Add editor to this repository

src/animation/sprites.js

@@ -79,6 +79,62 @@ export class BirdType {
 	}
 }
 
+/**
+ * Load a sprite sheet image and convert it to a 2D array of palette color names
+ * @param {string} src - URL or data URI of the sprite sheet image
+ * @param {boolean} [templateColors] - Whether to map pixel colors to palette names
+ * @returns {Promise<string[][]>}
+ */
+export function loadSpriteSheetPixels(src, templateColors = true) {
+	return new Promise((resolve, reject) => {
+		const img = new Image();
+		img.src = src;
+		img.onload = () => {
+			const canvas = document.createElement('canvas');
+			canvas.width = img.width;
+			canvas.height = img.height;
+			const ctx = canvas.getContext('2d');
+			if (!ctx) {
+				reject(new Error('Failed to get canvas context'));
+				return;
+			}
+			ctx.drawImage(img, 0, 0);
+			const imageData = ctx.getImageData(0, 0, img.width, img.height);
+			const pixels = imageData.data;
+			const hexArray = [];
+			for (let y = 0; y < img.height; y++) {
+				const row = [];
+				for (let x = 0; x < img.width; x++) {
+					const index = (y * img.width + x) * 4;
+					const r = pixels[index];
+					const g = pixels[index + 1];
+					const b = pixels[index + 2];
+					const a = pixels[index + 3];
+					if (a === 0) {
+						row.push(PALETTE.TRANSPARENT);
+						continue;
+					}
+					const hex = `#${((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1)}`;
+					if (!templateColors) {
+						row.push(hex);
+						continue;
+					}
+					if (SPRITE_SHEET_COLOR_MAP[hex] === undefined) {
+						row.push(hex);
+						continue;
+					}
+					row.push(SPRITE_SHEET_COLOR_MAP[hex]);
+				}
+				hexArray.push(row);
+			}
+			resolve(hexArray);
+		};
+		img.onerror = (err) => {
+			reject(err);
+		};
+	});
+}
+
 /** @type {Record<string, BirdType>} */
 export const SPECIES = Object.fromEntries(
 	Object.entries(species).map(([id, data]) => [

src/application.js

@@ -25,7 +25,8 @@ import {
 import {
 	PALETTE,
 	SPRITE_SHEET_COLOR_MAP,
-	SPECIES
+	SPECIES,
+	loadSpriteSheetPixels,
 } from './animation/sprites.js';
 import {
 	StickyNote,
@@ -1202,59 +1203,3 @@ function startApplication(birbPixels, featherPixels, hatsPixels) {
 	draw();
 }
 
-/**
- * Load the sprite sheet and return the pixel-map template
- * @param {string} dataUri
- * @param {boolean} [templateColors]
- * @returns {Promise<string[][]>}
- */
-function loadSpriteSheetPixels(dataUri, templateColors = true) {
-	return new Promise((resolve, reject) => {
-		const img = new Image();
-		img.src = dataUri;
-		img.onload = () => {
-			const canvas = document.createElement('canvas');
-			canvas.width = img.width;
-			canvas.height = img.height;
-			const ctx = canvas.getContext('2d');
-			if (!ctx) {
-				reject(new Error('Failed to get canvas context'));
-				return;
-			}
-			ctx.drawImage(img, 0, 0);
-			const imageData = ctx.getImageData(0, 0, img.width, img.height);
-			const pixels = imageData.data;
-			const hexArray = [];
-			for (let y = 0; y < img.height; y++) {
-				const row = [];
-				for (let x = 0; x < img.width; x++) {
-					const index = (y * img.width + x) * 4;
-					const r = pixels[index];
-					const g = pixels[index + 1];
-					const b = pixels[index + 2];
-					const a = pixels[index + 3];
-					if (a === 0) {
-						row.push(PALETTE.TRANSPARENT);
-						continue;
-					}
-					const hex = `#${((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1)}`;
-					if (!templateColors) {
-						row.push(hex);
-						continue;
-					}
-					if (SPRITE_SHEET_COLOR_MAP[hex] === undefined) {
-						// Return the color as-is if not found in the map
-						row.push(hex);
-						continue;
-					}
-					row.push(SPRITE_SHEET_COLOR_MAP[hex]);
-				}
-				hexArray.push(row);
-			}
-			resolve(hexArray);
-		};
-		img.onerror = (err) => {
-			reject(err);
-		};
-	});
-}