… native dimensions/ratio display by default.
Also adding gimp_vector_load_procedure_extract_dimensions() public
function allowing plug-ins to query the native size or ratio of a vector
file.
I'm moving the logic of choosing a correct default for width/height by adding an
"extract dimensions" callback in the procedure. The logic is that every vector
format out there should likely have metadata either for pixel dimensions or
physical dimensions, or at the very least for no-unit dimensions (ratio only).
Vector load procedures will have to implement only the extraction of such data
in a callback called by GIMP but not how to act upon them, so that we have a
common logic for all vector images.
I am implementing this callback first in the SVG plug-in, moving all the code
to extract dimensions (and improving it) in this callback.
Also I am deleting "file-svg-load-thumb" procedure. I could simply reimplement
it using the same code, but it looks to me like this is very useless for vector
formats to have a specific thumbnail procedure (unless it were to use very
specific metadata for faster result). This is vector data, just ask it directly
at the proper bounding box size.
- Fix a few broken references and an inconsistent argument name.
- Add the new headers in the introspectable header list.
- Add a few missing class descriptions for GimpProcedure and subclasses.
It's still basic but will help to share code for support of various vector-able
formats, such as the logic for dimensioning them, but also the generated GUI.
Not only this, but we are paving the way for the link layers (though it'll be
after GIMP 3, we want plug-in procedures' API to stay stable) by giving a way
for a plug-in procedure to advertize a vector format support. This way, the core
will know when a source file is vector and can be directly reloaded at any
target size (right now, in my MR for link layers, the list of "vector" formats
is hardcoded, which is not reliable).
