blame: src/thumbnailcache.h

#pragma once

#include <QString>

#include <QImage>

class ThumbnailCache

{

public:

    enum class Size

    {

        Normal = 128,

        Large = 256,

    };

    // Returns a non-null QImage if a valid cached thumbnail exists for sourcePath

    // at the requested size. Validity is determined by comparing the original

    // file's mtime to the Thumb::MTime tEXt chunk in the cached PNG.

    static QImage load(const QString &sourcePath, Size size);

    // Atomically writes thumbImage to the cache with the required Freedesktop

    // tEXt chunks. No-op if sourcePath cannot be stat'ed.

    static void save(const QString &sourcePath, Size size, const QImage &thumbImage);

    static QString cacheRoot();

    static QString subdirFor(Size size);

    static QString canonicalUri(const QString &absPath);

    static QString hashedName(const QString &canonicalUri);

    static bool isInsideCache(const QString &absPath);

};