1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129


cc / paint / skottie_mru_resource_provider.cc [blame]

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/paint/skottie_mru_resource_provider.h"

#include <optional>
#include <utility>

#include "base/check.h"
#include "base/json/json_reader.h"
#include "base/logging.h"
#include "base/values.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkRefCnt.h"

namespace cc {
namespace {

constexpr std::string_view kAssetsKey = "assets";
constexpr std::string_view kIdKey = "id";
constexpr std::string_view kWidthKey = "w";
constexpr std::string_view kHeightKey = "h";

// TODO(fmalita): Remove explicit parsing and pass size param directly from
// Skottie.
base::flat_map</*asset_id*/ std::string, gfx::Size> ParseImageAssetDimensions(
    std::string_view animation_json) {
  base::flat_map<std::string, gfx::Size> image_asset_sizes;

  std::optional<base::Value> animation_dict =
      base::JSONReader::Read(animation_json);
  if (!animation_dict || !animation_dict->is_dict()) {
    LOG(ERROR) << "Failed to parse Lottie animation json";
    return image_asset_sizes;
  }

  const base::Value::List* assets =
      animation_dict->GetDict().FindList(kAssetsKey);
  // An animation may legitimately have no assets in it.
  if (!assets)
    return image_asset_sizes;

  for (const base::Value& asset : *assets) {
    if (!asset.is_dict()) {
      LOG(ERROR) << "Found invalid asset in animation with type "
                 << base::Value::GetTypeName(asset.type());
      continue;
    }
    const base::Value::Dict& asset_dict = asset.GetDict();

    const std::string* id = asset_dict.FindString(kIdKey);
    std::optional<int> width = asset_dict.FindInt(kWidthKey);
    std::optional<int> height = asset_dict.FindInt(kHeightKey);
    if (id && width && height && *width > 0 && *height > 0 &&
        !image_asset_sizes.emplace(*id, gfx::Size(*width, *height)).second) {
      LOG(WARNING) << "Multiple assets found in animation with id " << *id;
    }
  }
  return image_asset_sizes;
}

class ImageAssetImpl : public skresources::ImageAsset {
 public:
  using FrameData = skresources::ImageAsset::FrameData;
  using FrameDataCallback = SkottieWrapper::FrameDataCallback;

  ImageAssetImpl(SkottieResourceIdHash asset_id,
                 FrameDataCallback frame_data_cb)
      : asset_id_(asset_id), frame_data_cb_(std::move(frame_data_cb)) {
    DCHECK(frame_data_cb_);
  }

  bool isMultiFrame() override { return true; }

  FrameData getFrameData(float t) override {
    FrameData new_frame_data;
    SkottieWrapper::FrameDataFetchResult result = frame_data_cb_.Run(
        asset_id_, t, new_frame_data.image, new_frame_data.sampling);
    switch (result) {
      case SkottieWrapper::FrameDataFetchResult::kNewDataAvailable:
        current_frame_data_ = std::move(new_frame_data);
        break;
      case SkottieWrapper::FrameDataFetchResult::kNoUpdate:
        break;
    }
    return current_frame_data_;
  }

 private:
  const SkottieResourceIdHash asset_id_;
  const FrameDataCallback frame_data_cb_;
  FrameData current_frame_data_;
};

}  // namespace

SkottieMRUResourceProvider::SkottieMRUResourceProvider(
    FrameDataCallback frame_data_cb,
    std::string_view animation_json)
    : frame_data_cb_(std::move(frame_data_cb)),
      image_asset_sizes_(ParseImageAssetDimensions(animation_json)) {}

SkottieMRUResourceProvider::~SkottieMRUResourceProvider() = default;

const SkottieResourceMetadataMap&
SkottieMRUResourceProvider::GetImageAssetMetadata() const {
  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
  return image_asset_metadata_;
}

sk_sp<skresources::ImageAsset> SkottieMRUResourceProvider::loadImageAsset(
    const char resource_path[],
    const char resource_name[],
    const char resource_id[]) const {
  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
  std::optional<gfx::Size> size;
  if (image_asset_sizes_.contains(resource_id))
    size.emplace(image_asset_sizes_.at(resource_id));

  if (!image_asset_metadata_.RegisterAsset(resource_path, resource_name,
                                           resource_id, std::move(size))) {
    return nullptr;
  }
  return sk_make_sp<ImageAssetImpl>(HashSkottieResourceId(resource_id),
                                    frame_data_cb_);
}

}  // namespace cc