Add ANSI256 color support.

crt.go

@@ -7,13 +7,18 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
 	"github.com/hajimehoshi/ebiten/v2/inpututil"
 	"github.com/hajimehoshi/ebiten/v2/text"
+	"github.com/lucasb-eyer/go-colorful"
 	"github.com/muesli/ansi"
+	"github.com/muesli/termenv"
 	"image"
 	"image/color"
 	"io"
 	"sync"
 )
 
+// colorCache is the ansi color cache.
+var colorCache = map[int]color.Color{}
+
 type Window struct {
 	sync.Mutex
 
@@ -313,9 +318,18 @@ func (g *Window) handleSGR(sgr any) {
 	case SGRUnsetItalic:
 		g.curWeight = FontWeightNormal
 	case SGRFgTrueColor:
-		g.curFg = color.RGBA{seq.R, seq.G, seq.B, 255}
+		g.curFg = color.RGBA{R: seq.R, G: seq.G, B: seq.B, A: 255}
 	case SGRBgTrueColor:
-		g.curBg = color.RGBA{seq.R, seq.G, seq.B, 255}
+		g.curBg = color.RGBA{R: seq.R, G: seq.G, B: seq.B, A: 255}
+	case SGRFgColor:
+		if val, ok := colorCache[seq.Id]; ok {
+			g.curFg = val
+		} else {
+			if col, err := colorful.Hex(termenv.ANSI256Color(seq.Id).String()); err == nil {
+				g.curFg = col
+				colorCache[seq.Id] = col
+			}
+		}
 	}
 }
 

examples/package-manager/main.go

@@ -78,9 +78,9 @@ type model struct {
 }
 
 var (
-	currentPkgNameStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#e7c6ff"))
+	currentPkgNameStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("211"))
 	doneStyle           = lipgloss.NewStyle().Margin(1, 2)
-	checkMark           = lipgloss.NewStyle().Foreground(lipgloss.Color("#8ac926")).SetString("✓")
+	checkMark           = lipgloss.NewStyle().Foreground(lipgloss.Color("42")).SetString("✓")
 )
 
 func newModel() model {

sgr.go

@@ -43,6 +43,14 @@ type SGRBgTrueColor struct {
 	R, G, B byte
 }
 
+type SGRFgColor struct {
+	Id int
+}
+
+type SGRBgColor struct {
+	Id int
+}
+
 // parseSGR parses a single SGR ansi sequence and returns a struct representing the sequence.
 func parseSGR(s string) ([]any, bool) {
 	if !strings.HasPrefix(s, termenv.CSI) {
@@ -83,7 +91,6 @@ func parseSGR(s string) ([]any, bool) {
 			case "23":
 				res = append(res, SGRUnsetItalic{})
 			default:
-				// TODO: Only true color is supported for now.
 				if strings.HasPrefix(s, "38;2;") {
 					var r, g, b byte
 					_, err := fmt.Sscanf(s, "38;2;%d;%d;%d", &r, &g, &b)
@@ -100,6 +107,22 @@ func parseSGR(s string) ([]any, bool) {
 						res = append(res, SGRBgTrueColor{r, g, b})
 						continue
 					}
+				} else if strings.HasPrefix(s, "38;5;") {
+					var id int
+					_, err := fmt.Sscanf(s, "38;5;%d", &id)
+					if err == nil {
+						skips = 2
+						res = append(res, SGRFgColor{id})
+						continue
+					}
+				} else if strings.HasPrefix(s, "48;5;") {
+					var id int
+					_, err := fmt.Sscanf(s, "48;5;%d", &id)
+					if err == nil {
+						skips = 2
+						res = append(res, SGRBgColor{id})
+						continue
+					}
 				}
 			}
 		}