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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/shapedetection/face_detector.h"
#include <utility>
#include "services/shape_detection/public/mojom/facedetection_provider.mojom-blink.h"
#include "third_party/blink/public/platform/browser_interface_broker_proxy.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_throw_dom_exception.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_detected_face.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_face_detector_options.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_landmark.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_point_2d.h"
#include "third_party/blink/renderer/core/dom/dom_exception.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/geometry/dom_rect.h"
#include "third_party/blink/renderer/core/workers/worker_thread.h"
#include "third_party/blink/renderer/modules/canvas/imagebitmap/image_bitmap_source_util.h"
#include "third_party/blink/renderer/modules/shapedetection/shape_detection_type_converter.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
FaceDetector* FaceDetector::Create(ExecutionContext* context,
const FaceDetectorOptions* options) {
return MakeGarbageCollected<FaceDetector>(context, options);
}
FaceDetector::FaceDetector(ExecutionContext* context,
const FaceDetectorOptions* options)
: face_service_(context) {
auto face_detector_options =
shape_detection::mojom::blink::FaceDetectorOptions::New();
face_detector_options->max_detected_faces = options->maxDetectedFaces();
face_detector_options->fast_mode = options->fastMode();
mojo::Remote<shape_detection::mojom::blink::FaceDetectionProvider> provider;
// See https://bit.ly/2S0zRAS for task types.
auto task_runner = context->GetTaskRunner(TaskType::kMiscPlatformAPI);
context->GetBrowserInterfaceBroker().GetInterface(
provider.BindNewPipeAndPassReceiver(task_runner));
provider->CreateFaceDetection(
face_service_.BindNewPipeAndPassReceiver(task_runner),
std::move(face_detector_options));
face_service_.set_disconnect_handler(WTF::BindOnce(
&FaceDetector::OnFaceServiceConnectionError, WrapWeakPersistent(this)));
}
ScriptPromise<IDLSequence<DetectedFace>> FaceDetector::detect(
ScriptState* script_state,
const V8ImageBitmapSource* image_source,
ExceptionState& exception_state) {
std::optional<SkBitmap> bitmap = GetBitmapFromV8ImageBitmapSource(
script_state, image_source, exception_state);
if (!bitmap) {
return ScriptPromise<IDLSequence<DetectedFace>>();
}
auto* resolver =
MakeGarbageCollected<ScriptPromiseResolver<IDLSequence<DetectedFace>>>(
script_state, exception_state.GetContext());
auto promise = resolver->Promise();
if (bitmap->isNull()) {
resolver->Resolve(HeapVector<Member<DetectedFace>>());
return promise;
}
if (!face_service_.is_bound()) {
resolver->RejectWithDOMException(DOMExceptionCode::kNotSupportedError,
"Face detection service unavailable.");
return promise;
}
face_service_requests_.insert(resolver);
face_service_->Detect(
std::move(*bitmap),
WTF::BindOnce(&FaceDetector::OnDetectFaces, WrapPersistent(this),
WrapPersistent(resolver)));
return promise;
}
void FaceDetector::OnDetectFaces(
ScriptPromiseResolver<IDLSequence<DetectedFace>>* resolver,
Vector<shape_detection::mojom::blink::FaceDetectionResultPtr>
face_detection_results) {
DCHECK(face_service_requests_.Contains(resolver));
face_service_requests_.erase(resolver);
HeapVector<Member<DetectedFace>> detected_faces;
for (const auto& face : face_detection_results) {
HeapVector<Member<Landmark>> landmarks;
for (const auto& landmark : face->landmarks) {
HeapVector<Member<Point2D>> locations;
for (const auto& location : landmark->locations) {
Point2D* web_location = Point2D::Create();
web_location->setX(location.x());
web_location->setY(location.y());
locations.push_back(web_location);
}
Landmark* web_landmark = Landmark::Create();
web_landmark->setLocations(locations);
web_landmark->setType(mojo::ConvertTo<String>(landmark->type));
landmarks.push_back(web_landmark);
}
DetectedFace* detected_face = DetectedFace::Create();
detected_face->setBoundingBox(DOMRectReadOnly::Create(
face->bounding_box.x(), face->bounding_box.y(),
face->bounding_box.width(), face->bounding_box.height()));
detected_face->setLandmarks(landmarks);
detected_faces.push_back(detected_face);
}
resolver->Resolve(detected_faces);
}
void FaceDetector::OnFaceServiceConnectionError() {
for (const auto& request : face_service_requests_) {
// Check if callback's resolver is still valid.
if (!IsInParallelAlgorithmRunnable(request->GetExecutionContext(),
request->GetScriptState())) {
continue;
}
// Enter into resolver's context to support creating DOMException.
ScriptState::Scope script_state_scope(request->GetScriptState());
request->Reject(V8ThrowDOMException::CreateOrDie(
request->GetScriptState()->GetIsolate(),
DOMExceptionCode::kNotSupportedError,
"Face Detection not implemented."));
}
face_service_requests_.clear();
face_service_.reset();
}
void FaceDetector::Trace(Visitor* visitor) const {
ScriptWrappable::Trace(visitor);
visitor->Trace(face_service_);
visitor->Trace(face_service_requests_);
}
} // namespace blink
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