From 673a7df699609885f92c2482a783df47f46c942b Mon Sep 17 00:00:00 2001
From: celogeek <65178+celogeek@users.noreply.github.com>
Date: Sat, 15 Feb 2025 17:28:42 +0100
Subject: [PATCH] force cover and title to use jpeg format

---
 internal/pkg/epubimageprocessor/processor.go | 4 ++--
 internal/pkg/epubtemplates/content.go        | 4 ++--
 pkg/epub/epub.go                             | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/internal/pkg/epubimageprocessor/processor.go b/internal/pkg/epubimageprocessor/processor.go
index bb2c368..98df60c 100644
--- a/internal/pkg/epubimageprocessor/processor.go
+++ b/internal/pkg/epubimageprocessor/processor.go
@@ -320,8 +320,8 @@ func (e EPUBImageProcessor) CoverTitleData(o CoverTitleDataOptions) (epubzip.Ima
 	g.Draw(dst, o.Src)
 
 	return epubzip.CompressImage(
-		"OEBPS/Images/"+o.Name+"."+e.Image.Format,
-		e.Image.Format,
+		"OEBPS/Images/"+o.Name+".jpeg",
+		"jpeg",
 		dst,
 		e.Image.Quality,
 	)
diff --git a/internal/pkg/epubtemplates/content.go b/internal/pkg/epubtemplates/content.go
index 7de258d..aa5483f 100644
--- a/internal/pkg/epubtemplates/content.go
+++ b/internal/pkg/epubtemplates/content.go
@@ -160,13 +160,13 @@ func (o Content) getManifest() []tag {
 		{"item", tagAttrs{"id": "toc", "href": "toc.xhtml", "properties": "nav", "media-type": "application/xhtml+xml"}, ""},
 		{"item", tagAttrs{"id": "css", "href": "Text/style.css", "media-type": "text/css"}, ""},
 		{"item", tagAttrs{"id": "page_cover", "href": "Text/cover.xhtml", "media-type": "application/xhtml+xml"}, ""},
-		{"item", tagAttrs{"id": "img_cover", "href": "Images/cover." + o.ImageOptions.Format, "media-type": o.ImageOptions.MediaType()}, ""},
+		{"item", tagAttrs{"id": "img_cover", "href": "Images/cover.jpeg", "media-type": "image/jpeg"}, ""},
 	}
 
 	if o.HasTitlePage {
 		items = append(items,
 			tag{"item", tagAttrs{"id": "page_title", "href": "Text/title.xhtml", "media-type": "application/xhtml+xml"}, ""},
-			tag{"item", tagAttrs{"id": "img_title", "href": "Images/title." + o.ImageOptions.Format, "media-type": o.ImageOptions.MediaType()}, ""},
+			tag{"item", tagAttrs{"id": "img_title", "href": "Images/title.jpeg", "media-type": "image/jpeg"}, ""},
 		)
 
 		if !o.ImageOptions.View.PortraitOnly {
diff --git a/pkg/epub/epub.go b/pkg/epub/epub.go
index debba78..9c44d66 100644
--- a/pkg/epub/epub.go
+++ b/pkg/epub/epub.go
@@ -115,7 +115,7 @@ func (e epub) writeCoverImage(wz epubzip.EPUBZip, img epubimage.EPUBImage, part,
 		[]byte(e.render(epubtemplates.Text, map[string]any{
 			"Title":      title,
 			"ViewPort":   e.Image.View.Port(),
-			"ImagePath":  "Images/cover." + e.Image.Format,
+			"ImagePath":  "Images/cover.jpeg",
 			"ImageStyle": img.ImgStyle(e.Image.View.Width, e.Image.View.Height, ""),
 		})),
 	); err != nil {
@@ -172,7 +172,7 @@ func (e epub) writeTitleImage(wz epubzip.EPUBZip, img epubimage.EPUBImage, title
 		[]byte(e.render(epubtemplates.Text, map[string]any{
 			"Title":      title,
 			"ViewPort":   e.Image.View.Port(),
-			"ImagePath":  "Images/title." + e.Image.Format,
+			"ImagePath":  "Images/title.jpeg",
 			"ImageStyle": img.ImgStyle(e.Image.View.Width, e.Image.View.Height, titleAlign),
 		})),
 	); err != nil {