From 874077bf87e15208ba4d7bfab0095c3a60e4be17 Mon Sep 17 00:00:00 2001
From: Melody Horn <melody@boringcactus.com>
Date: Sat, 4 Dec 2021 17:35:02 -0700
Subject: cock

---
 src/lib.rs | 21 ++++++++++++++++++---
 src/ocr.rs | 39 ++++++++++++++++++++++-----------------
 2 files changed, 40 insertions(+), 20 deletions(-)

(limited to 'src')

diff --git a/src/lib.rs b/src/lib.rs
index 8c8bcc3..e90202d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,6 +2,8 @@ use image::{DynamicImage, ImageFormat};
 use std::cell::{Cell, RefCell};
 use std::rc::Rc;
 
+use futures::channel::mpsc;
+use futures::prelude::*;
 use wasm_bindgen::prelude::*;
 use wasm_bindgen::JsCast;
 use wasm_bindgen_futures::*;
@@ -84,6 +86,8 @@ async fn do_boot() {
 
     let history = Rc::new(RefCell::new(history::History::default()));
 
+    let (manual_update_tx, manual_update_rx) = mpsc::channel::<()>(5);
+
     let video: HtmlVideoElement = document
         .get_element_by_id("video")
         .unwrap()
@@ -107,7 +111,9 @@ async fn do_boot() {
         let width = width.clone();
         let height = height.clone();
         let target_marker = target_marker.clone();
+        let manual_update_tx = manual_update_tx.clone();
         gloo::events::EventListener::new(&video, "click", move |event| {
+            let mut manual_update_tx = manual_update_tx.clone();
             let video = also_video.clone();
             let mouse_event: &MouseEvent = event.dyn_ref().unwrap();
             let mouse_x = mouse_event.offset_x() as f64;
@@ -120,6 +126,7 @@ async fn do_boot() {
             let real_y = mouse_y / fake_height * real_height - QUEUE_SIZE_HEIGHT as f64 / 2.0;
             queue_position.replace((real_x.round() as u32, real_y.round() as u32));
             update_target_marker(&target_marker, &width, &height, &video, &queue_position);
+            spawn_local(async move { manual_update_tx.send(()).await.unwrap() });
         })
     };
     video_click_listener.forget();
@@ -146,7 +153,9 @@ async fn do_boot() {
         let also_video = video.clone();
         let canvas = canvas.clone();
         let queue_position = queue_position.clone();
+        let manual_update_tx = manual_update_tx.clone();
         gloo::events::EventListener::new(&video, "canplay", move |_event| {
+            let mut manual_update_tx = manual_update_tx.clone();
             let video = also_video.clone();
             let _ = video.play().unwrap();
             if !streaming.get() {
@@ -156,16 +165,21 @@ async fn do_boot() {
                 canvas.set_attribute("height", &format!("{}", height.get()));
                 streaming.set(true);
                 update_target_marker(&target_marker, &width, &height, &video, &queue_position);
+                spawn_local(async move { manual_update_tx.send(()).await.unwrap() });
             }
         })
     };
     video_play_listener.forget();
 
-    let update_interval = gloo::timers::callback::Interval::new(2_000, move || {
+    let update_stream = futures::stream_select!(
+        gloo::timers::future::IntervalStream::new(2_000),
+        manual_update_rx,
+    );
+    let update_future = update_stream.for_each(move |_| {
         let history = history.clone();
         let queue_position = queue_position.clone();
         if !streaming.get() {
-            return;
+            return futures::future::ready(());
         }
         let context = canvas.get_context("2d").unwrap().unwrap();
         let context: CanvasRenderingContext2d = context.dyn_into().unwrap();
@@ -247,8 +261,9 @@ async fn do_boot() {
                 .unwrap(),
             )
             .unwrap();
+        futures::future::ready(())
     });
-    update_interval.forget();
+    spawn_local(update_future);
 }
 
 #[wasm_bindgen]
diff --git a/src/ocr.rs b/src/ocr.rs
index cde116f..14021cc 100644
--- a/src/ocr.rs
+++ b/src/ocr.rs
@@ -1,18 +1,27 @@
 use image::{DynamicImage, GrayImage, ImageFormat};
 use imageproc::template_matching::MatchTemplateMethod;
+use lazy_static::lazy_static;
 
-const REFERENCE_PNGS: [&[u8]; 10] = [
-    include_bytes!("../data/0.png"),
-    include_bytes!("../data/1.png"),
-    include_bytes!("../data/2.png"),
-    include_bytes!("../data/3.png"),
-    include_bytes!("../data/4.png"),
-    include_bytes!("../data/5.png"),
-    include_bytes!("../data/6.png"),
-    include_bytes!("../data/7.png"),
-    include_bytes!("../data/8.png"),
-    include_bytes!("../data/9.png"),
-];
+lazy_static! {
+    static ref REFERENCES: [GrayImage; 10] = {
+        let parse = |data: &[u8]| {
+            let png = image::load_from_memory_with_format(data, ImageFormat::Png).unwrap();
+            image::imageops::grayscale(&png)
+        };
+        [
+            parse(include_bytes!("../data/0.png")),
+            parse(include_bytes!("../data/1.png")),
+            parse(include_bytes!("../data/2.png")),
+            parse(include_bytes!("../data/3.png")),
+            parse(include_bytes!("../data/4.png")),
+            parse(include_bytes!("../data/5.png")),
+            parse(include_bytes!("../data/6.png")),
+            parse(include_bytes!("../data/7.png")),
+            parse(include_bytes!("../data/8.png")),
+            parse(include_bytes!("../data/9.png")),
+        ]
+    };
+}
 
 fn x_matches(image: &GrayImage, template: &GrayImage) -> Vec<u32> {
     let match_values = imageproc::template_matching::match_template(
@@ -31,11 +40,7 @@ pub fn ocr(image: DynamicImage) -> Option<u32> {
     let grayscale_image = image::imageops::grayscale(&image);
     let mut digit_x_positions: Vec<(u8, u32)> = (0..10)
         .flat_map(|i| {
-            let png_i =
-                image::load_from_memory_with_format(REFERENCE_PNGS[i as usize], ImageFormat::Png)
-                    .unwrap();
-            let grey_png_i = image::imageops::grayscale(&png_i);
-            x_matches(&grayscale_image, &grey_png_i)
+            x_matches(&grayscale_image, &REFERENCES[i as usize])
                 .into_iter()
                 .map(move |x| (i, x))
         })
-- 
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