1 files changed, 215 insertions, 0 deletions
diff --git a/ext/web/16_image_data.js b/ext/web/16_image_data.js
new file mode 100644
index 000000000..a753a34cf
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+++ b/ext/web/16_image_data.js
@@ -0,0 +1,215 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+import * as webidl from "ext:deno_webidl/00_webidl.js";
+import DOMException from "ext:deno_web/01_dom_exception.js";
+import { createFilteredInspectProxy } from "ext:deno_console/01_console.js";
+const primordials = globalThis.__bootstrap.primordials;
+const {
+  ObjectPrototypeIsPrototypeOf,
+  SymbolFor,
+  TypedArrayPrototypeGetLength,
+  TypedArrayPrototypeGetSymbolToStringTag,
+  Uint8ClampedArray,
+} = primordials;
+
+webidl.converters["PredefinedColorSpace"] = webidl.createEnumConverter(
+  "PredefinedColorSpace",
+  [
+    "srgb",
+    "display-p3",
+  ],
+);
+
+webidl.converters["ImageDataSettings"] = webidl.createDictionaryConverter(
+  "ImageDataSettings",
+  [
+    { key: "colorSpace", converter: webidl.converters["PredefinedColorSpace"] },
+  ],
+);
+
+class ImageData {
+  /** @type {number} */
+  #width;
+  /** @type {height} */
+  #height;
+  /** @type {Uint8Array} */
+  #data;
+  /** @type {'srgb' | 'display-p3'} */
+  #colorSpace;
+
+  constructor(arg0, arg1, arg2 = undefined, arg3 = undefined) {
+    webidl.requiredArguments(
+      arguments.length,
+      2,
+      'Failed to construct "ImageData"',
+    );
+    this[webidl.brand] = webidl.brand;
+
+    let sourceWidth;
+    let sourceHeight;
+    let data;
+    let settings;
+    const prefix = "Failed to construct 'ImageData'";
+
+    // Overload: new ImageData(data, sw [, sh [, settings ] ])
+    if (
+      arguments.length > 3 ||
+      TypedArrayPrototypeGetSymbolToStringTag(arg0) === "Uint8ClampedArray"
+    ) {
+      data = webidl.converters.Uint8ClampedArray(arg0, prefix, "Argument 1");
+      sourceWidth = webidl.converters["unsigned long"](
+        arg1,
+        prefix,
+        "Argument 2",
+      );
+      const dataLength = TypedArrayPrototypeGetLength(data);
+
+      if (webidl.type(arg2) !== "Undefined") {
+        sourceHeight = webidl.converters["unsigned long"](
+          arg2,
+          prefix,
+          "Argument 3",
+        );
+      }
+
+      settings = webidl.converters["ImageDataSettings"](
+        arg3,
+        prefix,
+        "Argument 4",
+      );
+
+      if (dataLength === 0) {
+        throw new DOMException(
+          "Failed to construct 'ImageData': The input data has zero elements.",
+          "InvalidStateError",
+        );
+      }
+
+      if (dataLength % 4 !== 0) {
+        throw new DOMException(
+          "Failed to construct 'ImageData': The input data length is not a multiple of 4.",
+          "InvalidStateError",
+        );
+      }
+
+      if (sourceWidth < 1) {
+        throw new DOMException(
+          "Failed to construct 'ImageData': The source width is zero or not a number.",
+          "IndexSizeError",
+        );
+      }
+
+      if (webidl.type(sourceHeight) !== "Undefined" && sourceHeight < 1) {
+        throw new DOMException(
+          "Failed to construct 'ImageData': The source height is zero or not a number.",
+          "IndexSizeError",
+        );
+      }
+
+      if (dataLength / 4 % sourceWidth !== 0) {
+        throw new DOMException(
+          "Failed to construct 'ImageData': The input data length is not a multiple of (4 * width).",
+          "IndexSizeError",
+        );
+      }
+
+      if (
+        webidl.type(sourceHeight) !== "Undefined" &&
+        (sourceWidth * sourceHeight * 4 !== dataLength)
+      ) {
+        throw new DOMException(
+          "Failed to construct 'ImageData': The input data length is not equal to (4 * width * height).",
+          "IndexSizeError",
+        );
+      }
+
+      if (webidl.type(sourceHeight) === "Undefined") {
+        this.#height = dataLength / 4 / sourceWidth;
+      } else {
+        this.#height = sourceHeight;
+      }
+
+      this.#colorSpace = settings.colorSpace ?? "srgb";
+      this.#width = sourceWidth;
+      this.#data = data;
+      return;
+    }
+
+    // Overload: new ImageData(sw, sh [, settings])
+    sourceWidth = webidl.converters["unsigned long"](
+      arg0,
+      prefix,
+      "Argument 1",
+    );
+    sourceHeight = webidl.converters["unsigned long"](
+      arg1,
+      prefix,
+      "Argument 2",
+    );
+
+    settings = webidl.converters["ImageDataSettings"](
+      arg2,
+      prefix,
+      "Argument 3",
+    );
+
+    if (sourceWidth < 1) {
+      throw new DOMException(
+        "Failed to construct 'ImageData': The source width is zero or not a number.",
+        "IndexSizeError",
+      );
+    }
+
+    if (sourceHeight < 1) {
+      throw new DOMException(
+        "Failed to construct 'ImageData': The source height is zero or not a number.",
+        "IndexSizeError",
+      );
+    }
+
+    this.#colorSpace = settings.colorSpace ?? "srgb";
+    this.#width = sourceWidth;
+    this.#height = sourceHeight;
+    this.#data = new Uint8ClampedArray(sourceWidth * sourceHeight * 4);
+  }
+
+  get width() {
+    webidl.assertBranded(this, ImageDataPrototype);
+    return this.#width;
+  }
+
+  get height() {
+    webidl.assertBranded(this, ImageDataPrototype);
+    return this.#height;
+  }
+
+  get data() {
+    webidl.assertBranded(this, ImageDataPrototype);
+    return this.#data;
+  }
+
+  get colorSpace() {
+    webidl.assertBranded(this, ImageDataPrototype);
+    return this.#colorSpace;
+  }
+
+  [SymbolFor("Deno.privateCustomInspect")](inspect, inspectOptions) {
+    return inspect(
+      createFilteredInspectProxy({
+        object: this,
+        evaluate: ObjectPrototypeIsPrototypeOf(ImageDataPrototype, this),
+        keys: [
+          "data",
+          "width",
+          "height",
+          "colorSpace",
+        ],
+      }),
+      inspectOptions,
+    );
+  }
+}
+
+const ImageDataPrototype = ImageData.prototype;
+
+export { ImageData };