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6e502cde2e
Review follow-up: - The HDR/WCG decision was taken once when the conversion was created. HDR can be switched on or off, and a WCG desktop can turn into an HDR one, without the duplication being invalidated, so the choice between "divide by the SDR white level" and "no scaling" could go stale. The once-a-second refresh now re-reads it: it keeps an IDXGIFactory1, and when IsCurrent reports FALSE it creates a fresh factory and re-finds the output by GDI name, since a stale factory's outputs keep stale descriptions (this is the procedure the GetDesc1 docs require). On a change it switches modes, re-reads the white level and updates the shader constant; an unreadable level keeps the last known one. - Float frames are only requested when IDXGIOutput6 exists, as Microsoft's duplication sample does. That interface is also what tells HDR from WCG, so there is no longer a state where FP16 is requested without being able to interpret it. IDXGIOutput6 dates from Windows 10 1703, not 1803 as the previous commit said; 1803 added IDXGIFactory6. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01RLb1dNdhFqUQExJPANjo1F
Derived from https://github.com/quadrupleslap/scrap
scrap
Scrap records your screen! At least it does if you're on Windows, macOS, or Linux.
Usage
[dependencies]
scrap = "0.5"
Its API is as simple as it gets!
struct Display; /// A screen.
struct Frame; /// An array of the pixels that were on-screen.
struct Capturer; /// A recording instance.
impl Capturer {
/// Begin recording.
pub fn new(display: Display) -> io::Result<Capturer>;
/// Try to get a frame.
/// Returns WouldBlock if it's not ready yet.
pub fn frame<'a>(&'a mut self) -> io::Result<Frame<'a>>;
pub fn width(&self) -> usize;
pub fn height(&self) -> usize;
}
impl Display {
/// The primary screen.
pub fn primary() -> io::Result<Display>;
/// All the screens.
pub fn all() -> io::Result<Vec<Display>>;
pub fn width(&self) -> usize;
pub fn height(&self) -> usize;
}
impl<'a> ops::Deref for Frame<'a> {
/// A frame is just an array of bytes.
type Target = [u8];
}
The Frame Format
- The frame format is guaranteed to be packed BGRA.
- The width and height are guaranteed to remain constant.
- The stride might be greater than the width, and it may also vary between frames.
System Requirements
| OS | Minimum Requirements |
|---|---|
| macOS | macOS 10.8 |
| Linux | XCB + SHM + RandR |
| Windows | DirectX 11.1 |