Image Capture: Reject applyConstraints() if passed an unsupported constraint

third_party/WebKit/Source/modules/imagecapture/ImageCapture.cpp

 // 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.
 
 #include "modules/imagecapture/ImageCapture.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
@@ skipping 243 matching lines @@
     const HeapVector<MediaTrackConstraintSet>& constraints_vector) {
   if (!service_) {
     resolver->Reject(DOMException::Create(kNotFoundError, kNoServiceError));
     return;
   }
   service_requests_.insert(resolver);
 
   // TODO(mcasas): add support more than one single advanced constraint.
   const auto constraints = constraints_vector[0];
 
+  if ((constraints.hasWhiteBalanceMode() &&
+       !capabilities_.hasWhiteBalanceMode()) ||
+      (constraints.hasExposureMode() && !capabilities_.hasExposureMode()) ||
+      (constraints.hasFocusMode() && !capabilities_.hasFocusMode()) ||
+      (constraints.hasExposureCompensation() &&
+       !capabilities_.hasExposureCompensation()) ||
+      (constraints.hasColorTemperature() &&
+       !capabilities_.hasColorTemperature()) ||
+      (constraints.hasIso() && !capabilities_.hasIso()) ||
+      (constraints.hasBrightness() && !capabilities_.hasBrightness()) ||
+      (constraints.hasContrast() && !capabilities_.hasContrast()) ||
+      (constraints.hasSaturation() && !capabilities_.hasSaturation()) ||
+      (constraints.hasSharpness() && !capabilities_.hasSharpness()) ||
+      (constraints.hasZoom() && !capabilities_.hasZoom()) ||
+      (constraints.hasTorch() && !capabilities_.hasTorch())) {
+    resolver->Reject(
+        DOMException::Create(kNotSupportedError, "Unsupported constraint(s)"));
+    return;
+  }
+
   auto settings = media::mojom::blink::PhotoSettings::New();
 
   // TODO(mcasas): support other Mode types beyond simple string i.e. the
   // equivalents of "sequence<DOMString>"" or "ConstrainDOMStringParameters".
   settings->has_white_balance_mode = constraints.hasWhiteBalanceMode() &&
                                      constraints.whiteBalanceMode().isString();
   if (settings->has_white_balance_mode) {
     current_constraints_.setWhiteBalanceMode(constraints.whiteBalanceMode());
     settings->white_balance_mode =
         ParseMeteringMode(constraints.whiteBalanceMode().getAsString());
@@ skipping 358 matching lines @@
   visitor->Trace(stream_track_);
   visitor->Trace(capabilities_);
   visitor->Trace(settings_);
   visitor->Trace(current_constraints_);
   visitor->Trace(service_requests_);
   EventTargetWithInlineData::Trace(visitor);
   ContextLifecycleObserver::Trace(visitor);
 }
 
 }  // namespace blink