Add end of book actions screen

lib/Txt/Txt.cpp

@@ -3,6 +3,7 @@
 #include <FsHelpers.h>
 #include <JpegToBmpConverter.h>
 #include <Logging.h>
+#include <PngToBmpConverter.h>
 
 Txt::Txt(std::string path, std::string cacheBasePath)
     : filepath(std::move(path)), cacheBasePath(std::move(cacheBasePath)) {
@@ -156,10 +157,30 @@ bool Txt::generateCoverBmp() const {
       LOG_DBG("TXT", "Generated BMP from JPG cover image");
     }
     return success;
+  } else if (FsHelpers::hasPngExtension(coverImagePath)) {
+    LOG_DBG("TXT", "Generating BMP from PNG cover image");
+    FsFile coverPng, coverBmp;
+    if (!Storage.openFileForRead("TXT", coverImagePath, coverPng)) {
+      return false;
+    }
+    if (!Storage.openFileForWrite("TXT", getCoverBmpPath(), coverBmp)) {
+      coverPng.close();
+      return false;
+    }
+    const bool success = PngToBmpConverter::pngFileToBmpStream(coverPng, coverBmp);
+    coverPng.close();
+    coverBmp.close();
+
+    if (!success) {
+      LOG_ERR("TXT", "Failed to generate BMP from PNG cover image");
+      Storage.remove(getCoverBmpPath().c_str());
+    } else {
+      LOG_DBG("TXT", "Generated BMP from PNG cover image");
+    }
+    return success;
   }
 
-  // PNG files are not supported (would need a PNG decoder)
-  LOG_ERR("TXT", "Cover image format not supported (only BMP/JPG/JPEG)");
+  LOG_ERR("TXT", "Cover image format not supported (only BMP/JPG/JPEG/PNG)");
   return false;
 }