feat(ext/web): add ImageData Web API (#21183)

Fixes #19288

Adds the `ImageData` Web API. 

This would be beneficial to projects using `ImageData` as a convenient
transport layer for pixel data. This is common in Web Assembly projects
that manipulate images. Having this global available in Deno would
improve compatibility of existing JS libraries.

**References**
- [MDN ImageData Web
API](https://developer.mozilla.org/en-US/docs/Web/API/ImageData)
- [whatwg HTML Standard Canvas
Spec](https://html.spec.whatwg.org/multipage/canvas.html#pixel-manipulation)

1 files changed, 28 insertions, 0 deletions

diff --git a/ext/web/lib.deno_web.d.ts b/ext/web/lib.deno_web.d.ts
index 9b9a55c23..9a70e1501 100644
--- a/ext/web/lib.deno_web.d.ts
+++ b/ext/web/lib.deno_web.d.ts
@@ -1237,3 +1237,31 @@ declare var DecompressionStream: {
 declare function reportError(
   error: any,
 ): void;
+
+/** @category Web APIs */
+type PredefinedColorSpace = "srgb" | "display-p3";
+
+/** @category Web APIs */
+interface ImageDataSettings {
+  readonly colorSpace?: PredefinedColorSpace;
+}
+
+/** @category Web APIs */
+interface ImageData {
+  readonly colorSpace: PredefinedColorSpace;
+  readonly data: Uint8ClampedArray;
+  readonly height: number;
+  readonly width: number;
+}
+
+/** @category Web APIs */
+declare var ImageData: {
+  prototype: ImageData;
+  new (sw: number, sh: number, settings?: ImageDataSettings): ImageData;
+  new (
+    data: Uint8ClampedArray,
+    sw: number,
+    sh?: number,
+    settings?: ImageDataSettings,
+  ): ImageData;
+};