sky/engine/core/painting/TransferMode.cpp

// Copyright 2015 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 "sky/engine/config.h"
#include "sky/engine/core/painting/TransferMode.h"

#include "sky/engine/core/script/dom_dart_state.h"
#include "sky/engine/tonic/dart_builtin.h"
#include "sky/engine/tonic/dart_error.h"
#include "sky/engine/tonic/dart_value.h"

namespace blink {

// Convert dart_mode => SkXfermode::Mode.
TransferMode DartConverter<TransferMode, void>::FromArgumentsWithNullCheck(
    Dart_NativeArguments args,
    int index,
    Dart_Handle& exception) {
  TransferMode result;

  Dart_Handle dart_mode = Dart_GetNativeArgument(args, index);
  DCHECK(!LogIfError(dart_mode));

  Dart_Handle value =
      Dart_GetField(dart_mode, DOMDartState::Current()->value_handle());

  uint64_t mode = 0;
  Dart_Handle rv = Dart_IntegerToUint64(value, &mode);
  DCHECK(!LogIfError(rv));

  result.sk_mode = static_cast<SkXfermode::Mode>(mode);
  return result;
}

} // namespace blink