imageutils/scale_test.go

package imageutils

import (
	"image"
	"image/color"
	"image/draw"
	"image/png"
	"io"
	"testing"

	"github.com/potassium5703/texture"
)

func Render(img image.Image, rect image.Rectangle) image.Image {
	newimg := image.NewRGBA(rect)
	draw.Draw(newimg, rect, image.White, image.ZP, draw.Src)
	draw.Draw(newimg, rect, img, image.ZP, draw.Over)
	return newimg
}

func BenchmarkScale(b *testing.B) {
	for i := 0; i < b.N; i++ {
		err := png.Encode(io.Discard,
			Scale(Render(
				texture.New(color.White, color.Black, 2),
				image.Rect(0, 0, 64, 64),
			), 64),
		)
		if err != nil {
			panic(err)
		}
	}
}