alpha2_native_gpu/
import.rs

1//! Platform-neutral descriptions used while importing native image planes.
2
3/// Supported decoded plane organizations.
4#[derive(Copy, Clone, Debug, Eq, PartialEq)]
5pub enum NativePlaneLayout {
6    /// Three independent 8-bit R8 images.
7    I420,
8    /// 8-bit R8 luma plus one interleaved RG8 chroma image.
9    Nv12,
10    /// 10-bit R16 luma plus one interleaved RG16 chroma image, left-aligned in
11    /// 16-bit containers.
12    P010,
13}
14
15impl NativePlaneLayout {
16    /// Significant bits per component.
17    #[must_use]
18    pub const fn bit_depth(self) -> u8 {
19        match self {
20            Self::I420 | Self::Nv12 => 8,
21            Self::P010 => 10,
22        }
23    }
24
25    /// Bytes one coded pixel occupies across all planes of this layout, as a
26    /// numerator over 2: 4:2:0 stores 1.5 samples a pixel.
27    #[must_use]
28    pub const fn bytes_per_pixel_numerator(self) -> u64 {
29        match self {
30            // 4:2:0 stores 1.5 samples per pixel; 10-bit doubles the container.
31            Self::I420 | Self::Nv12 => 3,
32            Self::P010 => 6,
33        }
34    }
35}
36
37/// One opaque native plane before it is wrapped by the active GPU backend.
38#[derive(Copy, Clone, Debug, Eq, PartialEq)]
39pub struct ImportedPlaneDescriptor {
40    /// Backend-native image handle.
41    pub image: u64,
42    /// Backend-native image format.
43    pub format: u32,
44    /// Plane width in samples.
45    pub width: u32,
46    /// Plane height in samples.
47    pub height: u32,
48}
alpha2_native_gpu/import.rs

alpha2_native_gpu/
import.rs
