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Owned pixel buffer for no-copy presentation

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This is based on the API that will be used for no-copy presentation. But
wraps it in `set_buffer`.

This also fixes the Wayland buffer code to set `self.width` and
`self.height` on resize, and set the length of the shared memory file
when the buffer is created.

Co-authored-by: jtnunley <jtnunley01@gmail.com>
This commit is contained in:
Ian Douglas Scott 2023-04-06 00:30:59 -07:00 • committed by GitHub
parent e5d546ff9e
commit a09e4cf679
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19 changed files with 1176 additions and 438 deletions
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29
README.md
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@ -58,6 +58,7 @@ To run an example with the web backend: `cargo run-wasm --example winit`
Example
==
```rust,no_run
use std::num::NonZeroU32;
use winit::event::{Event, WindowEvent};
use winit::event_loop::{ControlFlow, EventLoop};
use winit::window::WindowBuilder;
@ -77,21 +78,25 @@ fn main() {
let size = window.inner_size();
(size.width, size.height)
};
let buffer = (0..((width * height) as usize))
.map(|index| {
let y = index / (width as usize);
let x = index % (width as usize);
let red = x % 255;
let green = y % 255;
let blue = (x * y) % 255;
surface
.resize(
NonZeroU32::new(width).unwrap(),
NonZeroU32::new(height).unwrap(),
)
.unwrap();
let color = blue | (green << 8) | (red << 16);
let mut buffer = surface.buffer_mut().unwrap();
for index in 0..(width * height) {
let y = index / width;
let x = index % width;
let red = x % 255;
let green = y % 255;
let blue = (x * y) % 255;
color as u32
})
.collect::<Vec<_>>();
buffer[index as usize] = blue | (green << 8) | (red << 16);
}
surface.set_buffer(&buffer, width as u16, height as u16);
buffer.present().unwrap();
}
Event::WindowEvent {
event: WindowEvent::CloseRequested,