M .gitignore → .gitignore

@@ -1,3 +1,4 @@ 
 .idea
 sketch
 build
+hotdog.png

M go.mod → go.mod

@@ -1,3 +1,10 @@ 
 module sketch
 
 go 1.21.3
+
+require (
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
+	golang.org/x/term v0.14.0
+)
+
+require golang.org/x/sys v0.14.0 // indirect

A go.sum

@@ -0,0 +1,6 @@ 
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
+golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
+golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.14.0 h1:LGK9IlZ8T9jvdy6cTdfKUCltatMFOehAQo9SRC46UQ8=
+golang.org/x/term v0.14.0/go.mod h1:TySc+nGkYR6qt8km8wUhuFRTVSMIX3XPR58y2lC8vww=

M main.go → main.go

@@ -1,3 +1,92 @@ 
 package main
 
-func main() {}+import (
+	"fmt"
+	"github.com/nfnt/resize"
+	"golang.org/x/term"
+	"image"
+	_ "image/jpeg"
+	_ "image/png"
+	"os"
+)
+
+var w, h int
+
+func getTermSize() {
+	W, H, err := term.GetSize(int(os.Stdout.Fd()))
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "fatal: could not get terminal size")
+		os.Exit(1)
+	}
+	w, h = W, H
+}
+
+func getSize(x, y int) (uint, uint) {
+	if y > h {
+		x = x * h / y
+		y = h
+	}
+	if x > w {
+		y = y * w / x
+		x = w
+	}
+	return uint(x), uint(y) / 2
+}
+
+func getImg(path string) (image.Image, error) {
+	var img image.Image
+	file, err := os.Open(path)
+	if err != nil {
+		return img, fmt.Errorf("error opening file: %s", path)
+	}
+	defer file.Close()
+	img, _, err = image.Decode(file)
+	if err != nil {
+		return img, fmt.Errorf("error decoding file: %s", path)
+	}
+	return img, nil
+}
+
+func printImg(path string) error {
+
+	img, err := getImg(path)
+	if err != nil {
+		return err
+	}
+
+	W, H := getSize(img.Bounds().Dx(), img.Bounds().Dy())
+
+	img = resize.Resize(W, H, img, resize.MitchellNetravali)
+
+	bounds := img.Bounds()
+	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
+		for x := bounds.Min.X; x < bounds.Max.X; x++ {
+			r, g, b, _ := img.At(x, y).RGBA()
+			fmt.Printf("\033[48;2;%d;%d;%dm \033[0m", r>>8, g>>8, b>>8)
+		}
+		fmt.Println()
+	}
+	fmt.Println()
+	return nil
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Fprintln(os.Stderr, "fatal: no image specified")
+		os.Exit(1)
+	}
+	getTermSize()
+	var errs []error
+	for _, path := range os.Args[1:] {
+		err := printImg(path)
+		if err != nil {
+			errs = append(errs, err)
+		}
+	}
+	if len(errs) > 0 {
+		for _, err := range errs {
+			fmt.Fprintln(os.Stderr, err)
+		}
+		os.Exit(1)
+	}
+}