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75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
/* -*- Mode: C++; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* vim: set sts=2 ts=8 sw=2 tw=99 et: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_gfx_config_gfxFeature_h
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#define mozilla_gfx_config_gfxFeature_h
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#include <stdint.h>
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#include "gfxTelemetry.h"
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#include "mozilla/Assertions.h"
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namespace mozilla {
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namespace gfx {
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#define GFX_FEATURE_MAP(_) \
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/* Name, Type, Description */ \
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_(HW_COMPOSITING, Feature, "Compositing") \
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/* Add new entries above this comment */
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enum class Feature : uint32_t {
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#define MAKE_ENUM(name, type, desc) name,
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GFX_FEATURE_MAP(MAKE_ENUM)
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#undef MAKE_ENUM
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NumValues
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};
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class FeatureState
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{
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public:
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FeatureStatus GetValue() const;
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void EnableByDefault();
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void DisableByDefault(FeatureStatus aStatus, const char* aMessage);
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void SetUser(FeatureStatus aStatus, const char* aMessage);
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void SetEnvironment(FeatureStatus aStatus, const char* aMessage);
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void SetRuntime(FeatureStatus aStatus, const char* aMessage);
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bool IsForcedOnByUser() const;
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bool DisabledByDefault() const;
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bool IsInitialized() const {
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return mDefault.mStatus != FeatureStatus::Unused;
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}
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void AssertInitialized() const {
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MOZ_ASSERT(IsInitialized());
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}
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private:
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struct Instance {
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char mMessage[64];
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FeatureStatus mStatus;
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void Set(FeatureStatus aStatus, const char* aMessage = nullptr);
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};
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// The default state is the state we decide on startup, based on the operating
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// system or a base preference.
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//
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// The user state factors in any changes to preferences that the user made.
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//
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// The environment state factors in any additional decisions made, such as
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// availability or blacklisting.
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//
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// The runtime state factors in any problems discovered at runtime.
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Instance mDefault;
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Instance mUser;
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Instance mEnvironment;
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Instance mRuntime;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif // mozilla_gfx_config_gfxFeature_h
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