1 files changed, 158 insertions, 0 deletions
diff --git a/lib/image_renderer.go b/lib/image_renderer.go
new file mode 100644
index 0000000..03a8059
--- /dev/null
+++ b/lib/image_renderer.go
@@ -0,0 +1,158 @@
+package lib
+
+import (
+	"bytes"
+	"encoding/base64"
+	"fmt"
+	"image"
+	"image/color"
+	"image/jpeg"
+	"image/png"
+	"os"
+	"strings"
+
+	"golang.org/x/image/draw"
+)
+
+type ImageRenderer struct {
+	method string
+}
+
+func NewImageRenderer() *ImageRenderer {
+	method := determineRenderMethod()
+	return &ImageRenderer{method: method}
+}
+
+func determineRenderMethod() string {
+	if os.Getenv("TERM") == "xterm-kitty" {
+		return "kitty"
+	} else if os.Getenv("TERM_PROGRAM") == "iTerm.app" {
+		return "iterm2"
+	} else if os.Getenv("TERM") == "xterm-256color" && os.Getenv("VTE_VERSION") != "" {
+		return "sixel"
+	}
+	return "none"
+}
+
+func (r *ImageRenderer) RenderImage(img image.Image, width, height int) string {
+	switch r.method {
+	case "kitty":
+		return r.renderKitty(img, width, height)
+	case "iterm2":
+		return r.renderITerm2(img, width, height)
+	case "sixel":
+		return r.renderSixel(img, width, height)
+	case "ascii":
+		return r.renderASCII(img, width, height)
+	default:
+		return ""
+	}
+}
+
+func (r *ImageRenderer) renderKitty(img image.Image, width, height int) string {
+	resized := image.NewRGBA(image.Rect(0, 0, width, height))
+	draw.NearestNeighbor.Scale(resized, resized.Rect, img, img.Bounds(), draw.Over, nil)
+
+	var buf bytes.Buffer
+	png.Encode(&buf, resized)
+	encoded := base64.StdEncoding.EncodeToString(buf.Bytes())
+
+	// Split the encoded data into chunks
+	const chunkSize = 4096
+	chunks := make([]string, 0, (len(encoded)+chunkSize-1)/chunkSize)
+	for i := 0; i < len(encoded); i += chunkSize {
+		end := i + chunkSize
+		if end > len(encoded) {
+			end = len(encoded)
+		}
+		chunks = append(chunks, encoded[i:end])
+	}
+
+	// Build the Kitty graphics protocol command
+	var result strings.Builder
+	for i, chunk := range chunks {
+		if i == 0 {
+			result.WriteString(fmt.Sprintf("\033_Ga=T,f=100,s=%d,v=%d,m=1;", width, height))
+		} else {
+			result.WriteString("\033_Gm=1;")
+		}
+		result.WriteString(chunk)
+		result.WriteString("\033\\")
+	}
+
+	// Final chunk
+	result.WriteString("\033_Gm=0;\033\\")
+
+	return result.String()
+}
+
+func (r *ImageRenderer) renderITerm2(img image.Image, width, height int) string {
+	// Implement iTerm2 inline image protocol
+	var buf bytes.Buffer
+	jpeg.Encode(&buf, img, nil)
+	encoded := base64.StdEncoding.EncodeToString(buf.Bytes())
+	return fmt.Sprintf("\033]1337;File=inline=1;width=%dpx;height=%dpx:%s\a", width, height, encoded)
+}
+
+func (r *ImageRenderer) renderSixel(img image.Image, width, height int) string {
+	resized := image.NewRGBA(image.Rect(0, 0, width, height))
+	draw.NearestNeighbor.Scale(resized, resized.Rect, img, img.Bounds(), draw.Over, nil)
+
+	// Convert to Sixel
+	var sb strings.Builder
+	sb.WriteString("\033Pq") // Start Sixel sequence
+	sb.WriteString("\"1;1;") // Set color mode and aspect ratio
+	sb.WriteString(fmt.Sprintf("%d;%d", width, height))
+	sb.WriteString("\n")
+
+	// Simple color quantization (this can be improved)
+	palette := make(map[color.Color]int)
+	colorIndex := 0
+
+	for y := 0; y < height; y++ {
+		sixelRow := make([]int, width)
+		for x := 0; x < width; x++ {
+			c := resized.At(x, y)
+			if _, exists := palette[c]; !exists {
+				palette[c] = colorIndex
+				colorIndex++
+				r, g, b, _ := c.RGBA()
+				sb.WriteString(fmt.Sprintf("#%d;2;%d;%d;%d", palette[c], r>>8, g>>8, b>>8))
+			}
+			sixelRow[x] = palette[c]
+		}
+
+		// Encode sixel data
+		for i := 0; i < 6; i++ {
+			for _, colorIdx := range sixelRow {
+				sb.WriteByte(byte('?' + ((colorIdx >> i) & 1)))
+			}
+			sb.WriteByte('-')
+		}
+		sb.WriteByte('\n')
+	}
+
+	sb.WriteString("\033\\") // End Sixel sequence
+	return sb.String()
+}
+
+func (r *ImageRenderer) renderASCII(img image.Image, width, height int) string {
+	// Implement a simple ASCII art renderer
+	// This is a very basic implementation and can be improved
+	bounds := img.Bounds()
+	ascii := ""
+	for y := bounds.Min.Y; y < bounds.Max.Y; y += height / 10 {
+		for x := bounds.Min.X; x < bounds.Max.X; x += width / 20 {
+			c := img.At(x, y)
+			r, g, b, _ := c.RGBA()
+			avg := (r + g + b) / 3
+			if avg > 32768 {
+				ascii += " "
+			} else {
+				ascii += "#"
+			}
+		}
+		ascii += "\n"
+	}
+	return ascii
+}