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gpui: Fix SVG color render, when color have alpha (#20537)

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Release Notes:

- N/A


## Demo

- [Source
SVG](https://github.com/user-attachments/assets/1c681e01-baba-4613-a3e7-ea5cb3015406)
click here open in browser.

| Before | After |
| --- | --- |
| <img width="1212" alt="image"
src="https://github.com/user-attachments/assets/ba323b13-538b-4a34-bb64-9dcf490aface">
| <img width="1212" alt="image"
src="https://github.com/user-attachments/assets/4635926a-843e-426d-89a1-4e9b4f4cc37e">
|

---------

Co-authored-by: Floyd Wang <gassnake999@gmail.com>
This commit is contained in:
Jason Lee 2024-11-16 22:53:57 +08:00 • committed by GitHub
parent 65a9c8d994
commit 932c7e23c8
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4 changed files with 24 additions and 17 deletions
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11
crates/gpui/src/color.rs
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@ -22,6 +22,17 @@ pub fn rgba(hex: u32) -> Rgba {
Rgba { r, g, b, a }
}
/// Swap from RGBA with premultiplied alpha to BGRA
pub(crate) fn swap_rgba_pa_to_bgra(color: &mut [u8]) {
color.swap(0, 2);
if color[3] > 0 {
let a = color[3] as f32 / 255.;
color[0] = (color[0] as f32 / a) as u8;
color[1] = (color[1] as f32 / a) as u8;
color[2] = (color[2] as f32 / a) as u8;
}
}
/// An RGBA color
#[derive(PartialEq, Clone, Copy, Default)]
pub struct Rgba {