prime8dev

commit ca1c87a822f3f7b138b8b7dd8df4200e478de77f
parent 8f5eaf7d60618af21903edca4a4a78383b94895c
Author: Damian Myrda <damian@prime8.dev>
Date:   Thu, 22 Oct 2026 22:16:00 +0000

web: half-block truecolor portrait in the terminal

Diffstat:
M
go.mod
 | 
4
++--
M
internal/utils/logo.go
 | 
66
+++++++++++++++++++++++++++++++++++++++++++++++++++++-------------

2 files changed, 55 insertions(+), 15 deletions(-)
diff --git a/go.mod b/go.mod
@@ -17,6 +17,8 @@ require (
 	github.com/charmbracelet/ssh v0.0.0-20250128164007-98fd5ae11894
 	github.com/charmbracelet/wish v1.4.7
 	github.com/charmbracelet/x/ansi v0.10.1
+	github.com/disintegration/imaging v1.6.2
+	github.com/eliukblau/pixterm/pkg/ansimage v0.0.0-20191210081756-9fb6cf8c2f75
 	github.com/evanw/esbuild v0.27.4
 	github.com/joho/godotenv v1.5.1
 	github.com/muesli/termenv v0.16.0
@@ -41,9 +43,7 @@ require (
 	github.com/charmbracelet/x/windows v0.2.0 // indirect
 	github.com/creack/pty v1.1.21 // indirect
 	github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964 // indirect
-	github.com/disintegration/imaging v1.6.2 // indirect
 	github.com/dlclark/regexp2 v1.11.0 // indirect
-	github.com/eliukblau/pixterm/pkg/ansimage v0.0.0-20191210081756-9fb6cf8c2f75 // indirect
 	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
 	github.com/fatih/color v1.9.0 // indirect
 	github.com/fogleman/gg v1.3.0 // indirect
diff --git a/internal/utils/logo.go b/internal/utils/logo.go
@@ -1,35 +1,75 @@
 package utils
 
 import (
+	"fmt"
+	"image"
 	"path/filepath"
 	"strings"
 	"sync"
 
 	aic "github.com/TheZoraiz/ascii-image-converter/aic_package"
+	"github.com/disintegration/imaging"
 )
 
 var logoMu sync.Mutex
 
-// LogoASCII renders static/me.jpg as ascii art. aic refuses color when the
-// server's env lacks COLORTERM, so it falls back to plain ascii.
-func LogoASCII(width int, colored bool) string {
-	flags := aic.DefaultFlags()
-	flags.Width = width
-	flags.Colored = colored
-	flags.Dither = true
-	flags.Threshold = 160
+const logoPath = "static/me.jpg"
 
+// logoCrop frames the face: fractions of the source image (x0, y0, x1, y1).
+var logoCrop = [4]float64{0.12, 0.08, 0.88, 0.84}
+
+// LogoASCII renders static/me.jpg for terminals. Colored output uses
+// half-block cells (upper half = foreground, lower half = background), so each
+// cell carries two truecolor pixels and the portrait reads as a photo. Plain
+// output falls back to ascii art.
+func LogoASCII(width int, colored bool) string {
 	logoMu.Lock()
 	defer logoMu.Unlock()
 
-	path := filepath.Join("static", "me.jpg")
-	ascii, err := aic.Convert(path, flags)
-	if err != nil && colored {
-		flags.Colored = false
-		ascii, err = aic.Convert(path, flags)
+	if colored {
+		if s, err := halfBlocks(logoPath, width); err == nil {
+			return s
+		}
 	}
+	flags := aic.DefaultFlags()
+	flags.Width = width
+	flags.Dither = true
+	flags.Threshold = 160
+	ascii, err := aic.Convert(filepath.FromSlash(logoPath), flags)
 	if err != nil {
 		return ""
 	}
 	return strings.TrimRight(ascii, "\n")
 }
+
+func halfBlocks(path string, width int) (string, error) {
+	src, err := imaging.Open(path, imaging.AutoOrientation(true))
+	if err != nil {
+		return "", err
+	}
+	b := src.Bounds()
+	w, h := float64(b.Dx()), float64(b.Dy())
+	rect := image.Rect(
+		b.Min.X+int(logoCrop[0]*w), b.Min.Y+int(logoCrop[1]*h),
+		b.Min.X+int(logoCrop[2]*w), b.Min.Y+int(logoCrop[3]*h),
+	)
+	crop := imaging.Crop(src, rect)
+	// one cell is roughly twice as tall as wide, so two pixel rows per cell
+	// keep the pixels square
+	rows := int(float64(width)*float64(rect.Dy())/float64(rect.Dx())+0.5) &^ 1
+	img := imaging.Resize(crop, width, rows, imaging.Lanczos)
+
+	var sb strings.Builder
+	for y := 0; y < rows; y += 2 {
+		if y > 0 {
+			sb.WriteByte('\n')
+		}
+		for x := 0; x < width; x++ {
+			t := img.NRGBAAt(x, y)
+			u := img.NRGBAAt(x, y+1)
+			fmt.Fprintf(&sb, "\x1b[38;2;%d;%d;%dm\x1b[48;2;%d;%d;%dm▀", t.R, t.G, t.B, u.R, u.G, u.B)
+		}
+		sb.WriteString("\x1b[0m")
+	}
+	return sb.String(), nil
+}