Hi David,
Dr. David Alan Gilbert schrieb am 18.07.2024 um 19:37:
Hi,
(Context: PDF importing a weird document with thousands of identical
images https://bugs.documentfoundation.org/show_bug.cgi?id=88914 )
If you insert an image into a Draw document you get a
draw:frame with a draw:image inside, with the image data
The picture itself is only inside the draw:image element, if you use the
flat format (.fodp). Otherwise there is only a link to the image that is
in a separate folder.
If you duplicate that image (copy/paste), you get a second
draw:frame and second draw:image with the data again.
The image itself is only onetime in the folder. All copies have a link
to the same image.
Is there any way with draw:image not to copy the data?
That would be only relevant for a document in flat format.
I wondered if it was doable with a
draw:image xlink:href=hmmsomething
but couldn't figure out if it was possible to link back to your
own images?
The links are set automatically all to the same image. Nothing to do for
you.
But the other route is a
draw:custom-shape
to a style with a draw:fill-image-name
to a draw:fill-image
and then you can have multiple draw:custom-shape's sharing the
draw:fill-image - and hopefully the style.
Is there any downside to that?
It depends on the kind of image, what you will do with the image and in
which module you use the image.
The <draw:frame> element can contains more than one <draw:image> child
element. That is used for example for a svg-image. These child elements
have different mime-types, so that a consumer can take that one it is
able to render. If a consumer is not able to render the vector graphic,
it can take the bitmap, for example. That is not possible with a style
with image-fill.
Compared to shapes, images have specialized features:
* You can adjust color/contrast/brightness/gamma/transparency without
actually changing the image.
* The image need not be in the document itself, but can be an external
resource.
* You can define an "Image Map".
* You can define a "Contour Wrap".
* Images have events to trigger macros.
On the other hand, a custom-shape with bitmap fill can be used in
3D-mode. That allows perspective and 3-dimensional rotation.
Kind regards,
Regina
