drm/control/
dumbbuffer.rs

Help
1//!
2//! # DumbBuffer
3//!
4//! Memory-supported, slow, but easy & cross-platform buffer implementation
5//!
6
7use crate::buffer;
8
9use std::borrow::{Borrow, BorrowMut};
10use std::ops::{Deref, DerefMut};
11
12#[derive(Debug, Copy, Clone, PartialEq, Eq)]
13/// Slow, but generic [`buffer::Buffer`] implementation
14pub struct DumbBuffer {
15    pub(crate) size: (u32, u32),
16    pub(crate) length: usize,
17    pub(crate) format: buffer::DrmFourcc,
18    pub(crate) pitch: u32,
19    pub(crate) handle: buffer::Handle,
20}
21
22/// Mapping of a [`DumbBuffer`]
23pub struct DumbMapping<'a> {
24    pub(crate) _phantom: core::marker::PhantomData<&'a ()>,
25    pub(crate) map: &'a mut [u8],
26}
27
28impl AsRef<[u8]> for DumbMapping<'_> {
29    fn as_ref(&self) -> &[u8] {
30        self.map
31    }
32}
33
34impl AsMut<[u8]> for DumbMapping<'_> {
35    fn as_mut(&mut self) -> &mut [u8] {
36        self.map
37    }
38}
39
40impl Borrow<[u8]> for DumbMapping<'_> {
41    fn borrow(&self) -> &[u8] {
42        self.map
43    }
44}
45
46impl BorrowMut<[u8]> for DumbMapping<'_> {
47    fn borrow_mut(&mut self) -> &mut [u8] {
48        self.map
49    }
50}
51
52impl Deref for DumbMapping<'_> {
53    type Target = [u8];
54
55    fn deref(&self) -> &Self::Target {
56        self.map
57    }
58}
59
60impl DerefMut for DumbMapping<'_> {
61    fn deref_mut(&mut self) -> &mut Self::Target {
62        self.map
63    }
64}
65
66impl<'a> Drop for DumbMapping<'a> {
67    fn drop(&mut self) {
68        unsafe {
69            rustix::mm::munmap(self.map.as_mut_ptr() as *mut _, self.map.len())
70                .expect("Unmap failed");
71        }
72    }
73}
74
75impl buffer::Buffer for DumbBuffer {
76    fn size(&self) -> (u32, u32) {
77        self.size
78    }
79    fn format(&self) -> buffer::DrmFourcc {
80        self.format
81    }
82    fn pitch(&self) -> u32 {
83        self.pitch
84    }
85    fn handle(&self) -> buffer::Handle {
86        self.handle
87    }
88}
drm/control/dumbbuffer.rs

drm/control/
dumbbuffer.rs
