wip

# Conflicts:
#	codecs/cpp.Dockerfile
#	codecs/imagequant/example.html
#	codecs/webp/dec/webp_dec.d.ts
#	codecs/webp/dec/webp_dec.js
#	codecs/webp/dec/webp_dec.wasm
#	codecs/webp/enc/webp_enc.d.ts
#	codecs/webp/enc/webp_enc.js
#	codecs/webp/enc/webp_enc.wasm
#	package-lock.json
#	package.json
#	src/codecs/tiny.webp
#	src_old/codecs/encoders.ts
#	src_old/codecs/processor-worker/tiny.avif
#	src_old/codecs/processor-worker/tiny.webp
#	src_old/codecs/tiny.webp
#	src_old/components/compress/index.tsx
#	src_old/lib/util.ts
#	src_old/sw/util.ts

src_old/codecs/resize/processor.ts

@@ -0,0 +1,73 @@
+import { WorkerResizeOptions } from './processor-meta';
+import { getContainOffsets } from './util';
+import { resize as codecResize } from '../../../codecs/resize/pkg';
+
+function crop(
+  data: ImageData,
+  sx: number,
+  sy: number,
+  sw: number,
+  sh: number,
+): ImageData {
+  const inputPixels = new Uint32Array(data.data.buffer);
+
+  // Copy within the same buffer for speed and memory efficiency.
+  for (let y = 0; y < sh; y += 1) {
+    const start = (y + sy) * data.width + sx;
+    inputPixels.copyWithin(y * sw, start, start + sw);
+  }
+
+  return new ImageData(
+    new Uint8ClampedArray(inputPixels.buffer.slice(0, sw * sh * 4)),
+    sw,
+    sh,
+  );
+}
+
+/** Resize methods by index */
+const resizeMethods: WorkerResizeOptions['method'][] = [
+  'triangle',
+  'catrom',
+  'mitchell',
+  'lanczos3',
+];
+
+export async function resize(
+  data: ImageData,
+  opts: WorkerResizeOptions,
+): Promise<ImageData> {
+  let input = data;
+
+  if (opts.fitMethod === 'contain') {
+    const { sx, sy, sw, sh } = getContainOffsets(
+      data.width,
+      data.height,
+      opts.width,
+      opts.height,
+    );
+    input = crop(
+      input,
+      Math.round(sx),
+      Math.round(sy),
+      Math.round(sw),
+      Math.round(sh),
+    );
+  }
+
+  const result = codecResize(
+    new Uint8Array(input.data.buffer),
+    input.width,
+    input.height,
+    opts.width,
+    opts.height,
+    resizeMethods.indexOf(opts.method),
+    opts.premultiply,
+    opts.linearRGB,
+  );
+
+  return new ImageData(
+    new Uint8ClampedArray(result.buffer),
+    opts.width,
+    opts.height,
+  );
+}