fix(libultrahdr-wasm): encoding of odd sized images (#31)

Fixes a bug in libultrahdr-wasm which prevented the encoding of odd-sized (non divisible by two) images. The problem originated from external code which operated the check for even sizes for unknown reasons.

tests/encode/encode-and-compress.test.ts

@@ -40,6 +40,22 @@ test('encodes and compresses from exr', async ({ page }) => {
   expect(resized).toMatchSnapshot('memorial.exr-encode-result.png')
 })
 
+test('encodes and compresses odd sized images', async ({ page }) => {
+  await page.goto('/tests/testbed.html', { waitUntil: 'networkidle' })
+
+  const script = page.getByTestId('script')
+  await expect(script).toBeAttached()
+
+  const result = await page.evaluate(encodeAndCompressInBrowser, { file: 'files/odd-sized.exr' })
+
+  const resized = await sharp(Buffer.from(result))
+    .resize({ width: 500, height: 500, fit: 'inside' })
+    .png({ compressionLevel: 9, effort: 10 })
+    .toBuffer()
+
+  expect(resized).toMatchSnapshot('odd-sized.exr-encode-result.png')
+})
+
 test('encodes and compresses from exr using worker', async ({ page }) => {
   await page.goto('/tests/testbed.html', { waitUntil: 'networkidle' })