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canvas: Use snapshot in canvas backends (#37863)

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This removes assumption about pixel format from backend abstraction to
actual backend implementation. This is important for vello.

Testing: WPT tests

---------

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
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sagudev 2025-07-04 22:22:20 +02:00 • committed by GitHub
parent 8df5e1e74d
commit e1a891ea96
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10 changed files with 174 additions and 292 deletions
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10
components/canvas/backend.rs
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@ -2,15 +2,16 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use std::borrow::Cow;
use canvas_traits::canvas::{
CompositionOrBlending, FillOrStrokeStyle, LineCapStyle, LineJoinStyle, PathSegment,
};
use compositing_traits::SerializableImageData;
use euclid::Angle;
use euclid::default::{Point2D, Rect, Size2D, Transform2D, Vector2D};
use lyon_geom::Arc;
use pixels::Snapshot;
use style::color::AbsoluteColor;
use webrender_api::ImageDescriptor;
use crate::canvas_data::{CanvasPaintState, Filter, PathBuilderRef, TextRun};
@ -61,7 +62,7 @@ pub(crate) trait GenericDrawTarget<B: Backend> {
destination: Point2D<i32>,
);
fn create_similar_draw_target(&self, size: &Size2D<i32>) -> Self;
fn create_source_surface_from_data(&self, data: &[u8]) -> Option<B::SourceSurface>;
fn create_source_surface_from_data(&self, data: Snapshot) -> Option<B::SourceSurface>;
fn draw_surface(
&mut self,
surface: B::SourceSurface,
@ -113,7 +114,8 @@ pub(crate) trait GenericDrawTarget<B: Backend> {
draw_options: &B::DrawOptions,
);
fn surface(&self) -> B::SourceSurface;
fn bytes(&self) -> Cow<[u8]>;
fn image_descriptor_and_serializable_data(&self) -> (ImageDescriptor, SerializableImageData);
fn snapshot(&self) -> Snapshot;
}
/// A generic Path that abstracts the interface for raqote's PathBuilder/Path.