ash/public/interfaces/display_output_protection.mojom

// Copyright 2017 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.

module ash.mojom;

// An interface for clients that are allowed to control the display output
// content protection. Multiple clients can request content protection at
// the same time, and the display will be protected until all clients are
// closed or set |desired_method_mask| to 0 with |SetContentProtection|.
interface DisplayOutputProtection {
  // Queries link status and protection status.
  // |link_mask| is the type of connected display links, which is a bitmask of
  // DisplayConnectionType values.
  // |protection_mask)| is the desired protection methods, which is a bitmask of
  // the ContentProtectionMethod values.
  // See //ui/display/types/display_constants.h for DisplayConnectionType and
  // ContentProtectionMethod.
  QueryContentProtectionStatus(int64 display_id) => (bool success,
                                                     uint32 link_mask,
                                                     uint32 protection_mask);

  // Requests the desired protection methods.
  // |protection_mask| is the desired protection methods, which is a bitmask
  // of the ContentProtectionMethod values. When the interface is closed,
  // the content protection mask will be reverted.
  // Return true on success. Return false if it failed to make the protection
  // request on the given display.
  // See //ui/display/types/display_constants.h for ContentProtectionMethod.
  SetContentProtection(int64 display_id,
                       uint32 desired_method_mask) => (bool success);
};