minor refactor

collage/collage.go

@@ -48,7 +48,7 @@ type Request struct {
 	Photos          []Photo   `json:"photos"`
 }
 
-func Make(req Request, source fs.FS, output io.Writer) error {
+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}

collage/collage_test.go

@@ -67,7 +67,7 @@ func TestMake(t *testing.T) {
 		t.Fatalf("failed to create ouput image file %v", err)
 	}
 
-	err = Make(req, testDataFS, out)
+	err = Make(&req, testDataFS, out)
 	if err != nil {
 		t.Fatalf("failed to make collage %v", err)
 	}