feat: initial commit

internal/render/png.go

@@ -0,0 +1,38 @@
+package render
+
+import (
+	"bytes"
+	"fmt"
+	"image/png"
+
+	"github.com/hytale-tools/blockymodel-merger/pkg/texture"
+)
+
+// RenderPNG renders a GLB model to PNG with the given parameters
+func RenderPNG(glbBytes []byte, atlas *texture.Atlas, rotation float64, background string, width, height int) ([]byte, error) {
+	// Parse background color
+	bgColor, err := ParseHexColor(background)
+	if err != nil {
+		return nil, fmt.Errorf("invalid background color: %w", err)
+	}
+
+	// Get atlas image
+	var atlasImage = atlas.Image
+
+	// Convert GLB to mesh
+	mesh, err := GLBToMesh(glbBytes, atlasImage)
+	if err != nil {
+		return nil, fmt.Errorf("converting GLB to mesh: %w", err)
+	}
+
+	// Render the scene
+	img := RenderScene(mesh, atlasImage, rotation, width, height, bgColor)
+
+	// Encode to PNG
+	var buf bytes.Buffer
+	if err := png.Encode(&buf, img); err != nil {
+		return nil, fmt.Errorf("encoding PNG: %w", err)
+	}
+
+	return buf.Bytes(), nil
+}