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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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9
components/pixels/snapshot.rs
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@ -4,7 +4,7 @@
use std::ops::{Deref, DerefMut};
use euclid::default::Size2D;
use euclid::default::{Rect, Size2D};
use image::codecs::jpeg::JpegEncoder;
use image::codecs::png::PngEncoder;
use image::codecs::webp::WebPEncoder;
@ -13,7 +13,7 @@ use ipc_channel::ipc::IpcSharedMemory;
use malloc_size_of_derive::MallocSizeOf;
use serde::{Deserialize, Serialize};
use crate::{EncodedImageType, Multiply, transform_inplace};
use crate::{EncodedImageType, Multiply, rgba8_get_rect, transform_inplace};
#[derive(Clone, Copy, Debug, Default, Deserialize, Eq, MallocSizeOf, PartialEq, Serialize)]
pub enum SnapshotPixelFormat {
@ -180,6 +180,11 @@ impl Snapshot<SnapshotData> {
}
}
pub fn get_rect(&self, rect: Rect<u32>) -> Self {
let data = rgba8_get_rect(self.as_raw_bytes(), self.size(), rect).to_vec();
Self::from_vec(rect.size, self.format, self.alpha_mode, data)
}
// TODO: https://github.com/servo/servo/issues/36594
/*
/// # Safety