d735510f72
A limitation of this implementation is that it can't coexist with anything which creates a canvas context other than `CanvasRenderingContext2D`, since only one context can exist per canvas.
59 lines
1.8 KiB
Rust
59 lines
1.8 KiB
Rust
use softbuffer::GraphicsContext;
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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 mut graphics_context = unsafe { GraphicsContext::new(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 == graphics_context.window().id() => {
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let buffer = (0..((BUFFER_WIDTH * BUFFER_HEIGHT) as usize))
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.map(|index| {
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let y = index / (BUFFER_WIDTH as usize);
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let x = index % (BUFFER_WIDTH as usize);
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let red = x % 255;
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let green = y % 255;
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let blue = (x * y) % 255;
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let color = blue | (green << 8) | (red << 16);
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color as u32
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})
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.collect::<Vec<_>>();
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graphics_context.set_buffer(&buffer, BUFFER_WIDTH as u16, BUFFER_HEIGHT as u16);
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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 == graphics_context.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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