improve cover title

internal/epub/epub.go

@@ -296,7 +296,7 @@ func (e *ePub) Write() error {
 				return err
 			}
 		}
-		if err := wz.WriteImage(epubimageprocessing.LoadCoverTitleData(part.Cover, title, e.Image.Quality)); err != nil {
+		if err := wz.WriteImage(epubimageprocessing.CoverTitleData(part.Cover.Raw, title, e.Image.Quality)); err != nil {
 			return err
 		}
 

internal/epub/imagefilters/epub_image_filters_cover_title.go

@@ -57,16 +57,16 @@ func (p *coverTitle) Draw(dst draw.Image, src image.Image, options *gift.Options
 		dst,
 		borderArea,
 		image.Black,
-		image.Point{},
-		draw.Over,
+		borderArea.Min,
+		draw.Src,
 	)
 
 	draw.Draw(
 		dst,
 		textArea,
 		image.White,
-		image.Point{},
-		draw.Over,
+		textArea.Min,
+		draw.Src,
 	)
 
 	// Draw text

internal/epub/imageprocessing/epub_image_processing.go

@@ -116,11 +116,11 @@ func LoadImages(o *Options) ([]*epubimage.Image, error) {
 }
 
 // create a title page with the cover
-func LoadCoverTitleData(img *epubimage.Image, title string, quality int) *epubimagedata.ImageData {
+func CoverTitleData(img image.Image, title string, quality int) *epubimagedata.ImageData {
 	// Create a blur version of the cover
 	g := gift.New(epubimagefilters.CoverTitle(title))
-	dst := image.NewGray(g.Bounds(img.Raw.Bounds()))
-	g.Draw(dst, img.Raw)
+	dst := image.NewGray(g.Bounds(img.Bounds()))
+	g.Draw(dst, img)
 
 	return epubimagedata.NewRaw("OEBPS/Images/title.jpg", dst, quality)
 }

internal/epub/imageprocessing/epub_image_processing_loader.go

@@ -51,6 +51,7 @@ func (o *Options) WorkersRatio(pct int) (nbWorkers int) {
 	return
 }
 
+// Load images from input
 func (o *Options) Load() (totalImages int, output chan *tasks, err error) {
 	fi, err := os.Stat(o.Input)
 	if err != nil {