feat(web): improve rendering performance of maps

packages/spelunker-web/src/components/core/GameMap/index.jsx

@@ -7,6 +7,7 @@ import 'leaflet/dist/leaflet.css';
 
 import { Box } from '../';
 
+import { drawBlp, loadBlp } from "../../../utils/blp";
 import styles from './index.styl';
 
 const CHUNK_SIZE = 33.3333;
@@ -32,13 +33,33 @@ const loadTileIndex = async (tileDirectory) => {
   TILE_INDEX[tileDirectory] = tileIndex;
 };
 
+const loadTile = async (tileUrl, tile, done) => {
+  const blp = await loadBlp(tileUrl);
+
+  if (!blp) {
+    done(new Error('invalid blp'), tile);
+    return;
+  }
+
+  drawBlp(blp, tile);
+  done(undefined, tile);
+};
+
 class MinimapTileLayer extends TileLayer {
+  createTile(coords, done) {
+    const tile = document.createElement('canvas');
+    const tileUrl = this.getTileUrl(coords);
+    loadTile(tileUrl, tile, done);
+
+    return tile;
+  }
+
   getTileUrl({ x, y }) {
     const tx = 32 + x;
     const ty = 32 + y;
 
     // TODO use real url
-    const unknownTileUrl = `${process.env.PIPELINE_URI}/files/textures/minimap/unknown_${tx}_${ty}`;
+    const unknownTileUrl = `${process.env.DATA_URI}/textures/minimap/unknown_${tx}_${ty}.blp`;
 
     const tileDirectory = this._url;
     if (!tileDirectory) {
@@ -55,7 +76,7 @@ class MinimapTileLayer extends TileLayer {
       return unknownTileUrl;
     }
 
-    return `${process.env.PIPELINE_URI}/files/textures/minimap/${contentPath}.png`;
+    return `${process.env.DATA_URI}/textures/minimap/${contentPath}`;
   }
 }
 

packages/spelunker-web/src/components/images/GameImage/index.jsx

@@ -1,33 +1,22 @@
 import React, { useEffect, useRef } from 'react';
-import { Blp, BLP_IMAGE_FORMAT } from '@wowserhq/format';
 import classNames from 'classnames';
 
+import { loadBlp, drawBlp } from '../../../utils/blp';
 import { toPipelinePath } from '../../../utils/pipeline';
 
 import styles from './index.styl';
 
-const loadBlp = async (canvas, src) => {
-  const blpResponse = await fetch(src);
-  const blpData = await blpResponse.arrayBuffer();
-  const blp = new Blp();
-  blp.load(new Uint8Array(blpData));
-
-  const image = blp.getImage(0, BLP_IMAGE_FORMAT.IMAGE_RGBA8888);
-  const imageData = new ImageData(new Uint8ClampedArray(image.data), image.width, image.height);
-
-  canvas.width = image.width;
-  canvas.height = image.height;
-
-  const context = canvas.getContext('2d');
-  context.putImageData(imageData, 0, 0);
-};
-
 const GameImageBackground = (props) => {
   const canvasRef = useRef();
 
   useEffect(() => {
+    const load = async (src, canvas) => {
+      const blp = await loadBlp(src);
+      drawBlp(blp, canvas);
+    };
+
     if (canvasRef.current) {
-      loadBlp(canvasRef.current, props.src);
+      load(props.src, canvasRef.current);
     }
   }, [props.src]);
 
@@ -50,8 +39,13 @@ const GameImageElement = (props) => {
   const canvasRef = useRef();
 
   useEffect(() => {
+    const load = async (src, canvas) => {
+      const blp = await loadBlp(src);
+      drawBlp(blp, canvas);
+    };
+
     if (canvasRef.current) {
-      loadBlp(canvasRef.current, props.src);
+      load(props.src, canvasRef.current);
     }
   }, [props.src]);
 

packages/spelunker-web/src/utils/blp.js

@@ -0,0 +1,27 @@
+import { Blp, BLP_IMAGE_FORMAT } from "@wowserhq/format";
+
+const drawBlp = (blp, canvas, x = 0, y = 0) => {
+  const image = blp.getImage(0, BLP_IMAGE_FORMAT.IMAGE_RGBA8888);
+  const imageData = new ImageData(new Uint8ClampedArray(image.data), image.width, image.height);
+
+  canvas.width = image.width;
+  canvas.height = image.height;
+
+  const context = canvas.getContext('2d');
+  context.putImageData(imageData, x, y);
+};
+
+const loadBlp = async (src) => {
+  const blpResponse = await fetch(src);
+  if (!blpResponse.ok) {
+    return null;
+  }
+
+  const blpData = await blpResponse.arrayBuffer();
+  const blp = new Blp();
+  blp.load(new Uint8Array(blpData));
+
+  return blp;
+};
+
+export { loadBlp, drawBlp };