college is generated

collage/collage.go

@@ -4,6 +4,7 @@ package collage
 import (
 	"errors"
 	"image"
+	"image/color"
 	"image/draw"
 	"image/jpeg"
 	"io"
@@ -50,6 +51,8 @@ type Request struct {
 func Make(req Request, source fs.FS, output io.Writer) error {
 	rec := image.Rect(0, 0, int(req.Aspect.Width), int(req.Aspect.Height))
 	canvas := image.NewRGBA64(rec)
+	white := color.RGBA{255, 255, 255, 255}
+	draw.Draw(canvas, rec, &image.Uniform{white}, image.Point{}, draw.Src)
 	for _, photo := range req.Photos {
 		img, err := GetImage(source, photo.ImageName)
 		if err != nil {