Fixes a regression introduced in
https://github.com/zed-industries/zed/pull/34992
### Background
Paths are rendered first to an intermediate MSAA texture, and then
copied to the final drawable. Because paths can have transparency, it's
important that pixels are not copied repeatedly if paths have
overlapping bounding boxes. When N paths have the same draw order, we
infer that they must have disjoint bounding boxes, so that we can copy
them each individually (as opposed to copying a single rect that
contains them all). Previously, the bounding box that we were using to
copy paths was not accounting for the path's content mask (but it is
accounted for in the bounds tree that determines their draw order).
This cause bugs like this, where certain path pixels spuriously had
their opacity doubled:
https://github.com/user-attachments/assets/d792e60c-790b-49ad-b435-6695daba430f
This PR fixes that bug.
* [x] mac
* [x] linux
* [x] windows
Release Notes:
- Fixed a bug where a selection's opacity was computed incorrectly when
it overlapped with another editor's selections in a certain way.
This is another attempt to solve the same problem as
https://github.com/zed-industries/zed/pull/29718, while avoiding the
regression on Intel GPUs.
### Background
Currently, on main, all paths are first rendered to an intermediate
"atlas" texture, similar to what we use for rendering glyphs, but with
multi-sample antialiasing enabled. They are then drawn into our actual
frame buffer in a separate pass, via the "path sprite" shaders.
Notably, the intermediate texture acts as an "atlas" - the paths are
laid out in a non-overlapping way, so that each path could be copied to
an arbitrary position in the final scene. This non-overlapping approach
makes a lot sense for Glyphs (which are frequently re-used in multiple
places within a frame, and even across frames), but paths do not have
these properties.
* we clear the atlas every frame
* we rasterize each path separately. there is no deduping.
The problem with our current approach is that the path atlas textures
can end up using lots of VRAM if the scene contains many paths. This is
more of a problem in other apps that use GPUI than it is in Zed, but I
do think it's an issue for Zed as well. On Windows, I have hit some
crashes related to GPU memory.
In https://github.com/zed-industries/zed/pull/29718, @sunli829
simplified path rendering to just draw directly to the frame buffer, and
enabled msaa for the whole frame buffer. But apparently this doesn't
work well on Intel GPUs because MSAA is slow on those GPUs. So we
reverted that PR.
### Solution
With this PR, we rasterize paths to an intermediate texture with MSAA.
But rather than treating this intermediate texture like an *atlas*
(growing it in order to allocate non-overlapping rectangles for every
path), we simply use a single fixed-size, color texture that is the same
size as thew viewport. In this texture, we rasterize the paths in their
final screen position, allowing them to overlap. Then we simply blit
them from the resolved texture to the frame buffer.
### To do
* [x] Implement for Metal
* [x] Implement for Blade
* [x] Fix content masking for paths
* [x] Fix rendering of partially transparent paths
* [x] Verify that this performs well on Intel GPUs (help @notpeter 🙏 )
* [ ] Profile and optimize
Release Notes:
- N/A
---------
Co-authored-by: Junkui Zhang <364772080@qq.com>
Reverts zed-industries/zed#29718
We've noticed some issues with Zed on Intel-based Macs where typing has
become sluggish, and git bisect has seemed to point towards this PR.
Reverting for now, until we can understand why it is causing this issue.
Currently, the rendering path required creating a texture for each path,
which wasted a large amount of video memory. In our application, simply
drawing some charts resulted in video memory usage as high as 5G.
I removed the step of creating path textures and directly drew the paths
on the rendering target, adding post-processing global multi-sampling
anti-aliasing. Drawing paths no longer requires allocating any
additional video memory and also improves the performance of path
rendering.
Release Notes:
- N/A
---------
Co-authored-by: Jason Lee <huacnlee@gmail.com>
Editing JSON styles is not very helpful for bringing style changes back
to the actual code. This PR adds a buffer that pretends to be Rust,
applying any style attribute identifiers it finds. Also supports
completions with display of documentation. The effect of the currently
selected completion is previewed. Warning diagnostics appear on any
unrecognized identifier.
https://github.com/user-attachments/assets/af39ff0a-26a5-4835-a052-d8f642b2080c
Adds a `#[derive_inspector_reflection]` macro which allows these methods
to be enumerated and called by their name. The macro code changes were
95% generated by Zed Agent + Opus 4.
Release Notes:
* Added an element inspector for development. On debug builds,
`dev::ToggleInspector` will open a pane allowing inspecting of element
info and modifying styles.
Open inspector with `dev: toggle inspector` from command palette or
`cmd-alt-i` on mac or `ctrl-alt-i` on linux.
https://github.com/user-attachments/assets/54c43034-d40b-414e-ba9b-190bed2e6d2f
* Picking of elements via the mouse, with scroll wheel to inspect
occluded elements.
* Temporary manipulation of the selected element.
* Layout info and JSON-based style manipulation for `Div`.
* Navigation to code that constructed the element.
Big thanks to @as-cii and @maxdeviant for sorting out how to implement
the core of an inspector.
Release Notes:
- N/A
---------
Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Marshall Bowers <git@maxdeviant.com>
Co-authored-by: Federico Dionisi <code@fdionisi.me>
Swift bindings BEGONE
Release Notes:
- Switched from using the Swift LiveKit bindings, to the Rust bindings,
fixing https://github.com/zed-industries/zed/issues/9396, a crash when
leaving a collaboration session, and making Zed easier to build.
---------
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
Co-authored-by: Michael Sloan <michael@zed.dev>
Features:
* Scales dash spacing with border width.
* Laying out dashes around rounded corners.
* Varying border widths with rounded corners - now uses an ellipse for the inner edge of the border.
* When there are no rounded corners, each straight border is laid out separately, so that the dashes to meet at the corners.
* All sides of each dash are antialiased.
Release Notes:
- N/A
---------
Co-authored-by: Michael Sloan <michael@zed.dev>
Co-authored-by: Ben <ben@zed.dev>
Found this while looking into adding support for the Surface primitive
on Linux, for rendering video shares. In that case it would be
expensive to compare images for equality. `Eq` and `PartialEq` were
being required but not used here due to use of `Ord` and `PartialOrd`.
Release Notes:
- N/A
This will allow us to compile debug builds of the remote-server for a
different architecture than the one we are developing on.
This also adds a CI step for building our remote server with minimal
dependencies.
Release Notes:
- N/A
Release Notes:
- N/A
---
Add this for let GPUI element to support fade in-out animation.
## Platform test
- [x] macOS
- [x] blade `cargo run -p gpui --example opacity --features macos-blade`
## Usage
```rs
div()
.opacity(0.5)
.bg(gpui::black())
.text_color(gpui::black())
.child("Hello world")
```
This will apply the `opacity` it self and all children to use `opacity`
value to render colors.
## Example
```
cargo run -p gpui --example opacity
cargo run -p gpui --example opacity --features macos-blade
```
<img width="612" alt="image"
src="https://github.com/user-attachments/assets/f1da87ed-31f5-4b55-a023-39e8ee1ba349">
For future reference: WIP branch of copy/pasting a mixture of images and
text: https://github.com/zed-industries/zed/tree/copy-paste-images -
we'll come back to that one after landing this one.
Release Notes:
- You can now paste images into the Assistant Panel to include them as
context. Currently works only on Mac, and with Anthropic models. Future
support is planned for more models, operating systems, and image
clipboard operations.
---------
Co-authored-by: Antonio <antonio@zed.dev>
Co-authored-by: Mikayla <mikayla@zed.dev>
Co-authored-by: Jason <jason@zed.dev>
Co-authored-by: Kyle <kylek@zed.dev>
See https://zed.dev/channel/gpui-536
Fixes https://github.com/zed-industries/zed/issues/9010
Fixes https://github.com/zed-industries/zed/issues/8883
Fixes https://github.com/zed-industries/zed/issues/8640
Fixes https://github.com/zed-industries/zed/issues/8598
Fixes https://github.com/zed-industries/zed/issues/8579
Fixes https://github.com/zed-industries/zed/issues/8363
Fixes https://github.com/zed-industries/zed/issues/8207
### Problem
After transitioning Zed to GPUI 2, we started noticing that interacting
with the mouse on many UI elements would lead to a pretty annoying
flicker. The main issue with the old approach was that hover state was
calculated based on the previous frame. That is, when computing whether
a given element was hovered in the current frame, we would use
information about the same element in the previous frame.
However, inspecting the previous frame tells us very little about what
should be hovered in the current frame, as elements in the current frame
may have changed significantly.
### Solution
This pull request's main contribution is the introduction of a new
`after_layout` phase when redrawing the window. The key idea is that
we'll give every element a chance to register a hitbox (see
`ElementContext::insert_hitbox`) before painting anything. Then, during
the `paint` phase, elements can determine whether they're the topmost
and draw their hover state accordingly.
We are also removing the ability to give an arbitrary z-index to
elements. Instead, we will follow the much simpler painter's algorithm.
That is, an element that gets painted after will be drawn on top of an
element that got painted earlier. Elements can still escape their
current "stacking context" by using the new `ElementContext::defer_draw`
method (see `Overlay` for an example). Elements drawn using this method
will still be logically considered as being children of their original
parent (for keybinding, focus and cache invalidation purposes) but their
layout and paint passes will be deferred until the currently-drawn
element is done.
With these changes we also reworked geometry batching within the
`Scene`. The new approach uses an AABB tree to determine geometry
occlusion, which allows the GPU to render non-overlapping geometry in
parallel.
### Performance
Performance is slightly better than on `main` even though this new
approach is more correct and we're maintaining an extra data structure
(the AABB tree).
Release Notes:
- Fixed a bug that was causing popovers to flicker.
---------
Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Thorsten <thorsten@zed.dev>
This practice makes it difficult to locate todo!s in my code when I'm
working. Let's take out the bang if we want to keep doing this.
Release Notes:
- N/A
Reverts zed-industries/zed#7481
This would regress performance because we'd be using the standard
library's hash maps everywhere, so reverting for now.
With upcoming release of 1.76 I did a check of current +beta (which
seems to already be at 1.77). These would cause CI pipeline failures
once 1.77 is out.
Release Notes:
- N/A
This optimizes rendering time by saving computation of the layer_id and
comparison when inserting it into the `BTreeMaps`.
Co-authored-by: Antonio <antonio@zed.dev>
Before this change we wouldn't submit all possible primitives of the
same kind that are less-than the max order.
Result was that we would submit, say, 10 paths each in a separate batch
instead of actually batching them.
This was overly strict because even if the order of two different
primitives was the same, we could have still batched the 1st primitive
kind, if its implicit ordering was less than 2nd kind.
Example: say we have the following primitives and these orders
5x paths, order 3
2x sprites, order 3
Previously, we would submit 1 path, 1 path, 1 path, 1 path, 1 path, then
the sprites.
With this changes, we batch the 5 paths into one batch.
Co-authored-by: Antonio <antonio@zed.dev>
