refactor: use different ansi image library (#1964)

Kujtim Hoxha created

Change summary

go.mod                     |  3 ++-
go.sum                     |  6 ++++--
internal/ui/image/image.go | 38 +++++++++++++++++++++++++++++++++++---
3 files changed, 41 insertions(+), 6 deletions(-)

Detailed changes

go.mod 🔗

@@ -31,7 +31,6 @@ require (
 	github.com/charmbracelet/x/exp/ordered v0.1.0
 	github.com/charmbracelet/x/exp/slice v0.0.0-20251201173703-9f73bfd934ff
 	github.com/charmbracelet/x/exp/strings v0.0.0-20260119114936-fd556377ea59
-	github.com/charmbracelet/x/mosaic v0.0.0-20251215102626-e0db08df7383
 	github.com/charmbracelet/x/powernap v0.0.0-20260113142046-c1fa3de7983b
 	github.com/charmbracelet/x/term v0.2.2
 	github.com/denisbrodbeck/machineid v1.0.1
@@ -41,6 +40,7 @@ require (
 	github.com/google/uuid v1.6.0
 	github.com/invopop/jsonschema v0.13.0
 	github.com/joho/godotenv v1.5.1
+	github.com/jordanella/go-ansi-paintbrush v0.0.0-20240728195301-b7ad996ecf3d
 	github.com/lucasb-eyer/go-colorful v1.3.0
 	github.com/mattn/go-isatty v0.0.20
 	github.com/modelcontextprotocol/go-sdk v1.2.0
@@ -122,6 +122,7 @@ require (
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
 	github.com/goccy/go-json v0.10.5 // indirect
 	github.com/goccy/go-yaml v1.19.0 // indirect
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	github.com/google/go-cmp v0.7.0 // indirect
 	github.com/google/jsonschema-go v0.3.0 // indirect
 	github.com/google/s2a-go v0.1.9 // indirect

go.sum 🔗

@@ -122,8 +122,6 @@ github.com/charmbracelet/x/exp/strings v0.0.0-20260119114936-fd556377ea59 h1:cvP
 github.com/charmbracelet/x/exp/strings v0.0.0-20260119114936-fd556377ea59/go.mod h1:/ehtMPNh9K4odGFkqYJKpIYyePhdp1hLBRvyY4bWkH8=
 github.com/charmbracelet/x/json v0.2.0 h1:DqB+ZGx2h+Z+1s98HOuOyli+i97wsFQIxP2ZQANTPrQ=
 github.com/charmbracelet/x/json v0.2.0/go.mod h1:opFIflx2YgXgi49xVUu8gEQ21teFAxyMwvOiZhIvWNM=
-github.com/charmbracelet/x/mosaic v0.0.0-20251215102626-e0db08df7383 h1:YpTd2/abobMn/dCRM6Vo+G7JO/VS6RW0Ln3YkVJih8Y=
-github.com/charmbracelet/x/mosaic v0.0.0-20251215102626-e0db08df7383/go.mod h1:r+fiJS0jb0Z5XKO+1mgKbwbPWzTy8e2dMjBMqa+XqsY=
 github.com/charmbracelet/x/powernap v0.0.0-20260113142046-c1fa3de7983b h1:5ye9hzBKH623bMVz5auIuY6K21loCdxpRmFle2O9R/8=
 github.com/charmbracelet/x/powernap v0.0.0-20260113142046-c1fa3de7983b/go.mod h1:cmdl5zlP5mR8TF2Y68UKc7hdGUDiSJ2+4hk0h04Hsx4=
 github.com/charmbracelet/x/term v0.2.2 h1:xVRT/S2ZcKdhhOuSP4t5cLi5o+JxklsoEObBSgfgZRk=
@@ -189,6 +187,8 @@ github.com/goccy/go-yaml v1.19.0 h1:EmkZ9RIsX+Uq4DYFowegAuJo8+xdX3T/2dwNPXbxEYE=
 github.com/goccy/go-yaml v1.19.0/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
 github.com/golang-jwt/jwt/v5 v5.2.2 h1:Rl4B7itRWVtYIHFrSNd7vhTiz9UpLdi6gZhZ3wEeDy8=
 github.com/golang-jwt/jwt/v5 v5.2.2/go.mod h1:pqrtFR0X4osieyHYxtmOUWsAWrfe1Q5UVIyoH402zdk=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
 github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
@@ -221,6 +221,8 @@ github.com/invopop/jsonschema v0.13.0 h1:KvpoAJWEjR3uD9Kbm2HWJmqsEaHt8lBUpd0qHcI
 github.com/invopop/jsonschema v0.13.0/go.mod h1:ffZ5Km5SWWRAIN6wbDXItl95euhFz2uON45H2qjYt+0=
 github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
 github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/jordanella/go-ansi-paintbrush v0.0.0-20240728195301-b7ad996ecf3d h1:on25kP+Sx7sxUMRQiA8gdcToAGet4DK/EIA30mXre+4=
+github.com/jordanella/go-ansi-paintbrush v0.0.0-20240728195301-b7ad996ecf3d/go.mod h1:SV0W0APWP9MZ1/gfDQ/NzzTlWdIgYZ/ZbpN4d/UXRYw=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/kaptinlin/go-i18n v0.2.2 h1:kebVCZme/BrCTqonh/J+VYCl1+Of5C18bvyn3DRPl5M=
 github.com/kaptinlin/go-i18n v0.2.2/go.mod h1:MiwkeHryBopAhC/M3zEwIM/2IN8TvTqJQswPw6kceqM=

internal/ui/image/image.go 🔗

@@ -16,8 +16,8 @@ import (
 	uv "github.com/charmbracelet/ultraviolet"
 	"github.com/charmbracelet/x/ansi"
 	"github.com/charmbracelet/x/ansi/kitty"
-	"github.com/charmbracelet/x/mosaic"
 	"github.com/disintegration/imaging"
+	paintbrush "github.com/jordanella/go-ansi-paintbrush"
 )
 
 // Capabilities represents the capabilities of displaying images on the
@@ -246,8 +246,40 @@ func (e Encoding) Render(id string, cols, rows int) string {
 
 	switch e {
 	case EncodingBlocks:
-		m := mosaic.New().Width(cols).Height(rows).Scale(1)
-		return strings.TrimSpace(m.Render(img))
+		canvas := paintbrush.New()
+		canvas.SetImage(img)
+		canvas.SetWidth(cols)
+		canvas.SetHeight(rows)
+		canvas.Weights = map[rune]float64{
+			'': .95,
+			'': .95,
+			'▁': .9,
+			'▂': .9,
+			'▃': .9,
+			'▄': .9,
+			'▅': .9,
+			'▆': .85,
+			'█': .85,
+			'▊': .95,
+			'▋': .95,
+			'▌': .95,
+			'▍': .95,
+			'▎': .95,
+			'▏': .95,
+			'●': .95,
+			'◀': .95,
+			'▲': .95,
+			'▶': .95,
+			'▼': .9,
+			'○': .8,
+			'◉': .95,
+			'◧': .9,
+			'◨': .9,
+			'◩': .9,
+			'◪': .9,
+		}
+		canvas.Paint()
+		return strings.TrimSpace(canvas.GetResult())
 	case EncodingKitty:
 		// Build Kitty graphics unicode place holders
 		var fg color.Color