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Move unmultiply_inplace to pixels crate (#33553)

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Signed-off-by: Taym <haddadi.taym@gmail.com>
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Taym Haddadi 2024-09-27 05:28:00 +01:00 • committed by GitHub
parent fa0521481b
commit 02953d2fb6
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GPG key ID: B5690EEEBB952194
2 changed files with 10 additions and 10 deletions
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11
components/canvas/webgl_thread.rs
View file

@ -24,7 +24,7 @@ use euclid::default::Size2D;
use fnv::FnvHashMap; use fnv::FnvHashMap;
use half::f16; use half::f16;
use log::{debug, error, trace, warn}; use log::{debug, error, trace, warn};
use pixels::{self, PixelFormat}; use pixels::{self, unmultiply_inplace, PixelFormat};
use sparkle::gl; use sparkle::gl;
use sparkle::gl::{GLint, GLuint, Gl}; use sparkle::gl::{GLint, GLuint, Gl};
use surfman::chains::{PreserveBuffer, SwapChains, SwapChainsAPI}; use surfman::chains::{PreserveBuffer, SwapChains, SwapChainsAPI};
@ -2838,15 +2838,6 @@ fn premultiply_inplace(format: TexFormat, data_type: TexDataType, pixels: &mut [
} }
} }
fn unmultiply_inplace(pixels: &mut [u8]) {
for rgba in pixels.chunks_mut(4) {
let a = (rgba[3] as f32) / 255.0;
rgba[0] = (rgba[0] as f32 / a) as u8;
rgba[1] = (rgba[1] as f32 / a) as u8;
rgba[2] = (rgba[2] as f32 / a) as u8;
}
}
/// Flips the pixels in the Vec on the Y axis. /// Flips the pixels in the Vec on the Y axis.
fn flip_pixels_y( fn flip_pixels_y(
internal_format: TexFormat, internal_format: TexFormat,

9
components/pixels/lib.rs
View file

@ -197,6 +197,15 @@ pub fn detect_image_format(buffer: &[u8]) -> Result<ImageFormat, &str> {
} }
} }
pub fn unmultiply_inplace(pixels: &mut [u8]) {
for rgba in pixels.chunks_mut(4) {
let a = (rgba[3] as f32) / 255.0;
rgba[0] = (rgba[0] as f32 / a) as u8;
rgba[1] = (rgba[1] as f32 / a) as u8;
rgba[2] = (rgba[2] as f32 / a) as u8;
}
}
fn is_gif(buffer: &[u8]) -> bool { fn is_gif(buffer: &[u8]) -> bool {
buffer.starts_with(b"GIF87a") || buffer.starts_with(b"GIF89a") buffer.starts_with(b"GIF87a") || buffer.starts_with(b"GIF89a")
} }