Initial commit of 001code-html Scratch frontend project.

Includes scratch-gui, scratch-vm, scratch-blocks, scratch-render, scratch-l10n, and deployment config.

Co-authored-by: Cursor <cursoragent@cursor.com>

scratch-gui/src/lib/bmp-converter.js

@@ -0,0 +1,27 @@
+export default (bmpImage, type = 'image/bmp') => new Promise(resolve => {
+    // If the input is an ArrayBuffer, we need to convert it to a `Blob` and give it a URL so we can use it as an <img>
+    // `src`. If it's a data URI, we can use it as-is.
+    const imageUrl = bmpImage instanceof String ?
+        bmpImage :
+        window.URL.createObjectURL(new Blob([bmpImage], {type}));
+
+    const canvas = document.createElement('canvas');
+    const ctx = canvas.getContext('2d');
+
+    const image = document.createElement('img');
+
+    image.addEventListener('load', () => {
+        canvas.width = image.naturalWidth;
+        canvas.height = image.naturalHeight;
+        ctx.drawImage(image, 0, 0);
+
+        const dataUrl = canvas.toDataURL('image/png');
+
+        // Revoke URL. If a blob URL was generated earlier, this allows the blob to be GC'd and prevents a memory leak.
+        window.URL.revokeObjectURL(imageUrl);
+
+        resolve(dataUrl);
+    });
+
+    image.setAttribute('src', imageUrl);
+});