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Add a WASM build of the plotters example

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... which uses an intermediate drawing backend to skip the text on the axis, as
that requires TrueType fonts form the filesystem.
This commit is contained in:
Simon Hausmann 2021-08-11 16:14:54 +02:00
parent 0ebd92c253
commit 8903adb584
5 changed files with 154 additions and 2 deletions
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12
examples/plotter/main.rs
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@ -14,6 +14,9 @@ use sixtyfps::SharedPixelBuffer;
#[cfg(target_arch = "wasm32")]
use wasm_bindgen::prelude::*;
#[cfg(target_arch = "wasm32")]
mod wasm_backend;
sixtyfps::sixtyfps! {
import { MainWindow } from "plotter.60";
}
@ -31,7 +34,14 @@ fn render_plot(pitch: f32) -> sixtyfps::Image {
let mut pixel_buffer = SharedPixelBuffer::new(640, 480);
let size = (pixel_buffer.width() as u32, pixel_buffer.height() as u32);
let root = BitMapBackend::with_buffer(pixel_buffer.make_mut_bytes(), size).into_drawing_area();
let backend = BitMapBackend::with_buffer(pixel_buffer.make_mut_bytes(), size);
// Plotters requires TrueType fonts from the file system to draw axis text - we skip that for
// WASM for now.
#[cfg(target_arch = "wasm32")]
let backend = wasm_backend::BackendWithoutText { backend };
let root = backend.into_drawing_area();
root.fill(&WHITE).expect("error filling drawing area");