cover has minimal processing and is shared across splits (#953)

* refactor cover handling

* skip cover processing

* rename cover to cover_path

* fix scribe mobi detection

* make things closer

* rename save to save_to_epub

kindlecomicconverter/comic2ebook.py

@@ -314,12 +314,8 @@ def buildOPF(dstdir, title, filelist, cover=None):
                   "<item id=\"nav\" href=\"nav.xhtml\" ",
                   "properties=\"nav\" media-type=\"application/xhtml+xml\"/>\n"])
     if cover is not None:
-        filename = getImageFileName(cover.replace(os.path.join(dstdir, 'OEBPS'), '').lstrip('/').lstrip('\\\\'))
-        if '.png' == filename[1]:
-            mt = 'image/png'
-        else:
-            mt = 'image/jpeg'
-        f.write("<item id=\"cover\" href=\"Images/cover" + filename[1] + "\" media-type=\"" + mt +
+        mt = 'image/jpeg'
+        f.write("<item id=\"cover\" href=\"Images/cover.jpg" + "\" media-type=\"" + mt +
                 "\" properties=\"cover-image\"/>\n")
     reflist = []
     for path in filelist:
@@ -427,10 +423,9 @@ def buildOPF(dstdir, title, filelist, cover=None):
                   "</container>"])
     f.close()
 
-def buildEPUB(path, chapternames, tomenumber, ischunked):
+def buildEPUB(path, chapternames, tomenumber, ischunked, cover: image.Cover):
     filelist = []
     chapterlist = []
-    cover = None
     os.mkdir(os.path.join(path, 'OEBPS', 'Text'))
     f = open(os.path.join(path, 'OEBPS', 'Text', 'style.css'), 'w', encoding='UTF-8')
     f.writelines(["@page {\n",
@@ -508,18 +503,14 @@ def buildEPUB(path, chapternames, tomenumber, ischunked):
                       "}\n"])
     f.close()
     build_html_start = perf_counter()
+    cover.save_to_epub(os.path.join(path, 'OEBPS', 'Images', 'cover.jpg'), tomenumber)
+    options.covers.append((cover, options.uuid))
     for dirpath, dirnames, filenames in os.walk(os.path.join(path, 'OEBPS', 'Images')):
         chapter = False
         dirnames, filenames = walkSort(dirnames, filenames)
         for afile in filenames:
-            if cover is None:
-                try:
-                    cover = os.path.join(os.path.join(path, 'OEBPS', 'Images'),
-                                        'cover' + getImageFileName(afile)[1])
-                except Exception as e:
-                    raise UserWarning(f"{afile}: {e}")
-                options.covers.append((image.Cover(os.path.join(dirpath, afile), cover, options,
-                                                   tomenumber), options.uuid))
+            if afile == 'cover.jpg':
+                continue
             if not chapter:
                 chapterlist.append((dirpath.replace('Images', 'Text'), afile))
                 chapter = True
@@ -801,6 +792,7 @@ def getPanelViewSize(deviceres, size):
 def sanitizeTree(filetree):
     chapterNames = {}
     page = 1
+    cover_path = None
     for root, dirs, files in os.walk(filetree):
         dirs.sort(key=OS_SORT_KEY)
         files.sort(key=OS_SORT_KEY)
@@ -815,6 +807,8 @@ def sanitizeTree(filetree):
             key = os.path.join(root, name)
             if key != newKey:
                 os.replace(key, newKey)
+            if not cover_path:
+                cover_path = newKey
         for i, name in enumerate(dirs):
             tmpName = name
             slugified = slugify(name)
@@ -826,7 +820,7 @@ def sanitizeTree(filetree):
             if key != newKey:
                 os.replace(key, newKey)
                 dirs[i] = newKey
-    return chapterNames
+    return chapterNames, cover_path
 
 
 def flattenTree(filetree):
@@ -1242,7 +1236,9 @@ def makeBook(source, qtgui=None):
     print("Checking images...")
     getComicInfo(os.path.join(path, "OEBPS", "Images"), source)
     detectSuboptimalProcessing(os.path.join(path, "OEBPS", "Images"), source)
-    chapterNames = sanitizeTree(os.path.join(path, 'OEBPS', 'Images'))
+    chapterNames, cover_path = sanitizeTree(os.path.join(path, 'OEBPS', 'Images'))
+    cover = image.Cover(cover_path, options)
+
     if options.webtoon:
         y = image.ProfileData.Profiles[options.profile][1][1]
         comic2panel.main(['-y ' + str(y), '-i', '-m', path], qtgui)
@@ -1288,10 +1284,10 @@ def makeBook(source, qtgui=None):
         else:
             print("Creating EPUB file...")
             if len(tomes) > 1:
-                buildEPUB(tome, chapterNames, tomeNumber, True)
+                buildEPUB(tome, chapterNames, tomeNumber, True, cover)
                 filepath.append(getOutputFilename(source, options.output, '.epub', ' ' + str(tomeNumber)))
             else:
-                buildEPUB(tome, chapterNames, tomeNumber, False)
+                buildEPUB(tome, chapterNames, tomeNumber, False, cover)
                 filepath.append(getOutputFilename(source, options.output, '.epub', ''))
             makeZIP(tome + '_comic', tome, True)
         copyfile(tome + '_comic.zip', filepath[-1])

kindlecomicconverter/image.py

@@ -414,14 +414,9 @@ class ComicPage:
         self.image = crop_empty_inter_panel(self.image, direction, background_color=self.fill)
 
 class Cover:
-    def __init__(self, source, target, opt, tomeid):
+    def __init__(self, source, opt):
         self.options = opt
         self.source = source
-        self.target = target
-        if tomeid == 0:
-            self.tomeid = 1
-        else:
-            self.tomeid = tomeid
         self.image = Image.open(source)
         # backwards compatibility for Pillow >9.1.0
         if not hasattr(Image, 'Resampling'):
@@ -433,6 +428,15 @@ class Cover:
         self.image = ImageOps.autocontrast(self.image)
         if not self.options.forcecolor:
             self.image = self.image.convert('L')
+        self.crop_main_cover()
+
+        size = list(self.options.profileData[1])
+        if self.options.profile == 'KS':
+            if 'MOBI' in self.options.format or 'EPUB' in self.options.format:
+                size[1] = min(size[1], 1920)
+        self.image.thumbnail(tuple(size), Image.Resampling.LANCZOS)
+
+    def crop_main_cover(self):
         w, h = self.image.size
         if w / h > 2:
             if self.options.righttoleft:
@@ -444,12 +448,14 @@ class Cover:
                 self.image = self.image.crop((0, 0, w/2 - w * 0.03, h))
             else:
                 self.image = self.image.crop((w/2 + w * 0.03, 0, w, h))
-        self.image.thumbnail(self.options.profileData[1], Image.Resampling.LANCZOS)
-        self.save()
 
-    def save(self):
+    def save_to_epub(self, target, tomeid):
+        if tomeid == 0:
+            self.tomeid = 1
+        else:
+            self.tomeid = tomeid
         try:
-            self.image.save(self.target, "JPEG", optimize=1, quality=85)
+            self.image.save(target, "JPEG", optimize=1, quality=85)
         except IOError:
             raise RuntimeError('Failed to save cover.')