chrome/common/thumbnail_capturer.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 chrome.mojom;

import "ui/gfx/geometry/mojo/geometry.mojom";

enum ImageFormat {
  JPEG,
  PNG,
};

interface ThumbnailCapturer {
  // Requests an encoded thumbnail of the image selected by the most recently
  // opened context menu. The encoding format is specified as a parameter. If
  // no image is selected or there's an error capturing a thumbnail,
  // |thumbnail_data| will be empty. If the image area is larger than
  // |thumbnail_min_area_pixels| it will be downscaled to fit within 
  // |thumbnail_max_size_pixels|.
  RequestThumbnailForContextNode(int32 thumbnail_min_area_pixels,
                                 gfx.mojom.Size thumbnail_max_size_pixels,
                                 ImageFormat image_format)
      => (array<uint8> thumbnail_data, gfx.mojom.Size original_size);
};