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Don't gate thumbnail generation on the href extension

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jpirnay
2026-05-08 23:55:45 +02:00
parent b43ba8059b
commit 481309a708
1 changed files with 52 additions and 39 deletions
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lib/Epub/Epub.cpp
+52 -39
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@@ -922,46 +922,59 @@ bool Epub::generateThumbBmp(int width, int height) const {
const auto coverImageHref = bookMetadataCache->coreMetadata.coverItemHref;
if (coverImageHref.empty()) {
LOG_DBG("EBP", "No known cover image for thumbnail");
} else if (FsHelpers::hasJpgExtension(coverImageHref)) {
const auto coverJpgTempPath = getCachePath() + "/.cover.jpg";
FsFile coverJpg;
if (!Storage.openFileForWrite("EBP", coverJpgTempPath, coverJpg)) return false;
readItemContentsToStream(coverImageHref, coverJpg, 1024);
coverJpg.close();
if (!Storage.openFileForRead("EBP", coverJpgTempPath, coverJpg)) return false;
FsFile thumbBmp;
if (!Storage.openFileForWrite("EBP", getThumbBmpPath(width, height), thumbBmp)) {
coverJpg.close();
return false;
}
const bool success = JpegToBmpConverter::jpegFileTo1BitBmpStreamWithSize(coverJpg, thumbBmp, width, height);
coverJpg.close();
thumbBmp.close();
Storage.remove(coverJpgTempPath.c_str());
if (!success) Storage.remove(getThumbBmpPath(width, height).c_str());
LOG_DBG("EBP", "Generated %dx%d thumb BMP from JPG, success: %s", width, height, success ? "yes" : "no");
return success;
} else if (FsHelpers::hasPngExtension(coverImageHref)) {
const auto coverPngTempPath = getCachePath() + "/.cover.png";
FsFile coverPng;
if (!Storage.openFileForWrite("EBP", coverPngTempPath, coverPng)) return false;
readItemContentsToStream(coverImageHref, coverPng, 1024);
coverPng.close();
if (!Storage.openFileForRead("EBP", coverPngTempPath, coverPng)) return false;
FsFile thumbBmp;
if (!Storage.openFileForWrite("EBP", getThumbBmpPath(width, height), thumbBmp)) {
coverPng.close();
return false;
}
const bool success = PngToBmpConverter::pngFileTo1BitBmpStreamWithSize(coverPng, thumbBmp, width, height);
coverPng.close();
thumbBmp.close();
Storage.remove(coverPngTempPath.c_str());
if (!success) Storage.remove(getThumbBmpPath(width, height).c_str());
LOG_DBG("EBP", "Generated %dx%d thumb BMP from PNG, success: %s", width, height, success ? "yes" : "no");
return success;
} else {
LOG_ERR("EBP", "Cover image is not a supported format, skipping thumbnail");
const auto coverTempPath = getCachePath() + "/.cover";
FsFile coverTemp;
if (!Storage.openFileForWrite("EBP", coverTempPath, coverTemp)) return false;
if (!readItemContentsToStream(coverImageHref, coverTemp, 1024)) {
coverTemp.close();
Storage.remove(coverTempPath.c_str());
return false;
}
coverTemp.close();
if (!Storage.openFileForRead("EBP", coverTempPath, coverTemp)) {
Storage.remove(coverTempPath.c_str());
return false;
}
const auto detectedFormat = detectCoverImageFormat(coverTemp);
bool success = false;
FsFile thumbBmp;
if (!Storage.openFileForWrite("EBP", getThumbBmpPath(width, height), thumbBmp)) {
coverTemp.close();
Storage.remove(coverTempPath.c_str());
return false;
}
if (detectedFormat == CoverImageFormat::Jpeg) {
LOG_DBG("EBP", "Generating %dx%d thumb BMP from JPEG cover image", width, height);
success = JpegToBmpConverter::jpegFileTo1BitBmpStreamWithSize(coverTemp, thumbBmp, width, height);
} else if (detectedFormat == CoverImageFormat::Png) {
LOG_DBG("EBP", "Generating %dx%d thumb BMP from PNG cover image", width, height);
success = PngToBmpConverter::pngFileTo1BitBmpStreamWithSize(coverTemp, thumbBmp, width, height);
} else {
LOG_DBG("EBP", "Cover image format unknown, attempting JPEG then PNG: %s", coverImageHref.c_str());
success = JpegToBmpConverter::jpegFileTo1BitBmpStreamWithSize(coverTemp, thumbBmp, width, height);
if (!success) {
thumbBmp.close();
Storage.remove(getThumbBmpPath(width, height).c_str());
if (!Storage.openFileForWrite("EBP", getThumbBmpPath(width, height), thumbBmp)) {
coverTemp.close();
Storage.remove(coverTempPath.c_str());
return false;
}
coverTemp.seek(0);
success = PngToBmpConverter::pngFileTo1BitBmpStreamWithSize(coverTemp, thumbBmp, width, height);
}
}
coverTemp.close();
thumbBmp.close();
Storage.remove(coverTempPath.c_str());
if (!success) Storage.remove(getThumbBmpPath(width, height).c_str());
LOG_DBG("EBP", "Generated %dx%d thumb BMP from cover image, success: %s", width, height, success ? "yes" : "no");
return success;
}
// Write empty sentinel to avoid repeated generation attempts