It was a bit odd that the scene was stored per window but not the view
layer. The reasoning was that you would use different view layers for
different tasks. This is still possible, but it's more predictable to
switch them both explicitly, and with child window support manually
syncing the view layers between multiple windows is no longer needed
as often.
* Main windows show a topbar and statusbar, and select a workspace and
scene. They are created with Window > New Main Window.
* Child windows do not show a topbar or statusbar. These follow the
workspace and scene of their parent main window. Created with Window >
New Window or View > Duplicate Area into New Window.
* The purpose of this change is to support multi monitor setups where you
just want to put more editors on the other monitors. Without multiple
topbars and statusbars, working within a single workspace and scene.
Creating multiple main windows is intended to be a concious choice to
do different tasks in different workspaces and scenes.
* Note these changes do not currently affect how the operating system
treats the windows.
* When changing the workspace, the layout in all child windows changes.
This makes sense if we consider child windows to be just a way to
extend the main window across more monitors. In some case it may be
useful to keep the same layout though, we can add an option for this
depending on user feedback.
For example collapsing the lower part of the topbar with 2x interface scale
would hide the top-bar header region. There were also more asserts when changing
window size and moving area edges afterwards (same assert as in T55298).
Fixes are similar to e626998a26.
With all the recent fixes I've done, area geometry handling should be stable
again. Let's hope I'm right :)
Key shortcuts and explanation about how to use the tool should go to the
status bar, but other info can in the header so it's near where the user
is working. This distinction has not been made yet for all operators.
- Use per context menu lists to support menu editing.
- Support for different kinds of menu items since this may be needed
in the future. Only use operator types for now.
This is the first step to moving redo out of the top-bar, see: T55039
- Support for floating panels in the ScrArea has been added.
- A new region type RGN_TYPE_HUD is used for floating settings input.
- Only one HUD should be visible at a time.
- Currently HUD regions are only visible
for 3D view and image space types.
- There are currently some remaining glitches with hide/show
that need further investigation.
Since the viewport header now supports transparency, text on pulldowns
can be hard to read if their color matches the viewport content.
Background is drawn using the 'inner' theme color, that was unused until now.
* Add horizontal bar at bottom of all non-temp windows, similar to the Top-bar.
* Status-bar is hidden in UI-less fullscreen mode
* Current contents are preliminary and based on T54861:
** Left: Current file-path if needed. "(Modified)" note if file was changed.
** Center: Scene statistics (like in 2.7 Info Editor).
** Right: Progress-bars and reports
* Internally managed as own "STATUSBAR" editor-type (hidden in UI).
* Like with the Top-bar, Status-bar data and SDNA writing is disabled.
* Most changes in low-level screen/area code are to support layout bounds that differ from window bounds.
Design task: T54861
Main changes approved by @brecht.
The outliner can redraw quicker without rebuilding the tree, for example when
just moving the mouse and highlighting different items. The way this worked is
that the outliner would be tagged to avoid rebuilding, however if another
operation that does require rebuilding happens in the meantime we could go out
of sync and crash.
Dynamically sized regions in the topbar were flickering due to only updating
their size after redraws. Now there is an optional layout() callback for
all regions in an area to do UI layout first, then refresh the region layout,
and then do the actual drawing for each region.
Task T54753
For Blender 2.8 we had to be compatible with very old OpenGL versions, and
triple buffer was designed to work without offscreen rendering, by copying
the the backbuffer to a texture right before swapping. This way we could
avoid redrawing unchanged regions by copying them from this texture on the
next redraws. Triple buffer used to suffer from poor performance and driver
bugs on specific cards, so alternative draw methods remained available.
Now that we require newer OpenGL, we can have just a single draw method
that draw each region into an offscreen buffer, and then draws those to
the screen. This has some advantages:
* Poor 3D view performance when using Region Overlap should be solved now,
since we can also cache overlapping regions in offscreen buffers.
* Page flip, anaglyph and interlace stereo drawing can be a little faster
by avoiding a copy to an intermediate texture.
* The new 3D view drawing already writes to an offscreen buffer, which we
can draw from directly instead of duplicating it to another buffer.
* Eventually we will be able to remove depth and stencil buffers from the
window and save memory, though at the moment there are still some tools
using it so it's not possible yet.
* This also fixes a bug with Eevee sampling not progressing with stereo
drawing in the 3D viewport.
Differential Revision: https://developer.blender.org/D3061
