Use function `sequence_editor.display_stack(meta_strip)` to set
displayed timeline content.
To view top-level timeline, that does not belong to any meta strip, pass
`None` as argument.
Differential Revision: https://developer.blender.org/D12048
Function `SEQ_transform_handle_overlap` was declared in sequencer module
header file, but it was defined in editor/transform module.
Move definition to sequencer module.
Function `SEQ_transform_seqbase_shuffle_time` did not have access to
strip effects, and therefore could not handle their animation. Since
now transformation knows what strips can't be directly moved, but their
position depends on other strips, this collection of strips is passed as
argument, so animation can be offset correctly.
Caused by `seq_open_anim_file` early returning if anim struct exists,
exen if it's not initialized. To ensure `anim` struct is initialized
when `openfile` argument is true, don't do early return.
Length was set properly when added, but it was clamped by function
`seq_time_effect_range_set`
Add early return for generator effects where offsets can be used
normally.
This patch makes it possible to manipulate strips without need to use
update functions to recalculate effect and meta strips.
Prior to this change function `SEQ_time_update_sequence` had to be used
to update mainly effects and meta strips. This was implemented in a way
that relied on sorted list of strips, which can't always be done and in
rare cases this approach failed.
In case of meta strips, `seqbase` had to be passed and compared with
"active" one to determine whether meta strip should be updated or not.
This is especially weak system that is prone to bugs when functions are
used by python API functions.
Finally, other strip types had startdisp` and `enddisp` fields updated
by this function and a lot of code relied on these fields even if strip
start, length and offsets are available. This is completely
unnecessary.
Implemented changes:
All effects and meta strips are updated when strip handles are moved or
strip is translated, without need to call any update function.
Function `SEQ_time_update_sequence` has been split to
`SEQ_time_update_meta_strip_range` and
`seq_time_update_effects_strip_range`. These functions should be only
used within sequencer module code. Meta update is used for versioning,
which is only reason for it not being declared internally.
Sequence fields `startdisp` and `enddisp` are now only used for
effects to store strip start and end points. These fields should be
used only internally within sequencer module code.
Use function `SEQ_time_*_handle_frame_get` to get strip start and end
points.
To update effects and meta strips with reasonable performance, cache
for "parent" meta strip and attached effects is added to
`SequenceLookup` cache, so it shares invalidation mechanisms.
All caches are populated during single iteration.
There should be no functional changes.
Differential Revision: https://developer.blender.org/D14990
To clarify term still frame: This is portion of strip that displays
static image. This area can exist before or after strip movie content.
Still frames were implemented as strip property, but this was never
displayed in panel. Only way to set still frames was to drag strip
handle with mouse or using python API. This would set either
`seq->*still` or `seq->*ofs` where * stands for `start` or `end`.
When strip had offset, it can't have still frames and vice versa, but
this had to be enforced in RNA functions and everywhere in code where
these fields are set directly. Strip can not have negative offset or
negative number of still frames.
This is not very practical approach and still frames can be simply
implemented as applying negative offset. Merging these offsets would
simplify offset calculations for example in D14962 and could make it
easier to also deprecate usage `seq->*disp` and necessity to call
update functions to recalculate strip boundaries.
For users only functional change is ability to set negative strip offset
using property in side panel.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D14976
Issue was caused by treating such strip as meta and using
`seq->channels` directly, which is not valid for scene strips.
Pointer to channels is now provided by function
`SEQ_get_seqbase_from_sequence`.
Leak was caused because output image buffer was initialized twice. Once
in speed effect strip and then by cross effect strip used for
interpolation feature.
When height is limited, it is defined by space occupied by strips,
but at least channels 1 to 7 will be always visible. This allows it to
easily overview timeline content by zooming out to maximum extent in Y
axis and panning in X axis.
More channels can be "created" on demand by moving strip to higher
channel. When strip is removed and highest channel becomes empty, view
will stay as is until it is moved down. Then new highest point is
remembered and it is not possible to pan upwards until strip is moved to
higher channel.
Limiting takes into account height of scrubbing and markers area as
well as scrollers. This means that when zoomed out to maximum extent,
no strips are obstructed by fixed UI element.
Fixes T57976
Reviewed By: Severin
Differential Revision: https://developer.blender.org/D14263
This patch adds the drag and drop strip previews in the VSE.
It also adds two new functions to the drag and drop API.
1. "draw_in_view" for callbacks that wants to draw elements in local viewport coordinates
2. "on_drag_start" that can be used for prefetching data only once at the start of the drag.
Reviewed By: Julian, Campbell
Differential Revision: http://developer.blender.org/D14560
Sometimes, when moving strip with 2 input effect attached and causing
strip overlap, this overlap is resolved incorrectly - too big offset
is applied. This is because effects are not taken into consideration
when "shuffeling" to resolve overlap.
To fix usual cases (transitions), overlap between strip and it's effect
is considered to be impossible.
There are edge cases, but these would be much more complicated to
implement and could have negative impact on performance.
Reviewed By: ISS
Differential Revision: https://developer.blender.org/D14578
Crash was caused by incorrectly assuming, that rendered strip is meta
when editing code in bulk, but this wasn't true and strip had no
channels initialized, which caused crash on NULL dereference.
Correct approach is to find list of channels where on same level as
rendered strip, similar to how `SEQ_get_seqbase_by_seq` function works
for list of strips.
Internally many offsets for BLF were integers but exposed as floats,
since these are used in pixel-space, many callers were converging them
back to integers. Simplify logic by using ints.
- Missing star prefix.
- Unnecessary indentation.
- Blank line after dot-points
(otherwise doxygen merges with the previous dot-point).
- Use back-slash for doxygen commands.
- Correct spelling.
This patch adds channel region to VSE timeline area for drawing channel
headers. It is synchronizedwith timeline region. 3 basic features are
implemented - channel visibility, locking and name.
Channel data is stored in `SeqTimelineChannel` which can be top-level
owned by `Editing`, or it is owned by meta strip to support nesting.
Strip properties are completely independent and channel properties are
applied on top of particular strip property, thus overriding it.
Implementation is separate from channel regions in other editors. This
is mainly because style and topology is quite different in VSE. But
also code seems to be much more readable this way.
Currently channels use functions similar to VSE timeline to draw
background to provide illusion of transparency, but only for background
and sfra/efra regions.
Great portion of this patch is change from using strip visibility and
lock status to include channel state - this is facilitated by functions
`SEQ_transform_is_locked` and `SEQ_render_is_muted`
Originally this included changes in D14263, but patch was split for
easier review.
Reviewed By: fsiddi, Severin
Differential Revision: https://developer.blender.org/D13836
Since e49bf4019b, animation is handled explicitly. Split operator
wasn't updated.
Re-use backup-duplicate-restore animation functions, that other
operators use for splitting.
So far it was needed to declare a new RNA struct to `RNA_access.h` manually.
Since 9b298cf3db we generate a `RNA_prototypes.h` for RNA property
declarations. Now this also includes the RNA struct declarations, so they don't
have to be added manually anymore.
Differential Revision: https://developer.blender.org/D13862
Reviewed by: brecht, campbellbarton
Last step of proxy building caused crash due to thread race contition
when acessing ed->seqbase.
Looking at code, it seems that calling IMB_close_anim_proxies on
original strips is unnecessary so this code was removed to resolve this
issue.
Locking seqbase data may be possible, but it's not very practical as
many functions access this data on demand which can easily cause
program to freeze.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D14210
