package application

import (
	"image"
	"math"

	"github.com/hajimehoshi/ebiten/v2"
)

type canvas struct {
	w, h int

	img *ebiten.Image

	scale float64
}

func NewCanvas(w, h int) *canvas {
	return &canvas{
		w:     w,
		h:     h,
		img:   ebiten.NewImage(w, h),
		scale: 1,
	}
}

func (c *canvas) pixelScreenRect(x, y int) image.Rectangle {
	return image.Rect(int(math.Floor(float64(x)*c.scale)), int(math.Floor(float64(y)*c.scale)), int(math.Ceil(float64(x+1)*c.scale)), int(math.Ceil(float64(y+1)*c.scale)))
}