正文规则添加图片样式规则,可以设置为FULL

app/src/main/java/io/legado/app/service/help/ReadBook.kt

@@ -313,7 +313,13 @@ object ReadBook {
                 when (chapter.index) {
                     durChapterIndex -> {
                         curTextChapter =
-                            ChapterProvider.getTextChapter(book, chapter, contents, chapterSize)
+                            ChapterProvider.getTextChapter(
+                                book,
+                                chapter,
+                                contents,
+                                chapterSize,
+                                imageStyle
+                            )
                         if (upContent) callBack?.upContent(resetPageOffset = resetPageOffset)
                         callBack?.upView()
                         curPageChanged()
@@ -322,12 +328,24 @@ object ReadBook {
                     }
                     durChapterIndex - 1 -> {
                         prevTextChapter =
-                            ChapterProvider.getTextChapter(book, chapter, contents, chapterSize)
+                            ChapterProvider.getTextChapter(
+                                book,
+                                chapter,
+                                contents,
+                                chapterSize,
+                                imageStyle
+                            )
                         if (upContent) callBack?.upContent(-1, resetPageOffset)
                     }
                     durChapterIndex + 1 -> {
                         nextTextChapter =
-                            ChapterProvider.getTextChapter(book, chapter, contents, chapterSize)
+                            ChapterProvider.getTextChapter(
+                                book,
+                                chapter,
+                                contents,
+                                chapterSize,
+                                imageStyle
+                            )
                         if (upContent) callBack?.upContent(1, resetPageOffset)
                     }
                 }
@@ -338,6 +356,8 @@ object ReadBook {
         }
     }
 
+    private val imageStyle get() = webBook?.bookSource?.ruleContent?.imageStyle
+
     fun saveRead() {
         Coroutine.async {
             book?.let { book ->

app/src/main/java/io/legado/app/ui/book/read/page/provider/ChapterProvider.kt

@@ -51,7 +51,8 @@ object ChapterProvider {
         book: Book,
         bookChapter: BookChapter,
         contents: List<String>,
-        chapterSize: Int
+        chapterSize: Int,
+        imageStyle: String?
     ): TextChapter {
         val textPages = arrayListOf<TextPage>()
         val pageLines = arrayListOf<Int>()
@@ -69,7 +70,7 @@ object ChapterProvider {
                 src?.let {
                     durY =
                         setTypeImage(
-                            book, bookChapter, src, durY, textPages
+                            book, bookChapter, src, durY, textPages, imageStyle
                         )
                 }
             } else {
@@ -116,25 +117,32 @@ object ChapterProvider {
         chapter: BookChapter,
         src: String,
         y: Float,
-        textPages: ArrayList<TextPage>
+        textPages: ArrayList<TextPage>,
+        imageStyle: String?
     ): Float {
         var durY = y
         ImageProvider.getImage(book, chapter.index, src)?.let {
             var height = it.height
             var width = it.width
-            if (it.width > visibleWidth) {
+            when (imageStyle?.toUpperCase()) {
-                height = it.height * visibleWidth / it.width
+                "FULL" -> {
-                width =
+                    width = visibleWidth
-                    visibleWidth
+                    height = it.width / width * it.height
-            }
+                }
-            if (height > visibleHeight) {
+                else -> {
-                width = width * visibleHeight / height
+                    if (it.width > visibleWidth) {
-                height =
+                        height = it.height * visibleWidth / it.width
-                    visibleHeight
+                        width = visibleWidth
-            }
+                    }
-            if (durY + height > visibleHeight) {
+                    if (height > visibleHeight) {
-                textPages.add(TextPage())
+                        width = width * visibleHeight / height
-                durY = 0f
+                        height = visibleHeight
+                    }
+                    if (durY + height > visibleHeight) {
+                        textPages.add(TextPage())
+                        durY = 0f
+                    }
+                }
             }
             val textLine = TextLine(isImage = true)
             textLine.lineTop = durY