ShapeDetection: implement barcode detection, blink part

third_party/WebKit/Source/modules/shapedetection/ShapeDetector.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ShapeDetector_h
+#define ShapeDetector_h
+
+#include "bindings/core/v8/ScriptPromise.h"
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "modules/ModulesExport.h"
+#include "modules/canvas2d/CanvasRenderingContext2D.h"
+#include "public/platform/modules/shapedetection/shapedetection.mojom-blink.h"
+
+namespace blink {
+
+class LocalFrame;
+
+class MODULES_EXPORT ShapeDetector
+    : public GarbageCollectedFinalized<ShapeDetector> {
+ public:
+  enum class DetectorType {
+    Face,
+    Barcode
+    // TODO(mcasas): Implement TextDetector after
+    // https://github.com/WICG/shape-detection-api/issues/6
+  };
+  explicit ShapeDetector(LocalFrame&);
+  virtual ~ShapeDetector() = default;
+
+  ScriptPromise detectShapes(ScriptState*,
+                             DetectorType,
+                             const CanvasImageSourceUnion&);
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  ScriptPromise detectShapesOnImageElement(DetectorType,
+                                           ScriptPromiseResolver*,
+                                           const HTMLImageElement*);
+  ScriptPromise detectShapesOnImageBitmap(DetectorType,
+                                          ScriptPromiseResolver*,
+                                          ImageBitmap*);
+  ScriptPromise detectShapesOnVideoElement(DetectorType,
+                                           ScriptPromiseResolver*,
+                                           const HTMLVideoElement*);
+
+  ScriptPromise detectShapesOnData(DetectorType,
+                                   ScriptPromiseResolver*,
+                                   uint8_t* data,
+                                   int size,
+                                   int width,
+                                   int height);
+  void onDetectFaces(ScriptPromiseResolver*,
+                     mojom::blink::FaceDetectionResultPtr);
+  void onDetectBarcodes(ScriptPromiseResolver*,
+                        Vector<mojom::blink::BarcodeDetectionResultPtr>);
+
+  mojom::blink::ShapeDetectionPtr m_service;
+
+  HeapHashSet<Member<ScriptPromiseResolver>> m_serviceRequests;
+};
+
+}  // namespace blink
+
+#endif  // ShapeDetector_h