mifr/subsurface
1
0
Fork 0
mirror of https://github.com/subsurface/subsurface.git synced 2025-02-19 22:16:15 +00:00
Code Issues Projects Releases Packages Wiki Activity

Dive pictures: save thumbnails to individual files

Browse source 
The old code loaded all thumbnails into memory at once. This does
not scale to logs with thousands of pictures. Therefore, save
the pictures to individual files and only load the currently
needed pictures.

Currently, this will make changing switching between dives slower,
because the thumbnails are loaded from disk. In the future, it
is planned to do this in a background thread without blocking
the user interface.

A notable difference to the old code: Thumbnails are now indexed
by the image-hash (i.e. the content of the raw image) and not
by the filename of the image. Thus, different paths to the same
image should only be saved once.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2018-04-29 23:07:05 +03:00 • committed by Dirk Hohndel
parent c0bca3ad04
commit 6618c9ebfc
3 changed files with 66 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

1
core/qthelper.h
View file

@ -30,6 +30,7 @@ void write_hashes();
void updateHash(struct picture *picture);
QByteArray hashFile(const QString &filename);
QString hashString(const char *filename);
QString thumbnailFileName(const QString &filename);
void learnImages(const QDir dir, int max_recursions);
void add_hash(const QString &filename, const QByteArray &hash);
void hashPicture(struct picture *picture);