** Changed in: thumbnailer (Ubuntu)
Status: New => Opinion
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Title:
Thumbnails not working with qrc
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> Still a bit wondering why it does implement the scaling of local
images use case then at all and does not just media artwork
matching/fetching alone then.
>From the application perspective, it wants to say "give me an image in
such and such a size for this thing", where the thing could be just
* Sure it is possible to not ship artwork in a qrc. However, that
requires the developer to fiddle with the apparmor confined paths and
afaict, there's no QML-only way to do so. Besides, as I said before, the
default in our sdk templates is to put things in a qrc to ease up
development.
* I agree
Still not trying to rain on the part here... :-)
I'd like to make it work. But having images buried inside an executable
is not a good idea when it comes to interoperating with tools such as
the thumbnailer. Personally, I don't think the thumbnailer is a good fit
for this.
Is it possible to
The use case is for scaling the images. Especially in games you often
want to ship larger artwork so that the game looks good on a tablet.
However, running that game on a phone then will be slow because of the
big amount of artwork that needs to be scaled down all the time. That's
when I thought
If you guys think this is out of scope for the thumbnailer, please let
me know. I need some more flexible image cache in many places. If the
thumbnailer is not the right place to do this, I will try to come up
with something else for those cases.
The reason why I thought this would fit for the
** Changed in: thumbnailer (Ubuntu)
Status: New => Incomplete
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Title:
Thumbnails not working with qrc
To manage notifications about this
Rather than looking at what is necessary to make files compiled into an
executable visible to an external process, could we step back a bit to
find out what we're trying to accomplish?
What do you think will be done differently by having "qrc:///images
/menu-background.jpg" passed through the
** Changed in: thumbnailer (Ubuntu)
Importance: Undecided => Wishlist
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Title:
Thumbnails not working with qrc
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This looks doable, at least in principle, but raises a few questions.
How does the thumbnailer decide *where* in the file system to write the
file? Note that, if the file gets written somewhere where other
applications can read it, this will potentially allow application B to
see a thumbnail
The thumbnailer itself would not really need to know about th qrc stuff.
Just the QQmlImageProvider part of the thumbnailer package. That could
extract the image data from the qrc and pass it on to the thumbnailer.
Here's some code snipped that should give directions on how to do that:
Sorry, "The thumbnailer should not know about..."
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Title:
Thumbnails not working with qrc
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I really don't think this is a thumbnailer problem. The thumbnailer
should know about things such as qrc virtual filesystems. It simply maps
a path name to a thumbnail. That's it, and it should stay that way.
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As written in comment #3
"As the thumbnailer is remote process and thus won't have access to the
in-binary resources files, the QQmlImageProvider could perhaps extract
them from the binary, provide them to the thumbnailer and delete the
temporarily extracted original file again."
--
You
The thumbnailer is an external process, it can't see the qrc resource
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Title:
Thumbnails not working with qrc
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Well, there was definitely a bug in the thumbnailer that relates to
relative pathnames, and I just picked up on the error message you
copied.
If there is a virtual filesystem somewhere, the thumbnailer has no idea
that it exists. In a nutshell, the thumbnailer can produce a thumbnailer
for a path
I don't think this has to do with relative path names. The way .qrc
files work is that the image files are compiled into the application
binary and it sets up a virtual file system inside the binary that
contains stuff from the resource file. The path "qrc:///image.png" is
actually an absolute
> If path() expands it to a relative path with respect to the directory
containing the qrc file, it won't.
Unless the working dir of the app is the dir containing the qrc file.
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A fix for the incorrect processing of relative path names is sitting in
silo 75 at the moment. It's waiting for testing sign-off.
The thumbnailer qml plug-in just does this:
QQuickImageResponse* ThumbnailGenerator::requestImageResponse(const QString&
id, const QSize& requestedSize)
{
I just confirmed this with a snippet of code:
Works:
Image {
width: 100
height: 100
sourceSize: Qt.size(width, height)
source: "/image.png"
}
Works:
Image {
width: 100
height: 100
sourceSize: Qt.size(width, height)
source: "image://thumbnailer/file:///image.png"
}
Works:
Michi, I don't think this case should be dismissed so quickly. If one
creates a new default app template with out SDK, putting images into qrc
files is the default way to go. In order to create games that look good
on big screens like tablet, but still perform well on small screens and
weak
If you want a thumbnail for an image, you have to give an image: url to
qml.
See https://developer.ubuntu.com/en/apps/qml/tutorials/use-ubuntu-
thumbnailer/
** Changed in: thumbnailer (Ubuntu)
Status: New => Invalid
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