bjorn3
ed9ad1aaf1
Graphics clients will need to handle resizing themself anyway for handoff between graphics drivers and as such don't need the graphics to modify the framebuffer during resize.
60 lines
1.6 KiB
Rust
60 lines
1.6 KiB
Rust
use std::ptr;
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pub struct FrameBuffer {
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pub onscreen: *mut [u32],
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pub phys: usize,
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pub width: usize,
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pub height: usize,
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pub stride: usize,
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}
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impl FrameBuffer {
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pub unsafe fn new(phys: usize, width: usize, height: usize, stride: usize) -> Self {
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let size = stride * height;
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let virt = common::physmap(
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phys,
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size * 4,
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common::Prot {
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read: true,
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write: true,
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},
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common::MemoryType::WriteCombining,
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)
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.expect("vesad: failed to map framebuffer") as *mut u32;
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let onscreen = ptr::slice_from_raw_parts_mut(virt, size);
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Self {
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onscreen,
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phys,
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width,
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height,
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stride,
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}
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}
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pub unsafe fn parse(var: &str) -> Option<Self> {
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fn parse_number(part: &str) -> Option<usize> {
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let (start, radix) = if part.starts_with("0x") {
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(2, 16)
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} else {
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(0, 10)
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};
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match usize::from_str_radix(&part[start..], radix) {
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Ok(ok) => Some(ok),
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Err(err) => {
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eprintln!("vesad: failed to parse '{}': {}", part, err);
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None
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}
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}
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}
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let mut parts = var.split(',');
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let phys = parse_number(parts.next()?)?;
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let width = parse_number(parts.next()?)?;
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let height = parse_number(parts.next()?)?;
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let stride = parse_number(parts.next()?)?;
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Some(Self::new(phys, width, height, stride))
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}
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}
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