OXIESEC PANEL

Name	Size	Modified	Perms
📁 ..	-	12/01/2022 06:13:56 PM	rwxr-xr-x
📄 bench_test.go	6.57 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 clip_test.go	4.22 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 draw.go	33.94 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 draw_test.go	25.97 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 example_test.go	1.07 KB	12/01/2022 06:12:58 PM	rw-r--r--

Editing: example_test.go

// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package draw_test

import (
	"fmt"
	"image"
	"image/color"
	"image/draw"
	"math"
)

func ExampleDrawer_floydSteinberg() {
	const width = 130
	const height = 50

im := image.NewGray(image.Rectangle{Max: image.Point{X: width, Y: height}})
	for x := 0; x < width; x++ {
		for y := 0; y < height; y++ {
			dist := math.Sqrt(math.Pow(float64(x-width/2), 2)/3+math.Pow(float64(y-height/2), 2)) / (height / 1.5) * 255
			var gray uint8
			if dist > 255 {
				gray = 255
			} else {
				gray = uint8(dist)
			}
			im.SetGray(x, y, color.Gray{Y: 255 - gray})
		}
	}
	pi := image.NewPaletted(im.Bounds(), []color.Color{
		color.Gray{Y: 255},
		color.Gray{Y: 160},
		color.Gray{Y: 70},
		color.Gray{Y: 35},
		color.Gray{Y: 0},
	})

draw.FloydSteinberg.Draw(pi, im.Bounds(), im, image.ZP)
	shade := []string{" ", "░", "▒", "▓", "█"}
	for i, p := range pi.Pix {
		fmt.Print(shade[p])
		if (i+1)%width == 0 {
			fmt.Print("\n")
		}
	}
}