ui/gfx/icc_profile.cc

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/354829279): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "ui/gfx/icc_profile.h"

#include <array>
#include <list>
#include <set>

#include "base/command_line.h"
#include "base/containers/lru_cache.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/synchronization/lock.h"
#include "third_party/skia/include/core/SkColorSpace.h"
#include "third_party/skia/include/core/SkData.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "third_party/skia/include/encode/SkICC.h"
#include "third_party/skia/modules/skcms/skcms.h"
#include "ui/gfx/skia_color_space_util.h"

namespace gfx {

namespace {

static const size_t kMaxCachedICCProfiles = 16;

// An LRU cache mapping data to ICCProfile objects, to avoid re-parsing
// profiles every time they are read.
using DataToProfileCacheBase = base::LRUCache<std::vector<char>, ICCProfile>;
class DataToProfileCache : public DataToProfileCacheBase {
 public:
  DataToProfileCache() : DataToProfileCacheBase(kMaxCachedICCProfiles) {}
};
base::LazyInstance<DataToProfileCache>::Leaky g_data_to_profile_cache =
    LAZY_INSTANCE_INITIALIZER;

// Lock that must be held to access |g_data_to_profile_cache|.
base::LazyInstance<base::Lock>::Leaky g_icc_profile_lock =
    LAZY_INSTANCE_INITIALIZER;

}  // namespace

void ICCProfile::Internals::Initialize() {
  // Start out with no parametric data.
  if (data_.empty())
    return;

  // Parse the profile.
  skcms_ICCProfile profile;
  if (!skcms_Parse(data_.data(), data_.size(), &profile)) {
    DLOG(ERROR) << "Failed to parse ICC profile.";
    return;
  }