel, op)
 }
 
 func Circle(screen *ebiten.Image, x, y, r float32, clr color.Color) {
-	vector.FillCircle(screen, x, y, r, clr, true)
+	if r <= 0 {
+		return
+	}
+	ri := int(math.Ceil(float64(r)))
+	for dy := -ri; dy <= ri; dy++ {
+		fy := float64(dy)
+		if math.Abs(fy) > float64(r) {
+			continue
+		}
+		halfWidth := math.Sqrt(float64(r)*float64(r) - fy*fy)
+		ebitenutil.DrawRect(
+			screen,
+			float64(x)-halfWidth,
+			float64(y)+fy,
+			halfWidth*2,
+			1,
+			clr,
+		)
+	}
 }
 
 func Triangle(screen *ebiten.Image, x1, y1, x2, y2, x3, y3 float32, clr color.Color) {