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Introduces a new `AssetRepresentation` type, as a runtime only container
to hold asset information. It is supposed to become _the_ main way to
represent and refer to assets in the asset system, see T87235. It can
store things like the asset name, asset traits, preview and other asset
metadata.
Technical documentation:
https://wiki.blender.org/wiki/Source/Architecture/Asset_System/Back_End#Asset_Representation.
By introducing a proper asset representation type, we do an important
step away from the previous, non-optimal representation of assets as
files in the file browser backend, and towards the asset system as
backend. It should replace the temporary & hacky `AssetHandle` design in
the near future. Note that the loading of asset data still happens
through the file browser backend, check the linked to Wiki page for more
information on that.
As a side-effect, asset metadata isn't stored in file browser file
entries when browsing with link/append anymore. Don't think this was
ever used, but scripts may have accessed this. Can be brought back if
there's a need for it.
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Use a shorter/simpler license convention, stops the header taking so
much space.
Follow the SPDX license specification: https://spdx.org/licenses
- C/C++/objc/objc++
- Python
- Shell Scripts
- CMake, GNUmakefile
While most of the source tree has been included
- `./extern/` was left out.
- `./intern/cycles` & `./intern/atomic` are also excluded because they
use different header conventions.
doc/license/SPDX-license-identifiers.txt has been added to list SPDX all
used identifiers.
See P2788 for the script that automated these edits.
Reviewed By: brecht, mont29, sergey
Ref D14069
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The drag and drop feature of objects in 3D View has been modified to include:
- Snap the object being dragged.
- Visual feedback through a box and the placement tool grid.
Maniphest Tasks: T90198
Differential Revision: https://developer.blender.org/D12912
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This is information you'd typically want to be visible in the UI. It's optional
of course, so if not relevant, it can just remain unset.
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Catalogs work like directories on disk (without hard-/symlinks), in that
an asset is only contained in one catalog.
See T90066 for design considerations.
#### Known Limitations
Only a single catalog definition file (CDF), is supported, at
`${ASSET_LIBRARY_ROOT}/blender_assets.cats.txt`. In the future this is
to be expanded to support arbitrary CDFs (like one per blend file, one
per subdirectory, etc.).
The current implementation is based on the asset browser, which in
practice means that the asset browser owns the `AssetCatalogService`
instance for the selected asset library. In the future these instances
will be accessible via a less UI-bound asset system.
The UI is still very rudimentary, only showing the catalog ID for the
currently selected asset. Most notably, the loaded catalogs are not
shown yet. The UI is being implemented and will be merged soon.
#### Catalog Identifiers
Catalogs are internally identified by UUID. In older designs this was a
human-readable name, which has the problem that it has to be kept in
sync with its semantics (so when renaming a catalog from X to Y, the
UUID can be kept the same).
Since UUIDs don't communicate any human-readable information, the
mapping from catalog UUID to its path (stored in the Catalog Definition
File, CDF) is critical for understanding which asset is stored in which
human-readable catalog. To make this less critical, and to allow manual
data reconstruction after a CDF is lost/corrupted, each catalog also has
a "simple name" that's stored along with the UUID. This is also stored
on each asset, next to the catalog UUID.
#### Writing to Disk
Before saving asset catalogs to disk, the to-be-overwritten file gets
inspected. Any new catalogs that are found thre are loaded to memory
before writing the catalogs back to disk:
- Changed catalog path: in-memory data wins
- Catalogs deleted on disk: they are recreated based on in-memory data
- Catalogs deleted in memory: deleted on disk as well
- New catalogs on disk: are loaded and thus survive the overwriting
#### Tree Design
This implements the initial tree structure to load catalogs into. See
T90608, and the basic design in T90066.
Reviewed By: Severin
Maniphest Tasks: T91552
Differential Revision: https://developer.blender.org/D12589
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In the `FileList` struct, rename the `AssetLibraryReference
*asset_library` field to `asset_library_ref` -- it's a description of
which asset library is used, and not the asset library itself.
This is to make space for a future `AssetLibrary *asset_library` field,
which will point to an actual asset library struct/class.
No functional changes.
Reviewed by: Severin
Differential Revision: https://developer.blender.org/D12151
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Before this, all asset view templates showing the same asset library
would show the same assets, even if they should show different ID types.
That was a major limitation since the design did forsee that this
template can be put anywhere in the UI to display various sub-sets of
assets.
Initially I did the ID type filtering close to the asset-list reading,
because I wanted to optimize reading so that we would only actually read
asset information from disk of the ID type to be shown. But this will be
quite complex and I'm not sure if I'll get to work on this anytime soon.
So this commit moves the filtering to the template display level solving
this limitation.
Note: This also adds the code to filter by tags, together with the ID
type. But it's not actually used anywhere yet.
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Since recently it's possible to access assets from outside the
File/Asset Browser, via the asset view template. So we are slowly
moving away from file space specific code to dedicated asset system
code. I introduced `AssetLibraryReference` as a duplicate of
`FileSelectAssetLibraryUID`, with a plan to delete the latter in a
separate cleanup commit. That's exactly what this commit is.
This will cause Asset Browsers to open with the default "Current File"
Asset Library. We could avoid that, but it's a minor issue really.
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Note that the current asset-handle design is temporary, see
35affaa971cf. I still prefer this to be const, as code outside the
asset-list/file-list code should never mess with the file data of an
asset.
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Implements a basic, WIP version of the asset list. This is needed to
give the asset view UI template asset reading and displaying
functionality.
See:
* Asset System: Data Storage, Reading & UI Access - https://developer.blender.org/T88184
Especially the asset list internals should change. It uses the
File/Asset Browser's `FileList` API, which isn't really meant for access
from outside the File Browser. But as explained in T88184, it does a lot
of the stuff we currently need, so we (Sybren Stüvel and I) decided to
go this route for now. Work on a file-list rewrite which integrates well
with the asset system started in the `asset-system-filelist` branch.
Further includes:
* Operator to reload the asset list.
* New `bpy.types.AssetHandle.get_full_library_path()` function, which
gets the full path of the asset via the asset-list.
* Changes to preview loading to prevent the preview loading job to run
eternally for asset views. File Browsers have this issue too, but
should be fixed separately.
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With temporary I mean that this is not intended to be part of the
eventual asset system design. For that we are planning to have an
`AssetRepresentation` instead, see T87235. Once the `AssetList` is
implemented (see T88184), that would be the owner of the asset
representations.
However for the upcoming asset system, asset browser, asset view and
pose library commits we need some kind of asset handle to pass around.
That is what this commit introduces.
Idea is a handle to wrap the `FileDirEntry` representing the asset, and
an API to access its data (currently very small, will be extended in
further commits). So the fact that an asset is currently a file
internally is abstracted away. However: We have to expose it as file in
the Python API, because we can't return the asset-handle directly there,
for reasons explained in the code. So the active asset file is exposed
as `bpy.context.asset_file_handle`.
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This per-workspace active asset library will be used by the asset views
later. Note that Asset Browsers have their own active asset library,
overriding the one from the workspace.
As part of this the `FileSelectAssetLibraryUID` type gets replaced by
`AssetLibraryReference` which is on the asset level now, not the
File/Asset Browser level. But some more work is needed to complete that,
which is better done in a separate commit.
This also moves the asset library from/to enum-value logic from RNA to
the editor asset level, which will later be used by the asset view.
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Add explanations for cases the header-guard defines are still used.
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Asset metadata is what turns a regular data-block into an asset. It is a small
data-structure, but a key part of the technical design of the asset system.
The design foresees that asset data-blocks store an `ID.asset_data` pointer of
type `AssetMetaData`. This data **must not** have dependencies on other
data-blocks or data-block data, it must be an independent unit. That way we can
read asset-metadata from .blends without reading anything else from the file.
The Asset Browser will use this metadata (together with the data-block name,
preview and file path) to represent assets in the file list.
Includes:
* New `ID.asset_data` for asset metadata.
* Asset tags, description and custom properties.
* BKE code to manage asset meta-data and asset tags.
* Code to read asset data from files, without reading IDs.
* RNA for asset metadata (including tags)
Part of the first Asset Browser milestone. Check the #asset_browser_milestone_1
project milestone on developer.blender.org.
Differential Revision: https://developer.blender.org/D9716
Reviewed by: Bastien Montagne, Brecht Van Lommel
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