src/cobalt/configuration/configuration.h

// Copyright 2020 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef COBALT_CONFIGURATION_CONFIGURATION_H_
#define COBALT_CONFIGURATION_CONFIGURATION_H_

#include "base/macros.h"
#include "cobalt/extension/configuration.h"

namespace base {
template <typename T>
struct DefaultSingletonTraits;
}

namespace cobalt {
namespace configuration {

// The Configuration changes certain Cobalt features as specified by the
// platform. This class picks up values set in the
// CobaltConfigurationExtensionApi if it is implemented by the platform and
// will otherwise use default configurations.
class Configuration {
 public:
  // The Configuration is a singleton initialized on the first call of
  // GetInstance(). Calls to this function will return a pointer to the same
  // instance as was previously initialized.
  static Configuration* GetInstance();

  const char* CobaltUserOnExitStrategy();
  bool CobaltRenderDirtyRegionOnly();
  int CobaltEglSwapInterval();
  const char* CobaltFallbackSplashScreenUrl();
  int CobaltSkiaCacheSizeInBytes();
  bool CobaltEnableQuic();
  int CobaltOffscreenTargetCacheSizeInBytes();
  int CobaltEncodedImageCacheSizeInBytes();
  int CobaltImageCacheSizeInBytes();
  int CobaltLocalTypefaceCacheSizeInBytes();
  int CobaltRemoteTypefaceCacheSizeInBytes();
  int CobaltMeshCacheSizeInBytes();
  int CobaltSoftwareSurfaceCacheSizeInBytes();
  float CobaltImageCacheCapacityMultiplierWhenPlayingVideo();
  int CobaltSkiaGlyphAtlasWidth();
  int CobaltSkiaGlyphAtlasHeight();
  int CobaltJsGarbageCollectionThresholdInBytes();
  int CobaltReduceCpuMemoryBy();
  int CobaltReduceGpuMemoryBy();
  bool CobaltGcZeal();
  const char* CobaltRasterizerType();
  bool CobaltEnableJit();
  const char* CobaltFallbackSplashScreenTopics();

 private:
  Configuration();

  friend struct base::DefaultSingletonTraits<Configuration>;
  const CobaltExtensionConfigurationApi* configuration_api_;
  static Configuration* configuration_;

  DISALLOW_COPY_AND_ASSIGN(Configuration);
};

}  // namespace configuration
}  // namespace cobalt

#endif  // COBALT_CONFIGURATION_CONFIGURATION_H_