fission-render-vello
v0.10.0
Vello renderer backend for Fission display lists
Install
cargo add fission-render-vello
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Platform support
Declared by the crate author and captured when this directory was generated.
Android
Supported
iOS
Supported
Linux
Supported
macOS
Supported
Windows
Supported
Web
Supported
Terminal
Not declared
Static site
Not declared
Server-rendered
Not declared
Package metadata
crates.io
View package
Documentation
Not provided
Repository
Open link
License
MIT
Latest version
0.10.0
Downloads
717
Last updated
2026-08-02T15:19:18.182648Z
Categories
gui
graphics
rendering
Keywords
cross-platform
fission
gpu-accelerated
rendering
vello
Published versions
0.10.0
0.9.2
0.9.1
0.9.0
0.8.0
0.7.0
0.6.3
0.6.2
0.6.1
0.6.0
0.5.1
0.5.0
Dependencies
Dependency metadata is not indexed yet.
README
fission-render-vello
Vello rendering backend for the Fission UI framework.
fission-render-vello is the primary GPU rendering backend for Fission. It implements theRenderer trait by translating DisplayList operations into a Vello Scene graph, which is
then rasterized on the GPU via wgpu. Text shaping and layout are handled byParley through the VelloTextMeasurer, which also
implements the TextMeasurer trait for the layout engine. The crate includes caches for text
layouts (simple and rich), decoded images, and parsed SVG paths to keep frame times low.
Key types
Type | Description |
|---|---|
VelloRenderer<'a> | Implements fission_render::Renderer. Writes display ops into a Vello Scene using the current affine transform stack. Handles rectangles, text, rich text (with per-run styling and background highlights), images, SVG paths, inline SVG, and box shadows. |
VelloTextMeasurer | Implements fission_layout::TextMeasurer. Wraps a Parley FontContext and LayoutContext with an LRU-style layout cache (4096 simple entries, 2048 rich entries). Provides measure, measure_rich_text, hit_test, get_line_metrics, and get_caret_position. |
ParleyBrush | A simple [u8; 4] RGBA brush type used as the generic parameter for parley::layout::Layout. |
Supported display ops
•
DrawRect with fill, stroke, rounded corners, and box shadow
•
DrawText with font size, color, underline, and optional caret rendering
•
DrawRichText with per-run font size, color, underline, and background highlight
•
DrawImage with Fill, Contain, Cover, and None fit modes (image cache)
•
DrawPath from SVG path data
•
DrawSvg with viewBox-aware scaling and fill/stroke (SVG parse cache)
•
DrawSurface (video surface placeholder)
•
Save / Restore / ClipRect / ClipRoundedRect / Translate / Transform
Usage example
use fission_render_vello::{VelloRenderer, VelloTextMeasurer};
use parley::FontContext;
use std::sync::{Arc, Mutex};
use vello::Scene;
// Set up text measurement
let font_cx = Arc::new(Mutex::new(FontContext::new()));
let measurer = Arc::new(VelloTextMeasurer::new(font_cx));
// Render a frame
let mut scene = Scene::new();
let mut renderer = VelloRenderer::new(&mut scene, measurer, 2.0 /* scale factor */);
renderer.render(&display_list)?;
// `scene` is now ready to be submitted to a Vello `Renderer` backed by wgpu.
Status
Supported -- this is the default and recommended rendering backend for Fission on desktop.
Used in production by fission-shell-desktop.
License
MIT -- see the Fission repository for full documentation at https://fission.rs.
README
fission-render-vello
Vello rendering backend for the Fission UI framework.
fission-render-vello is the primary GPU rendering backend for Fission. It implements theRenderer trait by translating DisplayList operations into a Vello Scene graph, which is
then rasterized on the GPU via wgpu. Text shaping and layout are handled byParley through the VelloTextMeasurer, which also
implements the TextMeasurer trait for the layout engine. The crate includes caches for text
layouts (simple and rich), decoded images, and parsed SVG paths to keep frame times low.
Key types
Type | Description |
|---|---|
VelloRenderer<'a> | Implements fission_render::Renderer. Writes display ops into a Vello Scene using the current affine transform stack. Handles rectangles, text, rich text (with per-run styling and background highlights), images, SVG paths, inline SVG, and box shadows. |
VelloTextMeasurer | Implements fission_layout::TextMeasurer. Wraps a Parley FontContext and LayoutContext with an LRU-style layout cache (4096 simple entries, 2048 rich entries). Provides measure, measure_rich_text, hit_test, get_line_metrics, and get_caret_position. |
ParleyBrush | A simple [u8; 4] RGBA brush type used as the generic parameter for parley::layout::Layout. |
Supported display ops
•
DrawRect with fill, stroke, rounded corners, and box shadow
•
DrawText with font size, color, underline, and optional caret rendering
•
DrawRichText with per-run font size, color, underline, and background highlight
•
DrawImage with Fill, Contain, Cover, and None fit modes (image cache)
•
DrawPath from SVG path data
•
DrawSvg with viewBox-aware scaling and fill/stroke (SVG parse cache)
•
DrawSurface (video surface placeholder)
•
Save / Restore / ClipRect / ClipRoundedRect / Translate / Transform
Usage example
use fission_render_vello::{VelloRenderer, VelloTextMeasurer};
use parley::FontContext;
use std::sync::{Arc, Mutex};
use vello::Scene;
// Set up text measurement
let font_cx = Arc::new(Mutex::new(FontContext::new()));
let measurer = Arc::new(VelloTextMeasurer::new(font_cx));
// Render a frame
let mut scene = Scene::new();
let mut renderer = VelloRenderer::new(&mut scene, measurer, 2.0 /* scale factor */);
renderer.render(&display_list)?;
// `scene` is now ready to be submitted to a Vello `Renderer` backed by wgpu.
Status
Supported -- this is the default and recommended rendering backend for Fission on desktop.
Used in production by fission-shell-desktop.
License
MIT -- see the Fission repository for full documentation at https://fission.rs.
Package metadata
crates.io
View package
Documentation
Not provided
Repository
Open link
License
MIT
Latest version
0.10.0
Downloads
717
Last updated
2026-08-02T15:19:18.182648Z
Categories
gui
graphics
rendering
Keywords
cross-platform
fission
gpu-accelerated
rendering
vello
Published versions
0.10.0
0.9.2
0.9.1
0.9.0
0.8.0
0.7.0
0.6.3
0.6.2
0.6.1
0.6.0
0.5.1
0.5.0
Dependencies
Dependency metadata is not indexed yet.