Simplify and document hocr package slightly better

1 files changed, 6 insertions, 7 deletions

diff --git a/pkg/hocr/lines.go b/pkg/hocr/lines.go
index d2983be..3e4dc65 100644
--- a/pkg/hocr/lines.go
+++ b/pkg/hocr/lines.go
@@ -9,7 +9,6 @@ import (
 	_ "image/jpeg"
 	_ "image/png"
 	"io/ioutil"
-	"log"
 	"os"
 	"path/filepath"
 	"strings"
@@ -85,6 +84,8 @@ func parseLineDetails(h Hocr, i *image.Gray, name string) (line.Details, error)
 	return lines, nil
 }
 
+// GetLineDetails parses a hocr file and returns a corresponding
+// line.Details, including image extracts for each line.
 func GetLineDetails(hocrfn string) (line.Details, error) {
 	var newlines line.Details
 
@@ -102,14 +103,10 @@ func GetLineDetails(hocrfn string) (line.Details, error) {
 	var gray *image.Gray
 	pngfn := strings.Replace(hocrfn, ".hocr", ".png", 1)
 	pngf, err := os.Open(pngfn)
-	if err != nil {
-		log.Println("Warning: can't open image %s\n", pngfn)
-	} else {
+	if err == nil {
 		defer pngf.Close()
 		img, _, err = image.Decode(pngf)
-		if err != nil {
-			log.Println("Warning: can't load image %s\n", pngfn)
-		} else {
+		if err == nil {
 			b := img.Bounds()
 			gray = image.NewGray(image.Rect(0, 0, b.Dx(), b.Dy()))
 			draw.Draw(gray, b, img, b.Min, draw.Src)
@@ -120,6 +117,8 @@ func GetLineDetails(hocrfn string) (line.Details, error) {
 	return parseLineDetails(h, gray, n)
 }
 
+// GetLineBasics parses a hocr file and returns a corresponding
+// line.Details, without any image extracts.
 func GetLineBasics(hocrfn string) (line.Details, error) {
 	var newlines line.Details