naiveproxy/services/data_decoder/public/interfaces/image_decoder.mojom

// 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.

module data_decoder.mojom;

import "mojo/common/time.mojom";
import "skia/public/interfaces/bitmap.mojom";
import "ui/gfx/geometry/mojo/geometry.mojom";

enum ImageCodec {
  DEFAULT,
  ROBUST_JPEG,
  ROBUST_PNG,
};

struct AnimationFrame {
  skia.mojom.Bitmap bitmap;
  mojo.common.mojom.TimeDelta duration;
};

interface ImageDecoder {
  // Decodes image data to a raw skia bitmap.
  //
  // If the total size of the decoded image data in bytes exceeds
  // |max_size_in_bytes| and |shrink_to_fit| is true, the image is halved
  // successively until its total size no longer exceeds |max_size_in_bytes|.
  //
  // If the total size of the decoded image data in bytes exceeds
  // |max_size_in_bytes| and |shrink_to_fit| is false, this is treated as a
  // decoding failure and the |decoded_image| response is null.
  DecodeImage(array<uint8> encoded_data, ImageCodec codec, bool shrink_to_fit,
              int64 max_size_in_bytes, gfx.mojom.Size desired_image_frame_size)
      => (skia.mojom.Bitmap? decoded_image);

  // Decodes the image in |encoded_data|. This will return all frames in the
  // image and assumes it is an animation (instead of say, a multi-sized image).
  //
  // If the total size of the decoded image data in bytes exceeds
  // |max_size_in_bytes| and |shrink_to_fit| is true, the image is halved
  // successively until its total size no longer exceeds |max_size_in_bytes|.
  //
  // If the total size of the decoded image data in bytes exceeds
  // |max_size_in_bytes| and |shrink_to_fit| is false, this is treated as a
  // decoding failure and the |decoded_image| response is null.
  DecodeAnimation(array<uint8> encoded_data, bool shrink_to_fit,
                  int64 max_size_in_bytes)
      => (array<AnimationFrame> decoded_image);
};