a09e4cf679
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>
64 lines
2 KiB
Rust
64 lines
2 KiB
Rust
use std::num::NonZeroU32;
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use winit::event::{Event, WindowEvent};
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use winit::event_loop::{ControlFlow, EventLoop};
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use winit::window::WindowBuilder;
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const BUFFER_WIDTH: usize = 256;
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const BUFFER_HEIGHT: usize = 128;
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fn main() {
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let event_loop = EventLoop::new();
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let window = WindowBuilder::new().build(&event_loop).unwrap();
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#[cfg(target_arch = "wasm32")]
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{
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use winit::platform::web::WindowExtWebSys;
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web_sys::window()
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.unwrap()
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.document()
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.unwrap()
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.body()
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.unwrap()
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.append_child(&window.canvas())
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.unwrap();
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}
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let context = unsafe { softbuffer::Context::new(&window) }.unwrap();
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let mut surface = unsafe { softbuffer::Surface::new(&context, &window) }.unwrap();
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event_loop.run(move |event, _, control_flow| {
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*control_flow = ControlFlow::Wait;
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match event {
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Event::RedrawRequested(window_id) if window_id == window.id() => {
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surface
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.resize(
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NonZeroU32::new(BUFFER_WIDTH as u32).unwrap(),
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NonZeroU32::new(BUFFER_HEIGHT as u32).unwrap(),
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)
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.unwrap();
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let mut buffer = surface.buffer_mut().unwrap();
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for y in 0..BUFFER_HEIGHT {
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for x in 0..BUFFER_WIDTH {
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let red = x as u32 % 255;
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let green = y as u32 % 255;
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let blue = (x as u32 * y as u32) % 255;
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let color = blue | (green << 8) | (red << 16);
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buffer[y * BUFFER_WIDTH + x] = color;
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}
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}
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buffer.present().unwrap();
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}
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Event::WindowEvent {
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event: WindowEvent::CloseRequested,
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window_id,
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} if window_id == window.id() => {
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*control_flow = ControlFlow::Exit;
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}
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_ => {}
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}
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});
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}
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